From: Brendan Hansen Date: Sat, 2 Apr 2022 17:30:58 +0000 (-0500) Subject: restructured project for client/server separation X-Git-Url: https://git.brendanfh.com/?a=commitdiff_plain;h=4bf000c4d3d19301376952b955cb0215c459cc16;p=voxel-shooter.git restructured project for client/server separation --- diff --git a/lib/stb_image.c b/lib/stb_image.c deleted file mode 100644 index 7be2139..0000000 --- a/lib/stb_image.c +++ /dev/null @@ -1,93 +0,0 @@ -#define ONYX_LIBRARY_NAME stb_image -#include "onyx_library.h" - -static wasm_func_t* stbi_heap_alloc = NULL; -static void *__onyx_stbi_heap_alloc_wrapper(int size) { - if (stbi_heap_alloc == NULL) { - wasm_extern_t *stbi_heap_alloc_extern = runtime->wasm_extern_lookup_by_name(runtime->wasm_module, runtime->wasm_instance, "stbi_heap_alloc"); - stbi_heap_alloc = runtime->wasm_extern_as_func(stbi_heap_alloc_extern); - assert(stbi_heap_alloc != NULL); - } - - wasm_val_t args[] = { WASM_I32_VAL(size) }; - wasm_val_t results[1]; - wasm_val_vec_t args_arr = WASM_ARRAY_VEC(args); - wasm_val_vec_t results_arr = WASM_ARRAY_VEC(results); - - runtime->wasm_func_call(stbi_heap_alloc, &args_arr, &results_arr); - return ONYX_PTR(results[0].of.i32); -} - -static wasm_func_t* stbi_heap_resize = NULL; -static void *__onyx_stbi_heap_resize_wrapper(void* ptr, int size) { - if (stbi_heap_resize == NULL) { - wasm_extern_t *stbi_heap_resize_extern = runtime->wasm_extern_lookup_by_name(runtime->wasm_module, runtime->wasm_instance, "stbi_heap_resize"); - stbi_heap_resize = runtime->wasm_extern_as_func(stbi_heap_resize_extern); - } - - int onyx_ptr = 0; - if (ptr != NULL) onyx_ptr = (int) ((char*) ptr - runtime->wasm_memory_data(runtime->wasm_memory)); - - wasm_val_t args[] = { WASM_I32_VAL(onyx_ptr), WASM_I32_VAL(size) }; - wasm_val_t results[1]; - wasm_val_vec_t args_arr = WASM_ARRAY_VEC(args); - wasm_val_vec_t results_arr = WASM_ARRAY_VEC(results); - - runtime->wasm_func_call(stbi_heap_resize, &args_arr, &results_arr); - return ONYX_PTR(results[0].of.i32); -} - -static wasm_func_t* stbi_heap_free = NULL; -static void __onyx_stbi_heap_free_wrapper(void *ptr) { - if (stbi_heap_free == NULL) { - wasm_extern_t *stbi_heap_free_extern = runtime->wasm_extern_lookup_by_name(runtime->wasm_module, runtime->wasm_instance, "stbi_heap_free"); - stbi_heap_free = runtime->wasm_extern_as_func(stbi_heap_free_extern); - } - - if (ptr == NULL) return; - - int onyx_ptr = (int) ((char*) ptr - runtime->wasm_memory_data(runtime->wasm_memory)); - - wasm_val_t args[] = { WASM_I32_VAL(onyx_ptr) }; - wasm_val_vec_t results = {0,0}; - wasm_val_vec_t args_arr = WASM_ARRAY_VEC(args); - - runtime->wasm_func_call(stbi_heap_free, &args_arr, &results); -} - -#define STBI_MALLOC(s) __onyx_stbi_heap_alloc_wrapper(s) -#define STBI_REALLOC(p,newsz) __onyx_stbi_heap_resize_wrapper(p,newsz) -#define STBI_FREE(p) __onyx_stbi_heap_free_wrapper(p) - -#define STB_IMAGE_IMPLEMENTATION -#include "stb_image.h" - -#define PTR WASM_I32 -#define INT WASM_I32 -#define FLOAT WASM_F32 -#define PARAM(n, k) (params->data[n].of.k) - -ONYX_DEF(stbi_load, (PTR, PTR, PTR, PTR, INT), (PTR)) { - unsigned char *data = stbi_load( - (char *) ONYX_PTR(PARAM(0, i32)), - (int *) ONYX_PTR(PARAM(1, i32)), - (int *) ONYX_PTR(PARAM(2, i32)), - (int *) ONYX_PTR(PARAM(3, i32)), - PARAM(4, i32)); - - if (data == NULL) results->data[0] = WASM_I32_VAL(0); - else results->data[0] = WASM_I32_VAL(data - (unsigned char *) runtime->wasm_memory_data(runtime->wasm_memory)); - return NULL; -} - -ONYX_DEF(stbi_image_free, (PTR), ()) { - stbi_image_free(ONYX_PTR(PARAM(0, i32))); - return NULL; -} - -ONYX_LIBRARY { - ONYX_FUNC(stbi_load) - ONYX_FUNC(stbi_image_free) - - NULL -}; diff --git a/lib/stb_image.h b/lib/stb_image.h deleted file mode 100644 index d60371b..0000000 --- a/lib/stb_image.h +++ /dev/null @@ -1,7897 +0,0 @@ -/* stb_image - v2.27 - public domain image loader - http://nothings.org/stb - no warranty implied; use at your own risk - - Do this: - #define STB_IMAGE_IMPLEMENTATION - before you include this file in *one* C or C++ file to create the implementation. - - // i.e. it should look like this: - #include ... - #include ... - #include ... - #define STB_IMAGE_IMPLEMENTATION - #include "stb_image.h" - - You can #define STBI_ASSERT(x) before the #include to avoid using assert.h. - And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using malloc,realloc,free - - - QUICK NOTES: - Primarily of interest to game developers and other people who can - avoid problematic images and only need the trivial interface - - JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib) - PNG 1/2/4/8/16-bit-per-channel - - TGA (not sure what subset, if a subset) - BMP non-1bpp, non-RLE - PSD (composited view only, no extra channels, 8/16 bit-per-channel) - - GIF (*comp always reports as 4-channel) - HDR (radiance rgbE format) - PIC (Softimage PIC) - PNM (PPM and PGM binary only) - - Animated GIF still needs a proper API, but here's one way to do it: - http://gist.github.com/urraka/685d9a6340b26b830d49 - - - decode from memory or through FILE (define STBI_NO_STDIO to remove code) - - decode from arbitrary I/O callbacks - - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON) - - Full documentation under "DOCUMENTATION" below. - - -LICENSE - - See end of file for license information. - -RECENT REVISION HISTORY: - - 2.27 (2021-07-11) document stbi_info better, 16-bit PNM support, bug fixes - 2.26 (2020-07-13) many minor fixes - 2.25 (2020-02-02) fix warnings - 2.24 (2020-02-02) fix warnings; thread-local failure_reason and flip_vertically - 2.23 (2019-08-11) fix clang static analysis warning - 2.22 (2019-03-04) gif fixes, fix warnings - 2.21 (2019-02-25) fix typo in comment - 2.20 (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs - 2.19 (2018-02-11) fix warning - 2.18 (2018-01-30) fix warnings - 2.17 (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings - 2.16 (2017-07-23) all functions have 16-bit variants; optimizations; bugfixes - 2.15 (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE detection on GCC - 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs - 2.13 (2016-12-04) experimental 16-bit API, only for PNG so far; fixes - 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes - 2.11 (2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64 - RGB-format JPEG; remove white matting in PSD; - allocate large structures on the stack; - correct channel count for PNG & BMP - 2.10 (2016-01-22) avoid warning introduced in 2.09 - 2.09 (2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED - - See end of file for full revision history. - - - ============================ Contributors ========================= - - Image formats Extensions, features - Sean Barrett (jpeg, png, bmp) Jetro Lauha (stbi_info) - Nicolas Schulz (hdr, psd) Martin "SpartanJ" Golini (stbi_info) - Jonathan Dummer (tga) James "moose2000" Brown (iPhone PNG) - Jean-Marc Lienher (gif) Ben "Disch" Wenger (io callbacks) - Tom Seddon (pic) Omar Cornut (1/2/4-bit PNG) - Thatcher Ulrich (psd) Nicolas Guillemot (vertical flip) - Ken Miller (pgm, ppm) Richard Mitton (16-bit PSD) - github:urraka (animated gif) Junggon Kim (PNM comments) - Christopher Forseth (animated gif) Daniel Gibson (16-bit TGA) - socks-the-fox (16-bit PNG) - Jeremy Sawicki (handle all ImageNet JPGs) - Optimizations & bugfixes Mikhail Morozov (1-bit BMP) - Fabian "ryg" Giesen Anael Seghezzi (is-16-bit query) - Arseny Kapoulkine Simon Breuss (16-bit PNM) - John-Mark Allen - Carmelo J Fdez-Aguera - - Bug & warning fixes - Marc LeBlanc David Woo Guillaume George Martins Mozeiko - Christpher Lloyd Jerry Jansson Joseph Thomson Blazej Dariusz Roszkowski - Phil Jordan Dave Moore Roy Eltham - Hayaki Saito Nathan Reed Won Chun - Luke Graham Johan Duparc Nick Verigakis the Horde3D community - Thomas Ruf Ronny Chevalier github:rlyeh - Janez Zemva John Bartholomew Michal Cichon github:romigrou - Jonathan Blow Ken Hamada Tero Hanninen github:svdijk - Eugene Golushkov Laurent Gomila Cort Stratton github:snagar - Aruelien Pocheville Sergio Gonzalez Thibault Reuille github:Zelex - Cass Everitt Ryamond Barbiero github:grim210 - Paul Du Bois Engin Manap Aldo Culquicondor github:sammyhw - Philipp Wiesemann Dale Weiler Oriol Ferrer Mesia github:phprus - Josh Tobin Matthew Gregan github:poppolopoppo - Julian Raschke Gregory Mullen Christian Floisand github:darealshinji - Baldur Karlsson Kevin Schmidt JR Smith github:Michaelangel007 - Brad Weinberger Matvey Cherevko github:mosra - Luca Sas Alexander Veselov Zack Middleton [reserved] - Ryan C. Gordon [reserved] [reserved] - DO NOT ADD YOUR NAME HERE - - Jacko Dirks - - To add your name to the credits, pick a random blank space in the middle and fill it. - 80% of merge conflicts on stb PRs are due to people adding their name at the end - of the credits. -*/ - -#ifndef STBI_INCLUDE_STB_IMAGE_H -#define STBI_INCLUDE_STB_IMAGE_H - -// DOCUMENTATION -// -// Limitations: -// - no 12-bit-per-channel JPEG -// - no JPEGs with arithmetic coding -// - GIF always returns *comp=4 -// -// Basic usage (see HDR discussion below for HDR usage): -// int x,y,n; -// unsigned char *data = stbi_load(filename, &x, &y, &n, 0); -// // ... process data if not NULL ... -// // ... x = width, y = height, n = # 8-bit components per pixel ... -// // ... replace '0' with '1'..'4' to force that many components per pixel -// // ... but 'n' will always be the number that it would have been if you said 0 -// stbi_image_free(data) -// -// Standard parameters: -// int *x -- outputs image width in pixels -// int *y -- outputs image height in pixels -// int *channels_in_file -- outputs # of image components in image file -// int desired_channels -- if non-zero, # of image components requested in result -// -// The return value from an image loader is an 'unsigned char *' which points -// to the pixel data, or NULL on an allocation failure or if the image is -// corrupt or invalid. The pixel data consists of *y scanlines of *x pixels, -// with each pixel consisting of N interleaved 8-bit components; the first -// pixel pointed to is top-left-most in the image. There is no padding between -// image scanlines or between pixels, regardless of format. The number of -// components N is 'desired_channels' if desired_channels is non-zero, or -// *channels_in_file otherwise. If desired_channels is non-zero, -// *channels_in_file has the number of components that _would_ have been -// output otherwise. E.g. if you set desired_channels to 4, you will always -// get RGBA output, but you can check *channels_in_file to see if it's trivially -// opaque because e.g. there were only 3 channels in the source image. -// -// An output image with N components has the following components interleaved -// in this order in each pixel: -// -// N=#comp components -// 1 grey -// 2 grey, alpha -// 3 red, green, blue -// 4 red, green, blue, alpha -// -// If image loading fails for any reason, the return value will be NULL, -// and *x, *y, *channels_in_file will be unchanged. The function -// stbi_failure_reason() can be queried for an extremely brief, end-user -// unfriendly explanation of why the load failed. Define STBI_NO_FAILURE_STRINGS -// to avoid compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly -// more user-friendly ones. -// -// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized. -// -// To query the width, height and component count of an image without having to -// decode the full file, you can use the stbi_info family of functions: -// -// int x,y,n,ok; -// ok = stbi_info(filename, &x, &y, &n); -// // returns ok=1 and sets x, y, n if image is a supported format, -// // 0 otherwise. -// -// Note that stb_image pervasively uses ints in its public API for sizes, -// including sizes of memory buffers. This is now part of the API and thus -// hard to change without causing breakage. As a result, the various image -// loaders all have certain limits on image size; these differ somewhat -// by format but generally boil down to either just under 2GB or just under -// 1GB. When the decoded image would be larger than this, stb_image decoding -// will fail. -// -// Additionally, stb_image will reject image files that have any of their -// dimensions set to a larger value than the configurable STBI_MAX_DIMENSIONS, -// which defaults to 2**24 = 16777216 pixels. Due to the above memory limit, -// the only way to have an image with such dimensions load correctly -// is for it to have a rather extreme aspect ratio. Either way, the -// assumption here is that such larger images are likely to be malformed -// or malicious. If you do need to load an image with individual dimensions -// larger than that, and it still fits in the overall size limit, you can -// #define STBI_MAX_DIMENSIONS on your own to be something larger. -// -// =========================================================================== -// -// UNICODE: -// -// If compiling for Windows and you wish to use Unicode filenames, compile -// with -// #define STBI_WINDOWS_UTF8 -// and pass utf8-encoded filenames. Call stbi_convert_wchar_to_utf8 to convert -// Windows wchar_t filenames to utf8. -// -// =========================================================================== -// -// Philosophy -// -// stb libraries are designed with the following priorities: -// -// 1. easy to use -// 2. easy to maintain -// 3. good performance -// -// Sometimes I let "good performance" creep up in priority over "easy to maintain", -// and for best performance I may provide less-easy-to-use APIs that give higher -// performance, in addition to the easy-to-use ones. Nevertheless, it's important -// to keep in mind that from the standpoint of you, a client of this library, -// all you care about is #1 and #3, and stb libraries DO NOT emphasize #3 above all. -// -// Some secondary priorities arise directly from the first two, some of which -// provide more explicit reasons why performance can't be emphasized. -// -// - Portable ("ease of use") -// - Small source code footprint ("easy to maintain") -// - No dependencies ("ease of use") -// -// =========================================================================== -// -// I/O callbacks -// -// I/O callbacks allow you to read from arbitrary sources, like packaged -// files or some other source. Data read from callbacks are processed -// through a small internal buffer (currently 128 bytes) to try to reduce -// overhead. -// -// The three functions you must define are "read" (reads some bytes of data), -// "skip" (skips some bytes of data), "eof" (reports if the stream is at the end). -// -// =========================================================================== -// -// SIMD support -// -// The JPEG decoder will try to automatically use SIMD kernels on x86 when -// supported by the compiler. For ARM Neon support, you must explicitly -// request it. -// -// (The old do-it-yourself SIMD API is no longer supported in the current -// code.) -// -// On x86, SSE2 will automatically be used when available based on a run-time -// test; if not, the generic C versions are used as a fall-back. On ARM targets, -// the typical path is to have separate builds for NEON and non-NEON devices -// (at least this is true for iOS and Android). Therefore, the NEON support is -// toggled by a build flag: define STBI_NEON to get NEON loops. -// -// If for some reason you do not want to use any of SIMD code, or if -// you have issues compiling it, you can disable it entirely by -// defining STBI_NO_SIMD. -// -// =========================================================================== -// -// HDR image support (disable by defining STBI_NO_HDR) -// -// stb_image supports loading HDR images in general, and currently the Radiance -// .HDR file format specifically. You can still load any file through the existing -// interface; if you attempt to load an HDR file, it will be automatically remapped -// to LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1; -// both of these constants can be reconfigured through this interface: -// -// stbi_hdr_to_ldr_gamma(2.2f); -// stbi_hdr_to_ldr_scale(1.0f); -// -// (note, do not use _inverse_ constants; stbi_image will invert them -// appropriately). -// -// Additionally, there is a new, parallel interface for loading files as -// (linear) floats to preserve the full dynamic range: -// -// float *data = stbi_loadf(filename, &x, &y, &n, 0); -// -// If you load LDR images through this interface, those images will -// be promoted to floating point values, run through the inverse of -// constants corresponding to the above: -// -// stbi_ldr_to_hdr_scale(1.0f); -// stbi_ldr_to_hdr_gamma(2.2f); -// -// Finally, given a filename (or an open file or memory block--see header -// file for details) containing image data, you can query for the "most -// appropriate" interface to use (that is, whether the image is HDR or -// not), using: -// -// stbi_is_hdr(char *filename); -// -// =========================================================================== -// -// iPhone PNG support: -// -// We optionally support converting iPhone-formatted PNGs (which store -// premultiplied BGRA) back to RGB, even though they're internally encoded -// differently. To enable this conversion, call -// stbi_convert_iphone_png_to_rgb(1). -// -// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per -// pixel to remove any premultiplied alpha *only* if the image file explicitly -// says there's premultiplied data (currently only happens in iPhone images, -// and only if iPhone convert-to-rgb processing is on). -// -// =========================================================================== -// -// ADDITIONAL CONFIGURATION -// -// - You can suppress implementation of any of the decoders to reduce -// your code footprint by #defining one or more of the following -// symbols before creating the implementation. -// -// STBI_NO_JPEG -// STBI_NO_PNG -// STBI_NO_BMP -// STBI_NO_PSD -// STBI_NO_TGA -// STBI_NO_GIF -// STBI_NO_HDR -// STBI_NO_PIC -// STBI_NO_PNM (.ppm and .pgm) -// -// - You can request *only* certain decoders and suppress all other ones -// (this will be more forward-compatible, as addition of new decoders -// doesn't require you to disable them explicitly): -// -// STBI_ONLY_JPEG -// STBI_ONLY_PNG -// STBI_ONLY_BMP -// STBI_ONLY_PSD -// STBI_ONLY_TGA -// STBI_ONLY_GIF -// STBI_ONLY_HDR -// STBI_ONLY_PIC -// STBI_ONLY_PNM (.ppm and .pgm) -// -// - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still -// want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB -// -// - If you define STBI_MAX_DIMENSIONS, stb_image will reject images greater -// than that size (in either width or height) without further processing. -// This is to let programs in the wild set an upper bound to prevent -// denial-of-service attacks on untrusted data, as one could generate a -// valid image of gigantic dimensions and force stb_image to allocate a -// huge block of memory and spend disproportionate time decoding it. By -// default this is set to (1 << 24), which is 16777216, but that's still -// very big. - -#ifndef STBI_NO_STDIO -#include -#endif // STBI_NO_STDIO - -#define STBI_VERSION 1 - -enum -{ - STBI_default = 0, // only used for desired_channels - - STBI_grey = 1, - STBI_grey_alpha = 2, - STBI_rgb = 3, - STBI_rgb_alpha = 4 -}; - -#include -typedef unsigned char stbi_uc; -typedef unsigned short stbi_us; - -#ifdef __cplusplus -extern "C" { -#endif - -#ifndef STBIDEF -#ifdef STB_IMAGE_STATIC -#define STBIDEF static -#else -#define STBIDEF extern -#endif -#endif - -////////////////////////////////////////////////////////////////////////////// -// -// PRIMARY API - works on images of any type -// - -// -// load image by filename, open file, or memory buffer -// - -typedef struct -{ - int (*read) (void *user,char *data,int size); // fill 'data' with 'size' bytes. return number of bytes actually read - void (*skip) (void *user,int n); // skip the next 'n' bytes, or 'unget' the last -n bytes if negative - int (*eof) (void *user); // returns nonzero if we are at end of file/data -} stbi_io_callbacks; - -//////////////////////////////////// -// -// 8-bits-per-channel interface -// - -STBIDEF stbi_uc *stbi_load_from_memory (stbi_uc const *buffer, int len , int *x, int *y, int *channels_in_file, int desired_channels); -STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk , void *user, int *x, int *y, int *channels_in_file, int desired_channels); - -#ifndef STBI_NO_STDIO -STBIDEF stbi_uc *stbi_load (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels); -STBIDEF stbi_uc *stbi_load_from_file (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels); -// for stbi_load_from_file, file pointer is left pointing immediately after image -#endif - -#ifndef STBI_NO_GIF -STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp); -#endif - -#ifdef STBI_WINDOWS_UTF8 -STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input); -#endif - -//////////////////////////////////// -// -// 16-bits-per-channel interface -// - -STBIDEF stbi_us *stbi_load_16_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels); -STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels); - -#ifndef STBI_NO_STDIO -STBIDEF stbi_us *stbi_load_16 (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels); -STBIDEF stbi_us *stbi_load_from_file_16(FILE *f, int *x, int *y, int *channels_in_file, int desired_channels); -#endif - -//////////////////////////////////// -// -// float-per-channel interface -// -#ifndef STBI_NO_LINEAR - STBIDEF float *stbi_loadf_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels); - STBIDEF float *stbi_loadf_from_callbacks (stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels); - - #ifndef STBI_NO_STDIO - STBIDEF float *stbi_loadf (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels); - STBIDEF float *stbi_loadf_from_file (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels); - #endif -#endif - -#ifndef STBI_NO_HDR - STBIDEF void stbi_hdr_to_ldr_gamma(float gamma); - STBIDEF void stbi_hdr_to_ldr_scale(float scale); -#endif // STBI_NO_HDR - -#ifndef STBI_NO_LINEAR - STBIDEF void stbi_ldr_to_hdr_gamma(float gamma); - STBIDEF void stbi_ldr_to_hdr_scale(float scale); -#endif // STBI_NO_LINEAR - -// stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR -STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user); -STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len); -#ifndef STBI_NO_STDIO -STBIDEF int stbi_is_hdr (char const *filename); -STBIDEF int stbi_is_hdr_from_file(FILE *f); -#endif // STBI_NO_STDIO - - -// get a VERY brief reason for failure -// on most compilers (and ALL modern mainstream compilers) this is threadsafe -STBIDEF const char *stbi_failure_reason (void); - -// free the loaded image -- this is just free() -STBIDEF void stbi_image_free (void *retval_from_stbi_load); - -// get image dimensions & components without fully decoding -STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp); -STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp); -STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len); -STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *clbk, void *user); - -#ifndef STBI_NO_STDIO -STBIDEF int stbi_info (char const *filename, int *x, int *y, int *comp); -STBIDEF int stbi_info_from_file (FILE *f, int *x, int *y, int *comp); -STBIDEF int stbi_is_16_bit (char const *filename); -STBIDEF int stbi_is_16_bit_from_file(FILE *f); -#endif - - - -// for image formats that explicitly notate that they have premultiplied alpha, -// we just return the colors as stored in the file. set this flag to force -// unpremultiplication. results are undefined if the unpremultiply overflow. -STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply); - -// indicate whether we should process iphone images back to canonical format, -// or just pass them through "as-is" -STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert); - -// flip the image vertically, so the first pixel in the output array is the bottom left -STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip); - -// as above, but only applies to images loaded on the thread that calls the function -// this function is only available if your compiler supports thread-local variables; -// calling it will fail to link if your compiler doesn't -STBIDEF void stbi_set_unpremultiply_on_load_thread(int flag_true_if_should_unpremultiply); -STBIDEF void stbi_convert_iphone_png_to_rgb_thread(int flag_true_if_should_convert); -STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip); - -// ZLIB client - used by PNG, available for other purposes - -STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen); -STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header); -STBIDEF char *stbi_zlib_decode_malloc(const char *buffer, int len, int *outlen); -STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, const char *ibuffer, int ilen); - -STBIDEF char *stbi_zlib_decode_noheader_malloc(const char *buffer, int len, int *outlen); -STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen); - - -#ifdef __cplusplus -} -#endif - -// -// -//// end header file ///////////////////////////////////////////////////// -#endif // STBI_INCLUDE_STB_IMAGE_H - -#ifdef STB_IMAGE_IMPLEMENTATION - -#if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) \ - || defined(STBI_ONLY_TGA) || defined(STBI_ONLY_GIF) || defined(STBI_ONLY_PSD) \ - || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || defined(STBI_ONLY_PNM) \ - || defined(STBI_ONLY_ZLIB) - #ifndef STBI_ONLY_JPEG - #define STBI_NO_JPEG - #endif - #ifndef STBI_ONLY_PNG - #define STBI_NO_PNG - #endif - #ifndef STBI_ONLY_BMP - #define STBI_NO_BMP - #endif - #ifndef STBI_ONLY_PSD - #define STBI_NO_PSD - #endif - #ifndef STBI_ONLY_TGA - #define STBI_NO_TGA - #endif - #ifndef STBI_ONLY_GIF - #define STBI_NO_GIF - #endif - #ifndef STBI_ONLY_HDR - #define STBI_NO_HDR - #endif - #ifndef STBI_ONLY_PIC - #define STBI_NO_PIC - #endif - #ifndef STBI_ONLY_PNM - #define STBI_NO_PNM - #endif -#endif - -#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB) -#define STBI_NO_ZLIB -#endif - - -#include -#include // ptrdiff_t on osx -#include -#include -#include - -#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) -#include // ldexp, pow -#endif - -#ifndef STBI_NO_STDIO -#include -#endif - -#ifndef STBI_ASSERT -#include -#define STBI_ASSERT(x) assert(x) -#endif - -#ifdef __cplusplus -#define STBI_EXTERN extern "C" -#else -#define STBI_EXTERN extern -#endif - - -#ifndef _MSC_VER - #ifdef __cplusplus - #define stbi_inline inline - #else - #define stbi_inline - #endif -#else - #define stbi_inline __forceinline -#endif - -#ifndef STBI_NO_THREAD_LOCALS - #if defined(__cplusplus) && __cplusplus >= 201103L - #define STBI_THREAD_LOCAL thread_local - #elif defined(__GNUC__) && __GNUC__ < 5 - #define STBI_THREAD_LOCAL __thread - #elif defined(_MSC_VER) - #define STBI_THREAD_LOCAL __declspec(thread) - #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L && !defined(__STDC_NO_THREADS__) - #define STBI_THREAD_LOCAL _Thread_local - #endif - - #ifndef STBI_THREAD_LOCAL - #if defined(__GNUC__) - #define STBI_THREAD_LOCAL __thread - #endif - #endif -#endif - -#ifdef _MSC_VER -typedef unsigned short stbi__uint16; -typedef signed short stbi__int16; -typedef unsigned int stbi__uint32; -typedef signed int stbi__int32; -#else -#include -typedef uint16_t stbi__uint16; -typedef int16_t stbi__int16; -typedef uint32_t stbi__uint32; -typedef int32_t stbi__int32; -#endif - -// should produce compiler error if size is wrong -typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1]; - -#ifdef _MSC_VER -#define STBI_NOTUSED(v) (void)(v) -#else -#define STBI_NOTUSED(v) (void)sizeof(v) -#endif - -#ifdef _MSC_VER -#define STBI_HAS_LROTL -#endif - -#ifdef STBI_HAS_LROTL - #define stbi_lrot(x,y) _lrotl(x,y) -#else - #define stbi_lrot(x,y) (((x) << (y)) | ((x) >> (-(y) & 31))) -#endif - -#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED)) -// ok -#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED) -// ok -#else -#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)." -#endif - -#ifndef STBI_MALLOC -#define STBI_MALLOC(sz) malloc(sz) -#define STBI_REALLOC(p,newsz) realloc(p,newsz) -#define STBI_FREE(p) free(p) -#endif - -#ifndef STBI_REALLOC_SIZED -#define STBI_REALLOC_SIZED(p,oldsz,newsz) STBI_REALLOC(p,newsz) -#endif - -// x86/x64 detection -#if defined(__x86_64__) || defined(_M_X64) -#define STBI__X64_TARGET -#elif defined(__i386) || defined(_M_IX86) -#define STBI__X86_TARGET -#endif - -#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) && !defined(STBI_NO_SIMD) -// gcc doesn't support sse2 intrinsics unless you compile with -msse2, -// which in turn means it gets to use SSE2 everywhere. This is unfortunate, -// but previous attempts to provide the SSE2 functions with runtime -// detection caused numerous issues. The way architecture extensions are -// exposed in GCC/Clang is, sadly, not really suited for one-file libs. -// New behavior: if compiled with -msse2, we use SSE2 without any -// detection; if not, we don't use it at all. -#define STBI_NO_SIMD -#endif - -#if defined(__MINGW32__) && defined(STBI__X86_TARGET) && !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD) -// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid STBI__X64_TARGET -// -// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the -// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant. -// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not -// simultaneously enabling "-mstackrealign". -// -// See https://github.com/nothings/stb/issues/81 for more information. -// -// So default to no SSE2 on 32-bit MinGW. If you've read this far and added -// -mstackrealign to your build settings, feel free to #define STBI_MINGW_ENABLE_SSE2. -#define STBI_NO_SIMD -#endif - -#if !defined(STBI_NO_SIMD) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET)) -#define STBI_SSE2 -#include - -#ifdef _MSC_VER - -#if _MSC_VER >= 1400 // not VC6 -#include // __cpuid -static int stbi__cpuid3(void) -{ - int info[4]; - __cpuid(info,1); - return info[3]; -} -#else -static int stbi__cpuid3(void) -{ - int res; - __asm { - mov eax,1 - cpuid - mov res,edx - } - return res; -} -#endif - -#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name - -#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2) -static int stbi__sse2_available(void) -{ - int info3 = stbi__cpuid3(); - return ((info3 >> 26) & 1) != 0; -} -#endif - -#else // assume GCC-style if not VC++ -#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) - -#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2) -static int stbi__sse2_available(void) -{ - // If we're even attempting to compile this on GCC/Clang, that means - // -msse2 is on, which means the compiler is allowed to use SSE2 - // instructions at will, and so are we. - return 1; -} -#endif - -#endif -#endif - -// ARM NEON -#if defined(STBI_NO_SIMD) && defined(STBI_NEON) -#undef STBI_NEON -#endif - -#ifdef STBI_NEON -#include -#ifdef _MSC_VER -#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name -#else -#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) -#endif -#endif - -#ifndef STBI_SIMD_ALIGN -#define STBI_SIMD_ALIGN(type, name) type name -#endif - -#ifndef STBI_MAX_DIMENSIONS -#define STBI_MAX_DIMENSIONS (1 << 24) -#endif - -/////////////////////////////////////////////// -// -// stbi__context struct and start_xxx functions - -// stbi__context structure is our basic context used by all images, so it -// contains all the IO context, plus some basic image information -typedef struct -{ - stbi__uint32 img_x, img_y; - int img_n, img_out_n; - - stbi_io_callbacks io; - void *io_user_data; - - int read_from_callbacks; - int buflen; - stbi_uc buffer_start[128]; - int callback_already_read; - - stbi_uc *img_buffer, *img_buffer_end; - stbi_uc *img_buffer_original, *img_buffer_original_end; -} stbi__context; - - -static void stbi__refill_buffer(stbi__context *s); - -// initialize a memory-decode context -static void stbi__start_mem(stbi__context *s, stbi_uc const *buffer, int len) -{ - s->io.read = NULL; - s->read_from_callbacks = 0; - s->callback_already_read = 0; - s->img_buffer = s->img_buffer_original = (stbi_uc *) buffer; - s->img_buffer_end = s->img_buffer_original_end = (stbi_uc *) buffer+len; -} - -// initialize a callback-based context -static void stbi__start_callbacks(stbi__context *s, stbi_io_callbacks *c, void *user) -{ - s->io = *c; - s->io_user_data = user; - s->buflen = sizeof(s->buffer_start); - s->read_from_callbacks = 1; - s->callback_already_read = 0; - s->img_buffer = s->img_buffer_original = s->buffer_start; - stbi__refill_buffer(s); - s->img_buffer_original_end = s->img_buffer_end; -} - -#ifndef STBI_NO_STDIO - -static int stbi__stdio_read(void *user, char *data, int size) -{ - return (int) fread(data,1,size,(FILE*) user); -} - -static void stbi__stdio_skip(void *user, int n) -{ - int ch; - fseek((FILE*) user, n, SEEK_CUR); - ch = fgetc((FILE*) user); /* have to read a byte to reset feof()'s flag */ - if (ch != EOF) { - ungetc(ch, (FILE *) user); /* push byte back onto stream if valid. */ - } -} - -static int stbi__stdio_eof(void *user) -{ - return feof((FILE*) user) || ferror((FILE *) user); -} - -static stbi_io_callbacks stbi__stdio_callbacks = -{ - stbi__stdio_read, - stbi__stdio_skip, - stbi__stdio_eof, -}; - -static void stbi__start_file(stbi__context *s, FILE *f) -{ - stbi__start_callbacks(s, &stbi__stdio_callbacks, (void *) f); -} - -//static void stop_file(stbi__context *s) { } - -#endif // !STBI_NO_STDIO - -static void stbi__rewind(stbi__context *s) -{ - // conceptually rewind SHOULD rewind to the beginning of the stream, - // but we just rewind to the beginning of the initial buffer, because - // we only use it after doing 'test', which only ever looks at at most 92 bytes - s->img_buffer = s->img_buffer_original; - s->img_buffer_end = s->img_buffer_original_end; -} - -enum -{ - STBI_ORDER_RGB, - STBI_ORDER_BGR -}; - -typedef struct -{ - int bits_per_channel; - int num_channels; - int channel_order; -} stbi__result_info; - -#ifndef STBI_NO_JPEG -static int stbi__jpeg_test(stbi__context *s); -static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); -static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp); -#endif - -#ifndef STBI_NO_PNG -static int stbi__png_test(stbi__context *s); -static void *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); -static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp); -static int stbi__png_is16(stbi__context *s); -#endif - -#ifndef STBI_NO_BMP -static int stbi__bmp_test(stbi__context *s); -static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); -static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp); -#endif - -#ifndef STBI_NO_TGA -static int stbi__tga_test(stbi__context *s); -static void *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); -static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp); -#endif - -#ifndef STBI_NO_PSD -static int stbi__psd_test(stbi__context *s); -static void *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc); -static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp); -static int stbi__psd_is16(stbi__context *s); -#endif - -#ifndef STBI_NO_HDR -static int stbi__hdr_test(stbi__context *s); -static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); -static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp); -#endif - -#ifndef STBI_NO_PIC -static int stbi__pic_test(stbi__context *s); -static void *stbi__pic_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); -static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp); -#endif - -#ifndef STBI_NO_GIF -static int stbi__gif_test(stbi__context *s); -static void *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); -static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp); -static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp); -#endif - -#ifndef STBI_NO_PNM -static int stbi__pnm_test(stbi__context *s); -static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); -static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp); -static int stbi__pnm_is16(stbi__context *s); -#endif - -static -#ifdef STBI_THREAD_LOCAL -STBI_THREAD_LOCAL -#endif -const char *stbi__g_failure_reason; - -STBIDEF const char *stbi_failure_reason(void) -{ - return stbi__g_failure_reason; -} - -#ifndef STBI_NO_FAILURE_STRINGS -static int stbi__err(const char *str) -{ - stbi__g_failure_reason = str; - return 0; -} -#endif - -static void *stbi__malloc(size_t size) -{ - return STBI_MALLOC(size); -} - -// stb_image uses ints pervasively, including for offset calculations. -// therefore the largest decoded image size we can support with the -// current code, even on 64-bit targets, is INT_MAX. this is not a -// significant limitation for the intended use case. -// -// we do, however, need to make sure our size calculations don't -// overflow. hence a few helper functions for size calculations that -// multiply integers together, making sure that they're non-negative -// and no overflow occurs. - -// return 1 if the sum is valid, 0 on overflow. -// negative terms are considered invalid. -static int stbi__addsizes_valid(int a, int b) -{ - if (b < 0) return 0; - // now 0 <= b <= INT_MAX, hence also - // 0 <= INT_MAX - b <= INTMAX. - // And "a + b <= INT_MAX" (which might overflow) is the - // same as a <= INT_MAX - b (no overflow) - return a <= INT_MAX - b; -} - -// returns 1 if the product is valid, 0 on overflow. -// negative factors are considered invalid. -static int stbi__mul2sizes_valid(int a, int b) -{ - if (a < 0 || b < 0) return 0; - if (b == 0) return 1; // mul-by-0 is always safe - // portable way to check for no overflows in a*b - return a <= INT_MAX/b; -} - -#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR) -// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow -static int stbi__mad2sizes_valid(int a, int b, int add) -{ - return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a*b, add); -} -#endif - -// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow -static int stbi__mad3sizes_valid(int a, int b, int c, int add) -{ - return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) && - stbi__addsizes_valid(a*b*c, add); -} - -// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow -#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) || !defined(STBI_NO_PNM) -static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add) -{ - return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) && - stbi__mul2sizes_valid(a*b*c, d) && stbi__addsizes_valid(a*b*c*d, add); -} -#endif - -#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR) -// mallocs with size overflow checking -static void *stbi__malloc_mad2(int a, int b, int add) -{ - if (!stbi__mad2sizes_valid(a, b, add)) return NULL; - return stbi__malloc(a*b + add); -} -#endif - -static void *stbi__malloc_mad3(int a, int b, int c, int add) -{ - if (!stbi__mad3sizes_valid(a, b, c, add)) return NULL; - return stbi__malloc(a*b*c + add); -} - -#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) || !defined(STBI_NO_PNM) -static void *stbi__malloc_mad4(int a, int b, int c, int d, int add) -{ - if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL; - return stbi__malloc(a*b*c*d + add); -} -#endif - -// stbi__err - error -// stbi__errpf - error returning pointer to float -// stbi__errpuc - error returning pointer to unsigned char - -#ifdef STBI_NO_FAILURE_STRINGS - #define stbi__err(x,y) 0 -#elif defined(STBI_FAILURE_USERMSG) - #define stbi__err(x,y) stbi__err(y) -#else - #define stbi__err(x,y) stbi__err(x) -#endif - -#define stbi__errpf(x,y) ((float *)(size_t) (stbi__err(x,y)?NULL:NULL)) -#define stbi__errpuc(x,y) ((unsigned char *)(size_t) (stbi__err(x,y)?NULL:NULL)) - -STBIDEF void stbi_image_free(void *retval_from_stbi_load) -{ - STBI_FREE(retval_from_stbi_load); -} - -#ifndef STBI_NO_LINEAR -static float *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp); -#endif - -#ifndef STBI_NO_HDR -static stbi_uc *stbi__hdr_to_ldr(float *data, int x, int y, int comp); -#endif - -static int stbi__vertically_flip_on_load_global = 0; - -STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip) -{ - stbi__vertically_flip_on_load_global = flag_true_if_should_flip; -} - -#ifndef STBI_THREAD_LOCAL -#define stbi__vertically_flip_on_load stbi__vertically_flip_on_load_global -#else -static STBI_THREAD_LOCAL int stbi__vertically_flip_on_load_local, stbi__vertically_flip_on_load_set; - -STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip) -{ - stbi__vertically_flip_on_load_local = flag_true_if_should_flip; - stbi__vertically_flip_on_load_set = 1; -} - -#define stbi__vertically_flip_on_load (stbi__vertically_flip_on_load_set \ - ? stbi__vertically_flip_on_load_local \ - : stbi__vertically_flip_on_load_global) -#endif // STBI_THREAD_LOCAL - -static void *stbi__load_main(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc) -{ - memset(ri, 0, sizeof(*ri)); // make sure it's initialized if we add new fields - ri->bits_per_channel = 8; // default is 8 so most paths don't have to be changed - ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order - ri->num_channels = 0; - - // test the formats with a very explicit header first (at least a FOURCC - // or distinctive magic number first) - #ifndef STBI_NO_PNG - if (stbi__png_test(s)) return stbi__png_load(s,x,y,comp,req_comp, ri); - #endif - #ifndef STBI_NO_BMP - if (stbi__bmp_test(s)) return stbi__bmp_load(s,x,y,comp,req_comp, ri); - #endif - #ifndef STBI_NO_GIF - if (stbi__gif_test(s)) return stbi__gif_load(s,x,y,comp,req_comp, ri); - #endif - #ifndef STBI_NO_PSD - if (stbi__psd_test(s)) return stbi__psd_load(s,x,y,comp,req_comp, ri, bpc); - #else - STBI_NOTUSED(bpc); - #endif - #ifndef STBI_NO_PIC - if (stbi__pic_test(s)) return stbi__pic_load(s,x,y,comp,req_comp, ri); - #endif - - // then the formats that can end up attempting to load with just 1 or 2 - // bytes matching expectations; these are prone to false positives, so - // try them later - #ifndef STBI_NO_JPEG - if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp, ri); - #endif - #ifndef STBI_NO_PNM - if (stbi__pnm_test(s)) return stbi__pnm_load(s,x,y,comp,req_comp, ri); - #endif - - #ifndef STBI_NO_HDR - if (stbi__hdr_test(s)) { - float *hdr = stbi__hdr_load(s, x,y,comp,req_comp, ri); - return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp); - } - #endif - - #ifndef STBI_NO_TGA - // test tga last because it's a crappy test! - if (stbi__tga_test(s)) - return stbi__tga_load(s,x,y,comp,req_comp, ri); - #endif - - return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt"); -} - -static stbi_uc *stbi__convert_16_to_8(stbi__uint16 *orig, int w, int h, int channels) -{ - int i; - int img_len = w * h * channels; - stbi_uc *reduced; - - reduced = (stbi_uc *) stbi__malloc(img_len); - if (reduced == NULL) return stbi__errpuc("outofmem", "Out of memory"); - - for (i = 0; i < img_len; ++i) - reduced[i] = (stbi_uc)((orig[i] >> 8) & 0xFF); // top half of each byte is sufficient approx of 16->8 bit scaling - - STBI_FREE(orig); - return reduced; -} - -static stbi__uint16 *stbi__convert_8_to_16(stbi_uc *orig, int w, int h, int channels) -{ - int i; - int img_len = w * h * channels; - stbi__uint16 *enlarged; - - enlarged = (stbi__uint16 *) stbi__malloc(img_len*2); - if (enlarged == NULL) return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory"); - - for (i = 0; i < img_len; ++i) - enlarged[i] = (stbi__uint16)((orig[i] << 8) + orig[i]); // replicate to high and low byte, maps 0->0, 255->0xffff - - STBI_FREE(orig); - return enlarged; -} - -static void stbi__vertical_flip(void *image, int w, int h, int bytes_per_pixel) -{ - int row; - size_t bytes_per_row = (size_t)w * bytes_per_pixel; - stbi_uc temp[2048]; - stbi_uc *bytes = (stbi_uc *)image; - - for (row = 0; row < (h>>1); row++) { - stbi_uc *row0 = bytes + row*bytes_per_row; - stbi_uc *row1 = bytes + (h - row - 1)*bytes_per_row; - // swap row0 with row1 - size_t bytes_left = bytes_per_row; - while (bytes_left) { - size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp); - memcpy(temp, row0, bytes_copy); - memcpy(row0, row1, bytes_copy); - memcpy(row1, temp, bytes_copy); - row0 += bytes_copy; - row1 += bytes_copy; - bytes_left -= bytes_copy; - } - } -} - -#ifndef STBI_NO_GIF -static void stbi__vertical_flip_slices(void *image, int w, int h, int z, int bytes_per_pixel) -{ - int slice; - int slice_size = w * h * bytes_per_pixel; - - stbi_uc *bytes = (stbi_uc *)image; - for (slice = 0; slice < z; ++slice) { - stbi__vertical_flip(bytes, w, h, bytes_per_pixel); - bytes += slice_size; - } -} -#endif - -static unsigned char *stbi__load_and_postprocess_8bit(stbi__context *s, int *x, int *y, int *comp, int req_comp) -{ - stbi__result_info ri; - void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8); - - if (result == NULL) - return NULL; - - // it is the responsibility of the loaders to make sure we get either 8 or 16 bit. - STBI_ASSERT(ri.bits_per_channel == 8 || ri.bits_per_channel == 16); - - if (ri.bits_per_channel != 8) { - result = stbi__convert_16_to_8((stbi__uint16 *) result, *x, *y, req_comp == 0 ? *comp : req_comp); - ri.bits_per_channel = 8; - } - - // @TODO: move stbi__convert_format to here - - if (stbi__vertically_flip_on_load) { - int channels = req_comp ? req_comp : *comp; - stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi_uc)); - } - - return (unsigned char *) result; -} - -static stbi__uint16 *stbi__load_and_postprocess_16bit(stbi__context *s, int *x, int *y, int *comp, int req_comp) -{ - stbi__result_info ri; - void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16); - - if (result == NULL) - return NULL; - - // it is the responsibility of the loaders to make sure we get either 8 or 16 bit. - STBI_ASSERT(ri.bits_per_channel == 8 || ri.bits_per_channel == 16); - - if (ri.bits_per_channel != 16) { - result = stbi__convert_8_to_16((stbi_uc *) result, *x, *y, req_comp == 0 ? *comp : req_comp); - ri.bits_per_channel = 16; - } - - // @TODO: move stbi__convert_format16 to here - // @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to keep more precision - - if (stbi__vertically_flip_on_load) { - int channels = req_comp ? req_comp : *comp; - stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi__uint16)); - } - - return (stbi__uint16 *) result; -} - -#if !defined(STBI_NO_HDR) && !defined(STBI_NO_LINEAR) -static void stbi__float_postprocess(float *result, int *x, int *y, int *comp, int req_comp) -{ - if (stbi__vertically_flip_on_load && result != NULL) { - int channels = req_comp ? req_comp : *comp; - stbi__vertical_flip(result, *x, *y, channels * sizeof(float)); - } -} -#endif - -#ifndef STBI_NO_STDIO - -#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8) -STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide); -STBI_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t *widestr, int cchwide, char *str, int cbmb, const char *defchar, int *used_default); -#endif - -#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8) -STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input) -{ - return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int) bufferlen, NULL, NULL); -} -#endif - -static FILE *stbi__fopen(char const *filename, char const *mode) -{ - FILE *f; -#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8) - wchar_t wMode[64]; - wchar_t wFilename[1024]; - if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename)/sizeof(*wFilename))) - return 0; - - if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode)/sizeof(*wMode))) - return 0; - -#if defined(_MSC_VER) && _MSC_VER >= 1400 - if (0 != _wfopen_s(&f, wFilename, wMode)) - f = 0; -#else - f = _wfopen(wFilename, wMode); -#endif - -#elif defined(_MSC_VER) && _MSC_VER >= 1400 - if (0 != fopen_s(&f, filename, mode)) - f=0; -#else - f = fopen(filename, mode); -#endif - return f; -} - - -STBIDEF stbi_uc *stbi_load(char const *filename, int *x, int *y, int *comp, int req_comp) -{ - FILE *f = stbi__fopen(filename, "rb"); - unsigned char *result; - if (!f) return stbi__errpuc("can't fopen", "Unable to open file"); - result = stbi_load_from_file(f,x,y,comp,req_comp); - fclose(f); - return result; -} - -STBIDEF stbi_uc *stbi_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) -{ - unsigned char *result; - stbi__context s; - stbi__start_file(&s,f); - result = stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp); - if (result) { - // need to 'unget' all the characters in the IO buffer - fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR); - } - return result; -} - -STBIDEF stbi__uint16 *stbi_load_from_file_16(FILE *f, int *x, int *y, int *comp, int req_comp) -{ - stbi__uint16 *result; - stbi__context s; - stbi__start_file(&s,f); - result = stbi__load_and_postprocess_16bit(&s,x,y,comp,req_comp); - if (result) { - // need to 'unget' all the characters in the IO buffer - fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR); - } - return result; -} - -STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp) -{ - FILE *f = stbi__fopen(filename, "rb"); - stbi__uint16 *result; - if (!f) return (stbi_us *) stbi__errpuc("can't fopen", "Unable to open file"); - result = stbi_load_from_file_16(f,x,y,comp,req_comp); - fclose(f); - return result; -} - - -#endif //!STBI_NO_STDIO - -STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels) -{ - stbi__context s; - stbi__start_mem(&s,buffer,len); - return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels); -} - -STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user); - return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels); -} - -STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) -{ - stbi__context s; - stbi__start_mem(&s,buffer,len); - return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp); -} - -STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user); - return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp); -} - -#ifndef STBI_NO_GIF -STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp) -{ - unsigned char *result; - stbi__context s; - stbi__start_mem(&s,buffer,len); - - result = (unsigned char*) stbi__load_gif_main(&s, delays, x, y, z, comp, req_comp); - if (stbi__vertically_flip_on_load) { - stbi__vertical_flip_slices( result, *x, *y, *z, *comp ); - } - - return result; -} -#endif - -#ifndef STBI_NO_LINEAR -static float *stbi__loadf_main(stbi__context *s, int *x, int *y, int *comp, int req_comp) -{ - unsigned char *data; - #ifndef STBI_NO_HDR - if (stbi__hdr_test(s)) { - stbi__result_info ri; - float *hdr_data = stbi__hdr_load(s,x,y,comp,req_comp, &ri); - if (hdr_data) - stbi__float_postprocess(hdr_data,x,y,comp,req_comp); - return hdr_data; - } - #endif - data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp); - if (data) - return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp); - return stbi__errpf("unknown image type", "Image not of any known type, or corrupt"); -} - -STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) -{ - stbi__context s; - stbi__start_mem(&s,buffer,len); - return stbi__loadf_main(&s,x,y,comp,req_comp); -} - -STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user); - return stbi__loadf_main(&s,x,y,comp,req_comp); -} - -#ifndef STBI_NO_STDIO -STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp) -{ - float *result; - FILE *f = stbi__fopen(filename, "rb"); - if (!f) return stbi__errpf("can't fopen", "Unable to open file"); - result = stbi_loadf_from_file(f,x,y,comp,req_comp); - fclose(f); - return result; -} - -STBIDEF float *stbi_loadf_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) -{ - stbi__context s; - stbi__start_file(&s,f); - return stbi__loadf_main(&s,x,y,comp,req_comp); -} -#endif // !STBI_NO_STDIO - -#endif // !STBI_NO_LINEAR - -// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is -// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always -// reports false! - -STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len) -{ - #ifndef STBI_NO_HDR - stbi__context s; - stbi__start_mem(&s,buffer,len); - return stbi__hdr_test(&s); - #else - STBI_NOTUSED(buffer); - STBI_NOTUSED(len); - return 0; - #endif -} - -#ifndef STBI_NO_STDIO -STBIDEF int stbi_is_hdr (char const *filename) -{ - FILE *f = stbi__fopen(filename, "rb"); - int result=0; - if (f) { - result = stbi_is_hdr_from_file(f); - fclose(f); - } - return result; -} - -STBIDEF int stbi_is_hdr_from_file(FILE *f) -{ - #ifndef STBI_NO_HDR - long pos = ftell(f); - int res; - stbi__context s; - stbi__start_file(&s,f); - res = stbi__hdr_test(&s); - fseek(f, pos, SEEK_SET); - return res; - #else - STBI_NOTUSED(f); - return 0; - #endif -} -#endif // !STBI_NO_STDIO - -STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user) -{ - #ifndef STBI_NO_HDR - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user); - return stbi__hdr_test(&s); - #else - STBI_NOTUSED(clbk); - STBI_NOTUSED(user); - return 0; - #endif -} - -#ifndef STBI_NO_LINEAR -static float stbi__l2h_gamma=2.2f, stbi__l2h_scale=1.0f; - -STBIDEF void stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; } -STBIDEF void stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; } -#endif - -static float stbi__h2l_gamma_i=1.0f/2.2f, stbi__h2l_scale_i=1.0f; - -STBIDEF void stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; } -STBIDEF void stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; } - - -////////////////////////////////////////////////////////////////////////////// -// -// Common code used by all image loaders -// - -enum -{ - STBI__SCAN_load=0, - STBI__SCAN_type, - STBI__SCAN_header -}; - -static void stbi__refill_buffer(stbi__context *s) -{ - int n = (s->io.read)(s->io_user_data,(char*)s->buffer_start,s->buflen); - s->callback_already_read += (int) (s->img_buffer - s->img_buffer_original); - if (n == 0) { - // at end of file, treat same as if from memory, but need to handle case - // where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file - s->read_from_callbacks = 0; - s->img_buffer = s->buffer_start; - s->img_buffer_end = s->buffer_start+1; - *s->img_buffer = 0; - } else { - s->img_buffer = s->buffer_start; - s->img_buffer_end = s->buffer_start + n; - } -} - -stbi_inline static stbi_uc stbi__get8(stbi__context *s) -{ - if (s->img_buffer < s->img_buffer_end) - return *s->img_buffer++; - if (s->read_from_callbacks) { - stbi__refill_buffer(s); - return *s->img_buffer++; - } - return 0; -} - -#if defined(STBI_NO_JPEG) && defined(STBI_NO_HDR) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM) -// nothing -#else -stbi_inline static int stbi__at_eof(stbi__context *s) -{ - if (s->io.read) { - if (!(s->io.eof)(s->io_user_data)) return 0; - // if feof() is true, check if buffer = end - // special case: we've only got the special 0 character at the end - if (s->read_from_callbacks == 0) return 1; - } - - return s->img_buffer >= s->img_buffer_end; -} -#endif - -#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) -// nothing -#else -static void stbi__skip(stbi__context *s, int n) -{ - if (n == 0) return; // already there! - if (n < 0) { - s->img_buffer = s->img_buffer_end; - return; - } - if (s->io.read) { - int blen = (int) (s->img_buffer_end - s->img_buffer); - if (blen < n) { - s->img_buffer = s->img_buffer_end; - (s->io.skip)(s->io_user_data, n - blen); - return; - } - } - s->img_buffer += n; -} -#endif - -#if defined(STBI_NO_PNG) && defined(STBI_NO_TGA) && defined(STBI_NO_HDR) && defined(STBI_NO_PNM) -// nothing -#else -static int stbi__getn(stbi__context *s, stbi_uc *buffer, int n) -{ - if (s->io.read) { - int blen = (int) (s->img_buffer_end - s->img_buffer); - if (blen < n) { - int res, count; - - memcpy(buffer, s->img_buffer, blen); - - count = (s->io.read)(s->io_user_data, (char*) buffer + blen, n - blen); - res = (count == (n-blen)); - s->img_buffer = s->img_buffer_end; - return res; - } - } - - if (s->img_buffer+n <= s->img_buffer_end) { - memcpy(buffer, s->img_buffer, n); - s->img_buffer += n; - return 1; - } else - return 0; -} -#endif - -#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC) -// nothing -#else -static int stbi__get16be(stbi__context *s) -{ - int z = stbi__get8(s); - return (z << 8) + stbi__get8(s); -} -#endif - -#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC) -// nothing -#else -static stbi__uint32 stbi__get32be(stbi__context *s) -{ - stbi__uint32 z = stbi__get16be(s); - return (z << 16) + stbi__get16be(s); -} -#endif - -#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) -// nothing -#else -static int stbi__get16le(stbi__context *s) -{ - int z = stbi__get8(s); - return z + (stbi__get8(s) << 8); -} -#endif - -#ifndef STBI_NO_BMP -static stbi__uint32 stbi__get32le(stbi__context *s) -{ - stbi__uint32 z = stbi__get16le(s); - z += (stbi__uint32)stbi__get16le(s) << 16; - return z; -} -#endif - -#define STBI__BYTECAST(x) ((stbi_uc) ((x) & 255)) // truncate int to byte without warnings - -#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM) -// nothing -#else -////////////////////////////////////////////////////////////////////////////// -// -// generic converter from built-in img_n to req_comp -// individual types do this automatically as much as possible (e.g. jpeg -// does all cases internally since it needs to colorspace convert anyway, -// and it never has alpha, so very few cases ). png can automatically -// interleave an alpha=255 channel, but falls back to this for other cases -// -// assume data buffer is malloced, so malloc a new one and free that one -// only failure mode is malloc failing - -static stbi_uc stbi__compute_y(int r, int g, int b) -{ - return (stbi_uc) (((r*77) + (g*150) + (29*b)) >> 8); -} -#endif - -#if defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM) -// nothing -#else -static unsigned char *stbi__convert_format(unsigned char *data, int img_n, int req_comp, unsigned int x, unsigned int y) -{ - int i,j; - unsigned char *good; - - if (req_comp == img_n) return data; - STBI_ASSERT(req_comp >= 1 && req_comp <= 4); - - good = (unsigned char *) stbi__malloc_mad3(req_comp, x, y, 0); - if (good == NULL) { - STBI_FREE(data); - return stbi__errpuc("outofmem", "Out of memory"); - } - - for (j=0; j < (int) y; ++j) { - unsigned char *src = data + j * x * img_n ; - unsigned char *dest = good + j * x * req_comp; - - #define STBI__COMBO(a,b) ((a)*8+(b)) - #define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b) - // convert source image with img_n components to one with req_comp components; - // avoid switch per pixel, so use switch per scanline and massive macros - switch (STBI__COMBO(img_n, req_comp)) { - STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=255; } break; - STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; - STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=255; } break; - STBI__CASE(2,1) { dest[0]=src[0]; } break; - STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; - STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1]; } break; - STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=255; } break; - STBI__CASE(3,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); } break; - STBI__CASE(3,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = 255; } break; - STBI__CASE(4,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); } break; - STBI__CASE(4,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = src[3]; } break; - STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2]; } break; - default: STBI_ASSERT(0); STBI_FREE(data); STBI_FREE(good); return stbi__errpuc("unsupported", "Unsupported format conversion"); - } - #undef STBI__CASE - } - - STBI_FREE(data); - return good; -} -#endif - -#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) -// nothing -#else -static stbi__uint16 stbi__compute_y_16(int r, int g, int b) -{ - return (stbi__uint16) (((r*77) + (g*150) + (29*b)) >> 8); -} -#endif - -#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) -// nothing -#else -static stbi__uint16 *stbi__convert_format16(stbi__uint16 *data, int img_n, int req_comp, unsigned int x, unsigned int y) -{ - int i,j; - stbi__uint16 *good; - - if (req_comp == img_n) return data; - STBI_ASSERT(req_comp >= 1 && req_comp <= 4); - - good = (stbi__uint16 *) stbi__malloc(req_comp * x * y * 2); - if (good == NULL) { - STBI_FREE(data); - return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory"); - } - - for (j=0; j < (int) y; ++j) { - stbi__uint16 *src = data + j * x * img_n ; - stbi__uint16 *dest = good + j * x * req_comp; - - #define STBI__COMBO(a,b) ((a)*8+(b)) - #define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b) - // convert source image with img_n components to one with req_comp components; - // avoid switch per pixel, so use switch per scanline and massive macros - switch (STBI__COMBO(img_n, req_comp)) { - STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=0xffff; } break; - STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; - STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=0xffff; } break; - STBI__CASE(2,1) { dest[0]=src[0]; } break; - STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; - STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1]; } break; - STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=0xffff; } break; - STBI__CASE(3,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); } break; - STBI__CASE(3,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = 0xffff; } break; - STBI__CASE(4,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); } break; - STBI__CASE(4,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = src[3]; } break; - STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2]; } break; - default: STBI_ASSERT(0); STBI_FREE(data); STBI_FREE(good); return (stbi__uint16*) stbi__errpuc("unsupported", "Unsupported format conversion"); - } - #undef STBI__CASE - } - - STBI_FREE(data); - return good; -} -#endif - -#ifndef STBI_NO_LINEAR -static float *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp) -{ - int i,k,n; - float *output; - if (!data) return NULL; - output = (float *) stbi__malloc_mad4(x, y, comp, sizeof(float), 0); - if (output == NULL) { STBI_FREE(data); return stbi__errpf("outofmem", "Out of memory"); } - // compute number of non-alpha components - if (comp & 1) n = comp; else n = comp-1; - for (i=0; i < x*y; ++i) { - for (k=0; k < n; ++k) { - output[i*comp + k] = (float) (pow(data[i*comp+k]/255.0f, stbi__l2h_gamma) * stbi__l2h_scale); - } - } - if (n < comp) { - for (i=0; i < x*y; ++i) { - output[i*comp + n] = data[i*comp + n]/255.0f; - } - } - STBI_FREE(data); - return output; -} -#endif - -#ifndef STBI_NO_HDR -#define stbi__float2int(x) ((int) (x)) -static stbi_uc *stbi__hdr_to_ldr(float *data, int x, int y, int comp) -{ - int i,k,n; - stbi_uc *output; - if (!data) return NULL; - output = (stbi_uc *) stbi__malloc_mad3(x, y, comp, 0); - if (output == NULL) { STBI_FREE(data); return stbi__errpuc("outofmem", "Out of memory"); } - // compute number of non-alpha components - if (comp & 1) n = comp; else n = comp-1; - for (i=0; i < x*y; ++i) { - for (k=0; k < n; ++k) { - float z = (float) pow(data[i*comp+k]*stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f; - if (z < 0) z = 0; - if (z > 255) z = 255; - output[i*comp + k] = (stbi_uc) stbi__float2int(z); - } - if (k < comp) { - float z = data[i*comp+k] * 255 + 0.5f; - if (z < 0) z = 0; - if (z > 255) z = 255; - output[i*comp + k] = (stbi_uc) stbi__float2int(z); - } - } - STBI_FREE(data); - return output; -} -#endif - -////////////////////////////////////////////////////////////////////////////// -// -// "baseline" JPEG/JFIF decoder -// -// simple implementation -// - doesn't support delayed output of y-dimension -// - simple interface (only one output format: 8-bit interleaved RGB) -// - doesn't try to recover corrupt jpegs -// - doesn't allow partial loading, loading multiple at once -// - still fast on x86 (copying globals into locals doesn't help x86) -// - allocates lots of intermediate memory (full size of all components) -// - non-interleaved case requires this anyway -// - allows good upsampling (see next) -// high-quality -// - upsampled channels are bilinearly interpolated, even across blocks -// - quality integer IDCT derived from IJG's 'slow' -// performance -// - fast huffman; reasonable integer IDCT -// - some SIMD kernels for common paths on targets with SSE2/NEON -// - uses a lot of intermediate memory, could cache poorly - -#ifndef STBI_NO_JPEG - -// huffman decoding acceleration -#define FAST_BITS 9 // larger handles more cases; smaller stomps less cache - -typedef struct -{ - stbi_uc fast[1 << FAST_BITS]; - // weirdly, repacking this into AoS is a 10% speed loss, instead of a win - stbi__uint16 code[256]; - stbi_uc values[256]; - stbi_uc size[257]; - unsigned int maxcode[18]; - int delta[17]; // old 'firstsymbol' - old 'firstcode' -} stbi__huffman; - -typedef struct -{ - stbi__context *s; - stbi__huffman huff_dc[4]; - stbi__huffman huff_ac[4]; - stbi__uint16 dequant[4][64]; - stbi__int16 fast_ac[4][1 << FAST_BITS]; - -// sizes for components, interleaved MCUs - int img_h_max, img_v_max; - int img_mcu_x, img_mcu_y; - int img_mcu_w, img_mcu_h; - -// definition of jpeg image component - struct - { - int id; - int h,v; - int tq; - int hd,ha; - int dc_pred; - - int x,y,w2,h2; - stbi_uc *data; - void *raw_data, *raw_coeff; - stbi_uc *linebuf; - short *coeff; // progressive only - int coeff_w, coeff_h; // number of 8x8 coefficient blocks - } img_comp[4]; - - stbi__uint32 code_buffer; // jpeg entropy-coded buffer - int code_bits; // number of valid bits - unsigned char marker; // marker seen while filling entropy buffer - int nomore; // flag if we saw a marker so must stop - - int progressive; - int spec_start; - int spec_end; - int succ_high; - int succ_low; - int eob_run; - int jfif; - int app14_color_transform; // Adobe APP14 tag - int rgb; - - int scan_n, order[4]; - int restart_interval, todo; - -// kernels - void (*idct_block_kernel)(stbi_uc *out, int out_stride, short data[64]); - void (*YCbCr_to_RGB_kernel)(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step); - stbi_uc *(*resample_row_hv_2_kernel)(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs); -} stbi__jpeg; - -static int stbi__build_huffman(stbi__huffman *h, int *count) -{ - int i,j,k=0; - unsigned int code; - // build size list for each symbol (from JPEG spec) - for (i=0; i < 16; ++i) - for (j=0; j < count[i]; ++j) - h->size[k++] = (stbi_uc) (i+1); - h->size[k] = 0; - - // compute actual symbols (from jpeg spec) - code = 0; - k = 0; - for(j=1; j <= 16; ++j) { - // compute delta to add to code to compute symbol id - h->delta[j] = k - code; - if (h->size[k] == j) { - while (h->size[k] == j) - h->code[k++] = (stbi__uint16) (code++); - if (code-1 >= (1u << j)) return stbi__err("bad code lengths","Corrupt JPEG"); - } - // compute largest code + 1 for this size, preshifted as needed later - h->maxcode[j] = code << (16-j); - code <<= 1; - } - h->maxcode[j] = 0xffffffff; - - // build non-spec acceleration table; 255 is flag for not-accelerated - memset(h->fast, 255, 1 << FAST_BITS); - for (i=0; i < k; ++i) { - int s = h->size[i]; - if (s <= FAST_BITS) { - int c = h->code[i] << (FAST_BITS-s); - int m = 1 << (FAST_BITS-s); - for (j=0; j < m; ++j) { - h->fast[c+j] = (stbi_uc) i; - } - } - } - return 1; -} - -// build a table that decodes both magnitude and value of small ACs in -// one go. -static void stbi__build_fast_ac(stbi__int16 *fast_ac, stbi__huffman *h) -{ - int i; - for (i=0; i < (1 << FAST_BITS); ++i) { - stbi_uc fast = h->fast[i]; - fast_ac[i] = 0; - if (fast < 255) { - int rs = h->values[fast]; - int run = (rs >> 4) & 15; - int magbits = rs & 15; - int len = h->size[fast]; - - if (magbits && len + magbits <= FAST_BITS) { - // magnitude code followed by receive_extend code - int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits); - int m = 1 << (magbits - 1); - if (k < m) k += (~0U << magbits) + 1; - // if the result is small enough, we can fit it in fast_ac table - if (k >= -128 && k <= 127) - fast_ac[i] = (stbi__int16) ((k * 256) + (run * 16) + (len + magbits)); - } - } - } -} - -static void stbi__grow_buffer_unsafe(stbi__jpeg *j) -{ - do { - unsigned int b = j->nomore ? 0 : stbi__get8(j->s); - if (b == 0xff) { - int c = stbi__get8(j->s); - while (c == 0xff) c = stbi__get8(j->s); // consume fill bytes - if (c != 0) { - j->marker = (unsigned char) c; - j->nomore = 1; - return; - } - } - j->code_buffer |= b << (24 - j->code_bits); - j->code_bits += 8; - } while (j->code_bits <= 24); -} - -// (1 << n) - 1 -static const stbi__uint32 stbi__bmask[17]={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535}; - -// decode a jpeg huffman value from the bitstream -stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg *j, stbi__huffman *h) -{ - unsigned int temp; - int c,k; - - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - - // look at the top FAST_BITS and determine what symbol ID it is, - // if the code is <= FAST_BITS - c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1); - k = h->fast[c]; - if (k < 255) { - int s = h->size[k]; - if (s > j->code_bits) - return -1; - j->code_buffer <<= s; - j->code_bits -= s; - return h->values[k]; - } - - // naive test is to shift the code_buffer down so k bits are - // valid, then test against maxcode. To speed this up, we've - // preshifted maxcode left so that it has (16-k) 0s at the - // end; in other words, regardless of the number of bits, it - // wants to be compared against something shifted to have 16; - // that way we don't need to shift inside the loop. - temp = j->code_buffer >> 16; - for (k=FAST_BITS+1 ; ; ++k) - if (temp < h->maxcode[k]) - break; - if (k == 17) { - // error! code not found - j->code_bits -= 16; - return -1; - } - - if (k > j->code_bits) - return -1; - - // convert the huffman code to the symbol id - c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k]; - STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]); - - // convert the id to a symbol - j->code_bits -= k; - j->code_buffer <<= k; - return h->values[c]; -} - -// bias[n] = (-1<code_bits < n) stbi__grow_buffer_unsafe(j); - - sgn = j->code_buffer >> 31; // sign bit always in MSB; 0 if MSB clear (positive), 1 if MSB set (negative) - k = stbi_lrot(j->code_buffer, n); - j->code_buffer = k & ~stbi__bmask[n]; - k &= stbi__bmask[n]; - j->code_bits -= n; - return k + (stbi__jbias[n] & (sgn - 1)); -} - -// get some unsigned bits -stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg *j, int n) -{ - unsigned int k; - if (j->code_bits < n) stbi__grow_buffer_unsafe(j); - k = stbi_lrot(j->code_buffer, n); - j->code_buffer = k & ~stbi__bmask[n]; - k &= stbi__bmask[n]; - j->code_bits -= n; - return k; -} - -stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg *j) -{ - unsigned int k; - if (j->code_bits < 1) stbi__grow_buffer_unsafe(j); - k = j->code_buffer; - j->code_buffer <<= 1; - --j->code_bits; - return k & 0x80000000; -} - -// given a value that's at position X in the zigzag stream, -// where does it appear in the 8x8 matrix coded as row-major? -static const stbi_uc stbi__jpeg_dezigzag[64+15] = -{ - 0, 1, 8, 16, 9, 2, 3, 10, - 17, 24, 32, 25, 18, 11, 4, 5, - 12, 19, 26, 33, 40, 48, 41, 34, - 27, 20, 13, 6, 7, 14, 21, 28, - 35, 42, 49, 56, 57, 50, 43, 36, - 29, 22, 15, 23, 30, 37, 44, 51, - 58, 59, 52, 45, 38, 31, 39, 46, - 53, 60, 61, 54, 47, 55, 62, 63, - // let corrupt input sample past end - 63, 63, 63, 63, 63, 63, 63, 63, - 63, 63, 63, 63, 63, 63, 63 -}; - -// decode one 64-entry block-- -static int stbi__jpeg_decode_block(stbi__jpeg *j, short data[64], stbi__huffman *hdc, stbi__huffman *hac, stbi__int16 *fac, int b, stbi__uint16 *dequant) -{ - int diff,dc,k; - int t; - - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - t = stbi__jpeg_huff_decode(j, hdc); - if (t < 0 || t > 15) return stbi__err("bad huffman code","Corrupt JPEG"); - - // 0 all the ac values now so we can do it 32-bits at a time - memset(data,0,64*sizeof(data[0])); - - diff = t ? stbi__extend_receive(j, t) : 0; - dc = j->img_comp[b].dc_pred + diff; - j->img_comp[b].dc_pred = dc; - data[0] = (short) (dc * dequant[0]); - - // decode AC components, see JPEG spec - k = 1; - do { - unsigned int zig; - int c,r,s; - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1); - r = fac[c]; - if (r) { // fast-AC path - k += (r >> 4) & 15; // run - s = r & 15; // combined length - j->code_buffer <<= s; - j->code_bits -= s; - // decode into unzigzag'd location - zig = stbi__jpeg_dezigzag[k++]; - data[zig] = (short) ((r >> 8) * dequant[zig]); - } else { - int rs = stbi__jpeg_huff_decode(j, hac); - if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG"); - s = rs & 15; - r = rs >> 4; - if (s == 0) { - if (rs != 0xf0) break; // end block - k += 16; - } else { - k += r; - // decode into unzigzag'd location - zig = stbi__jpeg_dezigzag[k++]; - data[zig] = (short) (stbi__extend_receive(j,s) * dequant[zig]); - } - } - } while (k < 64); - return 1; -} - -static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg *j, short data[64], stbi__huffman *hdc, int b) -{ - int diff,dc; - int t; - if (j->spec_end != 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); - - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - - if (j->succ_high == 0) { - // first scan for DC coefficient, must be first - memset(data,0,64*sizeof(data[0])); // 0 all the ac values now - t = stbi__jpeg_huff_decode(j, hdc); - if (t < 0 || t > 15) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); - diff = t ? stbi__extend_receive(j, t) : 0; - - dc = j->img_comp[b].dc_pred + diff; - j->img_comp[b].dc_pred = dc; - data[0] = (short) (dc * (1 << j->succ_low)); - } else { - // refinement scan for DC coefficient - if (stbi__jpeg_get_bit(j)) - data[0] += (short) (1 << j->succ_low); - } - return 1; -} - -// @OPTIMIZE: store non-zigzagged during the decode passes, -// and only de-zigzag when dequantizing -static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg *j, short data[64], stbi__huffman *hac, stbi__int16 *fac) -{ - int k; - if (j->spec_start == 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); - - if (j->succ_high == 0) { - int shift = j->succ_low; - - if (j->eob_run) { - --j->eob_run; - return 1; - } - - k = j->spec_start; - do { - unsigned int zig; - int c,r,s; - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1); - r = fac[c]; - if (r) { // fast-AC path - k += (r >> 4) & 15; // run - s = r & 15; // combined length - j->code_buffer <<= s; - j->code_bits -= s; - zig = stbi__jpeg_dezigzag[k++]; - data[zig] = (short) ((r >> 8) * (1 << shift)); - } else { - int rs = stbi__jpeg_huff_decode(j, hac); - if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG"); - s = rs & 15; - r = rs >> 4; - if (s == 0) { - if (r < 15) { - j->eob_run = (1 << r); - if (r) - j->eob_run += stbi__jpeg_get_bits(j, r); - --j->eob_run; - break; - } - k += 16; - } else { - k += r; - zig = stbi__jpeg_dezigzag[k++]; - data[zig] = (short) (stbi__extend_receive(j,s) * (1 << shift)); - } - } - } while (k <= j->spec_end); - } else { - // refinement scan for these AC coefficients - - short bit = (short) (1 << j->succ_low); - - if (j->eob_run) { - --j->eob_run; - for (k = j->spec_start; k <= j->spec_end; ++k) { - short *p = &data[stbi__jpeg_dezigzag[k]]; - if (*p != 0) - if (stbi__jpeg_get_bit(j)) - if ((*p & bit)==0) { - if (*p > 0) - *p += bit; - else - *p -= bit; - } - } - } else { - k = j->spec_start; - do { - int r,s; - int rs = stbi__jpeg_huff_decode(j, hac); // @OPTIMIZE see if we can use the fast path here, advance-by-r is so slow, eh - if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG"); - s = rs & 15; - r = rs >> 4; - if (s == 0) { - if (r < 15) { - j->eob_run = (1 << r) - 1; - if (r) - j->eob_run += stbi__jpeg_get_bits(j, r); - r = 64; // force end of block - } else { - // r=15 s=0 should write 16 0s, so we just do - // a run of 15 0s and then write s (which is 0), - // so we don't have to do anything special here - } - } else { - if (s != 1) return stbi__err("bad huffman code", "Corrupt JPEG"); - // sign bit - if (stbi__jpeg_get_bit(j)) - s = bit; - else - s = -bit; - } - - // advance by r - while (k <= j->spec_end) { - short *p = &data[stbi__jpeg_dezigzag[k++]]; - if (*p != 0) { - if (stbi__jpeg_get_bit(j)) - if ((*p & bit)==0) { - if (*p > 0) - *p += bit; - else - *p -= bit; - } - } else { - if (r == 0) { - *p = (short) s; - break; - } - --r; - } - } - } while (k <= j->spec_end); - } - } - return 1; -} - -// take a -128..127 value and stbi__clamp it and convert to 0..255 -stbi_inline static stbi_uc stbi__clamp(int x) -{ - // trick to use a single test to catch both cases - if ((unsigned int) x > 255) { - if (x < 0) return 0; - if (x > 255) return 255; - } - return (stbi_uc) x; -} - -#define stbi__f2f(x) ((int) (((x) * 4096 + 0.5))) -#define stbi__fsh(x) ((x) * 4096) - -// derived from jidctint -- DCT_ISLOW -#define STBI__IDCT_1D(s0,s1,s2,s3,s4,s5,s6,s7) \ - int t0,t1,t2,t3,p1,p2,p3,p4,p5,x0,x1,x2,x3; \ - p2 = s2; \ - p3 = s6; \ - p1 = (p2+p3) * stbi__f2f(0.5411961f); \ - t2 = p1 + p3*stbi__f2f(-1.847759065f); \ - t3 = p1 + p2*stbi__f2f( 0.765366865f); \ - p2 = s0; \ - p3 = s4; \ - t0 = stbi__fsh(p2+p3); \ - t1 = stbi__fsh(p2-p3); \ - x0 = t0+t3; \ - x3 = t0-t3; \ - x1 = t1+t2; \ - x2 = t1-t2; \ - t0 = s7; \ - t1 = s5; \ - t2 = s3; \ - t3 = s1; \ - p3 = t0+t2; \ - p4 = t1+t3; \ - p1 = t0+t3; \ - p2 = t1+t2; \ - p5 = (p3+p4)*stbi__f2f( 1.175875602f); \ - t0 = t0*stbi__f2f( 0.298631336f); \ - t1 = t1*stbi__f2f( 2.053119869f); \ - t2 = t2*stbi__f2f( 3.072711026f); \ - t3 = t3*stbi__f2f( 1.501321110f); \ - p1 = p5 + p1*stbi__f2f(-0.899976223f); \ - p2 = p5 + p2*stbi__f2f(-2.562915447f); \ - p3 = p3*stbi__f2f(-1.961570560f); \ - p4 = p4*stbi__f2f(-0.390180644f); \ - t3 += p1+p4; \ - t2 += p2+p3; \ - t1 += p2+p4; \ - t0 += p1+p3; - -static void stbi__idct_block(stbi_uc *out, int out_stride, short data[64]) -{ - int i,val[64],*v=val; - stbi_uc *o; - short *d = data; - - // columns - for (i=0; i < 8; ++i,++d, ++v) { - // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing - if (d[ 8]==0 && d[16]==0 && d[24]==0 && d[32]==0 - && d[40]==0 && d[48]==0 && d[56]==0) { - // no shortcut 0 seconds - // (1|2|3|4|5|6|7)==0 0 seconds - // all separate -0.047 seconds - // 1 && 2|3 && 4|5 && 6|7: -0.047 seconds - int dcterm = d[0]*4; - v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm; - } else { - STBI__IDCT_1D(d[ 0],d[ 8],d[16],d[24],d[32],d[40],d[48],d[56]) - // constants scaled things up by 1<<12; let's bring them back - // down, but keep 2 extra bits of precision - x0 += 512; x1 += 512; x2 += 512; x3 += 512; - v[ 0] = (x0+t3) >> 10; - v[56] = (x0-t3) >> 10; - v[ 8] = (x1+t2) >> 10; - v[48] = (x1-t2) >> 10; - v[16] = (x2+t1) >> 10; - v[40] = (x2-t1) >> 10; - v[24] = (x3+t0) >> 10; - v[32] = (x3-t0) >> 10; - } - } - - for (i=0, v=val, o=out; i < 8; ++i,v+=8,o+=out_stride) { - // no fast case since the first 1D IDCT spread components out - STBI__IDCT_1D(v[0],v[1],v[2],v[3],v[4],v[5],v[6],v[7]) - // constants scaled things up by 1<<12, plus we had 1<<2 from first - // loop, plus horizontal and vertical each scale by sqrt(8) so together - // we've got an extra 1<<3, so 1<<17 total we need to remove. - // so we want to round that, which means adding 0.5 * 1<<17, - // aka 65536. Also, we'll end up with -128 to 127 that we want - // to encode as 0..255 by adding 128, so we'll add that before the shift - x0 += 65536 + (128<<17); - x1 += 65536 + (128<<17); - x2 += 65536 + (128<<17); - x3 += 65536 + (128<<17); - // tried computing the shifts into temps, or'ing the temps to see - // if any were out of range, but that was slower - o[0] = stbi__clamp((x0+t3) >> 17); - o[7] = stbi__clamp((x0-t3) >> 17); - o[1] = stbi__clamp((x1+t2) >> 17); - o[6] = stbi__clamp((x1-t2) >> 17); - o[2] = stbi__clamp((x2+t1) >> 17); - o[5] = stbi__clamp((x2-t1) >> 17); - o[3] = stbi__clamp((x3+t0) >> 17); - o[4] = stbi__clamp((x3-t0) >> 17); - } -} - -#ifdef STBI_SSE2 -// sse2 integer IDCT. not the fastest possible implementation but it -// produces bit-identical results to the generic C version so it's -// fully "transparent". -static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64]) -{ - // This is constructed to match our regular (generic) integer IDCT exactly. - __m128i row0, row1, row2, row3, row4, row5, row6, row7; - __m128i tmp; - - // dot product constant: even elems=x, odd elems=y - #define dct_const(x,y) _mm_setr_epi16((x),(y),(x),(y),(x),(y),(x),(y)) - - // out(0) = c0[even]*x + c0[odd]*y (c0, x, y 16-bit, out 32-bit) - // out(1) = c1[even]*x + c1[odd]*y - #define dct_rot(out0,out1, x,y,c0,c1) \ - __m128i c0##lo = _mm_unpacklo_epi16((x),(y)); \ - __m128i c0##hi = _mm_unpackhi_epi16((x),(y)); \ - __m128i out0##_l = _mm_madd_epi16(c0##lo, c0); \ - __m128i out0##_h = _mm_madd_epi16(c0##hi, c0); \ - __m128i out1##_l = _mm_madd_epi16(c0##lo, c1); \ - __m128i out1##_h = _mm_madd_epi16(c0##hi, c1) - - // out = in << 12 (in 16-bit, out 32-bit) - #define dct_widen(out, in) \ - __m128i out##_l = _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4); \ - __m128i out##_h = _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4) - - // wide add - #define dct_wadd(out, a, b) \ - __m128i out##_l = _mm_add_epi32(a##_l, b##_l); \ - __m128i out##_h = _mm_add_epi32(a##_h, b##_h) - - // wide sub - #define dct_wsub(out, a, b) \ - __m128i out##_l = _mm_sub_epi32(a##_l, b##_l); \ - __m128i out##_h = _mm_sub_epi32(a##_h, b##_h) - - // butterfly a/b, add bias, then shift by "s" and pack - #define dct_bfly32o(out0, out1, a,b,bias,s) \ - { \ - __m128i abiased_l = _mm_add_epi32(a##_l, bias); \ - __m128i abiased_h = _mm_add_epi32(a##_h, bias); \ - dct_wadd(sum, abiased, b); \ - dct_wsub(dif, abiased, b); \ - out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s), _mm_srai_epi32(sum_h, s)); \ - out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s), _mm_srai_epi32(dif_h, s)); \ - } - - // 8-bit interleave step (for transposes) - #define dct_interleave8(a, b) \ - tmp = a; \ - a = _mm_unpacklo_epi8(a, b); \ - b = _mm_unpackhi_epi8(tmp, b) - - // 16-bit interleave step (for transposes) - #define dct_interleave16(a, b) \ - tmp = a; \ - a = _mm_unpacklo_epi16(a, b); \ - b = _mm_unpackhi_epi16(tmp, b) - - #define dct_pass(bias,shift) \ - { \ - /* even part */ \ - dct_rot(t2e,t3e, row2,row6, rot0_0,rot0_1); \ - __m128i sum04 = _mm_add_epi16(row0, row4); \ - __m128i dif04 = _mm_sub_epi16(row0, row4); \ - dct_widen(t0e, sum04); \ - dct_widen(t1e, dif04); \ - dct_wadd(x0, t0e, t3e); \ - dct_wsub(x3, t0e, t3e); \ - dct_wadd(x1, t1e, t2e); \ - dct_wsub(x2, t1e, t2e); \ - /* odd part */ \ - dct_rot(y0o,y2o, row7,row3, rot2_0,rot2_1); \ - dct_rot(y1o,y3o, row5,row1, rot3_0,rot3_1); \ - __m128i sum17 = _mm_add_epi16(row1, row7); \ - __m128i sum35 = _mm_add_epi16(row3, row5); \ - dct_rot(y4o,y5o, sum17,sum35, rot1_0,rot1_1); \ - dct_wadd(x4, y0o, y4o); \ - dct_wadd(x5, y1o, y5o); \ - dct_wadd(x6, y2o, y5o); \ - dct_wadd(x7, y3o, y4o); \ - dct_bfly32o(row0,row7, x0,x7,bias,shift); \ - dct_bfly32o(row1,row6, x1,x6,bias,shift); \ - dct_bfly32o(row2,row5, x2,x5,bias,shift); \ - dct_bfly32o(row3,row4, x3,x4,bias,shift); \ - } - - __m128i rot0_0 = dct_const(stbi__f2f(0.5411961f), stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f)); - __m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f( 0.765366865f), stbi__f2f(0.5411961f)); - __m128i rot1_0 = dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f), stbi__f2f(1.175875602f)); - __m128i rot1_1 = dct_const(stbi__f2f(1.175875602f), stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f)); - __m128i rot2_0 = dct_const(stbi__f2f(-1.961570560f) + stbi__f2f( 0.298631336f), stbi__f2f(-1.961570560f)); - __m128i rot2_1 = dct_const(stbi__f2f(-1.961570560f), stbi__f2f(-1.961570560f) + stbi__f2f( 3.072711026f)); - __m128i rot3_0 = dct_const(stbi__f2f(-0.390180644f) + stbi__f2f( 2.053119869f), stbi__f2f(-0.390180644f)); - __m128i rot3_1 = dct_const(stbi__f2f(-0.390180644f), stbi__f2f(-0.390180644f) + stbi__f2f( 1.501321110f)); - - // rounding biases in column/row passes, see stbi__idct_block for explanation. - __m128i bias_0 = _mm_set1_epi32(512); - __m128i bias_1 = _mm_set1_epi32(65536 + (128<<17)); - - // load - row0 = _mm_load_si128((const __m128i *) (data + 0*8)); - row1 = _mm_load_si128((const __m128i *) (data + 1*8)); - row2 = _mm_load_si128((const __m128i *) (data + 2*8)); - row3 = _mm_load_si128((const __m128i *) (data + 3*8)); - row4 = _mm_load_si128((const __m128i *) (data + 4*8)); - row5 = _mm_load_si128((const __m128i *) (data + 5*8)); - row6 = _mm_load_si128((const __m128i *) (data + 6*8)); - row7 = _mm_load_si128((const __m128i *) (data + 7*8)); - - // column pass - dct_pass(bias_0, 10); - - { - // 16bit 8x8 transpose pass 1 - dct_interleave16(row0, row4); - dct_interleave16(row1, row5); - dct_interleave16(row2, row6); - dct_interleave16(row3, row7); - - // transpose pass 2 - dct_interleave16(row0, row2); - dct_interleave16(row1, row3); - dct_interleave16(row4, row6); - dct_interleave16(row5, row7); - - // transpose pass 3 - dct_interleave16(row0, row1); - dct_interleave16(row2, row3); - dct_interleave16(row4, row5); - dct_interleave16(row6, row7); - } - - // row pass - dct_pass(bias_1, 17); - - { - // pack - __m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7 - __m128i p1 = _mm_packus_epi16(row2, row3); - __m128i p2 = _mm_packus_epi16(row4, row5); - __m128i p3 = _mm_packus_epi16(row6, row7); - - // 8bit 8x8 transpose pass 1 - dct_interleave8(p0, p2); // a0e0a1e1... - dct_interleave8(p1, p3); // c0g0c1g1... - - // transpose pass 2 - dct_interleave8(p0, p1); // a0c0e0g0... - dct_interleave8(p2, p3); // b0d0f0h0... - - // transpose pass 3 - dct_interleave8(p0, p2); // a0b0c0d0... - dct_interleave8(p1, p3); // a4b4c4d4... - - // store - _mm_storel_epi64((__m128i *) out, p0); out += out_stride; - _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p0, 0x4e)); out += out_stride; - _mm_storel_epi64((__m128i *) out, p2); out += out_stride; - _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p2, 0x4e)); out += out_stride; - _mm_storel_epi64((__m128i *) out, p1); out += out_stride; - _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p1, 0x4e)); out += out_stride; - _mm_storel_epi64((__m128i *) out, p3); out += out_stride; - _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p3, 0x4e)); - } - -#undef dct_const -#undef dct_rot -#undef dct_widen -#undef dct_wadd -#undef dct_wsub -#undef dct_bfly32o -#undef dct_interleave8 -#undef dct_interleave16 -#undef dct_pass -} - -#endif // STBI_SSE2 - -#ifdef STBI_NEON - -// NEON integer IDCT. should produce bit-identical -// results to the generic C version. -static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64]) -{ - int16x8_t row0, row1, row2, row3, row4, row5, row6, row7; - - int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f)); - int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f)); - int16x4_t rot0_2 = vdup_n_s16(stbi__f2f( 0.765366865f)); - int16x4_t rot1_0 = vdup_n_s16(stbi__f2f( 1.175875602f)); - int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f)); - int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f)); - int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f)); - int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f)); - int16x4_t rot3_0 = vdup_n_s16(stbi__f2f( 0.298631336f)); - int16x4_t rot3_1 = vdup_n_s16(stbi__f2f( 2.053119869f)); - int16x4_t rot3_2 = vdup_n_s16(stbi__f2f( 3.072711026f)); - int16x4_t rot3_3 = vdup_n_s16(stbi__f2f( 1.501321110f)); - -#define dct_long_mul(out, inq, coeff) \ - int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff); \ - int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff) - -#define dct_long_mac(out, acc, inq, coeff) \ - int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff); \ - int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff) - -#define dct_widen(out, inq) \ - int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12); \ - int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12) - -// wide add -#define dct_wadd(out, a, b) \ - int32x4_t out##_l = vaddq_s32(a##_l, b##_l); \ - int32x4_t out##_h = vaddq_s32(a##_h, b##_h) - -// wide sub -#define dct_wsub(out, a, b) \ - int32x4_t out##_l = vsubq_s32(a##_l, b##_l); \ - int32x4_t out##_h = vsubq_s32(a##_h, b##_h) - -// butterfly a/b, then shift using "shiftop" by "s" and pack -#define dct_bfly32o(out0,out1, a,b,shiftop,s) \ - { \ - dct_wadd(sum, a, b); \ - dct_wsub(dif, a, b); \ - out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s)); \ - out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s)); \ - } - -#define dct_pass(shiftop, shift) \ - { \ - /* even part */ \ - int16x8_t sum26 = vaddq_s16(row2, row6); \ - dct_long_mul(p1e, sum26, rot0_0); \ - dct_long_mac(t2e, p1e, row6, rot0_1); \ - dct_long_mac(t3e, p1e, row2, rot0_2); \ - int16x8_t sum04 = vaddq_s16(row0, row4); \ - int16x8_t dif04 = vsubq_s16(row0, row4); \ - dct_widen(t0e, sum04); \ - dct_widen(t1e, dif04); \ - dct_wadd(x0, t0e, t3e); \ - dct_wsub(x3, t0e, t3e); \ - dct_wadd(x1, t1e, t2e); \ - dct_wsub(x2, t1e, t2e); \ - /* odd part */ \ - int16x8_t sum15 = vaddq_s16(row1, row5); \ - int16x8_t sum17 = vaddq_s16(row1, row7); \ - int16x8_t sum35 = vaddq_s16(row3, row5); \ - int16x8_t sum37 = vaddq_s16(row3, row7); \ - int16x8_t sumodd = vaddq_s16(sum17, sum35); \ - dct_long_mul(p5o, sumodd, rot1_0); \ - dct_long_mac(p1o, p5o, sum17, rot1_1); \ - dct_long_mac(p2o, p5o, sum35, rot1_2); \ - dct_long_mul(p3o, sum37, rot2_0); \ - dct_long_mul(p4o, sum15, rot2_1); \ - dct_wadd(sump13o, p1o, p3o); \ - dct_wadd(sump24o, p2o, p4o); \ - dct_wadd(sump23o, p2o, p3o); \ - dct_wadd(sump14o, p1o, p4o); \ - dct_long_mac(x4, sump13o, row7, rot3_0); \ - dct_long_mac(x5, sump24o, row5, rot3_1); \ - dct_long_mac(x6, sump23o, row3, rot3_2); \ - dct_long_mac(x7, sump14o, row1, rot3_3); \ - dct_bfly32o(row0,row7, x0,x7,shiftop,shift); \ - dct_bfly32o(row1,row6, x1,x6,shiftop,shift); \ - dct_bfly32o(row2,row5, x2,x5,shiftop,shift); \ - dct_bfly32o(row3,row4, x3,x4,shiftop,shift); \ - } - - // load - row0 = vld1q_s16(data + 0*8); - row1 = vld1q_s16(data + 1*8); - row2 = vld1q_s16(data + 2*8); - row3 = vld1q_s16(data + 3*8); - row4 = vld1q_s16(data + 4*8); - row5 = vld1q_s16(data + 5*8); - row6 = vld1q_s16(data + 6*8); - row7 = vld1q_s16(data + 7*8); - - // add DC bias - row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0)); - - // column pass - dct_pass(vrshrn_n_s32, 10); - - // 16bit 8x8 transpose - { -// these three map to a single VTRN.16, VTRN.32, and VSWP, respectively. -// whether compilers actually get this is another story, sadly. -#define dct_trn16(x, y) { int16x8x2_t t = vtrnq_s16(x, y); x = t.val[0]; y = t.val[1]; } -#define dct_trn32(x, y) { int32x4x2_t t = vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y)); x = vreinterpretq_s16_s32(t.val[0]); y = vreinterpretq_s16_s32(t.val[1]); } -#define dct_trn64(x, y) { int16x8_t x0 = x; int16x8_t y0 = y; x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0)); y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0)); } - - // pass 1 - dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6 - dct_trn16(row2, row3); - dct_trn16(row4, row5); - dct_trn16(row6, row7); - - // pass 2 - dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4 - dct_trn32(row1, row3); - dct_trn32(row4, row6); - dct_trn32(row5, row7); - - // pass 3 - dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0 - dct_trn64(row1, row5); - dct_trn64(row2, row6); - dct_trn64(row3, row7); - -#undef dct_trn16 -#undef dct_trn32 -#undef dct_trn64 - } - - // row pass - // vrshrn_n_s32 only supports shifts up to 16, we need - // 17. so do a non-rounding shift of 16 first then follow - // up with a rounding shift by 1. - dct_pass(vshrn_n_s32, 16); - - { - // pack and round - uint8x8_t p0 = vqrshrun_n_s16(row0, 1); - uint8x8_t p1 = vqrshrun_n_s16(row1, 1); - uint8x8_t p2 = vqrshrun_n_s16(row2, 1); - uint8x8_t p3 = vqrshrun_n_s16(row3, 1); - uint8x8_t p4 = vqrshrun_n_s16(row4, 1); - uint8x8_t p5 = vqrshrun_n_s16(row5, 1); - uint8x8_t p6 = vqrshrun_n_s16(row6, 1); - uint8x8_t p7 = vqrshrun_n_s16(row7, 1); - - // again, these can translate into one instruction, but often don't. -#define dct_trn8_8(x, y) { uint8x8x2_t t = vtrn_u8(x, y); x = t.val[0]; y = t.val[1]; } -#define dct_trn8_16(x, y) { uint16x4x2_t t = vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y)); x = vreinterpret_u8_u16(t.val[0]); y = vreinterpret_u8_u16(t.val[1]); } -#define dct_trn8_32(x, y) { uint32x2x2_t t = vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y)); x = vreinterpret_u8_u32(t.val[0]); y = vreinterpret_u8_u32(t.val[1]); } - - // sadly can't use interleaved stores here since we only write - // 8 bytes to each scan line! - - // 8x8 8-bit transpose pass 1 - dct_trn8_8(p0, p1); - dct_trn8_8(p2, p3); - dct_trn8_8(p4, p5); - dct_trn8_8(p6, p7); - - // pass 2 - dct_trn8_16(p0, p2); - dct_trn8_16(p1, p3); - dct_trn8_16(p4, p6); - dct_trn8_16(p5, p7); - - // pass 3 - dct_trn8_32(p0, p4); - dct_trn8_32(p1, p5); - dct_trn8_32(p2, p6); - dct_trn8_32(p3, p7); - - // store - vst1_u8(out, p0); out += out_stride; - vst1_u8(out, p1); out += out_stride; - vst1_u8(out, p2); out += out_stride; - vst1_u8(out, p3); out += out_stride; - vst1_u8(out, p4); out += out_stride; - vst1_u8(out, p5); out += out_stride; - vst1_u8(out, p6); out += out_stride; - vst1_u8(out, p7); - -#undef dct_trn8_8 -#undef dct_trn8_16 -#undef dct_trn8_32 - } - -#undef dct_long_mul -#undef dct_long_mac -#undef dct_widen -#undef dct_wadd -#undef dct_wsub -#undef dct_bfly32o -#undef dct_pass -} - -#endif // STBI_NEON - -#define STBI__MARKER_none 0xff -// if there's a pending marker from the entropy stream, return that -// otherwise, fetch from the stream and get a marker. if there's no -// marker, return 0xff, which is never a valid marker value -static stbi_uc stbi__get_marker(stbi__jpeg *j) -{ - stbi_uc x; - if (j->marker != STBI__MARKER_none) { x = j->marker; j->marker = STBI__MARKER_none; return x; } - x = stbi__get8(j->s); - if (x != 0xff) return STBI__MARKER_none; - while (x == 0xff) - x = stbi__get8(j->s); // consume repeated 0xff fill bytes - return x; -} - -// in each scan, we'll have scan_n components, and the order -// of the components is specified by order[] -#define STBI__RESTART(x) ((x) >= 0xd0 && (x) <= 0xd7) - -// after a restart interval, stbi__jpeg_reset the entropy decoder and -// the dc prediction -static void stbi__jpeg_reset(stbi__jpeg *j) -{ - j->code_bits = 0; - j->code_buffer = 0; - j->nomore = 0; - j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = j->img_comp[3].dc_pred = 0; - j->marker = STBI__MARKER_none; - j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff; - j->eob_run = 0; - // no more than 1<<31 MCUs if no restart_interal? that's plenty safe, - // since we don't even allow 1<<30 pixels -} - -static int stbi__parse_entropy_coded_data(stbi__jpeg *z) -{ - stbi__jpeg_reset(z); - if (!z->progressive) { - if (z->scan_n == 1) { - int i,j; - STBI_SIMD_ALIGN(short, data[64]); - int n = z->order[0]; - // non-interleaved data, we just need to process one block at a time, - // in trivial scanline order - // number of blocks to do just depends on how many actual "pixels" this - // component has, independent of interleaved MCU blocking and such - int w = (z->img_comp[n].x+7) >> 3; - int h = (z->img_comp[n].y+7) >> 3; - for (j=0; j < h; ++j) { - for (i=0; i < w; ++i) { - int ha = z->img_comp[n].ha; - if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0; - z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data); - // every data block is an MCU, so countdown the restart interval - if (--z->todo <= 0) { - if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); - // if it's NOT a restart, then just bail, so we get corrupt data - // rather than no data - if (!STBI__RESTART(z->marker)) return 1; - stbi__jpeg_reset(z); - } - } - } - return 1; - } else { // interleaved - int i,j,k,x,y; - STBI_SIMD_ALIGN(short, data[64]); - for (j=0; j < z->img_mcu_y; ++j) { - for (i=0; i < z->img_mcu_x; ++i) { - // scan an interleaved mcu... process scan_n components in order - for (k=0; k < z->scan_n; ++k) { - int n = z->order[k]; - // scan out an mcu's worth of this component; that's just determined - // by the basic H and V specified for the component - for (y=0; y < z->img_comp[n].v; ++y) { - for (x=0; x < z->img_comp[n].h; ++x) { - int x2 = (i*z->img_comp[n].h + x)*8; - int y2 = (j*z->img_comp[n].v + y)*8; - int ha = z->img_comp[n].ha; - if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0; - z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*y2+x2, z->img_comp[n].w2, data); - } - } - } - // after all interleaved components, that's an interleaved MCU, - // so now count down the restart interval - if (--z->todo <= 0) { - if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); - if (!STBI__RESTART(z->marker)) return 1; - stbi__jpeg_reset(z); - } - } - } - return 1; - } - } else { - if (z->scan_n == 1) { - int i,j; - int n = z->order[0]; - // non-interleaved data, we just need to process one block at a time, - // in trivial scanline order - // number of blocks to do just depends on how many actual "pixels" this - // component has, independent of interleaved MCU blocking and such - int w = (z->img_comp[n].x+7) >> 3; - int h = (z->img_comp[n].y+7) >> 3; - for (j=0; j < h; ++j) { - for (i=0; i < w; ++i) { - short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); - if (z->spec_start == 0) { - if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) - return 0; - } else { - int ha = z->img_comp[n].ha; - if (!stbi__jpeg_decode_block_prog_ac(z, data, &z->huff_ac[ha], z->fast_ac[ha])) - return 0; - } - // every data block is an MCU, so countdown the restart interval - if (--z->todo <= 0) { - if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); - if (!STBI__RESTART(z->marker)) return 1; - stbi__jpeg_reset(z); - } - } - } - return 1; - } else { // interleaved - int i,j,k,x,y; - for (j=0; j < z->img_mcu_y; ++j) { - for (i=0; i < z->img_mcu_x; ++i) { - // scan an interleaved mcu... process scan_n components in order - for (k=0; k < z->scan_n; ++k) { - int n = z->order[k]; - // scan out an mcu's worth of this component; that's just determined - // by the basic H and V specified for the component - for (y=0; y < z->img_comp[n].v; ++y) { - for (x=0; x < z->img_comp[n].h; ++x) { - int x2 = (i*z->img_comp[n].h + x); - int y2 = (j*z->img_comp[n].v + y); - short *data = z->img_comp[n].coeff + 64 * (x2 + y2 * z->img_comp[n].coeff_w); - if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) - return 0; - } - } - } - // after all interleaved components, that's an interleaved MCU, - // so now count down the restart interval - if (--z->todo <= 0) { - if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); - if (!STBI__RESTART(z->marker)) return 1; - stbi__jpeg_reset(z); - } - } - } - return 1; - } - } -} - -static void stbi__jpeg_dequantize(short *data, stbi__uint16 *dequant) -{ - int i; - for (i=0; i < 64; ++i) - data[i] *= dequant[i]; -} - -static void stbi__jpeg_finish(stbi__jpeg *z) -{ - if (z->progressive) { - // dequantize and idct the data - int i,j,n; - for (n=0; n < z->s->img_n; ++n) { - int w = (z->img_comp[n].x+7) >> 3; - int h = (z->img_comp[n].y+7) >> 3; - for (j=0; j < h; ++j) { - for (i=0; i < w; ++i) { - short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); - stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]); - z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data); - } - } - } - } -} - -static int stbi__process_marker(stbi__jpeg *z, int m) -{ - int L; - switch (m) { - case STBI__MARKER_none: // no marker found - return stbi__err("expected marker","Corrupt JPEG"); - - case 0xDD: // DRI - specify restart interval - if (stbi__get16be(z->s) != 4) return stbi__err("bad DRI len","Corrupt JPEG"); - z->restart_interval = stbi__get16be(z->s); - return 1; - - case 0xDB: // DQT - define quantization table - L = stbi__get16be(z->s)-2; - while (L > 0) { - int q = stbi__get8(z->s); - int p = q >> 4, sixteen = (p != 0); - int t = q & 15,i; - if (p != 0 && p != 1) return stbi__err("bad DQT type","Corrupt JPEG"); - if (t > 3) return stbi__err("bad DQT table","Corrupt JPEG"); - - for (i=0; i < 64; ++i) - z->dequant[t][stbi__jpeg_dezigzag[i]] = (stbi__uint16)(sixteen ? stbi__get16be(z->s) : stbi__get8(z->s)); - L -= (sixteen ? 129 : 65); - } - return L==0; - - case 0xC4: // DHT - define huffman table - L = stbi__get16be(z->s)-2; - while (L > 0) { - stbi_uc *v; - int sizes[16],i,n=0; - int q = stbi__get8(z->s); - int tc = q >> 4; - int th = q & 15; - if (tc > 1 || th > 3) return stbi__err("bad DHT header","Corrupt JPEG"); - for (i=0; i < 16; ++i) { - sizes[i] = stbi__get8(z->s); - n += sizes[i]; - } - L -= 17; - if (tc == 0) { - if (!stbi__build_huffman(z->huff_dc+th, sizes)) return 0; - v = z->huff_dc[th].values; - } else { - if (!stbi__build_huffman(z->huff_ac+th, sizes)) return 0; - v = z->huff_ac[th].values; - } - for (i=0; i < n; ++i) - v[i] = stbi__get8(z->s); - if (tc != 0) - stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th); - L -= n; - } - return L==0; - } - - // check for comment block or APP blocks - if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) { - L = stbi__get16be(z->s); - if (L < 2) { - if (m == 0xFE) - return stbi__err("bad COM len","Corrupt JPEG"); - else - return stbi__err("bad APP len","Corrupt JPEG"); - } - L -= 2; - - if (m == 0xE0 && L >= 5) { // JFIF APP0 segment - static const unsigned char tag[5] = {'J','F','I','F','\0'}; - int ok = 1; - int i; - for (i=0; i < 5; ++i) - if (stbi__get8(z->s) != tag[i]) - ok = 0; - L -= 5; - if (ok) - z->jfif = 1; - } else if (m == 0xEE && L >= 12) { // Adobe APP14 segment - static const unsigned char tag[6] = {'A','d','o','b','e','\0'}; - int ok = 1; - int i; - for (i=0; i < 6; ++i) - if (stbi__get8(z->s) != tag[i]) - ok = 0; - L -= 6; - if (ok) { - stbi__get8(z->s); // version - stbi__get16be(z->s); // flags0 - stbi__get16be(z->s); // flags1 - z->app14_color_transform = stbi__get8(z->s); // color transform - L -= 6; - } - } - - stbi__skip(z->s, L); - return 1; - } - - return stbi__err("unknown marker","Corrupt JPEG"); -} - -// after we see SOS -static int stbi__process_scan_header(stbi__jpeg *z) -{ - int i; - int Ls = stbi__get16be(z->s); - z->scan_n = stbi__get8(z->s); - if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int) z->s->img_n) return stbi__err("bad SOS component count","Corrupt JPEG"); - if (Ls != 6+2*z->scan_n) return stbi__err("bad SOS len","Corrupt JPEG"); - for (i=0; i < z->scan_n; ++i) { - int id = stbi__get8(z->s), which; - int q = stbi__get8(z->s); - for (which = 0; which < z->s->img_n; ++which) - if (z->img_comp[which].id == id) - break; - if (which == z->s->img_n) return 0; // no match - z->img_comp[which].hd = q >> 4; if (z->img_comp[which].hd > 3) return stbi__err("bad DC huff","Corrupt JPEG"); - z->img_comp[which].ha = q & 15; if (z->img_comp[which].ha > 3) return stbi__err("bad AC huff","Corrupt JPEG"); - z->order[i] = which; - } - - { - int aa; - z->spec_start = stbi__get8(z->s); - z->spec_end = stbi__get8(z->s); // should be 63, but might be 0 - aa = stbi__get8(z->s); - z->succ_high = (aa >> 4); - z->succ_low = (aa & 15); - if (z->progressive) { - if (z->spec_start > 63 || z->spec_end > 63 || z->spec_start > z->spec_end || z->succ_high > 13 || z->succ_low > 13) - return stbi__err("bad SOS", "Corrupt JPEG"); - } else { - if (z->spec_start != 0) return stbi__err("bad SOS","Corrupt JPEG"); - if (z->succ_high != 0 || z->succ_low != 0) return stbi__err("bad SOS","Corrupt JPEG"); - z->spec_end = 63; - } - } - - return 1; -} - -static int stbi__free_jpeg_components(stbi__jpeg *z, int ncomp, int why) -{ - int i; - for (i=0; i < ncomp; ++i) { - if (z->img_comp[i].raw_data) { - STBI_FREE(z->img_comp[i].raw_data); - z->img_comp[i].raw_data = NULL; - z->img_comp[i].data = NULL; - } - if (z->img_comp[i].raw_coeff) { - STBI_FREE(z->img_comp[i].raw_coeff); - z->img_comp[i].raw_coeff = 0; - z->img_comp[i].coeff = 0; - } - if (z->img_comp[i].linebuf) { - STBI_FREE(z->img_comp[i].linebuf); - z->img_comp[i].linebuf = NULL; - } - } - return why; -} - -static int stbi__process_frame_header(stbi__jpeg *z, int scan) -{ - stbi__context *s = z->s; - int Lf,p,i,q, h_max=1,v_max=1,c; - Lf = stbi__get16be(s); if (Lf < 11) return stbi__err("bad SOF len","Corrupt JPEG"); // JPEG - p = stbi__get8(s); if (p != 8) return stbi__err("only 8-bit","JPEG format not supported: 8-bit only"); // JPEG baseline - s->img_y = stbi__get16be(s); if (s->img_y == 0) return stbi__err("no header height", "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG - s->img_x = stbi__get16be(s); if (s->img_x == 0) return stbi__err("0 width","Corrupt JPEG"); // JPEG requires - if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); - if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); - c = stbi__get8(s); - if (c != 3 && c != 1 && c != 4) return stbi__err("bad component count","Corrupt JPEG"); - s->img_n = c; - for (i=0; i < c; ++i) { - z->img_comp[i].data = NULL; - z->img_comp[i].linebuf = NULL; - } - - if (Lf != 8+3*s->img_n) return stbi__err("bad SOF len","Corrupt JPEG"); - - z->rgb = 0; - for (i=0; i < s->img_n; ++i) { - static const unsigned char rgb[3] = { 'R', 'G', 'B' }; - z->img_comp[i].id = stbi__get8(s); - if (s->img_n == 3 && z->img_comp[i].id == rgb[i]) - ++z->rgb; - q = stbi__get8(s); - z->img_comp[i].h = (q >> 4); if (!z->img_comp[i].h || z->img_comp[i].h > 4) return stbi__err("bad H","Corrupt JPEG"); - z->img_comp[i].v = q & 15; if (!z->img_comp[i].v || z->img_comp[i].v > 4) return stbi__err("bad V","Corrupt JPEG"); - z->img_comp[i].tq = stbi__get8(s); if (z->img_comp[i].tq > 3) return stbi__err("bad TQ","Corrupt JPEG"); - } - - if (scan != STBI__SCAN_load) return 1; - - if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0)) return stbi__err("too large", "Image too large to decode"); - - for (i=0; i < s->img_n; ++i) { - if (z->img_comp[i].h > h_max) h_max = z->img_comp[i].h; - if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v; - } - - // check that plane subsampling factors are integer ratios; our resamplers can't deal with fractional ratios - // and I've never seen a non-corrupted JPEG file actually use them - for (i=0; i < s->img_n; ++i) { - if (h_max % z->img_comp[i].h != 0) return stbi__err("bad H","Corrupt JPEG"); - if (v_max % z->img_comp[i].v != 0) return stbi__err("bad V","Corrupt JPEG"); - } - - // compute interleaved mcu info - z->img_h_max = h_max; - z->img_v_max = v_max; - z->img_mcu_w = h_max * 8; - z->img_mcu_h = v_max * 8; - // these sizes can't be more than 17 bits - z->img_mcu_x = (s->img_x + z->img_mcu_w-1) / z->img_mcu_w; - z->img_mcu_y = (s->img_y + z->img_mcu_h-1) / z->img_mcu_h; - - for (i=0; i < s->img_n; ++i) { - // number of effective pixels (e.g. for non-interleaved MCU) - z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max-1) / h_max; - z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max-1) / v_max; - // to simplify generation, we'll allocate enough memory to decode - // the bogus oversized data from using interleaved MCUs and their - // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't - // discard the extra data until colorspace conversion - // - // img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked earlier) - // so these muls can't overflow with 32-bit ints (which we require) - z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8; - z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8; - z->img_comp[i].coeff = 0; - z->img_comp[i].raw_coeff = 0; - z->img_comp[i].linebuf = NULL; - z->img_comp[i].raw_data = stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15); - if (z->img_comp[i].raw_data == NULL) - return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory")); - // align blocks for idct using mmx/sse - z->img_comp[i].data = (stbi_uc*) (((size_t) z->img_comp[i].raw_data + 15) & ~15); - if (z->progressive) { - // w2, h2 are multiples of 8 (see above) - z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8; - z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8; - z->img_comp[i].raw_coeff = stbi__malloc_mad3(z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15); - if (z->img_comp[i].raw_coeff == NULL) - return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory")); - z->img_comp[i].coeff = (short*) (((size_t) z->img_comp[i].raw_coeff + 15) & ~15); - } - } - - return 1; -} - -// use comparisons since in some cases we handle more than one case (e.g. SOF) -#define stbi__DNL(x) ((x) == 0xdc) -#define stbi__SOI(x) ((x) == 0xd8) -#define stbi__EOI(x) ((x) == 0xd9) -#define stbi__SOF(x) ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2) -#define stbi__SOS(x) ((x) == 0xda) - -#define stbi__SOF_progressive(x) ((x) == 0xc2) - -static int stbi__decode_jpeg_header(stbi__jpeg *z, int scan) -{ - int m; - z->jfif = 0; - z->app14_color_transform = -1; // valid values are 0,1,2 - z->marker = STBI__MARKER_none; // initialize cached marker to empty - m = stbi__get_marker(z); - if (!stbi__SOI(m)) return stbi__err("no SOI","Corrupt JPEG"); - if (scan == STBI__SCAN_type) return 1; - m = stbi__get_marker(z); - while (!stbi__SOF(m)) { - if (!stbi__process_marker(z,m)) return 0; - m = stbi__get_marker(z); - while (m == STBI__MARKER_none) { - // some files have extra padding after their blocks, so ok, we'll scan - if (stbi__at_eof(z->s)) return stbi__err("no SOF", "Corrupt JPEG"); - m = stbi__get_marker(z); - } - } - z->progressive = stbi__SOF_progressive(m); - if (!stbi__process_frame_header(z, scan)) return 0; - return 1; -} - -// decode image to YCbCr format -static int stbi__decode_jpeg_image(stbi__jpeg *j) -{ - int m; - for (m = 0; m < 4; m++) { - j->img_comp[m].raw_data = NULL; - j->img_comp[m].raw_coeff = NULL; - } - j->restart_interval = 0; - if (!stbi__decode_jpeg_header(j, STBI__SCAN_load)) return 0; - m = stbi__get_marker(j); - while (!stbi__EOI(m)) { - if (stbi__SOS(m)) { - if (!stbi__process_scan_header(j)) return 0; - if (!stbi__parse_entropy_coded_data(j)) return 0; - if (j->marker == STBI__MARKER_none ) { - // handle 0s at the end of image data from IP Kamera 9060 - while (!stbi__at_eof(j->s)) { - int x = stbi__get8(j->s); - if (x == 255) { - j->marker = stbi__get8(j->s); - break; - } - } - // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0 - } - } else if (stbi__DNL(m)) { - int Ld = stbi__get16be(j->s); - stbi__uint32 NL = stbi__get16be(j->s); - if (Ld != 4) return stbi__err("bad DNL len", "Corrupt JPEG"); - if (NL != j->s->img_y) return stbi__err("bad DNL height", "Corrupt JPEG"); - } else { - if (!stbi__process_marker(j, m)) return 0; - } - m = stbi__get_marker(j); - } - if (j->progressive) - stbi__jpeg_finish(j); - return 1; -} - -// static jfif-centered resampling (across block boundaries) - -typedef stbi_uc *(*resample_row_func)(stbi_uc *out, stbi_uc *in0, stbi_uc *in1, - int w, int hs); - -#define stbi__div4(x) ((stbi_uc) ((x) >> 2)) - -static stbi_uc *resample_row_1(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) -{ - STBI_NOTUSED(out); - STBI_NOTUSED(in_far); - STBI_NOTUSED(w); - STBI_NOTUSED(hs); - return in_near; -} - -static stbi_uc* stbi__resample_row_v_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) -{ - // need to generate two samples vertically for every one in input - int i; - STBI_NOTUSED(hs); - for (i=0; i < w; ++i) - out[i] = stbi__div4(3*in_near[i] + in_far[i] + 2); - return out; -} - -static stbi_uc* stbi__resample_row_h_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) -{ - // need to generate two samples horizontally for every one in input - int i; - stbi_uc *input = in_near; - - if (w == 1) { - // if only one sample, can't do any interpolation - out[0] = out[1] = input[0]; - return out; - } - - out[0] = input[0]; - out[1] = stbi__div4(input[0]*3 + input[1] + 2); - for (i=1; i < w-1; ++i) { - int n = 3*input[i]+2; - out[i*2+0] = stbi__div4(n+input[i-1]); - out[i*2+1] = stbi__div4(n+input[i+1]); - } - out[i*2+0] = stbi__div4(input[w-2]*3 + input[w-1] + 2); - out[i*2+1] = input[w-1]; - - STBI_NOTUSED(in_far); - STBI_NOTUSED(hs); - - return out; -} - -#define stbi__div16(x) ((stbi_uc) ((x) >> 4)) - -static stbi_uc *stbi__resample_row_hv_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) -{ - // need to generate 2x2 samples for every one in input - int i,t0,t1; - if (w == 1) { - out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2); - return out; - } - - t1 = 3*in_near[0] + in_far[0]; - out[0] = stbi__div4(t1+2); - for (i=1; i < w; ++i) { - t0 = t1; - t1 = 3*in_near[i]+in_far[i]; - out[i*2-1] = stbi__div16(3*t0 + t1 + 8); - out[i*2 ] = stbi__div16(3*t1 + t0 + 8); - } - out[w*2-1] = stbi__div4(t1+2); - - STBI_NOTUSED(hs); - - return out; -} - -#if defined(STBI_SSE2) || defined(STBI_NEON) -static stbi_uc *stbi__resample_row_hv_2_simd(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) -{ - // need to generate 2x2 samples for every one in input - int i=0,t0,t1; - - if (w == 1) { - out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2); - return out; - } - - t1 = 3*in_near[0] + in_far[0]; - // process groups of 8 pixels for as long as we can. - // note we can't handle the last pixel in a row in this loop - // because we need to handle the filter boundary conditions. - for (; i < ((w-1) & ~7); i += 8) { -#if defined(STBI_SSE2) - // load and perform the vertical filtering pass - // this uses 3*x + y = 4*x + (y - x) - __m128i zero = _mm_setzero_si128(); - __m128i farb = _mm_loadl_epi64((__m128i *) (in_far + i)); - __m128i nearb = _mm_loadl_epi64((__m128i *) (in_near + i)); - __m128i farw = _mm_unpacklo_epi8(farb, zero); - __m128i nearw = _mm_unpacklo_epi8(nearb, zero); - __m128i diff = _mm_sub_epi16(farw, nearw); - __m128i nears = _mm_slli_epi16(nearw, 2); - __m128i curr = _mm_add_epi16(nears, diff); // current row - - // horizontal filter works the same based on shifted vers of current - // row. "prev" is current row shifted right by 1 pixel; we need to - // insert the previous pixel value (from t1). - // "next" is current row shifted left by 1 pixel, with first pixel - // of next block of 8 pixels added in. - __m128i prv0 = _mm_slli_si128(curr, 2); - __m128i nxt0 = _mm_srli_si128(curr, 2); - __m128i prev = _mm_insert_epi16(prv0, t1, 0); - __m128i next = _mm_insert_epi16(nxt0, 3*in_near[i+8] + in_far[i+8], 7); - - // horizontal filter, polyphase implementation since it's convenient: - // even pixels = 3*cur + prev = cur*4 + (prev - cur) - // odd pixels = 3*cur + next = cur*4 + (next - cur) - // note the shared term. - __m128i bias = _mm_set1_epi16(8); - __m128i curs = _mm_slli_epi16(curr, 2); - __m128i prvd = _mm_sub_epi16(prev, curr); - __m128i nxtd = _mm_sub_epi16(next, curr); - __m128i curb = _mm_add_epi16(curs, bias); - __m128i even = _mm_add_epi16(prvd, curb); - __m128i odd = _mm_add_epi16(nxtd, curb); - - // interleave even and odd pixels, then undo scaling. - __m128i int0 = _mm_unpacklo_epi16(even, odd); - __m128i int1 = _mm_unpackhi_epi16(even, odd); - __m128i de0 = _mm_srli_epi16(int0, 4); - __m128i de1 = _mm_srli_epi16(int1, 4); - - // pack and write output - __m128i outv = _mm_packus_epi16(de0, de1); - _mm_storeu_si128((__m128i *) (out + i*2), outv); -#elif defined(STBI_NEON) - // load and perform the vertical filtering pass - // this uses 3*x + y = 4*x + (y - x) - uint8x8_t farb = vld1_u8(in_far + i); - uint8x8_t nearb = vld1_u8(in_near + i); - int16x8_t diff = vreinterpretq_s16_u16(vsubl_u8(farb, nearb)); - int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2)); - int16x8_t curr = vaddq_s16(nears, diff); // current row - - // horizontal filter works the same based on shifted vers of current - // row. "prev" is current row shifted right by 1 pixel; we need to - // insert the previous pixel value (from t1). - // "next" is current row shifted left by 1 pixel, with first pixel - // of next block of 8 pixels added in. - int16x8_t prv0 = vextq_s16(curr, curr, 7); - int16x8_t nxt0 = vextq_s16(curr, curr, 1); - int16x8_t prev = vsetq_lane_s16(t1, prv0, 0); - int16x8_t next = vsetq_lane_s16(3*in_near[i+8] + in_far[i+8], nxt0, 7); - - // horizontal filter, polyphase implementation since it's convenient: - // even pixels = 3*cur + prev = cur*4 + (prev - cur) - // odd pixels = 3*cur + next = cur*4 + (next - cur) - // note the shared term. - int16x8_t curs = vshlq_n_s16(curr, 2); - int16x8_t prvd = vsubq_s16(prev, curr); - int16x8_t nxtd = vsubq_s16(next, curr); - int16x8_t even = vaddq_s16(curs, prvd); - int16x8_t odd = vaddq_s16(curs, nxtd); - - // undo scaling and round, then store with even/odd phases interleaved - uint8x8x2_t o; - o.val[0] = vqrshrun_n_s16(even, 4); - o.val[1] = vqrshrun_n_s16(odd, 4); - vst2_u8(out + i*2, o); -#endif - - // "previous" value for next iter - t1 = 3*in_near[i+7] + in_far[i+7]; - } - - t0 = t1; - t1 = 3*in_near[i] + in_far[i]; - out[i*2] = stbi__div16(3*t1 + t0 + 8); - - for (++i; i < w; ++i) { - t0 = t1; - t1 = 3*in_near[i]+in_far[i]; - out[i*2-1] = stbi__div16(3*t0 + t1 + 8); - out[i*2 ] = stbi__div16(3*t1 + t0 + 8); - } - out[w*2-1] = stbi__div4(t1+2); - - STBI_NOTUSED(hs); - - return out; -} -#endif - -static stbi_uc *stbi__resample_row_generic(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) -{ - // resample with nearest-neighbor - int i,j; - STBI_NOTUSED(in_far); - for (i=0; i < w; ++i) - for (j=0; j < hs; ++j) - out[i*hs+j] = in_near[i]; - return out; -} - -// this is a reduced-precision calculation of YCbCr-to-RGB introduced -// to make sure the code produces the same results in both SIMD and scalar -#define stbi__float2fixed(x) (((int) ((x) * 4096.0f + 0.5f)) << 8) -static void stbi__YCbCr_to_RGB_row(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step) -{ - int i; - for (i=0; i < count; ++i) { - int y_fixed = (y[i] << 20) + (1<<19); // rounding - int r,g,b; - int cr = pcr[i] - 128; - int cb = pcb[i] - 128; - r = y_fixed + cr* stbi__float2fixed(1.40200f); - g = y_fixed + (cr*-stbi__float2fixed(0.71414f)) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000); - b = y_fixed + cb* stbi__float2fixed(1.77200f); - r >>= 20; - g >>= 20; - b >>= 20; - if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; } - if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; } - if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; } - out[0] = (stbi_uc)r; - out[1] = (stbi_uc)g; - out[2] = (stbi_uc)b; - out[3] = 255; - out += step; - } -} - -#if defined(STBI_SSE2) || defined(STBI_NEON) -static void stbi__YCbCr_to_RGB_simd(stbi_uc *out, stbi_uc const *y, stbi_uc const *pcb, stbi_uc const *pcr, int count, int step) -{ - int i = 0; - -#ifdef STBI_SSE2 - // step == 3 is pretty ugly on the final interleave, and i'm not convinced - // it's useful in practice (you wouldn't use it for textures, for example). - // so just accelerate step == 4 case. - if (step == 4) { - // this is a fairly straightforward implementation and not super-optimized. - __m128i signflip = _mm_set1_epi8(-0x80); - __m128i cr_const0 = _mm_set1_epi16( (short) ( 1.40200f*4096.0f+0.5f)); - __m128i cr_const1 = _mm_set1_epi16( - (short) ( 0.71414f*4096.0f+0.5f)); - __m128i cb_const0 = _mm_set1_epi16( - (short) ( 0.34414f*4096.0f+0.5f)); - __m128i cb_const1 = _mm_set1_epi16( (short) ( 1.77200f*4096.0f+0.5f)); - __m128i y_bias = _mm_set1_epi8((char) (unsigned char) 128); - __m128i xw = _mm_set1_epi16(255); // alpha channel - - for (; i+7 < count; i += 8) { - // load - __m128i y_bytes = _mm_loadl_epi64((__m128i *) (y+i)); - __m128i cr_bytes = _mm_loadl_epi64((__m128i *) (pcr+i)); - __m128i cb_bytes = _mm_loadl_epi64((__m128i *) (pcb+i)); - __m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128 - __m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128 - - // unpack to short (and left-shift cr, cb by 8) - __m128i yw = _mm_unpacklo_epi8(y_bias, y_bytes); - __m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased); - __m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased); - - // color transform - __m128i yws = _mm_srli_epi16(yw, 4); - __m128i cr0 = _mm_mulhi_epi16(cr_const0, crw); - __m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw); - __m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1); - __m128i cr1 = _mm_mulhi_epi16(crw, cr_const1); - __m128i rws = _mm_add_epi16(cr0, yws); - __m128i gwt = _mm_add_epi16(cb0, yws); - __m128i bws = _mm_add_epi16(yws, cb1); - __m128i gws = _mm_add_epi16(gwt, cr1); - - // descale - __m128i rw = _mm_srai_epi16(rws, 4); - __m128i bw = _mm_srai_epi16(bws, 4); - __m128i gw = _mm_srai_epi16(gws, 4); - - // back to byte, set up for transpose - __m128i brb = _mm_packus_epi16(rw, bw); - __m128i gxb = _mm_packus_epi16(gw, xw); - - // transpose to interleave channels - __m128i t0 = _mm_unpacklo_epi8(brb, gxb); - __m128i t1 = _mm_unpackhi_epi8(brb, gxb); - __m128i o0 = _mm_unpacklo_epi16(t0, t1); - __m128i o1 = _mm_unpackhi_epi16(t0, t1); - - // store - _mm_storeu_si128((__m128i *) (out + 0), o0); - _mm_storeu_si128((__m128i *) (out + 16), o1); - out += 32; - } - } -#endif - -#ifdef STBI_NEON - // in this version, step=3 support would be easy to add. but is there demand? - if (step == 4) { - // this is a fairly straightforward implementation and not super-optimized. - uint8x8_t signflip = vdup_n_u8(0x80); - int16x8_t cr_const0 = vdupq_n_s16( (short) ( 1.40200f*4096.0f+0.5f)); - int16x8_t cr_const1 = vdupq_n_s16( - (short) ( 0.71414f*4096.0f+0.5f)); - int16x8_t cb_const0 = vdupq_n_s16( - (short) ( 0.34414f*4096.0f+0.5f)); - int16x8_t cb_const1 = vdupq_n_s16( (short) ( 1.77200f*4096.0f+0.5f)); - - for (; i+7 < count; i += 8) { - // load - uint8x8_t y_bytes = vld1_u8(y + i); - uint8x8_t cr_bytes = vld1_u8(pcr + i); - uint8x8_t cb_bytes = vld1_u8(pcb + i); - int8x8_t cr_biased = vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip)); - int8x8_t cb_biased = vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip)); - - // expand to s16 - int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4)); - int16x8_t crw = vshll_n_s8(cr_biased, 7); - int16x8_t cbw = vshll_n_s8(cb_biased, 7); - - // color transform - int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0); - int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0); - int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1); - int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1); - int16x8_t rws = vaddq_s16(yws, cr0); - int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1); - int16x8_t bws = vaddq_s16(yws, cb1); - - // undo scaling, round, convert to byte - uint8x8x4_t o; - o.val[0] = vqrshrun_n_s16(rws, 4); - o.val[1] = vqrshrun_n_s16(gws, 4); - o.val[2] = vqrshrun_n_s16(bws, 4); - o.val[3] = vdup_n_u8(255); - - // store, interleaving r/g/b/a - vst4_u8(out, o); - out += 8*4; - } - } -#endif - - for (; i < count; ++i) { - int y_fixed = (y[i] << 20) + (1<<19); // rounding - int r,g,b; - int cr = pcr[i] - 128; - int cb = pcb[i] - 128; - r = y_fixed + cr* stbi__float2fixed(1.40200f); - g = y_fixed + cr*-stbi__float2fixed(0.71414f) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000); - b = y_fixed + cb* stbi__float2fixed(1.77200f); - r >>= 20; - g >>= 20; - b >>= 20; - if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; } - if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; } - if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; } - out[0] = (stbi_uc)r; - out[1] = (stbi_uc)g; - out[2] = (stbi_uc)b; - out[3] = 255; - out += step; - } -} -#endif - -// set up the kernels -static void stbi__setup_jpeg(stbi__jpeg *j) -{ - j->idct_block_kernel = stbi__idct_block; - j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row; - j->resample_row_hv_2_kernel = stbi__resample_row_hv_2; - -#ifdef STBI_SSE2 - if (stbi__sse2_available()) { - j->idct_block_kernel = stbi__idct_simd; - j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; - j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; - } -#endif - -#ifdef STBI_NEON - j->idct_block_kernel = stbi__idct_simd; - j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; - j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; -#endif -} - -// clean up the temporary component buffers -static void stbi__cleanup_jpeg(stbi__jpeg *j) -{ - stbi__free_jpeg_components(j, j->s->img_n, 0); -} - -typedef struct -{ - resample_row_func resample; - stbi_uc *line0,*line1; - int hs,vs; // expansion factor in each axis - int w_lores; // horizontal pixels pre-expansion - int ystep; // how far through vertical expansion we are - int ypos; // which pre-expansion row we're on -} stbi__resample; - -// fast 0..255 * 0..255 => 0..255 rounded multiplication -static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y) -{ - unsigned int t = x*y + 128; - return (stbi_uc) ((t + (t >>8)) >> 8); -} - -static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp, int req_comp) -{ - int n, decode_n, is_rgb; - z->s->img_n = 0; // make stbi__cleanup_jpeg safe - - // validate req_comp - if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error"); - - // load a jpeg image from whichever source, but leave in YCbCr format - if (!stbi__decode_jpeg_image(z)) { stbi__cleanup_jpeg(z); return NULL; } - - // determine actual number of components to generate - n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1; - - is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif)); - - if (z->s->img_n == 3 && n < 3 && !is_rgb) - decode_n = 1; - else - decode_n = z->s->img_n; - - // nothing to do if no components requested; check this now to avoid - // accessing uninitialized coutput[0] later - if (decode_n <= 0) { stbi__cleanup_jpeg(z); return NULL; } - - // resample and color-convert - { - int k; - unsigned int i,j; - stbi_uc *output; - stbi_uc *coutput[4] = { NULL, NULL, NULL, NULL }; - - stbi__resample res_comp[4]; - - for (k=0; k < decode_n; ++k) { - stbi__resample *r = &res_comp[k]; - - // allocate line buffer big enough for upsampling off the edges - // with upsample factor of 4 - z->img_comp[k].linebuf = (stbi_uc *) stbi__malloc(z->s->img_x + 3); - if (!z->img_comp[k].linebuf) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); } - - r->hs = z->img_h_max / z->img_comp[k].h; - r->vs = z->img_v_max / z->img_comp[k].v; - r->ystep = r->vs >> 1; - r->w_lores = (z->s->img_x + r->hs-1) / r->hs; - r->ypos = 0; - r->line0 = r->line1 = z->img_comp[k].data; - - if (r->hs == 1 && r->vs == 1) r->resample = resample_row_1; - else if (r->hs == 1 && r->vs == 2) r->resample = stbi__resample_row_v_2; - else if (r->hs == 2 && r->vs == 1) r->resample = stbi__resample_row_h_2; - else if (r->hs == 2 && r->vs == 2) r->resample = z->resample_row_hv_2_kernel; - else r->resample = stbi__resample_row_generic; - } - - // can't error after this so, this is safe - output = (stbi_uc *) stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1); - if (!output) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); } - - // now go ahead and resample - for (j=0; j < z->s->img_y; ++j) { - stbi_uc *out = output + n * z->s->img_x * j; - for (k=0; k < decode_n; ++k) { - stbi__resample *r = &res_comp[k]; - int y_bot = r->ystep >= (r->vs >> 1); - coutput[k] = r->resample(z->img_comp[k].linebuf, - y_bot ? r->line1 : r->line0, - y_bot ? r->line0 : r->line1, - r->w_lores, r->hs); - if (++r->ystep >= r->vs) { - r->ystep = 0; - r->line0 = r->line1; - if (++r->ypos < z->img_comp[k].y) - r->line1 += z->img_comp[k].w2; - } - } - if (n >= 3) { - stbi_uc *y = coutput[0]; - if (z->s->img_n == 3) { - if (is_rgb) { - for (i=0; i < z->s->img_x; ++i) { - out[0] = y[i]; - out[1] = coutput[1][i]; - out[2] = coutput[2][i]; - out[3] = 255; - out += n; - } - } else { - z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); - } - } else if (z->s->img_n == 4) { - if (z->app14_color_transform == 0) { // CMYK - for (i=0; i < z->s->img_x; ++i) { - stbi_uc m = coutput[3][i]; - out[0] = stbi__blinn_8x8(coutput[0][i], m); - out[1] = stbi__blinn_8x8(coutput[1][i], m); - out[2] = stbi__blinn_8x8(coutput[2][i], m); - out[3] = 255; - out += n; - } - } else if (z->app14_color_transform == 2) { // YCCK - z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); - for (i=0; i < z->s->img_x; ++i) { - stbi_uc m = coutput[3][i]; - out[0] = stbi__blinn_8x8(255 - out[0], m); - out[1] = stbi__blinn_8x8(255 - out[1], m); - out[2] = stbi__blinn_8x8(255 - out[2], m); - out += n; - } - } else { // YCbCr + alpha? Ignore the fourth channel for now - z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); - } - } else - for (i=0; i < z->s->img_x; ++i) { - out[0] = out[1] = out[2] = y[i]; - out[3] = 255; // not used if n==3 - out += n; - } - } else { - if (is_rgb) { - if (n == 1) - for (i=0; i < z->s->img_x; ++i) - *out++ = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); - else { - for (i=0; i < z->s->img_x; ++i, out += 2) { - out[0] = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); - out[1] = 255; - } - } - } else if (z->s->img_n == 4 && z->app14_color_transform == 0) { - for (i=0; i < z->s->img_x; ++i) { - stbi_uc m = coutput[3][i]; - stbi_uc r = stbi__blinn_8x8(coutput[0][i], m); - stbi_uc g = stbi__blinn_8x8(coutput[1][i], m); - stbi_uc b = stbi__blinn_8x8(coutput[2][i], m); - out[0] = stbi__compute_y(r, g, b); - out[1] = 255; - out += n; - } - } else if (z->s->img_n == 4 && z->app14_color_transform == 2) { - for (i=0; i < z->s->img_x; ++i) { - out[0] = stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]); - out[1] = 255; - out += n; - } - } else { - stbi_uc *y = coutput[0]; - if (n == 1) - for (i=0; i < z->s->img_x; ++i) out[i] = y[i]; - else - for (i=0; i < z->s->img_x; ++i) { *out++ = y[i]; *out++ = 255; } - } - } - } - stbi__cleanup_jpeg(z); - *out_x = z->s->img_x; - *out_y = z->s->img_y; - if (comp) *comp = z->s->img_n >= 3 ? 3 : 1; // report original components, not output - return output; - } -} - -static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) -{ - unsigned char* result; - stbi__jpeg* j = (stbi__jpeg*) stbi__malloc(sizeof(stbi__jpeg)); - if (!j) return stbi__errpuc("outofmem", "Out of memory"); - STBI_NOTUSED(ri); - j->s = s; - stbi__setup_jpeg(j); - result = load_jpeg_image(j, x,y,comp,req_comp); - STBI_FREE(j); - return result; -} - -static int stbi__jpeg_test(stbi__context *s) -{ - int r; - stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg)); - if (!j) return stbi__err("outofmem", "Out of memory"); - j->s = s; - stbi__setup_jpeg(j); - r = stbi__decode_jpeg_header(j, STBI__SCAN_type); - stbi__rewind(s); - STBI_FREE(j); - return r; -} - -static int stbi__jpeg_info_raw(stbi__jpeg *j, int *x, int *y, int *comp) -{ - if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) { - stbi__rewind( j->s ); - return 0; - } - if (x) *x = j->s->img_x; - if (y) *y = j->s->img_y; - if (comp) *comp = j->s->img_n >= 3 ? 3 : 1; - return 1; -} - -static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp) -{ - int result; - stbi__jpeg* j = (stbi__jpeg*) (stbi__malloc(sizeof(stbi__jpeg))); - if (!j) return stbi__err("outofmem", "Out of memory"); - j->s = s; - result = stbi__jpeg_info_raw(j, x, y, comp); - STBI_FREE(j); - return result; -} -#endif - -// public domain zlib decode v0.2 Sean Barrett 2006-11-18 -// simple implementation -// - all input must be provided in an upfront buffer -// - all output is written to a single output buffer (can malloc/realloc) -// performance -// - fast huffman - -#ifndef STBI_NO_ZLIB - -// fast-way is faster to check than jpeg huffman, but slow way is slower -#define STBI__ZFAST_BITS 9 // accelerate all cases in default tables -#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1) -#define STBI__ZNSYMS 288 // number of symbols in literal/length alphabet - -// zlib-style huffman encoding -// (jpegs packs from left, zlib from right, so can't share code) -typedef struct -{ - stbi__uint16 fast[1 << STBI__ZFAST_BITS]; - stbi__uint16 firstcode[16]; - int maxcode[17]; - stbi__uint16 firstsymbol[16]; - stbi_uc size[STBI__ZNSYMS]; - stbi__uint16 value[STBI__ZNSYMS]; -} stbi__zhuffman; - -stbi_inline static int stbi__bitreverse16(int n) -{ - n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1); - n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2); - n = ((n & 0xF0F0) >> 4) | ((n & 0x0F0F) << 4); - n = ((n & 0xFF00) >> 8) | ((n & 0x00FF) << 8); - return n; -} - -stbi_inline static int stbi__bit_reverse(int v, int bits) -{ - STBI_ASSERT(bits <= 16); - // to bit reverse n bits, reverse 16 and shift - // e.g. 11 bits, bit reverse and shift away 5 - return stbi__bitreverse16(v) >> (16-bits); -} - -static int stbi__zbuild_huffman(stbi__zhuffman *z, const stbi_uc *sizelist, int num) -{ - int i,k=0; - int code, next_code[16], sizes[17]; - - // DEFLATE spec for generating codes - memset(sizes, 0, sizeof(sizes)); - memset(z->fast, 0, sizeof(z->fast)); - for (i=0; i < num; ++i) - ++sizes[sizelist[i]]; - sizes[0] = 0; - for (i=1; i < 16; ++i) - if (sizes[i] > (1 << i)) - return stbi__err("bad sizes", "Corrupt PNG"); - code = 0; - for (i=1; i < 16; ++i) { - next_code[i] = code; - z->firstcode[i] = (stbi__uint16) code; - z->firstsymbol[i] = (stbi__uint16) k; - code = (code + sizes[i]); - if (sizes[i]) - if (code-1 >= (1 << i)) return stbi__err("bad codelengths","Corrupt PNG"); - z->maxcode[i] = code << (16-i); // preshift for inner loop - code <<= 1; - k += sizes[i]; - } - z->maxcode[16] = 0x10000; // sentinel - for (i=0; i < num; ++i) { - int s = sizelist[i]; - if (s) { - int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s]; - stbi__uint16 fastv = (stbi__uint16) ((s << 9) | i); - z->size [c] = (stbi_uc ) s; - z->value[c] = (stbi__uint16) i; - if (s <= STBI__ZFAST_BITS) { - int j = stbi__bit_reverse(next_code[s],s); - while (j < (1 << STBI__ZFAST_BITS)) { - z->fast[j] = fastv; - j += (1 << s); - } - } - ++next_code[s]; - } - } - return 1; -} - -// zlib-from-memory implementation for PNG reading -// because PNG allows splitting the zlib stream arbitrarily, -// and it's annoying structurally to have PNG call ZLIB call PNG, -// we require PNG read all the IDATs and combine them into a single -// memory buffer - -typedef struct -{ - stbi_uc *zbuffer, *zbuffer_end; - int num_bits; - stbi__uint32 code_buffer; - - char *zout; - char *zout_start; - char *zout_end; - int z_expandable; - - stbi__zhuffman z_length, z_distance; -} stbi__zbuf; - -stbi_inline static int stbi__zeof(stbi__zbuf *z) -{ - return (z->zbuffer >= z->zbuffer_end); -} - -stbi_inline static stbi_uc stbi__zget8(stbi__zbuf *z) -{ - return stbi__zeof(z) ? 0 : *z->zbuffer++; -} - -static void stbi__fill_bits(stbi__zbuf *z) -{ - do { - if (z->code_buffer >= (1U << z->num_bits)) { - z->zbuffer = z->zbuffer_end; /* treat this as EOF so we fail. */ - return; - } - z->code_buffer |= (unsigned int) stbi__zget8(z) << z->num_bits; - z->num_bits += 8; - } while (z->num_bits <= 24); -} - -stbi_inline static unsigned int stbi__zreceive(stbi__zbuf *z, int n) -{ - unsigned int k; - if (z->num_bits < n) stbi__fill_bits(z); - k = z->code_buffer & ((1 << n) - 1); - z->code_buffer >>= n; - z->num_bits -= n; - return k; -} - -static int stbi__zhuffman_decode_slowpath(stbi__zbuf *a, stbi__zhuffman *z) -{ - int b,s,k; - // not resolved by fast table, so compute it the slow way - // use jpeg approach, which requires MSbits at top - k = stbi__bit_reverse(a->code_buffer, 16); - for (s=STBI__ZFAST_BITS+1; ; ++s) - if (k < z->maxcode[s]) - break; - if (s >= 16) return -1; // invalid code! - // code size is s, so: - b = (k >> (16-s)) - z->firstcode[s] + z->firstsymbol[s]; - if (b >= STBI__ZNSYMS) return -1; // some data was corrupt somewhere! - if (z->size[b] != s) return -1; // was originally an assert, but report failure instead. - a->code_buffer >>= s; - a->num_bits -= s; - return z->value[b]; -} - -stbi_inline static int stbi__zhuffman_decode(stbi__zbuf *a, stbi__zhuffman *z) -{ - int b,s; - if (a->num_bits < 16) { - if (stbi__zeof(a)) { - return -1; /* report error for unexpected end of data. */ - } - stbi__fill_bits(a); - } - b = z->fast[a->code_buffer & STBI__ZFAST_MASK]; - if (b) { - s = b >> 9; - a->code_buffer >>= s; - a->num_bits -= s; - return b & 511; - } - return stbi__zhuffman_decode_slowpath(a, z); -} - -static int stbi__zexpand(stbi__zbuf *z, char *zout, int n) // need to make room for n bytes -{ - char *q; - unsigned int cur, limit, old_limit; - z->zout = zout; - if (!z->z_expandable) return stbi__err("output buffer limit","Corrupt PNG"); - cur = (unsigned int) (z->zout - z->zout_start); - limit = old_limit = (unsigned) (z->zout_end - z->zout_start); - if (UINT_MAX - cur < (unsigned) n) return stbi__err("outofmem", "Out of memory"); - while (cur + n > limit) { - if(limit > UINT_MAX / 2) return stbi__err("outofmem", "Out of memory"); - limit *= 2; - } - q = (char *) STBI_REALLOC_SIZED(z->zout_start, old_limit, limit); - STBI_NOTUSED(old_limit); - if (q == NULL) return stbi__err("outofmem", "Out of memory"); - z->zout_start = q; - z->zout = q + cur; - z->zout_end = q + limit; - return 1; -} - -static const int stbi__zlength_base[31] = { - 3,4,5,6,7,8,9,10,11,13, - 15,17,19,23,27,31,35,43,51,59, - 67,83,99,115,131,163,195,227,258,0,0 }; - -static const int stbi__zlength_extra[31]= -{ 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 }; - -static const int stbi__zdist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193, -257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0}; - -static const int stbi__zdist_extra[32] = -{ 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13}; - -static int stbi__parse_huffman_block(stbi__zbuf *a) -{ - char *zout = a->zout; - for(;;) { - int z = stbi__zhuffman_decode(a, &a->z_length); - if (z < 256) { - if (z < 0) return stbi__err("bad huffman code","Corrupt PNG"); // error in huffman codes - if (zout >= a->zout_end) { - if (!stbi__zexpand(a, zout, 1)) return 0; - zout = a->zout; - } - *zout++ = (char) z; - } else { - stbi_uc *p; - int len,dist; - if (z == 256) { - a->zout = zout; - return 1; - } - z -= 257; - len = stbi__zlength_base[z]; - if (stbi__zlength_extra[z]) len += stbi__zreceive(a, stbi__zlength_extra[z]); - z = stbi__zhuffman_decode(a, &a->z_distance); - if (z < 0) return stbi__err("bad huffman code","Corrupt PNG"); - dist = stbi__zdist_base[z]; - if (stbi__zdist_extra[z]) dist += stbi__zreceive(a, stbi__zdist_extra[z]); - if (zout - a->zout_start < dist) return stbi__err("bad dist","Corrupt PNG"); - if (zout + len > a->zout_end) { - if (!stbi__zexpand(a, zout, len)) return 0; - zout = a->zout; - } - p = (stbi_uc *) (zout - dist); - if (dist == 1) { // run of one byte; common in images. - stbi_uc v = *p; - if (len) { do *zout++ = v; while (--len); } - } else { - if (len) { do *zout++ = *p++; while (--len); } - } - } - } -} - -static int stbi__compute_huffman_codes(stbi__zbuf *a) -{ - static const stbi_uc length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 }; - stbi__zhuffman z_codelength; - stbi_uc lencodes[286+32+137];//padding for maximum single op - stbi_uc codelength_sizes[19]; - int i,n; - - int hlit = stbi__zreceive(a,5) + 257; - int hdist = stbi__zreceive(a,5) + 1; - int hclen = stbi__zreceive(a,4) + 4; - int ntot = hlit + hdist; - - memset(codelength_sizes, 0, sizeof(codelength_sizes)); - for (i=0; i < hclen; ++i) { - int s = stbi__zreceive(a,3); - codelength_sizes[length_dezigzag[i]] = (stbi_uc) s; - } - if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19)) return 0; - - n = 0; - while (n < ntot) { - int c = stbi__zhuffman_decode(a, &z_codelength); - if (c < 0 || c >= 19) return stbi__err("bad codelengths", "Corrupt PNG"); - if (c < 16) - lencodes[n++] = (stbi_uc) c; - else { - stbi_uc fill = 0; - if (c == 16) { - c = stbi__zreceive(a,2)+3; - if (n == 0) return stbi__err("bad codelengths", "Corrupt PNG"); - fill = lencodes[n-1]; - } else if (c == 17) { - c = stbi__zreceive(a,3)+3; - } else if (c == 18) { - c = stbi__zreceive(a,7)+11; - } else { - return stbi__err("bad codelengths", "Corrupt PNG"); - } - if (ntot - n < c) return stbi__err("bad codelengths", "Corrupt PNG"); - memset(lencodes+n, fill, c); - n += c; - } - } - if (n != ntot) return stbi__err("bad codelengths","Corrupt PNG"); - if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit)) return 0; - if (!stbi__zbuild_huffman(&a->z_distance, lencodes+hlit, hdist)) return 0; - return 1; -} - -static int stbi__parse_uncompressed_block(stbi__zbuf *a) -{ - stbi_uc header[4]; - int len,nlen,k; - if (a->num_bits & 7) - stbi__zreceive(a, a->num_bits & 7); // discard - // drain the bit-packed data into header - k = 0; - while (a->num_bits > 0) { - header[k++] = (stbi_uc) (a->code_buffer & 255); // suppress MSVC run-time check - a->code_buffer >>= 8; - a->num_bits -= 8; - } - if (a->num_bits < 0) return stbi__err("zlib corrupt","Corrupt PNG"); - // now fill header the normal way - while (k < 4) - header[k++] = stbi__zget8(a); - len = header[1] * 256 + header[0]; - nlen = header[3] * 256 + header[2]; - if (nlen != (len ^ 0xffff)) return stbi__err("zlib corrupt","Corrupt PNG"); - if (a->zbuffer + len > a->zbuffer_end) return stbi__err("read past buffer","Corrupt PNG"); - if (a->zout + len > a->zout_end) - if (!stbi__zexpand(a, a->zout, len)) return 0; - memcpy(a->zout, a->zbuffer, len); - a->zbuffer += len; - a->zout += len; - return 1; -} - -static int stbi__parse_zlib_header(stbi__zbuf *a) -{ - int cmf = stbi__zget8(a); - int cm = cmf & 15; - /* int cinfo = cmf >> 4; */ - int flg = stbi__zget8(a); - if (stbi__zeof(a)) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec - if ((cmf*256+flg) % 31 != 0) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec - if (flg & 32) return stbi__err("no preset dict","Corrupt PNG"); // preset dictionary not allowed in png - if (cm != 8) return stbi__err("bad compression","Corrupt PNG"); // DEFLATE required for png - // window = 1 << (8 + cinfo)... but who cares, we fully buffer output - return 1; -} - -static const stbi_uc stbi__zdefault_length[STBI__ZNSYMS] = -{ - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, - 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, - 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, - 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, - 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8 -}; -static const stbi_uc stbi__zdefault_distance[32] = -{ - 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5 -}; -/* -Init algorithm: -{ - int i; // use <= to match clearly with spec - for (i=0; i <= 143; ++i) stbi__zdefault_length[i] = 8; - for ( ; i <= 255; ++i) stbi__zdefault_length[i] = 9; - for ( ; i <= 279; ++i) stbi__zdefault_length[i] = 7; - for ( ; i <= 287; ++i) stbi__zdefault_length[i] = 8; - - for (i=0; i <= 31; ++i) stbi__zdefault_distance[i] = 5; -} -*/ - -static int stbi__parse_zlib(stbi__zbuf *a, int parse_header) -{ - int final, type; - if (parse_header) - if (!stbi__parse_zlib_header(a)) return 0; - a->num_bits = 0; - a->code_buffer = 0; - do { - final = stbi__zreceive(a,1); - type = stbi__zreceive(a,2); - if (type == 0) { - if (!stbi__parse_uncompressed_block(a)) return 0; - } else if (type == 3) { - return 0; - } else { - if (type == 1) { - // use fixed code lengths - if (!stbi__zbuild_huffman(&a->z_length , stbi__zdefault_length , STBI__ZNSYMS)) return 0; - if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance, 32)) return 0; - } else { - if (!stbi__compute_huffman_codes(a)) return 0; - } - if (!stbi__parse_huffman_block(a)) return 0; - } - } while (!final); - return 1; -} - -static int stbi__do_zlib(stbi__zbuf *a, char *obuf, int olen, int exp, int parse_header) -{ - a->zout_start = obuf; - a->zout = obuf; - a->zout_end = obuf + olen; - a->z_expandable = exp; - - return stbi__parse_zlib(a, parse_header); -} - -STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen) -{ - stbi__zbuf a; - char *p = (char *) stbi__malloc(initial_size); - if (p == NULL) return NULL; - a.zbuffer = (stbi_uc *) buffer; - a.zbuffer_end = (stbi_uc *) buffer + len; - if (stbi__do_zlib(&a, p, initial_size, 1, 1)) { - if (outlen) *outlen = (int) (a.zout - a.zout_start); - return a.zout_start; - } else { - STBI_FREE(a.zout_start); - return NULL; - } -} - -STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen) -{ - return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen); -} - -STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header) -{ - stbi__zbuf a; - char *p = (char *) stbi__malloc(initial_size); - if (p == NULL) return NULL; - a.zbuffer = (stbi_uc *) buffer; - a.zbuffer_end = (stbi_uc *) buffer + len; - if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) { - if (outlen) *outlen = (int) (a.zout - a.zout_start); - return a.zout_start; - } else { - STBI_FREE(a.zout_start); - return NULL; - } -} - -STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen) -{ - stbi__zbuf a; - a.zbuffer = (stbi_uc *) ibuffer; - a.zbuffer_end = (stbi_uc *) ibuffer + ilen; - if (stbi__do_zlib(&a, obuffer, olen, 0, 1)) - return (int) (a.zout - a.zout_start); - else - return -1; -} - -STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen) -{ - stbi__zbuf a; - char *p = (char *) stbi__malloc(16384); - if (p == NULL) return NULL; - a.zbuffer = (stbi_uc *) buffer; - a.zbuffer_end = (stbi_uc *) buffer+len; - if (stbi__do_zlib(&a, p, 16384, 1, 0)) { - if (outlen) *outlen = (int) (a.zout - a.zout_start); - return a.zout_start; - } else { - STBI_FREE(a.zout_start); - return NULL; - } -} - -STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen) -{ - stbi__zbuf a; - a.zbuffer = (stbi_uc *) ibuffer; - a.zbuffer_end = (stbi_uc *) ibuffer + ilen; - if (stbi__do_zlib(&a, obuffer, olen, 0, 0)) - return (int) (a.zout - a.zout_start); - else - return -1; -} -#endif - -// public domain "baseline" PNG decoder v0.10 Sean Barrett 2006-11-18 -// simple implementation -// - only 8-bit samples -// - no CRC checking -// - allocates lots of intermediate memory -// - avoids problem of streaming data between subsystems -// - avoids explicit window management -// performance -// - uses stb_zlib, a PD zlib implementation with fast huffman decoding - -#ifndef STBI_NO_PNG -typedef struct -{ - stbi__uint32 length; - stbi__uint32 type; -} stbi__pngchunk; - -static stbi__pngchunk stbi__get_chunk_header(stbi__context *s) -{ - stbi__pngchunk c; - c.length = stbi__get32be(s); - c.type = stbi__get32be(s); - return c; -} - -static int stbi__check_png_header(stbi__context *s) -{ - static const stbi_uc png_sig[8] = { 137,80,78,71,13,10,26,10 }; - int i; - for (i=0; i < 8; ++i) - if (stbi__get8(s) != png_sig[i]) return stbi__err("bad png sig","Not a PNG"); - return 1; -} - -typedef struct -{ - stbi__context *s; - stbi_uc *idata, *expanded, *out; - int depth; -} stbi__png; - - -enum { - STBI__F_none=0, - STBI__F_sub=1, - STBI__F_up=2, - STBI__F_avg=3, - STBI__F_paeth=4, - // synthetic filters used for first scanline to avoid needing a dummy row of 0s - STBI__F_avg_first, - STBI__F_paeth_first -}; - -static stbi_uc first_row_filter[5] = -{ - STBI__F_none, - STBI__F_sub, - STBI__F_none, - STBI__F_avg_first, - STBI__F_paeth_first -}; - -static int stbi__paeth(int a, int b, int c) -{ - int p = a + b - c; - int pa = abs(p-a); - int pb = abs(p-b); - int pc = abs(p-c); - if (pa <= pb && pa <= pc) return a; - if (pb <= pc) return b; - return c; -} - -static const stbi_uc stbi__depth_scale_table[9] = { 0, 0xff, 0x55, 0, 0x11, 0,0,0, 0x01 }; - -// create the png data from post-deflated data -static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, stbi__uint32 y, int depth, int color) -{ - int bytes = (depth == 16? 2 : 1); - stbi__context *s = a->s; - stbi__uint32 i,j,stride = x*out_n*bytes; - stbi__uint32 img_len, img_width_bytes; - int k; - int img_n = s->img_n; // copy it into a local for later - - int output_bytes = out_n*bytes; - int filter_bytes = img_n*bytes; - int width = x; - - STBI_ASSERT(out_n == s->img_n || out_n == s->img_n+1); - a->out = (stbi_uc *) stbi__malloc_mad3(x, y, output_bytes, 0); // extra bytes to write off the end into - if (!a->out) return stbi__err("outofmem", "Out of memory"); - - if (!stbi__mad3sizes_valid(img_n, x, depth, 7)) return stbi__err("too large", "Corrupt PNG"); - img_width_bytes = (((img_n * x * depth) + 7) >> 3); - img_len = (img_width_bytes + 1) * y; - - // we used to check for exact match between raw_len and img_len on non-interlaced PNGs, - // but issue #276 reported a PNG in the wild that had extra data at the end (all zeros), - // so just check for raw_len < img_len always. - if (raw_len < img_len) return stbi__err("not enough pixels","Corrupt PNG"); - - for (j=0; j < y; ++j) { - stbi_uc *cur = a->out + stride*j; - stbi_uc *prior; - int filter = *raw++; - - if (filter > 4) - return stbi__err("invalid filter","Corrupt PNG"); - - if (depth < 8) { - if (img_width_bytes > x) return stbi__err("invalid width","Corrupt PNG"); - cur += x*out_n - img_width_bytes; // store output to the rightmost img_len bytes, so we can decode in place - filter_bytes = 1; - width = img_width_bytes; - } - prior = cur - stride; // bugfix: need to compute this after 'cur +=' computation above - - // if first row, use special filter that doesn't sample previous row - if (j == 0) filter = first_row_filter[filter]; - - // handle first byte explicitly - for (k=0; k < filter_bytes; ++k) { - switch (filter) { - case STBI__F_none : cur[k] = raw[k]; break; - case STBI__F_sub : cur[k] = raw[k]; break; - case STBI__F_up : cur[k] = STBI__BYTECAST(raw[k] + prior[k]); break; - case STBI__F_avg : cur[k] = STBI__BYTECAST(raw[k] + (prior[k]>>1)); break; - case STBI__F_paeth : cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(0,prior[k],0)); break; - case STBI__F_avg_first : cur[k] = raw[k]; break; - case STBI__F_paeth_first: cur[k] = raw[k]; break; - } - } - - if (depth == 8) { - if (img_n != out_n) - cur[img_n] = 255; // first pixel - raw += img_n; - cur += out_n; - prior += out_n; - } else if (depth == 16) { - if (img_n != out_n) { - cur[filter_bytes] = 255; // first pixel top byte - cur[filter_bytes+1] = 255; // first pixel bottom byte - } - raw += filter_bytes; - cur += output_bytes; - prior += output_bytes; - } else { - raw += 1; - cur += 1; - prior += 1; - } - - // this is a little gross, so that we don't switch per-pixel or per-component - if (depth < 8 || img_n == out_n) { - int nk = (width - 1)*filter_bytes; - #define STBI__CASE(f) \ - case f: \ - for (k=0; k < nk; ++k) - switch (filter) { - // "none" filter turns into a memcpy here; make that explicit. - case STBI__F_none: memcpy(cur, raw, nk); break; - STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k-filter_bytes]); } break; - STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break; - STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k-filter_bytes])>>1)); } break; - STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],prior[k],prior[k-filter_bytes])); } break; - STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k-filter_bytes] >> 1)); } break; - STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],0,0)); } break; - } - #undef STBI__CASE - raw += nk; - } else { - STBI_ASSERT(img_n+1 == out_n); - #define STBI__CASE(f) \ - case f: \ - for (i=x-1; i >= 1; --i, cur[filter_bytes]=255,raw+=filter_bytes,cur+=output_bytes,prior+=output_bytes) \ - for (k=0; k < filter_bytes; ++k) - switch (filter) { - STBI__CASE(STBI__F_none) { cur[k] = raw[k]; } break; - STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k- output_bytes]); } break; - STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break; - STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k- output_bytes])>>1)); } break; - STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k- output_bytes],prior[k],prior[k- output_bytes])); } break; - STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k- output_bytes] >> 1)); } break; - STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k- output_bytes],0,0)); } break; - } - #undef STBI__CASE - - // the loop above sets the high byte of the pixels' alpha, but for - // 16 bit png files we also need the low byte set. we'll do that here. - if (depth == 16) { - cur = a->out + stride*j; // start at the beginning of the row again - for (i=0; i < x; ++i,cur+=output_bytes) { - cur[filter_bytes+1] = 255; - } - } - } - } - - // we make a separate pass to expand bits to pixels; for performance, - // this could run two scanlines behind the above code, so it won't - // intefere with filtering but will still be in the cache. - if (depth < 8) { - for (j=0; j < y; ++j) { - stbi_uc *cur = a->out + stride*j; - stbi_uc *in = a->out + stride*j + x*out_n - img_width_bytes; - // unpack 1/2/4-bit into a 8-bit buffer. allows us to keep the common 8-bit path optimal at minimal cost for 1/2/4-bit - // png guarante byte alignment, if width is not multiple of 8/4/2 we'll decode dummy trailing data that will be skipped in the later loop - stbi_uc scale = (color == 0) ? stbi__depth_scale_table[depth] : 1; // scale grayscale values to 0..255 range - - // note that the final byte might overshoot and write more data than desired. - // we can allocate enough data that this never writes out of memory, but it - // could also overwrite the next scanline. can it overwrite non-empty data - // on the next scanline? yes, consider 1-pixel-wide scanlines with 1-bit-per-pixel. - // so we need to explicitly clamp the final ones - - if (depth == 4) { - for (k=x*img_n; k >= 2; k-=2, ++in) { - *cur++ = scale * ((*in >> 4) ); - *cur++ = scale * ((*in ) & 0x0f); - } - if (k > 0) *cur++ = scale * ((*in >> 4) ); - } else if (depth == 2) { - for (k=x*img_n; k >= 4; k-=4, ++in) { - *cur++ = scale * ((*in >> 6) ); - *cur++ = scale * ((*in >> 4) & 0x03); - *cur++ = scale * ((*in >> 2) & 0x03); - *cur++ = scale * ((*in ) & 0x03); - } - if (k > 0) *cur++ = scale * ((*in >> 6) ); - if (k > 1) *cur++ = scale * ((*in >> 4) & 0x03); - if (k > 2) *cur++ = scale * ((*in >> 2) & 0x03); - } else if (depth == 1) { - for (k=x*img_n; k >= 8; k-=8, ++in) { - *cur++ = scale * ((*in >> 7) ); - *cur++ = scale * ((*in >> 6) & 0x01); - *cur++ = scale * ((*in >> 5) & 0x01); - *cur++ = scale * ((*in >> 4) & 0x01); - *cur++ = scale * ((*in >> 3) & 0x01); - *cur++ = scale * ((*in >> 2) & 0x01); - *cur++ = scale * ((*in >> 1) & 0x01); - *cur++ = scale * ((*in ) & 0x01); - } - if (k > 0) *cur++ = scale * ((*in >> 7) ); - if (k > 1) *cur++ = scale * ((*in >> 6) & 0x01); - if (k > 2) *cur++ = scale * ((*in >> 5) & 0x01); - if (k > 3) *cur++ = scale * ((*in >> 4) & 0x01); - if (k > 4) *cur++ = scale * ((*in >> 3) & 0x01); - if (k > 5) *cur++ = scale * ((*in >> 2) & 0x01); - if (k > 6) *cur++ = scale * ((*in >> 1) & 0x01); - } - if (img_n != out_n) { - int q; - // insert alpha = 255 - cur = a->out + stride*j; - if (img_n == 1) { - for (q=x-1; q >= 0; --q) { - cur[q*2+1] = 255; - cur[q*2+0] = cur[q]; - } - } else { - STBI_ASSERT(img_n == 3); - for (q=x-1; q >= 0; --q) { - cur[q*4+3] = 255; - cur[q*4+2] = cur[q*3+2]; - cur[q*4+1] = cur[q*3+1]; - cur[q*4+0] = cur[q*3+0]; - } - } - } - } - } else if (depth == 16) { - // force the image data from big-endian to platform-native. - // this is done in a separate pass due to the decoding relying - // on the data being untouched, but could probably be done - // per-line during decode if care is taken. - stbi_uc *cur = a->out; - stbi__uint16 *cur16 = (stbi__uint16*)cur; - - for(i=0; i < x*y*out_n; ++i,cur16++,cur+=2) { - *cur16 = (cur[0] << 8) | cur[1]; - } - } - - return 1; -} - -static int stbi__create_png_image(stbi__png *a, stbi_uc *image_data, stbi__uint32 image_data_len, int out_n, int depth, int color, int interlaced) -{ - int bytes = (depth == 16 ? 2 : 1); - int out_bytes = out_n * bytes; - stbi_uc *final; - int p; - if (!interlaced) - return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color); - - // de-interlacing - final = (stbi_uc *) stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0); - if (!final) return stbi__err("outofmem", "Out of memory"); - for (p=0; p < 7; ++p) { - int xorig[] = { 0,4,0,2,0,1,0 }; - int yorig[] = { 0,0,4,0,2,0,1 }; - int xspc[] = { 8,8,4,4,2,2,1 }; - int yspc[] = { 8,8,8,4,4,2,2 }; - int i,j,x,y; - // pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1 - x = (a->s->img_x - xorig[p] + xspc[p]-1) / xspc[p]; - y = (a->s->img_y - yorig[p] + yspc[p]-1) / yspc[p]; - if (x && y) { - stbi__uint32 img_len = ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y; - if (!stbi__create_png_image_raw(a, image_data, image_data_len, out_n, x, y, depth, color)) { - STBI_FREE(final); - return 0; - } - for (j=0; j < y; ++j) { - for (i=0; i < x; ++i) { - int out_y = j*yspc[p]+yorig[p]; - int out_x = i*xspc[p]+xorig[p]; - memcpy(final + out_y*a->s->img_x*out_bytes + out_x*out_bytes, - a->out + (j*x+i)*out_bytes, out_bytes); - } - } - STBI_FREE(a->out); - image_data += img_len; - image_data_len -= img_len; - } - } - a->out = final; - - return 1; -} - -static int stbi__compute_transparency(stbi__png *z, stbi_uc tc[3], int out_n) -{ - stbi__context *s = z->s; - stbi__uint32 i, pixel_count = s->img_x * s->img_y; - stbi_uc *p = z->out; - - // compute color-based transparency, assuming we've - // already got 255 as the alpha value in the output - STBI_ASSERT(out_n == 2 || out_n == 4); - - if (out_n == 2) { - for (i=0; i < pixel_count; ++i) { - p[1] = (p[0] == tc[0] ? 0 : 255); - p += 2; - } - } else { - for (i=0; i < pixel_count; ++i) { - if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) - p[3] = 0; - p += 4; - } - } - return 1; -} - -static int stbi__compute_transparency16(stbi__png *z, stbi__uint16 tc[3], int out_n) -{ - stbi__context *s = z->s; - stbi__uint32 i, pixel_count = s->img_x * s->img_y; - stbi__uint16 *p = (stbi__uint16*) z->out; - - // compute color-based transparency, assuming we've - // already got 65535 as the alpha value in the output - STBI_ASSERT(out_n == 2 || out_n == 4); - - if (out_n == 2) { - for (i = 0; i < pixel_count; ++i) { - p[1] = (p[0] == tc[0] ? 0 : 65535); - p += 2; - } - } else { - for (i = 0; i < pixel_count; ++i) { - if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) - p[3] = 0; - p += 4; - } - } - return 1; -} - -static int stbi__expand_png_palette(stbi__png *a, stbi_uc *palette, int len, int pal_img_n) -{ - stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y; - stbi_uc *p, *temp_out, *orig = a->out; - - p = (stbi_uc *) stbi__malloc_mad2(pixel_count, pal_img_n, 0); - if (p == NULL) return stbi__err("outofmem", "Out of memory"); - - // between here and free(out) below, exitting would leak - temp_out = p; - - if (pal_img_n == 3) { - for (i=0; i < pixel_count; ++i) { - int n = orig[i]*4; - p[0] = palette[n ]; - p[1] = palette[n+1]; - p[2] = palette[n+2]; - p += 3; - } - } else { - for (i=0; i < pixel_count; ++i) { - int n = orig[i]*4; - p[0] = palette[n ]; - p[1] = palette[n+1]; - p[2] = palette[n+2]; - p[3] = palette[n+3]; - p += 4; - } - } - STBI_FREE(a->out); - a->out = temp_out; - - STBI_NOTUSED(len); - - return 1; -} - -static int stbi__unpremultiply_on_load_global = 0; -static int stbi__de_iphone_flag_global = 0; - -STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply) -{ - stbi__unpremultiply_on_load_global = flag_true_if_should_unpremultiply; -} - -STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert) -{ - stbi__de_iphone_flag_global = flag_true_if_should_convert; -} - -#ifndef STBI_THREAD_LOCAL -#define stbi__unpremultiply_on_load stbi__unpremultiply_on_load_global -#define stbi__de_iphone_flag stbi__de_iphone_flag_global -#else -static STBI_THREAD_LOCAL int stbi__unpremultiply_on_load_local, stbi__unpremultiply_on_load_set; -static STBI_THREAD_LOCAL int stbi__de_iphone_flag_local, stbi__de_iphone_flag_set; - -STBIDEF void stbi__unpremultiply_on_load_thread(int flag_true_if_should_unpremultiply) -{ - stbi__unpremultiply_on_load_local = flag_true_if_should_unpremultiply; - stbi__unpremultiply_on_load_set = 1; -} - -STBIDEF void stbi_convert_iphone_png_to_rgb_thread(int flag_true_if_should_convert) -{ - stbi__de_iphone_flag_local = flag_true_if_should_convert; - stbi__de_iphone_flag_set = 1; -} - -#define stbi__unpremultiply_on_load (stbi__unpremultiply_on_load_set \ - ? stbi__unpremultiply_on_load_local \ - : stbi__unpremultiply_on_load_global) -#define stbi__de_iphone_flag (stbi__de_iphone_flag_set \ - ? stbi__de_iphone_flag_local \ - : stbi__de_iphone_flag_global) -#endif // STBI_THREAD_LOCAL - -static void stbi__de_iphone(stbi__png *z) -{ - stbi__context *s = z->s; - stbi__uint32 i, pixel_count = s->img_x * s->img_y; - stbi_uc *p = z->out; - - if (s->img_out_n == 3) { // convert bgr to rgb - for (i=0; i < pixel_count; ++i) { - stbi_uc t = p[0]; - p[0] = p[2]; - p[2] = t; - p += 3; - } - } else { - STBI_ASSERT(s->img_out_n == 4); - if (stbi__unpremultiply_on_load) { - // convert bgr to rgb and unpremultiply - for (i=0; i < pixel_count; ++i) { - stbi_uc a = p[3]; - stbi_uc t = p[0]; - if (a) { - stbi_uc half = a / 2; - p[0] = (p[2] * 255 + half) / a; - p[1] = (p[1] * 255 + half) / a; - p[2] = ( t * 255 + half) / a; - } else { - p[0] = p[2]; - p[2] = t; - } - p += 4; - } - } else { - // convert bgr to rgb - for (i=0; i < pixel_count; ++i) { - stbi_uc t = p[0]; - p[0] = p[2]; - p[2] = t; - p += 4; - } - } - } -} - -#define STBI__PNG_TYPE(a,b,c,d) (((unsigned) (a) << 24) + ((unsigned) (b) << 16) + ((unsigned) (c) << 8) + (unsigned) (d)) - -static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp) -{ - stbi_uc palette[1024], pal_img_n=0; - stbi_uc has_trans=0, tc[3]={0}; - stbi__uint16 tc16[3]; - stbi__uint32 ioff=0, idata_limit=0, i, pal_len=0; - int first=1,k,interlace=0, color=0, is_iphone=0; - stbi__context *s = z->s; - - z->expanded = NULL; - z->idata = NULL; - z->out = NULL; - - if (!stbi__check_png_header(s)) return 0; - - if (scan == STBI__SCAN_type) return 1; - - for (;;) { - stbi__pngchunk c = stbi__get_chunk_header(s); - switch (c.type) { - case STBI__PNG_TYPE('C','g','B','I'): - is_iphone = 1; - stbi__skip(s, c.length); - break; - case STBI__PNG_TYPE('I','H','D','R'): { - int comp,filter; - if (!first) return stbi__err("multiple IHDR","Corrupt PNG"); - first = 0; - if (c.length != 13) return stbi__err("bad IHDR len","Corrupt PNG"); - s->img_x = stbi__get32be(s); - s->img_y = stbi__get32be(s); - if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); - if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); - z->depth = stbi__get8(s); if (z->depth != 1 && z->depth != 2 && z->depth != 4 && z->depth != 8 && z->depth != 16) return stbi__err("1/2/4/8/16-bit only","PNG not supported: 1/2/4/8/16-bit only"); - color = stbi__get8(s); if (color > 6) return stbi__err("bad ctype","Corrupt PNG"); - if (color == 3 && z->depth == 16) return stbi__err("bad ctype","Corrupt PNG"); - if (color == 3) pal_img_n = 3; else if (color & 1) return stbi__err("bad ctype","Corrupt PNG"); - comp = stbi__get8(s); if (comp) return stbi__err("bad comp method","Corrupt PNG"); - filter= stbi__get8(s); if (filter) return stbi__err("bad filter method","Corrupt PNG"); - interlace = stbi__get8(s); if (interlace>1) return stbi__err("bad interlace method","Corrupt PNG"); - if (!s->img_x || !s->img_y) return stbi__err("0-pixel image","Corrupt PNG"); - if (!pal_img_n) { - s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0); - if ((1 << 30) / s->img_x / s->img_n < s->img_y) return stbi__err("too large", "Image too large to decode"); - if (scan == STBI__SCAN_header) return 1; - } else { - // if paletted, then pal_n is our final components, and - // img_n is # components to decompress/filter. - s->img_n = 1; - if ((1 << 30) / s->img_x / 4 < s->img_y) return stbi__err("too large","Corrupt PNG"); - // if SCAN_header, have to scan to see if we have a tRNS - } - break; - } - - case STBI__PNG_TYPE('P','L','T','E'): { - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if (c.length > 256*3) return stbi__err("invalid PLTE","Corrupt PNG"); - pal_len = c.length / 3; - if (pal_len * 3 != c.length) return stbi__err("invalid PLTE","Corrupt PNG"); - for (i=0; i < pal_len; ++i) { - palette[i*4+0] = stbi__get8(s); - palette[i*4+1] = stbi__get8(s); - palette[i*4+2] = stbi__get8(s); - palette[i*4+3] = 255; - } - break; - } - - case STBI__PNG_TYPE('t','R','N','S'): { - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if (z->idata) return stbi__err("tRNS after IDAT","Corrupt PNG"); - if (pal_img_n) { - if (scan == STBI__SCAN_header) { s->img_n = 4; return 1; } - if (pal_len == 0) return stbi__err("tRNS before PLTE","Corrupt PNG"); - if (c.length > pal_len) return stbi__err("bad tRNS len","Corrupt PNG"); - pal_img_n = 4; - for (i=0; i < c.length; ++i) - palette[i*4+3] = stbi__get8(s); - } else { - if (!(s->img_n & 1)) return stbi__err("tRNS with alpha","Corrupt PNG"); - if (c.length != (stbi__uint32) s->img_n*2) return stbi__err("bad tRNS len","Corrupt PNG"); - has_trans = 1; - if (z->depth == 16) { - for (k = 0; k < s->img_n; ++k) tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is - } else { - for (k = 0; k < s->img_n; ++k) tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger - } - } - break; - } - - case STBI__PNG_TYPE('I','D','A','T'): { - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if (pal_img_n && !pal_len) return stbi__err("no PLTE","Corrupt PNG"); - if (scan == STBI__SCAN_header) { s->img_n = pal_img_n; return 1; } - if ((int)(ioff + c.length) < (int)ioff) return 0; - if (ioff + c.length > idata_limit) { - stbi__uint32 idata_limit_old = idata_limit; - stbi_uc *p; - if (idata_limit == 0) idata_limit = c.length > 4096 ? c.length : 4096; - while (ioff + c.length > idata_limit) - idata_limit *= 2; - STBI_NOTUSED(idata_limit_old); - p = (stbi_uc *) STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit); if (p == NULL) return stbi__err("outofmem", "Out of memory"); - z->idata = p; - } - if (!stbi__getn(s, z->idata+ioff,c.length)) return stbi__err("outofdata","Corrupt PNG"); - ioff += c.length; - break; - } - - case STBI__PNG_TYPE('I','E','N','D'): { - stbi__uint32 raw_len, bpl; - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if (scan != STBI__SCAN_load) return 1; - if (z->idata == NULL) return stbi__err("no IDAT","Corrupt PNG"); - // initial guess for decoded data size to avoid unnecessary reallocs - bpl = (s->img_x * z->depth + 7) / 8; // bytes per line, per component - raw_len = bpl * s->img_y * s->img_n /* pixels */ + s->img_y /* filter mode per row */; - z->expanded = (stbi_uc *) stbi_zlib_decode_malloc_guesssize_headerflag((char *) z->idata, ioff, raw_len, (int *) &raw_len, !is_iphone); - if (z->expanded == NULL) return 0; // zlib should set error - STBI_FREE(z->idata); z->idata = NULL; - if ((req_comp == s->img_n+1 && req_comp != 3 && !pal_img_n) || has_trans) - s->img_out_n = s->img_n+1; - else - s->img_out_n = s->img_n; - if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, z->depth, color, interlace)) return 0; - if (has_trans) { - if (z->depth == 16) { - if (!stbi__compute_transparency16(z, tc16, s->img_out_n)) return 0; - } else { - if (!stbi__compute_transparency(z, tc, s->img_out_n)) return 0; - } - } - if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2) - stbi__de_iphone(z); - if (pal_img_n) { - // pal_img_n == 3 or 4 - s->img_n = pal_img_n; // record the actual colors we had - s->img_out_n = pal_img_n; - if (req_comp >= 3) s->img_out_n = req_comp; - if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n)) - return 0; - } else if (has_trans) { - // non-paletted image with tRNS -> source image has (constant) alpha - ++s->img_n; - } - STBI_FREE(z->expanded); z->expanded = NULL; - // end of PNG chunk, read and skip CRC - stbi__get32be(s); - return 1; - } - - default: - // if critical, fail - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if ((c.type & (1 << 29)) == 0) { - #ifndef STBI_NO_FAILURE_STRINGS - // not threadsafe - static char invalid_chunk[] = "XXXX PNG chunk not known"; - invalid_chunk[0] = STBI__BYTECAST(c.type >> 24); - invalid_chunk[1] = STBI__BYTECAST(c.type >> 16); - invalid_chunk[2] = STBI__BYTECAST(c.type >> 8); - invalid_chunk[3] = STBI__BYTECAST(c.type >> 0); - #endif - return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type"); - } - stbi__skip(s, c.length); - break; - } - // end of PNG chunk, read and skip CRC - stbi__get32be(s); - } -} - -static void *stbi__do_png(stbi__png *p, int *x, int *y, int *n, int req_comp, stbi__result_info *ri) -{ - void *result=NULL; - if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error"); - if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) { - if (p->depth <= 8) - ri->bits_per_channel = 8; - else if (p->depth == 16) - ri->bits_per_channel = 16; - else - return stbi__errpuc("bad bits_per_channel", "PNG not supported: unsupported color depth"); - result = p->out; - p->out = NULL; - if (req_comp && req_comp != p->s->img_out_n) { - if (ri->bits_per_channel == 8) - result = stbi__convert_format((unsigned char *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); - else - result = stbi__convert_format16((stbi__uint16 *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); - p->s->img_out_n = req_comp; - if (result == NULL) return result; - } - *x = p->s->img_x; - *y = p->s->img_y; - if (n) *n = p->s->img_n; - } - STBI_FREE(p->out); p->out = NULL; - STBI_FREE(p->expanded); p->expanded = NULL; - STBI_FREE(p->idata); p->idata = NULL; - - return result; -} - -static void *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) -{ - stbi__png p; - p.s = s; - return stbi__do_png(&p, x,y,comp,req_comp, ri); -} - -static int stbi__png_test(stbi__context *s) -{ - int r; - r = stbi__check_png_header(s); - stbi__rewind(s); - return r; -} - -static int stbi__png_info_raw(stbi__png *p, int *x, int *y, int *comp) -{ - if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) { - stbi__rewind( p->s ); - return 0; - } - if (x) *x = p->s->img_x; - if (y) *y = p->s->img_y; - if (comp) *comp = p->s->img_n; - return 1; -} - -static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp) -{ - stbi__png p; - p.s = s; - return stbi__png_info_raw(&p, x, y, comp); -} - -static int stbi__png_is16(stbi__context *s) -{ - stbi__png p; - p.s = s; - if (!stbi__png_info_raw(&p, NULL, NULL, NULL)) - return 0; - if (p.depth != 16) { - stbi__rewind(p.s); - return 0; - } - return 1; -} -#endif - -// Microsoft/Windows BMP image - -#ifndef STBI_NO_BMP -static int stbi__bmp_test_raw(stbi__context *s) -{ - int r; - int sz; - if (stbi__get8(s) != 'B') return 0; - if (stbi__get8(s) != 'M') return 0; - stbi__get32le(s); // discard filesize - stbi__get16le(s); // discard reserved - stbi__get16le(s); // discard reserved - stbi__get32le(s); // discard data offset - sz = stbi__get32le(s); - r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124); - return r; -} - -static int stbi__bmp_test(stbi__context *s) -{ - int r = stbi__bmp_test_raw(s); - stbi__rewind(s); - return r; -} - - -// returns 0..31 for the highest set bit -static int stbi__high_bit(unsigned int z) -{ - int n=0; - if (z == 0) return -1; - if (z >= 0x10000) { n += 16; z >>= 16; } - if (z >= 0x00100) { n += 8; z >>= 8; } - if (z >= 0x00010) { n += 4; z >>= 4; } - if (z >= 0x00004) { n += 2; z >>= 2; } - if (z >= 0x00002) { n += 1;/* >>= 1;*/ } - return n; -} - -static int stbi__bitcount(unsigned int a) -{ - a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2 - a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4 - a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits - a = (a + (a >> 8)); // max 16 per 8 bits - a = (a + (a >> 16)); // max 32 per 8 bits - return a & 0xff; -} - -// extract an arbitrarily-aligned N-bit value (N=bits) -// from v, and then make it 8-bits long and fractionally -// extend it to full full range. -static int stbi__shiftsigned(unsigned int v, int shift, int bits) -{ - static unsigned int mul_table[9] = { - 0, - 0xff/*0b11111111*/, 0x55/*0b01010101*/, 0x49/*0b01001001*/, 0x11/*0b00010001*/, - 0x21/*0b00100001*/, 0x41/*0b01000001*/, 0x81/*0b10000001*/, 0x01/*0b00000001*/, - }; - static unsigned int shift_table[9] = { - 0, 0,0,1,0,2,4,6,0, - }; - if (shift < 0) - v <<= -shift; - else - v >>= shift; - STBI_ASSERT(v < 256); - v >>= (8-bits); - STBI_ASSERT(bits >= 0 && bits <= 8); - return (int) ((unsigned) v * mul_table[bits]) >> shift_table[bits]; -} - -typedef struct -{ - int bpp, offset, hsz; - unsigned int mr,mg,mb,ma, all_a; - int extra_read; -} stbi__bmp_data; - -static int stbi__bmp_set_mask_defaults(stbi__bmp_data *info, int compress) -{ - // BI_BITFIELDS specifies masks explicitly, don't override - if (compress == 3) - return 1; - - if (compress == 0) { - if (info->bpp == 16) { - info->mr = 31u << 10; - info->mg = 31u << 5; - info->mb = 31u << 0; - } else if (info->bpp == 32) { - info->mr = 0xffu << 16; - info->mg = 0xffu << 8; - info->mb = 0xffu << 0; - info->ma = 0xffu << 24; - info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0 - } else { - // otherwise, use defaults, which is all-0 - info->mr = info->mg = info->mb = info->ma = 0; - } - return 1; - } - return 0; // error -} - -static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info) -{ - int hsz; - if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP"); - stbi__get32le(s); // discard filesize - stbi__get16le(s); // discard reserved - stbi__get16le(s); // discard reserved - info->offset = stbi__get32le(s); - info->hsz = hsz = stbi__get32le(s); - info->mr = info->mg = info->mb = info->ma = 0; - info->extra_read = 14; - - if (info->offset < 0) return stbi__errpuc("bad BMP", "bad BMP"); - - if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) return stbi__errpuc("unknown BMP", "BMP type not supported: unknown"); - if (hsz == 12) { - s->img_x = stbi__get16le(s); - s->img_y = stbi__get16le(s); - } else { - s->img_x = stbi__get32le(s); - s->img_y = stbi__get32le(s); - } - if (stbi__get16le(s) != 1) return stbi__errpuc("bad BMP", "bad BMP"); - info->bpp = stbi__get16le(s); - if (hsz != 12) { - int compress = stbi__get32le(s); - if (compress == 1 || compress == 2) return stbi__errpuc("BMP RLE", "BMP type not supported: RLE"); - if (compress >= 4) return stbi__errpuc("BMP JPEG/PNG", "BMP type not supported: unsupported compression"); // this includes PNG/JPEG modes - if (compress == 3 && info->bpp != 16 && info->bpp != 32) return stbi__errpuc("bad BMP", "bad BMP"); // bitfields requires 16 or 32 bits/pixel - stbi__get32le(s); // discard sizeof - stbi__get32le(s); // discard hres - stbi__get32le(s); // discard vres - stbi__get32le(s); // discard colorsused - stbi__get32le(s); // discard max important - if (hsz == 40 || hsz == 56) { - if (hsz == 56) { - stbi__get32le(s); - stbi__get32le(s); - stbi__get32le(s); - stbi__get32le(s); - } - if (info->bpp == 16 || info->bpp == 32) { - if (compress == 0) { - stbi__bmp_set_mask_defaults(info, compress); - } else if (compress == 3) { - info->mr = stbi__get32le(s); - info->mg = stbi__get32le(s); - info->mb = stbi__get32le(s); - info->extra_read += 12; - // not documented, but generated by photoshop and handled by mspaint - if (info->mr == info->mg && info->mg == info->mb) { - // ?!?!? - return stbi__errpuc("bad BMP", "bad BMP"); - } - } else - return stbi__errpuc("bad BMP", "bad BMP"); - } - } else { - // V4/V5 header - int i; - if (hsz != 108 && hsz != 124) - return stbi__errpuc("bad BMP", "bad BMP"); - info->mr = stbi__get32le(s); - info->mg = stbi__get32le(s); - info->mb = stbi__get32le(s); - info->ma = stbi__get32le(s); - if (compress != 3) // override mr/mg/mb unless in BI_BITFIELDS mode, as per docs - stbi__bmp_set_mask_defaults(info, compress); - stbi__get32le(s); // discard color space - for (i=0; i < 12; ++i) - stbi__get32le(s); // discard color space parameters - if (hsz == 124) { - stbi__get32le(s); // discard rendering intent - stbi__get32le(s); // discard offset of profile data - stbi__get32le(s); // discard size of profile data - stbi__get32le(s); // discard reserved - } - } - } - return (void *) 1; -} - - -static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) -{ - stbi_uc *out; - unsigned int mr=0,mg=0,mb=0,ma=0, all_a; - stbi_uc pal[256][4]; - int psize=0,i,j,width; - int flip_vertically, pad, target; - stbi__bmp_data info; - STBI_NOTUSED(ri); - - info.all_a = 255; - if (stbi__bmp_parse_header(s, &info) == NULL) - return NULL; // error code already set - - flip_vertically = ((int) s->img_y) > 0; - s->img_y = abs((int) s->img_y); - - if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - - mr = info.mr; - mg = info.mg; - mb = info.mb; - ma = info.ma; - all_a = info.all_a; - - if (info.hsz == 12) { - if (info.bpp < 24) - psize = (info.offset - info.extra_read - 24) / 3; - } else { - if (info.bpp < 16) - psize = (info.offset - info.extra_read - info.hsz) >> 2; - } - if (psize == 0) { - if (info.offset != s->callback_already_read + (s->img_buffer - s->img_buffer_original)) { - return stbi__errpuc("bad offset", "Corrupt BMP"); - } - } - - if (info.bpp == 24 && ma == 0xff000000) - s->img_n = 3; - else - s->img_n = ma ? 4 : 3; - if (req_comp && req_comp >= 3) // we can directly decode 3 or 4 - target = req_comp; - else - target = s->img_n; // if they want monochrome, we'll post-convert - - // sanity-check size - if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0)) - return stbi__errpuc("too large", "Corrupt BMP"); - - out = (stbi_uc *) stbi__malloc_mad3(target, s->img_x, s->img_y, 0); - if (!out) return stbi__errpuc("outofmem", "Out of memory"); - if (info.bpp < 16) { - int z=0; - if (psize == 0 || psize > 256) { STBI_FREE(out); return stbi__errpuc("invalid", "Corrupt BMP"); } - for (i=0; i < psize; ++i) { - pal[i][2] = stbi__get8(s); - pal[i][1] = stbi__get8(s); - pal[i][0] = stbi__get8(s); - if (info.hsz != 12) stbi__get8(s); - pal[i][3] = 255; - } - stbi__skip(s, info.offset - info.extra_read - info.hsz - psize * (info.hsz == 12 ? 3 : 4)); - if (info.bpp == 1) width = (s->img_x + 7) >> 3; - else if (info.bpp == 4) width = (s->img_x + 1) >> 1; - else if (info.bpp == 8) width = s->img_x; - else { STBI_FREE(out); return stbi__errpuc("bad bpp", "Corrupt BMP"); } - pad = (-width)&3; - if (info.bpp == 1) { - for (j=0; j < (int) s->img_y; ++j) { - int bit_offset = 7, v = stbi__get8(s); - for (i=0; i < (int) s->img_x; ++i) { - int color = (v>>bit_offset)&0x1; - out[z++] = pal[color][0]; - out[z++] = pal[color][1]; - out[z++] = pal[color][2]; - if (target == 4) out[z++] = 255; - if (i+1 == (int) s->img_x) break; - if((--bit_offset) < 0) { - bit_offset = 7; - v = stbi__get8(s); - } - } - stbi__skip(s, pad); - } - } else { - for (j=0; j < (int) s->img_y; ++j) { - for (i=0; i < (int) s->img_x; i += 2) { - int v=stbi__get8(s),v2=0; - if (info.bpp == 4) { - v2 = v & 15; - v >>= 4; - } - out[z++] = pal[v][0]; - out[z++] = pal[v][1]; - out[z++] = pal[v][2]; - if (target == 4) out[z++] = 255; - if (i+1 == (int) s->img_x) break; - v = (info.bpp == 8) ? stbi__get8(s) : v2; - out[z++] = pal[v][0]; - out[z++] = pal[v][1]; - out[z++] = pal[v][2]; - if (target == 4) out[z++] = 255; - } - stbi__skip(s, pad); - } - } - } else { - int rshift=0,gshift=0,bshift=0,ashift=0,rcount=0,gcount=0,bcount=0,acount=0; - int z = 0; - int easy=0; - stbi__skip(s, info.offset - info.extra_read - info.hsz); - if (info.bpp == 24) width = 3 * s->img_x; - else if (info.bpp == 16) width = 2*s->img_x; - else /* bpp = 32 and pad = 0 */ width=0; - pad = (-width) & 3; - if (info.bpp == 24) { - easy = 1; - } else if (info.bpp == 32) { - if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000) - easy = 2; - } - if (!easy) { - if (!mr || !mg || !mb) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); } - // right shift amt to put high bit in position #7 - rshift = stbi__high_bit(mr)-7; rcount = stbi__bitcount(mr); - gshift = stbi__high_bit(mg)-7; gcount = stbi__bitcount(mg); - bshift = stbi__high_bit(mb)-7; bcount = stbi__bitcount(mb); - ashift = stbi__high_bit(ma)-7; acount = stbi__bitcount(ma); - if (rcount > 8 || gcount > 8 || bcount > 8 || acount > 8) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); } - } - for (j=0; j < (int) s->img_y; ++j) { - if (easy) { - for (i=0; i < (int) s->img_x; ++i) { - unsigned char a; - out[z+2] = stbi__get8(s); - out[z+1] = stbi__get8(s); - out[z+0] = stbi__get8(s); - z += 3; - a = (easy == 2 ? stbi__get8(s) : 255); - all_a |= a; - if (target == 4) out[z++] = a; - } - } else { - int bpp = info.bpp; - for (i=0; i < (int) s->img_x; ++i) { - stbi__uint32 v = (bpp == 16 ? (stbi__uint32) stbi__get16le(s) : stbi__get32le(s)); - unsigned int a; - out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount)); - out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount)); - out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount)); - a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255); - all_a |= a; - if (target == 4) out[z++] = STBI__BYTECAST(a); - } - } - stbi__skip(s, pad); - } - } - - // if alpha channel is all 0s, replace with all 255s - if (target == 4 && all_a == 0) - for (i=4*s->img_x*s->img_y-1; i >= 0; i -= 4) - out[i] = 255; - - if (flip_vertically) { - stbi_uc t; - for (j=0; j < (int) s->img_y>>1; ++j) { - stbi_uc *p1 = out + j *s->img_x*target; - stbi_uc *p2 = out + (s->img_y-1-j)*s->img_x*target; - for (i=0; i < (int) s->img_x*target; ++i) { - t = p1[i]; p1[i] = p2[i]; p2[i] = t; - } - } - } - - if (req_comp && req_comp != target) { - out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y); - if (out == NULL) return out; // stbi__convert_format frees input on failure - } - - *x = s->img_x; - *y = s->img_y; - if (comp) *comp = s->img_n; - return out; -} -#endif - -// Targa Truevision - TGA -// by Jonathan Dummer -#ifndef STBI_NO_TGA -// returns STBI_rgb or whatever, 0 on error -static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int* is_rgb16) -{ - // only RGB or RGBA (incl. 16bit) or grey allowed - if (is_rgb16) *is_rgb16 = 0; - switch(bits_per_pixel) { - case 8: return STBI_grey; - case 16: if(is_grey) return STBI_grey_alpha; - // fallthrough - case 15: if(is_rgb16) *is_rgb16 = 1; - return STBI_rgb; - case 24: // fallthrough - case 32: return bits_per_pixel/8; - default: return 0; - } -} - -static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp) -{ - int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp; - int sz, tga_colormap_type; - stbi__get8(s); // discard Offset - tga_colormap_type = stbi__get8(s); // colormap type - if( tga_colormap_type > 1 ) { - stbi__rewind(s); - return 0; // only RGB or indexed allowed - } - tga_image_type = stbi__get8(s); // image type - if ( tga_colormap_type == 1 ) { // colormapped (paletted) image - if (tga_image_type != 1 && tga_image_type != 9) { - stbi__rewind(s); - return 0; - } - stbi__skip(s,4); // skip index of first colormap entry and number of entries - sz = stbi__get8(s); // check bits per palette color entry - if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) { - stbi__rewind(s); - return 0; - } - stbi__skip(s,4); // skip image x and y origin - tga_colormap_bpp = sz; - } else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE - if ( (tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11) ) { - stbi__rewind(s); - return 0; // only RGB or grey allowed, +/- RLE - } - stbi__skip(s,9); // skip colormap specification and image x/y origin - tga_colormap_bpp = 0; - } - tga_w = stbi__get16le(s); - if( tga_w < 1 ) { - stbi__rewind(s); - return 0; // test width - } - tga_h = stbi__get16le(s); - if( tga_h < 1 ) { - stbi__rewind(s); - return 0; // test height - } - tga_bits_per_pixel = stbi__get8(s); // bits per pixel - stbi__get8(s); // ignore alpha bits - if (tga_colormap_bpp != 0) { - if((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) { - // when using a colormap, tga_bits_per_pixel is the size of the indexes - // I don't think anything but 8 or 16bit indexes makes sense - stbi__rewind(s); - return 0; - } - tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL); - } else { - tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11), NULL); - } - if(!tga_comp) { - stbi__rewind(s); - return 0; - } - if (x) *x = tga_w; - if (y) *y = tga_h; - if (comp) *comp = tga_comp; - return 1; // seems to have passed everything -} - -static int stbi__tga_test(stbi__context *s) -{ - int res = 0; - int sz, tga_color_type; - stbi__get8(s); // discard Offset - tga_color_type = stbi__get8(s); // color type - if ( tga_color_type > 1 ) goto errorEnd; // only RGB or indexed allowed - sz = stbi__get8(s); // image type - if ( tga_color_type == 1 ) { // colormapped (paletted) image - if (sz != 1 && sz != 9) goto errorEnd; // colortype 1 demands image type 1 or 9 - stbi__skip(s,4); // skip index of first colormap entry and number of entries - sz = stbi__get8(s); // check bits per palette color entry - if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd; - stbi__skip(s,4); // skip image x and y origin - } else { // "normal" image w/o colormap - if ( (sz != 2) && (sz != 3) && (sz != 10) && (sz != 11) ) goto errorEnd; // only RGB or grey allowed, +/- RLE - stbi__skip(s,9); // skip colormap specification and image x/y origin - } - if ( stbi__get16le(s) < 1 ) goto errorEnd; // test width - if ( stbi__get16le(s) < 1 ) goto errorEnd; // test height - sz = stbi__get8(s); // bits per pixel - if ( (tga_color_type == 1) && (sz != 8) && (sz != 16) ) goto errorEnd; // for colormapped images, bpp is size of an index - if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd; - - res = 1; // if we got this far, everything's good and we can return 1 instead of 0 - -errorEnd: - stbi__rewind(s); - return res; -} - -// read 16bit value and convert to 24bit RGB -static void stbi__tga_read_rgb16(stbi__context *s, stbi_uc* out) -{ - stbi__uint16 px = (stbi__uint16)stbi__get16le(s); - stbi__uint16 fiveBitMask = 31; - // we have 3 channels with 5bits each - int r = (px >> 10) & fiveBitMask; - int g = (px >> 5) & fiveBitMask; - int b = px & fiveBitMask; - // Note that this saves the data in RGB(A) order, so it doesn't need to be swapped later - out[0] = (stbi_uc)((r * 255)/31); - out[1] = (stbi_uc)((g * 255)/31); - out[2] = (stbi_uc)((b * 255)/31); - - // some people claim that the most significant bit might be used for alpha - // (possibly if an alpha-bit is set in the "image descriptor byte") - // but that only made 16bit test images completely translucent.. - // so let's treat all 15 and 16bit TGAs as RGB with no alpha. -} - -static void *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) -{ - // read in the TGA header stuff - int tga_offset = stbi__get8(s); - int tga_indexed = stbi__get8(s); - int tga_image_type = stbi__get8(s); - int tga_is_RLE = 0; - int tga_palette_start = stbi__get16le(s); - int tga_palette_len = stbi__get16le(s); - int tga_palette_bits = stbi__get8(s); - int tga_x_origin = stbi__get16le(s); - int tga_y_origin = stbi__get16le(s); - int tga_width = stbi__get16le(s); - int tga_height = stbi__get16le(s); - int tga_bits_per_pixel = stbi__get8(s); - int tga_comp, tga_rgb16=0; - int tga_inverted = stbi__get8(s); - // int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused (useless?) - // image data - unsigned char *tga_data; - unsigned char *tga_palette = NULL; - int i, j; - unsigned char raw_data[4] = {0}; - int RLE_count = 0; - int RLE_repeating = 0; - int read_next_pixel = 1; - STBI_NOTUSED(ri); - STBI_NOTUSED(tga_x_origin); // @TODO - STBI_NOTUSED(tga_y_origin); // @TODO - - if (tga_height > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - if (tga_width > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - - // do a tiny bit of precessing - if ( tga_image_type >= 8 ) - { - tga_image_type -= 8; - tga_is_RLE = 1; - } - tga_inverted = 1 - ((tga_inverted >> 5) & 1); - - // If I'm paletted, then I'll use the number of bits from the palette - if ( tga_indexed ) tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16); - else tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16); - - if(!tga_comp) // shouldn't really happen, stbi__tga_test() should have ensured basic consistency - return stbi__errpuc("bad format", "Can't find out TGA pixelformat"); - - // tga info - *x = tga_width; - *y = tga_height; - if (comp) *comp = tga_comp; - - if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0)) - return stbi__errpuc("too large", "Corrupt TGA"); - - tga_data = (unsigned char*)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0); - if (!tga_data) return stbi__errpuc("outofmem", "Out of memory"); - - // skip to the data's starting position (offset usually = 0) - stbi__skip(s, tga_offset ); - - if ( !tga_indexed && !tga_is_RLE && !tga_rgb16 ) { - for (i=0; i < tga_height; ++i) { - int row = tga_inverted ? tga_height -i - 1 : i; - stbi_uc *tga_row = tga_data + row*tga_width*tga_comp; - stbi__getn(s, tga_row, tga_width * tga_comp); - } - } else { - // do I need to load a palette? - if ( tga_indexed) - { - if (tga_palette_len == 0) { /* you have to have at least one entry! */ - STBI_FREE(tga_data); - return stbi__errpuc("bad palette", "Corrupt TGA"); - } - - // any data to skip? (offset usually = 0) - stbi__skip(s, tga_palette_start ); - // load the palette - tga_palette = (unsigned char*)stbi__malloc_mad2(tga_palette_len, tga_comp, 0); - if (!tga_palette) { - STBI_FREE(tga_data); - return stbi__errpuc("outofmem", "Out of memory"); - } - if (tga_rgb16) { - stbi_uc *pal_entry = tga_palette; - STBI_ASSERT(tga_comp == STBI_rgb); - for (i=0; i < tga_palette_len; ++i) { - stbi__tga_read_rgb16(s, pal_entry); - pal_entry += tga_comp; - } - } else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) { - STBI_FREE(tga_data); - STBI_FREE(tga_palette); - return stbi__errpuc("bad palette", "Corrupt TGA"); - } - } - // load the data - for (i=0; i < tga_width * tga_height; ++i) - { - // if I'm in RLE mode, do I need to get a RLE stbi__pngchunk? - if ( tga_is_RLE ) - { - if ( RLE_count == 0 ) - { - // yep, get the next byte as a RLE command - int RLE_cmd = stbi__get8(s); - RLE_count = 1 + (RLE_cmd & 127); - RLE_repeating = RLE_cmd >> 7; - read_next_pixel = 1; - } else if ( !RLE_repeating ) - { - read_next_pixel = 1; - } - } else - { - read_next_pixel = 1; - } - // OK, if I need to read a pixel, do it now - if ( read_next_pixel ) - { - // load however much data we did have - if ( tga_indexed ) - { - // read in index, then perform the lookup - int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(s); - if ( pal_idx >= tga_palette_len ) { - // invalid index - pal_idx = 0; - } - pal_idx *= tga_comp; - for (j = 0; j < tga_comp; ++j) { - raw_data[j] = tga_palette[pal_idx+j]; - } - } else if(tga_rgb16) { - STBI_ASSERT(tga_comp == STBI_rgb); - stbi__tga_read_rgb16(s, raw_data); - } else { - // read in the data raw - for (j = 0; j < tga_comp; ++j) { - raw_data[j] = stbi__get8(s); - } - } - // clear the reading flag for the next pixel - read_next_pixel = 0; - } // end of reading a pixel - - // copy data - for (j = 0; j < tga_comp; ++j) - tga_data[i*tga_comp+j] = raw_data[j]; - - // in case we're in RLE mode, keep counting down - --RLE_count; - } - // do I need to invert the image? - if ( tga_inverted ) - { - for (j = 0; j*2 < tga_height; ++j) - { - int index1 = j * tga_width * tga_comp; - int index2 = (tga_height - 1 - j) * tga_width * tga_comp; - for (i = tga_width * tga_comp; i > 0; --i) - { - unsigned char temp = tga_data[index1]; - tga_data[index1] = tga_data[index2]; - tga_data[index2] = temp; - ++index1; - ++index2; - } - } - } - // clear my palette, if I had one - if ( tga_palette != NULL ) - { - STBI_FREE( tga_palette ); - } - } - - // swap RGB - if the source data was RGB16, it already is in the right order - if (tga_comp >= 3 && !tga_rgb16) - { - unsigned char* tga_pixel = tga_data; - for (i=0; i < tga_width * tga_height; ++i) - { - unsigned char temp = tga_pixel[0]; - tga_pixel[0] = tga_pixel[2]; - tga_pixel[2] = temp; - tga_pixel += tga_comp; - } - } - - // convert to target component count - if (req_comp && req_comp != tga_comp) - tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height); - - // the things I do to get rid of an error message, and yet keep - // Microsoft's C compilers happy... [8^( - tga_palette_start = tga_palette_len = tga_palette_bits = - tga_x_origin = tga_y_origin = 0; - STBI_NOTUSED(tga_palette_start); - // OK, done - return tga_data; -} -#endif - -// ************************************************************************************************* -// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz, tweaked by STB - -#ifndef STBI_NO_PSD -static int stbi__psd_test(stbi__context *s) -{ - int r = (stbi__get32be(s) == 0x38425053); - stbi__rewind(s); - return r; -} - -static int stbi__psd_decode_rle(stbi__context *s, stbi_uc *p, int pixelCount) -{ - int count, nleft, len; - - count = 0; - while ((nleft = pixelCount - count) > 0) { - len = stbi__get8(s); - if (len == 128) { - // No-op. - } else if (len < 128) { - // Copy next len+1 bytes literally. - len++; - if (len > nleft) return 0; // corrupt data - count += len; - while (len) { - *p = stbi__get8(s); - p += 4; - len--; - } - } else if (len > 128) { - stbi_uc val; - // Next -len+1 bytes in the dest are replicated from next source byte. - // (Interpret len as a negative 8-bit int.) - len = 257 - len; - if (len > nleft) return 0; // corrupt data - val = stbi__get8(s); - count += len; - while (len) { - *p = val; - p += 4; - len--; - } - } - } - - return 1; -} - -static void *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc) -{ - int pixelCount; - int channelCount, compression; - int channel, i; - int bitdepth; - int w,h; - stbi_uc *out; - STBI_NOTUSED(ri); - - // Check identifier - if (stbi__get32be(s) != 0x38425053) // "8BPS" - return stbi__errpuc("not PSD", "Corrupt PSD image"); - - // Check file type version. - if (stbi__get16be(s) != 1) - return stbi__errpuc("wrong version", "Unsupported version of PSD image"); - - // Skip 6 reserved bytes. - stbi__skip(s, 6 ); - - // Read the number of channels (R, G, B, A, etc). - channelCount = stbi__get16be(s); - if (channelCount < 0 || channelCount > 16) - return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image"); - - // Read the rows and columns of the image. - h = stbi__get32be(s); - w = stbi__get32be(s); - - if (h > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - if (w > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - - // Make sure the depth is 8 bits. - bitdepth = stbi__get16be(s); - if (bitdepth != 8 && bitdepth != 16) - return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit"); - - // Make sure the color mode is RGB. - // Valid options are: - // 0: Bitmap - // 1: Grayscale - // 2: Indexed color - // 3: RGB color - // 4: CMYK color - // 7: Multichannel - // 8: Duotone - // 9: Lab color - if (stbi__get16be(s) != 3) - return stbi__errpuc("wrong color format", "PSD is not in RGB color format"); - - // Skip the Mode Data. (It's the palette for indexed color; other info for other modes.) - stbi__skip(s,stbi__get32be(s) ); - - // Skip the image resources. (resolution, pen tool paths, etc) - stbi__skip(s, stbi__get32be(s) ); - - // Skip the reserved data. - stbi__skip(s, stbi__get32be(s) ); - - // Find out if the data is compressed. - // Known values: - // 0: no compression - // 1: RLE compressed - compression = stbi__get16be(s); - if (compression > 1) - return stbi__errpuc("bad compression", "PSD has an unknown compression format"); - - // Check size - if (!stbi__mad3sizes_valid(4, w, h, 0)) - return stbi__errpuc("too large", "Corrupt PSD"); - - // Create the destination image. - - if (!compression && bitdepth == 16 && bpc == 16) { - out = (stbi_uc *) stbi__malloc_mad3(8, w, h, 0); - ri->bits_per_channel = 16; - } else - out = (stbi_uc *) stbi__malloc(4 * w*h); - - if (!out) return stbi__errpuc("outofmem", "Out of memory"); - pixelCount = w*h; - - // Initialize the data to zero. - //memset( out, 0, pixelCount * 4 ); - - // Finally, the image data. - if (compression) { - // RLE as used by .PSD and .TIFF - // Loop until you get the number of unpacked bytes you are expecting: - // Read the next source byte into n. - // If n is between 0 and 127 inclusive, copy the next n+1 bytes literally. - // Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times. - // Else if n is 128, noop. - // Endloop - - // The RLE-compressed data is preceded by a 2-byte data count for each row in the data, - // which we're going to just skip. - stbi__skip(s, h * channelCount * 2 ); - - // Read the RLE data by channel. - for (channel = 0; channel < 4; channel++) { - stbi_uc *p; - - p = out+channel; - if (channel >= channelCount) { - // Fill this channel with default data. - for (i = 0; i < pixelCount; i++, p += 4) - *p = (channel == 3 ? 255 : 0); - } else { - // Read the RLE data. - if (!stbi__psd_decode_rle(s, p, pixelCount)) { - STBI_FREE(out); - return stbi__errpuc("corrupt", "bad RLE data"); - } - } - } - - } else { - // We're at the raw image data. It's each channel in order (Red, Green, Blue, Alpha, ...) - // where each channel consists of an 8-bit (or 16-bit) value for each pixel in the image. - - // Read the data by channel. - for (channel = 0; channel < 4; channel++) { - if (channel >= channelCount) { - // Fill this channel with default data. - if (bitdepth == 16 && bpc == 16) { - stbi__uint16 *q = ((stbi__uint16 *) out) + channel; - stbi__uint16 val = channel == 3 ? 65535 : 0; - for (i = 0; i < pixelCount; i++, q += 4) - *q = val; - } else { - stbi_uc *p = out+channel; - stbi_uc val = channel == 3 ? 255 : 0; - for (i = 0; i < pixelCount; i++, p += 4) - *p = val; - } - } else { - if (ri->bits_per_channel == 16) { // output bpc - stbi__uint16 *q = ((stbi__uint16 *) out) + channel; - for (i = 0; i < pixelCount; i++, q += 4) - *q = (stbi__uint16) stbi__get16be(s); - } else { - stbi_uc *p = out+channel; - if (bitdepth == 16) { // input bpc - for (i = 0; i < pixelCount; i++, p += 4) - *p = (stbi_uc) (stbi__get16be(s) >> 8); - } else { - for (i = 0; i < pixelCount; i++, p += 4) - *p = stbi__get8(s); - } - } - } - } - } - - // remove weird white matte from PSD - if (channelCount >= 4) { - if (ri->bits_per_channel == 16) { - for (i=0; i < w*h; ++i) { - stbi__uint16 *pixel = (stbi__uint16 *) out + 4*i; - if (pixel[3] != 0 && pixel[3] != 65535) { - float a = pixel[3] / 65535.0f; - float ra = 1.0f / a; - float inv_a = 65535.0f * (1 - ra); - pixel[0] = (stbi__uint16) (pixel[0]*ra + inv_a); - pixel[1] = (stbi__uint16) (pixel[1]*ra + inv_a); - pixel[2] = (stbi__uint16) (pixel[2]*ra + inv_a); - } - } - } else { - for (i=0; i < w*h; ++i) { - unsigned char *pixel = out + 4*i; - if (pixel[3] != 0 && pixel[3] != 255) { - float a = pixel[3] / 255.0f; - float ra = 1.0f / a; - float inv_a = 255.0f * (1 - ra); - pixel[0] = (unsigned char) (pixel[0]*ra + inv_a); - pixel[1] = (unsigned char) (pixel[1]*ra + inv_a); - pixel[2] = (unsigned char) (pixel[2]*ra + inv_a); - } - } - } - } - - // convert to desired output format - if (req_comp && req_comp != 4) { - if (ri->bits_per_channel == 16) - out = (stbi_uc *) stbi__convert_format16((stbi__uint16 *) out, 4, req_comp, w, h); - else - out = stbi__convert_format(out, 4, req_comp, w, h); - if (out == NULL) return out; // stbi__convert_format frees input on failure - } - - if (comp) *comp = 4; - *y = h; - *x = w; - - return out; -} -#endif - -// ************************************************************************************************* -// Softimage PIC loader -// by Tom Seddon -// -// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format -// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/ - -#ifndef STBI_NO_PIC -static int stbi__pic_is4(stbi__context *s,const char *str) -{ - int i; - for (i=0; i<4; ++i) - if (stbi__get8(s) != (stbi_uc)str[i]) - return 0; - - return 1; -} - -static int stbi__pic_test_core(stbi__context *s) -{ - int i; - - if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) - return 0; - - for(i=0;i<84;++i) - stbi__get8(s); - - if (!stbi__pic_is4(s,"PICT")) - return 0; - - return 1; -} - -typedef struct -{ - stbi_uc size,type,channel; -} stbi__pic_packet; - -static stbi_uc *stbi__readval(stbi__context *s, int channel, stbi_uc *dest) -{ - int mask=0x80, i; - - for (i=0; i<4; ++i, mask>>=1) { - if (channel & mask) { - if (stbi__at_eof(s)) return stbi__errpuc("bad file","PIC file too short"); - dest[i]=stbi__get8(s); - } - } - - return dest; -} - -static void stbi__copyval(int channel,stbi_uc *dest,const stbi_uc *src) -{ - int mask=0x80,i; - - for (i=0;i<4; ++i, mask>>=1) - if (channel&mask) - dest[i]=src[i]; -} - -static stbi_uc *stbi__pic_load_core(stbi__context *s,int width,int height,int *comp, stbi_uc *result) -{ - int act_comp=0,num_packets=0,y,chained; - stbi__pic_packet packets[10]; - - // this will (should...) cater for even some bizarre stuff like having data - // for the same channel in multiple packets. - do { - stbi__pic_packet *packet; - - if (num_packets==sizeof(packets)/sizeof(packets[0])) - return stbi__errpuc("bad format","too many packets"); - - packet = &packets[num_packets++]; - - chained = stbi__get8(s); - packet->size = stbi__get8(s); - packet->type = stbi__get8(s); - packet->channel = stbi__get8(s); - - act_comp |= packet->channel; - - if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (reading packets)"); - if (packet->size != 8) return stbi__errpuc("bad format","packet isn't 8bpp"); - } while (chained); - - *comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel? - - for(y=0; ytype) { - default: - return stbi__errpuc("bad format","packet has bad compression type"); - - case 0: {//uncompressed - int x; - - for(x=0;xchannel,dest)) - return 0; - break; - } - - case 1://Pure RLE - { - int left=width, i; - - while (left>0) { - stbi_uc count,value[4]; - - count=stbi__get8(s); - if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (pure read count)"); - - if (count > left) - count = (stbi_uc) left; - - if (!stbi__readval(s,packet->channel,value)) return 0; - - for(i=0; ichannel,dest,value); - left -= count; - } - } - break; - - case 2: {//Mixed RLE - int left=width; - while (left>0) { - int count = stbi__get8(s), i; - if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (mixed read count)"); - - if (count >= 128) { // Repeated - stbi_uc value[4]; - - if (count==128) - count = stbi__get16be(s); - else - count -= 127; - if (count > left) - return stbi__errpuc("bad file","scanline overrun"); - - if (!stbi__readval(s,packet->channel,value)) - return 0; - - for(i=0;ichannel,dest,value); - } else { // Raw - ++count; - if (count>left) return stbi__errpuc("bad file","scanline overrun"); - - for(i=0;ichannel,dest)) - return 0; - } - left-=count; - } - break; - } - } - } - } - - return result; -} - -static void *stbi__pic_load(stbi__context *s,int *px,int *py,int *comp,int req_comp, stbi__result_info *ri) -{ - stbi_uc *result; - int i, x,y, internal_comp; - STBI_NOTUSED(ri); - - if (!comp) comp = &internal_comp; - - for (i=0; i<92; ++i) - stbi__get8(s); - - x = stbi__get16be(s); - y = stbi__get16be(s); - - if (y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - if (x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - - if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (pic header)"); - if (!stbi__mad3sizes_valid(x, y, 4, 0)) return stbi__errpuc("too large", "PIC image too large to decode"); - - stbi__get32be(s); //skip `ratio' - stbi__get16be(s); //skip `fields' - stbi__get16be(s); //skip `pad' - - // intermediate buffer is RGBA - result = (stbi_uc *) stbi__malloc_mad3(x, y, 4, 0); - if (!result) return stbi__errpuc("outofmem", "Out of memory"); - memset(result, 0xff, x*y*4); - - if (!stbi__pic_load_core(s,x,y,comp, result)) { - STBI_FREE(result); - result=0; - } - *px = x; - *py = y; - if (req_comp == 0) req_comp = *comp; - result=stbi__convert_format(result,4,req_comp,x,y); - - return result; -} - -static int stbi__pic_test(stbi__context *s) -{ - int r = stbi__pic_test_core(s); - stbi__rewind(s); - return r; -} -#endif - -// ************************************************************************************************* -// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb - -#ifndef STBI_NO_GIF -typedef struct -{ - stbi__int16 prefix; - stbi_uc first; - stbi_uc suffix; -} stbi__gif_lzw; - -typedef struct -{ - int w,h; - stbi_uc *out; // output buffer (always 4 components) - stbi_uc *background; // The current "background" as far as a gif is concerned - stbi_uc *history; - int flags, bgindex, ratio, transparent, eflags; - stbi_uc pal[256][4]; - stbi_uc lpal[256][4]; - stbi__gif_lzw codes[8192]; - stbi_uc *color_table; - int parse, step; - int lflags; - int start_x, start_y; - int max_x, max_y; - int cur_x, cur_y; - int line_size; - int delay; -} stbi__gif; - -static int stbi__gif_test_raw(stbi__context *s) -{ - int sz; - if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') return 0; - sz = stbi__get8(s); - if (sz != '9' && sz != '7') return 0; - if (stbi__get8(s) != 'a') return 0; - return 1; -} - -static int stbi__gif_test(stbi__context *s) -{ - int r = stbi__gif_test_raw(s); - stbi__rewind(s); - return r; -} - -static void stbi__gif_parse_colortable(stbi__context *s, stbi_uc pal[256][4], int num_entries, int transp) -{ - int i; - for (i=0; i < num_entries; ++i) { - pal[i][2] = stbi__get8(s); - pal[i][1] = stbi__get8(s); - pal[i][0] = stbi__get8(s); - pal[i][3] = transp == i ? 0 : 255; - } -} - -static int stbi__gif_header(stbi__context *s, stbi__gif *g, int *comp, int is_info) -{ - stbi_uc version; - if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') - return stbi__err("not GIF", "Corrupt GIF"); - - version = stbi__get8(s); - if (version != '7' && version != '9') return stbi__err("not GIF", "Corrupt GIF"); - if (stbi__get8(s) != 'a') return stbi__err("not GIF", "Corrupt GIF"); - - stbi__g_failure_reason = ""; - g->w = stbi__get16le(s); - g->h = stbi__get16le(s); - g->flags = stbi__get8(s); - g->bgindex = stbi__get8(s); - g->ratio = stbi__get8(s); - g->transparent = -1; - - if (g->w > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); - if (g->h > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); - - if (comp != 0) *comp = 4; // can't actually tell whether it's 3 or 4 until we parse the comments - - if (is_info) return 1; - - if (g->flags & 0x80) - stbi__gif_parse_colortable(s,g->pal, 2 << (g->flags & 7), -1); - - return 1; -} - -static int stbi__gif_info_raw(stbi__context *s, int *x, int *y, int *comp) -{ - stbi__gif* g = (stbi__gif*) stbi__malloc(sizeof(stbi__gif)); - if (!g) return stbi__err("outofmem", "Out of memory"); - if (!stbi__gif_header(s, g, comp, 1)) { - STBI_FREE(g); - stbi__rewind( s ); - return 0; - } - if (x) *x = g->w; - if (y) *y = g->h; - STBI_FREE(g); - return 1; -} - -static void stbi__out_gif_code(stbi__gif *g, stbi__uint16 code) -{ - stbi_uc *p, *c; - int idx; - - // recurse to decode the prefixes, since the linked-list is backwards, - // and working backwards through an interleaved image would be nasty - if (g->codes[code].prefix >= 0) - stbi__out_gif_code(g, g->codes[code].prefix); - - if (g->cur_y >= g->max_y) return; - - idx = g->cur_x + g->cur_y; - p = &g->out[idx]; - g->history[idx / 4] = 1; - - c = &g->color_table[g->codes[code].suffix * 4]; - if (c[3] > 128) { // don't render transparent pixels; - p[0] = c[2]; - p[1] = c[1]; - p[2] = c[0]; - p[3] = c[3]; - } - g->cur_x += 4; - - if (g->cur_x >= g->max_x) { - g->cur_x = g->start_x; - g->cur_y += g->step; - - while (g->cur_y >= g->max_y && g->parse > 0) { - g->step = (1 << g->parse) * g->line_size; - g->cur_y = g->start_y + (g->step >> 1); - --g->parse; - } - } -} - -static stbi_uc *stbi__process_gif_raster(stbi__context *s, stbi__gif *g) -{ - stbi_uc lzw_cs; - stbi__int32 len, init_code; - stbi__uint32 first; - stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear; - stbi__gif_lzw *p; - - lzw_cs = stbi__get8(s); - if (lzw_cs > 12) return NULL; - clear = 1 << lzw_cs; - first = 1; - codesize = lzw_cs + 1; - codemask = (1 << codesize) - 1; - bits = 0; - valid_bits = 0; - for (init_code = 0; init_code < clear; init_code++) { - g->codes[init_code].prefix = -1; - g->codes[init_code].first = (stbi_uc) init_code; - g->codes[init_code].suffix = (stbi_uc) init_code; - } - - // support no starting clear code - avail = clear+2; - oldcode = -1; - - len = 0; - for(;;) { - if (valid_bits < codesize) { - if (len == 0) { - len = stbi__get8(s); // start new block - if (len == 0) - return g->out; - } - --len; - bits |= (stbi__int32) stbi__get8(s) << valid_bits; - valid_bits += 8; - } else { - stbi__int32 code = bits & codemask; - bits >>= codesize; - valid_bits -= codesize; - // @OPTIMIZE: is there some way we can accelerate the non-clear path? - if (code == clear) { // clear code - codesize = lzw_cs + 1; - codemask = (1 << codesize) - 1; - avail = clear + 2; - oldcode = -1; - first = 0; - } else if (code == clear + 1) { // end of stream code - stbi__skip(s, len); - while ((len = stbi__get8(s)) > 0) - stbi__skip(s,len); - return g->out; - } else if (code <= avail) { - if (first) { - return stbi__errpuc("no clear code", "Corrupt GIF"); - } - - if (oldcode >= 0) { - p = &g->codes[avail++]; - if (avail > 8192) { - return stbi__errpuc("too many codes", "Corrupt GIF"); - } - - p->prefix = (stbi__int16) oldcode; - p->first = g->codes[oldcode].first; - p->suffix = (code == avail) ? p->first : g->codes[code].first; - } else if (code == avail) - return stbi__errpuc("illegal code in raster", "Corrupt GIF"); - - stbi__out_gif_code(g, (stbi__uint16) code); - - if ((avail & codemask) == 0 && avail <= 0x0FFF) { - codesize++; - codemask = (1 << codesize) - 1; - } - - oldcode = code; - } else { - return stbi__errpuc("illegal code in raster", "Corrupt GIF"); - } - } - } -} - -// this function is designed to support animated gifs, although stb_image doesn't support it -// two back is the image from two frames ago, used for a very specific disposal format -static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, int req_comp, stbi_uc *two_back) -{ - int dispose; - int first_frame; - int pi; - int pcount; - STBI_NOTUSED(req_comp); - - // on first frame, any non-written pixels get the background colour (non-transparent) - first_frame = 0; - if (g->out == 0) { - if (!stbi__gif_header(s, g, comp,0)) return 0; // stbi__g_failure_reason set by stbi__gif_header - if (!stbi__mad3sizes_valid(4, g->w, g->h, 0)) - return stbi__errpuc("too large", "GIF image is too large"); - pcount = g->w * g->h; - g->out = (stbi_uc *) stbi__malloc(4 * pcount); - g->background = (stbi_uc *) stbi__malloc(4 * pcount); - g->history = (stbi_uc *) stbi__malloc(pcount); - if (!g->out || !g->background || !g->history) - return stbi__errpuc("outofmem", "Out of memory"); - - // image is treated as "transparent" at the start - ie, nothing overwrites the current background; - // background colour is only used for pixels that are not rendered first frame, after that "background" - // color refers to the color that was there the previous frame. - memset(g->out, 0x00, 4 * pcount); - memset(g->background, 0x00, 4 * pcount); // state of the background (starts transparent) - memset(g->history, 0x00, pcount); // pixels that were affected previous frame - first_frame = 1; - } else { - // second frame - how do we dispose of the previous one? - dispose = (g->eflags & 0x1C) >> 2; - pcount = g->w * g->h; - - if ((dispose == 3) && (two_back == 0)) { - dispose = 2; // if I don't have an image to revert back to, default to the old background - } - - if (dispose == 3) { // use previous graphic - for (pi = 0; pi < pcount; ++pi) { - if (g->history[pi]) { - memcpy( &g->out[pi * 4], &two_back[pi * 4], 4 ); - } - } - } else if (dispose == 2) { - // restore what was changed last frame to background before that frame; - for (pi = 0; pi < pcount; ++pi) { - if (g->history[pi]) { - memcpy( &g->out[pi * 4], &g->background[pi * 4], 4 ); - } - } - } else { - // This is a non-disposal case eithe way, so just - // leave the pixels as is, and they will become the new background - // 1: do not dispose - // 0: not specified. - } - - // background is what out is after the undoing of the previou frame; - memcpy( g->background, g->out, 4 * g->w * g->h ); - } - - // clear my history; - memset( g->history, 0x00, g->w * g->h ); // pixels that were affected previous frame - - for (;;) { - int tag = stbi__get8(s); - switch (tag) { - case 0x2C: /* Image Descriptor */ - { - stbi__int32 x, y, w, h; - stbi_uc *o; - - x = stbi__get16le(s); - y = stbi__get16le(s); - w = stbi__get16le(s); - h = stbi__get16le(s); - if (((x + w) > (g->w)) || ((y + h) > (g->h))) - return stbi__errpuc("bad Image Descriptor", "Corrupt GIF"); - - g->line_size = g->w * 4; - g->start_x = x * 4; - g->start_y = y * g->line_size; - g->max_x = g->start_x + w * 4; - g->max_y = g->start_y + h * g->line_size; - g->cur_x = g->start_x; - g->cur_y = g->start_y; - - // if the width of the specified rectangle is 0, that means - // we may not see *any* pixels or the image is malformed; - // to make sure this is caught, move the current y down to - // max_y (which is what out_gif_code checks). - if (w == 0) - g->cur_y = g->max_y; - - g->lflags = stbi__get8(s); - - if (g->lflags & 0x40) { - g->step = 8 * g->line_size; // first interlaced spacing - g->parse = 3; - } else { - g->step = g->line_size; - g->parse = 0; - } - - if (g->lflags & 0x80) { - stbi__gif_parse_colortable(s,g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1); - g->color_table = (stbi_uc *) g->lpal; - } else if (g->flags & 0x80) { - g->color_table = (stbi_uc *) g->pal; - } else - return stbi__errpuc("missing color table", "Corrupt GIF"); - - o = stbi__process_gif_raster(s, g); - if (!o) return NULL; - - // if this was the first frame, - pcount = g->w * g->h; - if (first_frame && (g->bgindex > 0)) { - // if first frame, any pixel not drawn to gets the background color - for (pi = 0; pi < pcount; ++pi) { - if (g->history[pi] == 0) { - g->pal[g->bgindex][3] = 255; // just in case it was made transparent, undo that; It will be reset next frame if need be; - memcpy( &g->out[pi * 4], &g->pal[g->bgindex], 4 ); - } - } - } - - return o; - } - - case 0x21: // Comment Extension. - { - int len; - int ext = stbi__get8(s); - if (ext == 0xF9) { // Graphic Control Extension. - len = stbi__get8(s); - if (len == 4) { - g->eflags = stbi__get8(s); - g->delay = 10 * stbi__get16le(s); // delay - 1/100th of a second, saving as 1/1000ths. - - // unset old transparent - if (g->transparent >= 0) { - g->pal[g->transparent][3] = 255; - } - if (g->eflags & 0x01) { - g->transparent = stbi__get8(s); - if (g->transparent >= 0) { - g->pal[g->transparent][3] = 0; - } - } else { - // don't need transparent - stbi__skip(s, 1); - g->transparent = -1; - } - } else { - stbi__skip(s, len); - break; - } - } - while ((len = stbi__get8(s)) != 0) { - stbi__skip(s, len); - } - break; - } - - case 0x3B: // gif stream termination code - return (stbi_uc *) s; // using '1' causes warning on some compilers - - default: - return stbi__errpuc("unknown code", "Corrupt GIF"); - } - } -} - -static void *stbi__load_gif_main_outofmem(stbi__gif *g, stbi_uc *out, int **delays) -{ - STBI_FREE(g->out); - STBI_FREE(g->history); - STBI_FREE(g->background); - - if (out) STBI_FREE(out); - if (delays && *delays) STBI_FREE(*delays); - return stbi__errpuc("outofmem", "Out of memory"); -} - -static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp) -{ - if (stbi__gif_test(s)) { - int layers = 0; - stbi_uc *u = 0; - stbi_uc *out = 0; - stbi_uc *two_back = 0; - stbi__gif g; - int stride; - int out_size = 0; - int delays_size = 0; - - STBI_NOTUSED(out_size); - STBI_NOTUSED(delays_size); - - memset(&g, 0, sizeof(g)); - if (delays) { - *delays = 0; - } - - do { - u = stbi__gif_load_next(s, &g, comp, req_comp, two_back); - if (u == (stbi_uc *) s) u = 0; // end of animated gif marker - - if (u) { - *x = g.w; - *y = g.h; - ++layers; - stride = g.w * g.h * 4; - - if (out) { - void *tmp = (stbi_uc*) STBI_REALLOC_SIZED( out, out_size, layers * stride ); - if (!tmp) - return stbi__load_gif_main_outofmem(&g, out, delays); - else { - out = (stbi_uc*) tmp; - out_size = layers * stride; - } - - if (delays) { - int *new_delays = (int*) STBI_REALLOC_SIZED( *delays, delays_size, sizeof(int) * layers ); - if (!new_delays) - return stbi__load_gif_main_outofmem(&g, out, delays); - *delays = new_delays; - delays_size = layers * sizeof(int); - } - } else { - out = (stbi_uc*)stbi__malloc( layers * stride ); - if (!out) - return stbi__load_gif_main_outofmem(&g, out, delays); - out_size = layers * stride; - if (delays) { - *delays = (int*) stbi__malloc( layers * sizeof(int) ); - if (!*delays) - return stbi__load_gif_main_outofmem(&g, out, delays); - delays_size = layers * sizeof(int); - } - } - memcpy( out + ((layers - 1) * stride), u, stride ); - if (layers >= 2) { - two_back = out - 2 * stride; - } - - if (delays) { - (*delays)[layers - 1U] = g.delay; - } - } - } while (u != 0); - - // free temp buffer; - STBI_FREE(g.out); - STBI_FREE(g.history); - STBI_FREE(g.background); - - // do the final conversion after loading everything; - if (req_comp && req_comp != 4) - out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h); - - *z = layers; - return out; - } else { - return stbi__errpuc("not GIF", "Image was not as a gif type."); - } -} - -static void *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) -{ - stbi_uc *u = 0; - stbi__gif g; - memset(&g, 0, sizeof(g)); - STBI_NOTUSED(ri); - - u = stbi__gif_load_next(s, &g, comp, req_comp, 0); - if (u == (stbi_uc *) s) u = 0; // end of animated gif marker - if (u) { - *x = g.w; - *y = g.h; - - // moved conversion to after successful load so that the same - // can be done for multiple frames. - if (req_comp && req_comp != 4) - u = stbi__convert_format(u, 4, req_comp, g.w, g.h); - } else if (g.out) { - // if there was an error and we allocated an image buffer, free it! - STBI_FREE(g.out); - } - - // free buffers needed for multiple frame loading; - STBI_FREE(g.history); - STBI_FREE(g.background); - - return u; -} - -static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp) -{ - return stbi__gif_info_raw(s,x,y,comp); -} -#endif - -// ************************************************************************************************* -// Radiance RGBE HDR loader -// originally by Nicolas Schulz -#ifndef STBI_NO_HDR -static int stbi__hdr_test_core(stbi__context *s, const char *signature) -{ - int i; - for (i=0; signature[i]; ++i) - if (stbi__get8(s) != signature[i]) - return 0; - stbi__rewind(s); - return 1; -} - -static int stbi__hdr_test(stbi__context* s) -{ - int r = stbi__hdr_test_core(s, "#?RADIANCE\n"); - stbi__rewind(s); - if(!r) { - r = stbi__hdr_test_core(s, "#?RGBE\n"); - stbi__rewind(s); - } - return r; -} - -#define STBI__HDR_BUFLEN 1024 -static char *stbi__hdr_gettoken(stbi__context *z, char *buffer) -{ - int len=0; - char c = '\0'; - - c = (char) stbi__get8(z); - - while (!stbi__at_eof(z) && c != '\n') { - buffer[len++] = c; - if (len == STBI__HDR_BUFLEN-1) { - // flush to end of line - while (!stbi__at_eof(z) && stbi__get8(z) != '\n') - ; - break; - } - c = (char) stbi__get8(z); - } - - buffer[len] = 0; - return buffer; -} - -static void stbi__hdr_convert(float *output, stbi_uc *input, int req_comp) -{ - if ( input[3] != 0 ) { - float f1; - // Exponent - f1 = (float) ldexp(1.0f, input[3] - (int)(128 + 8)); - if (req_comp <= 2) - output[0] = (input[0] + input[1] + input[2]) * f1 / 3; - else { - output[0] = input[0] * f1; - output[1] = input[1] * f1; - output[2] = input[2] * f1; - } - if (req_comp == 2) output[1] = 1; - if (req_comp == 4) output[3] = 1; - } else { - switch (req_comp) { - case 4: output[3] = 1; /* fallthrough */ - case 3: output[0] = output[1] = output[2] = 0; - break; - case 2: output[1] = 1; /* fallthrough */ - case 1: output[0] = 0; - break; - } - } -} - -static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) -{ - char buffer[STBI__HDR_BUFLEN]; - char *token; - int valid = 0; - int width, height; - stbi_uc *scanline; - float *hdr_data; - int len; - unsigned char count, value; - int i, j, k, c1,c2, z; - const char *headerToken; - STBI_NOTUSED(ri); - - // Check identifier - headerToken = stbi__hdr_gettoken(s,buffer); - if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0) - return stbi__errpf("not HDR", "Corrupt HDR image"); - - // Parse header - for(;;) { - token = stbi__hdr_gettoken(s,buffer); - if (token[0] == 0) break; - if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; - } - - if (!valid) return stbi__errpf("unsupported format", "Unsupported HDR format"); - - // Parse width and height - // can't use sscanf() if we're not using stdio! - token = stbi__hdr_gettoken(s,buffer); - if (strncmp(token, "-Y ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format"); - token += 3; - height = (int) strtol(token, &token, 10); - while (*token == ' ') ++token; - if (strncmp(token, "+X ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format"); - token += 3; - width = (int) strtol(token, NULL, 10); - - if (height > STBI_MAX_DIMENSIONS) return stbi__errpf("too large","Very large image (corrupt?)"); - if (width > STBI_MAX_DIMENSIONS) return stbi__errpf("too large","Very large image (corrupt?)"); - - *x = width; - *y = height; - - if (comp) *comp = 3; - if (req_comp == 0) req_comp = 3; - - if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0)) - return stbi__errpf("too large", "HDR image is too large"); - - // Read data - hdr_data = (float *) stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0); - if (!hdr_data) - return stbi__errpf("outofmem", "Out of memory"); - - // Load image data - // image data is stored as some number of sca - if ( width < 8 || width >= 32768) { - // Read flat data - for (j=0; j < height; ++j) { - for (i=0; i < width; ++i) { - stbi_uc rgbe[4]; - main_decode_loop: - stbi__getn(s, rgbe, 4); - stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp); - } - } - } else { - // Read RLE-encoded data - scanline = NULL; - - for (j = 0; j < height; ++j) { - c1 = stbi__get8(s); - c2 = stbi__get8(s); - len = stbi__get8(s); - if (c1 != 2 || c2 != 2 || (len & 0x80)) { - // not run-length encoded, so we have to actually use THIS data as a decoded - // pixel (note this can't be a valid pixel--one of RGB must be >= 128) - stbi_uc rgbe[4]; - rgbe[0] = (stbi_uc) c1; - rgbe[1] = (stbi_uc) c2; - rgbe[2] = (stbi_uc) len; - rgbe[3] = (stbi_uc) stbi__get8(s); - stbi__hdr_convert(hdr_data, rgbe, req_comp); - i = 1; - j = 0; - STBI_FREE(scanline); - goto main_decode_loop; // yes, this makes no sense - } - len <<= 8; - len |= stbi__get8(s); - if (len != width) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("invalid decoded scanline length", "corrupt HDR"); } - if (scanline == NULL) { - scanline = (stbi_uc *) stbi__malloc_mad2(width, 4, 0); - if (!scanline) { - STBI_FREE(hdr_data); - return stbi__errpf("outofmem", "Out of memory"); - } - } - - for (k = 0; k < 4; ++k) { - int nleft; - i = 0; - while ((nleft = width - i) > 0) { - count = stbi__get8(s); - if (count > 128) { - // Run - value = stbi__get8(s); - count -= 128; - if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); } - for (z = 0; z < count; ++z) - scanline[i++ * 4 + k] = value; - } else { - // Dump - if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); } - for (z = 0; z < count; ++z) - scanline[i++ * 4 + k] = stbi__get8(s); - } - } - } - for (i=0; i < width; ++i) - stbi__hdr_convert(hdr_data+(j*width + i)*req_comp, scanline + i*4, req_comp); - } - if (scanline) - STBI_FREE(scanline); - } - - return hdr_data; -} - -static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp) -{ - char buffer[STBI__HDR_BUFLEN]; - char *token; - int valid = 0; - int dummy; - - if (!x) x = &dummy; - if (!y) y = &dummy; - if (!comp) comp = &dummy; - - if (stbi__hdr_test(s) == 0) { - stbi__rewind( s ); - return 0; - } - - for(;;) { - token = stbi__hdr_gettoken(s,buffer); - if (token[0] == 0) break; - if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; - } - - if (!valid) { - stbi__rewind( s ); - return 0; - } - token = stbi__hdr_gettoken(s,buffer); - if (strncmp(token, "-Y ", 3)) { - stbi__rewind( s ); - return 0; - } - token += 3; - *y = (int) strtol(token, &token, 10); - while (*token == ' ') ++token; - if (strncmp(token, "+X ", 3)) { - stbi__rewind( s ); - return 0; - } - token += 3; - *x = (int) strtol(token, NULL, 10); - *comp = 3; - return 1; -} -#endif // STBI_NO_HDR - -#ifndef STBI_NO_BMP -static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp) -{ - void *p; - stbi__bmp_data info; - - info.all_a = 255; - p = stbi__bmp_parse_header(s, &info); - if (p == NULL) { - stbi__rewind( s ); - return 0; - } - if (x) *x = s->img_x; - if (y) *y = s->img_y; - if (comp) { - if (info.bpp == 24 && info.ma == 0xff000000) - *comp = 3; - else - *comp = info.ma ? 4 : 3; - } - return 1; -} -#endif - -#ifndef STBI_NO_PSD -static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp) -{ - int channelCount, dummy, depth; - if (!x) x = &dummy; - if (!y) y = &dummy; - if (!comp) comp = &dummy; - if (stbi__get32be(s) != 0x38425053) { - stbi__rewind( s ); - return 0; - } - if (stbi__get16be(s) != 1) { - stbi__rewind( s ); - return 0; - } - stbi__skip(s, 6); - channelCount = stbi__get16be(s); - if (channelCount < 0 || channelCount > 16) { - stbi__rewind( s ); - return 0; - } - *y = stbi__get32be(s); - *x = stbi__get32be(s); - depth = stbi__get16be(s); - if (depth != 8 && depth != 16) { - stbi__rewind( s ); - return 0; - } - if (stbi__get16be(s) != 3) { - stbi__rewind( s ); - return 0; - } - *comp = 4; - return 1; -} - -static int stbi__psd_is16(stbi__context *s) -{ - int channelCount, depth; - if (stbi__get32be(s) != 0x38425053) { - stbi__rewind( s ); - return 0; - } - if (stbi__get16be(s) != 1) { - stbi__rewind( s ); - return 0; - } - stbi__skip(s, 6); - channelCount = stbi__get16be(s); - if (channelCount < 0 || channelCount > 16) { - stbi__rewind( s ); - return 0; - } - STBI_NOTUSED(stbi__get32be(s)); - STBI_NOTUSED(stbi__get32be(s)); - depth = stbi__get16be(s); - if (depth != 16) { - stbi__rewind( s ); - return 0; - } - return 1; -} -#endif - -#ifndef STBI_NO_PIC -static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp) -{ - int act_comp=0,num_packets=0,chained,dummy; - stbi__pic_packet packets[10]; - - if (!x) x = &dummy; - if (!y) y = &dummy; - if (!comp) comp = &dummy; - - if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) { - stbi__rewind(s); - return 0; - } - - stbi__skip(s, 88); - - *x = stbi__get16be(s); - *y = stbi__get16be(s); - if (stbi__at_eof(s)) { - stbi__rewind( s); - return 0; - } - if ( (*x) != 0 && (1 << 28) / (*x) < (*y)) { - stbi__rewind( s ); - return 0; - } - - stbi__skip(s, 8); - - do { - stbi__pic_packet *packet; - - if (num_packets==sizeof(packets)/sizeof(packets[0])) - return 0; - - packet = &packets[num_packets++]; - chained = stbi__get8(s); - packet->size = stbi__get8(s); - packet->type = stbi__get8(s); - packet->channel = stbi__get8(s); - act_comp |= packet->channel; - - if (stbi__at_eof(s)) { - stbi__rewind( s ); - return 0; - } - if (packet->size != 8) { - stbi__rewind( s ); - return 0; - } - } while (chained); - - *comp = (act_comp & 0x10 ? 4 : 3); - - return 1; -} -#endif - -// ************************************************************************************************* -// Portable Gray Map and Portable Pixel Map loader -// by Ken Miller -// -// PGM: http://netpbm.sourceforge.net/doc/pgm.html -// PPM: http://netpbm.sourceforge.net/doc/ppm.html -// -// Known limitations: -// Does not support comments in the header section -// Does not support ASCII image data (formats P2 and P3) - -#ifndef STBI_NO_PNM - -static int stbi__pnm_test(stbi__context *s) -{ - char p, t; - p = (char) stbi__get8(s); - t = (char) stbi__get8(s); - if (p != 'P' || (t != '5' && t != '6')) { - stbi__rewind( s ); - return 0; - } - return 1; -} - -static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) -{ - stbi_uc *out; - STBI_NOTUSED(ri); - - ri->bits_per_channel = stbi__pnm_info(s, (int *)&s->img_x, (int *)&s->img_y, (int *)&s->img_n); - if (ri->bits_per_channel == 0) - return 0; - - if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - - *x = s->img_x; - *y = s->img_y; - if (comp) *comp = s->img_n; - - if (!stbi__mad4sizes_valid(s->img_n, s->img_x, s->img_y, ri->bits_per_channel / 8, 0)) - return stbi__errpuc("too large", "PNM too large"); - - out = (stbi_uc *) stbi__malloc_mad4(s->img_n, s->img_x, s->img_y, ri->bits_per_channel / 8, 0); - if (!out) return stbi__errpuc("outofmem", "Out of memory"); - stbi__getn(s, out, s->img_n * s->img_x * s->img_y * (ri->bits_per_channel / 8)); - - if (req_comp && req_comp != s->img_n) { - out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y); - if (out == NULL) return out; // stbi__convert_format frees input on failure - } - return out; -} - -static int stbi__pnm_isspace(char c) -{ - return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r'; -} - -static void stbi__pnm_skip_whitespace(stbi__context *s, char *c) -{ - for (;;) { - while (!stbi__at_eof(s) && stbi__pnm_isspace(*c)) - *c = (char) stbi__get8(s); - - if (stbi__at_eof(s) || *c != '#') - break; - - while (!stbi__at_eof(s) && *c != '\n' && *c != '\r' ) - *c = (char) stbi__get8(s); - } -} - -static int stbi__pnm_isdigit(char c) -{ - return c >= '0' && c <= '9'; -} - -static int stbi__pnm_getinteger(stbi__context *s, char *c) -{ - int value = 0; - - while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) { - value = value*10 + (*c - '0'); - *c = (char) stbi__get8(s); - } - - return value; -} - -static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp) -{ - int maxv, dummy; - char c, p, t; - - if (!x) x = &dummy; - if (!y) y = &dummy; - if (!comp) comp = &dummy; - - stbi__rewind(s); - - // Get identifier - p = (char) stbi__get8(s); - t = (char) stbi__get8(s); - if (p != 'P' || (t != '5' && t != '6')) { - stbi__rewind(s); - return 0; - } - - *comp = (t == '6') ? 3 : 1; // '5' is 1-component .pgm; '6' is 3-component .ppm - - c = (char) stbi__get8(s); - stbi__pnm_skip_whitespace(s, &c); - - *x = stbi__pnm_getinteger(s, &c); // read width - stbi__pnm_skip_whitespace(s, &c); - - *y = stbi__pnm_getinteger(s, &c); // read height - stbi__pnm_skip_whitespace(s, &c); - - maxv = stbi__pnm_getinteger(s, &c); // read max value - if (maxv > 65535) - return stbi__err("max value > 65535", "PPM image supports only 8-bit and 16-bit images"); - else if (maxv > 255) - return 16; - else - return 8; -} - -static int stbi__pnm_is16(stbi__context *s) -{ - if (stbi__pnm_info(s, NULL, NULL, NULL) == 16) - return 1; - return 0; -} -#endif - -static int stbi__info_main(stbi__context *s, int *x, int *y, int *comp) -{ - #ifndef STBI_NO_JPEG - if (stbi__jpeg_info(s, x, y, comp)) return 1; - #endif - - #ifndef STBI_NO_PNG - if (stbi__png_info(s, x, y, comp)) return 1; - #endif - - #ifndef STBI_NO_GIF - if (stbi__gif_info(s, x, y, comp)) return 1; - #endif - - #ifndef STBI_NO_BMP - if (stbi__bmp_info(s, x, y, comp)) return 1; - #endif - - #ifndef STBI_NO_PSD - if (stbi__psd_info(s, x, y, comp)) return 1; - #endif - - #ifndef STBI_NO_PIC - if (stbi__pic_info(s, x, y, comp)) return 1; - #endif - - #ifndef STBI_NO_PNM - if (stbi__pnm_info(s, x, y, comp)) return 1; - #endif - - #ifndef STBI_NO_HDR - if (stbi__hdr_info(s, x, y, comp)) return 1; - #endif - - // test tga last because it's a crappy test! - #ifndef STBI_NO_TGA - if (stbi__tga_info(s, x, y, comp)) - return 1; - #endif - return stbi__err("unknown image type", "Image not of any known type, or corrupt"); -} - -static int stbi__is_16_main(stbi__context *s) -{ - #ifndef STBI_NO_PNG - if (stbi__png_is16(s)) return 1; - #endif - - #ifndef STBI_NO_PSD - if (stbi__psd_is16(s)) return 1; - #endif - - #ifndef STBI_NO_PNM - if (stbi__pnm_is16(s)) return 1; - #endif - return 0; -} - -#ifndef STBI_NO_STDIO -STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp) -{ - FILE *f = stbi__fopen(filename, "rb"); - int result; - if (!f) return stbi__err("can't fopen", "Unable to open file"); - result = stbi_info_from_file(f, x, y, comp); - fclose(f); - return result; -} - -STBIDEF int stbi_info_from_file(FILE *f, int *x, int *y, int *comp) -{ - int r; - stbi__context s; - long pos = ftell(f); - stbi__start_file(&s, f); - r = stbi__info_main(&s,x,y,comp); - fseek(f,pos,SEEK_SET); - return r; -} - -STBIDEF int stbi_is_16_bit(char const *filename) -{ - FILE *f = stbi__fopen(filename, "rb"); - int result; - if (!f) return stbi__err("can't fopen", "Unable to open file"); - result = stbi_is_16_bit_from_file(f); - fclose(f); - return result; -} - -STBIDEF int stbi_is_16_bit_from_file(FILE *f) -{ - int r; - stbi__context s; - long pos = ftell(f); - stbi__start_file(&s, f); - r = stbi__is_16_main(&s); - fseek(f,pos,SEEK_SET); - return r; -} -#endif // !STBI_NO_STDIO - -STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp) -{ - stbi__context s; - stbi__start_mem(&s,buffer,len); - return stbi__info_main(&s,x,y,comp); -} - -STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user); - return stbi__info_main(&s,x,y,comp); -} - -STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len) -{ - stbi__context s; - stbi__start_mem(&s,buffer,len); - return stbi__is_16_main(&s); -} - -STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user); - return stbi__is_16_main(&s); -} - -#endif // STB_IMAGE_IMPLEMENTATION - -/* - revision history: - 2.20 (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs - 2.19 (2018-02-11) fix warning - 2.18 (2018-01-30) fix warnings - 2.17 (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug - 1-bit BMP - *_is_16_bit api - avoid warnings - 2.16 (2017-07-23) all functions have 16-bit variants; - STBI_NO_STDIO works again; - compilation fixes; - fix rounding in unpremultiply; - optimize vertical flip; - disable raw_len validation; - documentation fixes - 2.15 (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode; - warning fixes; disable run-time SSE detection on gcc; - uniform handling of optional "return" values; - thread-safe initialization of zlib tables - 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs - 2.13 (2016-11-29) add 16-bit API, only supported for PNG right now - 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes - 2.11 (2016-04-02) allocate large structures on the stack - remove white matting for transparent PSD - fix reported channel count for PNG & BMP - re-enable SSE2 in non-gcc 64-bit - support RGB-formatted JPEG - read 16-bit PNGs (only as 8-bit) - 2.10 (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED - 2.09 (2016-01-16) allow comments in PNM files - 16-bit-per-pixel TGA (not bit-per-component) - info() for TGA could break due to .hdr handling - info() for BMP to shares code instead of sloppy parse - can use STBI_REALLOC_SIZED if allocator doesn't support realloc - code cleanup - 2.08 (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA - 2.07 (2015-09-13) fix compiler warnings - partial animated GIF support - limited 16-bpc PSD support - #ifdef unused functions - bug with < 92 byte PIC,PNM,HDR,TGA - 2.06 (2015-04-19) fix bug where PSD returns wrong '*comp' value - 2.05 (2015-04-19) fix bug in progressive JPEG handling, fix warning - 2.04 (2015-04-15) try to re-enable SIMD on MinGW 64-bit - 2.03 (2015-04-12) extra corruption checking (mmozeiko) - stbi_set_flip_vertically_on_load (nguillemot) - fix NEON support; fix mingw support - 2.02 (2015-01-19) fix incorrect assert, fix warning - 2.01 (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit without -msse2 - 2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG - 2.00 (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg) - progressive JPEG (stb) - PGM/PPM support (Ken Miller) - STBI_MALLOC,STBI_REALLOC,STBI_FREE - GIF bugfix -- seemingly never worked - STBI_NO_*, STBI_ONLY_* - 1.48 (2014-12-14) fix incorrectly-named assert() - 1.47 (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar Cornut & stb) - optimize PNG (ryg) - fix bug in interlaced PNG with user-specified channel count (stb) - 1.46 (2014-08-26) - fix broken tRNS chunk (colorkey-style transparency) in non-paletted PNG - 1.45 (2014-08-16) - fix MSVC-ARM internal compiler error by wrapping malloc - 1.44 (2014-08-07) - various warning fixes from Ronny Chevalier - 1.43 (2014-07-15) - fix MSVC-only compiler problem in code changed in 1.42 - 1.42 (2014-07-09) - don't define _CRT_SECURE_NO_WARNINGS (affects user code) - fixes to stbi__cleanup_jpeg path - added STBI_ASSERT to avoid requiring assert.h - 1.41 (2014-06-25) - fix search&replace from 1.36 that messed up comments/error messages - 1.40 (2014-06-22) - fix gcc struct-initialization warning - 1.39 (2014-06-15) - fix to TGA optimization when req_comp != number of components in TGA; - fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my test suite) - add support for BMP version 5 (more ignored fields) - 1.38 (2014-06-06) - suppress MSVC warnings on integer casts truncating values - fix accidental rename of 'skip' field of I/O - 1.37 (2014-06-04) - remove duplicate typedef - 1.36 (2014-06-03) - convert to header file single-file library - if de-iphone isn't set, load iphone images color-swapped instead of returning NULL - 1.35 (2014-05-27) - various warnings - fix broken STBI_SIMD path - fix bug where stbi_load_from_file no longer left file pointer in correct place - fix broken non-easy path for 32-bit BMP (possibly never used) - TGA optimization by Arseny Kapoulkine - 1.34 (unknown) - use STBI_NOTUSED in stbi__resample_row_generic(), fix one more leak in tga failure case - 1.33 (2011-07-14) - make stbi_is_hdr work in STBI_NO_HDR (as specified), minor compiler-friendly improvements - 1.32 (2011-07-13) - support for "info" function for all supported filetypes (SpartanJ) - 1.31 (2011-06-20) - a few more leak fixes, bug in PNG handling (SpartanJ) - 1.30 (2011-06-11) - added ability to load files via callbacks to accomidate custom input streams (Ben Wenger) - removed deprecated format-specific test/load functions - removed support for installable file formats (stbi_loader) -- would have been broken for IO callbacks anyway - error cases in bmp and tga give messages and don't leak (Raymond Barbiero, grisha) - fix inefficiency in decoding 32-bit BMP (David Woo) - 1.29 (2010-08-16) - various warning fixes from Aurelien Pocheville - 1.28 (2010-08-01) - fix bug in GIF palette transparency (SpartanJ) - 1.27 (2010-08-01) - cast-to-stbi_uc to fix warnings - 1.26 (2010-07-24) - fix bug in file buffering for PNG reported by SpartanJ - 1.25 (2010-07-17) - refix trans_data warning (Won Chun) - 1.24 (2010-07-12) - perf improvements reading from files on platforms with lock-heavy fgetc() - minor perf improvements for jpeg - deprecated type-specific functions so we'll get feedback if they're needed - attempt to fix trans_data warning (Won Chun) - 1.23 fixed bug in iPhone support - 1.22 (2010-07-10) - removed image *writing* support - stbi_info support from Jetro Lauha - GIF support from Jean-Marc Lienher - iPhone PNG-extensions from James Brown - warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err. Janez (U+017D)emva) - 1.21 fix use of 'stbi_uc' in header (reported by jon blow) - 1.20 added support for Softimage PIC, by Tom Seddon - 1.19 bug in interlaced PNG corruption check (found by ryg) - 1.18 (2008-08-02) - fix a threading bug (local mutable static) - 1.17 support interlaced PNG - 1.16 major bugfix - stbi__convert_format converted one too many pixels - 1.15 initialize some fields for thread safety - 1.14 fix threadsafe conversion bug - header-file-only version (#define STBI_HEADER_FILE_ONLY before including) - 1.13 threadsafe - 1.12 const qualifiers in the API - 1.11 Support installable IDCT, colorspace conversion routines - 1.10 Fixes for 64-bit (don't use "unsigned long") - optimized upsampling by Fabian "ryg" Giesen - 1.09 Fix format-conversion for PSD code (bad global variables!) - 1.08 Thatcher Ulrich's PSD code integrated by Nicolas Schulz - 1.07 attempt to fix C++ warning/errors again - 1.06 attempt to fix C++ warning/errors again - 1.05 fix TGA loading to return correct *comp and use good luminance calc - 1.04 default float alpha is 1, not 255; use 'void *' for stbi_image_free - 1.03 bugfixes to STBI_NO_STDIO, STBI_NO_HDR - 1.02 support for (subset of) HDR files, float interface for preferred access to them - 1.01 fix bug: possible bug in handling right-side up bmps... not sure - fix bug: the stbi__bmp_load() and stbi__tga_load() functions didn't work at all - 1.00 interface to zlib that skips zlib header - 0.99 correct handling of alpha in palette - 0.98 TGA loader by lonesock; dynamically add loaders (untested) - 0.97 jpeg errors on too large a file; also catch another malloc failure - 0.96 fix detection of invalid v value - particleman@mollyrocket forum - 0.95 during header scan, seek to markers in case of padding - 0.94 STBI_NO_STDIO to disable stdio usage; rename all #defines the same - 0.93 handle jpegtran output; verbose errors - 0.92 read 4,8,16,24,32-bit BMP files of several formats - 0.91 output 24-bit Windows 3.0 BMP files - 0.90 fix a few more warnings; bump version number to approach 1.0 - 0.61 bugfixes due to Marc LeBlanc, Christopher Lloyd - 0.60 fix compiling as c++ - 0.59 fix warnings: merge Dave Moore's -Wall fixes - 0.58 fix bug: zlib uncompressed mode len/nlen was wrong endian - 0.57 fix bug: jpg last huffman symbol before marker was >9 bits but less than 16 available - 0.56 fix bug: zlib uncompressed mode len vs. nlen - 0.55 fix bug: restart_interval not initialized to 0 - 0.54 allow NULL for 'int *comp' - 0.53 fix bug in png 3->4; speedup png decoding - 0.52 png handles req_comp=3,4 directly; minor cleanup; jpeg comments - 0.51 obey req_comp requests, 1-component jpegs return as 1-component, - on 'test' only check type, not whether we support this variant - 0.50 (2006-11-19) - first released version -*/ - - -/* ------------------------------------------------------------------------------- -This software is available under 2 licenses -- choose whichever you prefer. ------------------------------------------------------------------------------- -ALTERNATIVE A - MIT License -Copyright (c) 2017 Sean Barrett -Permission is hereby granted, free of charge, to any person obtaining a copy of -this software and associated documentation files (the "Software"), to deal in -the Software without restriction, including without limitation the rights to -use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies -of the Software, and to permit persons to whom the Software is furnished to do -so, subject to the following conditions: -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. ------------------------------------------------------------------------------- -ALTERNATIVE B - Public Domain (www.unlicense.org) -This is free and unencumbered software released into the public domain. -Anyone is free to copy, modify, publish, use, compile, sell, or distribute this -software, either in source code form or as a compiled binary, for any purpose, -commercial or non-commercial, and by any means. -In jurisdictions that recognize copyright laws, the author or authors of this -software dedicate any and all copyright interest in the software to the public -domain. We make this dedication for the benefit of the public at large and to -the detriment of our heirs and successors. We intend this dedication to be an -overt act of relinquishment in perpetuity of all present and future rights to -this software under copyright law. -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN -ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION -WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ------------------------------------------------------------------------------- -*/ diff --git a/lib/stb_image.onyx b/lib/stb_image.onyx deleted file mode 100644 index d937507..0000000 --- a/lib/stb_image.onyx +++ /dev/null @@ -1,13 +0,0 @@ -package stb_image - -#library "stb_image" - -#foreign "stb_image" { - stbi_load :: (filename: cstr, width: ^i32, height: ^i32, channels: ^i32, desired_channels: i32) -> ^u8 --- - stbi_image_free :: (image_data: ^u8) -> void --- -} - -#export "stbi_heap_alloc" calloc -#export "stbi_heap_resize" cresize -#export "stbi_heap_free" cfree - diff --git a/lib/stb_rect_pack.h b/lib/stb_rect_pack.h deleted file mode 100644 index ab24c48..0000000 --- a/lib/stb_rect_pack.h +++ /dev/null @@ -1,623 +0,0 @@ -// stb_rect_pack.h - v1.01 - public domain - rectangle packing -// Sean Barrett 2014 -// -// Useful for e.g. packing rectangular textures into an atlas. -// Does not do rotation. -// -// Before #including, -// -// #define STB_RECT_PACK_IMPLEMENTATION -// -// in the file that you want to have the implementation. -// -// Not necessarily the awesomest packing method, but better than -// the totally naive one in stb_truetype (which is primarily what -// this is meant to replace). -// -// Has only had a few tests run, may have issues. -// -// More docs to come. -// -// No memory allocations; uses qsort() and assert() from stdlib. -// Can override those by defining STBRP_SORT and STBRP_ASSERT. -// -// This library currently uses the Skyline Bottom-Left algorithm. -// -// Please note: better rectangle packers are welcome! Please -// implement them to the same API, but with a different init -// function. -// -// Credits -// -// Library -// Sean Barrett -// Minor features -// Martins Mozeiko -// github:IntellectualKitty -// -// Bugfixes / warning fixes -// Jeremy Jaussaud -// Fabian Giesen -// -// Version history: -// -// 1.01 (2021-07-11) always use large rect mode, expose STBRP__MAXVAL in public section -// 1.00 (2019-02-25) avoid small space waste; gracefully fail too-wide rectangles -// 0.99 (2019-02-07) warning fixes -// 0.11 (2017-03-03) return packing success/fail result -// 0.10 (2016-10-25) remove cast-away-const to avoid warnings -// 0.09 (2016-08-27) fix compiler warnings -// 0.08 (2015-09-13) really fix bug with empty rects (w=0 or h=0) -// 0.07 (2015-09-13) fix bug with empty rects (w=0 or h=0) -// 0.06 (2015-04-15) added STBRP_SORT to allow replacing qsort -// 0.05: added STBRP_ASSERT to allow replacing assert -// 0.04: fixed minor bug in STBRP_LARGE_RECTS support -// 0.01: initial release -// -// LICENSE -// -// See end of file for license information. - -////////////////////////////////////////////////////////////////////////////// -// -// INCLUDE SECTION -// - -#ifndef STB_INCLUDE_STB_RECT_PACK_H -#define STB_INCLUDE_STB_RECT_PACK_H - -#define STB_RECT_PACK_VERSION 1 - -#ifdef STBRP_STATIC -#define STBRP_DEF static -#else -#define STBRP_DEF extern -#endif - -#ifdef __cplusplus -extern "C" { -#endif - -typedef struct stbrp_context stbrp_context; -typedef struct stbrp_node stbrp_node; -typedef struct stbrp_rect stbrp_rect; - -typedef int stbrp_coord; - -#define STBRP__MAXVAL 0x7fffffff -// Mostly for internal use, but this is the maximum supported coordinate value. - -STBRP_DEF int stbrp_pack_rects (stbrp_context *context, stbrp_rect *rects, int num_rects); -// Assign packed locations to rectangles. The rectangles are of type -// 'stbrp_rect' defined below, stored in the array 'rects', and there -// are 'num_rects' many of them. -// -// Rectangles which are successfully packed have the 'was_packed' flag -// set to a non-zero value and 'x' and 'y' store the minimum location -// on each axis (i.e. bottom-left in cartesian coordinates, top-left -// if you imagine y increasing downwards). Rectangles which do not fit -// have the 'was_packed' flag set to 0. -// -// You should not try to access the 'rects' array from another thread -// while this function is running, as the function temporarily reorders -// the array while it executes. -// -// To pack into another rectangle, you need to call stbrp_init_target -// again. To continue packing into the same rectangle, you can call -// this function again. Calling this multiple times with multiple rect -// arrays will probably produce worse packing results than calling it -// a single time with the full rectangle array, but the option is -// available. -// -// The function returns 1 if all of the rectangles were successfully -// packed and 0 otherwise. - -struct stbrp_rect -{ - // reserved for your use: - int id; - - // input: - stbrp_coord w, h; - - // output: - stbrp_coord x, y; - int was_packed; // non-zero if valid packing - -}; // 16 bytes, nominally - - -STBRP_DEF void stbrp_init_target (stbrp_context *context, int width, int height, stbrp_node *nodes, int num_nodes); -// Initialize a rectangle packer to: -// pack a rectangle that is 'width' by 'height' in dimensions -// using temporary storage provided by the array 'nodes', which is 'num_nodes' long -// -// You must call this function every time you start packing into a new target. -// -// There is no "shutdown" function. The 'nodes' memory must stay valid for -// the following stbrp_pack_rects() call (or calls), but can be freed after -// the call (or calls) finish. -// -// Note: to guarantee best results, either: -// 1. make sure 'num_nodes' >= 'width' -// or 2. call stbrp_allow_out_of_mem() defined below with 'allow_out_of_mem = 1' -// -// If you don't do either of the above things, widths will be quantized to multiples -// of small integers to guarantee the algorithm doesn't run out of temporary storage. -// -// If you do #2, then the non-quantized algorithm will be used, but the algorithm -// may run out of temporary storage and be unable to pack some rectangles. - -STBRP_DEF void stbrp_setup_allow_out_of_mem (stbrp_context *context, int allow_out_of_mem); -// Optionally call this function after init but before doing any packing to -// change the handling of the out-of-temp-memory scenario, described above. -// If you call init again, this will be reset to the default (false). - - -STBRP_DEF void stbrp_setup_heuristic (stbrp_context *context, int heuristic); -// Optionally select which packing heuristic the library should use. Different -// heuristics will produce better/worse results for different data sets. -// If you call init again, this will be reset to the default. - -enum -{ - STBRP_HEURISTIC_Skyline_default=0, - STBRP_HEURISTIC_Skyline_BL_sortHeight = STBRP_HEURISTIC_Skyline_default, - STBRP_HEURISTIC_Skyline_BF_sortHeight -}; - - -////////////////////////////////////////////////////////////////////////////// -// -// the details of the following structures don't matter to you, but they must -// be visible so you can handle the memory allocations for them - -struct stbrp_node -{ - stbrp_coord x,y; - stbrp_node *next; -}; - -struct stbrp_context -{ - int width; - int height; - int align; - int init_mode; - int heuristic; - int num_nodes; - stbrp_node *active_head; - stbrp_node *free_head; - stbrp_node extra[2]; // we allocate two extra nodes so optimal user-node-count is 'width' not 'width+2' -}; - -#ifdef __cplusplus -} -#endif - -#endif - -////////////////////////////////////////////////////////////////////////////// -// -// IMPLEMENTATION SECTION -// - -#ifdef STB_RECT_PACK_IMPLEMENTATION -#ifndef STBRP_SORT -#include -#define STBRP_SORT qsort -#endif - -#ifndef STBRP_ASSERT -#include -#define STBRP_ASSERT assert -#endif - -#ifdef _MSC_VER -#define STBRP__NOTUSED(v) (void)(v) -#define STBRP__CDECL __cdecl -#else -#define STBRP__NOTUSED(v) (void)sizeof(v) -#define STBRP__CDECL -#endif - -enum -{ - STBRP__INIT_skyline = 1 -}; - -STBRP_DEF void stbrp_setup_heuristic(stbrp_context *context, int heuristic) -{ - switch (context->init_mode) { - case STBRP__INIT_skyline: - STBRP_ASSERT(heuristic == STBRP_HEURISTIC_Skyline_BL_sortHeight || heuristic == STBRP_HEURISTIC_Skyline_BF_sortHeight); - context->heuristic = heuristic; - break; - default: - STBRP_ASSERT(0); - } -} - -STBRP_DEF void stbrp_setup_allow_out_of_mem(stbrp_context *context, int allow_out_of_mem) -{ - if (allow_out_of_mem) - // if it's ok to run out of memory, then don't bother aligning them; - // this gives better packing, but may fail due to OOM (even though - // the rectangles easily fit). @TODO a smarter approach would be to only - // quantize once we've hit OOM, then we could get rid of this parameter. - context->align = 1; - else { - // if it's not ok to run out of memory, then quantize the widths - // so that num_nodes is always enough nodes. - // - // I.e. num_nodes * align >= width - // align >= width / num_nodes - // align = ceil(width/num_nodes) - - context->align = (context->width + context->num_nodes-1) / context->num_nodes; - } -} - -STBRP_DEF void stbrp_init_target(stbrp_context *context, int width, int height, stbrp_node *nodes, int num_nodes) -{ - int i; - - for (i=0; i < num_nodes-1; ++i) - nodes[i].next = &nodes[i+1]; - nodes[i].next = NULL; - context->init_mode = STBRP__INIT_skyline; - context->heuristic = STBRP_HEURISTIC_Skyline_default; - context->free_head = &nodes[0]; - context->active_head = &context->extra[0]; - context->width = width; - context->height = height; - context->num_nodes = num_nodes; - stbrp_setup_allow_out_of_mem(context, 0); - - // node 0 is the full width, node 1 is the sentinel (lets us not store width explicitly) - context->extra[0].x = 0; - context->extra[0].y = 0; - context->extra[0].next = &context->extra[1]; - context->extra[1].x = (stbrp_coord) width; - context->extra[1].y = (1<<30); - context->extra[1].next = NULL; -} - -// find minimum y position if it starts at x1 -static int stbrp__skyline_find_min_y(stbrp_context *c, stbrp_node *first, int x0, int width, int *pwaste) -{ - stbrp_node *node = first; - int x1 = x0 + width; - int min_y, visited_width, waste_area; - - STBRP__NOTUSED(c); - - STBRP_ASSERT(first->x <= x0); - - #if 0 - // skip in case we're past the node - while (node->next->x <= x0) - ++node; - #else - STBRP_ASSERT(node->next->x > x0); // we ended up handling this in the caller for efficiency - #endif - - STBRP_ASSERT(node->x <= x0); - - min_y = 0; - waste_area = 0; - visited_width = 0; - while (node->x < x1) { - if (node->y > min_y) { - // raise min_y higher. - // we've accounted for all waste up to min_y, - // but we'll now add more waste for everything we've visted - waste_area += visited_width * (node->y - min_y); - min_y = node->y; - // the first time through, visited_width might be reduced - if (node->x < x0) - visited_width += node->next->x - x0; - else - visited_width += node->next->x - node->x; - } else { - // add waste area - int under_width = node->next->x - node->x; - if (under_width + visited_width > width) - under_width = width - visited_width; - waste_area += under_width * (min_y - node->y); - visited_width += under_width; - } - node = node->next; - } - - *pwaste = waste_area; - return min_y; -} - -typedef struct -{ - int x,y; - stbrp_node **prev_link; -} stbrp__findresult; - -static stbrp__findresult stbrp__skyline_find_best_pos(stbrp_context *c, int width, int height) -{ - int best_waste = (1<<30), best_x, best_y = (1 << 30); - stbrp__findresult fr; - stbrp_node **prev, *node, *tail, **best = NULL; - - // align to multiple of c->align - width = (width + c->align - 1); - width -= width % c->align; - STBRP_ASSERT(width % c->align == 0); - - // if it can't possibly fit, bail immediately - if (width > c->width || height > c->height) { - fr.prev_link = NULL; - fr.x = fr.y = 0; - return fr; - } - - node = c->active_head; - prev = &c->active_head; - while (node->x + width <= c->width) { - int y,waste; - y = stbrp__skyline_find_min_y(c, node, node->x, width, &waste); - if (c->heuristic == STBRP_HEURISTIC_Skyline_BL_sortHeight) { // actually just want to test BL - // bottom left - if (y < best_y) { - best_y = y; - best = prev; - } - } else { - // best-fit - if (y + height <= c->height) { - // can only use it if it first vertically - if (y < best_y || (y == best_y && waste < best_waste)) { - best_y = y; - best_waste = waste; - best = prev; - } - } - } - prev = &node->next; - node = node->next; - } - - best_x = (best == NULL) ? 0 : (*best)->x; - - // if doing best-fit (BF), we also have to try aligning right edge to each node position - // - // e.g, if fitting - // - // ____________________ - // |____________________| - // - // into - // - // | | - // | ____________| - // |____________| - // - // then right-aligned reduces waste, but bottom-left BL is always chooses left-aligned - // - // This makes BF take about 2x the time - - if (c->heuristic == STBRP_HEURISTIC_Skyline_BF_sortHeight) { - tail = c->active_head; - node = c->active_head; - prev = &c->active_head; - // find first node that's admissible - while (tail->x < width) - tail = tail->next; - while (tail) { - int xpos = tail->x - width; - int y,waste; - STBRP_ASSERT(xpos >= 0); - // find the left position that matches this - while (node->next->x <= xpos) { - prev = &node->next; - node = node->next; - } - STBRP_ASSERT(node->next->x > xpos && node->x <= xpos); - y = stbrp__skyline_find_min_y(c, node, xpos, width, &waste); - if (y + height <= c->height) { - if (y <= best_y) { - if (y < best_y || waste < best_waste || (waste==best_waste && xpos < best_x)) { - best_x = xpos; - STBRP_ASSERT(y <= best_y); - best_y = y; - best_waste = waste; - best = prev; - } - } - } - tail = tail->next; - } - } - - fr.prev_link = best; - fr.x = best_x; - fr.y = best_y; - return fr; -} - -static stbrp__findresult stbrp__skyline_pack_rectangle(stbrp_context *context, int width, int height) -{ - // find best position according to heuristic - stbrp__findresult res = stbrp__skyline_find_best_pos(context, width, height); - stbrp_node *node, *cur; - - // bail if: - // 1. it failed - // 2. the best node doesn't fit (we don't always check this) - // 3. we're out of memory - if (res.prev_link == NULL || res.y + height > context->height || context->free_head == NULL) { - res.prev_link = NULL; - return res; - } - - // on success, create new node - node = context->free_head; - node->x = (stbrp_coord) res.x; - node->y = (stbrp_coord) (res.y + height); - - context->free_head = node->next; - - // insert the new node into the right starting point, and - // let 'cur' point to the remaining nodes needing to be - // stiched back in - - cur = *res.prev_link; - if (cur->x < res.x) { - // preserve the existing one, so start testing with the next one - stbrp_node *next = cur->next; - cur->next = node; - cur = next; - } else { - *res.prev_link = node; - } - - // from here, traverse cur and free the nodes, until we get to one - // that shouldn't be freed - while (cur->next && cur->next->x <= res.x + width) { - stbrp_node *next = cur->next; - // move the current node to the free list - cur->next = context->free_head; - context->free_head = cur; - cur = next; - } - - // stitch the list back in - node->next = cur; - - if (cur->x < res.x + width) - cur->x = (stbrp_coord) (res.x + width); - -#ifdef _DEBUG - cur = context->active_head; - while (cur->x < context->width) { - STBRP_ASSERT(cur->x < cur->next->x); - cur = cur->next; - } - STBRP_ASSERT(cur->next == NULL); - - { - int count=0; - cur = context->active_head; - while (cur) { - cur = cur->next; - ++count; - } - cur = context->free_head; - while (cur) { - cur = cur->next; - ++count; - } - STBRP_ASSERT(count == context->num_nodes+2); - } -#endif - - return res; -} - -static int STBRP__CDECL rect_height_compare(const void *a, const void *b) -{ - const stbrp_rect *p = (const stbrp_rect *) a; - const stbrp_rect *q = (const stbrp_rect *) b; - if (p->h > q->h) - return -1; - if (p->h < q->h) - return 1; - return (p->w > q->w) ? -1 : (p->w < q->w); -} - -static int STBRP__CDECL rect_original_order(const void *a, const void *b) -{ - const stbrp_rect *p = (const stbrp_rect *) a; - const stbrp_rect *q = (const stbrp_rect *) b; - return (p->was_packed < q->was_packed) ? -1 : (p->was_packed > q->was_packed); -} - -STBRP_DEF int stbrp_pack_rects(stbrp_context *context, stbrp_rect *rects, int num_rects) -{ - int i, all_rects_packed = 1; - - // we use the 'was_packed' field internally to allow sorting/unsorting - for (i=0; i < num_rects; ++i) { - rects[i].was_packed = i; - } - - // sort according to heuristic - STBRP_SORT(rects, num_rects, sizeof(rects[0]), rect_height_compare); - - for (i=0; i < num_rects; ++i) { - if (rects[i].w == 0 || rects[i].h == 0) { - rects[i].x = rects[i].y = 0; // empty rect needs no space - } else { - stbrp__findresult fr = stbrp__skyline_pack_rectangle(context, rects[i].w, rects[i].h); - if (fr.prev_link) { - rects[i].x = (stbrp_coord) fr.x; - rects[i].y = (stbrp_coord) fr.y; - } else { - rects[i].x = rects[i].y = STBRP__MAXVAL; - } - } - } - - // unsort - STBRP_SORT(rects, num_rects, sizeof(rects[0]), rect_original_order); - - // set was_packed flags and all_rects_packed status - for (i=0; i < num_rects; ++i) { - rects[i].was_packed = !(rects[i].x == STBRP__MAXVAL && rects[i].y == STBRP__MAXVAL); - if (!rects[i].was_packed) - all_rects_packed = 0; - } - - // return the all_rects_packed status - return all_rects_packed; -} -#endif - -/* ------------------------------------------------------------------------------- -This software is available under 2 licenses -- choose whichever you prefer. ------------------------------------------------------------------------------- -ALTERNATIVE A - MIT License -Copyright (c) 2017 Sean Barrett -Permission is hereby granted, free of charge, to any person obtaining a copy of -this software and associated documentation files (the "Software"), to deal in -the Software without restriction, including without limitation the rights to -use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies -of the Software, and to permit persons to whom the Software is furnished to do -so, subject to the following conditions: -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. ------------------------------------------------------------------------------- -ALTERNATIVE B - Public Domain (www.unlicense.org) -This is free and unencumbered software released into the public domain. -Anyone is free to copy, modify, publish, use, compile, sell, or distribute this -software, either in source code form or as a compiled binary, for any purpose, -commercial or non-commercial, and by any means. -In jurisdictions that recognize copyright laws, the author or authors of this -software dedicate any and all copyright interest in the software to the public -domain. We make this dedication for the benefit of the public at large and to -the detriment of our heirs and successors. We intend this dedication to be an -overt act of relinquishment in perpetuity of all present and future rights to -this software under copyright law. -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN -ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION -WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ------------------------------------------------------------------------------- -*/ \ No newline at end of file diff --git a/lib/stb_truetype.c b/lib/stb_truetype.c deleted file mode 100644 index 0ae528a..0000000 --- a/lib/stb_truetype.c +++ /dev/null @@ -1,90 +0,0 @@ -#define ONYX_LIBRARY_NAME stb_truetype -#include "onyx_library.h" - -static wasm_func_t* heap_alloc = NULL; -static void *__onyx_heap_alloc_wrapper(int size, void* userdata) { - if (heap_alloc == NULL) { - wasm_extern_t *heap_alloc_extern = runtime->wasm_extern_lookup_by_name(runtime->wasm_module, runtime->wasm_instance, "stbtt_heap_alloc"); - heap_alloc = runtime->wasm_extern_as_func(heap_alloc_extern); - } - - wasm_val_t args[] = { WASM_I32_VAL(size) }; - wasm_val_t results[1]; - wasm_val_vec_t args_arr = WASM_ARRAY_VEC(args); - wasm_val_vec_t results_arr = WASM_ARRAY_VEC(results); - - runtime->wasm_func_call(heap_alloc, &args_arr, &results_arr); - return ONYX_PTR(results[0].of.i32); -} - -static wasm_func_t* heap_free = NULL; -static void __onyx_heap_free_wrapper(void *ptr, void* userdata) { - if (heap_free == NULL) { - wasm_extern_t *heap_free_extern = runtime->wasm_extern_lookup_by_name(runtime->wasm_module, runtime->wasm_instance, "stbtt_heap_free"); - heap_free = runtime->wasm_extern_as_func(heap_free_extern); - } - - int onyx_ptr = (int) ((char*) ptr - runtime->wasm_memory_data(runtime->wasm_memory)); - - wasm_val_t args[] = { WASM_I32_VAL(onyx_ptr) }; - wasm_val_vec_t results = {0,0}; - wasm_val_vec_t args_arr = WASM_ARRAY_VEC(args); - - runtime->wasm_func_call(heap_free, &args_arr, &results); -} - -#define STBTT_malloc __onyx_heap_alloc_wrapper -#define STBTT_free __onyx_heap_free_wrapper - -#define STB_TRUETYPE_IMPLEMENTATION -#define STB_RECT_PACK_IMPLEMENTATION -#include "stb_rect_pack.h" -#include "stb_truetype.h" - - -#define PTR WASM_I32 -#define INT WASM_I32 -#define FLOAT WASM_F32 -#define PARAM(n, k) (params->data[n].of.k) - -// -// Only wrapping the small subset of the features that I need. -// -ONYX_DEF(stbtt_PackBegin, (PTR, PTR, INT, INT, INT, INT), (INT)) { - results->data[0] = WASM_I32_VAL(stbtt_PackBegin(ONYX_PTR(PARAM(0, i32)), ONYX_PTR(PARAM(1, i32)), PARAM(2, i32), PARAM(3, i32), PARAM(4, i32), PARAM(5, i32), NULL)); - return NULL; -} - -ONYX_DEF(stbtt_PackEnd, (PTR), ()) { - stbtt_PackEnd(ONYX_PTR(PARAM(0, i32))); - return NULL; -} - -ONYX_DEF(stbtt_PackSetOversampling, (PTR, INT, INT), ()) { - stbtt_PackSetOversampling(ONYX_PTR(PARAM(0, i32)), PARAM(1, i32), PARAM(2, i32)); - return NULL; -} - -ONYX_DEF(stbtt_PackFontRange, (PTR, PTR, INT, FLOAT, INT, INT, PTR), (INT)) { - results->data[0] = WASM_I32_VAL( - stbtt_PackFontRange(ONYX_PTR(PARAM(0, i32)), ONYX_PTR(PARAM(1, i32)), - PARAM(2, i32), PARAM(3, f32), PARAM(4, i32), PARAM(5, i32), ONYX_PTR(PARAM(6, i32))) - ); - - return NULL; -} - -ONYX_DEF(stbtt_GetPackedQuad, (PTR, INT, INT, INT, PTR, PTR, PTR, INT), ()) { - stbtt_GetPackedQuad(ONYX_PTR(PARAM(0, i32)), PARAM(1, i32), PARAM(2, i32), PARAM(3, i32), ONYX_PTR(PARAM(4, i32)), ONYX_PTR(PARAM(5, i32)), ONYX_PTR(PARAM(6, i32)), PARAM(7, i32)); - return NULL; -} - -ONYX_LIBRARY { - ONYX_FUNC(stbtt_PackBegin) - ONYX_FUNC(stbtt_PackEnd) - ONYX_FUNC(stbtt_PackSetOversampling) - ONYX_FUNC(stbtt_PackFontRange) - ONYX_FUNC(stbtt_GetPackedQuad) - - NULL -}; diff --git a/lib/stb_truetype.h b/lib/stb_truetype.h deleted file mode 100644 index 5e2a2e4..0000000 --- a/lib/stb_truetype.h +++ /dev/null @@ -1,5077 +0,0 @@ -// stb_truetype.h - v1.26 - public domain -// authored from 2009-2021 by Sean Barrett / RAD Game Tools -// -// ======================================================================= -// -// NO SECURITY GUARANTEE -- DO NOT USE THIS ON UNTRUSTED FONT FILES -// -// This library does no range checking of the offsets found in the file, -// meaning an attacker can use it to read arbitrary memory. -// -// ======================================================================= -// -// This library processes TrueType files: -// parse files -// extract glyph metrics -// extract glyph shapes -// render glyphs to one-channel bitmaps with antialiasing (box filter) -// render glyphs to one-channel SDF bitmaps (signed-distance field/function) -// -// Todo: -// non-MS cmaps -// crashproof on bad data -// hinting? (no longer patented) -// cleartype-style AA? -// optimize: use simple memory allocator for intermediates -// optimize: build edge-list directly from curves -// optimize: rasterize directly from curves? -// -// ADDITIONAL CONTRIBUTORS -// -// Mikko Mononen: compound shape support, more cmap formats -// Tor Andersson: kerning, subpixel rendering -// Dougall Johnson: OpenType / Type 2 font handling -// Daniel Ribeiro Maciel: basic GPOS-based kerning -// -// Misc other: -// Ryan Gordon -// Simon Glass -// github:IntellectualKitty -// Imanol Celaya -// Daniel Ribeiro Maciel -// -// Bug/warning reports/fixes: -// "Zer" on mollyrocket Fabian "ryg" Giesen github:NiLuJe -// Cass Everitt Martins Mozeiko github:aloucks -// stoiko (Haemimont Games) Cap Petschulat github:oyvindjam -// Brian Hook Omar Cornut github:vassvik -// Walter van Niftrik Ryan Griege -// David Gow Peter LaValle -// David Given Sergey Popov -// Ivan-Assen Ivanov Giumo X. Clanjor -// Anthony Pesch Higor Euripedes -// Johan Duparc Thomas Fields -// Hou Qiming Derek Vinyard -// Rob Loach Cort Stratton -// Kenney Phillis Jr. Brian Costabile -// Ken Voskuil (kaesve) -// -// VERSION HISTORY -// -// 1.26 (2021-08-28) fix broken rasterizer -// 1.25 (2021-07-11) many fixes -// 1.24 (2020-02-05) fix warning -// 1.23 (2020-02-02) query SVG data for glyphs; query whole kerning table (but only kern not GPOS) -// 1.22 (2019-08-11) minimize missing-glyph duplication; fix kerning if both 'GPOS' and 'kern' are defined -// 1.21 (2019-02-25) fix warning -// 1.20 (2019-02-07) PackFontRange skips missing codepoints; GetScaleFontVMetrics() -// 1.19 (2018-02-11) GPOS kerning, STBTT_fmod -// 1.18 (2018-01-29) add missing function -// 1.17 (2017-07-23) make more arguments const; doc fix -// 1.16 (2017-07-12) SDF support -// 1.15 (2017-03-03) make more arguments const -// 1.14 (2017-01-16) num-fonts-in-TTC function -// 1.13 (2017-01-02) support OpenType fonts, certain Apple fonts -// 1.12 (2016-10-25) suppress warnings about casting away const with -Wcast-qual -// 1.11 (2016-04-02) fix unused-variable warning -// 1.10 (2016-04-02) user-defined fabs(); rare memory leak; remove duplicate typedef -// 1.09 (2016-01-16) warning fix; avoid crash on outofmem; use allocation userdata properly -// 1.08 (2015-09-13) document stbtt_Rasterize(); fixes for vertical & horizontal edges -// 1.07 (2015-08-01) allow PackFontRanges to accept arrays of sparse codepoints; -// variant PackFontRanges to pack and render in separate phases; -// fix stbtt_GetFontOFfsetForIndex (never worked for non-0 input?); -// fixed an assert() bug in the new rasterizer -// replace assert() with STBTT_assert() in new rasterizer -// -// Full history can be found at the end of this file. -// -// LICENSE -// -// See end of file for license information. -// -// USAGE -// -// Include this file in whatever places need to refer to it. In ONE C/C++ -// file, write: -// #define STB_TRUETYPE_IMPLEMENTATION -// before the #include of this file. This expands out the actual -// implementation into that C/C++ file. -// -// To make the implementation private to the file that generates the implementation, -// #define STBTT_STATIC -// -// Simple 3D API (don't ship this, but it's fine for tools and quick start) -// stbtt_BakeFontBitmap() -- bake a font to a bitmap for use as texture -// stbtt_GetBakedQuad() -- compute quad to draw for a given char -// -// Improved 3D API (more shippable): -// #include "stb_rect_pack.h" -- optional, but you really want it -// stbtt_PackBegin() -// stbtt_PackSetOversampling() -- for improved quality on small fonts -// stbtt_PackFontRanges() -- pack and renders -// stbtt_PackEnd() -// stbtt_GetPackedQuad() -// -// "Load" a font file from a memory buffer (you have to keep the buffer loaded) -// stbtt_InitFont() -// stbtt_GetFontOffsetForIndex() -- indexing for TTC font collections -// stbtt_GetNumberOfFonts() -- number of fonts for TTC font collections -// -// Render a unicode codepoint to a bitmap -// stbtt_GetCodepointBitmap() -- allocates and returns a bitmap -// stbtt_MakeCodepointBitmap() -- renders into bitmap you provide -// stbtt_GetCodepointBitmapBox() -- how big the bitmap must be -// -// Character advance/positioning -// stbtt_GetCodepointHMetrics() -// stbtt_GetFontVMetrics() -// stbtt_GetFontVMetricsOS2() -// stbtt_GetCodepointKernAdvance() -// -// Starting with version 1.06, the rasterizer was replaced with a new, -// faster and generally-more-precise rasterizer. The new rasterizer more -// accurately measures pixel coverage for anti-aliasing, except in the case -// where multiple shapes overlap, in which case it overestimates the AA pixel -// coverage. Thus, anti-aliasing of intersecting shapes may look wrong. If -// this turns out to be a problem, you can re-enable the old rasterizer with -// #define STBTT_RASTERIZER_VERSION 1 -// which will incur about a 15% speed hit. -// -// ADDITIONAL DOCUMENTATION -// -// Immediately after this block comment are a series of sample programs. -// -// After the sample programs is the "header file" section. This section -// includes documentation for each API function. -// -// Some important concepts to understand to use this library: -// -// Codepoint -// Characters are defined by unicode codepoints, e.g. 65 is -// uppercase A, 231 is lowercase c with a cedilla, 0x7e30 is -// the hiragana for "ma". -// -// Glyph -// A visual character shape (every codepoint is rendered as -// some glyph) -// -// Glyph index -// A font-specific integer ID representing a glyph -// -// Baseline -// Glyph shapes are defined relative to a baseline, which is the -// bottom of uppercase characters. Characters extend both above -// and below the baseline. -// -// Current Point -// As you draw text to the screen, you keep track of a "current point" -// which is the origin of each character. The current point's vertical -// position is the baseline. Even "baked fonts" use this model. -// -// Vertical Font Metrics -// The vertical qualities of the font, used to vertically position -// and space the characters. See docs for stbtt_GetFontVMetrics. -// -// Font Size in Pixels or Points -// The preferred interface for specifying font sizes in stb_truetype -// is to specify how tall the font's vertical extent should be in pixels. -// If that sounds good enough, skip the next paragraph. -// -// Most font APIs instead use "points", which are a common typographic -// measurement for describing font size, defined as 72 points per inch. -// stb_truetype provides a point API for compatibility. However, true -// "per inch" conventions don't make much sense on computer displays -// since different monitors have different number of pixels per -// inch. For example, Windows traditionally uses a convention that -// there are 96 pixels per inch, thus making 'inch' measurements have -// nothing to do with inches, and thus effectively defining a point to -// be 1.333 pixels. Additionally, the TrueType font data provides -// an explicit scale factor to scale a given font's glyphs to points, -// but the author has observed that this scale factor is often wrong -// for non-commercial fonts, thus making fonts scaled in points -// according to the TrueType spec incoherently sized in practice. -// -// DETAILED USAGE: -// -// Scale: -// Select how high you want the font to be, in points or pixels. -// Call ScaleForPixelHeight or ScaleForMappingEmToPixels to compute -// a scale factor SF that will be used by all other functions. -// -// Baseline: -// You need to select a y-coordinate that is the baseline of where -// your text will appear. Call GetFontBoundingBox to get the baseline-relative -// bounding box for all characters. SF*-y0 will be the distance in pixels -// that the worst-case character could extend above the baseline, so if -// you want the top edge of characters to appear at the top of the -// screen where y=0, then you would set the baseline to SF*-y0. -// -// Current point: -// Set the current point where the first character will appear. The -// first character could extend left of the current point; this is font -// dependent. You can either choose a current point that is the leftmost -// point and hope, or add some padding, or check the bounding box or -// left-side-bearing of the first character to be displayed and set -// the current point based on that. -// -// Displaying a character: -// Compute the bounding box of the character. It will contain signed values -// relative to . I.e. if it returns x0,y0,x1,y1, -// then the character should be displayed in the rectangle from -// to = 32 && *text < 128) { - stbtt_aligned_quad q; - stbtt_GetBakedQuad(cdata, 512,512, *text-32, &x,&y,&q,1);//1=opengl & d3d10+,0=d3d9 - glTexCoord2f(q.s0,q.t0); glVertex2f(q.x0,q.y0); - glTexCoord2f(q.s1,q.t0); glVertex2f(q.x1,q.y0); - glTexCoord2f(q.s1,q.t1); glVertex2f(q.x1,q.y1); - glTexCoord2f(q.s0,q.t1); glVertex2f(q.x0,q.y1); - } - ++text; - } - glEnd(); -} -#endif -// -// -////////////////////////////////////////////////////////////////////////////// -// -// Complete program (this compiles): get a single bitmap, print as ASCII art -// -#if 0 -#include -#define STB_TRUETYPE_IMPLEMENTATION // force following include to generate implementation -#include "stb_truetype.h" - -char ttf_buffer[1<<25]; - -int main(int argc, char **argv) -{ - stbtt_fontinfo font; - unsigned char *bitmap; - int w,h,i,j,c = (argc > 1 ? atoi(argv[1]) : 'a'), s = (argc > 2 ? atoi(argv[2]) : 20); - - fread(ttf_buffer, 1, 1<<25, fopen(argc > 3 ? argv[3] : "c:/windows/fonts/arialbd.ttf", "rb")); - - stbtt_InitFont(&font, ttf_buffer, stbtt_GetFontOffsetForIndex(ttf_buffer,0)); - bitmap = stbtt_GetCodepointBitmap(&font, 0,stbtt_ScaleForPixelHeight(&font, s), c, &w, &h, 0,0); - - for (j=0; j < h; ++j) { - for (i=0; i < w; ++i) - putchar(" .:ioVM@"[bitmap[j*w+i]>>5]); - putchar('\n'); - } - return 0; -} -#endif -// -// Output: -// -// .ii. -// @@@@@@. -// V@Mio@@o -// :i. V@V -// :oM@@M -// :@@@MM@M -// @@o o@M -// :@@. M@M -// @@@o@@@@ -// :M@@V:@@. -// -////////////////////////////////////////////////////////////////////////////// -// -// Complete program: print "Hello World!" banner, with bugs -// -#if 0 -char buffer[24<<20]; -unsigned char screen[20][79]; - -int main(int arg, char **argv) -{ - stbtt_fontinfo font; - int i,j,ascent,baseline,ch=0; - float scale, xpos=2; // leave a little padding in case the character extends left - char *text = "Heljo World!"; // intentionally misspelled to show 'lj' brokenness - - fread(buffer, 1, 1000000, fopen("c:/windows/fonts/arialbd.ttf", "rb")); - stbtt_InitFont(&font, buffer, 0); - - scale = stbtt_ScaleForPixelHeight(&font, 15); - stbtt_GetFontVMetrics(&font, &ascent,0,0); - baseline = (int) (ascent*scale); - - while (text[ch]) { - int advance,lsb,x0,y0,x1,y1; - float x_shift = xpos - (float) floor(xpos); - stbtt_GetCodepointHMetrics(&font, text[ch], &advance, &lsb); - stbtt_GetCodepointBitmapBoxSubpixel(&font, text[ch], scale,scale,x_shift,0, &x0,&y0,&x1,&y1); - stbtt_MakeCodepointBitmapSubpixel(&font, &screen[baseline + y0][(int) xpos + x0], x1-x0,y1-y0, 79, scale,scale,x_shift,0, text[ch]); - // note that this stomps the old data, so where character boxes overlap (e.g. 'lj') it's wrong - // because this API is really for baking character bitmaps into textures. if you want to render - // a sequence of characters, you really need to render each bitmap to a temp buffer, then - // "alpha blend" that into the working buffer - xpos += (advance * scale); - if (text[ch+1]) - xpos += scale*stbtt_GetCodepointKernAdvance(&font, text[ch],text[ch+1]); - ++ch; - } - - for (j=0; j < 20; ++j) { - for (i=0; i < 78; ++i) - putchar(" .:ioVM@"[screen[j][i]>>5]); - putchar('\n'); - } - - return 0; -} -#endif - - -////////////////////////////////////////////////////////////////////////////// -////////////////////////////////////////////////////////////////////////////// -//// -//// INTEGRATION WITH YOUR CODEBASE -//// -//// The following sections allow you to supply alternate definitions -//// of C library functions used by stb_truetype, e.g. if you don't -//// link with the C runtime library. - -#ifdef STB_TRUETYPE_IMPLEMENTATION - // #define your own (u)stbtt_int8/16/32 before including to override this - #ifndef stbtt_uint8 - typedef unsigned char stbtt_uint8; - typedef signed char stbtt_int8; - typedef unsigned short stbtt_uint16; - typedef signed short stbtt_int16; - typedef unsigned int stbtt_uint32; - typedef signed int stbtt_int32; - #endif - - typedef char stbtt__check_size32[sizeof(stbtt_int32)==4 ? 1 : -1]; - typedef char stbtt__check_size16[sizeof(stbtt_int16)==2 ? 1 : -1]; - - // e.g. #define your own STBTT_ifloor/STBTT_iceil() to avoid math.h - #ifndef STBTT_ifloor - #include - #define STBTT_ifloor(x) ((int) floor(x)) - #define STBTT_iceil(x) ((int) ceil(x)) - #endif - - #ifndef STBTT_sqrt - #include - #define STBTT_sqrt(x) sqrt(x) - #define STBTT_pow(x,y) pow(x,y) - #endif - - #ifndef STBTT_fmod - #include - #define STBTT_fmod(x,y) fmod(x,y) - #endif - - #ifndef STBTT_cos - #include - #define STBTT_cos(x) cos(x) - #define STBTT_acos(x) acos(x) - #endif - - #ifndef STBTT_fabs - #include - #define STBTT_fabs(x) fabs(x) - #endif - - // #define your own functions "STBTT_malloc" / "STBTT_free" to avoid malloc.h - #ifndef STBTT_malloc - #include - #define STBTT_malloc(x,u) ((void)(u),malloc(x)) - #define STBTT_free(x,u) ((void)(u),free(x)) - #endif - - #ifndef STBTT_assert - #include - #define STBTT_assert(x) assert(x) - #endif - - #ifndef STBTT_strlen - #include - #define STBTT_strlen(x) strlen(x) - #endif - - #ifndef STBTT_memcpy - #include - #define STBTT_memcpy memcpy - #define STBTT_memset memset - #endif -#endif - -/////////////////////////////////////////////////////////////////////////////// -/////////////////////////////////////////////////////////////////////////////// -//// -//// INTERFACE -//// -//// - -#ifndef __STB_INCLUDE_STB_TRUETYPE_H__ -#define __STB_INCLUDE_STB_TRUETYPE_H__ - -#ifdef STBTT_STATIC -#define STBTT_DEF static -#else -#define STBTT_DEF extern -#endif - -#ifdef __cplusplus -extern "C" { -#endif - -// private structure -typedef struct -{ - unsigned char *data; - int cursor; - int size; -} stbtt__buf; - -////////////////////////////////////////////////////////////////////////////// -// -// TEXTURE BAKING API -// -// If you use this API, you only have to call two functions ever. -// - -typedef struct -{ - unsigned short x0,y0,x1,y1; // coordinates of bbox in bitmap - float xoff,yoff,xadvance; -} stbtt_bakedchar; - -STBTT_DEF int stbtt_BakeFontBitmap(const unsigned char *data, int offset, // font location (use offset=0 for plain .ttf) - float pixel_height, // height of font in pixels - unsigned char *pixels, int pw, int ph, // bitmap to be filled in - int first_char, int num_chars, // characters to bake - stbtt_bakedchar *chardata); // you allocate this, it's num_chars long -// if return is positive, the first unused row of the bitmap -// if return is negative, returns the negative of the number of characters that fit -// if return is 0, no characters fit and no rows were used -// This uses a very crappy packing. - -typedef struct -{ - float x0,y0,s0,t0; // top-left - float x1,y1,s1,t1; // bottom-right -} stbtt_aligned_quad; - -STBTT_DEF void stbtt_GetBakedQuad(const stbtt_bakedchar *chardata, int pw, int ph, // same data as above - int char_index, // character to display - float *xpos, float *ypos, // pointers to current position in screen pixel space - stbtt_aligned_quad *q, // output: quad to draw - int opengl_fillrule); // true if opengl fill rule; false if DX9 or earlier -// Call GetBakedQuad with char_index = 'character - first_char', and it -// creates the quad you need to draw and advances the current position. -// -// The coordinate system used assumes y increases downwards. -// -// Characters will extend both above and below the current position; -// see discussion of "BASELINE" above. -// -// It's inefficient; you might want to c&p it and optimize it. - -STBTT_DEF void stbtt_GetScaledFontVMetrics(const unsigned char *fontdata, int index, float size, float *ascent, float *descent, float *lineGap); -// Query the font vertical metrics without having to create a font first. - - -////////////////////////////////////////////////////////////////////////////// -// -// NEW TEXTURE BAKING API -// -// This provides options for packing multiple fonts into one atlas, not -// perfectly but better than nothing. - -typedef struct -{ - unsigned short x0,y0,x1,y1; // coordinates of bbox in bitmap - float xoff,yoff,xadvance; - float xoff2,yoff2; -} stbtt_packedchar; - -typedef struct stbtt_pack_context stbtt_pack_context; -typedef struct stbtt_fontinfo stbtt_fontinfo; -#ifndef STB_RECT_PACK_VERSION -typedef struct stbrp_rect stbrp_rect; -#endif - -STBTT_DEF int stbtt_PackBegin(stbtt_pack_context *spc, unsigned char *pixels, int width, int height, int stride_in_bytes, int padding, void *alloc_context); -// Initializes a packing context stored in the passed-in stbtt_pack_context. -// Future calls using this context will pack characters into the bitmap passed -// in here: a 1-channel bitmap that is width * height. stride_in_bytes is -// the distance from one row to the next (or 0 to mean they are packed tightly -// together). "padding" is the amount of padding to leave between each -// character (normally you want '1' for bitmaps you'll use as textures with -// bilinear filtering). -// -// Returns 0 on failure, 1 on success. - -STBTT_DEF void stbtt_PackEnd (stbtt_pack_context *spc); -// Cleans up the packing context and frees all memory. - -#define STBTT_POINT_SIZE(x) (-(x)) - -STBTT_DEF int stbtt_PackFontRange(stbtt_pack_context *spc, const unsigned char *fontdata, int font_index, float font_size, - int first_unicode_char_in_range, int num_chars_in_range, stbtt_packedchar *chardata_for_range); -// Creates character bitmaps from the font_index'th font found in fontdata (use -// font_index=0 if you don't know what that is). It creates num_chars_in_range -// bitmaps for characters with unicode values starting at first_unicode_char_in_range -// and increasing. Data for how to render them is stored in chardata_for_range; -// pass these to stbtt_GetPackedQuad to get back renderable quads. -// -// font_size is the full height of the character from ascender to descender, -// as computed by stbtt_ScaleForPixelHeight. To use a point size as computed -// by stbtt_ScaleForMappingEmToPixels, wrap the point size in STBTT_POINT_SIZE() -// and pass that result as 'font_size': -// ..., 20 , ... // font max minus min y is 20 pixels tall -// ..., STBTT_POINT_SIZE(20), ... // 'M' is 20 pixels tall - -typedef struct -{ - float font_size; - int first_unicode_codepoint_in_range; // if non-zero, then the chars are continuous, and this is the first codepoint - int *array_of_unicode_codepoints; // if non-zero, then this is an array of unicode codepoints - int num_chars; - stbtt_packedchar *chardata_for_range; // output - unsigned char h_oversample, v_oversample; // don't set these, they're used internally -} stbtt_pack_range; - -STBTT_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, const unsigned char *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges); -// Creates character bitmaps from multiple ranges of characters stored in -// ranges. This will usually create a better-packed bitmap than multiple -// calls to stbtt_PackFontRange. Note that you can call this multiple -// times within a single PackBegin/PackEnd. - -STBTT_DEF void stbtt_PackSetOversampling(stbtt_pack_context *spc, unsigned int h_oversample, unsigned int v_oversample); -// Oversampling a font increases the quality by allowing higher-quality subpixel -// positioning, and is especially valuable at smaller text sizes. -// -// This function sets the amount of oversampling for all following calls to -// stbtt_PackFontRange(s) or stbtt_PackFontRangesGatherRects for a given -// pack context. The default (no oversampling) is achieved by h_oversample=1 -// and v_oversample=1. The total number of pixels required is -// h_oversample*v_oversample larger than the default; for example, 2x2 -// oversampling requires 4x the storage of 1x1. For best results, render -// oversampled textures with bilinear filtering. Look at the readme in -// stb/tests/oversample for information about oversampled fonts -// -// To use with PackFontRangesGather etc., you must set it before calls -// call to PackFontRangesGatherRects. - -STBTT_DEF void stbtt_PackSetSkipMissingCodepoints(stbtt_pack_context *spc, int skip); -// If skip != 0, this tells stb_truetype to skip any codepoints for which -// there is no corresponding glyph. If skip=0, which is the default, then -// codepoints without a glyph recived the font's "missing character" glyph, -// typically an empty box by convention. - -STBTT_DEF void stbtt_GetPackedQuad(const stbtt_packedchar *chardata, int pw, int ph, // same data as above - int char_index, // character to display - float *xpos, float *ypos, // pointers to current position in screen pixel space - stbtt_aligned_quad *q, // output: quad to draw - int align_to_integer); - -STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, const stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects); -STBTT_DEF void stbtt_PackFontRangesPackRects(stbtt_pack_context *spc, stbrp_rect *rects, int num_rects); -STBTT_DEF int stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, const stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects); -// Calling these functions in sequence is roughly equivalent to calling -// stbtt_PackFontRanges(). If you more control over the packing of multiple -// fonts, or if you want to pack custom data into a font texture, take a look -// at the source to of stbtt_PackFontRanges() and create a custom version -// using these functions, e.g. call GatherRects multiple times, -// building up a single array of rects, then call PackRects once, -// then call RenderIntoRects repeatedly. This may result in a -// better packing than calling PackFontRanges multiple times -// (or it may not). - -// this is an opaque structure that you shouldn't mess with which holds -// all the context needed from PackBegin to PackEnd. -struct stbtt_pack_context { - void *user_allocator_context; - void *pack_info; - int width; - int height; - int stride_in_bytes; - int padding; - int skip_missing; - unsigned int h_oversample, v_oversample; - unsigned char *pixels; - void *nodes; -}; - -////////////////////////////////////////////////////////////////////////////// -// -// FONT LOADING -// -// - -STBTT_DEF int stbtt_GetNumberOfFonts(const unsigned char *data); -// This function will determine the number of fonts in a font file. TrueType -// collection (.ttc) files may contain multiple fonts, while TrueType font -// (.ttf) files only contain one font. The number of fonts can be used for -// indexing with the previous function where the index is between zero and one -// less than the total fonts. If an error occurs, -1 is returned. - -STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index); -// Each .ttf/.ttc file may have more than one font. Each font has a sequential -// index number starting from 0. Call this function to get the font offset for -// a given index; it returns -1 if the index is out of range. A regular .ttf -// file will only define one font and it always be at offset 0, so it will -// return '0' for index 0, and -1 for all other indices. - -// The following structure is defined publicly so you can declare one on -// the stack or as a global or etc, but you should treat it as opaque. -struct stbtt_fontinfo -{ - void * userdata; - unsigned char * data; // pointer to .ttf file - int fontstart; // offset of start of font - - int numGlyphs; // number of glyphs, needed for range checking - - int loca,head,glyf,hhea,hmtx,kern,gpos,svg; // table locations as offset from start of .ttf - int index_map; // a cmap mapping for our chosen character encoding - int indexToLocFormat; // format needed to map from glyph index to glyph - - stbtt__buf cff; // cff font data - stbtt__buf charstrings; // the charstring index - stbtt__buf gsubrs; // global charstring subroutines index - stbtt__buf subrs; // private charstring subroutines index - stbtt__buf fontdicts; // array of font dicts - stbtt__buf fdselect; // map from glyph to fontdict -}; - -STBTT_DEF int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data, int offset); -// Given an offset into the file that defines a font, this function builds -// the necessary cached info for the rest of the system. You must allocate -// the stbtt_fontinfo yourself, and stbtt_InitFont will fill it out. You don't -// need to do anything special to free it, because the contents are pure -// value data with no additional data structures. Returns 0 on failure. - - -////////////////////////////////////////////////////////////////////////////// -// -// CHARACTER TO GLYPH-INDEX CONVERSIOn - -STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint); -// If you're going to perform multiple operations on the same character -// and you want a speed-up, call this function with the character you're -// going to process, then use glyph-based functions instead of the -// codepoint-based functions. -// Returns 0 if the character codepoint is not defined in the font. - - -////////////////////////////////////////////////////////////////////////////// -// -// CHARACTER PROPERTIES -// - -STBTT_DEF float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float pixels); -// computes a scale factor to produce a font whose "height" is 'pixels' tall. -// Height is measured as the distance from the highest ascender to the lowest -// descender; in other words, it's equivalent to calling stbtt_GetFontVMetrics -// and computing: -// scale = pixels / (ascent - descent) -// so if you prefer to measure height by the ascent only, use a similar calculation. - -STBTT_DEF float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels); -// computes a scale factor to produce a font whose EM size is mapped to -// 'pixels' tall. This is probably what traditional APIs compute, but -// I'm not positive. - -STBTT_DEF void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap); -// ascent is the coordinate above the baseline the font extends; descent -// is the coordinate below the baseline the font extends (i.e. it is typically negative) -// lineGap is the spacing between one row's descent and the next row's ascent... -// so you should advance the vertical position by "*ascent - *descent + *lineGap" -// these are expressed in unscaled coordinates, so you must multiply by -// the scale factor for a given size - -STBTT_DEF int stbtt_GetFontVMetricsOS2(const stbtt_fontinfo *info, int *typoAscent, int *typoDescent, int *typoLineGap); -// analogous to GetFontVMetrics, but returns the "typographic" values from the OS/2 -// table (specific to MS/Windows TTF files). -// -// Returns 1 on success (table present), 0 on failure. - -STBTT_DEF void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1); -// the bounding box around all possible characters - -STBTT_DEF void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing); -// leftSideBearing is the offset from the current horizontal position to the left edge of the character -// advanceWidth is the offset from the current horizontal position to the next horizontal position -// these are expressed in unscaled coordinates - -STBTT_DEF int stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2); -// an additional amount to add to the 'advance' value between ch1 and ch2 - -STBTT_DEF int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1); -// Gets the bounding box of the visible part of the glyph, in unscaled coordinates - -STBTT_DEF void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing); -STBTT_DEF int stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2); -STBTT_DEF int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1); -// as above, but takes one or more glyph indices for greater efficiency - -typedef struct stbtt_kerningentry -{ - int glyph1; // use stbtt_FindGlyphIndex - int glyph2; - int advance; -} stbtt_kerningentry; - -STBTT_DEF int stbtt_GetKerningTableLength(const stbtt_fontinfo *info); -STBTT_DEF int stbtt_GetKerningTable(const stbtt_fontinfo *info, stbtt_kerningentry* table, int table_length); -// Retrieves a complete list of all of the kerning pairs provided by the font -// stbtt_GetKerningTable never writes more than table_length entries and returns how many entries it did write. -// The table will be sorted by (a.glyph1 == b.glyph1)?(a.glyph2 < b.glyph2):(a.glyph1 < b.glyph1) - -////////////////////////////////////////////////////////////////////////////// -// -// GLYPH SHAPES (you probably don't need these, but they have to go before -// the bitmaps for C declaration-order reasons) -// - -#ifndef STBTT_vmove // you can predefine these to use different values (but why?) - enum { - STBTT_vmove=1, - STBTT_vline, - STBTT_vcurve, - STBTT_vcubic - }; -#endif - -#ifndef stbtt_vertex // you can predefine this to use different values - // (we share this with other code at RAD) - #define stbtt_vertex_type short // can't use stbtt_int16 because that's not visible in the header file - typedef struct - { - stbtt_vertex_type x,y,cx,cy,cx1,cy1; - unsigned char type,padding; - } stbtt_vertex; -#endif - -STBTT_DEF int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index); -// returns non-zero if nothing is drawn for this glyph - -STBTT_DEF int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices); -STBTT_DEF int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **vertices); -// returns # of vertices and fills *vertices with the pointer to them -// these are expressed in "unscaled" coordinates -// -// The shape is a series of contours. Each one starts with -// a STBTT_moveto, then consists of a series of mixed -// STBTT_lineto and STBTT_curveto segments. A lineto -// draws a line from previous endpoint to its x,y; a curveto -// draws a quadratic bezier from previous endpoint to -// its x,y, using cx,cy as the bezier control point. - -STBTT_DEF void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *vertices); -// frees the data allocated above - -STBTT_DEF unsigned char *stbtt_FindSVGDoc(const stbtt_fontinfo *info, int gl); -STBTT_DEF int stbtt_GetCodepointSVG(const stbtt_fontinfo *info, int unicode_codepoint, const char **svg); -STBTT_DEF int stbtt_GetGlyphSVG(const stbtt_fontinfo *info, int gl, const char **svg); -// fills svg with the character's SVG data. -// returns data size or 0 if SVG not found. - -////////////////////////////////////////////////////////////////////////////// -// -// BITMAP RENDERING -// - -STBTT_DEF void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata); -// frees the bitmap allocated below - -STBTT_DEF unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff); -// allocates a large-enough single-channel 8bpp bitmap and renders the -// specified character/glyph at the specified scale into it, with -// antialiasing. 0 is no coverage (transparent), 255 is fully covered (opaque). -// *width & *height are filled out with the width & height of the bitmap, -// which is stored left-to-right, top-to-bottom. -// -// xoff/yoff are the offset it pixel space from the glyph origin to the top-left of the bitmap - -STBTT_DEF unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff); -// the same as stbtt_GetCodepoitnBitmap, but you can specify a subpixel -// shift for the character - -STBTT_DEF void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint); -// the same as stbtt_GetCodepointBitmap, but you pass in storage for the bitmap -// in the form of 'output', with row spacing of 'out_stride' bytes. the bitmap -// is clipped to out_w/out_h bytes. Call stbtt_GetCodepointBitmapBox to get the -// width and height and positioning info for it first. - -STBTT_DEF void stbtt_MakeCodepointBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint); -// same as stbtt_MakeCodepointBitmap, but you can specify a subpixel -// shift for the character - -STBTT_DEF void stbtt_MakeCodepointBitmapSubpixelPrefilter(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int oversample_x, int oversample_y, float *sub_x, float *sub_y, int codepoint); -// same as stbtt_MakeCodepointBitmapSubpixel, but prefiltering -// is performed (see stbtt_PackSetOversampling) - -STBTT_DEF void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1); -// get the bbox of the bitmap centered around the glyph origin; so the -// bitmap width is ix1-ix0, height is iy1-iy0, and location to place -// the bitmap top left is (leftSideBearing*scale,iy0). -// (Note that the bitmap uses y-increases-down, but the shape uses -// y-increases-up, so CodepointBitmapBox and CodepointBox are inverted.) - -STBTT_DEF void stbtt_GetCodepointBitmapBoxSubpixel(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1); -// same as stbtt_GetCodepointBitmapBox, but you can specify a subpixel -// shift for the character - -// the following functions are equivalent to the above functions, but operate -// on glyph indices instead of Unicode codepoints (for efficiency) -STBTT_DEF unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff); -STBTT_DEF unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int glyph, int *width, int *height, int *xoff, int *yoff); -STBTT_DEF void stbtt_MakeGlyphBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int glyph); -STBTT_DEF void stbtt_MakeGlyphBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int glyph); -STBTT_DEF void stbtt_MakeGlyphBitmapSubpixelPrefilter(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int oversample_x, int oversample_y, float *sub_x, float *sub_y, int glyph); -STBTT_DEF void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1); -STBTT_DEF void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1); - - -// @TODO: don't expose this structure -typedef struct -{ - int w,h,stride; - unsigned char *pixels; -} stbtt__bitmap; - -// rasterize a shape with quadratic beziers into a bitmap -STBTT_DEF void stbtt_Rasterize(stbtt__bitmap *result, // 1-channel bitmap to draw into - float flatness_in_pixels, // allowable error of curve in pixels - stbtt_vertex *vertices, // array of vertices defining shape - int num_verts, // number of vertices in above array - float scale_x, float scale_y, // scale applied to input vertices - float shift_x, float shift_y, // translation applied to input vertices - int x_off, int y_off, // another translation applied to input - int invert, // if non-zero, vertically flip shape - void *userdata); // context for to STBTT_MALLOC - -////////////////////////////////////////////////////////////////////////////// -// -// Signed Distance Function (or Field) rendering - -STBTT_DEF void stbtt_FreeSDF(unsigned char *bitmap, void *userdata); -// frees the SDF bitmap allocated below - -STBTT_DEF unsigned char * stbtt_GetGlyphSDF(const stbtt_fontinfo *info, float scale, int glyph, int padding, unsigned char onedge_value, float pixel_dist_scale, int *width, int *height, int *xoff, int *yoff); -STBTT_DEF unsigned char * stbtt_GetCodepointSDF(const stbtt_fontinfo *info, float scale, int codepoint, int padding, unsigned char onedge_value, float pixel_dist_scale, int *width, int *height, int *xoff, int *yoff); -// These functions compute a discretized SDF field for a single character, suitable for storing -// in a single-channel texture, sampling with bilinear filtering, and testing against -// larger than some threshold to produce scalable fonts. -// info -- the font -// scale -- controls the size of the resulting SDF bitmap, same as it would be creating a regular bitmap -// glyph/codepoint -- the character to generate the SDF for -// padding -- extra "pixels" around the character which are filled with the distance to the character (not 0), -// which allows effects like bit outlines -// onedge_value -- value 0-255 to test the SDF against to reconstruct the character (i.e. the isocontour of the character) -// pixel_dist_scale -- what value the SDF should increase by when moving one SDF "pixel" away from the edge (on the 0..255 scale) -// if positive, > onedge_value is inside; if negative, < onedge_value is inside -// width,height -- output height & width of the SDF bitmap (including padding) -// xoff,yoff -- output origin of the character -// return value -- a 2D array of bytes 0..255, width*height in size -// -// pixel_dist_scale & onedge_value are a scale & bias that allows you to make -// optimal use of the limited 0..255 for your application, trading off precision -// and special effects. SDF values outside the range 0..255 are clamped to 0..255. -// -// Example: -// scale = stbtt_ScaleForPixelHeight(22) -// padding = 5 -// onedge_value = 180 -// pixel_dist_scale = 180/5.0 = 36.0 -// -// This will create an SDF bitmap in which the character is about 22 pixels -// high but the whole bitmap is about 22+5+5=32 pixels high. To produce a filled -// shape, sample the SDF at each pixel and fill the pixel if the SDF value -// is greater than or equal to 180/255. (You'll actually want to antialias, -// which is beyond the scope of this example.) Additionally, you can compute -// offset outlines (e.g. to stroke the character border inside & outside, -// or only outside). For example, to fill outside the character up to 3 SDF -// pixels, you would compare against (180-36.0*3)/255 = 72/255. The above -// choice of variables maps a range from 5 pixels outside the shape to -// 2 pixels inside the shape to 0..255; this is intended primarily for apply -// outside effects only (the interior range is needed to allow proper -// antialiasing of the font at *smaller* sizes) -// -// The function computes the SDF analytically at each SDF pixel, not by e.g. -// building a higher-res bitmap and approximating it. In theory the quality -// should be as high as possible for an SDF of this size & representation, but -// unclear if this is true in practice (perhaps building a higher-res bitmap -// and computing from that can allow drop-out prevention). -// -// The algorithm has not been optimized at all, so expect it to be slow -// if computing lots of characters or very large sizes. - - - -////////////////////////////////////////////////////////////////////////////// -// -// Finding the right font... -// -// You should really just solve this offline, keep your own tables -// of what font is what, and don't try to get it out of the .ttf file. -// That's because getting it out of the .ttf file is really hard, because -// the names in the file can appear in many possible encodings, in many -// possible languages, and e.g. if you need a case-insensitive comparison, -// the details of that depend on the encoding & language in a complex way -// (actually underspecified in truetype, but also gigantic). -// -// But you can use the provided functions in two possible ways: -// stbtt_FindMatchingFont() will use *case-sensitive* comparisons on -// unicode-encoded names to try to find the font you want; -// you can run this before calling stbtt_InitFont() -// -// stbtt_GetFontNameString() lets you get any of the various strings -// from the file yourself and do your own comparisons on them. -// You have to have called stbtt_InitFont() first. - - -STBTT_DEF int stbtt_FindMatchingFont(const unsigned char *fontdata, const char *name, int flags); -// returns the offset (not index) of the font that matches, or -1 if none -// if you use STBTT_MACSTYLE_DONTCARE, use a font name like "Arial Bold". -// if you use any other flag, use a font name like "Arial"; this checks -// the 'macStyle' header field; i don't know if fonts set this consistently -#define STBTT_MACSTYLE_DONTCARE 0 -#define STBTT_MACSTYLE_BOLD 1 -#define STBTT_MACSTYLE_ITALIC 2 -#define STBTT_MACSTYLE_UNDERSCORE 4 -#define STBTT_MACSTYLE_NONE 8 // <= not same as 0, this makes us check the bitfield is 0 - -STBTT_DEF int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2); -// returns 1/0 whether the first string interpreted as utf8 is identical to -// the second string interpreted as big-endian utf16... useful for strings from next func - -STBTT_DEF const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID); -// returns the string (which may be big-endian double byte, e.g. for unicode) -// and puts the length in bytes in *length. -// -// some of the values for the IDs are below; for more see the truetype spec: -// http://developer.apple.com/textfonts/TTRefMan/RM06/Chap6name.html -// http://www.microsoft.com/typography/otspec/name.htm - -enum { // platformID - STBTT_PLATFORM_ID_UNICODE =0, - STBTT_PLATFORM_ID_MAC =1, - STBTT_PLATFORM_ID_ISO =2, - STBTT_PLATFORM_ID_MICROSOFT =3 -}; - -enum { // encodingID for STBTT_PLATFORM_ID_UNICODE - STBTT_UNICODE_EID_UNICODE_1_0 =0, - STBTT_UNICODE_EID_UNICODE_1_1 =1, - STBTT_UNICODE_EID_ISO_10646 =2, - STBTT_UNICODE_EID_UNICODE_2_0_BMP=3, - STBTT_UNICODE_EID_UNICODE_2_0_FULL=4 -}; - -enum { // encodingID for STBTT_PLATFORM_ID_MICROSOFT - STBTT_MS_EID_SYMBOL =0, - STBTT_MS_EID_UNICODE_BMP =1, - STBTT_MS_EID_SHIFTJIS =2, - STBTT_MS_EID_UNICODE_FULL =10 -}; - -enum { // encodingID for STBTT_PLATFORM_ID_MAC; same as Script Manager codes - STBTT_MAC_EID_ROMAN =0, STBTT_MAC_EID_ARABIC =4, - STBTT_MAC_EID_JAPANESE =1, STBTT_MAC_EID_HEBREW =5, - STBTT_MAC_EID_CHINESE_TRAD =2, STBTT_MAC_EID_GREEK =6, - STBTT_MAC_EID_KOREAN =3, STBTT_MAC_EID_RUSSIAN =7 -}; - -enum { // languageID for STBTT_PLATFORM_ID_MICROSOFT; same as LCID... - // problematic because there are e.g. 16 english LCIDs and 16 arabic LCIDs - STBTT_MS_LANG_ENGLISH =0x0409, STBTT_MS_LANG_ITALIAN =0x0410, - STBTT_MS_LANG_CHINESE =0x0804, STBTT_MS_LANG_JAPANESE =0x0411, - STBTT_MS_LANG_DUTCH =0x0413, STBTT_MS_LANG_KOREAN =0x0412, - STBTT_MS_LANG_FRENCH =0x040c, STBTT_MS_LANG_RUSSIAN =0x0419, - STBTT_MS_LANG_GERMAN =0x0407, STBTT_MS_LANG_SPANISH =0x0409, - STBTT_MS_LANG_HEBREW =0x040d, STBTT_MS_LANG_SWEDISH =0x041D -}; - -enum { // languageID for STBTT_PLATFORM_ID_MAC - STBTT_MAC_LANG_ENGLISH =0 , STBTT_MAC_LANG_JAPANESE =11, - STBTT_MAC_LANG_ARABIC =12, STBTT_MAC_LANG_KOREAN =23, - STBTT_MAC_LANG_DUTCH =4 , STBTT_MAC_LANG_RUSSIAN =32, - STBTT_MAC_LANG_FRENCH =1 , STBTT_MAC_LANG_SPANISH =6 , - STBTT_MAC_LANG_GERMAN =2 , STBTT_MAC_LANG_SWEDISH =5 , - STBTT_MAC_LANG_HEBREW =10, STBTT_MAC_LANG_CHINESE_SIMPLIFIED =33, - STBTT_MAC_LANG_ITALIAN =3 , STBTT_MAC_LANG_CHINESE_TRAD =19 -}; - -#ifdef __cplusplus -} -#endif - -#endif // __STB_INCLUDE_STB_TRUETYPE_H__ - -/////////////////////////////////////////////////////////////////////////////// -/////////////////////////////////////////////////////////////////////////////// -//// -//// IMPLEMENTATION -//// -//// - -#ifdef STB_TRUETYPE_IMPLEMENTATION - -#ifndef STBTT_MAX_OVERSAMPLE -#define STBTT_MAX_OVERSAMPLE 8 -#endif - -#if STBTT_MAX_OVERSAMPLE > 255 -#error "STBTT_MAX_OVERSAMPLE cannot be > 255" -#endif - -typedef int stbtt__test_oversample_pow2[(STBTT_MAX_OVERSAMPLE & (STBTT_MAX_OVERSAMPLE-1)) == 0 ? 1 : -1]; - -#ifndef STBTT_RASTERIZER_VERSION -#define STBTT_RASTERIZER_VERSION 2 -#endif - -#ifdef _MSC_VER -#define STBTT__NOTUSED(v) (void)(v) -#else -#define STBTT__NOTUSED(v) (void)sizeof(v) -#endif - -////////////////////////////////////////////////////////////////////////// -// -// stbtt__buf helpers to parse data from file -// - -static stbtt_uint8 stbtt__buf_get8(stbtt__buf *b) -{ - if (b->cursor >= b->size) - return 0; - return b->data[b->cursor++]; -} - -static stbtt_uint8 stbtt__buf_peek8(stbtt__buf *b) -{ - if (b->cursor >= b->size) - return 0; - return b->data[b->cursor]; -} - -static void stbtt__buf_seek(stbtt__buf *b, int o) -{ - STBTT_assert(!(o > b->size || o < 0)); - b->cursor = (o > b->size || o < 0) ? b->size : o; -} - -static void stbtt__buf_skip(stbtt__buf *b, int o) -{ - stbtt__buf_seek(b, b->cursor + o); -} - -static stbtt_uint32 stbtt__buf_get(stbtt__buf *b, int n) -{ - stbtt_uint32 v = 0; - int i; - STBTT_assert(n >= 1 && n <= 4); - for (i = 0; i < n; i++) - v = (v << 8) | stbtt__buf_get8(b); - return v; -} - -static stbtt__buf stbtt__new_buf(const void *p, size_t size) -{ - stbtt__buf r; - STBTT_assert(size < 0x40000000); - r.data = (stbtt_uint8*) p; - r.size = (int) size; - r.cursor = 0; - return r; -} - -#define stbtt__buf_get16(b) stbtt__buf_get((b), 2) -#define stbtt__buf_get32(b) stbtt__buf_get((b), 4) - -static stbtt__buf stbtt__buf_range(const stbtt__buf *b, int o, int s) -{ - stbtt__buf r = stbtt__new_buf(NULL, 0); - if (o < 0 || s < 0 || o > b->size || s > b->size - o) return r; - r.data = b->data + o; - r.size = s; - return r; -} - -static stbtt__buf stbtt__cff_get_index(stbtt__buf *b) -{ - int count, start, offsize; - start = b->cursor; - count = stbtt__buf_get16(b); - if (count) { - offsize = stbtt__buf_get8(b); - STBTT_assert(offsize >= 1 && offsize <= 4); - stbtt__buf_skip(b, offsize * count); - stbtt__buf_skip(b, stbtt__buf_get(b, offsize) - 1); - } - return stbtt__buf_range(b, start, b->cursor - start); -} - -static stbtt_uint32 stbtt__cff_int(stbtt__buf *b) -{ - int b0 = stbtt__buf_get8(b); - if (b0 >= 32 && b0 <= 246) return b0 - 139; - else if (b0 >= 247 && b0 <= 250) return (b0 - 247)*256 + stbtt__buf_get8(b) + 108; - else if (b0 >= 251 && b0 <= 254) return -(b0 - 251)*256 - stbtt__buf_get8(b) - 108; - else if (b0 == 28) return stbtt__buf_get16(b); - else if (b0 == 29) return stbtt__buf_get32(b); - STBTT_assert(0); - return 0; -} - -static void stbtt__cff_skip_operand(stbtt__buf *b) { - int v, b0 = stbtt__buf_peek8(b); - STBTT_assert(b0 >= 28); - if (b0 == 30) { - stbtt__buf_skip(b, 1); - while (b->cursor < b->size) { - v = stbtt__buf_get8(b); - if ((v & 0xF) == 0xF || (v >> 4) == 0xF) - break; - } - } else { - stbtt__cff_int(b); - } -} - -static stbtt__buf stbtt__dict_get(stbtt__buf *b, int key) -{ - stbtt__buf_seek(b, 0); - while (b->cursor < b->size) { - int start = b->cursor, end, op; - while (stbtt__buf_peek8(b) >= 28) - stbtt__cff_skip_operand(b); - end = b->cursor; - op = stbtt__buf_get8(b); - if (op == 12) op = stbtt__buf_get8(b) | 0x100; - if (op == key) return stbtt__buf_range(b, start, end-start); - } - return stbtt__buf_range(b, 0, 0); -} - -static void stbtt__dict_get_ints(stbtt__buf *b, int key, int outcount, stbtt_uint32 *out) -{ - int i; - stbtt__buf operands = stbtt__dict_get(b, key); - for (i = 0; i < outcount && operands.cursor < operands.size; i++) - out[i] = stbtt__cff_int(&operands); -} - -static int stbtt__cff_index_count(stbtt__buf *b) -{ - stbtt__buf_seek(b, 0); - return stbtt__buf_get16(b); -} - -static stbtt__buf stbtt__cff_index_get(stbtt__buf b, int i) -{ - int count, offsize, start, end; - stbtt__buf_seek(&b, 0); - count = stbtt__buf_get16(&b); - offsize = stbtt__buf_get8(&b); - STBTT_assert(i >= 0 && i < count); - STBTT_assert(offsize >= 1 && offsize <= 4); - stbtt__buf_skip(&b, i*offsize); - start = stbtt__buf_get(&b, offsize); - end = stbtt__buf_get(&b, offsize); - return stbtt__buf_range(&b, 2+(count+1)*offsize+start, end - start); -} - -////////////////////////////////////////////////////////////////////////// -// -// accessors to parse data from file -// - -// on platforms that don't allow misaligned reads, if we want to allow -// truetype fonts that aren't padded to alignment, define ALLOW_UNALIGNED_TRUETYPE - -#define ttBYTE(p) (* (stbtt_uint8 *) (p)) -#define ttCHAR(p) (* (stbtt_int8 *) (p)) -#define ttFixed(p) ttLONG(p) - -static stbtt_uint16 ttUSHORT(stbtt_uint8 *p) { return p[0]*256 + p[1]; } -static stbtt_int16 ttSHORT(stbtt_uint8 *p) { return p[0]*256 + p[1]; } -static stbtt_uint32 ttULONG(stbtt_uint8 *p) { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; } -static stbtt_int32 ttLONG(stbtt_uint8 *p) { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; } - -#define stbtt_tag4(p,c0,c1,c2,c3) ((p)[0] == (c0) && (p)[1] == (c1) && (p)[2] == (c2) && (p)[3] == (c3)) -#define stbtt_tag(p,str) stbtt_tag4(p,str[0],str[1],str[2],str[3]) - -static int stbtt__isfont(stbtt_uint8 *font) -{ - // check the version number - if (stbtt_tag4(font, '1',0,0,0)) return 1; // TrueType 1 - if (stbtt_tag(font, "typ1")) return 1; // TrueType with type 1 font -- we don't support this! - if (stbtt_tag(font, "OTTO")) return 1; // OpenType with CFF - if (stbtt_tag4(font, 0,1,0,0)) return 1; // OpenType 1.0 - if (stbtt_tag(font, "true")) return 1; // Apple specification for TrueType fonts - return 0; -} - -// @OPTIMIZE: binary search -static stbtt_uint32 stbtt__find_table(stbtt_uint8 *data, stbtt_uint32 fontstart, const char *tag) -{ - stbtt_int32 num_tables = ttUSHORT(data+fontstart+4); - stbtt_uint32 tabledir = fontstart + 12; - stbtt_int32 i; - for (i=0; i < num_tables; ++i) { - stbtt_uint32 loc = tabledir + 16*i; - if (stbtt_tag(data+loc+0, tag)) - return ttULONG(data+loc+8); - } - return 0; -} - -static int stbtt_GetFontOffsetForIndex_internal(unsigned char *font_collection, int index) -{ - // if it's just a font, there's only one valid index - if (stbtt__isfont(font_collection)) - return index == 0 ? 0 : -1; - - // check if it's a TTC - if (stbtt_tag(font_collection, "ttcf")) { - // version 1? - if (ttULONG(font_collection+4) == 0x00010000 || ttULONG(font_collection+4) == 0x00020000) { - stbtt_int32 n = ttLONG(font_collection+8); - if (index >= n) - return -1; - return ttULONG(font_collection+12+index*4); - } - } - return -1; -} - -static int stbtt_GetNumberOfFonts_internal(unsigned char *font_collection) -{ - // if it's just a font, there's only one valid font - if (stbtt__isfont(font_collection)) - return 1; - - // check if it's a TTC - if (stbtt_tag(font_collection, "ttcf")) { - // version 1? - if (ttULONG(font_collection+4) == 0x00010000 || ttULONG(font_collection+4) == 0x00020000) { - return ttLONG(font_collection+8); - } - } - return 0; -} - -static stbtt__buf stbtt__get_subrs(stbtt__buf cff, stbtt__buf fontdict) -{ - stbtt_uint32 subrsoff = 0, private_loc[2] = { 0, 0 }; - stbtt__buf pdict; - stbtt__dict_get_ints(&fontdict, 18, 2, private_loc); - if (!private_loc[1] || !private_loc[0]) return stbtt__new_buf(NULL, 0); - pdict = stbtt__buf_range(&cff, private_loc[1], private_loc[0]); - stbtt__dict_get_ints(&pdict, 19, 1, &subrsoff); - if (!subrsoff) return stbtt__new_buf(NULL, 0); - stbtt__buf_seek(&cff, private_loc[1]+subrsoff); - return stbtt__cff_get_index(&cff); -} - -// since most people won't use this, find this table the first time it's needed -static int stbtt__get_svg(stbtt_fontinfo *info) -{ - stbtt_uint32 t; - if (info->svg < 0) { - t = stbtt__find_table(info->data, info->fontstart, "SVG "); - if (t) { - stbtt_uint32 offset = ttULONG(info->data + t + 2); - info->svg = t + offset; - } else { - info->svg = 0; - } - } - return info->svg; -} - -static int stbtt_InitFont_internal(stbtt_fontinfo *info, unsigned char *data, int fontstart) -{ - stbtt_uint32 cmap, t; - stbtt_int32 i,numTables; - - info->data = data; - info->fontstart = fontstart; - info->cff = stbtt__new_buf(NULL, 0); - - cmap = stbtt__find_table(data, fontstart, "cmap"); // required - info->loca = stbtt__find_table(data, fontstart, "loca"); // required - info->head = stbtt__find_table(data, fontstart, "head"); // required - info->glyf = stbtt__find_table(data, fontstart, "glyf"); // required - info->hhea = stbtt__find_table(data, fontstart, "hhea"); // required - info->hmtx = stbtt__find_table(data, fontstart, "hmtx"); // required - info->kern = stbtt__find_table(data, fontstart, "kern"); // not required - info->gpos = stbtt__find_table(data, fontstart, "GPOS"); // not required - - if (!cmap || !info->head || !info->hhea || !info->hmtx) - return 0; - if (info->glyf) { - // required for truetype - if (!info->loca) return 0; - } else { - // initialization for CFF / Type2 fonts (OTF) - stbtt__buf b, topdict, topdictidx; - stbtt_uint32 cstype = 2, charstrings = 0, fdarrayoff = 0, fdselectoff = 0; - stbtt_uint32 cff; - - cff = stbtt__find_table(data, fontstart, "CFF "); - if (!cff) return 0; - - info->fontdicts = stbtt__new_buf(NULL, 0); - info->fdselect = stbtt__new_buf(NULL, 0); - - // @TODO this should use size from table (not 512MB) - info->cff = stbtt__new_buf(data+cff, 512*1024*1024); - b = info->cff; - - // read the header - stbtt__buf_skip(&b, 2); - stbtt__buf_seek(&b, stbtt__buf_get8(&b)); // hdrsize - - // @TODO the name INDEX could list multiple fonts, - // but we just use the first one. - stbtt__cff_get_index(&b); // name INDEX - topdictidx = stbtt__cff_get_index(&b); - topdict = stbtt__cff_index_get(topdictidx, 0); - stbtt__cff_get_index(&b); // string INDEX - info->gsubrs = stbtt__cff_get_index(&b); - - stbtt__dict_get_ints(&topdict, 17, 1, &charstrings); - stbtt__dict_get_ints(&topdict, 0x100 | 6, 1, &cstype); - stbtt__dict_get_ints(&topdict, 0x100 | 36, 1, &fdarrayoff); - stbtt__dict_get_ints(&topdict, 0x100 | 37, 1, &fdselectoff); - info->subrs = stbtt__get_subrs(b, topdict); - - // we only support Type 2 charstrings - if (cstype != 2) return 0; - if (charstrings == 0) return 0; - - if (fdarrayoff) { - // looks like a CID font - if (!fdselectoff) return 0; - stbtt__buf_seek(&b, fdarrayoff); - info->fontdicts = stbtt__cff_get_index(&b); - info->fdselect = stbtt__buf_range(&b, fdselectoff, b.size-fdselectoff); - } - - stbtt__buf_seek(&b, charstrings); - info->charstrings = stbtt__cff_get_index(&b); - } - - t = stbtt__find_table(data, fontstart, "maxp"); - if (t) - info->numGlyphs = ttUSHORT(data+t+4); - else - info->numGlyphs = 0xffff; - - info->svg = -1; - - // find a cmap encoding table we understand *now* to avoid searching - // later. (todo: could make this installable) - // the same regardless of glyph. - numTables = ttUSHORT(data + cmap + 2); - info->index_map = 0; - for (i=0; i < numTables; ++i) { - stbtt_uint32 encoding_record = cmap + 4 + 8 * i; - // find an encoding we understand: - switch(ttUSHORT(data+encoding_record)) { - case STBTT_PLATFORM_ID_MICROSOFT: - switch (ttUSHORT(data+encoding_record+2)) { - case STBTT_MS_EID_UNICODE_BMP: - case STBTT_MS_EID_UNICODE_FULL: - // MS/Unicode - info->index_map = cmap + ttULONG(data+encoding_record+4); - break; - } - break; - case STBTT_PLATFORM_ID_UNICODE: - // Mac/iOS has these - // all the encodingIDs are unicode, so we don't bother to check it - info->index_map = cmap + ttULONG(data+encoding_record+4); - break; - } - } - if (info->index_map == 0) - return 0; - - info->indexToLocFormat = ttUSHORT(data+info->head + 50); - return 1; -} - -STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint) -{ - stbtt_uint8 *data = info->data; - stbtt_uint32 index_map = info->index_map; - - stbtt_uint16 format = ttUSHORT(data + index_map + 0); - if (format == 0) { // apple byte encoding - stbtt_int32 bytes = ttUSHORT(data + index_map + 2); - if (unicode_codepoint < bytes-6) - return ttBYTE(data + index_map + 6 + unicode_codepoint); - return 0; - } else if (format == 6) { - stbtt_uint32 first = ttUSHORT(data + index_map + 6); - stbtt_uint32 count = ttUSHORT(data + index_map + 8); - if ((stbtt_uint32) unicode_codepoint >= first && (stbtt_uint32) unicode_codepoint < first+count) - return ttUSHORT(data + index_map + 10 + (unicode_codepoint - first)*2); - return 0; - } else if (format == 2) { - STBTT_assert(0); // @TODO: high-byte mapping for japanese/chinese/korean - return 0; - } else if (format == 4) { // standard mapping for windows fonts: binary search collection of ranges - stbtt_uint16 segcount = ttUSHORT(data+index_map+6) >> 1; - stbtt_uint16 searchRange = ttUSHORT(data+index_map+8) >> 1; - stbtt_uint16 entrySelector = ttUSHORT(data+index_map+10); - stbtt_uint16 rangeShift = ttUSHORT(data+index_map+12) >> 1; - - // do a binary search of the segments - stbtt_uint32 endCount = index_map + 14; - stbtt_uint32 search = endCount; - - if (unicode_codepoint > 0xffff) - return 0; - - // they lie from endCount .. endCount + segCount - // but searchRange is the nearest power of two, so... - if (unicode_codepoint >= ttUSHORT(data + search + rangeShift*2)) - search += rangeShift*2; - - // now decrement to bias correctly to find smallest - search -= 2; - while (entrySelector) { - stbtt_uint16 end; - searchRange >>= 1; - end = ttUSHORT(data + search + searchRange*2); - if (unicode_codepoint > end) - search += searchRange*2; - --entrySelector; - } - search += 2; - - { - stbtt_uint16 offset, start, last; - stbtt_uint16 item = (stbtt_uint16) ((search - endCount) >> 1); - - start = ttUSHORT(data + index_map + 14 + segcount*2 + 2 + 2*item); - last = ttUSHORT(data + endCount + 2*item); - if (unicode_codepoint < start || unicode_codepoint > last) - return 0; - - offset = ttUSHORT(data + index_map + 14 + segcount*6 + 2 + 2*item); - if (offset == 0) - return (stbtt_uint16) (unicode_codepoint + ttSHORT(data + index_map + 14 + segcount*4 + 2 + 2*item)); - - return ttUSHORT(data + offset + (unicode_codepoint-start)*2 + index_map + 14 + segcount*6 + 2 + 2*item); - } - } else if (format == 12 || format == 13) { - stbtt_uint32 ngroups = ttULONG(data+index_map+12); - stbtt_int32 low,high; - low = 0; high = (stbtt_int32)ngroups; - // Binary search the right group. - while (low < high) { - stbtt_int32 mid = low + ((high-low) >> 1); // rounds down, so low <= mid < high - stbtt_uint32 start_char = ttULONG(data+index_map+16+mid*12); - stbtt_uint32 end_char = ttULONG(data+index_map+16+mid*12+4); - if ((stbtt_uint32) unicode_codepoint < start_char) - high = mid; - else if ((stbtt_uint32) unicode_codepoint > end_char) - low = mid+1; - else { - stbtt_uint32 start_glyph = ttULONG(data+index_map+16+mid*12+8); - if (format == 12) - return start_glyph + unicode_codepoint-start_char; - else // format == 13 - return start_glyph; - } - } - return 0; // not found - } - // @TODO - STBTT_assert(0); - return 0; -} - -STBTT_DEF int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices) -{ - return stbtt_GetGlyphShape(info, stbtt_FindGlyphIndex(info, unicode_codepoint), vertices); -} - -static void stbtt_setvertex(stbtt_vertex *v, stbtt_uint8 type, stbtt_int32 x, stbtt_int32 y, stbtt_int32 cx, stbtt_int32 cy) -{ - v->type = type; - v->x = (stbtt_int16) x; - v->y = (stbtt_int16) y; - v->cx = (stbtt_int16) cx; - v->cy = (stbtt_int16) cy; -} - -static int stbtt__GetGlyfOffset(const stbtt_fontinfo *info, int glyph_index) -{ - int g1,g2; - - STBTT_assert(!info->cff.size); - - if (glyph_index >= info->numGlyphs) return -1; // glyph index out of range - if (info->indexToLocFormat >= 2) return -1; // unknown index->glyph map format - - if (info->indexToLocFormat == 0) { - g1 = info->glyf + ttUSHORT(info->data + info->loca + glyph_index * 2) * 2; - g2 = info->glyf + ttUSHORT(info->data + info->loca + glyph_index * 2 + 2) * 2; - } else { - g1 = info->glyf + ttULONG (info->data + info->loca + glyph_index * 4); - g2 = info->glyf + ttULONG (info->data + info->loca + glyph_index * 4 + 4); - } - - return g1==g2 ? -1 : g1; // if length is 0, return -1 -} - -static int stbtt__GetGlyphInfoT2(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1); - -STBTT_DEF int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1) -{ - if (info->cff.size) { - stbtt__GetGlyphInfoT2(info, glyph_index, x0, y0, x1, y1); - } else { - int g = stbtt__GetGlyfOffset(info, glyph_index); - if (g < 0) return 0; - - if (x0) *x0 = ttSHORT(info->data + g + 2); - if (y0) *y0 = ttSHORT(info->data + g + 4); - if (x1) *x1 = ttSHORT(info->data + g + 6); - if (y1) *y1 = ttSHORT(info->data + g + 8); - } - return 1; -} - -STBTT_DEF int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1) -{ - return stbtt_GetGlyphBox(info, stbtt_FindGlyphIndex(info,codepoint), x0,y0,x1,y1); -} - -STBTT_DEF int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index) -{ - stbtt_int16 numberOfContours; - int g; - if (info->cff.size) - return stbtt__GetGlyphInfoT2(info, glyph_index, NULL, NULL, NULL, NULL) == 0; - g = stbtt__GetGlyfOffset(info, glyph_index); - if (g < 0) return 1; - numberOfContours = ttSHORT(info->data + g); - return numberOfContours == 0; -} - -static int stbtt__close_shape(stbtt_vertex *vertices, int num_vertices, int was_off, int start_off, - stbtt_int32 sx, stbtt_int32 sy, stbtt_int32 scx, stbtt_int32 scy, stbtt_int32 cx, stbtt_int32 cy) -{ - if (start_off) { - if (was_off) - stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, (cx+scx)>>1, (cy+scy)>>1, cx,cy); - stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, sx,sy,scx,scy); - } else { - if (was_off) - stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve,sx,sy,cx,cy); - else - stbtt_setvertex(&vertices[num_vertices++], STBTT_vline,sx,sy,0,0); - } - return num_vertices; -} - -static int stbtt__GetGlyphShapeTT(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices) -{ - stbtt_int16 numberOfContours; - stbtt_uint8 *endPtsOfContours; - stbtt_uint8 *data = info->data; - stbtt_vertex *vertices=0; - int num_vertices=0; - int g = stbtt__GetGlyfOffset(info, glyph_index); - - *pvertices = NULL; - - if (g < 0) return 0; - - numberOfContours = ttSHORT(data + g); - - if (numberOfContours > 0) { - stbtt_uint8 flags=0,flagcount; - stbtt_int32 ins, i,j=0,m,n, next_move, was_off=0, off, start_off=0; - stbtt_int32 x,y,cx,cy,sx,sy, scx,scy; - stbtt_uint8 *points; - endPtsOfContours = (data + g + 10); - ins = ttUSHORT(data + g + 10 + numberOfContours * 2); - points = data + g + 10 + numberOfContours * 2 + 2 + ins; - - n = 1+ttUSHORT(endPtsOfContours + numberOfContours*2-2); - - m = n + 2*numberOfContours; // a loose bound on how many vertices we might need - vertices = (stbtt_vertex *) STBTT_malloc(m * sizeof(vertices[0]), info->userdata); - if (vertices == 0) - return 0; - - next_move = 0; - flagcount=0; - - // in first pass, we load uninterpreted data into the allocated array - // above, shifted to the end of the array so we won't overwrite it when - // we create our final data starting from the front - - off = m - n; // starting offset for uninterpreted data, regardless of how m ends up being calculated - - // first load flags - - for (i=0; i < n; ++i) { - if (flagcount == 0) { - flags = *points++; - if (flags & 8) - flagcount = *points++; - } else - --flagcount; - vertices[off+i].type = flags; - } - - // now load x coordinates - x=0; - for (i=0; i < n; ++i) { - flags = vertices[off+i].type; - if (flags & 2) { - stbtt_int16 dx = *points++; - x += (flags & 16) ? dx : -dx; // ??? - } else { - if (!(flags & 16)) { - x = x + (stbtt_int16) (points[0]*256 + points[1]); - points += 2; - } - } - vertices[off+i].x = (stbtt_int16) x; - } - - // now load y coordinates - y=0; - for (i=0; i < n; ++i) { - flags = vertices[off+i].type; - if (flags & 4) { - stbtt_int16 dy = *points++; - y += (flags & 32) ? dy : -dy; // ??? - } else { - if (!(flags & 32)) { - y = y + (stbtt_int16) (points[0]*256 + points[1]); - points += 2; - } - } - vertices[off+i].y = (stbtt_int16) y; - } - - // now convert them to our format - num_vertices=0; - sx = sy = cx = cy = scx = scy = 0; - for (i=0; i < n; ++i) { - flags = vertices[off+i].type; - x = (stbtt_int16) vertices[off+i].x; - y = (stbtt_int16) vertices[off+i].y; - - if (next_move == i) { - if (i != 0) - num_vertices = stbtt__close_shape(vertices, num_vertices, was_off, start_off, sx,sy,scx,scy,cx,cy); - - // now start the new one - start_off = !(flags & 1); - if (start_off) { - // if we start off with an off-curve point, then when we need to find a point on the curve - // where we can start, and we need to save some state for when we wraparound. - scx = x; - scy = y; - if (!(vertices[off+i+1].type & 1)) { - // next point is also a curve point, so interpolate an on-point curve - sx = (x + (stbtt_int32) vertices[off+i+1].x) >> 1; - sy = (y + (stbtt_int32) vertices[off+i+1].y) >> 1; - } else { - // otherwise just use the next point as our start point - sx = (stbtt_int32) vertices[off+i+1].x; - sy = (stbtt_int32) vertices[off+i+1].y; - ++i; // we're using point i+1 as the starting point, so skip it - } - } else { - sx = x; - sy = y; - } - stbtt_setvertex(&vertices[num_vertices++], STBTT_vmove,sx,sy,0,0); - was_off = 0; - next_move = 1 + ttUSHORT(endPtsOfContours+j*2); - ++j; - } else { - if (!(flags & 1)) { // if it's a curve - if (was_off) // two off-curve control points in a row means interpolate an on-curve midpoint - stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, (cx+x)>>1, (cy+y)>>1, cx, cy); - cx = x; - cy = y; - was_off = 1; - } else { - if (was_off) - stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, x,y, cx, cy); - else - stbtt_setvertex(&vertices[num_vertices++], STBTT_vline, x,y,0,0); - was_off = 0; - } - } - } - num_vertices = stbtt__close_shape(vertices, num_vertices, was_off, start_off, sx,sy,scx,scy,cx,cy); - } else if (numberOfContours < 0) { - // Compound shapes. - int more = 1; - stbtt_uint8 *comp = data + g + 10; - num_vertices = 0; - vertices = 0; - while (more) { - stbtt_uint16 flags, gidx; - int comp_num_verts = 0, i; - stbtt_vertex *comp_verts = 0, *tmp = 0; - float mtx[6] = {1,0,0,1,0,0}, m, n; - - flags = ttSHORT(comp); comp+=2; - gidx = ttSHORT(comp); comp+=2; - - if (flags & 2) { // XY values - if (flags & 1) { // shorts - mtx[4] = ttSHORT(comp); comp+=2; - mtx[5] = ttSHORT(comp); comp+=2; - } else { - mtx[4] = ttCHAR(comp); comp+=1; - mtx[5] = ttCHAR(comp); comp+=1; - } - } - else { - // @TODO handle matching point - STBTT_assert(0); - } - if (flags & (1<<3)) { // WE_HAVE_A_SCALE - mtx[0] = mtx[3] = ttSHORT(comp)/16384.0f; comp+=2; - mtx[1] = mtx[2] = 0; - } else if (flags & (1<<6)) { // WE_HAVE_AN_X_AND_YSCALE - mtx[0] = ttSHORT(comp)/16384.0f; comp+=2; - mtx[1] = mtx[2] = 0; - mtx[3] = ttSHORT(comp)/16384.0f; comp+=2; - } else if (flags & (1<<7)) { // WE_HAVE_A_TWO_BY_TWO - mtx[0] = ttSHORT(comp)/16384.0f; comp+=2; - mtx[1] = ttSHORT(comp)/16384.0f; comp+=2; - mtx[2] = ttSHORT(comp)/16384.0f; comp+=2; - mtx[3] = ttSHORT(comp)/16384.0f; comp+=2; - } - - // Find transformation scales. - m = (float) STBTT_sqrt(mtx[0]*mtx[0] + mtx[1]*mtx[1]); - n = (float) STBTT_sqrt(mtx[2]*mtx[2] + mtx[3]*mtx[3]); - - // Get indexed glyph. - comp_num_verts = stbtt_GetGlyphShape(info, gidx, &comp_verts); - if (comp_num_verts > 0) { - // Transform vertices. - for (i = 0; i < comp_num_verts; ++i) { - stbtt_vertex* v = &comp_verts[i]; - stbtt_vertex_type x,y; - x=v->x; y=v->y; - v->x = (stbtt_vertex_type)(m * (mtx[0]*x + mtx[2]*y + mtx[4])); - v->y = (stbtt_vertex_type)(n * (mtx[1]*x + mtx[3]*y + mtx[5])); - x=v->cx; y=v->cy; - v->cx = (stbtt_vertex_type)(m * (mtx[0]*x + mtx[2]*y + mtx[4])); - v->cy = (stbtt_vertex_type)(n * (mtx[1]*x + mtx[3]*y + mtx[5])); - } - // Append vertices. - tmp = (stbtt_vertex*)STBTT_malloc((num_vertices+comp_num_verts)*sizeof(stbtt_vertex), info->userdata); - if (!tmp) { - if (vertices) STBTT_free(vertices, info->userdata); - if (comp_verts) STBTT_free(comp_verts, info->userdata); - return 0; - } - if (num_vertices > 0 && vertices) STBTT_memcpy(tmp, vertices, num_vertices*sizeof(stbtt_vertex)); - STBTT_memcpy(tmp+num_vertices, comp_verts, comp_num_verts*sizeof(stbtt_vertex)); - if (vertices) STBTT_free(vertices, info->userdata); - vertices = tmp; - STBTT_free(comp_verts, info->userdata); - num_vertices += comp_num_verts; - } - // More components ? - more = flags & (1<<5); - } - } else { - // numberOfCounters == 0, do nothing - } - - *pvertices = vertices; - return num_vertices; -} - -typedef struct -{ - int bounds; - int started; - float first_x, first_y; - float x, y; - stbtt_int32 min_x, max_x, min_y, max_y; - - stbtt_vertex *pvertices; - int num_vertices; -} stbtt__csctx; - -#define STBTT__CSCTX_INIT(bounds) {bounds,0, 0,0, 0,0, 0,0,0,0, NULL, 0} - -static void stbtt__track_vertex(stbtt__csctx *c, stbtt_int32 x, stbtt_int32 y) -{ - if (x > c->max_x || !c->started) c->max_x = x; - if (y > c->max_y || !c->started) c->max_y = y; - if (x < c->min_x || !c->started) c->min_x = x; - if (y < c->min_y || !c->started) c->min_y = y; - c->started = 1; -} - -static void stbtt__csctx_v(stbtt__csctx *c, stbtt_uint8 type, stbtt_int32 x, stbtt_int32 y, stbtt_int32 cx, stbtt_int32 cy, stbtt_int32 cx1, stbtt_int32 cy1) -{ - if (c->bounds) { - stbtt__track_vertex(c, x, y); - if (type == STBTT_vcubic) { - stbtt__track_vertex(c, cx, cy); - stbtt__track_vertex(c, cx1, cy1); - } - } else { - stbtt_setvertex(&c->pvertices[c->num_vertices], type, x, y, cx, cy); - c->pvertices[c->num_vertices].cx1 = (stbtt_int16) cx1; - c->pvertices[c->num_vertices].cy1 = (stbtt_int16) cy1; - } - c->num_vertices++; -} - -static void stbtt__csctx_close_shape(stbtt__csctx *ctx) -{ - if (ctx->first_x != ctx->x || ctx->first_y != ctx->y) - stbtt__csctx_v(ctx, STBTT_vline, (int)ctx->first_x, (int)ctx->first_y, 0, 0, 0, 0); -} - -static void stbtt__csctx_rmove_to(stbtt__csctx *ctx, float dx, float dy) -{ - stbtt__csctx_close_shape(ctx); - ctx->first_x = ctx->x = ctx->x + dx; - ctx->first_y = ctx->y = ctx->y + dy; - stbtt__csctx_v(ctx, STBTT_vmove, (int)ctx->x, (int)ctx->y, 0, 0, 0, 0); -} - -static void stbtt__csctx_rline_to(stbtt__csctx *ctx, float dx, float dy) -{ - ctx->x += dx; - ctx->y += dy; - stbtt__csctx_v(ctx, STBTT_vline, (int)ctx->x, (int)ctx->y, 0, 0, 0, 0); -} - -static void stbtt__csctx_rccurve_to(stbtt__csctx *ctx, float dx1, float dy1, float dx2, float dy2, float dx3, float dy3) -{ - float cx1 = ctx->x + dx1; - float cy1 = ctx->y + dy1; - float cx2 = cx1 + dx2; - float cy2 = cy1 + dy2; - ctx->x = cx2 + dx3; - ctx->y = cy2 + dy3; - stbtt__csctx_v(ctx, STBTT_vcubic, (int)ctx->x, (int)ctx->y, (int)cx1, (int)cy1, (int)cx2, (int)cy2); -} - -static stbtt__buf stbtt__get_subr(stbtt__buf idx, int n) -{ - int count = stbtt__cff_index_count(&idx); - int bias = 107; - if (count >= 33900) - bias = 32768; - else if (count >= 1240) - bias = 1131; - n += bias; - if (n < 0 || n >= count) - return stbtt__new_buf(NULL, 0); - return stbtt__cff_index_get(idx, n); -} - -static stbtt__buf stbtt__cid_get_glyph_subrs(const stbtt_fontinfo *info, int glyph_index) -{ - stbtt__buf fdselect = info->fdselect; - int nranges, start, end, v, fmt, fdselector = -1, i; - - stbtt__buf_seek(&fdselect, 0); - fmt = stbtt__buf_get8(&fdselect); - if (fmt == 0) { - // untested - stbtt__buf_skip(&fdselect, glyph_index); - fdselector = stbtt__buf_get8(&fdselect); - } else if (fmt == 3) { - nranges = stbtt__buf_get16(&fdselect); - start = stbtt__buf_get16(&fdselect); - for (i = 0; i < nranges; i++) { - v = stbtt__buf_get8(&fdselect); - end = stbtt__buf_get16(&fdselect); - if (glyph_index >= start && glyph_index < end) { - fdselector = v; - break; - } - start = end; - } - } - if (fdselector == -1) stbtt__new_buf(NULL, 0); - return stbtt__get_subrs(info->cff, stbtt__cff_index_get(info->fontdicts, fdselector)); -} - -static int stbtt__run_charstring(const stbtt_fontinfo *info, int glyph_index, stbtt__csctx *c) -{ - int in_header = 1, maskbits = 0, subr_stack_height = 0, sp = 0, v, i, b0; - int has_subrs = 0, clear_stack; - float s[48]; - stbtt__buf subr_stack[10], subrs = info->subrs, b; - float f; - -#define STBTT__CSERR(s) (0) - - // this currently ignores the initial width value, which isn't needed if we have hmtx - b = stbtt__cff_index_get(info->charstrings, glyph_index); - while (b.cursor < b.size) { - i = 0; - clear_stack = 1; - b0 = stbtt__buf_get8(&b); - switch (b0) { - // @TODO implement hinting - case 0x13: // hintmask - case 0x14: // cntrmask - if (in_header) - maskbits += (sp / 2); // implicit "vstem" - in_header = 0; - stbtt__buf_skip(&b, (maskbits + 7) / 8); - break; - - case 0x01: // hstem - case 0x03: // vstem - case 0x12: // hstemhm - case 0x17: // vstemhm - maskbits += (sp / 2); - break; - - case 0x15: // rmoveto - in_header = 0; - if (sp < 2) return STBTT__CSERR("rmoveto stack"); - stbtt__csctx_rmove_to(c, s[sp-2], s[sp-1]); - break; - case 0x04: // vmoveto - in_header = 0; - if (sp < 1) return STBTT__CSERR("vmoveto stack"); - stbtt__csctx_rmove_to(c, 0, s[sp-1]); - break; - case 0x16: // hmoveto - in_header = 0; - if (sp < 1) return STBTT__CSERR("hmoveto stack"); - stbtt__csctx_rmove_to(c, s[sp-1], 0); - break; - - case 0x05: // rlineto - if (sp < 2) return STBTT__CSERR("rlineto stack"); - for (; i + 1 < sp; i += 2) - stbtt__csctx_rline_to(c, s[i], s[i+1]); - break; - - // hlineto/vlineto and vhcurveto/hvcurveto alternate horizontal and vertical - // starting from a different place. - - case 0x07: // vlineto - if (sp < 1) return STBTT__CSERR("vlineto stack"); - goto vlineto; - case 0x06: // hlineto - if (sp < 1) return STBTT__CSERR("hlineto stack"); - for (;;) { - if (i >= sp) break; - stbtt__csctx_rline_to(c, s[i], 0); - i++; - vlineto: - if (i >= sp) break; - stbtt__csctx_rline_to(c, 0, s[i]); - i++; - } - break; - - case 0x1F: // hvcurveto - if (sp < 4) return STBTT__CSERR("hvcurveto stack"); - goto hvcurveto; - case 0x1E: // vhcurveto - if (sp < 4) return STBTT__CSERR("vhcurveto stack"); - for (;;) { - if (i + 3 >= sp) break; - stbtt__csctx_rccurve_to(c, 0, s[i], s[i+1], s[i+2], s[i+3], (sp - i == 5) ? s[i + 4] : 0.0f); - i += 4; - hvcurveto: - if (i + 3 >= sp) break; - stbtt__csctx_rccurve_to(c, s[i], 0, s[i+1], s[i+2], (sp - i == 5) ? s[i+4] : 0.0f, s[i+3]); - i += 4; - } - break; - - case 0x08: // rrcurveto - if (sp < 6) return STBTT__CSERR("rcurveline stack"); - for (; i + 5 < sp; i += 6) - stbtt__csctx_rccurve_to(c, s[i], s[i+1], s[i+2], s[i+3], s[i+4], s[i+5]); - break; - - case 0x18: // rcurveline - if (sp < 8) return STBTT__CSERR("rcurveline stack"); - for (; i + 5 < sp - 2; i += 6) - stbtt__csctx_rccurve_to(c, s[i], s[i+1], s[i+2], s[i+3], s[i+4], s[i+5]); - if (i + 1 >= sp) return STBTT__CSERR("rcurveline stack"); - stbtt__csctx_rline_to(c, s[i], s[i+1]); - break; - - case 0x19: // rlinecurve - if (sp < 8) return STBTT__CSERR("rlinecurve stack"); - for (; i + 1 < sp - 6; i += 2) - stbtt__csctx_rline_to(c, s[i], s[i+1]); - if (i + 5 >= sp) return STBTT__CSERR("rlinecurve stack"); - stbtt__csctx_rccurve_to(c, s[i], s[i+1], s[i+2], s[i+3], s[i+4], s[i+5]); - break; - - case 0x1A: // vvcurveto - case 0x1B: // hhcurveto - if (sp < 4) return STBTT__CSERR("(vv|hh)curveto stack"); - f = 0.0; - if (sp & 1) { f = s[i]; i++; } - for (; i + 3 < sp; i += 4) { - if (b0 == 0x1B) - stbtt__csctx_rccurve_to(c, s[i], f, s[i+1], s[i+2], s[i+3], 0.0); - else - stbtt__csctx_rccurve_to(c, f, s[i], s[i+1], s[i+2], 0.0, s[i+3]); - f = 0.0; - } - break; - - case 0x0A: // callsubr - if (!has_subrs) { - if (info->fdselect.size) - subrs = stbtt__cid_get_glyph_subrs(info, glyph_index); - has_subrs = 1; - } - // FALLTHROUGH - case 0x1D: // callgsubr - if (sp < 1) return STBTT__CSERR("call(g|)subr stack"); - v = (int) s[--sp]; - if (subr_stack_height >= 10) return STBTT__CSERR("recursion limit"); - subr_stack[subr_stack_height++] = b; - b = stbtt__get_subr(b0 == 0x0A ? subrs : info->gsubrs, v); - if (b.size == 0) return STBTT__CSERR("subr not found"); - b.cursor = 0; - clear_stack = 0; - break; - - case 0x0B: // return - if (subr_stack_height <= 0) return STBTT__CSERR("return outside subr"); - b = subr_stack[--subr_stack_height]; - clear_stack = 0; - break; - - case 0x0E: // endchar - stbtt__csctx_close_shape(c); - return 1; - - case 0x0C: { // two-byte escape - float dx1, dx2, dx3, dx4, dx5, dx6, dy1, dy2, dy3, dy4, dy5, dy6; - float dx, dy; - int b1 = stbtt__buf_get8(&b); - switch (b1) { - // @TODO These "flex" implementations ignore the flex-depth and resolution, - // and always draw beziers. - case 0x22: // hflex - if (sp < 7) return STBTT__CSERR("hflex stack"); - dx1 = s[0]; - dx2 = s[1]; - dy2 = s[2]; - dx3 = s[3]; - dx4 = s[4]; - dx5 = s[5]; - dx6 = s[6]; - stbtt__csctx_rccurve_to(c, dx1, 0, dx2, dy2, dx3, 0); - stbtt__csctx_rccurve_to(c, dx4, 0, dx5, -dy2, dx6, 0); - break; - - case 0x23: // flex - if (sp < 13) return STBTT__CSERR("flex stack"); - dx1 = s[0]; - dy1 = s[1]; - dx2 = s[2]; - dy2 = s[3]; - dx3 = s[4]; - dy3 = s[5]; - dx4 = s[6]; - dy4 = s[7]; - dx5 = s[8]; - dy5 = s[9]; - dx6 = s[10]; - dy6 = s[11]; - //fd is s[12] - stbtt__csctx_rccurve_to(c, dx1, dy1, dx2, dy2, dx3, dy3); - stbtt__csctx_rccurve_to(c, dx4, dy4, dx5, dy5, dx6, dy6); - break; - - case 0x24: // hflex1 - if (sp < 9) return STBTT__CSERR("hflex1 stack"); - dx1 = s[0]; - dy1 = s[1]; - dx2 = s[2]; - dy2 = s[3]; - dx3 = s[4]; - dx4 = s[5]; - dx5 = s[6]; - dy5 = s[7]; - dx6 = s[8]; - stbtt__csctx_rccurve_to(c, dx1, dy1, dx2, dy2, dx3, 0); - stbtt__csctx_rccurve_to(c, dx4, 0, dx5, dy5, dx6, -(dy1+dy2+dy5)); - break; - - case 0x25: // flex1 - if (sp < 11) return STBTT__CSERR("flex1 stack"); - dx1 = s[0]; - dy1 = s[1]; - dx2 = s[2]; - dy2 = s[3]; - dx3 = s[4]; - dy3 = s[5]; - dx4 = s[6]; - dy4 = s[7]; - dx5 = s[8]; - dy5 = s[9]; - dx6 = dy6 = s[10]; - dx = dx1+dx2+dx3+dx4+dx5; - dy = dy1+dy2+dy3+dy4+dy5; - if (STBTT_fabs(dx) > STBTT_fabs(dy)) - dy6 = -dy; - else - dx6 = -dx; - stbtt__csctx_rccurve_to(c, dx1, dy1, dx2, dy2, dx3, dy3); - stbtt__csctx_rccurve_to(c, dx4, dy4, dx5, dy5, dx6, dy6); - break; - - default: - return STBTT__CSERR("unimplemented"); - } - } break; - - default: - if (b0 != 255 && b0 != 28 && b0 < 32) - return STBTT__CSERR("reserved operator"); - - // push immediate - if (b0 == 255) { - f = (float)(stbtt_int32)stbtt__buf_get32(&b) / 0x10000; - } else { - stbtt__buf_skip(&b, -1); - f = (float)(stbtt_int16)stbtt__cff_int(&b); - } - if (sp >= 48) return STBTT__CSERR("push stack overflow"); - s[sp++] = f; - clear_stack = 0; - break; - } - if (clear_stack) sp = 0; - } - return STBTT__CSERR("no endchar"); - -#undef STBTT__CSERR -} - -static int stbtt__GetGlyphShapeT2(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices) -{ - // runs the charstring twice, once to count and once to output (to avoid realloc) - stbtt__csctx count_ctx = STBTT__CSCTX_INIT(1); - stbtt__csctx output_ctx = STBTT__CSCTX_INIT(0); - if (stbtt__run_charstring(info, glyph_index, &count_ctx)) { - *pvertices = (stbtt_vertex*)STBTT_malloc(count_ctx.num_vertices*sizeof(stbtt_vertex), info->userdata); - output_ctx.pvertices = *pvertices; - if (stbtt__run_charstring(info, glyph_index, &output_ctx)) { - STBTT_assert(output_ctx.num_vertices == count_ctx.num_vertices); - return output_ctx.num_vertices; - } - } - *pvertices = NULL; - return 0; -} - -static int stbtt__GetGlyphInfoT2(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1) -{ - stbtt__csctx c = STBTT__CSCTX_INIT(1); - int r = stbtt__run_charstring(info, glyph_index, &c); - if (x0) *x0 = r ? c.min_x : 0; - if (y0) *y0 = r ? c.min_y : 0; - if (x1) *x1 = r ? c.max_x : 0; - if (y1) *y1 = r ? c.max_y : 0; - return r ? c.num_vertices : 0; -} - -STBTT_DEF int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices) -{ - if (!info->cff.size) - return stbtt__GetGlyphShapeTT(info, glyph_index, pvertices); - else - return stbtt__GetGlyphShapeT2(info, glyph_index, pvertices); -} - -STBTT_DEF void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing) -{ - stbtt_uint16 numOfLongHorMetrics = ttUSHORT(info->data+info->hhea + 34); - if (glyph_index < numOfLongHorMetrics) { - if (advanceWidth) *advanceWidth = ttSHORT(info->data + info->hmtx + 4*glyph_index); - if (leftSideBearing) *leftSideBearing = ttSHORT(info->data + info->hmtx + 4*glyph_index + 2); - } else { - if (advanceWidth) *advanceWidth = ttSHORT(info->data + info->hmtx + 4*(numOfLongHorMetrics-1)); - if (leftSideBearing) *leftSideBearing = ttSHORT(info->data + info->hmtx + 4*numOfLongHorMetrics + 2*(glyph_index - numOfLongHorMetrics)); - } -} - -STBTT_DEF int stbtt_GetKerningTableLength(const stbtt_fontinfo *info) -{ - stbtt_uint8 *data = info->data + info->kern; - - // we only look at the first table. it must be 'horizontal' and format 0. - if (!info->kern) - return 0; - if (ttUSHORT(data+2) < 1) // number of tables, need at least 1 - return 0; - if (ttUSHORT(data+8) != 1) // horizontal flag must be set in format - return 0; - - return ttUSHORT(data+10); -} - -STBTT_DEF int stbtt_GetKerningTable(const stbtt_fontinfo *info, stbtt_kerningentry* table, int table_length) -{ - stbtt_uint8 *data = info->data + info->kern; - int k, length; - - // we only look at the first table. it must be 'horizontal' and format 0. - if (!info->kern) - return 0; - if (ttUSHORT(data+2) < 1) // number of tables, need at least 1 - return 0; - if (ttUSHORT(data+8) != 1) // horizontal flag must be set in format - return 0; - - length = ttUSHORT(data+10); - if (table_length < length) - length = table_length; - - for (k = 0; k < length; k++) - { - table[k].glyph1 = ttUSHORT(data+18+(k*6)); - table[k].glyph2 = ttUSHORT(data+20+(k*6)); - table[k].advance = ttSHORT(data+22+(k*6)); - } - - return length; -} - -static int stbtt__GetGlyphKernInfoAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2) -{ - stbtt_uint8 *data = info->data + info->kern; - stbtt_uint32 needle, straw; - int l, r, m; - - // we only look at the first table. it must be 'horizontal' and format 0. - if (!info->kern) - return 0; - if (ttUSHORT(data+2) < 1) // number of tables, need at least 1 - return 0; - if (ttUSHORT(data+8) != 1) // horizontal flag must be set in format - return 0; - - l = 0; - r = ttUSHORT(data+10) - 1; - needle = glyph1 << 16 | glyph2; - while (l <= r) { - m = (l + r) >> 1; - straw = ttULONG(data+18+(m*6)); // note: unaligned read - if (needle < straw) - r = m - 1; - else if (needle > straw) - l = m + 1; - else - return ttSHORT(data+22+(m*6)); - } - return 0; -} - -static stbtt_int32 stbtt__GetCoverageIndex(stbtt_uint8 *coverageTable, int glyph) -{ - stbtt_uint16 coverageFormat = ttUSHORT(coverageTable); - switch (coverageFormat) { - case 1: { - stbtt_uint16 glyphCount = ttUSHORT(coverageTable + 2); - - // Binary search. - stbtt_int32 l=0, r=glyphCount-1, m; - int straw, needle=glyph; - while (l <= r) { - stbtt_uint8 *glyphArray = coverageTable + 4; - stbtt_uint16 glyphID; - m = (l + r) >> 1; - glyphID = ttUSHORT(glyphArray + 2 * m); - straw = glyphID; - if (needle < straw) - r = m - 1; - else if (needle > straw) - l = m + 1; - else { - return m; - } - } - break; - } - - case 2: { - stbtt_uint16 rangeCount = ttUSHORT(coverageTable + 2); - stbtt_uint8 *rangeArray = coverageTable + 4; - - // Binary search. - stbtt_int32 l=0, r=rangeCount-1, m; - int strawStart, strawEnd, needle=glyph; - while (l <= r) { - stbtt_uint8 *rangeRecord; - m = (l + r) >> 1; - rangeRecord = rangeArray + 6 * m; - strawStart = ttUSHORT(rangeRecord); - strawEnd = ttUSHORT(rangeRecord + 2); - if (needle < strawStart) - r = m - 1; - else if (needle > strawEnd) - l = m + 1; - else { - stbtt_uint16 startCoverageIndex = ttUSHORT(rangeRecord + 4); - return startCoverageIndex + glyph - strawStart; - } - } - break; - } - - default: return -1; // unsupported - } - - return -1; -} - -static stbtt_int32 stbtt__GetGlyphClass(stbtt_uint8 *classDefTable, int glyph) -{ - stbtt_uint16 classDefFormat = ttUSHORT(classDefTable); - switch (classDefFormat) - { - case 1: { - stbtt_uint16 startGlyphID = ttUSHORT(classDefTable + 2); - stbtt_uint16 glyphCount = ttUSHORT(classDefTable + 4); - stbtt_uint8 *classDef1ValueArray = classDefTable + 6; - - if (glyph >= startGlyphID && glyph < startGlyphID + glyphCount) - return (stbtt_int32)ttUSHORT(classDef1ValueArray + 2 * (glyph - startGlyphID)); - break; - } - - case 2: { - stbtt_uint16 classRangeCount = ttUSHORT(classDefTable + 2); - stbtt_uint8 *classRangeRecords = classDefTable + 4; - - // Binary search. - stbtt_int32 l=0, r=classRangeCount-1, m; - int strawStart, strawEnd, needle=glyph; - while (l <= r) { - stbtt_uint8 *classRangeRecord; - m = (l + r) >> 1; - classRangeRecord = classRangeRecords + 6 * m; - strawStart = ttUSHORT(classRangeRecord); - strawEnd = ttUSHORT(classRangeRecord + 2); - if (needle < strawStart) - r = m - 1; - else if (needle > strawEnd) - l = m + 1; - else - return (stbtt_int32)ttUSHORT(classRangeRecord + 4); - } - break; - } - - default: - return -1; // Unsupported definition type, return an error. - } - - // "All glyphs not assigned to a class fall into class 0". (OpenType spec) - return 0; -} - -// Define to STBTT_assert(x) if you want to break on unimplemented formats. -#define STBTT_GPOS_TODO_assert(x) - -static stbtt_int32 stbtt__GetGlyphGPOSInfoAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2) -{ - stbtt_uint16 lookupListOffset; - stbtt_uint8 *lookupList; - stbtt_uint16 lookupCount; - stbtt_uint8 *data; - stbtt_int32 i, sti; - - if (!info->gpos) return 0; - - data = info->data + info->gpos; - - if (ttUSHORT(data+0) != 1) return 0; // Major version 1 - if (ttUSHORT(data+2) != 0) return 0; // Minor version 0 - - lookupListOffset = ttUSHORT(data+8); - lookupList = data + lookupListOffset; - lookupCount = ttUSHORT(lookupList); - - for (i=0; i= pairSetCount) return 0; - - needle=glyph2; - r=pairValueCount-1; - l=0; - - // Binary search. - while (l <= r) { - stbtt_uint16 secondGlyph; - stbtt_uint8 *pairValue; - m = (l + r) >> 1; - pairValue = pairValueArray + (2 + valueRecordPairSizeInBytes) * m; - secondGlyph = ttUSHORT(pairValue); - straw = secondGlyph; - if (needle < straw) - r = m - 1; - else if (needle > straw) - l = m + 1; - else { - stbtt_int16 xAdvance = ttSHORT(pairValue + 2); - return xAdvance; - } - } - } else - return 0; - break; - } - - case 2: { - stbtt_uint16 valueFormat1 = ttUSHORT(table + 4); - stbtt_uint16 valueFormat2 = ttUSHORT(table + 6); - if (valueFormat1 == 4 && valueFormat2 == 0) { // Support more formats? - stbtt_uint16 classDef1Offset = ttUSHORT(table + 8); - stbtt_uint16 classDef2Offset = ttUSHORT(table + 10); - int glyph1class = stbtt__GetGlyphClass(table + classDef1Offset, glyph1); - int glyph2class = stbtt__GetGlyphClass(table + classDef2Offset, glyph2); - - stbtt_uint16 class1Count = ttUSHORT(table + 12); - stbtt_uint16 class2Count = ttUSHORT(table + 14); - stbtt_uint8 *class1Records, *class2Records; - stbtt_int16 xAdvance; - - if (glyph1class < 0 || glyph1class >= class1Count) return 0; // malformed - if (glyph2class < 0 || glyph2class >= class2Count) return 0; // malformed - - class1Records = table + 16; - class2Records = class1Records + 2 * (glyph1class * class2Count); - xAdvance = ttSHORT(class2Records + 2 * glyph2class); - return xAdvance; - } else - return 0; - break; - } - - default: - return 0; // Unsupported position format - } - } - } - - return 0; -} - -STBTT_DEF int stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int g1, int g2) -{ - int xAdvance = 0; - - if (info->gpos) - xAdvance += stbtt__GetGlyphGPOSInfoAdvance(info, g1, g2); - else if (info->kern) - xAdvance += stbtt__GetGlyphKernInfoAdvance(info, g1, g2); - - return xAdvance; -} - -STBTT_DEF int stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2) -{ - if (!info->kern && !info->gpos) // if no kerning table, don't waste time looking up both codepoint->glyphs - return 0; - return stbtt_GetGlyphKernAdvance(info, stbtt_FindGlyphIndex(info,ch1), stbtt_FindGlyphIndex(info,ch2)); -} - -STBTT_DEF void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing) -{ - stbtt_GetGlyphHMetrics(info, stbtt_FindGlyphIndex(info,codepoint), advanceWidth, leftSideBearing); -} - -STBTT_DEF void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap) -{ - if (ascent ) *ascent = ttSHORT(info->data+info->hhea + 4); - if (descent) *descent = ttSHORT(info->data+info->hhea + 6); - if (lineGap) *lineGap = ttSHORT(info->data+info->hhea + 8); -} - -STBTT_DEF int stbtt_GetFontVMetricsOS2(const stbtt_fontinfo *info, int *typoAscent, int *typoDescent, int *typoLineGap) -{ - int tab = stbtt__find_table(info->data, info->fontstart, "OS/2"); - if (!tab) - return 0; - if (typoAscent ) *typoAscent = ttSHORT(info->data+tab + 68); - if (typoDescent) *typoDescent = ttSHORT(info->data+tab + 70); - if (typoLineGap) *typoLineGap = ttSHORT(info->data+tab + 72); - return 1; -} - -STBTT_DEF void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1) -{ - *x0 = ttSHORT(info->data + info->head + 36); - *y0 = ttSHORT(info->data + info->head + 38); - *x1 = ttSHORT(info->data + info->head + 40); - *y1 = ttSHORT(info->data + info->head + 42); -} - -STBTT_DEF float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float height) -{ - int fheight = ttSHORT(info->data + info->hhea + 4) - ttSHORT(info->data + info->hhea + 6); - return (float) height / fheight; -} - -STBTT_DEF float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels) -{ - int unitsPerEm = ttUSHORT(info->data + info->head + 18); - return pixels / unitsPerEm; -} - -STBTT_DEF void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *v) -{ - STBTT_free(v, info->userdata); -} - -STBTT_DEF stbtt_uint8 *stbtt_FindSVGDoc(const stbtt_fontinfo *info, int gl) -{ - int i; - stbtt_uint8 *data = info->data; - stbtt_uint8 *svg_doc_list = data + stbtt__get_svg((stbtt_fontinfo *) info); - - int numEntries = ttUSHORT(svg_doc_list); - stbtt_uint8 *svg_docs = svg_doc_list + 2; - - for(i=0; i= ttUSHORT(svg_doc)) && (gl <= ttUSHORT(svg_doc + 2))) - return svg_doc; - } - return 0; -} - -STBTT_DEF int stbtt_GetGlyphSVG(const stbtt_fontinfo *info, int gl, const char **svg) -{ - stbtt_uint8 *data = info->data; - stbtt_uint8 *svg_doc; - - if (info->svg == 0) - return 0; - - svg_doc = stbtt_FindSVGDoc(info, gl); - if (svg_doc != NULL) { - *svg = (char *) data + info->svg + ttULONG(svg_doc + 4); - return ttULONG(svg_doc + 8); - } else { - return 0; - } -} - -STBTT_DEF int stbtt_GetCodepointSVG(const stbtt_fontinfo *info, int unicode_codepoint, const char **svg) -{ - return stbtt_GetGlyphSVG(info, stbtt_FindGlyphIndex(info, unicode_codepoint), svg); -} - -////////////////////////////////////////////////////////////////////////////// -// -// antialiasing software rasterizer -// - -STBTT_DEF void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1) -{ - int x0=0,y0=0,x1,y1; // =0 suppresses compiler warning - if (!stbtt_GetGlyphBox(font, glyph, &x0,&y0,&x1,&y1)) { - // e.g. space character - if (ix0) *ix0 = 0; - if (iy0) *iy0 = 0; - if (ix1) *ix1 = 0; - if (iy1) *iy1 = 0; - } else { - // move to integral bboxes (treating pixels as little squares, what pixels get touched)? - if (ix0) *ix0 = STBTT_ifloor( x0 * scale_x + shift_x); - if (iy0) *iy0 = STBTT_ifloor(-y1 * scale_y + shift_y); - if (ix1) *ix1 = STBTT_iceil ( x1 * scale_x + shift_x); - if (iy1) *iy1 = STBTT_iceil (-y0 * scale_y + shift_y); - } -} - -STBTT_DEF void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1) -{ - stbtt_GetGlyphBitmapBoxSubpixel(font, glyph, scale_x, scale_y,0.0f,0.0f, ix0, iy0, ix1, iy1); -} - -STBTT_DEF void stbtt_GetCodepointBitmapBoxSubpixel(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1) -{ - stbtt_GetGlyphBitmapBoxSubpixel(font, stbtt_FindGlyphIndex(font,codepoint), scale_x, scale_y,shift_x,shift_y, ix0,iy0,ix1,iy1); -} - -STBTT_DEF void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1) -{ - stbtt_GetCodepointBitmapBoxSubpixel(font, codepoint, scale_x, scale_y,0.0f,0.0f, ix0,iy0,ix1,iy1); -} - -////////////////////////////////////////////////////////////////////////////// -// -// Rasterizer - -typedef struct stbtt__hheap_chunk -{ - struct stbtt__hheap_chunk *next; -} stbtt__hheap_chunk; - -typedef struct stbtt__hheap -{ - struct stbtt__hheap_chunk *head; - void *first_free; - int num_remaining_in_head_chunk; -} stbtt__hheap; - -static void *stbtt__hheap_alloc(stbtt__hheap *hh, size_t size, void *userdata) -{ - if (hh->first_free) { - void *p = hh->first_free; - hh->first_free = * (void **) p; - return p; - } else { - if (hh->num_remaining_in_head_chunk == 0) { - int count = (size < 32 ? 2000 : size < 128 ? 800 : 100); - stbtt__hheap_chunk *c = (stbtt__hheap_chunk *) STBTT_malloc(sizeof(stbtt__hheap_chunk) + size * count, userdata); - if (c == NULL) - return NULL; - c->next = hh->head; - hh->head = c; - hh->num_remaining_in_head_chunk = count; - } - --hh->num_remaining_in_head_chunk; - return (char *) (hh->head) + sizeof(stbtt__hheap_chunk) + size * hh->num_remaining_in_head_chunk; - } -} - -static void stbtt__hheap_free(stbtt__hheap *hh, void *p) -{ - *(void **) p = hh->first_free; - hh->first_free = p; -} - -static void stbtt__hheap_cleanup(stbtt__hheap *hh, void *userdata) -{ - stbtt__hheap_chunk *c = hh->head; - while (c) { - stbtt__hheap_chunk *n = c->next; - STBTT_free(c, userdata); - c = n; - } -} - -typedef struct stbtt__edge { - float x0,y0, x1,y1; - int invert; -} stbtt__edge; - - -typedef struct stbtt__active_edge -{ - struct stbtt__active_edge *next; - #if STBTT_RASTERIZER_VERSION==1 - int x,dx; - float ey; - int direction; - #elif STBTT_RASTERIZER_VERSION==2 - float fx,fdx,fdy; - float direction; - float sy; - float ey; - #else - #error "Unrecognized value of STBTT_RASTERIZER_VERSION" - #endif -} stbtt__active_edge; - -#if STBTT_RASTERIZER_VERSION == 1 -#define STBTT_FIXSHIFT 10 -#define STBTT_FIX (1 << STBTT_FIXSHIFT) -#define STBTT_FIXMASK (STBTT_FIX-1) - -static stbtt__active_edge *stbtt__new_active(stbtt__hheap *hh, stbtt__edge *e, int off_x, float start_point, void *userdata) -{ - stbtt__active_edge *z = (stbtt__active_edge *) stbtt__hheap_alloc(hh, sizeof(*z), userdata); - float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0); - STBTT_assert(z != NULL); - if (!z) return z; - - // round dx down to avoid overshooting - if (dxdy < 0) - z->dx = -STBTT_ifloor(STBTT_FIX * -dxdy); - else - z->dx = STBTT_ifloor(STBTT_FIX * dxdy); - - z->x = STBTT_ifloor(STBTT_FIX * e->x0 + z->dx * (start_point - e->y0)); // use z->dx so when we offset later it's by the same amount - z->x -= off_x * STBTT_FIX; - - z->ey = e->y1; - z->next = 0; - z->direction = e->invert ? 1 : -1; - return z; -} -#elif STBTT_RASTERIZER_VERSION == 2 -static stbtt__active_edge *stbtt__new_active(stbtt__hheap *hh, stbtt__edge *e, int off_x, float start_point, void *userdata) -{ - stbtt__active_edge *z = (stbtt__active_edge *) stbtt__hheap_alloc(hh, sizeof(*z), userdata); - float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0); - STBTT_assert(z != NULL); - //STBTT_assert(e->y0 <= start_point); - if (!z) return z; - z->fdx = dxdy; - z->fdy = dxdy != 0.0f ? (1.0f/dxdy) : 0.0f; - z->fx = e->x0 + dxdy * (start_point - e->y0); - z->fx -= off_x; - z->direction = e->invert ? 1.0f : -1.0f; - z->sy = e->y0; - z->ey = e->y1; - z->next = 0; - return z; -} -#else -#error "Unrecognized value of STBTT_RASTERIZER_VERSION" -#endif - -#if STBTT_RASTERIZER_VERSION == 1 -// note: this routine clips fills that extend off the edges... ideally this -// wouldn't happen, but it could happen if the truetype glyph bounding boxes -// are wrong, or if the user supplies a too-small bitmap -static void stbtt__fill_active_edges(unsigned char *scanline, int len, stbtt__active_edge *e, int max_weight) -{ - // non-zero winding fill - int x0=0, w=0; - - while (e) { - if (w == 0) { - // if we're currently at zero, we need to record the edge start point - x0 = e->x; w += e->direction; - } else { - int x1 = e->x; w += e->direction; - // if we went to zero, we need to draw - if (w == 0) { - int i = x0 >> STBTT_FIXSHIFT; - int j = x1 >> STBTT_FIXSHIFT; - - if (i < len && j >= 0) { - if (i == j) { - // x0,x1 are the same pixel, so compute combined coverage - scanline[i] = scanline[i] + (stbtt_uint8) ((x1 - x0) * max_weight >> STBTT_FIXSHIFT); - } else { - if (i >= 0) // add antialiasing for x0 - scanline[i] = scanline[i] + (stbtt_uint8) (((STBTT_FIX - (x0 & STBTT_FIXMASK)) * max_weight) >> STBTT_FIXSHIFT); - else - i = -1; // clip - - if (j < len) // add antialiasing for x1 - scanline[j] = scanline[j] + (stbtt_uint8) (((x1 & STBTT_FIXMASK) * max_weight) >> STBTT_FIXSHIFT); - else - j = len; // clip - - for (++i; i < j; ++i) // fill pixels between x0 and x1 - scanline[i] = scanline[i] + (stbtt_uint8) max_weight; - } - } - } - } - - e = e->next; - } -} - -static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, int n, int vsubsample, int off_x, int off_y, void *userdata) -{ - stbtt__hheap hh = { 0, 0, 0 }; - stbtt__active_edge *active = NULL; - int y,j=0; - int max_weight = (255 / vsubsample); // weight per vertical scanline - int s; // vertical subsample index - unsigned char scanline_data[512], *scanline; - - if (result->w > 512) - scanline = (unsigned char *) STBTT_malloc(result->w, userdata); - else - scanline = scanline_data; - - y = off_y * vsubsample; - e[n].y0 = (off_y + result->h) * (float) vsubsample + 1; - - while (j < result->h) { - STBTT_memset(scanline, 0, result->w); - for (s=0; s < vsubsample; ++s) { - // find center of pixel for this scanline - float scan_y = y + 0.5f; - stbtt__active_edge **step = &active; - - // update all active edges; - // remove all active edges that terminate before the center of this scanline - while (*step) { - stbtt__active_edge * z = *step; - if (z->ey <= scan_y) { - *step = z->next; // delete from list - STBTT_assert(z->direction); - z->direction = 0; - stbtt__hheap_free(&hh, z); - } else { - z->x += z->dx; // advance to position for current scanline - step = &((*step)->next); // advance through list - } - } - - // resort the list if needed - for(;;) { - int changed=0; - step = &active; - while (*step && (*step)->next) { - if ((*step)->x > (*step)->next->x) { - stbtt__active_edge *t = *step; - stbtt__active_edge *q = t->next; - - t->next = q->next; - q->next = t; - *step = q; - changed = 1; - } - step = &(*step)->next; - } - if (!changed) break; - } - - // insert all edges that start before the center of this scanline -- omit ones that also end on this scanline - while (e->y0 <= scan_y) { - if (e->y1 > scan_y) { - stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y, userdata); - if (z != NULL) { - // find insertion point - if (active == NULL) - active = z; - else if (z->x < active->x) { - // insert at front - z->next = active; - active = z; - } else { - // find thing to insert AFTER - stbtt__active_edge *p = active; - while (p->next && p->next->x < z->x) - p = p->next; - // at this point, p->next->x is NOT < z->x - z->next = p->next; - p->next = z; - } - } - } - ++e; - } - - // now process all active edges in XOR fashion - if (active) - stbtt__fill_active_edges(scanline, result->w, active, max_weight); - - ++y; - } - STBTT_memcpy(result->pixels + j * result->stride, scanline, result->w); - ++j; - } - - stbtt__hheap_cleanup(&hh, userdata); - - if (scanline != scanline_data) - STBTT_free(scanline, userdata); -} - -#elif STBTT_RASTERIZER_VERSION == 2 - -// the edge passed in here does not cross the vertical line at x or the vertical line at x+1 -// (i.e. it has already been clipped to those) -static void stbtt__handle_clipped_edge(float *scanline, int x, stbtt__active_edge *e, float x0, float y0, float x1, float y1) -{ - if (y0 == y1) return; - STBTT_assert(y0 < y1); - STBTT_assert(e->sy <= e->ey); - if (y0 > e->ey) return; - if (y1 < e->sy) return; - if (y0 < e->sy) { - x0 += (x1-x0) * (e->sy - y0) / (y1-y0); - y0 = e->sy; - } - if (y1 > e->ey) { - x1 += (x1-x0) * (e->ey - y1) / (y1-y0); - y1 = e->ey; - } - - if (x0 == x) - STBTT_assert(x1 <= x+1); - else if (x0 == x+1) - STBTT_assert(x1 >= x); - else if (x0 <= x) - STBTT_assert(x1 <= x); - else if (x0 >= x+1) - STBTT_assert(x1 >= x+1); - else - STBTT_assert(x1 >= x && x1 <= x+1); - - if (x0 <= x && x1 <= x) - scanline[x] += e->direction * (y1-y0); - else if (x0 >= x+1 && x1 >= x+1) - ; - else { - STBTT_assert(x0 >= x && x0 <= x+1 && x1 >= x && x1 <= x+1); - scanline[x] += e->direction * (y1-y0) * (1-((x0-x)+(x1-x))/2); // coverage = 1 - average x position - } -} - -static float stbtt__sized_trapezoid_area(float height, float top_width, float bottom_width) -{ - STBTT_assert(top_width >= 0); - STBTT_assert(bottom_width >= 0); - return (top_width + bottom_width) / 2.0f * height; -} - -static float stbtt__position_trapezoid_area(float height, float tx0, float tx1, float bx0, float bx1) -{ - return stbtt__sized_trapezoid_area(height, tx1 - tx0, bx1 - bx0); -} - -static float stbtt__sized_triangle_area(float height, float width) -{ - return height * width / 2; -} - -static void stbtt__fill_active_edges_new(float *scanline, float *scanline_fill, int len, stbtt__active_edge *e, float y_top) -{ - float y_bottom = y_top+1; - - while (e) { - // brute force every pixel - - // compute intersection points with top & bottom - STBTT_assert(e->ey >= y_top); - - if (e->fdx == 0) { - float x0 = e->fx; - if (x0 < len) { - if (x0 >= 0) { - stbtt__handle_clipped_edge(scanline,(int) x0,e, x0,y_top, x0,y_bottom); - stbtt__handle_clipped_edge(scanline_fill-1,(int) x0+1,e, x0,y_top, x0,y_bottom); - } else { - stbtt__handle_clipped_edge(scanline_fill-1,0,e, x0,y_top, x0,y_bottom); - } - } - } else { - float x0 = e->fx; - float dx = e->fdx; - float xb = x0 + dx; - float x_top, x_bottom; - float sy0,sy1; - float dy = e->fdy; - STBTT_assert(e->sy <= y_bottom && e->ey >= y_top); - - // compute endpoints of line segment clipped to this scanline (if the - // line segment starts on this scanline. x0 is the intersection of the - // line with y_top, but that may be off the line segment. - if (e->sy > y_top) { - x_top = x0 + dx * (e->sy - y_top); - sy0 = e->sy; - } else { - x_top = x0; - sy0 = y_top; - } - if (e->ey < y_bottom) { - x_bottom = x0 + dx * (e->ey - y_top); - sy1 = e->ey; - } else { - x_bottom = xb; - sy1 = y_bottom; - } - - if (x_top >= 0 && x_bottom >= 0 && x_top < len && x_bottom < len) { - // from here on, we don't have to range check x values - - if ((int) x_top == (int) x_bottom) { - float height; - // simple case, only spans one pixel - int x = (int) x_top; - height = (sy1 - sy0) * e->direction; - STBTT_assert(x >= 0 && x < len); - scanline[x] += stbtt__position_trapezoid_area(height, x_top, x+1.0f, x_bottom, x+1.0f); - scanline_fill[x] += height; // everything right of this pixel is filled - } else { - int x,x1,x2; - float y_crossing, y_final, step, sign, area; - // covers 2+ pixels - if (x_top > x_bottom) { - // flip scanline vertically; signed area is the same - float t; - sy0 = y_bottom - (sy0 - y_top); - sy1 = y_bottom - (sy1 - y_top); - t = sy0, sy0 = sy1, sy1 = t; - t = x_bottom, x_bottom = x_top, x_top = t; - dx = -dx; - dy = -dy; - t = x0, x0 = xb, xb = t; - } - STBTT_assert(dy >= 0); - STBTT_assert(dx >= 0); - - x1 = (int) x_top; - x2 = (int) x_bottom; - // compute intersection with y axis at x1+1 - y_crossing = y_top + dy * (x1+1 - x0); - - // compute intersection with y axis at x2 - y_final = y_top + dy * (x2 - x0); - - // x1 x_top x2 x_bottom - // y_top +------|-----+------------+------------+--------|---+------------+ - // | | | | | | - // | | | | | | - // sy0 | Txxxxx|............|............|............|............| - // y_crossing | *xxxxx.......|............|............|............| - // | | xxxxx..|............|............|............| - // | | /- xx*xxxx........|............|............| - // | | dy < | xxxxxx..|............|............| - // y_final | | \- | xx*xxx.........|............| - // sy1 | | | | xxxxxB...|............| - // | | | | | | - // | | | | | | - // y_bottom +------------+------------+------------+------------+------------+ - // - // goal is to measure the area covered by '.' in each pixel - - // if x2 is right at the right edge of x1, y_crossing can blow up, github #1057 - // @TODO: maybe test against sy1 rather than y_bottom? - if (y_crossing > y_bottom) - y_crossing = y_bottom; - - sign = e->direction; - - // area of the rectangle covered from sy0..y_crossing - area = sign * (y_crossing-sy0); - - // area of the triangle (x_top,sy0), (x1+1,sy0), (x1+1,y_crossing) - scanline[x1] += stbtt__sized_triangle_area(area, x1+1 - x_top); - - // check if final y_crossing is blown up; no test case for this - if (y_final > y_bottom) { - y_final = y_bottom; - dy = (y_final - y_crossing ) / (x2 - (x1+1)); // if denom=0, y_final = y_crossing, so y_final <= y_bottom - } - - // in second pixel, area covered by line segment found in first pixel - // is always a rectangle 1 wide * the height of that line segment; this - // is exactly what the variable 'area' stores. it also gets a contribution - // from the line segment within it. the THIRD pixel will get the first - // pixel's rectangle contribution, the second pixel's rectangle contribution, - // and its own contribution. the 'own contribution' is the same in every pixel except - // the leftmost and rightmost, a trapezoid that slides down in each pixel. - // the second pixel's contribution to the third pixel will be the - // rectangle 1 wide times the height change in the second pixel, which is dy. - - step = sign * dy * 1; // dy is dy/dx, change in y for every 1 change in x, - // which multiplied by 1-pixel-width is how much pixel area changes for each step in x - // so the area advances by 'step' every time - - for (x = x1+1; x < x2; ++x) { - scanline[x] += area + step/2; // area of trapezoid is 1*step/2 - area += step; - } - STBTT_assert(STBTT_fabs(area) <= 1.01f); // accumulated error from area += step unless we round step down - STBTT_assert(sy1 > y_final-0.01f); - - // area covered in the last pixel is the rectangle from all the pixels to the left, - // plus the trapezoid filled by the line segment in this pixel all the way to the right edge - scanline[x2] += area + sign * stbtt__position_trapezoid_area(sy1-y_final, (float) x2, x2+1.0f, x_bottom, x2+1.0f); - - // the rest of the line is filled based on the total height of the line segment in this pixel - scanline_fill[x2] += sign * (sy1-sy0); - } - } else { - // if edge goes outside of box we're drawing, we require - // clipping logic. since this does not match the intended use - // of this library, we use a different, very slow brute - // force implementation - // note though that this does happen some of the time because - // x_top and x_bottom can be extrapolated at the top & bottom of - // the shape and actually lie outside the bounding box - int x; - for (x=0; x < len; ++x) { - // cases: - // - // there can be up to two intersections with the pixel. any intersection - // with left or right edges can be handled by splitting into two (or three) - // regions. intersections with top & bottom do not necessitate case-wise logic. - // - // the old way of doing this found the intersections with the left & right edges, - // then used some simple logic to produce up to three segments in sorted order - // from top-to-bottom. however, this had a problem: if an x edge was epsilon - // across the x border, then the corresponding y position might not be distinct - // from the other y segment, and it might ignored as an empty segment. to avoid - // that, we need to explicitly produce segments based on x positions. - - // rename variables to clearly-defined pairs - float y0 = y_top; - float x1 = (float) (x); - float x2 = (float) (x+1); - float x3 = xb; - float y3 = y_bottom; - - // x = e->x + e->dx * (y-y_top) - // (y-y_top) = (x - e->x) / e->dx - // y = (x - e->x) / e->dx + y_top - float y1 = (x - x0) / dx + y_top; - float y2 = (x+1 - x0) / dx + y_top; - - if (x0 < x1 && x3 > x2) { // three segments descending down-right - stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1); - stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x2,y2); - stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3); - } else if (x3 < x1 && x0 > x2) { // three segments descending down-left - stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2); - stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x1,y1); - stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3); - } else if (x0 < x1 && x3 > x1) { // two segments across x, down-right - stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1); - stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3); - } else if (x3 < x1 && x0 > x1) { // two segments across x, down-left - stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1); - stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3); - } else if (x0 < x2 && x3 > x2) { // two segments across x+1, down-right - stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2); - stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3); - } else if (x3 < x2 && x0 > x2) { // two segments across x+1, down-left - stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2); - stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3); - } else { // one segment - stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x3,y3); - } - } - } - } - e = e->next; - } -} - -// directly AA rasterize edges w/o supersampling -static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, int n, int vsubsample, int off_x, int off_y, void *userdata) -{ - stbtt__hheap hh = { 0, 0, 0 }; - stbtt__active_edge *active = NULL; - int y,j=0, i; - float scanline_data[129], *scanline, *scanline2; - - STBTT__NOTUSED(vsubsample); - - if (result->w > 64) - scanline = (float *) STBTT_malloc((result->w*2+1) * sizeof(float), userdata); - else - scanline = scanline_data; - - scanline2 = scanline + result->w; - - y = off_y; - e[n].y0 = (float) (off_y + result->h) + 1; - - while (j < result->h) { - // find center of pixel for this scanline - float scan_y_top = y + 0.0f; - float scan_y_bottom = y + 1.0f; - stbtt__active_edge **step = &active; - - STBTT_memset(scanline , 0, result->w*sizeof(scanline[0])); - STBTT_memset(scanline2, 0, (result->w+1)*sizeof(scanline[0])); - - // update all active edges; - // remove all active edges that terminate before the top of this scanline - while (*step) { - stbtt__active_edge * z = *step; - if (z->ey <= scan_y_top) { - *step = z->next; // delete from list - STBTT_assert(z->direction); - z->direction = 0; - stbtt__hheap_free(&hh, z); - } else { - step = &((*step)->next); // advance through list - } - } - - // insert all edges that start before the bottom of this scanline - while (e->y0 <= scan_y_bottom) { - if (e->y0 != e->y1) { - stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y_top, userdata); - if (z != NULL) { - if (j == 0 && off_y != 0) { - if (z->ey < scan_y_top) { - // this can happen due to subpixel positioning and some kind of fp rounding error i think - z->ey = scan_y_top; - } - } - STBTT_assert(z->ey >= scan_y_top); // if we get really unlucky a tiny bit of an edge can be out of bounds - // insert at front - z->next = active; - active = z; - } - } - ++e; - } - - // now process all active edges - if (active) - stbtt__fill_active_edges_new(scanline, scanline2+1, result->w, active, scan_y_top); - - { - float sum = 0; - for (i=0; i < result->w; ++i) { - float k; - int m; - sum += scanline2[i]; - k = scanline[i] + sum; - k = (float) STBTT_fabs(k)*255 + 0.5f; - m = (int) k; - if (m > 255) m = 255; - result->pixels[j*result->stride + i] = (unsigned char) m; - } - } - // advance all the edges - step = &active; - while (*step) { - stbtt__active_edge *z = *step; - z->fx += z->fdx; // advance to position for current scanline - step = &((*step)->next); // advance through list - } - - ++y; - ++j; - } - - stbtt__hheap_cleanup(&hh, userdata); - - if (scanline != scanline_data) - STBTT_free(scanline, userdata); -} -#else -#error "Unrecognized value of STBTT_RASTERIZER_VERSION" -#endif - -#define STBTT__COMPARE(a,b) ((a)->y0 < (b)->y0) - -static void stbtt__sort_edges_ins_sort(stbtt__edge *p, int n) -{ - int i,j; - for (i=1; i < n; ++i) { - stbtt__edge t = p[i], *a = &t; - j = i; - while (j > 0) { - stbtt__edge *b = &p[j-1]; - int c = STBTT__COMPARE(a,b); - if (!c) break; - p[j] = p[j-1]; - --j; - } - if (i != j) - p[j] = t; - } -} - -static void stbtt__sort_edges_quicksort(stbtt__edge *p, int n) -{ - /* threshold for transitioning to insertion sort */ - while (n > 12) { - stbtt__edge t; - int c01,c12,c,m,i,j; - - /* compute median of three */ - m = n >> 1; - c01 = STBTT__COMPARE(&p[0],&p[m]); - c12 = STBTT__COMPARE(&p[m],&p[n-1]); - /* if 0 >= mid >= end, or 0 < mid < end, then use mid */ - if (c01 != c12) { - /* otherwise, we'll need to swap something else to middle */ - int z; - c = STBTT__COMPARE(&p[0],&p[n-1]); - /* 0>mid && midn => n; 0 0 */ - /* 0n: 0>n => 0; 0 n */ - z = (c == c12) ? 0 : n-1; - t = p[z]; - p[z] = p[m]; - p[m] = t; - } - /* now p[m] is the median-of-three */ - /* swap it to the beginning so it won't move around */ - t = p[0]; - p[0] = p[m]; - p[m] = t; - - /* partition loop */ - i=1; - j=n-1; - for(;;) { - /* handling of equality is crucial here */ - /* for sentinels & efficiency with duplicates */ - for (;;++i) { - if (!STBTT__COMPARE(&p[i], &p[0])) break; - } - for (;;--j) { - if (!STBTT__COMPARE(&p[0], &p[j])) break; - } - /* make sure we haven't crossed */ - if (i >= j) break; - t = p[i]; - p[i] = p[j]; - p[j] = t; - - ++i; - --j; - } - /* recurse on smaller side, iterate on larger */ - if (j < (n-i)) { - stbtt__sort_edges_quicksort(p,j); - p = p+i; - n = n-i; - } else { - stbtt__sort_edges_quicksort(p+i, n-i); - n = j; - } - } -} - -static void stbtt__sort_edges(stbtt__edge *p, int n) -{ - stbtt__sort_edges_quicksort(p, n); - stbtt__sort_edges_ins_sort(p, n); -} - -typedef struct -{ - float x,y; -} stbtt__point; - -static void stbtt__rasterize(stbtt__bitmap *result, stbtt__point *pts, int *wcount, int windings, float scale_x, float scale_y, float shift_x, float shift_y, int off_x, int off_y, int invert, void *userdata) -{ - float y_scale_inv = invert ? -scale_y : scale_y; - stbtt__edge *e; - int n,i,j,k,m; -#if STBTT_RASTERIZER_VERSION == 1 - int vsubsample = result->h < 8 ? 15 : 5; -#elif STBTT_RASTERIZER_VERSION == 2 - int vsubsample = 1; -#else - #error "Unrecognized value of STBTT_RASTERIZER_VERSION" -#endif - // vsubsample should divide 255 evenly; otherwise we won't reach full opacity - - // now we have to blow out the windings into explicit edge lists - n = 0; - for (i=0; i < windings; ++i) - n += wcount[i]; - - e = (stbtt__edge *) STBTT_malloc(sizeof(*e) * (n+1), userdata); // add an extra one as a sentinel - if (e == 0) return; - n = 0; - - m=0; - for (i=0; i < windings; ++i) { - stbtt__point *p = pts + m; - m += wcount[i]; - j = wcount[i]-1; - for (k=0; k < wcount[i]; j=k++) { - int a=k,b=j; - // skip the edge if horizontal - if (p[j].y == p[k].y) - continue; - // add edge from j to k to the list - e[n].invert = 0; - if (invert ? p[j].y > p[k].y : p[j].y < p[k].y) { - e[n].invert = 1; - a=j,b=k; - } - e[n].x0 = p[a].x * scale_x + shift_x; - e[n].y0 = (p[a].y * y_scale_inv + shift_y) * vsubsample; - e[n].x1 = p[b].x * scale_x + shift_x; - e[n].y1 = (p[b].y * y_scale_inv + shift_y) * vsubsample; - ++n; - } - } - - // now sort the edges by their highest point (should snap to integer, and then by x) - //STBTT_sort(e, n, sizeof(e[0]), stbtt__edge_compare); - stbtt__sort_edges(e, n); - - // now, traverse the scanlines and find the intersections on each scanline, use xor winding rule - stbtt__rasterize_sorted_edges(result, e, n, vsubsample, off_x, off_y, userdata); - - STBTT_free(e, userdata); -} - -static void stbtt__add_point(stbtt__point *points, int n, float x, float y) -{ - if (!points) return; // during first pass, it's unallocated - points[n].x = x; - points[n].y = y; -} - -// tessellate until threshold p is happy... @TODO warped to compensate for non-linear stretching -static int stbtt__tesselate_curve(stbtt__point *points, int *num_points, float x0, float y0, float x1, float y1, float x2, float y2, float objspace_flatness_squared, int n) -{ - // midpoint - float mx = (x0 + 2*x1 + x2)/4; - float my = (y0 + 2*y1 + y2)/4; - // versus directly drawn line - float dx = (x0+x2)/2 - mx; - float dy = (y0+y2)/2 - my; - if (n > 16) // 65536 segments on one curve better be enough! - return 1; - if (dx*dx+dy*dy > objspace_flatness_squared) { // half-pixel error allowed... need to be smaller if AA - stbtt__tesselate_curve(points, num_points, x0,y0, (x0+x1)/2.0f,(y0+y1)/2.0f, mx,my, objspace_flatness_squared,n+1); - stbtt__tesselate_curve(points, num_points, mx,my, (x1+x2)/2.0f,(y1+y2)/2.0f, x2,y2, objspace_flatness_squared,n+1); - } else { - stbtt__add_point(points, *num_points,x2,y2); - *num_points = *num_points+1; - } - return 1; -} - -static void stbtt__tesselate_cubic(stbtt__point *points, int *num_points, float x0, float y0, float x1, float y1, float x2, float y2, float x3, float y3, float objspace_flatness_squared, int n) -{ - // @TODO this "flatness" calculation is just made-up nonsense that seems to work well enough - float dx0 = x1-x0; - float dy0 = y1-y0; - float dx1 = x2-x1; - float dy1 = y2-y1; - float dx2 = x3-x2; - float dy2 = y3-y2; - float dx = x3-x0; - float dy = y3-y0; - float longlen = (float) (STBTT_sqrt(dx0*dx0+dy0*dy0)+STBTT_sqrt(dx1*dx1+dy1*dy1)+STBTT_sqrt(dx2*dx2+dy2*dy2)); - float shortlen = (float) STBTT_sqrt(dx*dx+dy*dy); - float flatness_squared = longlen*longlen-shortlen*shortlen; - - if (n > 16) // 65536 segments on one curve better be enough! - return; - - if (flatness_squared > objspace_flatness_squared) { - float x01 = (x0+x1)/2; - float y01 = (y0+y1)/2; - float x12 = (x1+x2)/2; - float y12 = (y1+y2)/2; - float x23 = (x2+x3)/2; - float y23 = (y2+y3)/2; - - float xa = (x01+x12)/2; - float ya = (y01+y12)/2; - float xb = (x12+x23)/2; - float yb = (y12+y23)/2; - - float mx = (xa+xb)/2; - float my = (ya+yb)/2; - - stbtt__tesselate_cubic(points, num_points, x0,y0, x01,y01, xa,ya, mx,my, objspace_flatness_squared,n+1); - stbtt__tesselate_cubic(points, num_points, mx,my, xb,yb, x23,y23, x3,y3, objspace_flatness_squared,n+1); - } else { - stbtt__add_point(points, *num_points,x3,y3); - *num_points = *num_points+1; - } -} - -// returns number of contours -static stbtt__point *stbtt_FlattenCurves(stbtt_vertex *vertices, int num_verts, float objspace_flatness, int **contour_lengths, int *num_contours, void *userdata) -{ - stbtt__point *points=0; - int num_points=0; - - float objspace_flatness_squared = objspace_flatness * objspace_flatness; - int i,n=0,start=0, pass; - - // count how many "moves" there are to get the contour count - for (i=0; i < num_verts; ++i) - if (vertices[i].type == STBTT_vmove) - ++n; - - *num_contours = n; - if (n == 0) return 0; - - *contour_lengths = (int *) STBTT_malloc(sizeof(**contour_lengths) * n, userdata); - - if (*contour_lengths == 0) { - *num_contours = 0; - return 0; - } - - // make two passes through the points so we don't need to realloc - for (pass=0; pass < 2; ++pass) { - float x=0,y=0; - if (pass == 1) { - points = (stbtt__point *) STBTT_malloc(num_points * sizeof(points[0]), userdata); - if (points == NULL) goto error; - } - num_points = 0; - n= -1; - for (i=0; i < num_verts; ++i) { - switch (vertices[i].type) { - case STBTT_vmove: - // start the next contour - if (n >= 0) - (*contour_lengths)[n] = num_points - start; - ++n; - start = num_points; - - x = vertices[i].x, y = vertices[i].y; - stbtt__add_point(points, num_points++, x,y); - break; - case STBTT_vline: - x = vertices[i].x, y = vertices[i].y; - stbtt__add_point(points, num_points++, x, y); - break; - case STBTT_vcurve: - stbtt__tesselate_curve(points, &num_points, x,y, - vertices[i].cx, vertices[i].cy, - vertices[i].x, vertices[i].y, - objspace_flatness_squared, 0); - x = vertices[i].x, y = vertices[i].y; - break; - case STBTT_vcubic: - stbtt__tesselate_cubic(points, &num_points, x,y, - vertices[i].cx, vertices[i].cy, - vertices[i].cx1, vertices[i].cy1, - vertices[i].x, vertices[i].y, - objspace_flatness_squared, 0); - x = vertices[i].x, y = vertices[i].y; - break; - } - } - (*contour_lengths)[n] = num_points - start; - } - - return points; -error: - STBTT_free(points, userdata); - STBTT_free(*contour_lengths, userdata); - *contour_lengths = 0; - *num_contours = 0; - return NULL; -} - -STBTT_DEF void stbtt_Rasterize(stbtt__bitmap *result, float flatness_in_pixels, stbtt_vertex *vertices, int num_verts, float scale_x, float scale_y, float shift_x, float shift_y, int x_off, int y_off, int invert, void *userdata) -{ - float scale = scale_x > scale_y ? scale_y : scale_x; - int winding_count = 0; - int *winding_lengths = NULL; - stbtt__point *windings = stbtt_FlattenCurves(vertices, num_verts, flatness_in_pixels / scale, &winding_lengths, &winding_count, userdata); - if (windings) { - stbtt__rasterize(result, windings, winding_lengths, winding_count, scale_x, scale_y, shift_x, shift_y, x_off, y_off, invert, userdata); - STBTT_free(winding_lengths, userdata); - STBTT_free(windings, userdata); - } -} - -STBTT_DEF void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata) -{ - STBTT_free(bitmap, userdata); -} - -STBTT_DEF unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int glyph, int *width, int *height, int *xoff, int *yoff) -{ - int ix0,iy0,ix1,iy1; - stbtt__bitmap gbm; - stbtt_vertex *vertices; - int num_verts = stbtt_GetGlyphShape(info, glyph, &vertices); - - if (scale_x == 0) scale_x = scale_y; - if (scale_y == 0) { - if (scale_x == 0) { - STBTT_free(vertices, info->userdata); - return NULL; - } - scale_y = scale_x; - } - - stbtt_GetGlyphBitmapBoxSubpixel(info, glyph, scale_x, scale_y, shift_x, shift_y, &ix0,&iy0,&ix1,&iy1); - - // now we get the size - gbm.w = (ix1 - ix0); - gbm.h = (iy1 - iy0); - gbm.pixels = NULL; // in case we error - - if (width ) *width = gbm.w; - if (height) *height = gbm.h; - if (xoff ) *xoff = ix0; - if (yoff ) *yoff = iy0; - - if (gbm.w && gbm.h) { - gbm.pixels = (unsigned char *) STBTT_malloc(gbm.w * gbm.h, info->userdata); - if (gbm.pixels) { - gbm.stride = gbm.w; - - stbtt_Rasterize(&gbm, 0.35f, vertices, num_verts, scale_x, scale_y, shift_x, shift_y, ix0, iy0, 1, info->userdata); - } - } - STBTT_free(vertices, info->userdata); - return gbm.pixels; -} - -STBTT_DEF unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff) -{ - return stbtt_GetGlyphBitmapSubpixel(info, scale_x, scale_y, 0.0f, 0.0f, glyph, width, height, xoff, yoff); -} - -STBTT_DEF void stbtt_MakeGlyphBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int glyph) -{ - int ix0,iy0; - stbtt_vertex *vertices; - int num_verts = stbtt_GetGlyphShape(info, glyph, &vertices); - stbtt__bitmap gbm; - - stbtt_GetGlyphBitmapBoxSubpixel(info, glyph, scale_x, scale_y, shift_x, shift_y, &ix0,&iy0,0,0); - gbm.pixels = output; - gbm.w = out_w; - gbm.h = out_h; - gbm.stride = out_stride; - - if (gbm.w && gbm.h) - stbtt_Rasterize(&gbm, 0.35f, vertices, num_verts, scale_x, scale_y, shift_x, shift_y, ix0,iy0, 1, info->userdata); - - STBTT_free(vertices, info->userdata); -} - -STBTT_DEF void stbtt_MakeGlyphBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int glyph) -{ - stbtt_MakeGlyphBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, 0.0f,0.0f, glyph); -} - -STBTT_DEF unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff) -{ - return stbtt_GetGlyphBitmapSubpixel(info, scale_x, scale_y,shift_x,shift_y, stbtt_FindGlyphIndex(info,codepoint), width,height,xoff,yoff); -} - -STBTT_DEF void stbtt_MakeCodepointBitmapSubpixelPrefilter(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int oversample_x, int oversample_y, float *sub_x, float *sub_y, int codepoint) -{ - stbtt_MakeGlyphBitmapSubpixelPrefilter(info, output, out_w, out_h, out_stride, scale_x, scale_y, shift_x, shift_y, oversample_x, oversample_y, sub_x, sub_y, stbtt_FindGlyphIndex(info,codepoint)); -} - -STBTT_DEF void stbtt_MakeCodepointBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint) -{ - stbtt_MakeGlyphBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, shift_x, shift_y, stbtt_FindGlyphIndex(info,codepoint)); -} - -STBTT_DEF unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff) -{ - return stbtt_GetCodepointBitmapSubpixel(info, scale_x, scale_y, 0.0f,0.0f, codepoint, width,height,xoff,yoff); -} - -STBTT_DEF void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint) -{ - stbtt_MakeCodepointBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, 0.0f,0.0f, codepoint); -} - -////////////////////////////////////////////////////////////////////////////// -// -// bitmap baking -// -// This is SUPER-CRAPPY packing to keep source code small - -static int stbtt_BakeFontBitmap_internal(unsigned char *data, int offset, // font location (use offset=0 for plain .ttf) - float pixel_height, // height of font in pixels - unsigned char *pixels, int pw, int ph, // bitmap to be filled in - int first_char, int num_chars, // characters to bake - stbtt_bakedchar *chardata) -{ - float scale; - int x,y,bottom_y, i; - stbtt_fontinfo f; - f.userdata = NULL; - if (!stbtt_InitFont(&f, data, offset)) - return -1; - STBTT_memset(pixels, 0, pw*ph); // background of 0 around pixels - x=y=1; - bottom_y = 1; - - scale = stbtt_ScaleForPixelHeight(&f, pixel_height); - - for (i=0; i < num_chars; ++i) { - int advance, lsb, x0,y0,x1,y1,gw,gh; - int g = stbtt_FindGlyphIndex(&f, first_char + i); - stbtt_GetGlyphHMetrics(&f, g, &advance, &lsb); - stbtt_GetGlyphBitmapBox(&f, g, scale,scale, &x0,&y0,&x1,&y1); - gw = x1-x0; - gh = y1-y0; - if (x + gw + 1 >= pw) - y = bottom_y, x = 1; // advance to next row - if (y + gh + 1 >= ph) // check if it fits vertically AFTER potentially moving to next row - return -i; - STBTT_assert(x+gw < pw); - STBTT_assert(y+gh < ph); - stbtt_MakeGlyphBitmap(&f, pixels+x+y*pw, gw,gh,pw, scale,scale, g); - chardata[i].x0 = (stbtt_int16) x; - chardata[i].y0 = (stbtt_int16) y; - chardata[i].x1 = (stbtt_int16) (x + gw); - chardata[i].y1 = (stbtt_int16) (y + gh); - chardata[i].xadvance = scale * advance; - chardata[i].xoff = (float) x0; - chardata[i].yoff = (float) y0; - x = x + gw + 1; - if (y+gh+1 > bottom_y) - bottom_y = y+gh+1; - } - return bottom_y; -} - -STBTT_DEF void stbtt_GetBakedQuad(const stbtt_bakedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int opengl_fillrule) -{ - float d3d_bias = opengl_fillrule ? 0 : -0.5f; - float ipw = 1.0f / pw, iph = 1.0f / ph; - const stbtt_bakedchar *b = chardata + char_index; - int round_x = STBTT_ifloor((*xpos + b->xoff) + 0.5f); - int round_y = STBTT_ifloor((*ypos + b->yoff) + 0.5f); - - q->x0 = round_x + d3d_bias; - q->y0 = round_y + d3d_bias; - q->x1 = round_x + b->x1 - b->x0 + d3d_bias; - q->y1 = round_y + b->y1 - b->y0 + d3d_bias; - - q->s0 = b->x0 * ipw; - q->t0 = b->y0 * iph; - q->s1 = b->x1 * ipw; - q->t1 = b->y1 * iph; - - *xpos += b->xadvance; -} - -////////////////////////////////////////////////////////////////////////////// -// -// rectangle packing replacement routines if you don't have stb_rect_pack.h -// - -#ifndef STB_RECT_PACK_VERSION - -typedef int stbrp_coord; - -//////////////////////////////////////////////////////////////////////////////////// -// // -// // -// COMPILER WARNING ?!?!? // -// // -// // -// if you get a compile warning due to these symbols being defined more than // -// once, move #include "stb_rect_pack.h" before #include "stb_truetype.h" // -// // -//////////////////////////////////////////////////////////////////////////////////// - -typedef struct -{ - int width,height; - int x,y,bottom_y; -} stbrp_context; - -typedef struct -{ - unsigned char x; -} stbrp_node; - -struct stbrp_rect -{ - stbrp_coord x,y; - int id,w,h,was_packed; -}; - -static void stbrp_init_target(stbrp_context *con, int pw, int ph, stbrp_node *nodes, int num_nodes) -{ - con->width = pw; - con->height = ph; - con->x = 0; - con->y = 0; - con->bottom_y = 0; - STBTT__NOTUSED(nodes); - STBTT__NOTUSED(num_nodes); -} - -static void stbrp_pack_rects(stbrp_context *con, stbrp_rect *rects, int num_rects) -{ - int i; - for (i=0; i < num_rects; ++i) { - if (con->x + rects[i].w > con->width) { - con->x = 0; - con->y = con->bottom_y; - } - if (con->y + rects[i].h > con->height) - break; - rects[i].x = con->x; - rects[i].y = con->y; - rects[i].was_packed = 1; - con->x += rects[i].w; - if (con->y + rects[i].h > con->bottom_y) - con->bottom_y = con->y + rects[i].h; - } - for ( ; i < num_rects; ++i) - rects[i].was_packed = 0; -} -#endif - -////////////////////////////////////////////////////////////////////////////// -// -// bitmap baking -// -// This is SUPER-AWESOME (tm Ryan Gordon) packing using stb_rect_pack.h. If -// stb_rect_pack.h isn't available, it uses the BakeFontBitmap strategy. - -STBTT_DEF int stbtt_PackBegin(stbtt_pack_context *spc, unsigned char *pixels, int pw, int ph, int stride_in_bytes, int padding, void *alloc_context) -{ - stbrp_context *context = (stbrp_context *) STBTT_malloc(sizeof(*context) ,alloc_context); - int num_nodes = pw - padding; - stbrp_node *nodes = (stbrp_node *) STBTT_malloc(sizeof(*nodes ) * num_nodes,alloc_context); - - if (context == NULL || nodes == NULL) { - if (context != NULL) STBTT_free(context, alloc_context); - if (nodes != NULL) STBTT_free(nodes , alloc_context); - return 0; - } - - spc->user_allocator_context = alloc_context; - spc->width = pw; - spc->height = ph; - spc->pixels = pixels; - spc->pack_info = context; - spc->nodes = nodes; - spc->padding = padding; - spc->stride_in_bytes = stride_in_bytes != 0 ? stride_in_bytes : pw; - spc->h_oversample = 1; - spc->v_oversample = 1; - spc->skip_missing = 0; - - stbrp_init_target(context, pw-padding, ph-padding, nodes, num_nodes); - - if (pixels) - STBTT_memset(pixels, 0, pw*ph); // background of 0 around pixels - - return 1; -} - -STBTT_DEF void stbtt_PackEnd (stbtt_pack_context *spc) -{ - STBTT_free(spc->nodes , spc->user_allocator_context); - STBTT_free(spc->pack_info, spc->user_allocator_context); -} - -STBTT_DEF void stbtt_PackSetOversampling(stbtt_pack_context *spc, unsigned int h_oversample, unsigned int v_oversample) -{ - STBTT_assert(h_oversample <= STBTT_MAX_OVERSAMPLE); - STBTT_assert(v_oversample <= STBTT_MAX_OVERSAMPLE); - if (h_oversample <= STBTT_MAX_OVERSAMPLE) - spc->h_oversample = h_oversample; - if (v_oversample <= STBTT_MAX_OVERSAMPLE) - spc->v_oversample = v_oversample; -} - -STBTT_DEF void stbtt_PackSetSkipMissingCodepoints(stbtt_pack_context *spc, int skip) -{ - spc->skip_missing = skip; -} - -#define STBTT__OVER_MASK (STBTT_MAX_OVERSAMPLE-1) - -static void stbtt__h_prefilter(unsigned char *pixels, int w, int h, int stride_in_bytes, unsigned int kernel_width) -{ - unsigned char buffer[STBTT_MAX_OVERSAMPLE]; - int safe_w = w - kernel_width; - int j; - STBTT_memset(buffer, 0, STBTT_MAX_OVERSAMPLE); // suppress bogus warning from VS2013 -analyze - for (j=0; j < h; ++j) { - int i; - unsigned int total; - STBTT_memset(buffer, 0, kernel_width); - - total = 0; - - // make kernel_width a constant in common cases so compiler can optimize out the divide - switch (kernel_width) { - case 2: - for (i=0; i <= safe_w; ++i) { - total += pixels[i] - buffer[i & STBTT__OVER_MASK]; - buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i]; - pixels[i] = (unsigned char) (total / 2); - } - break; - case 3: - for (i=0; i <= safe_w; ++i) { - total += pixels[i] - buffer[i & STBTT__OVER_MASK]; - buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i]; - pixels[i] = (unsigned char) (total / 3); - } - break; - case 4: - for (i=0; i <= safe_w; ++i) { - total += pixels[i] - buffer[i & STBTT__OVER_MASK]; - buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i]; - pixels[i] = (unsigned char) (total / 4); - } - break; - case 5: - for (i=0; i <= safe_w; ++i) { - total += pixels[i] - buffer[i & STBTT__OVER_MASK]; - buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i]; - pixels[i] = (unsigned char) (total / 5); - } - break; - default: - for (i=0; i <= safe_w; ++i) { - total += pixels[i] - buffer[i & STBTT__OVER_MASK]; - buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i]; - pixels[i] = (unsigned char) (total / kernel_width); - } - break; - } - - for (; i < w; ++i) { - STBTT_assert(pixels[i] == 0); - total -= buffer[i & STBTT__OVER_MASK]; - pixels[i] = (unsigned char) (total / kernel_width); - } - - pixels += stride_in_bytes; - } -} - -static void stbtt__v_prefilter(unsigned char *pixels, int w, int h, int stride_in_bytes, unsigned int kernel_width) -{ - unsigned char buffer[STBTT_MAX_OVERSAMPLE]; - int safe_h = h - kernel_width; - int j; - STBTT_memset(buffer, 0, STBTT_MAX_OVERSAMPLE); // suppress bogus warning from VS2013 -analyze - for (j=0; j < w; ++j) { - int i; - unsigned int total; - STBTT_memset(buffer, 0, kernel_width); - - total = 0; - - // make kernel_width a constant in common cases so compiler can optimize out the divide - switch (kernel_width) { - case 2: - for (i=0; i <= safe_h; ++i) { - total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK]; - buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes]; - pixels[i*stride_in_bytes] = (unsigned char) (total / 2); - } - break; - case 3: - for (i=0; i <= safe_h; ++i) { - total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK]; - buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes]; - pixels[i*stride_in_bytes] = (unsigned char) (total / 3); - } - break; - case 4: - for (i=0; i <= safe_h; ++i) { - total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK]; - buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes]; - pixels[i*stride_in_bytes] = (unsigned char) (total / 4); - } - break; - case 5: - for (i=0; i <= safe_h; ++i) { - total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK]; - buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes]; - pixels[i*stride_in_bytes] = (unsigned char) (total / 5); - } - break; - default: - for (i=0; i <= safe_h; ++i) { - total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK]; - buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes]; - pixels[i*stride_in_bytes] = (unsigned char) (total / kernel_width); - } - break; - } - - for (; i < h; ++i) { - STBTT_assert(pixels[i*stride_in_bytes] == 0); - total -= buffer[i & STBTT__OVER_MASK]; - pixels[i*stride_in_bytes] = (unsigned char) (total / kernel_width); - } - - pixels += 1; - } -} - -static float stbtt__oversample_shift(int oversample) -{ - if (!oversample) - return 0.0f; - - // The prefilter is a box filter of width "oversample", - // which shifts phase by (oversample - 1)/2 pixels in - // oversampled space. We want to shift in the opposite - // direction to counter this. - return (float)-(oversample - 1) / (2.0f * (float)oversample); -} - -// rects array must be big enough to accommodate all characters in the given ranges -STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, const stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects) -{ - int i,j,k; - int missing_glyph_added = 0; - - k=0; - for (i=0; i < num_ranges; ++i) { - float fh = ranges[i].font_size; - float scale = fh > 0 ? stbtt_ScaleForPixelHeight(info, fh) : stbtt_ScaleForMappingEmToPixels(info, -fh); - ranges[i].h_oversample = (unsigned char) spc->h_oversample; - ranges[i].v_oversample = (unsigned char) spc->v_oversample; - for (j=0; j < ranges[i].num_chars; ++j) { - int x0,y0,x1,y1; - int codepoint = ranges[i].array_of_unicode_codepoints == NULL ? ranges[i].first_unicode_codepoint_in_range + j : ranges[i].array_of_unicode_codepoints[j]; - int glyph = stbtt_FindGlyphIndex(info, codepoint); - if (glyph == 0 && (spc->skip_missing || missing_glyph_added)) { - rects[k].w = rects[k].h = 0; - } else { - stbtt_GetGlyphBitmapBoxSubpixel(info,glyph, - scale * spc->h_oversample, - scale * spc->v_oversample, - 0,0, - &x0,&y0,&x1,&y1); - rects[k].w = (stbrp_coord) (x1-x0 + spc->padding + spc->h_oversample-1); - rects[k].h = (stbrp_coord) (y1-y0 + spc->padding + spc->v_oversample-1); - if (glyph == 0) - missing_glyph_added = 1; - } - ++k; - } - } - - return k; -} - -STBTT_DEF void stbtt_MakeGlyphBitmapSubpixelPrefilter(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int prefilter_x, int prefilter_y, float *sub_x, float *sub_y, int glyph) -{ - stbtt_MakeGlyphBitmapSubpixel(info, - output, - out_w - (prefilter_x - 1), - out_h - (prefilter_y - 1), - out_stride, - scale_x, - scale_y, - shift_x, - shift_y, - glyph); - - if (prefilter_x > 1) - stbtt__h_prefilter(output, out_w, out_h, out_stride, prefilter_x); - - if (prefilter_y > 1) - stbtt__v_prefilter(output, out_w, out_h, out_stride, prefilter_y); - - *sub_x = stbtt__oversample_shift(prefilter_x); - *sub_y = stbtt__oversample_shift(prefilter_y); -} - -// rects array must be big enough to accommodate all characters in the given ranges -STBTT_DEF int stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, const stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects) -{ - int i,j,k, missing_glyph = -1, return_value = 1; - - // save current values - int old_h_over = spc->h_oversample; - int old_v_over = spc->v_oversample; - - k = 0; - for (i=0; i < num_ranges; ++i) { - float fh = ranges[i].font_size; - float scale = fh > 0 ? stbtt_ScaleForPixelHeight(info, fh) : stbtt_ScaleForMappingEmToPixels(info, -fh); - float recip_h,recip_v,sub_x,sub_y; - spc->h_oversample = ranges[i].h_oversample; - spc->v_oversample = ranges[i].v_oversample; - recip_h = 1.0f / spc->h_oversample; - recip_v = 1.0f / spc->v_oversample; - sub_x = stbtt__oversample_shift(spc->h_oversample); - sub_y = stbtt__oversample_shift(spc->v_oversample); - for (j=0; j < ranges[i].num_chars; ++j) { - stbrp_rect *r = &rects[k]; - if (r->was_packed && r->w != 0 && r->h != 0) { - stbtt_packedchar *bc = &ranges[i].chardata_for_range[j]; - int advance, lsb, x0,y0,x1,y1; - int codepoint = ranges[i].array_of_unicode_codepoints == NULL ? ranges[i].first_unicode_codepoint_in_range + j : ranges[i].array_of_unicode_codepoints[j]; - int glyph = stbtt_FindGlyphIndex(info, codepoint); - stbrp_coord pad = (stbrp_coord) spc->padding; - - // pad on left and top - r->x += pad; - r->y += pad; - r->w -= pad; - r->h -= pad; - stbtt_GetGlyphHMetrics(info, glyph, &advance, &lsb); - stbtt_GetGlyphBitmapBox(info, glyph, - scale * spc->h_oversample, - scale * spc->v_oversample, - &x0,&y0,&x1,&y1); - stbtt_MakeGlyphBitmapSubpixel(info, - spc->pixels + r->x + r->y*spc->stride_in_bytes, - r->w - spc->h_oversample+1, - r->h - spc->v_oversample+1, - spc->stride_in_bytes, - scale * spc->h_oversample, - scale * spc->v_oversample, - 0,0, - glyph); - - if (spc->h_oversample > 1) - stbtt__h_prefilter(spc->pixels + r->x + r->y*spc->stride_in_bytes, - r->w, r->h, spc->stride_in_bytes, - spc->h_oversample); - - if (spc->v_oversample > 1) - stbtt__v_prefilter(spc->pixels + r->x + r->y*spc->stride_in_bytes, - r->w, r->h, spc->stride_in_bytes, - spc->v_oversample); - - bc->x0 = (stbtt_int16) r->x; - bc->y0 = (stbtt_int16) r->y; - bc->x1 = (stbtt_int16) (r->x + r->w); - bc->y1 = (stbtt_int16) (r->y + r->h); - bc->xadvance = scale * advance; - bc->xoff = (float) x0 * recip_h + sub_x; - bc->yoff = (float) y0 * recip_v + sub_y; - bc->xoff2 = (x0 + r->w) * recip_h + sub_x; - bc->yoff2 = (y0 + r->h) * recip_v + sub_y; - - if (glyph == 0) - missing_glyph = j; - } else if (spc->skip_missing) { - return_value = 0; - } else if (r->was_packed && r->w == 0 && r->h == 0 && missing_glyph >= 0) { - ranges[i].chardata_for_range[j] = ranges[i].chardata_for_range[missing_glyph]; - } else { - return_value = 0; // if any fail, report failure - } - - ++k; - } - } - - // restore original values - spc->h_oversample = old_h_over; - spc->v_oversample = old_v_over; - - return return_value; -} - -STBTT_DEF void stbtt_PackFontRangesPackRects(stbtt_pack_context *spc, stbrp_rect *rects, int num_rects) -{ - stbrp_pack_rects((stbrp_context *) spc->pack_info, rects, num_rects); -} - -STBTT_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, const unsigned char *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges) -{ - stbtt_fontinfo info; - int i,j,n, return_value = 1; - //stbrp_context *context = (stbrp_context *) spc->pack_info; - stbrp_rect *rects; - - // flag all characters as NOT packed - for (i=0; i < num_ranges; ++i) - for (j=0; j < ranges[i].num_chars; ++j) - ranges[i].chardata_for_range[j].x0 = - ranges[i].chardata_for_range[j].y0 = - ranges[i].chardata_for_range[j].x1 = - ranges[i].chardata_for_range[j].y1 = 0; - - n = 0; - for (i=0; i < num_ranges; ++i) - n += ranges[i].num_chars; - - rects = (stbrp_rect *) STBTT_malloc(sizeof(*rects) * n, spc->user_allocator_context); - if (rects == NULL) - return 0; - - info.userdata = spc->user_allocator_context; - stbtt_InitFont(&info, fontdata, stbtt_GetFontOffsetForIndex(fontdata,font_index)); - - n = stbtt_PackFontRangesGatherRects(spc, &info, ranges, num_ranges, rects); - - stbtt_PackFontRangesPackRects(spc, rects, n); - - return_value = stbtt_PackFontRangesRenderIntoRects(spc, &info, ranges, num_ranges, rects); - - STBTT_free(rects, spc->user_allocator_context); - return return_value; -} - -STBTT_DEF int stbtt_PackFontRange(stbtt_pack_context *spc, const unsigned char *fontdata, int font_index, float font_size, - int first_unicode_codepoint_in_range, int num_chars_in_range, stbtt_packedchar *chardata_for_range) -{ - stbtt_pack_range range; - range.first_unicode_codepoint_in_range = first_unicode_codepoint_in_range; - range.array_of_unicode_codepoints = NULL; - range.num_chars = num_chars_in_range; - range.chardata_for_range = chardata_for_range; - range.font_size = font_size; - return stbtt_PackFontRanges(spc, fontdata, font_index, &range, 1); -} - -STBTT_DEF void stbtt_GetScaledFontVMetrics(const unsigned char *fontdata, int index, float size, float *ascent, float *descent, float *lineGap) -{ - int i_ascent, i_descent, i_lineGap; - float scale; - stbtt_fontinfo info; - stbtt_InitFont(&info, fontdata, stbtt_GetFontOffsetForIndex(fontdata, index)); - scale = size > 0 ? stbtt_ScaleForPixelHeight(&info, size) : stbtt_ScaleForMappingEmToPixels(&info, -size); - stbtt_GetFontVMetrics(&info, &i_ascent, &i_descent, &i_lineGap); - *ascent = (float) i_ascent * scale; - *descent = (float) i_descent * scale; - *lineGap = (float) i_lineGap * scale; -} - -STBTT_DEF void stbtt_GetPackedQuad(const stbtt_packedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int align_to_integer) -{ - float ipw = 1.0f / pw, iph = 1.0f / ph; - const stbtt_packedchar *b = chardata + char_index; - - if (align_to_integer) { - float x = (float) STBTT_ifloor((*xpos + b->xoff) + 0.5f); - float y = (float) STBTT_ifloor((*ypos + b->yoff) + 0.5f); - q->x0 = x; - q->y0 = y; - q->x1 = x + b->xoff2 - b->xoff; - q->y1 = y + b->yoff2 - b->yoff; - } else { - q->x0 = *xpos + b->xoff; - q->y0 = *ypos + b->yoff; - q->x1 = *xpos + b->xoff2; - q->y1 = *ypos + b->yoff2; - } - - q->s0 = b->x0 * ipw; - q->t0 = b->y0 * iph; - q->s1 = b->x1 * ipw; - q->t1 = b->y1 * iph; - - *xpos += b->xadvance; -} - -////////////////////////////////////////////////////////////////////////////// -// -// sdf computation -// - -#define STBTT_min(a,b) ((a) < (b) ? (a) : (b)) -#define STBTT_max(a,b) ((a) < (b) ? (b) : (a)) - -static int stbtt__ray_intersect_bezier(float orig[2], float ray[2], float q0[2], float q1[2], float q2[2], float hits[2][2]) -{ - float q0perp = q0[1]*ray[0] - q0[0]*ray[1]; - float q1perp = q1[1]*ray[0] - q1[0]*ray[1]; - float q2perp = q2[1]*ray[0] - q2[0]*ray[1]; - float roperp = orig[1]*ray[0] - orig[0]*ray[1]; - - float a = q0perp - 2*q1perp + q2perp; - float b = q1perp - q0perp; - float c = q0perp - roperp; - - float s0 = 0., s1 = 0.; - int num_s = 0; - - if (a != 0.0) { - float discr = b*b - a*c; - if (discr > 0.0) { - float rcpna = -1 / a; - float d = (float) STBTT_sqrt(discr); - s0 = (b+d) * rcpna; - s1 = (b-d) * rcpna; - if (s0 >= 0.0 && s0 <= 1.0) - num_s = 1; - if (d > 0.0 && s1 >= 0.0 && s1 <= 1.0) { - if (num_s == 0) s0 = s1; - ++num_s; - } - } - } else { - // 2*b*s + c = 0 - // s = -c / (2*b) - s0 = c / (-2 * b); - if (s0 >= 0.0 && s0 <= 1.0) - num_s = 1; - } - - if (num_s == 0) - return 0; - else { - float rcp_len2 = 1 / (ray[0]*ray[0] + ray[1]*ray[1]); - float rayn_x = ray[0] * rcp_len2, rayn_y = ray[1] * rcp_len2; - - float q0d = q0[0]*rayn_x + q0[1]*rayn_y; - float q1d = q1[0]*rayn_x + q1[1]*rayn_y; - float q2d = q2[0]*rayn_x + q2[1]*rayn_y; - float rod = orig[0]*rayn_x + orig[1]*rayn_y; - - float q10d = q1d - q0d; - float q20d = q2d - q0d; - float q0rd = q0d - rod; - - hits[0][0] = q0rd + s0*(2.0f - 2.0f*s0)*q10d + s0*s0*q20d; - hits[0][1] = a*s0+b; - - if (num_s > 1) { - hits[1][0] = q0rd + s1*(2.0f - 2.0f*s1)*q10d + s1*s1*q20d; - hits[1][1] = a*s1+b; - return 2; - } else { - return 1; - } - } -} - -static int equal(float *a, float *b) -{ - return (a[0] == b[0] && a[1] == b[1]); -} - -static int stbtt__compute_crossings_x(float x, float y, int nverts, stbtt_vertex *verts) -{ - int i; - float orig[2], ray[2] = { 1, 0 }; - float y_frac; - int winding = 0; - - // make sure y never passes through a vertex of the shape - y_frac = (float) STBTT_fmod(y, 1.0f); - if (y_frac < 0.01f) - y += 0.01f; - else if (y_frac > 0.99f) - y -= 0.01f; - - orig[0] = x; - orig[1] = y; - - // test a ray from (-infinity,y) to (x,y) - for (i=0; i < nverts; ++i) { - if (verts[i].type == STBTT_vline) { - int x0 = (int) verts[i-1].x, y0 = (int) verts[i-1].y; - int x1 = (int) verts[i ].x, y1 = (int) verts[i ].y; - if (y > STBTT_min(y0,y1) && y < STBTT_max(y0,y1) && x > STBTT_min(x0,x1)) { - float x_inter = (y - y0) / (y1 - y0) * (x1-x0) + x0; - if (x_inter < x) - winding += (y0 < y1) ? 1 : -1; - } - } - if (verts[i].type == STBTT_vcurve) { - int x0 = (int) verts[i-1].x , y0 = (int) verts[i-1].y ; - int x1 = (int) verts[i ].cx, y1 = (int) verts[i ].cy; - int x2 = (int) verts[i ].x , y2 = (int) verts[i ].y ; - int ax = STBTT_min(x0,STBTT_min(x1,x2)), ay = STBTT_min(y0,STBTT_min(y1,y2)); - int by = STBTT_max(y0,STBTT_max(y1,y2)); - if (y > ay && y < by && x > ax) { - float q0[2],q1[2],q2[2]; - float hits[2][2]; - q0[0] = (float)x0; - q0[1] = (float)y0; - q1[0] = (float)x1; - q1[1] = (float)y1; - q2[0] = (float)x2; - q2[1] = (float)y2; - if (equal(q0,q1) || equal(q1,q2)) { - x0 = (int)verts[i-1].x; - y0 = (int)verts[i-1].y; - x1 = (int)verts[i ].x; - y1 = (int)verts[i ].y; - if (y > STBTT_min(y0,y1) && y < STBTT_max(y0,y1) && x > STBTT_min(x0,x1)) { - float x_inter = (y - y0) / (y1 - y0) * (x1-x0) + x0; - if (x_inter < x) - winding += (y0 < y1) ? 1 : -1; - } - } else { - int num_hits = stbtt__ray_intersect_bezier(orig, ray, q0, q1, q2, hits); - if (num_hits >= 1) - if (hits[0][0] < 0) - winding += (hits[0][1] < 0 ? -1 : 1); - if (num_hits >= 2) - if (hits[1][0] < 0) - winding += (hits[1][1] < 0 ? -1 : 1); - } - } - } - } - return winding; -} - -static float stbtt__cuberoot( float x ) -{ - if (x<0) - return -(float) STBTT_pow(-x,1.0f/3.0f); - else - return (float) STBTT_pow( x,1.0f/3.0f); -} - -// x^3 + a*x^2 + b*x + c = 0 -static int stbtt__solve_cubic(float a, float b, float c, float* r) -{ - float s = -a / 3; - float p = b - a*a / 3; - float q = a * (2*a*a - 9*b) / 27 + c; - float p3 = p*p*p; - float d = q*q + 4*p3 / 27; - if (d >= 0) { - float z = (float) STBTT_sqrt(d); - float u = (-q + z) / 2; - float v = (-q - z) / 2; - u = stbtt__cuberoot(u); - v = stbtt__cuberoot(v); - r[0] = s + u + v; - return 1; - } else { - float u = (float) STBTT_sqrt(-p/3); - float v = (float) STBTT_acos(-STBTT_sqrt(-27/p3) * q / 2) / 3; // p3 must be negative, since d is negative - float m = (float) STBTT_cos(v); - float n = (float) STBTT_cos(v-3.141592/2)*1.732050808f; - r[0] = s + u * 2 * m; - r[1] = s - u * (m + n); - r[2] = s - u * (m - n); - - //STBTT_assert( STBTT_fabs(((r[0]+a)*r[0]+b)*r[0]+c) < 0.05f); // these asserts may not be safe at all scales, though they're in bezier t parameter units so maybe? - //STBTT_assert( STBTT_fabs(((r[1]+a)*r[1]+b)*r[1]+c) < 0.05f); - //STBTT_assert( STBTT_fabs(((r[2]+a)*r[2]+b)*r[2]+c) < 0.05f); - return 3; - } -} - -STBTT_DEF unsigned char * stbtt_GetGlyphSDF(const stbtt_fontinfo *info, float scale, int glyph, int padding, unsigned char onedge_value, float pixel_dist_scale, int *width, int *height, int *xoff, int *yoff) -{ - float scale_x = scale, scale_y = scale; - int ix0,iy0,ix1,iy1; - int w,h; - unsigned char *data; - - if (scale == 0) return NULL; - - stbtt_GetGlyphBitmapBoxSubpixel(info, glyph, scale, scale, 0.0f,0.0f, &ix0,&iy0,&ix1,&iy1); - - // if empty, return NULL - if (ix0 == ix1 || iy0 == iy1) - return NULL; - - ix0 -= padding; - iy0 -= padding; - ix1 += padding; - iy1 += padding; - - w = (ix1 - ix0); - h = (iy1 - iy0); - - if (width ) *width = w; - if (height) *height = h; - if (xoff ) *xoff = ix0; - if (yoff ) *yoff = iy0; - - // invert for y-downwards bitmaps - scale_y = -scale_y; - - { - int x,y,i,j; - float *precompute; - stbtt_vertex *verts; - int num_verts = stbtt_GetGlyphShape(info, glyph, &verts); - data = (unsigned char *) STBTT_malloc(w * h, info->userdata); - precompute = (float *) STBTT_malloc(num_verts * sizeof(float), info->userdata); - - for (i=0,j=num_verts-1; i < num_verts; j=i++) { - if (verts[i].type == STBTT_vline) { - float x0 = verts[i].x*scale_x, y0 = verts[i].y*scale_y; - float x1 = verts[j].x*scale_x, y1 = verts[j].y*scale_y; - float dist = (float) STBTT_sqrt((x1-x0)*(x1-x0) + (y1-y0)*(y1-y0)); - precompute[i] = (dist == 0) ? 0.0f : 1.0f / dist; - } else if (verts[i].type == STBTT_vcurve) { - float x2 = verts[j].x *scale_x, y2 = verts[j].y *scale_y; - float x1 = verts[i].cx*scale_x, y1 = verts[i].cy*scale_y; - float x0 = verts[i].x *scale_x, y0 = verts[i].y *scale_y; - float bx = x0 - 2*x1 + x2, by = y0 - 2*y1 + y2; - float len2 = bx*bx + by*by; - if (len2 != 0.0f) - precompute[i] = 1.0f / (bx*bx + by*by); - else - precompute[i] = 0.0f; - } else - precompute[i] = 0.0f; - } - - for (y=iy0; y < iy1; ++y) { - for (x=ix0; x < ix1; ++x) { - float val; - float min_dist = 999999.0f; - float sx = (float) x + 0.5f; - float sy = (float) y + 0.5f; - float x_gspace = (sx / scale_x); - float y_gspace = (sy / scale_y); - - int winding = stbtt__compute_crossings_x(x_gspace, y_gspace, num_verts, verts); // @OPTIMIZE: this could just be a rasterization, but needs to be line vs. non-tesselated curves so a new path - - for (i=0; i < num_verts; ++i) { - float x0 = verts[i].x*scale_x, y0 = verts[i].y*scale_y; - - if (verts[i].type == STBTT_vline && precompute[i] != 0.0f) { - float x1 = verts[i-1].x*scale_x, y1 = verts[i-1].y*scale_y; - - float dist,dist2 = (x0-sx)*(x0-sx) + (y0-sy)*(y0-sy); - if (dist2 < min_dist*min_dist) - min_dist = (float) STBTT_sqrt(dist2); - - // coarse culling against bbox - //if (sx > STBTT_min(x0,x1)-min_dist && sx < STBTT_max(x0,x1)+min_dist && - // sy > STBTT_min(y0,y1)-min_dist && sy < STBTT_max(y0,y1)+min_dist) - dist = (float) STBTT_fabs((x1-x0)*(y0-sy) - (y1-y0)*(x0-sx)) * precompute[i]; - STBTT_assert(i != 0); - if (dist < min_dist) { - // check position along line - // x' = x0 + t*(x1-x0), y' = y0 + t*(y1-y0) - // minimize (x'-sx)*(x'-sx)+(y'-sy)*(y'-sy) - float dx = x1-x0, dy = y1-y0; - float px = x0-sx, py = y0-sy; - // minimize (px+t*dx)^2 + (py+t*dy)^2 = px*px + 2*px*dx*t + t^2*dx*dx + py*py + 2*py*dy*t + t^2*dy*dy - // derivative: 2*px*dx + 2*py*dy + (2*dx*dx+2*dy*dy)*t, set to 0 and solve - float t = -(px*dx + py*dy) / (dx*dx + dy*dy); - if (t >= 0.0f && t <= 1.0f) - min_dist = dist; - } - } else if (verts[i].type == STBTT_vcurve) { - float x2 = verts[i-1].x *scale_x, y2 = verts[i-1].y *scale_y; - float x1 = verts[i ].cx*scale_x, y1 = verts[i ].cy*scale_y; - float box_x0 = STBTT_min(STBTT_min(x0,x1),x2); - float box_y0 = STBTT_min(STBTT_min(y0,y1),y2); - float box_x1 = STBTT_max(STBTT_max(x0,x1),x2); - float box_y1 = STBTT_max(STBTT_max(y0,y1),y2); - // coarse culling against bbox to avoid computing cubic unnecessarily - if (sx > box_x0-min_dist && sx < box_x1+min_dist && sy > box_y0-min_dist && sy < box_y1+min_dist) { - int num=0; - float ax = x1-x0, ay = y1-y0; - float bx = x0 - 2*x1 + x2, by = y0 - 2*y1 + y2; - float mx = x0 - sx, my = y0 - sy; - float res[3] = {0.f,0.f,0.f}; - float px,py,t,it,dist2; - float a_inv = precompute[i]; - if (a_inv == 0.0) { // if a_inv is 0, it's 2nd degree so use quadratic formula - float a = 3*(ax*bx + ay*by); - float b = 2*(ax*ax + ay*ay) + (mx*bx+my*by); - float c = mx*ax+my*ay; - if (a == 0.0) { // if a is 0, it's linear - if (b != 0.0) { - res[num++] = -c/b; - } - } else { - float discriminant = b*b - 4*a*c; - if (discriminant < 0) - num = 0; - else { - float root = (float) STBTT_sqrt(discriminant); - res[0] = (-b - root)/(2*a); - res[1] = (-b + root)/(2*a); - num = 2; // don't bother distinguishing 1-solution case, as code below will still work - } - } - } else { - float b = 3*(ax*bx + ay*by) * a_inv; // could precompute this as it doesn't depend on sample point - float c = (2*(ax*ax + ay*ay) + (mx*bx+my*by)) * a_inv; - float d = (mx*ax+my*ay) * a_inv; - num = stbtt__solve_cubic(b, c, d, res); - } - dist2 = (x0-sx)*(x0-sx) + (y0-sy)*(y0-sy); - if (dist2 < min_dist*min_dist) - min_dist = (float) STBTT_sqrt(dist2); - - if (num >= 1 && res[0] >= 0.0f && res[0] <= 1.0f) { - t = res[0], it = 1.0f - t; - px = it*it*x0 + 2*t*it*x1 + t*t*x2; - py = it*it*y0 + 2*t*it*y1 + t*t*y2; - dist2 = (px-sx)*(px-sx) + (py-sy)*(py-sy); - if (dist2 < min_dist * min_dist) - min_dist = (float) STBTT_sqrt(dist2); - } - if (num >= 2 && res[1] >= 0.0f && res[1] <= 1.0f) { - t = res[1], it = 1.0f - t; - px = it*it*x0 + 2*t*it*x1 + t*t*x2; - py = it*it*y0 + 2*t*it*y1 + t*t*y2; - dist2 = (px-sx)*(px-sx) + (py-sy)*(py-sy); - if (dist2 < min_dist * min_dist) - min_dist = (float) STBTT_sqrt(dist2); - } - if (num >= 3 && res[2] >= 0.0f && res[2] <= 1.0f) { - t = res[2], it = 1.0f - t; - px = it*it*x0 + 2*t*it*x1 + t*t*x2; - py = it*it*y0 + 2*t*it*y1 + t*t*y2; - dist2 = (px-sx)*(px-sx) + (py-sy)*(py-sy); - if (dist2 < min_dist * min_dist) - min_dist = (float) STBTT_sqrt(dist2); - } - } - } - } - if (winding == 0) - min_dist = -min_dist; // if outside the shape, value is negative - val = onedge_value + pixel_dist_scale * min_dist; - if (val < 0) - val = 0; - else if (val > 255) - val = 255; - data[(y-iy0)*w+(x-ix0)] = (unsigned char) val; - } - } - STBTT_free(precompute, info->userdata); - STBTT_free(verts, info->userdata); - } - return data; -} - -STBTT_DEF unsigned char * stbtt_GetCodepointSDF(const stbtt_fontinfo *info, float scale, int codepoint, int padding, unsigned char onedge_value, float pixel_dist_scale, int *width, int *height, int *xoff, int *yoff) -{ - return stbtt_GetGlyphSDF(info, scale, stbtt_FindGlyphIndex(info, codepoint), padding, onedge_value, pixel_dist_scale, width, height, xoff, yoff); -} - -STBTT_DEF void stbtt_FreeSDF(unsigned char *bitmap, void *userdata) -{ - STBTT_free(bitmap, userdata); -} - -////////////////////////////////////////////////////////////////////////////// -// -// font name matching -- recommended not to use this -// - -// check if a utf8 string contains a prefix which is the utf16 string; if so return length of matching utf8 string -static stbtt_int32 stbtt__CompareUTF8toUTF16_bigendian_prefix(stbtt_uint8 *s1, stbtt_int32 len1, stbtt_uint8 *s2, stbtt_int32 len2) -{ - stbtt_int32 i=0; - - // convert utf16 to utf8 and compare the results while converting - while (len2) { - stbtt_uint16 ch = s2[0]*256 + s2[1]; - if (ch < 0x80) { - if (i >= len1) return -1; - if (s1[i++] != ch) return -1; - } else if (ch < 0x800) { - if (i+1 >= len1) return -1; - if (s1[i++] != 0xc0 + (ch >> 6)) return -1; - if (s1[i++] != 0x80 + (ch & 0x3f)) return -1; - } else if (ch >= 0xd800 && ch < 0xdc00) { - stbtt_uint32 c; - stbtt_uint16 ch2 = s2[2]*256 + s2[3]; - if (i+3 >= len1) return -1; - c = ((ch - 0xd800) << 10) + (ch2 - 0xdc00) + 0x10000; - if (s1[i++] != 0xf0 + (c >> 18)) return -1; - if (s1[i++] != 0x80 + ((c >> 12) & 0x3f)) return -1; - if (s1[i++] != 0x80 + ((c >> 6) & 0x3f)) return -1; - if (s1[i++] != 0x80 + ((c ) & 0x3f)) return -1; - s2 += 2; // plus another 2 below - len2 -= 2; - } else if (ch >= 0xdc00 && ch < 0xe000) { - return -1; - } else { - if (i+2 >= len1) return -1; - if (s1[i++] != 0xe0 + (ch >> 12)) return -1; - if (s1[i++] != 0x80 + ((ch >> 6) & 0x3f)) return -1; - if (s1[i++] != 0x80 + ((ch ) & 0x3f)) return -1; - } - s2 += 2; - len2 -= 2; - } - return i; -} - -static int stbtt_CompareUTF8toUTF16_bigendian_internal(char *s1, int len1, char *s2, int len2) -{ - return len1 == stbtt__CompareUTF8toUTF16_bigendian_prefix((stbtt_uint8*) s1, len1, (stbtt_uint8*) s2, len2); -} - -// returns results in whatever encoding you request... but note that 2-byte encodings -// will be BIG-ENDIAN... use stbtt_CompareUTF8toUTF16_bigendian() to compare -STBTT_DEF const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID) -{ - stbtt_int32 i,count,stringOffset; - stbtt_uint8 *fc = font->data; - stbtt_uint32 offset = font->fontstart; - stbtt_uint32 nm = stbtt__find_table(fc, offset, "name"); - if (!nm) return NULL; - - count = ttUSHORT(fc+nm+2); - stringOffset = nm + ttUSHORT(fc+nm+4); - for (i=0; i < count; ++i) { - stbtt_uint32 loc = nm + 6 + 12 * i; - if (platformID == ttUSHORT(fc+loc+0) && encodingID == ttUSHORT(fc+loc+2) - && languageID == ttUSHORT(fc+loc+4) && nameID == ttUSHORT(fc+loc+6)) { - *length = ttUSHORT(fc+loc+8); - return (const char *) (fc+stringOffset+ttUSHORT(fc+loc+10)); - } - } - return NULL; -} - -static int stbtt__matchpair(stbtt_uint8 *fc, stbtt_uint32 nm, stbtt_uint8 *name, stbtt_int32 nlen, stbtt_int32 target_id, stbtt_int32 next_id) -{ - stbtt_int32 i; - stbtt_int32 count = ttUSHORT(fc+nm+2); - stbtt_int32 stringOffset = nm + ttUSHORT(fc+nm+4); - - for (i=0; i < count; ++i) { - stbtt_uint32 loc = nm + 6 + 12 * i; - stbtt_int32 id = ttUSHORT(fc+loc+6); - if (id == target_id) { - // find the encoding - stbtt_int32 platform = ttUSHORT(fc+loc+0), encoding = ttUSHORT(fc+loc+2), language = ttUSHORT(fc+loc+4); - - // is this a Unicode encoding? - if (platform == 0 || (platform == 3 && encoding == 1) || (platform == 3 && encoding == 10)) { - stbtt_int32 slen = ttUSHORT(fc+loc+8); - stbtt_int32 off = ttUSHORT(fc+loc+10); - - // check if there's a prefix match - stbtt_int32 matchlen = stbtt__CompareUTF8toUTF16_bigendian_prefix(name, nlen, fc+stringOffset+off,slen); - if (matchlen >= 0) { - // check for target_id+1 immediately following, with same encoding & language - if (i+1 < count && ttUSHORT(fc+loc+12+6) == next_id && ttUSHORT(fc+loc+12) == platform && ttUSHORT(fc+loc+12+2) == encoding && ttUSHORT(fc+loc+12+4) == language) { - slen = ttUSHORT(fc+loc+12+8); - off = ttUSHORT(fc+loc+12+10); - if (slen == 0) { - if (matchlen == nlen) - return 1; - } else if (matchlen < nlen && name[matchlen] == ' ') { - ++matchlen; - if (stbtt_CompareUTF8toUTF16_bigendian_internal((char*) (name+matchlen), nlen-matchlen, (char*)(fc+stringOffset+off),slen)) - return 1; - } - } else { - // if nothing immediately following - if (matchlen == nlen) - return 1; - } - } - } - - // @TODO handle other encodings - } - } - return 0; -} - -static int stbtt__matches(stbtt_uint8 *fc, stbtt_uint32 offset, stbtt_uint8 *name, stbtt_int32 flags) -{ - stbtt_int32 nlen = (stbtt_int32) STBTT_strlen((char *) name); - stbtt_uint32 nm,hd; - if (!stbtt__isfont(fc+offset)) return 0; - - // check italics/bold/underline flags in macStyle... - if (flags) { - hd = stbtt__find_table(fc, offset, "head"); - if ((ttUSHORT(fc+hd+44) & 7) != (flags & 7)) return 0; - } - - nm = stbtt__find_table(fc, offset, "name"); - if (!nm) return 0; - - if (flags) { - // if we checked the macStyle flags, then just check the family and ignore the subfamily - if (stbtt__matchpair(fc, nm, name, nlen, 16, -1)) return 1; - if (stbtt__matchpair(fc, nm, name, nlen, 1, -1)) return 1; - if (stbtt__matchpair(fc, nm, name, nlen, 3, -1)) return 1; - } else { - if (stbtt__matchpair(fc, nm, name, nlen, 16, 17)) return 1; - if (stbtt__matchpair(fc, nm, name, nlen, 1, 2)) return 1; - if (stbtt__matchpair(fc, nm, name, nlen, 3, -1)) return 1; - } - - return 0; -} - -static int stbtt_FindMatchingFont_internal(unsigned char *font_collection, char *name_utf8, stbtt_int32 flags) -{ - stbtt_int32 i; - for (i=0;;++i) { - stbtt_int32 off = stbtt_GetFontOffsetForIndex(font_collection, i); - if (off < 0) return off; - if (stbtt__matches((stbtt_uint8 *) font_collection, off, (stbtt_uint8*) name_utf8, flags)) - return off; - } -} - -#if defined(__GNUC__) || defined(__clang__) -#pragma GCC diagnostic push -#pragma GCC diagnostic ignored "-Wcast-qual" -#endif - -STBTT_DEF int stbtt_BakeFontBitmap(const unsigned char *data, int offset, - float pixel_height, unsigned char *pixels, int pw, int ph, - int first_char, int num_chars, stbtt_bakedchar *chardata) -{ - return stbtt_BakeFontBitmap_internal((unsigned char *) data, offset, pixel_height, pixels, pw, ph, first_char, num_chars, chardata); -} - -STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index) -{ - return stbtt_GetFontOffsetForIndex_internal((unsigned char *) data, index); -} - -STBTT_DEF int stbtt_GetNumberOfFonts(const unsigned char *data) -{ - return stbtt_GetNumberOfFonts_internal((unsigned char *) data); -} - -STBTT_DEF int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data, int offset) -{ - return stbtt_InitFont_internal(info, (unsigned char *) data, offset); -} - -STBTT_DEF int stbtt_FindMatchingFont(const unsigned char *fontdata, const char *name, int flags) -{ - return stbtt_FindMatchingFont_internal((unsigned char *) fontdata, (char *) name, flags); -} - -STBTT_DEF int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2) -{ - return stbtt_CompareUTF8toUTF16_bigendian_internal((char *) s1, len1, (char *) s2, len2); -} - -#if defined(__GNUC__) || defined(__clang__) -#pragma GCC diagnostic pop -#endif - -#endif // STB_TRUETYPE_IMPLEMENTATION - - -// FULL VERSION HISTORY -// -// 1.25 (2021-07-11) many fixes -// 1.24 (2020-02-05) fix warning -// 1.23 (2020-02-02) query SVG data for glyphs; query whole kerning table (but only kern not GPOS) -// 1.22 (2019-08-11) minimize missing-glyph duplication; fix kerning if both 'GPOS' and 'kern' are defined -// 1.21 (2019-02-25) fix warning -// 1.20 (2019-02-07) PackFontRange skips missing codepoints; GetScaleFontVMetrics() -// 1.19 (2018-02-11) OpenType GPOS kerning (horizontal only), STBTT_fmod -// 1.18 (2018-01-29) add missing function -// 1.17 (2017-07-23) make more arguments const; doc fix -// 1.16 (2017-07-12) SDF support -// 1.15 (2017-03-03) make more arguments const -// 1.14 (2017-01-16) num-fonts-in-TTC function -// 1.13 (2017-01-02) support OpenType fonts, certain Apple fonts -// 1.12 (2016-10-25) suppress warnings about casting away const with -Wcast-qual -// 1.11 (2016-04-02) fix unused-variable warning -// 1.10 (2016-04-02) allow user-defined fabs() replacement -// fix memory leak if fontsize=0.0 -// fix warning from duplicate typedef -// 1.09 (2016-01-16) warning fix; avoid crash on outofmem; use alloc userdata for PackFontRanges -// 1.08 (2015-09-13) document stbtt_Rasterize(); fixes for vertical & horizontal edges -// 1.07 (2015-08-01) allow PackFontRanges to accept arrays of sparse codepoints; -// allow PackFontRanges to pack and render in separate phases; -// fix stbtt_GetFontOFfsetForIndex (never worked for non-0 input?); -// fixed an assert() bug in the new rasterizer -// replace assert() with STBTT_assert() in new rasterizer -// 1.06 (2015-07-14) performance improvements (~35% faster on x86 and x64 on test machine) -// also more precise AA rasterizer, except if shapes overlap -// remove need for STBTT_sort -// 1.05 (2015-04-15) fix misplaced definitions for STBTT_STATIC -// 1.04 (2015-04-15) typo in example -// 1.03 (2015-04-12) STBTT_STATIC, fix memory leak in new packing, various fixes -// 1.02 (2014-12-10) fix various warnings & compile issues w/ stb_rect_pack, C++ -// 1.01 (2014-12-08) fix subpixel position when oversampling to exactly match -// non-oversampled; STBTT_POINT_SIZE for packed case only -// 1.00 (2014-12-06) add new PackBegin etc. API, w/ support for oversampling -// 0.99 (2014-09-18) fix multiple bugs with subpixel rendering (ryg) -// 0.9 (2014-08-07) support certain mac/iOS fonts without an MS platformID -// 0.8b (2014-07-07) fix a warning -// 0.8 (2014-05-25) fix a few more warnings -// 0.7 (2013-09-25) bugfix: subpixel glyph bug fixed in 0.5 had come back -// 0.6c (2012-07-24) improve documentation -// 0.6b (2012-07-20) fix a few more warnings -// 0.6 (2012-07-17) fix warnings; added stbtt_ScaleForMappingEmToPixels, -// stbtt_GetFontBoundingBox, stbtt_IsGlyphEmpty -// 0.5 (2011-12-09) bugfixes: -// subpixel glyph renderer computed wrong bounding box -// first vertex of shape can be off-curve (FreeSans) -// 0.4b (2011-12-03) fixed an error in the font baking example -// 0.4 (2011-12-01) kerning, subpixel rendering (tor) -// bugfixes for: -// codepoint-to-glyph conversion using table fmt=12 -// codepoint-to-glyph conversion using table fmt=4 -// stbtt_GetBakedQuad with non-square texture (Zer) -// updated Hello World! sample to use kerning and subpixel -// fixed some warnings -// 0.3 (2009-06-24) cmap fmt=12, compound shapes (MM) -// userdata, malloc-from-userdata, non-zero fill (stb) -// 0.2 (2009-03-11) Fix unsigned/signed char warnings -// 0.1 (2009-03-09) First public release -// - -/* ------------------------------------------------------------------------------- -This software is available under 2 licenses -- choose whichever you prefer. ------------------------------------------------------------------------------- -ALTERNATIVE A - MIT License -Copyright (c) 2017 Sean Barrett -Permission is hereby granted, free of charge, to any person obtaining a copy of -this software and associated documentation files (the "Software"), to deal in -the Software without restriction, including without limitation the rights to -use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies -of the Software, and to permit persons to whom the Software is furnished to do -so, subject to the following conditions: -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. ------------------------------------------------------------------------------- -ALTERNATIVE B - Public Domain (www.unlicense.org) -This is free and unencumbered software released into the public domain. -Anyone is free to copy, modify, publish, use, compile, sell, or distribute this -software, either in source code form or as a compiled binary, for any purpose, -commercial or non-commercial, and by any means. -In jurisdictions that recognize copyright laws, the author or authors of this -software dedicate any and all copyright interest in the software to the public -domain. We make this dedication for the benefit of the public at large and to -the detriment of our heirs and successors. We intend this dedication to be an -overt act of relinquishment in perpetuity of all present and future rights to -this software under copyright law. -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN -ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION -WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ------------------------------------------------------------------------------- -*/ \ No newline at end of file diff --git a/lib/stb_truetype.onyx b/lib/stb_truetype.onyx deleted file mode 100644 index a2be6c4..0000000 --- a/lib/stb_truetype.onyx +++ /dev/null @@ -1,28 +0,0 @@ -package stb_truetype - -#library "stb_truetype" - -stbtt_pack_context :: struct #size 64 {} - -stbtt_packedchar :: struct #size 28 { - x0, y0, x1, y1: u16; - xoff, yoff, xadvance: f32; - xoff2, yoff2: f32; -} - -stbtt_aligned_quad :: struct #size 32 { - x0, y0, s0, t0 : f32; - x1, y1, s1, t1 : f32; -} - -#foreign "stb_truetype" { - stbtt_PackBegin :: (ctx: ^stbtt_pack_context, pixels: ^u8, width, height, stride_in_bytes, padding: i32) -> i32 --- - stbtt_PackEnd :: (ctx: ^stbtt_pack_context) -> void --- - stbtt_PackFontRange :: (ctx: ^stbtt_pack_context, fontdata: ^u8, font_index: i32, font_size: f32, first_unicode_char_in_range: i32, num_chars_in_range: i32, chardata_for_range: ^stbtt_packedchar) -> i32 --- - stbtt_PackSetOversampling :: (ctx: ^stbtt_pack_context, h_oversample, v_oversample: i32) -> void --- - - stbtt_GetPackedQuad :: (chardata: ^stbtt_packedchar, pw, ph: i32, char_index: i32, xpos, ypos: ^f32, quad: ^stbtt_aligned_quad, align_to_integer: bool) -> void --- -} - -#export "stbtt_heap_alloc" calloc -#export "stbtt_heap_free" cfree diff --git a/run_tree/lib/onyx_opengles.so b/run_tree/lib/onyx_opengles.so index 2b34641..6015b67 100755 Binary files a/run_tree/lib/onyx_opengles.so and b/run_tree/lib/onyx_opengles.so differ diff --git a/run_tree/run.sh b/run_tree/run.sh index ad1b01f..25f21b1 100755 --- a/run_tree/run.sh +++ b/run_tree/run.sh @@ -1,2 +1,2 @@ -onyx -V build -I ../src -o game.wasm $@ && onyxrun game.wasm +onyx -V build -I ../src/client -o game.wasm $@ && onyxrun game.wasm diff --git a/server/run.sh b/server/run.sh new file mode 100755 index 0000000..8d31c57 --- /dev/null +++ b/server/run.sh @@ -0,0 +1,3 @@ +#!/bin/sh + +onyx -V build -I ../src/server -o server.wasm $@ && onyxrun server.wasm \ No newline at end of file diff --git a/src/build.onyx b/src/build.onyx deleted file mode 100644 index daea60c..0000000 --- a/src/build.onyx +++ /dev/null @@ -1,25 +0,0 @@ -#load "core/std" - -#local runtime :: package runtime -#load_path runtime.vars.ONYX_MODULE_DIR -#load_path "./../src" -#load_path "./../lib" -#library_path "./lib" - -// Primary source files -#load "config" -#load "main" - -#load_all "./gfx" -#load_all "./net" -#load_all "./utils" -#load_all "./world" - -// Onyx library code -#load "stb_truetype" -#load "stb_image" - -// Onyx modules -#load "glfw3/module" -#load "opengles/module" -#load "perlin/module" diff --git a/src/client/build.onyx b/src/client/build.onyx new file mode 100644 index 0000000..c8e2745 --- /dev/null +++ b/src/client/build.onyx @@ -0,0 +1,22 @@ +#load "core/std" + +#local runtime :: package runtime +#load_path runtime.vars.ONYX_MODULE_DIR +#load_path "./../src/client" +#library_path "./lib" + +// Primary source files +#load "./../src/config" +#load "main" + +#load_all "./gfx" +#load_all "./utils" +#load_all "./world" + +// Onyx modules +#load "glfw3/module" +#load "opengles/module" +#load "perlin/module" +#load "stb_image/module" +#load "stb_truetype/module" +#load "onyx_net/src/module" diff --git a/src/client/gfx/canvas.onyx b/src/client/gfx/canvas.onyx new file mode 100644 index 0000000..f8ffef2 --- /dev/null +++ b/src/client/gfx/canvas.onyx @@ -0,0 +1,61 @@ + +use package core +use package opengles + + +Canvas :: struct { + width, height: i32; + + framebuffer: GLint; + depth_stencil_buffer: GLint; + color_texture: GLint; +} + +canvas_make :: (width, height: i32) -> Canvas { + canvas: Canvas; + canvas.width = width; + canvas.height = height; + + glGenFramebuffers(1, ^canvas.framebuffer); + glBindFramebuffer(GL_FRAMEBUFFER, canvas.framebuffer); + + glGenTextures(1, ^canvas.color_texture); + glBindTexture(GL_TEXTURE_2D, canvas.color_texture); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, null); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + glBindTexture(GL_TEXTURE_2D, 0); + glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, canvas.color_texture, 0); + + glGenRenderbuffers(1, ^canvas.depth_stencil_buffer); + glBindRenderbuffer(GL_RENDERBUFFER, canvas.depth_stencil_buffer); + glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, width, height); + glBindRenderbuffer(GL_RENDERBUFFER, 0); + glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, canvas.depth_stencil_buffer); + + if glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE { + debug_log(.Error, "Framebuffer is not complete!"); + } + + glBindFramebuffer(GL_FRAMEBUFFER, 0); + return canvas; +} + +canvas_free :: (use canvas: ^Canvas) { + glDeleteFramebuffers(1, ^canvas.framebuffer); + glDeleteTextures(1, ^canvas.color_texture); + glDeleteRenderbuffers(1, ^canvas.depth_stencil_buffer); +} + +canvas_use :: (use canvas: ^Canvas) { + if canvas == null { + glBindFramebuffer(GL_FRAMEBUFFER, 0); + update_view_matrix(); + } else { + glBindFramebuffer(GL_FRAMEBUFFER, framebuffer); + // update_view_matrix(width, height); + } +} + +canvas_to_texture :: (canvas: ^Canvas) => Texture.{ canvas.color_texture, canvas.width, canvas.height, 3, "" }; + diff --git a/src/client/gfx/font.onyx b/src/client/gfx/font.onyx new file mode 100644 index 0000000..0cfcafb --- /dev/null +++ b/src/client/gfx/font.onyx @@ -0,0 +1,268 @@ + +use package core +use package core.intrinsics.onyx {__zero_value} +use package stb_truetype +use package opengles + +#local { + font_registry: Map(FontDescriptor, Font); + font_vbo: GLint; + font_vao: GLint; + + font_shader: Shader; + font_color: Color; +} + +fonts_init :: () { + map.init(^font_registry); + + font_shader = shader_make("./assets/shaders/font.glsl"); + shader_use(font_shader); + shader_link_window_matrix_block(font_shader); + shader_link_world_matrix_block(font_shader); + + glGenVertexArrays(1, ^font_vao); + glBindVertexArray(font_vao); + + font_interp_buffer: GLint; + glGenBuffers(1, ^font_interp_buffer); + glBindBuffer(GL_ARRAY_BUFFER, font_interp_buffer); + font_interp_data := f32.[ + 0.0, 0.0, + 1.0, 0.0, + 1.0, 1.0, + 0.0, 1.0, + ]; + glBufferData(GL_ARRAY_BUFFER, sizeof typeof font_interp_data, ~~^font_interp_data, GL_STATIC_DRAW); + glEnableVertexAttribArray(0); + glVertexAttribPointer(0, 2, GL_FLOAT, false, 2 * sizeof f32, ~~0); + + font_index_buffer: GLint; + glGenBuffers(1, ^font_index_buffer); + glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, font_index_buffer); + font_index_data := u8.[ 0, 1, 2, 0, 2, 3 ]; + glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof typeof font_index_data, ~~^font_index_data, GL_STATIC_DRAW); + + glGenBuffers(1, ^font_vbo); + glBindBuffer(GL_ARRAY_BUFFER, font_vbo); + glBufferData(GL_ARRAY_BUFFER, 1024 * sizeof stbtt_aligned_quad, null, GL_STREAM_DRAW); + + for 1..5 { + glEnableVertexAttribArray(it); + glVertexAttribDivisor(it, 1); + } + glVertexAttribPointer(1, 2, GL_FLOAT, false, sizeof stbtt_aligned_quad, ~~ 0); + glVertexAttribPointer(2, 2, GL_FLOAT, false, sizeof stbtt_aligned_quad, ~~16); + glVertexAttribPointer(3, 2, GL_FLOAT, false, sizeof stbtt_aligned_quad, ~~8); + glVertexAttribPointer(4, 2, GL_FLOAT, false, sizeof stbtt_aligned_quad, ~~24); + + glBindBuffer(GL_ARRAY_BUFFER, -1); + glBindVertexArray(-1); + + font_set_color(.{0,0,0}); +} + + +Font :: struct { + texture: GLint; + texture_width, texture_height: i32; + chars: [] stbtt_packedchar; + em: f32; +} + +font_make :: (fd: FontDescriptor) -> Font { + texture_size :: 256; + + char_data := memory.make_slice(stbtt_packedchar, 96); + + ttf_file := os.get_contents(fd.path); + if ttf_file.count == 0 { + println("Bad font"); + return __zero_value(Font); + } + defer cfree(ttf_file.data); + + pixels := calloc(texture_size * texture_size); + defer cfree(pixels); + + ctx: stbtt_pack_context; + stbtt_PackBegin(^ctx, pixels, texture_size, texture_size, 0, 1); + stbtt_PackFontRange(^ctx, ttf_file.data, 0, ~~fd.size, #char " ", 96, char_data.data); + stbtt_PackEnd(^ctx); + + texture: GLint; + glGenTextures(1, ^texture); + glBindTexture(GL_TEXTURE_2D, texture); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0); + glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, texture_size, texture_size, 0, GL_ALPHA, GL_UNSIGNED_BYTE, pixels); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glBindTexture(GL_TEXTURE_2D, 0); + + font := Font.{ + texture = texture, + texture_width = texture_size, + texture_height = texture_size, + chars = char_data, + em = ~~fd.size, + }; + + font_registry[fd] = font; + + return font; +} + +font_set_color :: (color: Color) { + font_color = color; +} + +font_print :: (font: Font, x, y: f32, format: str, va: ..any) { + buf: [1024] u8; + msg := conv.format_va(buf, format, va); + font_draw(font, x, y, msg); +} + +font_draw :: (font: Font, x, y: f32, msg: str) { + quads: ^stbtt_aligned_quad = alloc.from_stack(msg.count * sizeof stbtt_aligned_quad); + quad_num := 0; + + x_, y_ := x, y; + + for msg { + if it == #char "\n" { + x_ = x; + y_ += font.em + 2; + } + + stbtt_GetPackedQuad(font.chars.data, font.texture_width, font.texture_height, + ~~(it - #char " "), ^x_, ^y_, ^quads[quad_num], false); + + quad_num += 1; + } + + font_render(font, quads[0 .. quad_num]); +} + +font_draw_centered :: (font: Font, x, y, max_width: f32, msg: str) { + quads: ^stbtt_aligned_quad = alloc.from_stack(msg.count * sizeof stbtt_aligned_quad); + quad_num := 0; + + width := font_get_width(font, msg); + x_, y_ := x, y; + x_ = (max_width - width) / 2 + x; + + for msg { + if it == #char "\n" { + x_ = (max_width - width) / 2 + x; + y_ += font.em + 2; + } + + stbtt_GetPackedQuad(font.chars.data, font.texture_width, font.texture_height, + ~~(it - #char " "), ^x_, ^y_, ^quads[quad_num], false); + + quad_num += 1; + } + + font_render(font, quads[0 .. quad_num]); +} + +#local font_render :: (font: Font, quads: [] stbtt_aligned_quad) { + // If this is being used in conjunction with the immediate + // rendering system, make sure the immediate objects are flushed + // before trying to render over them. + #if #defined(immediate_flush) { + immediate_flush(); + } + + glBindBuffer(GL_ARRAY_BUFFER, font_vbo); + glBufferSubData(GL_ARRAY_BUFFER, 0, quads.count * sizeof stbtt_aligned_quad, quads.data); + glBindBuffer(GL_ARRAY_BUFFER, -1); + + glActiveTexture(GL_TEXTURE0); + glBindTexture(GL_TEXTURE_2D, font.texture); + shader_use(font_shader); + shader_set_uniform(font_shader, #cstr "u_texture", 0); + shader_set_uniform(font_shader, #cstr "u_color", font_color); + + glDisable(GL_DEPTH_TEST); + glBindVertexArray(font_vao); + glDrawElementsInstanced(GL_TRIANGLES, 6, GL_UNSIGNED_BYTE, ~~0, quads.count); + glBindTexture(GL_TEXTURE_2D, -1); + glBindVertexArray(-1); +} + +font_get_width :: (font: Font, msg: str) -> f32 { + x_, y_ := 0.0f, 0.0f; + width := 0.0f; + + quad: stbtt_aligned_quad; + for msg { + if it == #char "\n" { + width = math.max(width, x_); + x_ = 0; + y_ += font.em + 2; + continue; + } + + stbtt_GetPackedQuad(font.chars.data, font.texture_width, font.texture_height, + ~~(it - #char " "), ^x_, ^y_, ^quad, false); + } + + return math.max(x_, width); +} + +font_get_height :: (font: Font, msg: str) -> f32 { + x_, y_ := 0.0f, 0.0f; + width := 0.0f; + + quad: stbtt_aligned_quad; + for msg { + if it == #char "\n" { + width = math.max(width, x_); + x_ = 0; + y_ += font.em + 2; + continue; + } + + stbtt_GetPackedQuad(font.chars.data, font.texture_width, font.texture_height, + ~~(it - #char " "), ^x_, ^y_, ^quad, false); + } + + return y_ + font.em + 2; +} + +font_get_char_width :: (font: Font, ch: u8) -> f32 { + x, y := 0.0f, 0.0f; + quad: stbtt_aligned_quad; + + stbtt_GetPackedQuad(font.chars.data, font.texture_width, font.texture_height, + ~~(ch - #char " "), ^x, ^y, ^quad, false); + + return x; +} + + +FontDescriptor :: struct { + path : str; + size : u32; +} + +#match hash.to_u32 (fd: FontDescriptor) => { + name_hash := hash.to_u32(fd.path); + size_hash := hash.to_u32(fd.size); + return name_hash * 13 + size_hash * 17; +} + +#operator == (f1, f2: FontDescriptor) => f1.path == f2.path && f1.size == f2.size; + +font_lookup :: (fd := FontDescriptor.{ "assets/calibri.ttf", 12 }) -> Font { + if font_registry->has(fd) { + return font_registry[fd]; + } + + font := font_make(fd); + font_registry[fd] = font; + return font; +} + diff --git a/src/client/gfx/immediate.onyx b/src/client/gfx/immediate.onyx new file mode 100644 index 0000000..d1c764e --- /dev/null +++ b/src/client/gfx/immediate.onyx @@ -0,0 +1,197 @@ + +use package core +use package opengles +use package glfw3 + +immediate_init :: () { + memory.alloc_slice(^vertex_data, Maximum_Vertex_Count); + vertex_count = 0; + + imgui_shader = shader_make(Shader_Path); + shader_use(imgui_shader); + shader_link_window_matrix_block(imgui_shader); + shader_link_world_matrix_block(imgui_shader); + shader_set_uniform(imgui_shader, #cstr "u_texture_enabled", 0.0f); + shader_set_uniform(imgui_shader, #cstr "u_texture", 0); + + immediate_mesh = mesh_make(vertex_data, .[], GL_DYNAMIC_DRAW); + immediate_color = .{0,0,0}; +} + +immediate_flush :: () { + if vertex_count == 0 do return; + + shader_use(imgui_shader); + shader_set_uniform(imgui_shader, #cstr "u_texture_enabled", 1.0f if rendering_type == .Image else 0.0f); + + immediate_mesh.vertex_count = vertex_count; + mesh_update_verticies(immediate_mesh, vertex_data); + + mesh_draw(immediate_mesh); + + vertex_count = 0; + rendering_type = .Plain; + immediate_mesh.primitive = GL_TRIANGLES; +} + +immediate_clear :: (color: Color) { + glClearColor(color.r, color.g, color.b, color.a); + glClear(GL_COLOR_BUFFER_BIT); +} + +immediate_set_color :: (color: Color) { + immediate_color = color; +} + +immediate_vertex :: (x, y: f32, t_x := 0.0f, t_y := 0.0f) { + if vertex_count >= Maximum_Vertex_Count do immediate_flush(); + set_rendering_type(.Plain); + + vertex_data[vertex_count] = .{ .{x, y}, .{t_x, t_y}, immediate_color }; +} + +immediate_line :: (x1, y1, x2, y2: f32) { + if vertex_count >= Maximum_Vertex_Count do immediate_flush(); + set_rendering_type(.Line); + immediate_mesh.primitive = GL_LINES; + + vertex_data[vertex_count + 0] = .{ .{x1, y1}, .{0, 0}, immediate_color }; + vertex_data[vertex_count + 1] = .{ .{x2, y2}, .{0, 0}, immediate_color }; + vertex_count += 2; +} + +immediate_triangle :: (x1, x2, x3: Vector2) { + if vertex_count + 3 > Maximum_Vertex_Count do immediate_flush(); + set_rendering_type(.Plain); + + vertex_data[vertex_count + 0] = .{ x1, .{0,0}, immediate_color }; + vertex_data[vertex_count + 1] = .{ x2, .{0,0}, immediate_color }; + vertex_data[vertex_count + 2] = .{ x3, .{0,0}, immediate_color }; + vertex_count += 3; +} + +immediate_rectangle :: (x, y, w, h: f32) { + if vertex_count + 6 > Maximum_Vertex_Count do immediate_flush(); + set_rendering_type(.Plain); + + vertex_data[vertex_count + 0] = .{ .{x, y}, .{0,0}, immediate_color }; + vertex_data[vertex_count + 1] = .{ .{x+w, y}, .{0,0}, immediate_color }; + vertex_data[vertex_count + 2] = .{ .{x+w, y+h}, .{0,0}, immediate_color }; + vertex_data[vertex_count + 3] = .{ .{x, y}, .{0,0}, immediate_color }; + vertex_data[vertex_count + 4] = .{ .{x+w, y+h}, .{0,0}, immediate_color }; + vertex_data[vertex_count + 5] = .{ .{x, y+h}, .{0,0}, immediate_color }; + vertex_count += 6; +} + +immediate_image :: (image: ^Texture, x, y, w, h: f32) { + if vertex_count > 0 do immediate_flush(); + + set_rendering_type(.Image); + texture_use(image); + shader_use(imgui_shader); + shader_set_uniform(imgui_shader, #cstr "u_texture", 0); + + vertex_data[vertex_count + 0] = .{ .{x, y}, .{0,0}, immediate_color }; + vertex_data[vertex_count + 1] = .{ .{x+w, y}, .{1,0}, immediate_color }; + vertex_data[vertex_count + 2] = .{ .{x+w, y+h}, .{1,1}, immediate_color }; + vertex_data[vertex_count + 3] = .{ .{x, y}, .{0,0}, immediate_color }; + vertex_data[vertex_count + 4] = .{ .{x+w, y+h}, .{1,1}, immediate_color }; + vertex_data[vertex_count + 5] = .{ .{x, y+h}, .{0,1}, immediate_color }; + vertex_count += 6; +} + +immediate_subimage :: (image: ^Texture, x, y, w, h: f32, tx, ty, tw, th: f32) { + if vertex_count > 0 do immediate_flush(); + + set_rendering_type(.Image); + texture_use(image); + shader_use(imgui_shader); + shader_set_uniform(imgui_shader, #cstr "u_texture", 0); + + sx := tx / ~~ image.width; + sy := ty / ~~ image.height; + sw := tw / ~~ image.width; + sh := th / ~~ image.height; + + vertex_data[vertex_count + 0] = .{ .{x, y}, .{sx, sy}, immediate_color }; + vertex_data[vertex_count + 1] = .{ .{x+w, y}, .{sx+sw, sy}, immediate_color }; + vertex_data[vertex_count + 2] = .{ .{x+w, y+h}, .{sx+sw,sy+sh}, immediate_color }; + vertex_data[vertex_count + 3] = .{ .{x, y}, .{sx, sy}, immediate_color }; + vertex_data[vertex_count + 4] = .{ .{x+w, y+h}, .{sx+sw,sy+sh}, immediate_color }; + vertex_data[vertex_count + 5] = .{ .{x, y+h}, .{sx, sy+sh}, immediate_color }; + vertex_count += 6; +} + +immediate_ellipse :: () {} + +immediate_push_scissor :: (x, y, w, h: f32) { + // Assuming that x, y, w, and h are in screen (window) coordinates. + if vertex_count > 0 do immediate_flush(); + + scissors << .{x, y, w, h}; + glEnable(GL_SCISSOR_TEST); + glScissor(~~x, cast(i32) camera.window_height - ~~(y + h), ~~w, ~~h); +} + +immediate_pop_scissor :: () { + if vertex_count > 0 do immediate_flush(); + + if scissors.count > 0 { + array.pop(^scissors); + } + + if scissors.count > 0 { + glEnable(GL_SCISSOR_TEST); + s := scissors[scissors.count - 1]; + glScissor(~~s.x, cast(i32) camera.window_height - ~~(s.y + s.h), ~~s.w, ~~s.h); + } else { + glDisable(GL_SCISSOR_TEST); + } +} + +immediate_set_scroll :: (scroll_x, scroll_y: f32) { + offset = .{ scroll_x, scroll_y }; + update_model_matrix(.{ offset.x, offset.y, 0 }); +} + +immediate_get_scroll :: () => offset; + +Immediate_Vertex :: struct { + pos: Vector2; + tex: Vector2; + color: Color; +} + +#local { + Shader_Path :: "./assets/shaders/imgui.glsl" + imgui_shader: Shader; + + Maximum_Vertex_Count :: 1023; + vertex_count: i32; + vertex_data: [] Immediate_Vertex; + + immediate_color: Color; + + immediate_mesh: ^Mesh(Immediate_Vertex); + + Rendering_Type :: enum { + Plain; + Line; + Image; + } + rendering_type := Rendering_Type.Plain; + + Scissor :: struct { + x, y, w, h: f32; + } + scissors: [..] Scissor; + + offset: Vector2; + + set_rendering_type :: (new_type: typeof rendering_type) { + if rendering_type != new_type { + immediate_flush(); + rendering_type = new_type; + } + } +} diff --git a/src/client/gfx/mesh.onyx b/src/client/gfx/mesh.onyx new file mode 100644 index 0000000..db769a9 --- /dev/null +++ b/src/client/gfx/mesh.onyx @@ -0,0 +1,87 @@ +use package core +use package opengles + +Mesh :: struct (Vertex_Type: type_expr) { + handle: GLint; + vertex_handle: GLint; + index_handle: GLint; + + vertex_count: u32; + index_count: u32; + primitive: GLuint = GL_TRIANGLES; +} + +mesh_make :: (verticies: [] $T, indicies: [] u32, gl_hint := GL_STATIC_DRAW) -> ^Mesh(T) { + mesh := new(Mesh(T)); + mesh.vertex_count = verticies.count; + mesh.index_count = indicies.count; + + glGenVertexArrays(1, ^mesh.handle); + glBindVertexArray(mesh.handle); + + glGenBuffers(1, ^mesh.vertex_handle); + glBindBuffer(GL_ARRAY_BUFFER, mesh.vertex_handle); + glBufferData(GL_ARRAY_BUFFER, sizeof T * verticies.count, verticies.data, gl_hint); + + vertex_info := cast(^type_info.Type_Info_Struct) type_info.get_type_info(T); + vertex_attr := 0; + for attr: vertex_info.members { + defer vertex_attr += 1; + glEnableVertexAttribArray(vertex_attr); + + switch attr.type { + case Vector2 do glVertexAttribPointer(vertex_attr, 2, GL_FLOAT, false, sizeof T, ~~attr.offset); + case Vector3 do glVertexAttribPointer(vertex_attr, 3, GL_FLOAT, false, sizeof T, ~~attr.offset); + case u32 do glVertexAttribIPointer(vertex_attr, 1, GL_UNSIGNED_INT, sizeof T, ~~attr.offset); + case i32 do glVertexAttribIPointer(vertex_attr, 1, GL_INT, sizeof T, ~~attr.offset); + + // It would be nice to not have to have all the cases here. + // Instead allow for an extensible way of defining them at compile time. + case Color do glVertexAttribPointer(vertex_attr, 4, GL_FLOAT, false, sizeof T, ~~attr.offset); + + case #default { + buf: [256] u8; + msg := conv.str_format(buf, "Unknown type for GL vertex attribute, {}.", attr.type); + assert(false, msg); + } + } + } + + if indicies.count > 0 { + glGenBuffers(1, ^mesh.index_handle); + glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mesh.index_handle); + glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof i32 * indicies.count, indicies.data, gl_hint); + } + + glBindVertexArray(-1); + + return mesh; +} + +mesh_update_verticies :: (use mesh: ^Mesh, verticies: [] mesh.Vertex_Type) { + @TODO // Add bounds checking to arrays here. + + glBindBuffer(GL_ARRAY_BUFFER, vertex_handle); + glBufferSubData(GL_ARRAY_BUFFER, 0, verticies.count * sizeof mesh.Vertex_Type, verticies.data); + glBindBuffer(GL_ARRAY_BUFFER, -1); +} + +mesh_draw :: (use mesh: ^Mesh) { + glBindVertexArray(handle); + if index_count > 0 { + glDrawElements(primitive, index_count, GL_UNSIGNED_INT, ~~0); + } else { + glDrawArrays(primitive, 0, vertex_count); + } + glBindVertexArray(-1); +} + +mesh_free :: (mesh: ^Mesh) { + glDeleteBuffers(1, ^mesh.vertex_handle); + glDeleteBuffers(1, ^mesh.index_handle); + glDeleteVertexArrays(1, ^mesh.handle); + cfree(mesh); +} + + + diff --git a/src/client/gfx/shader.onyx b/src/client/gfx/shader.onyx new file mode 100644 index 0000000..2ba5f76 --- /dev/null +++ b/src/client/gfx/shader.onyx @@ -0,0 +1,171 @@ + +use package core +use package opengles + +Shader :: struct { + vs, fs: GLuint; + prog: GLuint; +} + +window_matrix_block_buffer: GLuint; +world_matrix_block_buffer: GLuint; + +shaders_init :: () { + glGenBuffers(1, ^window_matrix_block_buffer); + glGenBuffers(1, ^world_matrix_block_buffer); + + glBindBuffer(GL_UNIFORM_BUFFER, window_matrix_block_buffer); + glBufferData(GL_UNIFORM_BUFFER, sizeof f32 * 16, null, GL_DYNAMIC_DRAW); + + glBindBuffer(GL_UNIFORM_BUFFER, world_matrix_block_buffer); + glBufferData(GL_UNIFORM_BUFFER, sizeof f32 * (16 + 16 + 16), null, GL_DYNAMIC_DRAW); + + glBindBuffer(GL_UNIFORM_BUFFER, -1); + + glBindBufferBase(GL_UNIFORM_BUFFER, WINDOW_MATRIX_BLOCK, window_matrix_block_buffer); + glBindBufferBase(GL_UNIFORM_BUFFER, WORLD_MATRIX_BLOCK, world_matrix_block_buffer); +} + +shader_make :: (path: str) -> Shader { + shader := os.get_contents(path); + vs := compile_shader(shader, GL_VERTEX_SHADER); + fs := compile_shader(shader, GL_FRAGMENT_SHADER); + + prog := link_program(vs, fs); + + return Shader.{vs, fs, prog}; +} + +shader_use :: (shader: Shader) { + glUseProgram(shader.prog); +} + +#local { + WINDOW_MATRIX_BLOCK :: 0; + WORLD_MATRIX_BLOCK :: 1; +} + +shader_link_window_matrix_block :: (use shader: Shader) { + matrix_block_index := glGetUniformBlockIndex(prog, #cstr "u_window_matrix_block"); + glUniformBlockBinding(prog, matrix_block_index, WINDOW_MATRIX_BLOCK); +} + +shader_link_world_matrix_block :: (use shader: Shader) { + matrix_block_index := glGetUniformBlockIndex(prog, #cstr "u_world_matrix_block"); + glUniformBlockBinding(prog, matrix_block_index, WORLD_MATRIX_BLOCK); +} + +shader_set_uniform :: (shader: Shader, uniform: cstr, value: $T) { + glUseProgram(shader.prog); + location := glGetUniformLocation(shader.prog, uniform); + + set_uniform_internal(location, value); + + set_uniform_internal :: #match { + macro (location: GLint, value: u32) do glUniform1i(location, value); , + macro (location: GLint, value: f32) do glUniform1f(location, value); , + macro (location: GLint, value: Vector3) do glUniform3f(location, value.x, value.y, value.z); , + macro (location: GLint, value: Color) do glUniform4f(location, value.r, value.g, value.b, value.a); , + + macro (location: GLint, value: $T) { + buffer: [1024] u8; + assert(false, conv.format(buffer, "Bad shader_set_uniform case: {}", T)); + } + } +} + +update_view_matrix :: () { + view_mat: [16] f32; + camera_get_view_matrix(^camera, view_mat); + + glBindBuffer(GL_UNIFORM_BUFFER, world_matrix_block_buffer); + glBufferSubData(GL_UNIFORM_BUFFER, 0, sizeof typeof view_mat, ^view_mat); + glBindBuffer(GL_UNIFORM_BUFFER, -1); +} + +update_world_matrix :: () { + world_mat: [16] f32; + camera_get_world_matrix(^camera, world_mat); + + glBindBuffer(GL_UNIFORM_BUFFER, world_matrix_block_buffer); + glBufferSubData(GL_UNIFORM_BUFFER, 16 * sizeof f32, sizeof typeof world_mat, ^world_mat); + glBindBuffer(GL_UNIFORM_BUFFER, -1); +} + +update_window_matrix :: () { + window_mat: [16] f32; + camera_get_window_matrix(^camera, window_mat); + + glBindBuffer(GL_UNIFORM_BUFFER, window_matrix_block_buffer); + glBufferSubData(GL_UNIFORM_BUFFER, 0, sizeof typeof window_mat, ^window_mat); + glBindBuffer(GL_UNIFORM_BUFFER, -1); +} + +update_model_matrix :: (v: Vector3) { + model_mat: [16] f32; + model_mat[0] = 1; + model_mat[5] = 1; + model_mat[10] = 1; + model_mat[12] = v.x; + model_mat[13] = v.y; + model_mat[14] = v.z; + model_mat[15] = 1; + + glBindBuffer(GL_UNIFORM_BUFFER, world_matrix_block_buffer); + glBufferSubData(GL_UNIFORM_BUFFER, 32 * sizeof f32, sizeof typeof model_mat, ^model_mat); + glBindBuffer(GL_UNIFORM_BUFFER, -1); +} + + +#local { + compile_shader :: (source: str, type: GLenum) -> GLint { + shader := glCreateShader(type); + + #persist VERTEX_HEADER := """ +#version 300 es +#define VERTEX_SHADER 1 +#define COMM out + """; + + #persist FRAGMENT_HEADER := """ +#version 300 es +#define FRAGMENT_SHADER 1 +#define COMM in + """; + + header := VERTEX_HEADER if type == GL_VERTEX_SHADER else FRAGMENT_HEADER; + sources : [] cptr(u8) = .[ cptr.make(header.data), cptr.make(source.data) ]; + source_lens : [] i32 = .[ header.count, source.count ]; + + glShaderSource(shader, 2, sources.data, source_lens.data); + glCompileShader(shader); + + success: GLint; + if glGetShaderiv(shader, GL_COMPILE_STATUS, ^success); success == GL_FALSE { + buf_data: [2048] u8; + buf := str.{ ~~buf_data, 0 }; + glGetShaderInfoLog(shader, 2048, ^buf.count, buf.data); + println(buf); + } + + return shader; + } + + link_program :: (vertex_shader, fragment_shader: GLint) -> GLuint { + prog := glCreateProgram(); + glAttachShader(prog, vertex_shader); + glAttachShader(prog, fragment_shader); + glLinkProgram(prog); + + success: GLint; + if glGetProgramiv(prog, GL_LINK_STATUS, ^success); success == GL_FALSE { + buf_data: [1024] u8; + buf := str.{ ~~buf_data, 0 }; + glGetProgramInfoLog(prog, 1024, ^buf.count, buf.data); + println(buf); + } + + return prog; + } +} + diff --git a/src/client/gfx/texture.onyx b/src/client/gfx/texture.onyx new file mode 100644 index 0000000..289eb57 --- /dev/null +++ b/src/client/gfx/texture.onyx @@ -0,0 +1,88 @@ + +use package core +use package core.intrinsics.onyx { __zero_value as Zero } +use package opengles +use package stb_image + +#local texture_cache: Map(str, Texture); + +Texture :: struct { + texture: GLint; + width, height, channels: i32; + filename: str; +} + +texture_lookup :: #match {} +#match texture_lookup (filename: str) -> (Texture, bool) { + if texture_cache->has(filename) { + return texture_cache[filename], true; + } + + buffer: [512] u8; + memory.copy(~~ buffer, filename.data, math.min(filename.count, 511)); + return texture_lookup(cast(cstr) buffer); +} + +#match texture_lookup (path: cstr) -> (Texture, bool) { + filename := string.from_cstr(path); + if texture_cache->has(filename) { + return texture_cache[filename], true; + } + + tex: Texture; + tex.filename = filename; + pixels := stbi_load(path, ^tex.width, ^tex.height, ^tex.channels, 4); + if pixels == null { + debug_log(.Warning, "Failed to load texture: {}", filename); + return Zero(Texture), false; + } + defer stbi_image_free(pixels); + + glGenTextures(1, ^tex.texture); + glBindTexture(GL_TEXTURE_2D, tex.texture); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex.width, tex.height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels); + + // Are these sensible defaults? + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + + glBindTexture(GL_TEXTURE_2D, 0); + + // This assumes that the filename data is going to be persistant forever. + // Not a great assumption to make but is it really worth copying it? + texture_cache[filename] = tex; + debug_log(.Info, "Loaded texture: {}", filename); + return tex, true; +} + +texture_free :: (use tex: ^Texture) { + glDeleteTextures(1, ^texture); +} + +texture_use :: (use tex: ^Texture, texture_binding := 0) { + glActiveTexture(GL_TEXTURE0 + texture_binding); + glBindTexture(GL_TEXTURE_2D, texture); +} + + +Texture_Wrap :: enum { + Clamp :: GL_CLAMP_TO_EDGE | 0; + Repeat :: GL_REPEAT | 0; + Mirrored_Repeat :: GL_MIRRORED_REPEAT | 0; +} + +texture_wrap :: (use tex: ^Texture, wrap: Texture_Wrap) { + glBindTexture(GL_TEXTURE_2D, texture); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, ~~ wrap); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, ~~ wrap); +} + +texture_cache_clear :: () { + for^ texture_cache.entries { + glDeleteTextures(1, ^it.value.texture); + } + + map.clear(^texture_cache); +} \ No newline at end of file diff --git a/src/client/gfx/ui.onyx b/src/client/gfx/ui.onyx new file mode 100644 index 0000000..570a2ef --- /dev/null +++ b/src/client/gfx/ui.onyx @@ -0,0 +1,773 @@ +// +// Very simple immediate mode UI +// + +use package core +use package opengles +use package glfw3 + +UI_Id :: u32 + +ui_end_frame :: () { + hot_item_depth_needed = hot_item_depth; + if !hot_item_was_set do set_hot_item(0); + hot_item_depth = 0; + hot_item_was_set = false; + + for^ animation_states.entries { + if !it.value.accessed_this_frame || (it.value.click_time == 0 && it.value.hover_time == 0) { + map.delete(^animation_states, it.key); + } + } + + for^ animation_states.entries { + it.value.accessed_this_frame = false; + } + + if active_countdown > 0 { + active_countdown -= 1; + if active_countdown == 0 { + set_active_item(0); + input_release_keys(); + } + } +} + +// +// Buttons +// +Button_Theme :: struct { + use text_theme := Text_Theme.{}; + use animation_theme := Animation_Theme.{}; + + background_color := Color.{ 0.1, 0.1, 0.1 }; + hover_color := Color.{ 0.3, 0.3, 0.3 }; + click_color := Color.{ 0.5, 0.5, 0.7 }; + + border_color := Color.{0.2, 0.2, 0.2}; + border_width := 2.0f; + + active := false; +} + +#local default_button_theme := Button_Theme.{}; + +draw_button :: (use r: Rect, text: str, theme := ^default_button_theme, site := #callsite, increment := 0) -> bool { + result := false; + + hash := get_site_hash(site, increment); + animation_state := get_animation(hash); + mx, my := mouse_get_position(); + + contains := Rect.contains(r, .{~~mx, ~~my}); + + if is_active_item(hash) { + renew_active_item(hash); + if is_button_just_up(GLFW_MOUSE_BUTTON_LEFT) { + if is_hot_item(hash) && contains { + result = true; + animation_state.click_time = 1.0f; + } + + set_active_item(0); + } + } elseif is_hot_item(hash) { + if is_button_down(GLFW_MOUSE_BUTTON_LEFT) { + set_active_item(hash); + } + } + + if contains { + set_hot_item(hash); + } + + if is_hot_item(hash) || theme.active { + move_towards(^animation_state.hover_time, 1.0f, theme.hover_speed); + } else { + move_towards(^animation_state.hover_time, 0.0f, theme.hover_speed); + } + + border_width := theme.border_width; + + immediate_set_color(theme.border_color); + immediate_rectangle(x, y, w, h); + + surface_color := color_lerp(animation_state.hover_time, theme.background_color, theme.hover_color); + surface_color = color_lerp(animation_state.click_time, surface_color, theme.click_color); + immediate_set_color(surface_color); + immediate_rectangle(x + border_width, y + border_width, w - border_width * 2, h - border_width * 2); + + font := font_lookup(.{theme.font_name, theme.font_size}); + font_height := font_get_height(font, text); + font_set_color(theme.text_color); + font_draw_centered(font, x, y + (h - font_height) / 2 + font.em - 2, w, text); + + move_towards(^animation_state.click_time, 0.0f, theme.click_decay_speed); + + return result; +} + + +// +// Sliders +// +Slider_Theme :: struct { + use text_theme := Text_Theme.{}; + use animation_theme := Animation_Theme.{}; + + box_color := Color.{ 0.1, 0.1, 0.1 }; + box_border_color := Color.{ 0.2, 0.2, 0.2 }; + box_border_width := 4.0f; @InPixels + + bar_color := Color.{ 0.4, 0.4, 0.4 }; + bar_hover_color := Color.{ 0, 0, 1 }; + bar_hover_negative_color := Color.{ 1, 0, 0 }; // The color when value is less than 0 +} + +#local default_slider_theme := Slider_Theme.{}; + +draw_slider :: (use r: Rect, value: ^$T, min_value: T, max_value: T, theme := ^default_slider_theme, site := #callsite, increment := 0) -> bool { + result := false; + + hash := get_site_hash(site, increment); + state := get_animation(hash); + mx, my := mouse_get_position(); + + if is_hot_item(hash) { + if is_button_down(GLFW_MOUSE_BUTTON_LEFT) { + set_active_item(hash); + result = true; + + // Animate this? + sx := ~~mx - x; + + if T == i32 || T == i64 || T == u32 || T == u64 { + step_width := w / ~~math.abs(max_value - min_value); + percent := (sx + step_width / 2) / w; + *value = math.lerp(percent, min_value, max_value); + *value = math.clamp(*value, min_value, max_value); + + } else { + percent := sx / w; + *value = math.lerp(percent, min_value, max_value); + *value = math.clamp(*value, min_value, max_value); + } + } else { + set_active_item(0); + } + } + + if Rect.contains(r, .{ ~~mx, ~~my }) { + set_hot_item(hash); + } + + if is_hot_item(hash) { + move_towards(^state.hover_time, 1.0f, theme.hover_speed); + } else { + move_towards(^state.hover_time, 0.0f, theme.hover_speed); + } + + box_border_width := theme.box_border_width; + + bar_color := theme.bar_color; + if *value < 0 do bar_color = color_lerp(state.hover_time, bar_color, theme.bar_hover_negative_color); + else do bar_color = color_lerp(state.hover_time, bar_color, theme.bar_hover_color); + + immediate_set_color(theme.box_border_color); + immediate_rectangle(x, y, w, h); + + immediate_set_color(theme.box_border_color); + immediate_rectangle(x + box_border_width, y + box_border_width, w - box_border_width * 2, h - box_border_width * 2); + + box_width := cast(f32) (*value - min_value) / ~~(max_value - min_value); + box_width *= w - box_border_width * 2; + box_width = math.clamp(box_width, 0, w - box_border_width * 2); + immediate_set_color(bar_color); + immediate_rectangle(x + box_border_width, y + box_border_width, box_width, h - box_border_width * 2); + + return result; +} + +// +// Textbox +// +Textbox_Theme :: struct { + use text_theme := Text_Theme.{ + text_color = .{ 0, 0, 0 } + }; + + use animation_theme := Animation_Theme.{}; + + background_color := Color.{ 0.8, 0.8, 0.8 }; + hover_color := Color.{ 1.0, 1.0, 1.0 }; + click_color := Color.{ 0.5, 0.5, 0.7 }; + + border_color := Color.{ 0.2, 0.2, 0.2 }; + border_width := 6.0f; @InPixels + + cursor_color := Color.{ 0.5, 0.5, 0.5 }; + cursor_width := 4.0f; @InPixels + cursor_blink_speed := 0.04f; // Bigger is faster + + placeholder_text_color := Color.{ 0.5, 0.5, 0.5 }; +} + +#local { + default_textbox_theme := Textbox_Theme.{}; + + Textbox_Editing_State :: struct { + hash: UI_Id = 0; + + cursor_position: i32 = 0; + cursor_animation := 0.0f; + cursor_animation_speed := 0.02f; + + @HACK // Otherwise the action keys are evaluated every frame. + action_key_timeout := 0.0f; + } + + textbox_editing_state := Textbox_Editing_State.{}; + + Textbox_Return_Value :: enum { + None; + Characters_Inputted; + Enter_Pressed; + } +} + +draw_textbox :: (use r: Rect, text_buffer: ^[..] u8, placeholder := null_str, theme := ^default_textbox_theme, site := #callsite, increment := 0) -> Textbox_Return_Value { + result := Textbox_Return_Value.None; + + hash := get_site_hash(site, increment); + animation_state := get_animation(hash); + mx, my := mouse_get_position(); + + border_width := theme.border_width; + text_color := theme.text_color; + text := str.{text_buffer.data, text_buffer.count}; + if text.count == 0 && placeholder.count > 0 { + text = placeholder; + text_color = theme.placeholder_text_color; + } + + font := font_lookup(.{theme.font_name, theme.font_size}); + text_width := font_get_width(font, text); + text_height := font_get_height(font, text); + + text_x := x + border_width; + text_y := y + font.em + (h - text_height) / 2; + + contains := Rect.contains(r, .{~~mx, ~~my}); + + if is_hot_item(hash) && !is_active_item(hash) { + if is_button_down(GLFW_MOUSE_BUTTON_LEFT) && contains { + set_active_item(hash); + input_capture_keys(); + textbox_editing_state.hash = hash; + textbox_editing_state.cursor_animation_speed = theme.cursor_blink_speed; + } + } + + if is_active_item(hash) { + renew_active_item(hash); + if is_button_just_down(GLFW_MOUSE_BUTTON_LEFT) && !contains { + set_active_item(0); + input_release_keys(); + textbox_editing_state.hash = 0; + textbox_editing_state.cursor_position = 0; + } + } + + if contains { + set_hot_item(hash); + } + + if textbox_editing_state.hash == hash { + move_towards(^textbox_editing_state.cursor_animation, 0.0f, textbox_editing_state.cursor_animation_speed); + if textbox_editing_state.cursor_animation <= 0.0f do textbox_editing_state.cursor_animation = 1.0f; + + if is_button_down(GLFW_MOUSE_BUTTON_LEFT) && contains { + textbox_editing_state.cursor_animation = 1.0f; + textbox_editing_state.cursor_position = screen_to_cursor(^font, text_x, text_y, text, ~~mx, ~~my); + } + + move_towards(^textbox_editing_state.action_key_timeout, 0, 0.05f); + if textbox_editing_state.action_key_timeout == 0 { + keys := input_get_keys_this_frame(); + for key: iter.as_iterator(^keys) { + textbox_editing_state.action_key_timeout = 0.17f; + + switch key.key { + case GLFW_KEY_ESCAPE { + set_active_item(0); + input_release_keys(); + } + + case GLFW_KEY_LEFT do textbox_editing_state.cursor_position -= 1; + case GLFW_KEY_RIGHT do textbox_editing_state.cursor_position += 1; + case GLFW_KEY_END do textbox_editing_state.cursor_position = text_buffer.count; + case GLFW_KEY_HOME do textbox_editing_state.cursor_position = 0; + + case GLFW_KEY_BACKSPACE { + if textbox_editing_state.cursor_position > 0 { + array.delete(text_buffer, textbox_editing_state.cursor_position - 1); + } + textbox_editing_state.cursor_position = math.max(~~0, textbox_editing_state.cursor_position - 1); + } + + case GLFW_KEY_DELETE { + array.delete(text_buffer, textbox_editing_state.cursor_position); + } + + case GLFW_KEY_ENTER { + result = .Enter_Pressed; + } + } + } + } + + for ch: input_get_chars_this_frame() { + array.insert(text_buffer, textbox_editing_state.cursor_position, ~~ch); + textbox_editing_state.cursor_position += 1; + result = .Characters_Inputted; + } + + textbox_editing_state.cursor_position = math.clamp(textbox_editing_state.cursor_position, 0, text_buffer.count); + textbox_editing_state.cursor_animation = 1.0f; + + text = str.{text_buffer.data, text_buffer.count}; + } + + if is_hot_item(hash) { + move_towards(^animation_state.hover_time, 1.0f, theme.hover_speed); + } else { + move_towards(^animation_state.hover_time, 0.0f, theme.hover_speed); + } + + immediate_push_scissor(x, y, w, h); + immediate_set_color(theme.border_color); + immediate_rectangle(x, y, w, h); + + surface_color := color_lerp(animation_state.hover_time, theme.background_color, theme.hover_color); + surface_color = color_lerp(animation_state.click_time, surface_color, theme.click_color); + immediate_set_color(surface_color); + immediate_rectangle(x + border_width, y + border_width, w - border_width * 2, h - border_width * 2); + + // Draw the cursor on textboxes + if is_active_item(hash) { + cursor := cursor_to_screen(^font, x + border_width, y + border_width, text, textbox_editing_state.cursor_position); + right_edge := x + w - border_width * 2; + if cursor.x > right_edge { + text_x -= cursor.x - right_edge; + cursor.x = right_edge - 2; + } + immediate_set_color(.{0,0,0}); + immediate_rectangle(cursor.x, cursor.y + 2, 2, h - border_width * 2 - 4); + } + + font_set_color(theme.text_color); + font_draw(font, text_x, text_y, text); // This is technically a frame late for updating the text? + + move_towards(^animation_state.click_time, 0.0f, theme.click_decay_speed); + + immediate_pop_scissor(); + return result; + + cursor_to_screen :: (font: ^Font, x, y: f32, text: str, cur_pos: i32) -> Vector2 { + cx := x; + cy := y; + + for text[0 .. cur_pos] { + if it == #char "\n" { + cx = 0; + cy += font.em + 2; + } else { + cx += font_get_char_width(*font, it); + } + } + + return .{ cx, cy }; + } + + screen_to_cursor :: (font: ^Font, x, y: f32, text: str, mouse_x, mouse_y: f32) -> i32 { + mx := mouse_x - x; + my := mouse_y - y; + + cx := 0.0f; + cy := 0.0f; + for pos: text.count { + if text[pos] == #char "\n" { + cx = 0; + cy += font.em + 2; + } else { + cx += font_get_char_width(*font, text[pos]); + } + + if cy >= my && cx >= mx { + return pos; + } + } + + return text.count; + } +} + + + + +// +// Checkboxes +// +Checkbox_Theme :: struct { + use text_theme := Text_Theme.{}; + use animation_theme := Animation_Theme.{}; + + box_color := Color.{ 0.2, 0.2, 0.2 }; + box_border_width := 4.0f; @InPixels + box_size := 20.0f; @InPixels + + checked_color := Color.{ 1, 0, 0 }; + checked_hover_color := Color.{ 1, 0.6, 0.6 }; + + background_color := Color.{ 0.05, 0.05, 0.05 }; // Background of the checkbox button. + hover_color := Color.{ 0.3, 0.3, 0.3 }; + click_color := Color.{ 0.5, 0.5, 0.7 }; +} + +#local default_checkbox_theme := Checkbox_Theme.{}; + +draw_checkbox :: (use r: Rect, value: ^bool, text: str, theme := ^default_checkbox_theme, site := #callsite, increment := 0) -> bool { + result := false; + + hash := get_site_hash(site, increment); + animation_state := get_animation(hash); + mx, my := mouse_get_position(); + + contains := Rect.contains(r, .{~~mx, ~~my}); + + if is_active_item(hash) { + renew_active_item(hash); + if is_button_just_up(GLFW_MOUSE_BUTTON_LEFT) { + if is_hot_item(hash) && contains { + result = true; + *value = !*value; + animation_state.click_time = 1.0f; + } + + set_active_item(0); + } + } elseif is_hot_item(hash) { + if is_button_down(GLFW_MOUSE_BUTTON_LEFT) { + set_active_item(hash); + } + } + + if contains { + set_hot_item(hash); + } + + if is_hot_item(hash) { + move_towards(^animation_state.hover_time, 1.0f, theme.hover_speed); + } else { + move_towards(^animation_state.hover_time, 0.0f, theme.hover_speed); + } + + box_border_width := theme.box_border_width; + box_size := theme.box_size; + + immediate_set_color(theme.box_color); + immediate_rectangle(x + 4, y + (h - box_size) / 2, box_size, box_size); + + surface_color : Color; + if *value { + surface_color = theme.checked_color; + surface_color = color_lerp(animation_state.hover_time, surface_color, theme.checked_hover_color); + + } else { + surface_color = theme.background_color; + surface_color = color_lerp(animation_state.hover_time, surface_color, theme.hover_color); + } + + surface_color = color_lerp(animation_state.click_time, surface_color, theme.click_color); + + immediate_set_color(surface_color); + immediate_rectangle(x + 4 + box_border_width, y + (h - box_size) / 2 + box_border_width, box_size - box_border_width * 2, box_size - box_border_width * 2); + + font := font_lookup(.{theme.font_name, theme.font_size}); + text_width := font_get_width(font, text); + text_height := font_get_height(font, text); + + font_set_color(theme.text_color); + font_draw(font, x + box_size + 4 * 2, y + font.em + (h - text_height) / 2, text); + + move_towards(^animation_state.click_time, 0.0f, theme.click_decay_speed); + + return result; +} + + +// +// Radio buttons +// +Radio_Theme :: struct { + use text_theme := Text_Theme.{}; + use animation_theme := Animation_Theme.{}; + + box_color := Color.{ 0.2, 0.2, 0.2 }; + box_border_width := 4.0f; @InPixels + box_size := 20.0f; @InPixels + + checked_color := Color.{ 0, 0, 1 }; + checked_hover_color := Color.{ 0.6, 0.6, 1 }; + + background_color := Color.{ 0.05, 0.05, 0.05 }; // Background of the checkbox button. + hover_color := Color.{ 0.3, 0.3, 0.3 }; + click_color := Color.{ 0.5, 0.5, 0.7 }; +} + +#local default_radio_theme := Radio_Theme.{}; + +draw_radio :: (use r: Rect, value: ^$T, set_to: T, text: str, theme := ^default_radio_theme, site := #callsite, increment := 0) -> bool { + result := false; + + hash := get_site_hash(site, increment); + animation_state := get_animation(hash); + mx, my := mouse_get_position(); + + contains := Rect.contains(r, .{~~mx, ~~my}); + + if is_active_item(hash) { + renew_active_item(hash); + if is_button_just_up(GLFW_MOUSE_BUTTON_LEFT) { + if is_hot_item(hash) && contains { + result = true; + *value = set_to; + animation_state.click_time = 1.0f; + } + + set_active_item(0); + } + } elseif is_hot_item(hash) { + if is_button_down(GLFW_MOUSE_BUTTON_LEFT) { + set_active_item(hash); + } + } + + if contains { + set_hot_item(hash); + } + + if is_hot_item(hash) { + move_towards(^animation_state.hover_time, 1.0f, theme.hover_speed); + } else { + move_towards(^animation_state.hover_time, 0.0f, theme.hover_speed); + } + + box_border_width := theme.box_border_width; + box_size := theme.box_size; + + immediate_set_color(theme.box_color); + immediate_rectangle(x + 4, y + (h - box_size) / 2, box_size, box_size); + + surface_color : Color; + if *value == set_to { + surface_color = theme.checked_color; + surface_color = color_lerp(animation_state.hover_time, surface_color, theme.checked_hover_color); + + } else { + surface_color = theme.background_color; + surface_color = color_lerp(animation_state.hover_time, surface_color, theme.hover_color); + } + + surface_color = color_lerp(animation_state.click_time, surface_color, theme.click_color); + + immediate_set_color(surface_color); + immediate_rectangle(x + 4 + box_border_width, y + (h - box_size) / 2 + box_border_width, box_size - box_border_width * 2, box_size - box_border_width * 2); + + font := font_lookup(.{theme.font_name, theme.font_size}); + text_width := font_get_width(font, text); + text_height := font_get_height(font, text); + + font_set_color(theme.text_color); + font_draw(font, x + box_size + 4 * 2, y + font.em + (h - text_height) / 2, text); + + move_towards(^animation_state.click_time, 0.0f, theme.click_decay_speed); + + return result; +} + + + + +scrolling_region_start :: (r: Rect, max_y_scroll := 10000.0f, site := #callsite, increment := 0) { + hash := get_site_hash(site, increment); + mx, my := mouse_get_position(); + state := map.get_ptr(^scroll_states, hash); + if state == null { + animation_states[hash] = .{}; + state = ^scroll_states[hash]; + } + + contains := Rect.contains(r, .{~~mx, ~~my}); + if contains { + scroll_delta := mouse_get_scroll_vector(); + state.xscroll -= scroll_delta.x * 20; + state.yscroll -= scroll_delta.y * 20; + + state.yscroll = math.clamp(state.yscroll, 0, max_y_scroll); + } + + immediate_flush(); + immediate_push_scissor(r.x, r.y, r.w, r.h); + immediate_set_scroll(-state.xscroll, -state.yscroll); +} + +scrolling_region_stop :: () { + immediate_flush(); + immediate_pop_scissor(); + immediate_set_scroll(0, 0); +} + + +#if !#defined(Rect) { + Rect :: struct { + x, y, w, h: f32; + + intersects :: (r1, r2: Rect) -> bool { + return r1.x <= r2.x + r2.w + && r1.x + r1.w >= r2.x + && r1.y <= r2.y + r2.h + && r1.y + r1.h >= r2.y; + } + + contains :: (r: Rect, p: Vector2) -> bool { + return r.x <= p.x && r.x + r.w >= p.x + && r.y <= p.y && r.y + r.h >= p.y; + } + } +} + +#if !#defined(move_towards) { + move_towards :: (v: ^$T, target: T, diff: T) { + if math.abs(target - *v) <= diff { + *v = target; + return; + } + if *v < target do *v += diff; + if *v > target do *v -= diff; + } +} + +#local { + hot_item : UI_Id = 0 + hot_item_was_set := false + + hot_item_depth := 0; + hot_item_depth_needed := 0; + + active_item : UI_Id = 0 + active_countdown := 0 + + set_active_item :: (id: UI_Id) -> bool { + active_item = id; + active_countdown = 2; + return true; + } + + renew_active_item :: (id: UI_Id) { + if active_item == id { + active_countdown = 2; + } + } + + set_hot_item :: (id: UI_Id, force := false) -> bool { + if active_item != 0 do return false; + + if force { + hot_item_was_set = true; + hot_item = id; + return true; + } + + hot_item_depth += 1; + if hot_item_depth >= hot_item_depth_needed { + hot_item_was_set = true; + hot_item = id; + return true; + } + + return false; + } + + is_active_item :: (id: UI_Id) -> bool { + return active_item == id; + } + + is_hot_item :: (id: UI_Id) -> bool { + return hot_item == id; + } + + Text_Theme :: struct { + text_color := Color.{1, 1, 1}; + font_name := "./assets/fonts/calibri.ttf"; + font_size := 18; + } + + Animation_Theme :: struct { + hover_speed := 0.1f; + click_decay_speed := 0.08f; + } + + Animation_State :: struct { + hover_time := 0.0f; + click_time := 0.0f; + + accessed_this_frame := false; + } + + animation_states : Map(UI_Id, Animation_State); + + get_animation :: (id: UI_Id) -> ^Animation_State { + retval := map.get_ptr(^animation_states, id); + if retval == null { + animation_states[id] = .{}; + retval = ^animation_states[id]; + } + + retval.accessed_this_frame = true; + return retval; + } + + has_active_animation :: () -> bool { + for^ animation_states.entries { + if it.value.hover_time != 0.0f || it.value.hover_time != 0.0f do return true; + if it.value.click_time != 0.0f || it.value.click_time != 0.0f do return true; + } + + return false; + } + + + Scroll_State :: struct { + xscroll: f32; + yscroll: f32; + } + + scroll_states : Map(UI_Id, Scroll_State); + + get_site_hash :: macro (site: CallSite, increment := 0) -> UI_Id { + hash :: package core.hash + file_hash := hash.to_u32(site.file); + line_hash := hash.to_u32(site.line); + column_hash := hash.to_u32(site.column); + + return ~~ (file_hash * 0x472839 + line_hash * 0x6849210 + column_hash * 0x1248382 + increment); + } + + color_lerp :: macro (t: f32, c1, c2: Color) => Color.{ + r = c1.r * (1 - t) + c2.r * t, + g = c1.g * (1 - t) + c2.g * t, + b = c1.b * (1 - t) + c2.b * t, + a = c1.a * (1 - t) + c2.a * t, + }; +} diff --git a/src/client/main.onyx b/src/client/main.onyx new file mode 100644 index 0000000..95c545a --- /dev/null +++ b/src/client/main.onyx @@ -0,0 +1,279 @@ + +use package core +use package glfw3 +use package opengles +use package stb_truetype +use package core.intrinsics.onyx { __initialize } +#local onet :: package onyx_net +#local runtime :: package runtime + +#local { + world_shader: Shader; + font: Font; + player: Player; + + chat_font: Font; + + fog_color :: Vector3.{ 0.6, 0.6, 0.6 }; +} + +world: ^World; +selected_block: Vector3i; + +@GlobalVariable +window: GLFWwindow_p; + +create_window :: () => { + #if runtime.compiler_os == .Linux { + glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3); + glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2); + glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API); + } else { + glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3); + glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0); + } + window = glfwCreateWindow(1600, 900, #cstr "Voxel Shooter"); + + glfwMakeContextCurrent(window); + glfwSwapInterval(1); + glfwSetWindowSizeCallback(window, "on_resize"); + glfwSetKeyCallback(window, "on_key"); + glfwSetMouseButtonCallback(window, "on_mouse_button"); +} + +#export "on_resize" (window: GLFWwindow_p, width, height: u32) { + glViewport(0, 0, width, height); + camera_set_window_size(^camera, ~~width, ~~height); + update_view_matrix(); + update_window_matrix(); +} + +cursor_grabbed := false; +toggle_cursor_grabbed :: () { + cursor_grabbed = !cursor_grabbed; + + if cursor_grabbed { + glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED); + + if glfwRawMouseMotionSupported() == GLFW_TRUE { + glfwSetInputMode(window, GLFW_RAW_MOUSE_MOTION, GLFW_TRUE); + } + } else { + glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_NORMAL); + + if glfwRawMouseMotionSupported() == GLFW_TRUE { + glfwSetInputMode(window, GLFW_RAW_MOUSE_MOTION, GLFW_FALSE); + } + } +} + +setup_opengl :: () { + glInit(glfwGetLoadProcAddress()); + + input_bind_glfw_events(window); + + glEnable(GL_TEXTURE); + glEnable(GL_DEPTH_TEST); + glEnable(GL_CULL_FACE); + glFrontFace(GL_CW); + glCullFace(GL_BACK); + glEnable(GL_BLEND); + glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA); + + shaders_init(); + fonts_init(); + immediate_init(); + + world_shader = shader_make("assets/shaders/world.glsl"); + + shader_link_world_matrix_block(world_shader); + shader_set_uniform(world_shader, #cstr "u_fog_start", 50.0f); + shader_set_uniform(world_shader, #cstr "u_fog_range", 10.0f); + + font = font_lookup(.{"./assets/fonts/calibri.ttf", 32}); + chat_font = font_lookup(.{"./assets/fonts/calibri.ttf", 16}); + + shader_use(world_shader); + world = world_make(); + player = player_make(); + player.camera = ^camera; + + __initialize(^camera); + camera_set_fov(^camera, 75); + ww, wh: i32; + glfwGetWindowSize(window, ^ww, ^wh); + camera_set_window_size(^camera, ~~ww, ~~wh); + + update_view_matrix(); + update_world_matrix(); + update_model_matrix(.{0, 0, 0}); + update_window_matrix(); +} + +update :: (dt: f32) { + input_update(); + + if is_key_just_down(GLFW_KEY_ESCAPE) { + if cursor_grabbed { + toggle_cursor_grabbed(); + } else { + glfwSetWindowShouldClose(window, true); + } + } + + if !cursor_grabbed { + if Rect.contains(.{ 200, 200, 200, 200 }, mouse_get_position_vector()) { + if is_button_just_down(GLFW_MOUSE_BUTTON_LEFT) { + toggle_cursor_grabbed(); + } + } + + } else { + player_update(^player, dt); + player_chunk := world_position_to_chunk(world, player.body.pos); + world_move_center(world, player_chunk); + } + + world_update(world, dt); + + if is_key_just_down(GLFW_KEY_F7) { + debug_screen = !debug_screen; + } + + update_world_matrix(); +} + +#local { + debug_screen := true; + game_fps: i32; +} + +draw :: () { + defer ui_end_frame(); + defer input_post_update(); + draw_scene(); + draw_chat(); + + ww, wh: i32; + glfwGetWindowSize(window, ^ww, ^wh); + font_print(font, ~~(ww / 2), ~~(wh / 2), "."); + + if debug_screen { + immediate_set_color(.{1, 0, 1, 0.5}); + immediate_rectangle(0, 0, 528, 220); + + player_chunk := world_position_to_chunk(world, player.body.pos); + font_print(font, 0, 32, "FPS: {}", game_fps); + font_print(font, 0, 64, "Position: {}", camera.position); + font_print(font, 0, 96, "Facing: {}", camera.y_rot * 180 / math.PI); + font_print(font, 0, 128, "Looking at: {}", selected_block); + font_print(font, 0, 160, "Chunk: {}", player_chunk); + // font_print(font, 0, 192, "Chunks loading: {}", world.chunks_to_load.count); + font_print(font, 0, 192, "Heap: {.2}MB Freed: {.2}MB\n", cast(f32) alloc.heap.get_watermark() / (1024 * 1024), cast(f32) alloc.heap.get_freed_size() / (1024 * 1024)); + } + + immediate_flush(); + glfwSwapBuffers(window); +} + +draw_scene :: () { + glClearColor(fog_color.x, fog_color.y, fog_color.z, 1); + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + shader_use(world_shader); + shader_set_uniform(world_shader, #cstr "u_fog_color", fog_color); + shader_set_uniform(world_shader, #cstr "u_texture", 0); + glEnable(GL_DEPTH_TEST); + world_draw(world); + + glLineWidth(2); + chunk_highlight_block(~~selected_block.x, ~~selected_block.y, ~~selected_block.z); +} + +chat_messages: [..] [] u8; +pending_message: [..] u8; + +draw_chat :: () { + glDisable(GL_DEPTH_TEST); + + ww, wh: i32; + glfwGetWindowSize(window, ^ww, ^wh); + immediate_set_color(.{0.2, 0.2, 0.2, 0.8}); + immediate_rectangle(0, ~~(wh - 300), 400, 300); + + y := cast(f32) (wh - 32); + while i := cast(i32) chat_messages.count - 1; i >= 0 { + defer i -= 1; + y -= 18; + font_draw(chat_font, 10, y, chat_messages[i]); + } + + if draw_textbox(.{0, ~~(wh - 32), 400, 32}, ^pending_message) == .Enter_Pressed { + if pending_message.count > 0 { + send_message(string.alloc_copy(pending_message)); + array.clear(^pending_message); + } + } + + send_message :: (message: [] u8) { + packet := new(onet.Packet); + packet.flags |= .Reliable; + packet.data = message; + onet.peer_send(peer, 0, packet); + } +} + +host: ^onet.Host; +peer: ^onet.Peer; + +main_loop :: () { + last := glfwGetTime(); + now := last; + + seconds := 0.0; + frame_count := 0; + + while !glfwWindowShouldClose(window) { + for host->get_events(timeout=0) { + if it.type == .Message { + chat_messages << string.alloc_copy(it.data); + } + } + + glfwPollEvents(); + + now = glfwGetTime(); + dt := now - last; + last = now; + dt = math.clamp(dt, 0, 0.5); + + seconds += dt; + frame_count += 1; + if seconds >= 1 { + game_fps = ~~frame_count; + seconds -= 1; + frame_count = 0; + } + + update(cast(f32) dt); + draw(); + } +} + +main :: (args) => { + if !glfwInit() { + println("Failed to initialize GLFW"); + os.exit(1); + } + + addr: net.Socket_Address; + addr.addr = 0x7f000001; + addr.port = 5123; + host', _ := onet.host_create(null, 1); + println(_); + peer = onet.host_connect(host, ^addr, 2); + + create_window(); + setup_opengl(); + main_loop(); +} diff --git a/src/client/utils/camera.onyx b/src/client/utils/camera.onyx new file mode 100644 index 0000000..c8bc72d --- /dev/null +++ b/src/client/utils/camera.onyx @@ -0,0 +1,91 @@ +use package core + +@GlobalVariable +camera: Camera; + +Camera :: struct { + fov: f32; // Radians + window_width, window_height: f32; + + z_near := 0.01f; + z_far := 300.0f; + + x_rot, y_rot: f32; + position: Vector3; +} + +camera_set_fov :: (cam: ^Camera, fov: f32) { + cam.fov = fov * math.PI / 180; + cam.fov = math.clamp(cam.fov, 0, math.PI - 0.001f); +} + +camera_set_window_size :: (use cam: ^Camera, ww, wh: f32) { + window_width = ww; + window_height = wh; +} + +camera_get_view_matrix :: (use cam: ^Camera, out: [16] f32) { + ar := window_width / window_height; + z_range := z_far - z_near; + tan_half_fov := math.sin(fov / 2) / math.cos(fov / 2); + + out[0] = 1 / (tan_half_fov * ar); + out[5] = 1 / tan_half_fov; + out[10] = -z_far / z_range; + out[11] = -1; + out[14] = -z_far*z_near/z_range; +} + +camera_get_forward :: (use cam: ^Camera) -> Vector3 { + return Vector3.{ + math.cos(x_rot) * math.sin(y_rot), + -math.sin(x_rot), + math.cos(y_rot) * math.cos(x_rot) + } |> Vector3.norm(); +} + +camera_get_world_matrix :: (use cam: ^Camera, out: [16] f32) { + forward := Vector3.{ + math.cos(x_rot) * math.sin(y_rot), + -math.sin(x_rot), + math.cos(y_rot) * math.cos(x_rot) + } |> Vector3.norm(); + + side := Vector3.cross(forward, .{0,1,0}) |> Vector3.norm(); + new_up := Vector3.cross(side, forward); + + neg_pos := Vector3.neg(position); + neg_forward := Vector3.neg(forward); + + out[0] = side.x; + out[1] = new_up.x; + out[2] = neg_forward.x; + out[4] = side.y; + out[5] = new_up.y; + out[6] = neg_forward.y; + out[8] = side.z; + out[9] = new_up.z; + out[10] = neg_forward.z; + out[12] = Vector3.dot(side, neg_pos); + out[13] = Vector3.dot(new_up, neg_pos); + out[14] = Vector3.dot(neg_forward, neg_pos); + out[15] = 1; +} + +camera_get_window_matrix :: (use cam: ^Camera, out: [16] f32) { + top := 0.0f; + left := 0.0f; + right := cast(f32) window_width; + bottom := cast(f32) window_height; + far := 10.0f; + near := 0f; + + out[0] = 2 / (right - left); + out[5] = 2 / (top - bottom); + out[10] = -2 / (far - near); + out[12] = -(right + left) / (right - left); + out[13] = -(top + bottom) / (top - bottom); + out[14] = -(far + near) / (far - near); + out[15] = 1; +} + diff --git a/src/client/utils/colors.onyx b/src/client/utils/colors.onyx new file mode 100644 index 0000000..ab6231d --- /dev/null +++ b/src/client/utils/colors.onyx @@ -0,0 +1,55 @@ + +use package core + +Color :: struct { + r, g, b : f32; + a := 1.0f; +} + +color_to_hsl :: (c: Color) -> (h: f32, s: f32, l: f32) { + r := c.r / 255; + g := c.g / 255; + b := c.b / 255; + cmax := math.max(math.max(r, g), b); + cmin := math.min(math.min(r, g), b); + delta := cmax - cmin; + + h := 0.0f; + if cmax == r { + m := (g - b) / delta; + while m >= 6 do m -= 6; + while m < 0 do m += 6; + h = 60 * m; + } + if cmax == g do h = 60 * (b - r) / delta + 2; + if cmax == b do h = 60 * (r - g) / delta + 4; + + l := (cmax + cmin) / 2; + s := delta / (1 - math.abs(2 * l - 1)); + + return h, s, l; +} + +hsl_to_color :: (h, s, l: f32) -> Color { + c := (1 - math.abs(2 * l - 1)) * s; + + h_term := h / 60; + while h_term < 0 do h_term += 2; + while h_term >= 0 do h_term -= 2; + + x := c * (1 - math.abs(h_term - 1)); + m := l - c / 2; + + r, g, b: f32; + if 0 <= h && h < 60 { r = c; g = x; b = 0; } + if 60 <= h && h < 120 { r = x; g = c; b = 0; } + if 120 <= h && h < 180 { r = 0; g = c; b = x; } + if 180 <= h && h < 240 { r = 0; g = x; b = c; } + if 240 <= h && h < 300 { r = x; g = 0; b = c; } + if 300 <= h && h < 360 { r = c; g = 0; b = x; } + + r = (r + m) * 255; + g = (g + m) * 255; + b = (b + m) * 255; + return .{ r, g, b, 1 }; +} diff --git a/src/client/utils/input.onyx b/src/client/utils/input.onyx new file mode 100644 index 0000000..798eefe --- /dev/null +++ b/src/client/utils/input.onyx @@ -0,0 +1,172 @@ +use package core +use package glfw3 + +// If you are offseting the mouse coordinate for world space +// or UI scrolling etc., set this function to be the function +// to ask for the current offset. Currently scaling the mouse +// coordinate is not supported, only linear translations. +Mouse_Offset_Function :: immediate_get_scroll + + +#local { + keys_this_frame : Set(Key_Descriptor) // Keys currently being pressed this frame + keys_last_frame : Set(Key_Descriptor) // Keys being pressed in the last frame + + key_codepoints : [..] u32 + + buttons_this_frame: [8] bool // Mouse buttons being pressed this frame + buttons_last_frame: [8] bool // Mouse buttons being pressed last frame + + scroll_x: f64 + scroll_y: f64 + + character_mode := false; +} + +#init () { + set.init(^keys_this_frame); + set.init(^keys_last_frame); +} + +Key_Descriptor :: struct { + key: u32; + scancode: u32 = 0; + mod: u32 = 0; +} +#match hash.to_u32 (use x: Key_Descriptor) => hash.to_u32(key); +#operator == (x, y: Key_Descriptor) => x.key == y.key; + +input_update :: () { + glfwGetCursorPos(window, ^mouse_x, ^mouse_y); +} + +input_post_update :: () { + set.clear(^keys_last_frame); + for keys_this_frame.entries do keys_last_frame << it.value; + + for 8 do buttons_last_frame[it] = buttons_this_frame[it]; + + last_mouse_x = mouse_x; + last_mouse_y = mouse_y; + scroll_x = 0; + scroll_y = 0; + + array.clear(^key_codepoints); +} + +input_get_chars_this_frame :: () -> [] u32 { + return key_codepoints; +} + +input_get_keys_this_frame :: () -> Set(Key_Descriptor) { + return keys_this_frame; +} + +input_capture_keys :: () { + character_mode = true; +} + +input_release_keys :: () { + character_mode = false; +} + +is_key_down :: (key) => !character_mode && set.has(^keys_this_frame, .{key}); +is_key_just_down :: (key) => !character_mode && set.has(^keys_this_frame, .{key}) && !set.has(^keys_last_frame, .{key}); +is_key_just_up :: (key) => !character_mode && !set.has(^keys_this_frame, .{key}) && set.has(^keys_last_frame, .{key}); + +is_button_down :: (button) => buttons_this_frame[button]; +is_button_just_down :: (button) => buttons_this_frame[button] && !buttons_last_frame[button]; +is_button_just_up :: (button) => !buttons_this_frame[button] && buttons_last_frame[button]; + +#local { + last_mouse_x: f64; + last_mouse_y: f64; + + mouse_x: f64; + mouse_y: f64; +} + +mouse_get_delta :: () -> (f64, f64) { + return mouse_x - last_mouse_x, mouse_y - last_mouse_y; +} + +mouse_get_delta_vector :: () -> Vector2 { + dmx, dmy := mouse_get_delta(); + return .{ ~~dmx, ~~dmy }; +} + +mouse_get_position :: () -> (f64, f64) { + mx, my := mouse_x, mouse_y; + #if #defined(Mouse_Offset_Function) { + scroll := Mouse_Offset_Function(); + mx -= ~~ scroll.x; + my -= ~~ scroll.y; + } + return mx, my; +} + +mouse_get_position_vector :: () -> Vector2 { + mx, my := mouse_x, mouse_y; + #if #defined(Mouse_Offset_Function) { + scroll := Mouse_Offset_Function(); + mx -= ~~ scroll.x; + my -= ~~ scroll.y; + } + return .{ ~~mx, ~~my }; +} + +mouse_get_scroll :: () -> (f64, f64) { + return scroll_x, scroll_y; +} + +mouse_get_scroll_vector :: () -> Vector2 { + return .{ ~~scroll_x, ~~scroll_y }; +} + +input_bind_glfw_events :: (window: GLFWwindow_p) { + glfwSetKeyCallback(window, INPUT_KEY_EVENT); + glfwSetCharCallback(window, INPUT_CHAR_EVENT); + glfwSetMouseButtonCallback(window, INPUT_BUTTON_EVENT); + glfwSetScrollCallback(window, INPUT_SCROLL_EVENT); +} + +#local { + INPUT_BUTTON_EVENT :: "__input_button_event" + INPUT_KEY_EVENT :: "__input_key_event" + INPUT_SCROLL_EVENT :: "__input_scroll_event" + INPUT_CHAR_EVENT :: "__input_char_event" +} + +#export INPUT_BUTTON_EVENT (window: GLFWwindow_p, button, action, mod: u32) { + if action == GLFW_PRESS { + buttons_this_frame[button] = true; + } + + if action == GLFW_RELEASE { + buttons_this_frame[button] = false; + } +} + +#export INPUT_KEY_EVENT (window: GLFWwindow_p, key, scancode, action, mod: u32) { + if action == GLFW_PRESS { + keys_this_frame << .{ key, scancode, mod }; + } + + if action == GLFW_REPEAT { + set.remove(^keys_last_frame, .{key}); + } + + if action == GLFW_RELEASE { + set.remove(^keys_this_frame, .{ key }); + } +} + +#export INPUT_CHAR_EVENT (window: GLFWwindow_p, codepoint: u32) { + if !character_mode do return; + key_codepoints << codepoint; +} + +#export INPUT_SCROLL_EVENT (window: GLFWwindow_p, xoff, yoff: f64) { + scroll_x = xoff; + scroll_y = yoff; +} diff --git a/src/client/utils/logger.onyx b/src/client/utils/logger.onyx new file mode 100644 index 0000000..57b0ffc --- /dev/null +++ b/src/client/utils/logger.onyx @@ -0,0 +1,57 @@ +// +// This may become an in-game or external file logger in the future, +// but for now this is just for logging to the command line. + +use package core + +Enable_Log_Colors :: false + +Log_Level :: enum { + Debug; + Info; + Warning; + Error; + Critical; +} + +debug_set_level :: (level: Log_Level) { + log_level = level; +} + +debug_log :: (level: Log_Level, format: str, args: ..any) { + debug_log_va(level, format, ~~args); +} + +debug_log_va :: (level: Log_Level, format: str, args: [] any) { + if level < log_level do return; + + buf: [2048] u8; + output := conv.format_va(buf, format, args); + #if Enable_Log_Colors { + color_spec: str; + switch level { + case .Critical do color_spec = "1;91"; + case .Error do color_spec = "1;31"; + case .Warning do color_spec = "1;33"; + case .Info do color_spec = "94"; + } + + printf("\x1b[{}m[{w5}] {}\x1b[0m\n", color_spec, level_string(level), output); + } else { + printf("[{w5}] {}\n", level_string(level), output); + } +} + +#local level_string :: (level: Log_Level) => { + switch level { + case .Debug do return "DEBUG"; + case .Info do return "INFO"; + case .Warning do return "WARN"; + case .Error do return "ERROR"; + case .Critical do return "CRIT"; + } + + return ""; +} + +#local log_level := Log_Level.Debug; \ No newline at end of file diff --git a/src/client/utils/utils.onyx b/src/client/utils/utils.onyx new file mode 100644 index 0000000..25a9873 --- /dev/null +++ b/src/client/utils/utils.onyx @@ -0,0 +1,72 @@ +use package core + +Ray :: struct { + origin, direction: Vector3; +} + + +ray_cast :: (ray: Ray, max_distance: f32, ctx: rawptr, is_solid: (rawptr, Vector3i) -> bool, out_block: ^Vector3i, out_dir: ^Vector3i) -> bool { + pos := Vector3i.{ ~~math.floor(ray.origin.x), ~~math.floor(ray.origin.y), ~~math.floor(ray.origin.z) }; + + dir := ray.direction; + step := Vector3i.{ ~~math.sign(dir.x), ~~math.sign(dir.y), ~~math.sign(dir.z) }; + + tmax: Vector3; + tmax.x = ((math.ceil(ray.origin.x) - ray.origin.x) if dir.x > 0 else (ray.origin.x - math.floor(ray.origin.x))) / math.abs(dir.x); + tmax.y = ((math.ceil(ray.origin.y) - ray.origin.y) if dir.y > 0 else (ray.origin.y - math.floor(ray.origin.y))) / math.abs(dir.y); + tmax.z = ((math.ceil(ray.origin.z) - ray.origin.z) if dir.z > 0 else (ray.origin.z - math.floor(ray.origin.z))) / math.abs(dir.z); + + tdelta := Vector3.{ ~~step.x / dir.x, ~~step.y / dir.y, ~~step.z / dir.z }; + radius := max_distance / Vector3.mag(dir); + + while true { + if is_solid(ctx, pos) { + *out_block = pos; + return true; + } + + if tmax.x < tmax.y { + if tmax.x < tmax.z { + if tmax.x > radius { + break; + } + + pos.x += step.x; + tmax.x += tdelta.x; + *out_dir = .{ -step.x, 0, 0 }; + + } else { + if tmax.z > radius { + break; + } + + pos.z += step.z; + tmax.z += tdelta.z; + *out_dir = .{ 0, 0, -step.z }; + } + + } else { + if tmax.y < tmax.z { + if tmax.y > radius { + break; + } + + pos.y += step.y; + tmax.y += tdelta.y; + *out_dir = .{ 0, -step.y, 0 }; + + } else { + if tmax.z > radius { + break; + } + + pos.z += step.z; + tmax.z += tdelta.z; + *out_dir = .{ 0, 0, -step.z }; + } + } + } + + return false; +} + diff --git a/src/client/utils/vecmath.onyx b/src/client/utils/vecmath.onyx new file mode 100644 index 0000000..c3e02e3 --- /dev/null +++ b/src/client/utils/vecmath.onyx @@ -0,0 +1,167 @@ +#local hash :: package core.hash + +Vector2i :: struct { + x, y: i32; + + #struct_tag conv.Custom_Format.{format_vector2i} + #struct_tag conv.Custom_Parse.{parse_vector2i} +} + +Vector2 :: struct { + x, y: f32; + + mag :: macro (v: Vector2) => math.sqrt(v.x * v.x + v.y * v.y); + + square_mag :: macro (v: Vector2) => v.x * v.x + v.y * v.y; + + norm :: macro (v: Vector2) -> Vector2 { + l := math.sqrt(v.x * v.x + v.y * v.y); + return .{ v.x / l, v.y / l }; + } + + + Zero :: Vector2.{0, 0} + + #struct_tag conv.Custom_Format.{format_vector2} + #struct_tag conv.Custom_Parse.{parse_vector2} +} + +Vector3i :: struct { + x, y, z: i32; + #struct_tag conv.Custom_Format.{format_vector3i} +} + +Vector3 :: struct { + x, y, z: f32; + + mag :: macro (v: Vector3) => math.sqrt(v.x * v.x + v.y * v.y + v.z * v.z); + + neg :: macro (v: Vector3) => Vector3.{ -v.x, -v.y, -v.z }; + + dot :: macro (v1, v2: Vector3) -> f32 { + return v1.x * v2.x + v1.y * v2.y + v1.z * v2.z; + } + + norm :: macro (v: Vector3) -> Vector3 { + l := math.sqrt(v.x * v.x + v.y * v.y + v.z * v.z); + return .{ v.x / l, v.y / l, v.z / l }; + } + + cross :: macro (v1, v2: Vector3) -> Vector3 { + return .{ + v1.y * v2.z - v1.z * v2.y, + v1.z * v2.x - v1.x * v2.z, + v1.x * v2.y - v1.y * v2.x, + }; + } + + clamp :: macro (v: Vector3, min: Vector3, max: Vector3) -> Vector3 { + return .{ + math.clamp(v.x, min.x, max.x), + math.clamp(v.y, min.y, max.y), + math.clamp(v.z, min.z, max.z), + }; + } + + #struct_tag conv.Custom_Format.{format_vector3} +} + +#operator + macro (v1, v2: Vector2i) => (typeof v1).{ v1.x + v2.x, v1.y + v2.y }; +#operator - macro (v1, v2: Vector2i) => (typeof v1).{ v1.x - v2.x, v1.y - v2.y }; +#operator * macro (v: Vector2i, s: i32) => (typeof v ).{ v.x * s, v.y * s }; +#operator * macro (v1, v2: Vector2i) => (typeof v1).{ v1.x * v2.x, v1.y * v2.y }; +#operator == macro (v1, v2: Vector2i) => v1.x == v2.x && v1.y == v2.y; +#match hash.to_u32 macro (v: Vector2i) => 13 * v.x + 17 * v.y; + +#operator + macro (v1, v2: Vector2) => (typeof v1).{ v1.x + v2.x, v1.y + v2.y }; +#operator - macro (v1, v2: Vector2) => (typeof v1).{ v1.x - v2.x, v1.y - v2.y }; +#operator * macro (v: Vector2, s: f32) => (typeof v ).{ v.x * s, v.y * s }; +#operator * macro (v1, v2: Vector2) => (typeof v1).{ v1.x * v2.x, v1.y * v2.y }; +#operator == macro (v1, v2: Vector2) => v1.x == v2.x && v1.y == v2.y; + +#operator + macro (v1, v2: Vector3) => Vector3.{ v1.x + v2.x, v1.y + v2.y, v1.z + v2.z }; +#operator - macro (v1, v2: Vector3) => Vector3.{ v1.x - v2.x, v1.y - v2.y, v1.z - v2.z }; +#operator * macro (v: Vector3, s: f32) => Vector3.{ v.x * s, v.y * s, v.z * s }; +#operator * macro (v1, v2: Vector3) => (typeof v1).{ v1.x * v2.x, v1.y * v2.y, v1.z * v3.z }; +#operator == macro (v1, v2: Vector3) => v1.x == v2.x && v1.y == v2.y && v1.z == v2.z; + +#operator + macro (v1, v2: Vector3i) => Vector3i.{ v1.x + v2.x, v1.y + v2.y, v1.z + v2.z }; +#operator - macro (v1, v2: Vector3i) => Vector3i.{ v1.x - v2.x, v1.y - v2.y, v1.z - v2.z }; +#operator * macro (v: Vector3i, s: i32) => Vector3i.{ v.x * s, v.y * s, v.z * s }; +#operator * macro (v1, v2: Vector3i) => (typeof v1).{ v1.x * v2.x, v1.y * v2.y, v1.z * v3.z }; +#operator == macro (v1, v2: Vector3i) => v1.x == v2.x && v1.y == v2.y && v1.z == v2.z; + +#local { + conv :: package core.conv + + format_vector2i :: (output: ^conv.Format_Output, format: ^conv.Format, v: ^Vector2i) { + conv.format(output, "({}, {})", v.x, v.y); + } + + format_vector2 :: (output: ^conv.Format_Output, format: ^conv.Format, v: ^Vector2) { + conv.format(output, "({}, {})", v.x, v.y); + } + + format_vector3 :: (output: ^conv.Format_Output, format: ^conv.Format, v: ^Vector3) { + conv.format(output, "({}, {}, {})", v.x, v.y, v.z); + } + + format_vector3i :: (output: ^conv.Format_Output, format: ^conv.Format, v: ^Vector3i) { + conv.format(output, "({}, {}, {})", v.x, v.y, v.z); + } + + parse_vector2i :: (output: ^Vector2i, line_: str, string_allocator: Allocator) -> bool { + string :: package core.string + + line := line_; + xs := string.read_until(^line, #char " "); + string.advance(^line, 1); + ys := string.read_until(^line, #char " "); + + if xs == "" || ys == "" do return false; + + output.x = ~~ conv.str_to_i64(xs); + output.y = ~~ conv.str_to_i64(ys); + return true; + } + + parse_vector2 :: (output: ^Vector2, line_: str, string_allocator: Allocator) -> bool { + string :: package core.string + + line := line_; + xs := string.read_until(^line, #char " "); + string.advance(^line, 1); + ys := string.read_until(^line, #char " "); + + if xs == "" || ys == "" do return false; + + output.x = ~~ conv.str_to_f64(xs); + output.y = ~~ conv.str_to_f64(ys); + return true; + } +} + + + +Rect :: struct { + x, y, w, h: f32; + + intersects :: (r1, r2: Rect) -> bool { + return r1.x < r2.x + r2.w + && r1.x + r1.w > r2.x + && r1.y < r2.y + r2.h + && r1.y + r1.h > r2.y; + } + + contains :: (r: Rect, p: Vector2) -> bool { + return r.x <= p.x && r.x + r.w >= p.x + && r.y <= p.y && r.y + r.h >= p.y; + } + + center :: macro (use r: Rect) => Vector2.{ r.x+r.w/2, r.y+r.h/2 }; + + top_left :: macro (use r: Rect) => Vector2.{ r.x, r.y }; + top_right :: macro (use r: Rect) => Vector2.{ r.x+r.w, r.y }; + bottom_left :: macro (use r: Rect) => Vector2.{ r.x, r.y+r.h }; + bottom_right :: macro (use r: Rect) => Vector2.{ r.x+r.w, r.y+r.h }; +} diff --git a/src/client/world/chunk.onyx b/src/client/world/chunk.onyx new file mode 100644 index 0000000..bba0ce1 --- /dev/null +++ b/src/client/world/chunk.onyx @@ -0,0 +1,254 @@ +use package core +use package opengles + +Block :: #distinct u32; +#operator == macro (b1, b2: Block) => cast(u32) b1 == cast(u32) b2; +#operator != macro (b1, b2: Block) => cast(u32) b1 != cast(u32) b2; + +Block_Empty :: cast(Block) 0; + +Block_Options :: struct { + texture_enabled := true; +} + +block_make :: (red, green, blue: f32, brightness: f32, options := Block_Options.{}) -> Block { + r := cast(u32) (red * 15.0f); + g := cast(u32) (green * 15.0f); + b := cast(u32) (blue * 15.0f); + i := cast(u32) (brightness * 15.0f); + + tex := 1 if options.texture_enabled else 0; + + return ~~((tex << 16) | (i << 12) | (b << 8) | (g << 4) | r); +} + +Chunk_Vertex :: struct { + position : Vector3; + texture : Vector2; + + // This field is broken up by bit, but Onyx does not (nor ever will) support bit-fields. + // + // 4-bits (0..3) - red color + // 4-bits (4..7) - green color + // 4-bits (8..11) - blue color + // 4-bits (12..15) - intensity + data: u32; +} + +Chunk_Size :: 32 + +Chunk :: struct { + coord: Vector3i; + position: Vector3; + blocks: [] Block; + + mesh: ^Mesh(Chunk_Vertex) = null; + mesh_dirty := false; +} + +chunk_make :: (x, y, z: i32, allocator := context.allocator) -> ^Chunk { + chunk := new(Chunk, allocator); + chunk.coord = .{ x, y, z }; + chunk.position = .{ + ~~(x * Chunk_Size), + ~~(y * Chunk_Size), + ~~(z * Chunk_Size), + }; + memory.alloc_slice(^chunk.blocks, Chunk_Size * Chunk_Size * Chunk_Size); + memory.fill_slice(chunk.blocks, Block_Empty); + return chunk; +} + +chunk_free :: (chunk: ^Chunk) { + chunk_destroy_mesh(chunk); + memory.free_slice(^chunk.blocks); + cfree(chunk); +} + +#local in_chunk_bounds :: macro (x, y, z: i32) -> bool { + if x < 0 do return false; + if x >= Chunk_Size do return false; + if y < 0 do return false; + if y >= Chunk_Size do return false; + if z < 0 do return false; + if z >= Chunk_Size do return false; + return true; +} + +chunk_coords_to_world :: (use chunk: ^Chunk, x, y, z: i32) -> Vector3i { + return coord * Chunk_Size + .{x,y,z}; +} + +chunk_set :: (use chunk: ^Chunk, x, y, z: i32, block: Block) { + if !in_chunk_bounds(x, y, z) do return; + blocks[x * Chunk_Size * Chunk_Size + y * Chunk_Size + z] = block; + mesh_dirty = true; +} + +chunk_get :: (use chunk: ^Chunk, x, y, z: i32) -> Block { + if !in_chunk_bounds(x, y, z) do return Block_Empty; + return blocks[x * Chunk_Size * Chunk_Size + y * Chunk_Size + z]; +} + +#local block_neighbors := Vector3i.[ + Vector3i.{ 0, 0, -1 }, + Vector3i.{ 1, 0, 0 }, + Vector3i.{ -1, 0, 0 }, + Vector3i.{ 0, 0, 1 }, + Vector3i.{ 0, 1, 0 }, + Vector3i.{ 0, -1, 0 }, +]; + +#local block_verticies := Vector3.[ + Vector3.{ 0, 0, 0 }, + Vector3.{ 0, 1, 0 }, + Vector3.{ 1, 1, 0 }, + Vector3.{ 1, 0, 0 }, + Vector3.{ 0, 0, 1 }, + Vector3.{ 0, 1, 1 }, + Vector3.{ 1, 1, 1 }, + Vector3.{ 1, 0, 1 }, +]; + +#local block_textures := Vector2.[ + Vector2.{ 0, 0 }, + Vector2.{ 0, 1 }, + Vector2.{ 1, 1 }, + Vector2.{ 1, 0 }, +]; + +#local block_texture_indicies := ([6] u32).[ + u32.[ 0, 2, 1, 0, 3, 2 ], + u32.[ 0, 2, 1, 0, 3, 2 ], + u32.[ 0, 2, 1, 0, 3, 2 ], + u32.[ 0, 1, 2, 0, 2, 3 ], + u32.[ 0, 1, 2, 0, 2, 3 ], + u32.[ 0, 1, 2, 0, 2, 3 ], +]; + +#local block_indicies := ([6] u32).[ + u32.[ 0, 2, 1, 0, 3, 2 ], + u32.[ 3, 6, 2, 3, 7, 6 ], + u32.[ 5, 0, 1, 5, 4, 0 ], + u32.[ 4, 5, 6, 4, 6, 7 ], + u32.[ 5, 1, 2, 5, 2, 6 ], + u32.[ 0, 4, 7, 0, 7, 3 ] +]; + +chunk_build_mesh :: (use chunk: ^Chunk) { + if mesh != null && mesh_dirty == false do return; + if mesh != null { + mesh_free(mesh); + mesh = null; + } + + verticies := array.make(Chunk_Vertex, capacity=512); + defer array.free(^verticies); + + chunk_foreach(chunk) { + if block == Block_Empty do continue; + + for i: 6 { + n := ^block_neighbors[i]; + nx := x + n.x; + ny := y + n.y; + nz := z + n.z; + + if chunk_get(chunk, nx, ny, nz) != Block_Empty do continue; + color := block; + l := ~~((cast(u32) color & 0xf000) >> 12) / 16.0f; + if i != 4 do l *= 0.75; + if i == 5 do l *= 0.75; + color = cast(Block) (((cast(u32) (l * 16.0f)) << 12) | (0xffff0fff & cast(u32) color)); + + indicies := cast([] u32) block_indicies[i]; + tex_indicies := cast([] u32) block_texture_indicies[i]; + for j: 6 { + v := block_verticies[indicies[j]]; + t := block_textures[tex_indicies[j]]; + verticies << .{ .{ ~~x+v.x, ~~y+v.y, ~~z+v.z }, t, ~~color }; + } + } + } + + mesh = mesh_make(verticies, .[]); + mesh_dirty = false; +} + +chunk_destroy_mesh :: (use chunk: ^Chunk) { + if mesh == null do return; + + mesh_free(mesh); + mesh = null; + + mesh_dirty = true; // Just in case this chunk will be reused later. +} + +#local block_texture: Texture; +chunk_draw :: (chunk: ^Chunk) { + if block_texture.filename.data == null { + block_texture', _ := texture_lookup("assets/textures/block.png"); + } + + texture_use(^block_texture); + update_model_matrix(chunk.position); + mesh_draw(chunk.mesh); +} + + +// Provides x, y, z, and block in the body +chunk_foreach :: macro (chunk: ^Chunk, body: Code) { + for x: Chunk_Size do for y: Chunk_Size do for z: Chunk_Size { + block := chunk.blocks[x * Chunk_Size * Chunk_Size + y * Chunk_Size + z]; + #unquote body; + } +} + +#local block_highlight: ^Mesh(Chunk_Vertex); +chunk_highlight_block :: (x, y, z: f32) { + data := 0xf000; + + vertex_data := cast(^Chunk_Vertex) alloc.from_stack(sizeof Chunk_Vertex * 8); + vertex_data[0] = .{.{x-0.001,y-0.001,z-0.001},.{0,0},data}; + vertex_data[1] = .{.{x-0.001,y+1.001,z-0.001},.{0,0},data}; + vertex_data[2] = .{.{x+1.001,y+1.001,z-0.001},.{0,0},data}; + vertex_data[3] = .{.{x+1.001,y-0.001,z-0.001},.{0,0},data}; + vertex_data[4] = .{.{x-0.001,y-0.001,z+1.001},.{0,0},data}; + vertex_data[5] = .{.{x-0.001,y+1.001,z+1.001},.{0,0},data}; + vertex_data[6] = .{.{x+1.001,y+1.001,z+1.001},.{0,0},data}; + vertex_data[7] = .{.{x+1.001,y-0.001,z+1.001},.{0,0},data}; + + if block_highlight == null { + #persist index_data := u32.[ + 2, 1, 1, 0, // back + 0, 3, 3, 2, + + 6, 2, 2, 3, // right side + 3, 7, 7, 6, + + 0, 1, 1, 5, // left side + 5, 4, 4, 0, + + 4, 5, 5, 6, // front + 6, 7, 7, 4, + + 5, 1, 1, 2, // top + 2, 6, 6, 5, + + 0, 4, 4, 7, // bottom + 7, 3, 3, 0, + ]; + + mesh := mesh_make(vertex_data[0..8], index_data); + mesh.primitive = GL_LINES; + block_highlight = mesh; + + } else { + mesh_update_verticies(block_highlight, vertex_data[0 .. 8]); + } + + update_model_matrix(.{0,0,0}); + mesh_draw(block_highlight); +} + + diff --git a/src/client/world/physics.onyx b/src/client/world/physics.onyx new file mode 100644 index 0000000..746e39d --- /dev/null +++ b/src/client/world/physics.onyx @@ -0,0 +1,65 @@ +use package core + +AABB :: struct { + x0, y0, z0, x1, y1, z1: f32; + + intersects :: (a1, a2: AABB) -> bool { + return a1.x0 < a2.x1 && a1.x1 > a2.x0 + && a1.y0 < a2.y1 && a1.y1 > a2.y0 + && a1.z0 < a2.z1 && a1.z1 > a2.z0; + } + + contains :: (a: AABB, v: Vector3) -> bool { + return a.x0 < v.x && v.x < a.x1 + && a.y0 < v.y && v.y < a.y1 + && a.z0 < v.z && v.z < a.z1; + } +} + +PhysicsBody :: struct { + pos: Vector3; + vel: Vector3; + acc: Vector3; + + on_ground := false; + + get_collision_object: (pos: Vector3) -> AABB; // This will get expanded on when other collision objects are defined +} + +physics_apply_gravity :: (use body: ^PhysicsBody) { + acc.y = -30; +} + +physics_simulate :: (use body: ^PhysicsBody, dt: f32, world: ^World) { + aabb_buffer := (cast(^AABB) alloc.from_stack(sizeof [256] AABB))[0..256]; + + aabbs := world_get_aabbs(world, pos, 3, aabb_buffer); + try_move :: macro (delta: Vector3) -> f32 { + new_pos := body.pos + delta; + body_aabb := get_collision_object(new_pos); + + for^ aabbs { + if AABB.intersects(body_aabb, *it) { + if delta.y < 0 do on_ground = true; + return 0; + } + } + + return 1; + } + + on_ground = false; + move_x := try_move(.{acc.x*0.5*dt*dt + vel.x * dt, 0, 0}); + move_y := try_move(.{0, acc.y*0.5*dt*dt + vel.y * dt, 0}); + move_z := try_move(.{0, 0, acc.z*0.5*dt*dt + vel.z * dt}); + + pos.x += vel.x * dt * move_x; + pos.y += vel.y * dt * move_y; + pos.z += vel.z * dt * move_z; + + vel += acc * dt; + + if on_ground do vel.y = 0; +} + + diff --git a/src/client/world/player.onyx b/src/client/world/player.onyx new file mode 100644 index 0000000..7b93b22 --- /dev/null +++ b/src/client/world/player.onyx @@ -0,0 +1,101 @@ +use package core +use package glfw3 + +Player :: struct { + camera: ^Camera; // Should the camera exist on the player? Or should the player just control the camera? + body: PhysicsBody; +} + +player_make :: () -> Player { + player: Player; + + player.camera = null; + player.body = .{ + .{0,80,0}, + .{0,0,0}, + .{0,0,0}, + + get_collision_object = player_get_aabb + }; + + return player; +} + +player_update :: (use player: ^Player, dt: f32) { + if world_get_chunk(world, world_position_to_chunk(world, body.pos)) == null do return; + + speed := 6f; + if is_key_down(GLFW_KEY_LEFT_CONTROL) { + speed = 10; + } + if is_key_down(GLFW_KEY_LEFT_SHIFT) { + speed = 1; + } + + mdx, mdy := mouse_get_delta(); + camera.y_rot += ~~(-mdx / 400); + camera.x_rot += ~~( mdy / 400); + while camera.y_rot >= 2 * math.PI do camera.y_rot -= 2 * math.PI; + while camera.y_rot < 0 do camera.y_rot += 2 * math.PI; + camera.x_rot = math.clamp(camera.x_rot, -math.PI / 2 + 0.01, math.PI / 2 - 0.01); + + forward := camera_get_forward(camera); + facing := forward; + facing.y = 0; + facing = Vector3.norm(facing); + + xz_vel := Vector3.{0,0,0}; + if is_key_down(GLFW_KEY_W) do xz_vel += facing; + if is_key_down(GLFW_KEY_S) do xz_vel -= facing; + if is_key_down(GLFW_KEY_D) do xz_vel += Vector3.norm(Vector3.cross(facing, .{0,1,0})); + if is_key_down(GLFW_KEY_A) do xz_vel -= Vector3.norm(Vector3.cross(facing, .{0,1,0})); + + if Vector3.mag(xz_vel) > 0 do xz_vel = Vector3.norm(xz_vel) * speed; + body.vel.x = xz_vel.x; + body.vel.z = xz_vel.z; + + physics_apply_gravity(^body); + + if is_key_down(GLFW_KEY_SPACE) && body.on_ground { + body.acc.y = 500; + } + + if is_key_down(GLFW_KEY_B) && body.on_ground { + // Yeet yourself. + body.acc.y = 10000; + } + + physics_simulate(^body, dt, world); + + // Fix falling off the world + if body.pos.y < -100 do body.pos = .{0,48,0}; + + camera.position = body.pos; + + ray_cast_to_block :: (_, p) => world_get_block(world, p.x, p.y, p.z) != Block_Empty; + + dir: Vector3i; + if !ray_cast(.{ camera.position, forward }, 10, null, ray_cast_to_block, ^selected_block, ^dir) { + selected_block = .{0,0,0}; + } + + if is_button_just_down(GLFW_MOUSE_BUTTON_LEFT) { + world_set_block(world, selected_block.x, selected_block.y, selected_block.z, Block_Empty); + } + + if is_button_just_down(GLFW_MOUSE_BUTTON_RIGHT) { + target := selected_block + dir; + world_set_block(world, target.x, target.y, target.z, block_make(1,0,0,1)); + } +} + +player_get_aabb :: (pos: Vector3) -> AABB { + return .{ + x0 = pos.x - 0.3f, + y0 = pos.y - 1.8f, + z0 = pos.z - 0.3f, + x1 = pos.x + 0.3f, + y1 = pos.y + 0.1f, + z1 = pos.z + 0.3f, + }; +} diff --git a/src/client/world/world.onyx b/src/client/world/world.onyx new file mode 100644 index 0000000..397b380 --- /dev/null +++ b/src/client/world/world.onyx @@ -0,0 +1,207 @@ + +use package core + +World :: struct { + chunk_dist: i32; + chunks: [] ^Chunk; + + center_chunk: Vector3i; + + chunks_to_load: [..] Vector3i; +} + +world_make :: (allocator := context.allocator) -> ^World { + world := new(World, allocator); + world.chunk_dist = 2; + world.center_chunk = .{0,0,0}; + + sl := world.chunk_dist * 2 + 1; + memory.alloc_slice(^world.chunks, sl * sl * sl); + memory.fill_slice(world.chunks, null); + + return world; +} + +world_load_chunk :: (world: ^World, chunk_to_load: Vector3i) { + // + // For now, no persistence will happen to the chunk, so generate a completely new chunk. + // + chunk := chunk_make(chunk_to_load.x, chunk_to_load.y, chunk_to_load.z); + generate_chunk(world, chunk); + world_set_chunk(world, chunk_to_load, chunk); +} + +world_unload_chunk :: #match { + (world: ^World, chunk_to_unload: Vector3i) { + chunk := world_get_chunk(world, chunk_to_unload); + world_unload_chunk(world, chunk); + world_set_chunk(world, chunk_to_unload, null); + }, + + (world: ^World, chunk: ^Chunk) { + if chunk != null { + chunk_free(chunk); + } + } +} + +world_get_chunk :: #match { + @CompilerBug // If I write the following function in quick form: + // + // (world: ^World, v: Vector3i) => world_get_chunk(world, v.x, v.y, v.z), + // + // the ',' at the end appears to mean "compound expression", so the following + // function defintion gets lumped as the second return result. Maybe there + // should be a special case for parsing this? I've always hated how parsing + // inside of a #match block works. + // + + (world: ^World, x, y, z: i32) -> ^Chunk { + d := world.chunk_dist; + sl := d * 2 + 1; + + ix := x - world.center_chunk.x + d; + iy := y - world.center_chunk.y + d; + iz := z - world.center_chunk.z + d; + if ix < 0 || ix > 2 * world.chunk_dist do return null; + if iy < 0 || iy > 2 * world.chunk_dist do return null; + if iz < 0 || iz > 2 * world.chunk_dist do return null; + + return world.chunks[ix * sl * sl + iy * sl + iz]; + }, + + (world: ^World, v: Vector3i) => world_get_chunk(world, v.x, v.y, v.z) +} + +world_set_chunk :: #match { + (world: ^World, v: Vector3i, chunk: ^Chunk) -> #auto { return world_set_chunk(world, v.x, v.y, v.z, chunk); }, + + (world: ^World, x, y, z: i32, chunk: ^Chunk) -> bool { + d := world.chunk_dist; + sl := d * 2 + 1; + + ix := x - world.center_chunk.x + d; + iy := y - world.center_chunk.y + d; + iz := z - world.center_chunk.z + d; + if ix < 0 || ix > 2 * world.chunk_dist do return false; + if iy < 0 || iy > 2 * world.chunk_dist do return false; + if iz < 0 || iz > 2 * world.chunk_dist do return false; + + world.chunks[ix * sl * sl + iy * sl + iz] = chunk; + return true; + } +} + +// Getting around the stupidness that is integer arithmetic on modern processors +#local world_coord_to_chunk_and_block :: (world: ^World, x, y, z: i32) -> (chunk: Vector3i, block: Vector3i) { + chunk, block: Vector3i; + chunk.x = x / Chunk_Size; + chunk.y = y / Chunk_Size; + chunk.z = z / Chunk_Size; + block.x = x % Chunk_Size; + block.y = y % Chunk_Size; + block.z = z % Chunk_Size; + + if x < 0 && block.x != 0 { chunk.x -= 1; block.x += Chunk_Size; } + if y < 0 && block.y != 0 { chunk.y -= 1; block.y += Chunk_Size; } + if z < 0 && block.z != 0 { chunk.z -= 1; block.z += Chunk_Size; } + + return chunk, block; +} + +world_position_to_chunk :: (world: ^World, use pos: Vector3) -> Vector3i { + chunk: Vector3i; + chunk.x = ~~math.floor(x / ~~Chunk_Size); + chunk.y = ~~math.floor(y / ~~Chunk_Size); + chunk.z = ~~math.floor(z / ~~Chunk_Size); + return chunk; +} + +world_get_block :: (world: ^World, x, y, z: i32) -> Block { + chunk_pos, block_pos := world_coord_to_chunk_and_block(world, x, y, z); + chunk := world_get_chunk(world, chunk_pos); + if chunk == null do return Block_Empty; + return chunk_get(chunk, block_pos.x, block_pos.y, block_pos.z); +} + +world_set_block :: (world: ^World, x, y, z: i32, block: Block) { + chunk_pos, block_pos := world_coord_to_chunk_and_block(world, x, y, z); + chunk := world_get_chunk(world, chunk_pos); + if chunk == null do return; + chunk_set(chunk, block_pos.x, block_pos.y, block_pos.z, block); +} + +world_move_center :: (use world: ^World, new_center: Vector3i) { + if center_chunk == new_center do return; + + sl := world.chunk_dist * 2 + 1; + current_chunks := memory.copy_slice(world.chunks); + memory.fill_slice(world.chunks, null); + + center_chunk = new_center; + for current_chunks { + if it == null do continue; + if !world_set_chunk(world, it.coord, it) { + world_unload_chunk(world, it); + } + } + + array.clear(^chunks_to_load); + for x: center_chunk.x-world.chunk_dist .. center_chunk.x+world.chunk_dist+1 + do for y: center_chunk.y-world.chunk_dist .. center_chunk.y+world.chunk_dist+1 + do for z: center_chunk.z-world.chunk_dist .. center_chunk.z+world.chunk_dist+1 { + if world_get_chunk(world, x, y, z) == null do world.chunks_to_load << .{x, y, z}; + } + + memory.free_slice(^current_chunks); +} + +world_get_aabbs :: (use world: ^World, center: Vector3, radius: f32, buffer: [] AABB = .[]) -> [] AABB { + is_dynamic := buffer.count == 0; + aabbs: [..] AABB; + buffer_pos := 0; + + pos := Vector3i.{ ~~math.floor(center.x), ~~math.floor(center.y), ~~math.floor(center.z) }; + rad := cast(i32) math.ceil(radius); + + for x: pos.x-rad .. pos.x+rad+1 { + for y: pos.y-rad .. pos.y+rad+1 { + for z: pos.z-rad .. pos.z+rad+1 { + if world_get_block(world, x, y, z) != Block_Empty { + aabb := AABB.{ + ~~x, ~~y, ~~z, + ~~(x+1), ~~(y+1), ~~(z+1) + }; + + if is_dynamic { + aabbs << aabb; + } else { + buffer[buffer_pos] = aabb; + buffer_pos += 1; + if buffer_pos >= buffer.count do break break break; + } + } + } + } + } + + if is_dynamic do return aabbs; + return buffer[0 .. buffer_pos]; +} + +world_update :: (use world: ^World, dt: f32) { + if chunks_to_load.count > 0 { + chunk_to_load := chunks_to_load[0]; + array.delete(^chunks_to_load, 0); + + world_load_chunk(world, chunk_to_load); + } +} + +world_draw :: (use world: ^World) { + for chunks { + if it == null do continue; + chunk_build_mesh(it); + chunk_draw(it); + } +} diff --git a/src/client/world/worldgen.onyx b/src/client/world/worldgen.onyx new file mode 100644 index 0000000..583887d --- /dev/null +++ b/src/client/world/worldgen.onyx @@ -0,0 +1,30 @@ + +use package core +#local perlin :: package perlin + +#local seed :: 8675309 + +generate_chunk :: (world: ^World, chunk: ^Chunk) { + for cz: 32 do for cx: 32 { + t := chunk_coords_to_world(chunk, cx, 0, cz); + px := cast(f64) t.x / 24; + pz := cast(f64) t.z / 24; + + n := perlin.noise(px, ~~(10 * seed), pz); + l := perlin.noise(px, ~~(10 * seed), pz); + l = (math.clamp(math.max(0, l), 0.2, 0.5) - 0.2) / 0.6 + 0.5; + h := cast(i32) (n * 32 + 18); + h = math.max(h, 14); + if n < -0.9 do h += ~~((n + 0.9) * 4); + + h -= chunk.coord.y * Chunk_Size; + if h >= 0 { chunk_set(chunk, cx, h, cz, block_make(0.2, 1, 0.2, ~~l)); h -= 1; } + for cy: 2 .. h+1 do chunk_set(chunk, cx, cy, cz, block_make(0.3, 0.3, 0.1, 1, .{texture_enabled=false})); + for cy: 0 .. math.min(h, 2)+1 do chunk_set(chunk, cx, cy, cz, block_make(0.2, 0.2, 0.2, 0.5, .{texture_enabled=false})); + } + + chunk_set(chunk, 0, 0, 0, block_make(1, 0, 1, 1)); + + debug_log(.Debug, "Generated chunk at {}.", chunk.position); +} + diff --git a/src/config.onyx.template b/src/config.onyx.template index 2471283..ffac594 100644 --- a/src/config.onyx.template +++ b/src/config.onyx.template @@ -1,3 +1,3 @@ package runtime.vars -ONYX_MODULE_DIR :: // ... +ONYX_MODULE_DIR :: "" diff --git a/src/gfx/canvas.onyx b/src/gfx/canvas.onyx deleted file mode 100644 index f8ffef2..0000000 --- a/src/gfx/canvas.onyx +++ /dev/null @@ -1,61 +0,0 @@ - -use package core -use package opengles - - -Canvas :: struct { - width, height: i32; - - framebuffer: GLint; - depth_stencil_buffer: GLint; - color_texture: GLint; -} - -canvas_make :: (width, height: i32) -> Canvas { - canvas: Canvas; - canvas.width = width; - canvas.height = height; - - glGenFramebuffers(1, ^canvas.framebuffer); - glBindFramebuffer(GL_FRAMEBUFFER, canvas.framebuffer); - - glGenTextures(1, ^canvas.color_texture); - glBindTexture(GL_TEXTURE_2D, canvas.color_texture); - glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, null); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - glBindTexture(GL_TEXTURE_2D, 0); - glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, canvas.color_texture, 0); - - glGenRenderbuffers(1, ^canvas.depth_stencil_buffer); - glBindRenderbuffer(GL_RENDERBUFFER, canvas.depth_stencil_buffer); - glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, width, height); - glBindRenderbuffer(GL_RENDERBUFFER, 0); - glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, canvas.depth_stencil_buffer); - - if glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE { - debug_log(.Error, "Framebuffer is not complete!"); - } - - glBindFramebuffer(GL_FRAMEBUFFER, 0); - return canvas; -} - -canvas_free :: (use canvas: ^Canvas) { - glDeleteFramebuffers(1, ^canvas.framebuffer); - glDeleteTextures(1, ^canvas.color_texture); - glDeleteRenderbuffers(1, ^canvas.depth_stencil_buffer); -} - -canvas_use :: (use canvas: ^Canvas) { - if canvas == null { - glBindFramebuffer(GL_FRAMEBUFFER, 0); - update_view_matrix(); - } else { - glBindFramebuffer(GL_FRAMEBUFFER, framebuffer); - // update_view_matrix(width, height); - } -} - -canvas_to_texture :: (canvas: ^Canvas) => Texture.{ canvas.color_texture, canvas.width, canvas.height, 3, "" }; - diff --git a/src/gfx/font.onyx b/src/gfx/font.onyx deleted file mode 100644 index 35994bb..0000000 --- a/src/gfx/font.onyx +++ /dev/null @@ -1,258 +0,0 @@ - -use package core -use package core.intrinsics.onyx {__zero_value} -use package stb_truetype -use package opengles - -#local { - font_registry: Map(FontDescriptor, Font); - font_vbo: GLint; - font_vao: GLint; - - font_shader: Shader; - font_color: Color; -} - -fonts_init :: () { - map.init(^font_registry); - - font_shader = shader_make("./assets/shaders/font.glsl"); - shader_use(font_shader); - shader_link_window_matrix_block(font_shader); - shader_link_world_matrix_block(font_shader); - - glGenVertexArrays(1, ^font_vao); - glBindVertexArray(font_vao); - - font_interp_buffer: GLint; - glGenBuffers(1, ^font_interp_buffer); - glBindBuffer(GL_ARRAY_BUFFER, font_interp_buffer); - font_interp_data := f32.[ - 0.0, 0.0, - 1.0, 0.0, - 1.0, 1.0, - 0.0, 1.0, - ]; - glBufferData(GL_ARRAY_BUFFER, sizeof typeof font_interp_data, ~~^font_interp_data, GL_STATIC_DRAW); - glEnableVertexAttribArray(0); - glVertexAttribPointer(0, 2, GL_FLOAT, false, 2 * sizeof f32, ~~0); - - font_index_buffer: GLint; - glGenBuffers(1, ^font_index_buffer); - glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, font_index_buffer); - font_index_data := u8.[ 0, 1, 2, 0, 2, 3 ]; - glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof typeof font_index_data, ~~^font_index_data, GL_STATIC_DRAW); - - glGenBuffers(1, ^font_vbo); - glBindBuffer(GL_ARRAY_BUFFER, font_vbo); - glBufferData(GL_ARRAY_BUFFER, 1024 * sizeof stbtt_aligned_quad, null, GL_STREAM_DRAW); - - for 1..5 { - glEnableVertexAttribArray(it); - glVertexAttribDivisor(it, 1); - } - glVertexAttribPointer(1, 2, GL_FLOAT, false, sizeof stbtt_aligned_quad, ~~ 0); - glVertexAttribPointer(2, 2, GL_FLOAT, false, sizeof stbtt_aligned_quad, ~~16); - glVertexAttribPointer(3, 2, GL_FLOAT, false, sizeof stbtt_aligned_quad, ~~8); - glVertexAttribPointer(4, 2, GL_FLOAT, false, sizeof stbtt_aligned_quad, ~~24); - - glBindBuffer(GL_ARRAY_BUFFER, -1); - glBindVertexArray(-1); - - font_set_color(.{0,0,0}); -} - - -Font :: struct { - texture: GLint; - texture_width, texture_height: i32; - chars: [] stbtt_packedchar; - em: f32; -} - -font_make :: (fd: FontDescriptor) -> Font { - texture_size :: 256; - - char_data := memory.make_slice(stbtt_packedchar, 96); - - ttf_file := os.get_contents(fd.path); - if ttf_file.count == 0 { - println("Bad font"); - return __zero_value(Font); - } - defer cfree(ttf_file.data); - - pixels := calloc(texture_size * texture_size); - defer cfree(pixels); - - ctx: stbtt_pack_context; - stbtt_PackBegin(^ctx, pixels, texture_size, texture_size, 0, 1); - stbtt_PackFontRange(^ctx, ttf_file.data, 0, ~~fd.size, #char " ", 96, char_data.data); - stbtt_PackEnd(^ctx); - - texture: GLint; - glGenTextures(1, ^texture); - glBindTexture(GL_TEXTURE_2D, texture); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0); - glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, texture_size, texture_size, 0, GL_ALPHA, GL_UNSIGNED_BYTE, pixels); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - glBindTexture(GL_TEXTURE_2D, 0); - - font := Font.{ - texture = texture, - texture_width = texture_size, - texture_height = texture_size, - chars = char_data, - em = ~~fd.size, - }; - - font_registry[fd] = font; - - return font; -} - -font_set_color :: (color: Color) { - font_color = color; -} - -font_print :: (font: Font, x, y: f32, format: str, va: ..any) { - buf: [1024] u8; - msg := conv.format_va(buf, format, va); - font_draw(font, x, y, msg); -} - -font_draw :: (font: Font, x, y: f32, msg: str) { - quads: ^stbtt_aligned_quad = alloc.from_stack(msg.count * sizeof stbtt_aligned_quad); - quad_num := 0; - - x_, y_ := x, y; - - for msg { - if it == #char "\n" { - x_ = x; - y_ += font.em + 2; - } - - stbtt_GetPackedQuad(font.chars.data, font.texture_width, font.texture_height, - ~~(it - #char " "), ^x_, ^y_, ^quads[quad_num], false); - - quad_num += 1; - } - - font_render(font, quads[0 .. quad_num]); -} - -font_draw_centered :: (font: Font, x, y, max_width: f32, msg: str) { - quads: ^stbtt_aligned_quad = alloc.from_stack(msg.count * sizeof stbtt_aligned_quad); - quad_num := 0; - - width := font_get_width(font, msg); - x_, y_ := x, y; - x_ = (max_width - width) / 2 + x; - - for msg { - if it == #char "\n" { - x_ = (max_width - width) / 2 + x; - y_ += font.em + 2; - } - - stbtt_GetPackedQuad(font.chars.data, font.texture_width, font.texture_height, - ~~(it - #char " "), ^x_, ^y_, ^quads[quad_num], false); - - quad_num += 1; - } - - font_render(font, quads[0 .. quad_num]); -} - -#local font_render :: (font: Font, quads: [] stbtt_aligned_quad) { - // If this is being used in conjunction with the immediate - // rendering system, make sure the immediate objects are flushed - // before trying to render over them. - #if #defined(immediate_flush) { - immediate_flush(); - } - - glBindBuffer(GL_ARRAY_BUFFER, font_vbo); - glBufferSubData(GL_ARRAY_BUFFER, 0, quads.count * sizeof stbtt_aligned_quad, quads.data); - glBindBuffer(GL_ARRAY_BUFFER, -1); - - glActiveTexture(GL_TEXTURE0); - glBindTexture(GL_TEXTURE_2D, font.texture); - shader_use(font_shader); - shader_set_uniform(font_shader, #cstr "u_texture", 0); - shader_set_uniform(font_shader, #cstr "u_color", font_color); - - glDisable(GL_DEPTH_TEST); - glBindVertexArray(font_vao); - glDrawElementsInstanced(GL_TRIANGLES, 6, GL_UNSIGNED_BYTE, ~~0, quads.count); - glBindTexture(GL_TEXTURE_2D, -1); - glBindVertexArray(-1); -} - -font_get_width :: (font: Font, msg: str) -> f32 { - x_, y_ := 0.0f, 0.0f; - width := 0.0f; - - quad: stbtt_aligned_quad; - for msg { - if it == #char "\n" { - width = math.max(width, x_); - x_ = 0; - y_ += font.em + 2; - continue; - } - - stbtt_GetPackedQuad(font.chars.data, font.texture_width, font.texture_height, - ~~(it - #char " "), ^x_, ^y_, ^quad, false); - } - - return math.max(x_, width); -} - -font_get_height :: (font: Font, msg: str) -> f32 { - x_, y_ := 0.0f, 0.0f; - width := 0.0f; - - quad: stbtt_aligned_quad; - for msg { - if it == #char "\n" { - width = math.max(width, x_); - x_ = 0; - y_ += font.em + 2; - continue; - } - - stbtt_GetPackedQuad(font.chars.data, font.texture_width, font.texture_height, - ~~(it - #char " "), ^x_, ^y_, ^quad, false); - } - - return y_ + font.em + 2; -} - - -FontDescriptor :: struct { - path : str; - size : u32; -} - -#match hash.to_u32 (fd: FontDescriptor) => { - name_hash := hash.to_u32(fd.path); - size_hash := hash.to_u32(fd.size); - return name_hash * 13 + size_hash * 17; -} - -#operator == (f1, f2: FontDescriptor) => f1.path == f2.path && f1.size == f2.size; - -font_lookup :: (fd := FontDescriptor.{ "assets/calibri.ttf", 12 }) -> Font { - if font_registry->has(fd) { - return font_registry[fd]; - } - - font := font_make(fd); - font_registry[fd] = font; - return font; -} - diff --git a/src/gfx/immediate.onyx b/src/gfx/immediate.onyx deleted file mode 100644 index 8bdd5ba..0000000 --- a/src/gfx/immediate.onyx +++ /dev/null @@ -1,199 +0,0 @@ - -use package core -use package opengles -use package glfw3 - -immediate_init :: () { - memory.alloc_slice(^vertex_data, Maximum_Vertex_Count); - vertex_count = 0; - - imgui_shader = shader_make(Shader_Path); - shader_use(imgui_shader); - shader_link_window_matrix_block(imgui_shader); - shader_link_world_matrix_block(imgui_shader); - shader_set_uniform(imgui_shader, #cstr "u_texture_enabled", 0.0f); - shader_set_uniform(imgui_shader, #cstr "u_texture", 0); - - immediate_mesh = mesh_make(vertex_data, .[], GL_DYNAMIC_DRAW); - immediate_color = .{0,0,0}; -} - -immediate_flush :: () { - if vertex_count == 0 do return; - - shader_use(imgui_shader); - shader_set_uniform(imgui_shader, #cstr "u_texture_enabled", 1.0f if rendering_type == .Image else 0.0f); - - immediate_mesh.vertex_count = vertex_count; - mesh_update_verticies(immediate_mesh, vertex_data); - - mesh_draw(immediate_mesh); - - vertex_count = 0; - rendering_type = .Plain; - immediate_mesh.primitive = GL_TRIANGLES; -} - -immediate_clear :: (color: Color) { - glClearColor(color.r, color.g, color.b, color.a); - glClear(GL_COLOR_BUFFER_BIT); -} - -immediate_set_color :: (color: Color) { - immediate_color = color; -} - -immediate_vertex :: (x, y: f32, t_x := 0.0f, t_y := 0.0f) { - if vertex_count >= Maximum_Vertex_Count do immediate_flush(); - set_rendering_type(.Plain); - - vertex_data[vertex_count] = .{ .{x, y}, .{t_x, t_y}, immediate_color }; -} - -immediate_line :: (x1, y1, x2, y2: f32) { - if vertex_count >= Maximum_Vertex_Count do immediate_flush(); - set_rendering_type(.Line); - immediate_mesh.primitive = GL_LINES; - - vertex_data[vertex_count + 0] = .{ .{x1, y1}, .{0, 0}, immediate_color }; - vertex_data[vertex_count + 1] = .{ .{x2, y2}, .{0, 0}, immediate_color }; - vertex_count += 2; -} - -immediate_triangle :: (x1, x2, x3: Vector2) { - if vertex_count + 3 > Maximum_Vertex_Count do immediate_flush(); - set_rendering_type(.Plain); - - vertex_data[vertex_count + 0] = .{ x1, .{0,0}, immediate_color }; - vertex_data[vertex_count + 1] = .{ x2, .{0,0}, immediate_color }; - vertex_data[vertex_count + 2] = .{ x3, .{0,0}, immediate_color }; - vertex_count += 3; -} - -immediate_rectangle :: (x, y, w, h: f32) { - if vertex_count + 6 > Maximum_Vertex_Count do immediate_flush(); - set_rendering_type(.Plain); - - vertex_data[vertex_count + 0] = .{ .{x, y}, .{0,0}, immediate_color }; - vertex_data[vertex_count + 1] = .{ .{x+w, y}, .{0,0}, immediate_color }; - vertex_data[vertex_count + 2] = .{ .{x+w, y+h}, .{0,0}, immediate_color }; - vertex_data[vertex_count + 3] = .{ .{x, y}, .{0,0}, immediate_color }; - vertex_data[vertex_count + 4] = .{ .{x+w, y+h}, .{0,0}, immediate_color }; - vertex_data[vertex_count + 5] = .{ .{x, y+h}, .{0,0}, immediate_color }; - vertex_count += 6; -} - -immediate_image :: (image: ^Texture, x, y, w, h: f32) { - if vertex_count > 0 do immediate_flush(); - - set_rendering_type(.Image); - texture_use(image); - shader_use(imgui_shader); - shader_set_uniform(imgui_shader, #cstr "u_texture", 0); - - vertex_data[vertex_count + 0] = .{ .{x, y}, .{0,0}, immediate_color }; - vertex_data[vertex_count + 1] = .{ .{x+w, y}, .{1,0}, immediate_color }; - vertex_data[vertex_count + 2] = .{ .{x+w, y+h}, .{1,1}, immediate_color }; - vertex_data[vertex_count + 3] = .{ .{x, y}, .{0,0}, immediate_color }; - vertex_data[vertex_count + 4] = .{ .{x+w, y+h}, .{1,1}, immediate_color }; - vertex_data[vertex_count + 5] = .{ .{x, y+h}, .{0,1}, immediate_color }; - vertex_count += 6; -} - -immediate_subimage :: (image: ^Texture, x, y, w, h: f32, tx, ty, tw, th: f32) { - if vertex_count > 0 do immediate_flush(); - - set_rendering_type(.Image); - texture_use(image); - shader_use(imgui_shader); - shader_set_uniform(imgui_shader, #cstr "u_texture", 0); - - sx := tx / ~~ image.width; - sy := ty / ~~ image.height; - sw := tw / ~~ image.width; - sh := th / ~~ image.height; - - vertex_data[vertex_count + 0] = .{ .{x, y}, .{sx, sy}, immediate_color }; - vertex_data[vertex_count + 1] = .{ .{x+w, y}, .{sx+sw, sy}, immediate_color }; - vertex_data[vertex_count + 2] = .{ .{x+w, y+h}, .{sx+sw,sy+sh}, immediate_color }; - vertex_data[vertex_count + 3] = .{ .{x, y}, .{sx, sy}, immediate_color }; - vertex_data[vertex_count + 4] = .{ .{x+w, y+h}, .{sx+sw,sy+sh}, immediate_color }; - vertex_data[vertex_count + 5] = .{ .{x, y+h}, .{sx, sy+sh}, immediate_color }; - vertex_count += 6; -} - -immediate_ellipse :: () {} - -immediate_push_scissor :: (x, y, w, h: f32) { - // Assuming that x, y, w, and h are in screen (window) coordinates. - - scissors << .{x, y, w, h}; - glEnable(GL_SCISSOR_TEST); - glScissor(~~x, cast(i32) camera.window_height - ~~(y + h), ~~w, ~~h); -} - -immediate_pop_scissor :: () { - if scissors.count > 0 { - array.pop(^scissors); - } - - if scissors.count > 0 { - glEnable(GL_SCISSOR_TEST); - s := scissors[scissors.count - 1]; - glScissor(~~s.x, cast(i32) camera.window_height - ~~(s.y + s.h), ~~s.w, ~~s.h); - } else { - glDisable(GL_SCISSOR_TEST); - } -} - -immediate_set_scroll :: (scroll_x, scroll_y: f32) { - offset = .{ scroll_x, scroll_y }; - update_model_matrix(.{ offset.x, offset.y, 0 }); -} - -immediate_get_scroll :: () => offset; - -Color :: struct { - r, g, b : f32; - a := 1.0f; -} - -Immediate_Vertex :: struct { - pos: Vector2; - tex: Vector2; - color: Color; -} - -#local { - Shader_Path :: "./assets/shaders/imgui.glsl" - imgui_shader: Shader; - - Maximum_Vertex_Count :: 1023; - vertex_count: i32; - vertex_data: [] Immediate_Vertex; - - immediate_color: Color; - - immediate_mesh: ^Mesh(Immediate_Vertex); - - Rendering_Type :: enum { - Plain; - Line; - Image; - } - rendering_type := Rendering_Type.Plain; - - Scissor :: struct { - x, y, w, h: f32; - } - scissors: [..] Scissor; - - offset: Vector2; - - set_rendering_type :: (new_type: typeof rendering_type) { - if rendering_type != new_type { - immediate_flush(); - rendering_type = new_type; - } - } -} diff --git a/src/gfx/mesh.onyx b/src/gfx/mesh.onyx deleted file mode 100644 index db769a9..0000000 --- a/src/gfx/mesh.onyx +++ /dev/null @@ -1,87 +0,0 @@ -use package core -use package opengles - -Mesh :: struct (Vertex_Type: type_expr) { - handle: GLint; - vertex_handle: GLint; - index_handle: GLint; - - vertex_count: u32; - index_count: u32; - primitive: GLuint = GL_TRIANGLES; -} - -mesh_make :: (verticies: [] $T, indicies: [] u32, gl_hint := GL_STATIC_DRAW) -> ^Mesh(T) { - mesh := new(Mesh(T)); - mesh.vertex_count = verticies.count; - mesh.index_count = indicies.count; - - glGenVertexArrays(1, ^mesh.handle); - glBindVertexArray(mesh.handle); - - glGenBuffers(1, ^mesh.vertex_handle); - glBindBuffer(GL_ARRAY_BUFFER, mesh.vertex_handle); - glBufferData(GL_ARRAY_BUFFER, sizeof T * verticies.count, verticies.data, gl_hint); - - vertex_info := cast(^type_info.Type_Info_Struct) type_info.get_type_info(T); - vertex_attr := 0; - for attr: vertex_info.members { - defer vertex_attr += 1; - glEnableVertexAttribArray(vertex_attr); - - switch attr.type { - case Vector2 do glVertexAttribPointer(vertex_attr, 2, GL_FLOAT, false, sizeof T, ~~attr.offset); - case Vector3 do glVertexAttribPointer(vertex_attr, 3, GL_FLOAT, false, sizeof T, ~~attr.offset); - case u32 do glVertexAttribIPointer(vertex_attr, 1, GL_UNSIGNED_INT, sizeof T, ~~attr.offset); - case i32 do glVertexAttribIPointer(vertex_attr, 1, GL_INT, sizeof T, ~~attr.offset); - - // It would be nice to not have to have all the cases here. - // Instead allow for an extensible way of defining them at compile time. - case Color do glVertexAttribPointer(vertex_attr, 4, GL_FLOAT, false, sizeof T, ~~attr.offset); - - case #default { - buf: [256] u8; - msg := conv.str_format(buf, "Unknown type for GL vertex attribute, {}.", attr.type); - assert(false, msg); - } - } - } - - if indicies.count > 0 { - glGenBuffers(1, ^mesh.index_handle); - glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mesh.index_handle); - glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof i32 * indicies.count, indicies.data, gl_hint); - } - - glBindVertexArray(-1); - - return mesh; -} - -mesh_update_verticies :: (use mesh: ^Mesh, verticies: [] mesh.Vertex_Type) { - @TODO // Add bounds checking to arrays here. - - glBindBuffer(GL_ARRAY_BUFFER, vertex_handle); - glBufferSubData(GL_ARRAY_BUFFER, 0, verticies.count * sizeof mesh.Vertex_Type, verticies.data); - glBindBuffer(GL_ARRAY_BUFFER, -1); -} - -mesh_draw :: (use mesh: ^Mesh) { - glBindVertexArray(handle); - if index_count > 0 { - glDrawElements(primitive, index_count, GL_UNSIGNED_INT, ~~0); - } else { - glDrawArrays(primitive, 0, vertex_count); - } - glBindVertexArray(-1); -} - -mesh_free :: (mesh: ^Mesh) { - glDeleteBuffers(1, ^mesh.vertex_handle); - glDeleteBuffers(1, ^mesh.index_handle); - glDeleteVertexArrays(1, ^mesh.handle); - cfree(mesh); -} - - - diff --git a/src/gfx/shader.onyx b/src/gfx/shader.onyx deleted file mode 100644 index 8e553c5..0000000 --- a/src/gfx/shader.onyx +++ /dev/null @@ -1,171 +0,0 @@ - -use package core -use package opengles - -Shader :: struct { - vs, fs: GLuint; - prog: GLuint; -} - -window_matrix_block_buffer: GLuint; -world_matrix_block_buffer: GLuint; - -shaders_init :: () { - glGenBuffers(1, ^window_matrix_block_buffer); - glGenBuffers(1, ^world_matrix_block_buffer); - - glBindBuffer(GL_UNIFORM_BUFFER, window_matrix_block_buffer); - glBufferData(GL_UNIFORM_BUFFER, sizeof f32 * 16, null, GL_DYNAMIC_DRAW); - - glBindBuffer(GL_UNIFORM_BUFFER, world_matrix_block_buffer); - glBufferData(GL_UNIFORM_BUFFER, sizeof f32 * (16 + 16 + 16), null, GL_DYNAMIC_DRAW); - - glBindBuffer(GL_UNIFORM_BUFFER, -1); - - glBindBufferBase(GL_UNIFORM_BUFFER, WINDOW_MATRIX_BLOCK, window_matrix_block_buffer); - glBindBufferBase(GL_UNIFORM_BUFFER, WORLD_MATRIX_BLOCK, world_matrix_block_buffer); -} - -shader_make :: (path: str) -> Shader { - shader := os.get_contents(path); - vs := compile_shader(shader, GL_VERTEX_SHADER); - fs := compile_shader(shader, GL_FRAGMENT_SHADER); - - prog := link_program(vs, fs); - - return Shader.{vs, fs, prog}; -} - -shader_use :: (shader: Shader) { - glUseProgram(shader.prog); -} - -#local { - WINDOW_MATRIX_BLOCK :: 0; - WORLD_MATRIX_BLOCK :: 1; -} - -shader_link_window_matrix_block :: (use shader: Shader) { - matrix_block_index := glGetUniformBlockIndex(prog, #cstr "u_window_matrix_block"); - glUniformBlockBinding(prog, matrix_block_index, WINDOW_MATRIX_BLOCK); -} - -shader_link_world_matrix_block :: (use shader: Shader) { - matrix_block_index := glGetUniformBlockIndex(prog, #cstr "u_world_matrix_block"); - glUniformBlockBinding(prog, matrix_block_index, WORLD_MATRIX_BLOCK); -} - -shader_set_uniform :: (shader: Shader, uniform: cstr, value: $T) { - glUseProgram(shader.prog); - location := glGetUniformLocation(shader.prog, uniform); - - set_uniform_internal(location, value); - - set_uniform_internal :: #match { - macro (location: GLint, value: u32) do glUniform1i(location, value); , - macro (location: GLint, value: f32) do glUniform1f(location, value); , - macro (location: GLint, value: Vector3) do glUniform3f(location, value.x, value.y, value.z); , - macro (location: GLint, value: Color) do glUniform4f(location, value.r, value.g, value.b, value.a); , - - macro (location: GLint, value: $T) { - buffer: [1024] u8; - assert(false, conv.format(buffer, "Bad shader_set_uniform case: {}", T)); - } - } -} - -update_view_matrix :: () { - view_mat: [16] f32; - camera_get_view_matrix(^camera, view_mat); - - glBindBuffer(GL_UNIFORM_BUFFER, world_matrix_block_buffer); - glBufferSubData(GL_UNIFORM_BUFFER, 0, sizeof typeof view_mat, ^view_mat); - glBindBuffer(GL_UNIFORM_BUFFER, -1); -} - -update_world_matrix :: () { - world_mat: [16] f32; - camera_get_world_matrix(^camera, world_mat); - - glBindBuffer(GL_UNIFORM_BUFFER, world_matrix_block_buffer); - glBufferSubData(GL_UNIFORM_BUFFER, 16 * sizeof f32, sizeof typeof world_mat, ^world_mat); - glBindBuffer(GL_UNIFORM_BUFFER, -1); -} - -update_window_matrix :: () { - window_mat: [16] f32; - camera_get_window_matrix(^camera, window_mat); - - glBindBuffer(GL_UNIFORM_BUFFER, window_matrix_block_buffer); - glBufferSubData(GL_UNIFORM_BUFFER, 0, sizeof typeof window_mat, ^window_mat); - glBindBuffer(GL_UNIFORM_BUFFER, -1); -} - -update_model_matrix :: (v: Vector3) { - model_mat: [16] f32; - model_mat[0] = 1; - model_mat[5] = 1; - model_mat[10] = 1; - model_mat[12] = v.x; - model_mat[13] = v.y; - model_mat[14] = v.z; - model_mat[15] = 1; - - glBindBuffer(GL_UNIFORM_BUFFER, world_matrix_block_buffer); - glBufferSubData(GL_UNIFORM_BUFFER, 32 * sizeof f32, sizeof typeof model_mat, ^model_mat); - glBindBuffer(GL_UNIFORM_BUFFER, -1); -} - - -#local { - compile_shader :: (source: str, type: GLenum) -> GLint { - shader := glCreateShader(type); - - #persist VERTEX_HEADER := """ -#version 300 es -#define VERTEX_SHADER 1 -#define COMM out - """; - - #persist FRAGMENT_HEADER := """ -#version 300 es -#define FRAGMENT_SHADER 1 -#define COMM in - """; - - header := VERTEX_HEADER if type == GL_VERTEX_SHADER else FRAGMENT_HEADER; - sources : [] ^u8 = .[ header.data, source.data ]; - source_lens : [] i32 = .[ header.count, source.count ]; - - glShaderSource(shader, 2, sources.data, source_lens.data); - glCompileShader(shader); - - success: GLint; - if glGetShaderiv(shader, GL_COMPILE_STATUS, ^success); success == GL_FALSE { - buf_data: [2048] u8; - buf := str.{ ~~buf_data, 0 }; - glGetShaderInfoLog(shader, 2048, ^buf.count, buf.data); - println(buf); - } - - return shader; - } - - link_program :: (vertex_shader, fragment_shader: GLint) -> GLuint { - prog := glCreateProgram(); - glAttachShader(prog, vertex_shader); - glAttachShader(prog, fragment_shader); - glLinkProgram(prog); - - success: GLint; - if glGetProgramiv(prog, GL_LINK_STATUS, ^success); success == GL_FALSE { - buf_data: [1024] u8; - buf := str.{ ~~buf_data, 0 }; - glGetProgramInfoLog(prog, 1024, ^buf.count, buf.data); - println(buf); - } - - return prog; - } -} - diff --git a/src/gfx/texture.onyx b/src/gfx/texture.onyx deleted file mode 100644 index 0df03b8..0000000 --- a/src/gfx/texture.onyx +++ /dev/null @@ -1,80 +0,0 @@ - -use package core -use package core.intrinsics.onyx { __zero_value as Zero } -use package opengles -use package stb_image - -#local texture_cache: Map(str, Texture); - -Texture :: struct { - texture: GLint; - width, height, channels: i32; - filename: str; -} - -texture_lookup :: #match {} -#match texture_lookup (filename: str) -> (Texture, bool) { - if texture_cache->has(filename) { - return texture_cache[filename], true; - } - - buffer: [512] u8; - memory.copy(~~ buffer, filename.data, math.min(filename.count, 511)); - return texture_lookup(cast(cstr) buffer); -} - -#match texture_lookup (path: cstr) -> (Texture, bool) { - filename := string.from_cstr(path); - if texture_cache->has(filename) { - return texture_cache[filename], true; - } - - tex: Texture; - tex.filename = filename; - pixels := stbi_load(path, ^tex.width, ^tex.height, ^tex.channels, 4); - if pixels == null { - debug_log(.Warning, "Failed to load texture: {}", filename); - return Zero(Texture), false; - } - defer stbi_image_free(pixels); - - glGenTextures(1, ^tex.texture); - glBindTexture(GL_TEXTURE_2D, tex.texture); - glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex.width, tex.height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels); - - // Are these sensible defaults? - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); - - glBindTexture(GL_TEXTURE_2D, 0); - - // This assumes that the filename data is going to be persistant forever. - // Not a great assumption to make but is it really worth copying it? - texture_cache[filename] = tex; - debug_log(.Info, "Loaded texture: {}", filename); - return tex, true; -} - -texture_free :: (use tex: ^Texture) { - glDeleteTextures(1, ^texture); -} - -texture_use :: (use tex: ^Texture, texture_binding := 0) { - glActiveTexture(GL_TEXTURE0 + texture_binding); - glBindTexture(GL_TEXTURE_2D, texture); -} - - -Texture_Wrap :: enum { - Clamp :: GL_CLAMP_TO_EDGE | 0; - Repeat :: GL_REPEAT | 0; - Mirrored_Repeat :: GL_MIRRORED_REPEAT | 0; -} - -texture_wrap :: (use tex: ^Texture, wrap: Texture_Wrap) { - glBindTexture(GL_TEXTURE_2D, texture); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, ~~ wrap); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, ~~ wrap); -} \ No newline at end of file diff --git a/src/gfx/ui.onyx b/src/gfx/ui.onyx deleted file mode 100644 index f0a50b0..0000000 --- a/src/gfx/ui.onyx +++ /dev/null @@ -1,507 +0,0 @@ -// -// Very simple immediate mode UI -// - -use package core -use package opengles -use package glfw3 - -UI_Id :: u32 - -ui_end_frame :: () { - hot_item_depth_needed = hot_item_depth; - if !hot_item_was_set do set_hot_item(0); - hot_item_depth = 0; - hot_item_was_set = false; - - for^ animation_states.entries { - if !it.value.accessed_this_frame || (it.value.click_time == 0 && it.value.hover_time == 0) { - map.delete(^animation_states, it.key); - } - } - - for^ animation_states.entries { - it.value.accessed_this_frame = false; - } -} - -// -// Buttons -// -Button_Theme :: struct { - use text_theme := Text_Theme.{}; - use animation_theme := Animation_Theme.{}; - - background_color := Color.{ 0.1, 0.1, 0.1 }; - hover_color := Color.{ 0.3, 0.3, 0.3 }; - click_color := Color.{ 0.5, 0.5, 0.7 }; - - border_color := Color.{0.2, 0.2, 0.2}; - border_width := 2.0f; - - active := false; -} - -#local default_button_theme := Button_Theme.{}; - -draw_button :: (use r: Rect, text: str, theme := ^default_button_theme, site := #callsite, increment := 0) -> bool { - result := false; - - hash := get_site_hash(site, increment); - animation_state := get_animation(hash); - mx, my := mouse_get_position(); - - contains := Rect.contains(r, .{~~mx, ~~my}); - - if is_active_item(hash) { - if is_button_just_up(GLFW_MOUSE_BUTTON_LEFT) { - if is_hot_item(hash) && contains { - result = true; - animation_state.click_time = 1.0f; - } - - set_active_item(0); - } - } elseif is_hot_item(hash) { - if is_button_down(GLFW_MOUSE_BUTTON_LEFT) { - set_active_item(hash); - } - } - - if contains { - set_hot_item(hash); - } - - if is_hot_item(hash) || theme.active { - move_towards(^animation_state.hover_time, 1.0f, theme.hover_speed); - } else { - move_towards(^animation_state.hover_time, 0.0f, theme.hover_speed); - } - - border_width := theme.border_width; - - immediate_set_color(theme.border_color); - immediate_rectangle(x, y, w, h); - - surface_color := color_lerp(animation_state.hover_time, theme.background_color, theme.hover_color); - surface_color = color_lerp(animation_state.click_time, surface_color, theme.click_color); - immediate_set_color(surface_color); - immediate_rectangle(x + border_width, y + border_width, w - border_width * 2, h - border_width * 2); - - font := font_lookup(.{theme.font_name, theme.font_size}); - font_height := font_get_height(font, text); - font_set_color(theme.text_color); - font_draw_centered(font, x, y + (h - font_height) / 2 + font.em - 2, w, text); - - move_towards(^animation_state.click_time, 0.0f, theme.click_decay_speed); - - return result; -} - - -// -// Textbox -// -Textbox_Theme :: struct { - use text_theme := Text_Theme.{ - text_color = .{ 0, 0, 0 } - }; - - use animation_theme := Animation_Theme.{}; - - background_color := Color.{ 0.8, 0.8, 0.8 }; - hover_color := Color.{ 1.0, 1.0, 1.0 }; - click_color := Color.{ 0.5, 0.5, 0.7 }; - - border_color := Color.{ 0.2, 0.2, 0.2 }; - border_width := 6.0f; @InPixels - - cursor_color := Color.{ 0.5, 0.5, 0.5 }; - cursor_width := 4.0f; @InPixels - cursor_blink_speed := 0.04f; // Bigger is faster - - placeholder_text_color := Color.{ 0.5, 0.5, 0.5 }; -} - -#local { - default_textbox_theme := Textbox_Theme.{}; - - Textbox_Editing_State :: struct { - hash: UI_Id = 0; - - cursor_position: i32 = 0; - cursor_animation := 0.0f; - cursor_animation_speed := 0.02f; - } - - textbox_editing_state := Textbox_Editing_State.{}; -} - -draw_textbox :: (use r: Rect, text_buffer: ^[..] u8, placeholder := null_str, theme := ^default_textbox_theme, site := #callsite, increment := 0) -> bool { - result := false; - - hash := get_site_hash(site, increment); - animation_state := get_animation(hash); - mx, my := mouse_get_position(); - - border_width := theme.border_width; - text_color := theme.text_color; - text := str.{text_buffer.data, text_buffer.count}; - if text.count == 0 && placeholder.count > 0 { - text = placeholder; - text_color = theme.placeholder_text_color; - } - - font := font_lookup(.{theme.font_name, theme.font_size}); - text_width := font_get_width(font, text); - text_height := font_get_height(font, text); - - text_x := x + border_width; - text_y := y + font.em + (h - text_height) / 2; - - contains := Rect.contains(r, .{~~mx, ~~my}); - - if is_hot_item(hash) && !is_active_item(hash) { - if is_button_down(GLFW_MOUSE_BUTTON_LEFT) && contains { - set_active_item(hash); - textbox_editing_state.hash = hash; - textbox_editing_state.cursor_animation_speed = theme.cursor_blink_speed; - } - } - - if is_active_item(hash) { - if is_button_just_down(GLFW_MOUSE_BUTTON_LEFT) && !contains { - set_active_item(0); - textbox_editing_state.hash = 0; - textbox_editing_state.cursor_position = 0; - } - } - - if contains { - set_hot_item(hash); - } - - if textbox_editing_state.hash == hash { - move_towards(^textbox_editing_state.cursor_animation, 0.0f, textbox_editing_state.cursor_animation_speed); - if textbox_editing_state.cursor_animation <= 0.0f do textbox_editing_state.cursor_animation = 1.0f; - - if is_button_down(GLFW_MOUSE_BUTTON_LEFT) && contains { - textbox_editing_state.cursor_animation = 1.0f; - // textbox_editing_state.cursor_position = get_cursor_position(text_buffer, text_x, text_y, theme.font_size, ~~mx, ~~my); - } - - keys := input_get_keys_this_frame(); - if keys.count > 0 { - for key: keys { - switch key { - case GLFW_KEY_LEFT do textbox_editing_state.cursor_position -= 1; - case GLFW_KEY_RIGHT do textbox_editing_state.cursor_position += 1; - case GLFW_KEY_END do textbox_editing_state.cursor_position = text_buffer.count; - case GLFW_KEY_HOME do textbox_editing_state.cursor_position = 0; - - case GLFW_KEY_BACKSPACE { - array.pop(text_buffer); - textbox_editing_state.cursor_position = math.max(~~0, textbox_editing_state.cursor_position - 1); - } - - case GLFW_KEY_DELETE { - array.delete(text_buffer, textbox_editing_state.cursor_position); - } - - case #default { - if key >= #char " " && key <= 128 { - array.push(text_buffer, ~~key); - textbox_editing_state.cursor_position += 1; - } - } - } - } - - textbox_editing_state.cursor_position = math.clamp(textbox_editing_state.cursor_position, 0, text_buffer.count); - textbox_editing_state.cursor_animation = 1.0f; - - text = str.{text_buffer.data, text_buffer.count}; - } - } - - if is_hot_item(hash) { - move_towards(^animation_state.hover_time, 1.0f, theme.hover_speed); - } else { - move_towards(^animation_state.hover_time, 0.0f, theme.hover_speed); - } - - immediate_push_scissor(x, y, w, h); - immediate_set_color(theme.border_color); - immediate_rectangle(x, y, w, h); - - surface_color := color_lerp(animation_state.hover_time, theme.background_color, theme.hover_color); - surface_color = color_lerp(animation_state.click_time, surface_color, theme.click_color); - immediate_set_color(surface_color); - immediate_rectangle(x + border_width, y + border_width, w - border_width * 2, h - border_width * 2); - - // Draw the cursor on textboxes - - font_set_color(theme.text_color); - font_draw(font, text_x, text_y, text); // This is technically a frame late for updating the text? - - move_towards(^animation_state.click_time, 0.0f, theme.click_decay_speed); - - immediate_pop_scissor(); - return result; -} - - - - -// -// Checkboxes -// -Checkbox_Theme :: struct { - use text_theme := Text_Theme.{}; - use animation_theme := Animation_Theme.{}; - - box_color := Color.{ 0.2, 0.2, 0.2 }; - box_border_width := 4.0f; @InPixels - box_size := 20.0f; @InPixels - - checked_color := Color.{ 1, 0, 0 }; - checked_hover_color := Color.{ 1, 0.6, 0.6 }; - - background_color := Color.{ 0.05, 0.05, 0.05 }; // Background of the checkbox button. - hover_color := Color.{ 0.3, 0.3, 0.3 }; - click_color := Color.{ 0.5, 0.5, 0.7 }; -} - -#local default_checkbox_theme := Checkbox_Theme.{}; - -draw_checkbox :: (use r: Rect, value: ^bool, text: str, theme := ^default_checkbox_theme, site := #callsite, increment := 0) -> bool { - result := false; - - hash := get_site_hash(site, increment); - animation_state := get_animation(hash); - mx, my := mouse_get_position(); - - contains := Rect.contains(r, .{~~mx, ~~my}); - - if is_active_item(hash) { - if is_button_just_up(GLFW_MOUSE_BUTTON_LEFT) { - if is_hot_item(hash) && contains { - result = true; - *value = !*value; - animation_state.click_time = 1.0f; - } - - set_active_item(0); - } - } elseif is_hot_item(hash) { - if is_button_down(GLFW_MOUSE_BUTTON_LEFT) { - set_active_item(hash); - } - } - - if contains { - set_hot_item(hash); - } - - if is_hot_item(hash) { - move_towards(^animation_state.hover_time, 1.0f, theme.hover_speed); - } else { - move_towards(^animation_state.hover_time, 0.0f, theme.hover_speed); - } - - box_border_width := theme.box_border_width; - box_size := theme.box_size; - - immediate_set_color(theme.box_color); - immediate_rectangle(x + 4, y + (h - box_size) / 2, box_size, box_size); - - surface_color : Color; - if *value { - surface_color = theme.checked_color; - surface_color = color_lerp(animation_state.hover_time, surface_color, theme.checked_hover_color); - - } else { - surface_color = theme.background_color; - surface_color = color_lerp(animation_state.hover_time, surface_color, theme.hover_color); - } - - surface_color = color_lerp(animation_state.click_time, surface_color, theme.click_color); - - immediate_set_color(surface_color); - immediate_rectangle(x + 4 + box_border_width, y + (h - box_size) / 2 + box_border_width, box_size - box_border_width * 2, box_size - box_border_width * 2); - - font := font_lookup(.{theme.font_name, theme.font_size}); - text_width := font_get_width(font, text); - text_height := font_get_height(font, text); - - font_set_color(theme.text_color); - font_draw(font, x + box_size + 4 * 2, y + font.em + (h - text_height) / 2, text); - - move_towards(^animation_state.click_time, 0.0f, theme.click_decay_speed); - - return result; -} - - - -scrolling_region_start :: (r: Rect, max_y_scroll := 10000.0f, site := #callsite, increment := 0) { - hash := get_site_hash(site, increment); - mx, my := mouse_get_position(); - state := map.get_ptr(^scroll_states, hash); - if state == null { - animation_states[hash] = .{}; - state = ^scroll_states[hash]; - } - - contains := Rect.contains(r, .{~~mx, ~~my}); - if contains { - scroll_delta := mouse_get_scroll_vector(); - state.xscroll -= scroll_delta.x * 20; - state.yscroll -= scroll_delta.y * 20; - - state.yscroll = math.clamp(state.yscroll, 0, max_y_scroll); - } - - immediate_flush(); - immediate_push_scissor(r.x, r.y, r.w, r.h); - immediate_set_scroll(-state.xscroll, -state.yscroll); -} - -scrolling_region_stop :: () { - immediate_flush(); - immediate_pop_scissor(); - immediate_set_scroll(0, 0); -} - -#if !#defined(Rect) { - Rect :: struct { - x, y, w, h: f32; - - intersects :: (r1, r2: Rect) -> bool { - return r1.x <= r2.x + r2.w - && r1.x + r1.w >= r2.x - && r1.y <= r2.y + r2.h - && r1.y + r1.h >= r2.y; - } - - contains :: (r: Rect, p: Vector2) -> bool { - return r.x <= p.x && r.x + r.w >= p.x - && r.y <= p.y && r.y + r.h >= p.y; - } - } -} - -#if !#defined(move_towards) { - move_towards :: (v: ^$T, target: T, diff: T) { - if math.abs(target - *v) <= diff { - *v = target; - return; - } - } -} - - -#local { - hot_item : UI_Id = 0 - active_item : UI_Id = 0 - hot_item_was_set := false - - hot_item_depth := 0; - hot_item_depth_needed := 0; - - set_active_item :: (id: UI_Id) -> bool { - active_item = id; - return true; - } - - set_hot_item :: (id: UI_Id, force := false) -> bool { - if active_item != 0 do return false; - - if force { - hot_item_was_set = true; - hot_item = id; - return true; - } - - hot_item_depth += 1; - if hot_item_depth >= hot_item_depth_needed { - hot_item_was_set = true; - hot_item = id; - return true; - } - - return false; - } - - is_active_item :: (id: UI_Id) -> bool { - return active_item == id; - } - - is_hot_item :: (id: UI_Id) -> bool { - return hot_item == id; - } - - Text_Theme :: struct { - text_color := Color.{1, 1, 1}; - font_name := "./assets/fonts/calibri.ttf"; - font_size := 18; - } - - Animation_Theme :: struct { - hover_speed := 0.1f; - click_decay_speed := 0.08f; - } - - Animation_State :: struct { - hover_time := 0.0f; - click_time := 0.0f; - - accessed_this_frame := false; - } - - animation_states : Map(UI_Id, Animation_State); - - get_animation :: (id: UI_Id) -> ^Animation_State { - retval := map.get_ptr(^animation_states, id); - if retval == null { - animation_states[id] = .{}; - retval = ^animation_states[id]; - } - - retval.accessed_this_frame = true; - return retval; - } - - has_active_animation :: () -> bool { - for^ animation_states.entries { - if it.value.hover_time != 0.0f || it.value.hover_time != 0.0f do return true; - if it.value.click_time != 0.0f || it.value.click_time != 0.0f do return true; - } - - return false; - } - - - Scroll_State :: struct { - xscroll: f32; - yscroll: f32; - } - - scroll_states : Map(UI_Id, Scroll_State); - - get_site_hash :: macro (site: CallSite, increment := 0) -> UI_Id { - hash :: package core.hash - file_hash := hash.to_u32(site.file); - line_hash := hash.to_u32(site.line); - column_hash := hash.to_u32(site.column); - - return ~~ (file_hash * 0x472839 + line_hash * 0x6849210 + column_hash * 0x1248382 + increment); - } - - color_lerp :: macro (t: f32, c1, c2: Color) => Color.{ - r = c1.r * (1 - t) + c2.r * t, - g = c1.g * (1 - t) + c2.g * t, - b = c1.b * (1 - t) + c2.b * t, - a = c1.a * (1 - t) + c2.a * t, - }; -} diff --git a/src/main.onyx b/src/main.onyx deleted file mode 100644 index cdf4fff..0000000 --- a/src/main.onyx +++ /dev/null @@ -1,220 +0,0 @@ - -use package core -use package glfw3 -use package opengles -use package stb_truetype -use package core.intrinsics.onyx { __initialize } -#local runtime :: package runtime - -#local { - world_shader: Shader; - font: Font; - player: Player; - - fog_color :: Vector3.{ 0.6, 0.6, 0.6 }; -} - -world: ^World; -selected_block: Vector3i; - -@GlobalVariable -window: GLFWwindow_p; - -create_window :: () => { - #if runtime.compiler_os == .Linux { - glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3); - glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2); - glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API); - } else { - glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3); - glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0); - } - window = glfwCreateWindow(1600, 900, #cstr "Voxel Shooter"); - - glfwMakeContextCurrent(window); - glfwSwapInterval(1); - glfwSetWindowSizeCallback(window, "on_resize"); - glfwSetKeyCallback(window, "on_key"); - glfwSetMouseButtonCallback(window, "on_mouse_button"); -} - -#export "on_resize" (window: GLFWwindow_p, width, height: u32) { - glViewport(0, 0, width, height); - camera_set_window_size(^camera, ~~width, ~~height); - update_view_matrix(); - update_window_matrix(); -} - -cursor_grabbed := false; -toggle_cursor_grabbed :: () { - cursor_grabbed = !cursor_grabbed; - - if cursor_grabbed { - glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED); - - if glfwRawMouseMotionSupported() == GLFW_TRUE { - glfwSetInputMode(window, GLFW_RAW_MOUSE_MOTION, GLFW_TRUE); - } - } else { - glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_NORMAL); - - if glfwRawMouseMotionSupported() == GLFW_TRUE { - glfwSetInputMode(window, GLFW_RAW_MOUSE_MOTION, GLFW_FALSE); - } - } -} - -setup_opengl :: () { - glInit(glfwGetLoadProcAddress()); - - input_bind_glfw_events(window); - - glEnable(GL_TEXTURE); - glEnable(GL_DEPTH_TEST); - glEnable(GL_CULL_FACE); - glFrontFace(GL_CW); - glCullFace(GL_BACK); - glEnable(GL_BLEND); - glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA); - - shaders_init(); - fonts_init(); - immediate_init(); - - world_shader = shader_make("assets/shaders/world.glsl"); - - shader_link_world_matrix_block(world_shader); - shader_set_uniform(world_shader, #cstr "u_fog_start", 50.0f); - shader_set_uniform(world_shader, #cstr "u_fog_range", 10.0f); - - font = font_lookup(.{"./assets/fonts/calibri.ttf", 32}); - - shader_use(world_shader); - world = world_make(); - player = player_make(); - player.camera = ^camera; - - __initialize(^camera); - camera_set_fov(^camera, 75); - ww, wh: i32; - glfwGetWindowSize(window, ^ww, ^wh); - camera_set_window_size(^camera, ~~ww, ~~wh); - - update_view_matrix(); - update_world_matrix(); - update_model_matrix(.{0, 0, 0}); - update_window_matrix(); -} - -update :: (dt: f32) { - input_update(); - defer input_post_update(); - - if is_key_just_down(GLFW_KEY_ESCAPE) { - if cursor_grabbed { - toggle_cursor_grabbed(); - } else { - glfwSetWindowShouldClose(window, true); - } - } - - if !cursor_grabbed { - if is_button_just_down(GLFW_MOUSE_BUTTON_LEFT) { - toggle_cursor_grabbed(); - } - return; - } - - player_update(^player, dt); - player_chunk := world_position_to_chunk(world, player.body.pos); - world_move_center(world, player_chunk); - world_update(world, dt); - - if is_key_just_down(GLFW_KEY_F7) { - debug_screen = !debug_screen; - } - - update_world_matrix(); -} - -#local { - debug_screen := true; - game_fps: i32; -} - -draw :: () { - draw_scene(); -} - -draw_scene :: () { - glClearColor(fog_color.x, fog_color.y, fog_color.z, 1); - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - - shader_use(world_shader); - shader_set_uniform(world_shader, #cstr "u_fog_color", fog_color); - shader_set_uniform(world_shader, #cstr "u_texture", 0); - glEnable(GL_DEPTH_TEST); - world_draw(world); - - glLineWidth(2); - chunk_highlight_block(~~selected_block.x, ~~selected_block.y, ~~selected_block.z); - - ww, wh: i32; - glfwGetWindowSize(window, ^ww, ^wh); - font_print(font, ~~(ww / 2), ~~(wh / 2), "."); - - if debug_screen { - immediate_set_color(.{1, 0, 1, 0.5}); - immediate_rectangle(0, 0, 528, 220); - - player_chunk := world_position_to_chunk(world, player.body.pos); - font_print(font, 0, 32, "FPS: {}", game_fps); - font_print(font, 0, 64, "Position: {}", camera.position); - font_print(font, 0, 96, "Facing: {}", camera.y_rot * 180 / math.PI); - font_print(font, 0, 128, "Looking at: {}", selected_block); - font_print(font, 0, 160, "Chunk: {}", player_chunk); - // font_print(font, 0, 192, "Chunks loading: {}", world.chunks_to_load.count); - font_print(font, 0, 192, "Heap: {.2}MB Freed: {.2}MB\n", cast(f32) alloc.heap.get_watermark() / (1024 * 1024), cast(f32) alloc.heap.get_freed_size() / (1024 * 1024)); - } - - glfwSwapBuffers(window); -} - -main_loop :: () { - last := glfwGetTime(); - now := last; - - seconds := 0.0; - frame_count := 0; - - while !glfwWindowShouldClose(window) { - glfwPollEvents(); - - now = glfwGetTime(); - dt := now - last; - last = now; - dt = math.clamp(dt, 0, 0.5); - - seconds += dt; - frame_count += 1; - if seconds >= 1 { - game_fps = ~~frame_count; - seconds -= 1; - frame_count = 0; - } - - update(cast(f32) dt); - draw(); - } -} - -main :: (args) => { - if !glfwInit() { - println("Failed to initialize GLFW"); - os.exit(1); - } - - create_window(); - setup_opengl(); - main_loop(); -} diff --git a/src/server/build.onyx b/src/server/build.onyx new file mode 100644 index 0000000..a73ae6c --- /dev/null +++ b/src/server/build.onyx @@ -0,0 +1,13 @@ +package runtime.vars + +#load "core/std" + +#local runtime :: package runtime +#load_path runtime.vars.ONYX_MODULE_DIR +#load_path "./../src/server" +#library_path "./lib" + +#load "./../src/config" +#load "server" + +#load "onyx_net/src/module" diff --git a/src/server/server.onyx b/src/server/server.onyx new file mode 100644 index 0000000..6af2a8e --- /dev/null +++ b/src/server/server.onyx @@ -0,0 +1,32 @@ + +use package core + +#local { + onet :: package onyx_net +} + +main :: (args) => { + addr: net.Socket_Address; + addr.port = 5123; + + host, err := onet.host_create(^addr, 16); + if err != .None { + os.exit(1); + } + + while true { + for host->get_events(timeout=1000) { + if it.type == .Connection do printf("{*}\n", it); + if it.type == .Disconnection do printf("{*}\n", it); + + if it.type == .Message { + printf("Message: {}\n", it.data); + + packet := new(onet.Packet); + packet.flags |= .Reliable; + packet.data = string.alloc_copy(it.data); @LEAK + onet.host_broadcast(host, 0, packet); @LEAK + } + } + } +} diff --git a/src/utils/camera.onyx b/src/utils/camera.onyx deleted file mode 100644 index c8bc72d..0000000 --- a/src/utils/camera.onyx +++ /dev/null @@ -1,91 +0,0 @@ -use package core - -@GlobalVariable -camera: Camera; - -Camera :: struct { - fov: f32; // Radians - window_width, window_height: f32; - - z_near := 0.01f; - z_far := 300.0f; - - x_rot, y_rot: f32; - position: Vector3; -} - -camera_set_fov :: (cam: ^Camera, fov: f32) { - cam.fov = fov * math.PI / 180; - cam.fov = math.clamp(cam.fov, 0, math.PI - 0.001f); -} - -camera_set_window_size :: (use cam: ^Camera, ww, wh: f32) { - window_width = ww; - window_height = wh; -} - -camera_get_view_matrix :: (use cam: ^Camera, out: [16] f32) { - ar := window_width / window_height; - z_range := z_far - z_near; - tan_half_fov := math.sin(fov / 2) / math.cos(fov / 2); - - out[0] = 1 / (tan_half_fov * ar); - out[5] = 1 / tan_half_fov; - out[10] = -z_far / z_range; - out[11] = -1; - out[14] = -z_far*z_near/z_range; -} - -camera_get_forward :: (use cam: ^Camera) -> Vector3 { - return Vector3.{ - math.cos(x_rot) * math.sin(y_rot), - -math.sin(x_rot), - math.cos(y_rot) * math.cos(x_rot) - } |> Vector3.norm(); -} - -camera_get_world_matrix :: (use cam: ^Camera, out: [16] f32) { - forward := Vector3.{ - math.cos(x_rot) * math.sin(y_rot), - -math.sin(x_rot), - math.cos(y_rot) * math.cos(x_rot) - } |> Vector3.norm(); - - side := Vector3.cross(forward, .{0,1,0}) |> Vector3.norm(); - new_up := Vector3.cross(side, forward); - - neg_pos := Vector3.neg(position); - neg_forward := Vector3.neg(forward); - - out[0] = side.x; - out[1] = new_up.x; - out[2] = neg_forward.x; - out[4] = side.y; - out[5] = new_up.y; - out[6] = neg_forward.y; - out[8] = side.z; - out[9] = new_up.z; - out[10] = neg_forward.z; - out[12] = Vector3.dot(side, neg_pos); - out[13] = Vector3.dot(new_up, neg_pos); - out[14] = Vector3.dot(neg_forward, neg_pos); - out[15] = 1; -} - -camera_get_window_matrix :: (use cam: ^Camera, out: [16] f32) { - top := 0.0f; - left := 0.0f; - right := cast(f32) window_width; - bottom := cast(f32) window_height; - far := 10.0f; - near := 0f; - - out[0] = 2 / (right - left); - out[5] = 2 / (top - bottom); - out[10] = -2 / (far - near); - out[12] = -(right + left) / (right - left); - out[13] = -(top + bottom) / (top - bottom); - out[14] = -(far + near) / (far - near); - out[15] = 1; -} - diff --git a/src/utils/input.onyx b/src/utils/input.onyx deleted file mode 100644 index 5273c50..0000000 --- a/src/utils/input.onyx +++ /dev/null @@ -1,139 +0,0 @@ -use package core -use package glfw3 - -// If you are offseting the mouse coordinate for world space -// or UI scrolling etc., set this function to be the function -// to ask for the current offset. Currently scaling the mouse -// coordinate is not supported, only linear translations. -Mouse_Offset_Function :: immediate_get_scroll - - -#local { - keys_this_frame : [..] u32 // Keys currently being pressed this frame - keys_pulse_frame : [..] u32 // Keys pressed during this frame, only set once per keypress - keys_last_frame : [..] u32 // Keys being pressed in the last frame - - buttons_this_frame: [8] bool // Mouse buttons being pressed this frame - buttons_last_frame: [8] bool // Mouse buttons being pressed last frame - - scroll_x: f64 - scroll_y: f64 -} - -input_update :: () { - glfwGetCursorPos(window, ^mouse_x, ^mouse_y); - - array.clear(^keys_pulse_frame); - for keys_this_frame { - if !array.contains(keys_last_frame, it) { - keys_pulse_frame << it; - } - } -} - -input_post_update :: () { - array.clear(^keys_pulse_frame); - array.clear(^keys_last_frame); - for keys_this_frame do keys_last_frame << it; - - for 8 do buttons_last_frame[it] = buttons_this_frame[it]; - - last_mouse_x = mouse_x; - last_mouse_y = mouse_y; - scroll_x = 0; - scroll_y = 0; -} - -input_get_keys_this_frame :: () -> [] u32 { - return keys_pulse_frame; -} - -is_key_down :: (key) => array.contains(keys_this_frame, key); -is_key_just_down :: (key) => array.contains(keys_this_frame, key) && !array.contains(keys_last_frame, key); -is_key_just_up :: (key) => !array.contains(keys_this_frame, key) && array.contains(keys_last_frame, key); - -is_button_down :: (button) => buttons_this_frame[button]; -is_button_just_down :: (button) => buttons_this_frame[button] && !buttons_last_frame[button]; -is_button_just_up :: (button) => !buttons_this_frame[button] && buttons_last_frame[button]; - -#local { - last_mouse_x: f64; - last_mouse_y: f64; - - mouse_x: f64; - mouse_y: f64; -} - -mouse_get_delta :: () -> (f64, f64) { - return mouse_x - last_mouse_x, mouse_y - last_mouse_y; -} - -mouse_get_delta_vector :: () -> Vector2 { - dmx, dmy := mouse_get_delta(); - return .{ ~~dmx, ~~dmy }; -} - -mouse_get_position :: () -> (f64, f64) { - mx, my := mouse_x, mouse_y; - #if #defined(Mouse_Offset_Function) { - scroll := Mouse_Offset_Function(); - mx -= ~~ scroll.x; - my -= ~~ scroll.y; - } - return mx, my; -} - -mouse_get_position_vector :: () -> Vector2 { - mx, my := mouse_x, mouse_y; - #if #defined(Mouse_Offset_Function) { - scroll := Mouse_Offset_Function(); - mx -= ~~ scroll.x; - my -= ~~ scroll.y; - } - return .{ ~~mx, ~~my }; -} - -mouse_get_scroll :: () -> (f64, f64) { - return scroll_x, scroll_y; -} - -mouse_get_scroll_vector :: () -> Vector2 { - return .{ ~~scroll_x, ~~scroll_y }; -} - -input_bind_glfw_events :: (window: GLFWwindow_p) { - glfwSetKeyCallback(window, INPUT_KEY_EVENT); - glfwSetMouseButtonCallback(window, INPUT_BUTTON_EVENT); - glfwSetScrollCallback(window, INPUT_SCROLL_EVENT); -} - -#local { - INPUT_BUTTON_EVENT :: "__input_button_event" - INPUT_KEY_EVENT :: "__input_key_event" - INPUT_SCROLL_EVENT :: "__input_scroll_event" -} - -#export INPUT_BUTTON_EVENT (window: GLFWwindow_p, button, action, mod: u32) { - if action == GLFW_PRESS { - buttons_this_frame[button] = true; - } - - if action == GLFW_RELEASE { - buttons_this_frame[button] = false; - } -} - -#export INPUT_KEY_EVENT (window: GLFWwindow_p, key, scancode, action, mod: u32) { - if action == GLFW_PRESS { - keys_this_frame << key; - } - - if action == GLFW_RELEASE { - array.remove(^keys_this_frame, key); - } -} - -#export INPUT_SCROLL_EVENT (window: GLFWwindow_p, xoff, yoff: f64) { - scroll_x = xoff; - scroll_y = yoff; -} diff --git a/src/utils/logger.onyx b/src/utils/logger.onyx deleted file mode 100644 index 4947e53..0000000 --- a/src/utils/logger.onyx +++ /dev/null @@ -1,43 +0,0 @@ -// -// This may become an in-game or external file logger in the future, -// but for now this is just for logging to the command line. - -use package core - -Log_Level :: enum { - Debug; - Info; - Warning; - Error; - Critical; -} - -debug_set_level :: (level: Log_Level) { - log_level = level; -} - -debug_log :: (level: Log_Level, format: str, args: ..any) { - debug_log_va(level, format, ~~args); -} - -debug_log_va :: (level: Log_Level, format: str, args: [] any) { - if level < log_level do return; - - buf: [2048] u8; - output := conv.format_va(buf, format, args); - printf("[{w5}] {}\n", level_string(level), output); -} - -#local level_string :: (level: Log_Level) => { - switch level { - case .Debug do return "DEBUG"; - case .Info do return "INFO"; - case .Warning do return "WARN"; - case .Error do return "ERROR"; - case .Critical do return "CRIT"; - } - - return ""; -} - -#local log_level := Log_Level.Debug; \ No newline at end of file diff --git a/src/utils/utils.onyx b/src/utils/utils.onyx deleted file mode 100644 index 25a9873..0000000 --- a/src/utils/utils.onyx +++ /dev/null @@ -1,72 +0,0 @@ -use package core - -Ray :: struct { - origin, direction: Vector3; -} - - -ray_cast :: (ray: Ray, max_distance: f32, ctx: rawptr, is_solid: (rawptr, Vector3i) -> bool, out_block: ^Vector3i, out_dir: ^Vector3i) -> bool { - pos := Vector3i.{ ~~math.floor(ray.origin.x), ~~math.floor(ray.origin.y), ~~math.floor(ray.origin.z) }; - - dir := ray.direction; - step := Vector3i.{ ~~math.sign(dir.x), ~~math.sign(dir.y), ~~math.sign(dir.z) }; - - tmax: Vector3; - tmax.x = ((math.ceil(ray.origin.x) - ray.origin.x) if dir.x > 0 else (ray.origin.x - math.floor(ray.origin.x))) / math.abs(dir.x); - tmax.y = ((math.ceil(ray.origin.y) - ray.origin.y) if dir.y > 0 else (ray.origin.y - math.floor(ray.origin.y))) / math.abs(dir.y); - tmax.z = ((math.ceil(ray.origin.z) - ray.origin.z) if dir.z > 0 else (ray.origin.z - math.floor(ray.origin.z))) / math.abs(dir.z); - - tdelta := Vector3.{ ~~step.x / dir.x, ~~step.y / dir.y, ~~step.z / dir.z }; - radius := max_distance / Vector3.mag(dir); - - while true { - if is_solid(ctx, pos) { - *out_block = pos; - return true; - } - - if tmax.x < tmax.y { - if tmax.x < tmax.z { - if tmax.x > radius { - break; - } - - pos.x += step.x; - tmax.x += tdelta.x; - *out_dir = .{ -step.x, 0, 0 }; - - } else { - if tmax.z > radius { - break; - } - - pos.z += step.z; - tmax.z += tdelta.z; - *out_dir = .{ 0, 0, -step.z }; - } - - } else { - if tmax.y < tmax.z { - if tmax.y > radius { - break; - } - - pos.y += step.y; - tmax.y += tdelta.y; - *out_dir = .{ 0, -step.y, 0 }; - - } else { - if tmax.z > radius { - break; - } - - pos.z += step.z; - tmax.z += tdelta.z; - *out_dir = .{ 0, 0, -step.z }; - } - } - } - - return false; -} - diff --git a/src/utils/vecmath.onyx b/src/utils/vecmath.onyx deleted file mode 100644 index 6092a13..0000000 --- a/src/utils/vecmath.onyx +++ /dev/null @@ -1,74 +0,0 @@ -Vector2 :: struct { - #struct_tag conv.Custom_Format.{format_vector2} - x, y: f32; -} - -Vector3i :: struct { - #struct_tag conv.Custom_Format.{format_vector3i} - x, y, z: i32; -} - -Vector3 :: struct { - #struct_tag conv.Custom_Format.{format_vector3} - x, y, z: f32; - - mag :: macro (v: Vector3) => math.sqrt(v.x * v.x + v.y * v.y + v.z * v.z); - - neg :: macro (v: Vector3) => Vector3.{ -v.x, -v.y, -v.z }; - - dot :: macro (v1, v2: Vector3) -> f32 { - return v1.x * v2.x + v1.y * v2.y + v1.z * v2.z; - } - - norm :: macro (v: Vector3) -> Vector3 { - l := math.sqrt(v.x * v.x + v.y * v.y + v.z * v.z); - return .{ v.x / l, v.y / l, v.z / l }; - } - - cross :: macro (v1, v2: Vector3) -> Vector3 { - return .{ - v1.y * v2.z - v1.z * v2.y, - v1.z * v2.x - v1.x * v2.z, - v1.x * v2.y - v1.y * v2.x, - }; - } - - clamp :: macro (v: Vector3, min: Vector3, max: Vector3) -> Vector3 { - return .{ - math.clamp(v.x, min.x, max.x), - math.clamp(v.y, min.y, max.y), - math.clamp(v.z, min.z, max.z), - }; - } -} - -#operator + macro (v1, v2: Vector2) => (typeof v1).{ v1.x + v2.x, v1.y + v2.y }; -#operator - macro (v1, v2: Vector2) => Vector2.{ v1.x - v2.x, v1.y - v2.y }; -#operator * macro (v: Vector2, s: f32) => Vector2.{ v.x * s, v.y * s }; -#operator == macro (v1, v2: Vector2) => v1.x == v2.x && v1.y == v2.y; - -#operator + macro (v1, v2: Vector3) => Vector3.{ v1.x + v2.x, v1.y + v2.y, v1.z + v2.z }; -#operator - macro (v1, v2: Vector3) => Vector3.{ v1.x - v2.x, v1.y - v2.y, v1.z - v2.z }; -#operator * macro (v: Vector3, s: f32) => Vector3.{ v.x * s, v.y * s, v.z * s }; -#operator == macro (v1, v2: Vector3) => v1.x == v2.x && v1.y == v2.y && v1.z == v2.z; - -#operator + macro (v1, v2: Vector3i) => Vector3i.{ v1.x + v2.x, v1.y + v2.y, v1.z + v2.z }; -#operator - macro (v1, v2: Vector3i) => Vector3i.{ v1.x - v2.x, v1.y - v2.y, v1.z - v2.z }; -#operator * macro (v: Vector3i, s: i32) => Vector3i.{ v.x * s, v.y * s, v.z * s }; -#operator == macro (v1, v2: Vector3i) => v1.x == v2.x && v1.y == v2.y && v1.z == v2.z; - -#local { - conv :: package core.conv - - format_vector2 :: (output: ^conv.Format_Output, format: ^conv.Format, v: ^Vector2) { - conv.format(output, "({}, {})", v.x, v.y); - } - - format_vector3 :: (output: ^conv.Format_Output, format: ^conv.Format, v: ^Vector3) { - conv.format(output, "({}, {}, {})", v.x, v.y, v.z); - } - - format_vector3i :: (output: ^conv.Format_Output, format: ^conv.Format, v: ^Vector3i) { - conv.format(output, "({}, {}, {})", v.x, v.y, v.z); - } -} diff --git a/src/world/chunk.onyx b/src/world/chunk.onyx deleted file mode 100644 index c076957..0000000 --- a/src/world/chunk.onyx +++ /dev/null @@ -1,254 +0,0 @@ -use package core -use package opengles - -Block :: #distinct u32; -#operator == macro (b1, b2: Block) => cast(u32) b1 == cast(u32) b2; -#operator != macro (b1, b2: Block) => cast(u32) b1 != cast(u32) b2; - -Block_Empty :: cast(Block) 0; - -Block_Options :: struct { - texture_enabled := true; -} - -block_make :: (red, green, blue: f32, brightness: f32, options := Block_Options.{}) -> Block { - r := cast(u32) (red * 15.0f); - g := cast(u32) (green * 15.0f); - b := cast(u32) (blue * 15.0f); - i := cast(u32) (brightness * 15.0f); - - tex := 1 if options.texture_enabled else 0; - - return ~~((tex << 16) | (i << 12) | (b << 8) | (g << 4) | r); -} - -Chunk_Vertex :: struct { - position : Vector3; - texture : Vector2; - - // This field is broken up by bit, but Onyx does not (nor ever will) support bit-fields. - // - // 4-bits (0..3) - red color - // 4-bits (4..7) - green color - // 4-bits (8..11) - blue color - // 4-bits (12..15) - intensity - data: u32; -} - -Chunk_Size :: 32 - -Chunk :: struct { - coord: Vector3i; - position: Vector3; - blocks: [] Block; - - mesh: ^Mesh(Chunk_Vertex) = null; - mesh_dirty := false; -} - -chunk_make :: (x, y, z: i32, allocator := context.allocator) -> ^Chunk { - chunk := new(Chunk, allocator); - chunk.coord = .{ x, y, z }; - chunk.position = .{ - ~~(x * Chunk_Size), - ~~(y * Chunk_Size), - ~~(z * Chunk_Size), - }; - memory.alloc_slice(^chunk.blocks, Chunk_Size * Chunk_Size * Chunk_Size); - memory.fill_slice(chunk.blocks, Block_Empty); - return chunk; -} - -chunk_free :: (chunk: ^Chunk) { - chunk_destroy_mesh(chunk); - memory.free_slice(^chunk.blocks); - cfree(chunk); -} - -#local in_chunk_bounds :: macro (x, y, z: i32) -> bool { - if x < 0 do return false; - if x >= Chunk_Size do return false; - if y < 0 do return false; - if y >= Chunk_Size do return false; - if z < 0 do return false; - if z >= Chunk_Size do return false; - return true; -} - -chunk_coords_to_world :: (use chunk: ^Chunk, x, y, z: i32) -> Vector3i { - return coord * Chunk_Size + .{x,y,z}; -} - -chunk_set :: (use chunk: ^Chunk, x, y, z: i32, block: Block) { - if !in_chunk_bounds(x, y, z) do return; - blocks[x * Chunk_Size * Chunk_Size + y * Chunk_Size + z] = block; - mesh_dirty = true; -} - -chunk_get :: (use chunk: ^Chunk, x, y, z: i32) -> Block { - if !in_chunk_bounds(x, y, z) do return Block_Empty; - return blocks[x * Chunk_Size * Chunk_Size + y * Chunk_Size + z]; -} - -#local block_neighbors := Vector3i.[ - Vector3i.{ 0, 0, -1 }, - Vector3i.{ 1, 0, 0 }, - Vector3i.{ -1, 0, 0 }, - Vector3i.{ 0, 0, 1 }, - Vector3i.{ 0, 1, 0 }, - Vector3i.{ 0, -1, 0 }, -]; - -#local block_verticies := Vector3.[ - Vector3.{ 0, 0, 0 }, - Vector3.{ 0, 1, 0 }, - Vector3.{ 1, 1, 0 }, - Vector3.{ 1, 0, 0 }, - Vector3.{ 0, 0, 1 }, - Vector3.{ 0, 1, 1 }, - Vector3.{ 1, 1, 1 }, - Vector3.{ 1, 0, 1 }, -]; - -#local block_textures := Vector2.[ - Vector2.{ 0, 0 }, - Vector2.{ 0, 1 }, - Vector2.{ 1, 1 }, - Vector2.{ 1, 0 }, -]; - -#local block_texture_indicies := ([6] u32).[ - u32.[ 0, 2, 1, 0, 3, 2 ], - u32.[ 0, 2, 1, 0, 3, 2 ], - u32.[ 0, 2, 1, 0, 3, 2 ], - u32.[ 0, 1, 2, 0, 2, 3 ], - u32.[ 0, 1, 2, 0, 2, 3 ], - u32.[ 0, 1, 2, 0, 2, 3 ], -]; - -#local block_indicies := ([6] u32).[ - u32.[ 0, 2, 1, 0, 3, 2 ], - u32.[ 3, 6, 2, 3, 7, 6 ], - u32.[ 5, 0, 1, 5, 4, 0 ], - u32.[ 4, 5, 6, 4, 6, 7 ], - u32.[ 5, 1, 2, 5, 2, 6 ], - u32.[ 0, 4, 7, 0, 7, 3 ] -]; - -chunk_build_mesh :: (use chunk: ^Chunk) { - if mesh != null && mesh_dirty == false do return; - if mesh != null { - mesh_free(mesh); - mesh = null; - } - - verticies := array.make(Chunk_Vertex, capacity=512); - defer array.free(^verticies); - - chunk_foreach(chunk) { - if block == Block_Empty do continue; - - for i: 6 { - n := ^block_neighbors[i]; - nx := x + n.x; - ny := y + n.y; - nz := z + n.z; - - if chunk_get(chunk, nx, ny, nz) != Block_Empty do continue; - color := block; - l := ~~((cast(u32) color & 0xf000) >> 12) / 16.0f; - if i != 4 do l *= 0.75; - if i == 5 do l *= 0.75; - color = cast(Block) (((cast(u32) (l * 16.0f)) << 12) | (0xffff0fff & cast(u32) color)); - - indicies := cast([] u32) block_indicies[i]; - tex_indicies := cast([] u32) block_texture_indicies[i]; - for j: 6 { - v := block_verticies[indicies[j]]; - t := block_textures[tex_indicies[j]]; - verticies << .{ .{ ~~x+v.x, ~~y+v.y, ~~z+v.z }, t, ~~color }; - } - } - } - - mesh = mesh_make(verticies, .[]); - mesh_dirty = false; -} - -chunk_destroy_mesh :: (use chunk: ^Chunk) { - if mesh == null do return; - - mesh_free(mesh); - mesh = null; - - mesh_dirty = true; // Just in case this chunk will be reused later. -} - -#local block_texture: Texture; -chunk_draw :: (chunk: ^Chunk) { - if block_texture.filename.data == null { - block_texture', _ := texture_lookup("assets/textures/block.png"); - } - - texture_use(^block_texture); - update_model_matrix(chunk.position); - mesh_draw(chunk.mesh); -} - - -// Provides x, y, z, and block in the body -chunk_foreach :: macro (chunk: ^Chunk, body: Code) { - for x: Chunk_Size do for y: Chunk_Size do for z: Chunk_Size { - block := chunk.blocks[x * Chunk_Size * Chunk_Size + y * Chunk_Size + z]; - #insert body; - } -} - -#local block_highlight: ^Mesh(Chunk_Vertex); -chunk_highlight_block :: (x, y, z: f32) { - data := 0xf000; - - vertex_data := cast(^Chunk_Vertex) alloc.from_stack(sizeof Chunk_Vertex * 8); - vertex_data[0] = .{.{x-0.001,y-0.001,z-0.001},.{0,0},data}; - vertex_data[1] = .{.{x-0.001,y+1.001,z-0.001},.{0,0},data}; - vertex_data[2] = .{.{x+1.001,y+1.001,z-0.001},.{0,0},data}; - vertex_data[3] = .{.{x+1.001,y-0.001,z-0.001},.{0,0},data}; - vertex_data[4] = .{.{x-0.001,y-0.001,z+1.001},.{0,0},data}; - vertex_data[5] = .{.{x-0.001,y+1.001,z+1.001},.{0,0},data}; - vertex_data[6] = .{.{x+1.001,y+1.001,z+1.001},.{0,0},data}; - vertex_data[7] = .{.{x+1.001,y-0.001,z+1.001},.{0,0},data}; - - if block_highlight == null { - #persist index_data := u32.[ - 2, 1, 1, 0, // back - 0, 3, 3, 2, - - 6, 2, 2, 3, // right side - 3, 7, 7, 6, - - 0, 1, 1, 5, // left side - 5, 4, 4, 0, - - 4, 5, 5, 6, // front - 6, 7, 7, 4, - - 5, 1, 1, 2, // top - 2, 6, 6, 5, - - 0, 4, 4, 7, // bottom - 7, 3, 3, 0, - ]; - - mesh := mesh_make(vertex_data[0..8], index_data); - mesh.primitive = GL_LINES; - block_highlight = mesh; - - } else { - mesh_update_verticies(block_highlight, vertex_data[0 .. 8]); - } - - update_model_matrix(.{0,0,0}); - mesh_draw(block_highlight); -} - - diff --git a/src/world/physics.onyx b/src/world/physics.onyx deleted file mode 100644 index 746e39d..0000000 --- a/src/world/physics.onyx +++ /dev/null @@ -1,65 +0,0 @@ -use package core - -AABB :: struct { - x0, y0, z0, x1, y1, z1: f32; - - intersects :: (a1, a2: AABB) -> bool { - return a1.x0 < a2.x1 && a1.x1 > a2.x0 - && a1.y0 < a2.y1 && a1.y1 > a2.y0 - && a1.z0 < a2.z1 && a1.z1 > a2.z0; - } - - contains :: (a: AABB, v: Vector3) -> bool { - return a.x0 < v.x && v.x < a.x1 - && a.y0 < v.y && v.y < a.y1 - && a.z0 < v.z && v.z < a.z1; - } -} - -PhysicsBody :: struct { - pos: Vector3; - vel: Vector3; - acc: Vector3; - - on_ground := false; - - get_collision_object: (pos: Vector3) -> AABB; // This will get expanded on when other collision objects are defined -} - -physics_apply_gravity :: (use body: ^PhysicsBody) { - acc.y = -30; -} - -physics_simulate :: (use body: ^PhysicsBody, dt: f32, world: ^World) { - aabb_buffer := (cast(^AABB) alloc.from_stack(sizeof [256] AABB))[0..256]; - - aabbs := world_get_aabbs(world, pos, 3, aabb_buffer); - try_move :: macro (delta: Vector3) -> f32 { - new_pos := body.pos + delta; - body_aabb := get_collision_object(new_pos); - - for^ aabbs { - if AABB.intersects(body_aabb, *it) { - if delta.y < 0 do on_ground = true; - return 0; - } - } - - return 1; - } - - on_ground = false; - move_x := try_move(.{acc.x*0.5*dt*dt + vel.x * dt, 0, 0}); - move_y := try_move(.{0, acc.y*0.5*dt*dt + vel.y * dt, 0}); - move_z := try_move(.{0, 0, acc.z*0.5*dt*dt + vel.z * dt}); - - pos.x += vel.x * dt * move_x; - pos.y += vel.y * dt * move_y; - pos.z += vel.z * dt * move_z; - - vel += acc * dt; - - if on_ground do vel.y = 0; -} - - diff --git a/src/world/player.onyx b/src/world/player.onyx deleted file mode 100644 index 1c42616..0000000 --- a/src/world/player.onyx +++ /dev/null @@ -1,99 +0,0 @@ -use package core -use package glfw3 - -Player :: struct { - camera: ^Camera; // Should the camera exist on the player? Or should the player just control the camera? - body: PhysicsBody; -} - -player_make :: () -> Player { - player: Player; - - player.camera = null; - player.body = .{ - .{0,48,0}, - .{0,0,0}, - .{0,0,0}, - - get_collision_object = player_get_aabb - }; - - return player; -} - -player_update :: (use player: ^Player, dt: f32) { - speed := 6f; - if is_key_down(GLFW_KEY_LEFT_CONTROL) { - speed = 10; - } - if is_key_down(GLFW_KEY_LEFT_SHIFT) { - speed = 1; - } - - mdx, mdy := mouse_get_delta(); - camera.y_rot += ~~(-mdx / 400); - camera.x_rot += ~~( mdy / 400); - while camera.y_rot >= 2 * math.PI do camera.y_rot -= 2 * math.PI; - while camera.y_rot < 0 do camera.y_rot += 2 * math.PI; - camera.x_rot = math.clamp(camera.x_rot, -math.PI / 2 + 0.01, math.PI / 2 - 0.01); - - forward := camera_get_forward(camera); - facing := forward; - facing.y = 0; - facing = Vector3.norm(facing); - - xz_vel := Vector3.{0,0,0}; - if is_key_down(GLFW_KEY_W) do xz_vel += facing; - if is_key_down(GLFW_KEY_S) do xz_vel -= facing; - if is_key_down(GLFW_KEY_D) do xz_vel += Vector3.norm(Vector3.cross(facing, .{0,1,0})); - if is_key_down(GLFW_KEY_A) do xz_vel -= Vector3.norm(Vector3.cross(facing, .{0,1,0})); - - if Vector3.mag(xz_vel) > 0 do xz_vel = Vector3.norm(xz_vel) * speed; - body.vel.x = xz_vel.x; - body.vel.z = xz_vel.z; - - physics_apply_gravity(^body); - - if is_key_down(GLFW_KEY_SPACE) && body.on_ground { - body.acc.y = 500; - } - - if is_key_down(GLFW_KEY_B) && body.on_ground { - // Yeet yourself. - body.acc.y = 10000; - } - - physics_simulate(^body, dt, world); - - // Fix falling off the world - if body.pos.y < -100 do body.pos = .{0,48,0}; - - camera.position = body.pos; - - ray_cast_to_block :: (_, p) => world_get_block(world, p.x, p.y, p.z) != Block_Empty; - - dir: Vector3i; - if !ray_cast(.{ camera.position, forward }, 10, null, ray_cast_to_block, ^selected_block, ^dir) { - selected_block = .{0,0,0}; - } - - if is_button_just_down(GLFW_MOUSE_BUTTON_LEFT) { - world_set_block(world, selected_block.x, selected_block.y, selected_block.z, Block_Empty); - } - - if is_button_just_down(GLFW_MOUSE_BUTTON_RIGHT) { - target := selected_block + dir; - world_set_block(world, target.x, target.y, target.z, block_make(1,0,0,1)); - } -} - -player_get_aabb :: (pos: Vector3) -> AABB { - return .{ - x0 = pos.x - 0.3f, - y0 = pos.y - 1.8f, - z0 = pos.z - 0.3f, - x1 = pos.x + 0.3f, - y1 = pos.y + 0.1f, - z1 = pos.z + 0.3f, - }; -} diff --git a/src/world/world.onyx b/src/world/world.onyx deleted file mode 100644 index 397b380..0000000 --- a/src/world/world.onyx +++ /dev/null @@ -1,207 +0,0 @@ - -use package core - -World :: struct { - chunk_dist: i32; - chunks: [] ^Chunk; - - center_chunk: Vector3i; - - chunks_to_load: [..] Vector3i; -} - -world_make :: (allocator := context.allocator) -> ^World { - world := new(World, allocator); - world.chunk_dist = 2; - world.center_chunk = .{0,0,0}; - - sl := world.chunk_dist * 2 + 1; - memory.alloc_slice(^world.chunks, sl * sl * sl); - memory.fill_slice(world.chunks, null); - - return world; -} - -world_load_chunk :: (world: ^World, chunk_to_load: Vector3i) { - // - // For now, no persistence will happen to the chunk, so generate a completely new chunk. - // - chunk := chunk_make(chunk_to_load.x, chunk_to_load.y, chunk_to_load.z); - generate_chunk(world, chunk); - world_set_chunk(world, chunk_to_load, chunk); -} - -world_unload_chunk :: #match { - (world: ^World, chunk_to_unload: Vector3i) { - chunk := world_get_chunk(world, chunk_to_unload); - world_unload_chunk(world, chunk); - world_set_chunk(world, chunk_to_unload, null); - }, - - (world: ^World, chunk: ^Chunk) { - if chunk != null { - chunk_free(chunk); - } - } -} - -world_get_chunk :: #match { - @CompilerBug // If I write the following function in quick form: - // - // (world: ^World, v: Vector3i) => world_get_chunk(world, v.x, v.y, v.z), - // - // the ',' at the end appears to mean "compound expression", so the following - // function defintion gets lumped as the second return result. Maybe there - // should be a special case for parsing this? I've always hated how parsing - // inside of a #match block works. - // - - (world: ^World, x, y, z: i32) -> ^Chunk { - d := world.chunk_dist; - sl := d * 2 + 1; - - ix := x - world.center_chunk.x + d; - iy := y - world.center_chunk.y + d; - iz := z - world.center_chunk.z + d; - if ix < 0 || ix > 2 * world.chunk_dist do return null; - if iy < 0 || iy > 2 * world.chunk_dist do return null; - if iz < 0 || iz > 2 * world.chunk_dist do return null; - - return world.chunks[ix * sl * sl + iy * sl + iz]; - }, - - (world: ^World, v: Vector3i) => world_get_chunk(world, v.x, v.y, v.z) -} - -world_set_chunk :: #match { - (world: ^World, v: Vector3i, chunk: ^Chunk) -> #auto { return world_set_chunk(world, v.x, v.y, v.z, chunk); }, - - (world: ^World, x, y, z: i32, chunk: ^Chunk) -> bool { - d := world.chunk_dist; - sl := d * 2 + 1; - - ix := x - world.center_chunk.x + d; - iy := y - world.center_chunk.y + d; - iz := z - world.center_chunk.z + d; - if ix < 0 || ix > 2 * world.chunk_dist do return false; - if iy < 0 || iy > 2 * world.chunk_dist do return false; - if iz < 0 || iz > 2 * world.chunk_dist do return false; - - world.chunks[ix * sl * sl + iy * sl + iz] = chunk; - return true; - } -} - -// Getting around the stupidness that is integer arithmetic on modern processors -#local world_coord_to_chunk_and_block :: (world: ^World, x, y, z: i32) -> (chunk: Vector3i, block: Vector3i) { - chunk, block: Vector3i; - chunk.x = x / Chunk_Size; - chunk.y = y / Chunk_Size; - chunk.z = z / Chunk_Size; - block.x = x % Chunk_Size; - block.y = y % Chunk_Size; - block.z = z % Chunk_Size; - - if x < 0 && block.x != 0 { chunk.x -= 1; block.x += Chunk_Size; } - if y < 0 && block.y != 0 { chunk.y -= 1; block.y += Chunk_Size; } - if z < 0 && block.z != 0 { chunk.z -= 1; block.z += Chunk_Size; } - - return chunk, block; -} - -world_position_to_chunk :: (world: ^World, use pos: Vector3) -> Vector3i { - chunk: Vector3i; - chunk.x = ~~math.floor(x / ~~Chunk_Size); - chunk.y = ~~math.floor(y / ~~Chunk_Size); - chunk.z = ~~math.floor(z / ~~Chunk_Size); - return chunk; -} - -world_get_block :: (world: ^World, x, y, z: i32) -> Block { - chunk_pos, block_pos := world_coord_to_chunk_and_block(world, x, y, z); - chunk := world_get_chunk(world, chunk_pos); - if chunk == null do return Block_Empty; - return chunk_get(chunk, block_pos.x, block_pos.y, block_pos.z); -} - -world_set_block :: (world: ^World, x, y, z: i32, block: Block) { - chunk_pos, block_pos := world_coord_to_chunk_and_block(world, x, y, z); - chunk := world_get_chunk(world, chunk_pos); - if chunk == null do return; - chunk_set(chunk, block_pos.x, block_pos.y, block_pos.z, block); -} - -world_move_center :: (use world: ^World, new_center: Vector3i) { - if center_chunk == new_center do return; - - sl := world.chunk_dist * 2 + 1; - current_chunks := memory.copy_slice(world.chunks); - memory.fill_slice(world.chunks, null); - - center_chunk = new_center; - for current_chunks { - if it == null do continue; - if !world_set_chunk(world, it.coord, it) { - world_unload_chunk(world, it); - } - } - - array.clear(^chunks_to_load); - for x: center_chunk.x-world.chunk_dist .. center_chunk.x+world.chunk_dist+1 - do for y: center_chunk.y-world.chunk_dist .. center_chunk.y+world.chunk_dist+1 - do for z: center_chunk.z-world.chunk_dist .. center_chunk.z+world.chunk_dist+1 { - if world_get_chunk(world, x, y, z) == null do world.chunks_to_load << .{x, y, z}; - } - - memory.free_slice(^current_chunks); -} - -world_get_aabbs :: (use world: ^World, center: Vector3, radius: f32, buffer: [] AABB = .[]) -> [] AABB { - is_dynamic := buffer.count == 0; - aabbs: [..] AABB; - buffer_pos := 0; - - pos := Vector3i.{ ~~math.floor(center.x), ~~math.floor(center.y), ~~math.floor(center.z) }; - rad := cast(i32) math.ceil(radius); - - for x: pos.x-rad .. pos.x+rad+1 { - for y: pos.y-rad .. pos.y+rad+1 { - for z: pos.z-rad .. pos.z+rad+1 { - if world_get_block(world, x, y, z) != Block_Empty { - aabb := AABB.{ - ~~x, ~~y, ~~z, - ~~(x+1), ~~(y+1), ~~(z+1) - }; - - if is_dynamic { - aabbs << aabb; - } else { - buffer[buffer_pos] = aabb; - buffer_pos += 1; - if buffer_pos >= buffer.count do break break break; - } - } - } - } - } - - if is_dynamic do return aabbs; - return buffer[0 .. buffer_pos]; -} - -world_update :: (use world: ^World, dt: f32) { - if chunks_to_load.count > 0 { - chunk_to_load := chunks_to_load[0]; - array.delete(^chunks_to_load, 0); - - world_load_chunk(world, chunk_to_load); - } -} - -world_draw :: (use world: ^World) { - for chunks { - if it == null do continue; - chunk_build_mesh(it); - chunk_draw(it); - } -} diff --git a/src/world/worldgen.onyx b/src/world/worldgen.onyx deleted file mode 100644 index 583887d..0000000 --- a/src/world/worldgen.onyx +++ /dev/null @@ -1,30 +0,0 @@ - -use package core -#local perlin :: package perlin - -#local seed :: 8675309 - -generate_chunk :: (world: ^World, chunk: ^Chunk) { - for cz: 32 do for cx: 32 { - t := chunk_coords_to_world(chunk, cx, 0, cz); - px := cast(f64) t.x / 24; - pz := cast(f64) t.z / 24; - - n := perlin.noise(px, ~~(10 * seed), pz); - l := perlin.noise(px, ~~(10 * seed), pz); - l = (math.clamp(math.max(0, l), 0.2, 0.5) - 0.2) / 0.6 + 0.5; - h := cast(i32) (n * 32 + 18); - h = math.max(h, 14); - if n < -0.9 do h += ~~((n + 0.9) * 4); - - h -= chunk.coord.y * Chunk_Size; - if h >= 0 { chunk_set(chunk, cx, h, cz, block_make(0.2, 1, 0.2, ~~l)); h -= 1; } - for cy: 2 .. h+1 do chunk_set(chunk, cx, cy, cz, block_make(0.3, 0.3, 0.1, 1, .{texture_enabled=false})); - for cy: 0 .. math.min(h, 2)+1 do chunk_set(chunk, cx, cy, cz, block_make(0.2, 0.2, 0.2, 0.5, .{texture_enabled=false})); - } - - chunk_set(chunk, 0, 0, 0, block_make(1, 0, 1, 1)); - - debug_log(.Debug, "Generated chunk at {}.", chunk.position); -} -