diff --git a/.gitmodules b/.gitmodules deleted file mode 100644 index b33df10..0000000 --- a/.gitmodules +++ /dev/null @@ -1,3 +0,0 @@ -[submodule "contrib/Orochi"] - path = contrib/Orochi - url = https://github.com/GPUOpen-LibrariesAndSDKs/Orochi diff --git a/README.md b/README.md index 46c0563..a1f3e0b 100644 --- a/README.md +++ b/README.md @@ -36,17 +36,21 @@ You need an AMDGPU driver newer than 21.40. However, we recommend using 21.50 or - The header and the library which you need to download from [HIP RT prject page](https://gpuopen.com/hiprt/). - [tutorials](tutorials) - Tutorial source code -- [contrib](contrib) - - External dependencies ## Building the Tutorial -1. First you need to clone the repository, then init and update the submodules if you didn't clone with `--recursive`: - +1. First you need to get the dependencies. Use [Conan](https://conan.io/) to fetch and build them for you. +- Fetch and build Orochi: +```` +cd orochi_recipe +conan create . +```` +- Go to the root directory and configure the dependencies for the tutorial: ```` -git submodule init -git submodule update +mkdir build +cd build +conan install .. -s compiler.cppstd=17 --build missing ```` 2. Download the HIP RT SDK from [HIP RT prject page](https://gpuopen.com/hiprt/), copy hiprt directory to here. @@ -54,7 +58,7 @@ git submodule update ```` cd tutorials -../tools/premake5/win/premake5.exe vs2019 +../tools/premake5/win/premake5.exe vs2022 ```` 4. Open the solution, compile & run. These tutorials are made to run on both AMD and NVIDIA by specifying the device index. diff --git a/conanfile.txt b/conanfile.txt new file mode 100644 index 0000000..d36f121 --- /dev/null +++ b/conanfile.txt @@ -0,0 +1,7 @@ +[requires] +stb/cci.20210910 +tinyobjloader/1.0.6 +orochi/1.00 + +[generators] +premake \ No newline at end of file diff --git a/contrib/Orochi b/contrib/Orochi deleted file mode 160000 index c5d3934..0000000 --- a/contrib/Orochi +++ /dev/null @@ -1 +0,0 @@ -Subproject commit c5d3934617a4b83b23d30c775cc82816f78522ad diff --git a/contrib/stbi/stb_image.h b/contrib/stbi/stb_image.h deleted file mode 100644 index ab3486e..0000000 --- a/contrib/stbi/stb_image.h +++ /dev/null @@ -1,9563 +0,0 @@ -/* stb_image - v2.22 - 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: - - 2.22 (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 - John-Mark Allen - Carmelo J Fdez-Aguera - - Bug & warning fixes - Marc LeBlanc David Woo Guillaume George Martins -Mozeiko Christpher Lloyd Jerry Jansson Joseph Thomson 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 - Laurent Gomila Cort Stratton Sergio Gonzalez github:snagar - Aruelien Pocheville Thibault Reuille Cass Everitt github:Zelex - Ryamond Barbiero Paul Du Bois Engin Manap github:grim210 - Aldo Culquicondor Philipp Wiesemann Dale Weiler github:sammyhw - Oriol Ferrer Mesia Josh Tobin Matthew Gregan github:phprus - Julian Raschke Gregory Mullen Baldur Karlsson -github:poppolopoppo Christian Floisand Kevin Schmidt JR Smith -github:darealshinji Blazej Dariusz Roszkowski github:Michaelangel007 -*/ - -#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. -// -// =========================================================================== -// -// 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: -// -// By default we convert iphone-formatted PNGs back to RGB, even though -// they are internally encoded differently. You can disable this conversion -// by calling stbi_convert_iphone_png_to_rgb(0), in which case -// you will always just get the native iphone "format" through (which -// is BGR stored in RGB). -// -// 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 -// - -#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 -// NOT 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); - -// 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 -#include // ptrdiff_t on osx -#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 - -#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) >> (32 - (y)))) -#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 -// assume GCC or Clang on ARM targets -#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) -#endif - -#ifndef STBI_SIMD_ALIGN -#define STBI_SIMD_ALIGN(type, name) type name -#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]; - - 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->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->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) -{ - fseek((FILE*)user, n, SEEK_CUR); -} - -static int stbi__stdio_eof(void* user) { return feof((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); -#endif - -// this is not threadsafe -static const char* stbi__g_failure_reason; - -STBIDEF const char* stbi_failure_reason(void) { return stbi__g_failure_reason; } - -static int stbi__err(const char* str) -{ - stbi__g_failure_reason = str; - return 0; -} - -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; -} - -// 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); -} - -// 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) -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 - -// 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); -} - -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) -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 = 0; - -STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip) -{ - stbi__vertically_flip_on_load = flag_true_if_should_flip; -} - -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; - -#ifndef STBI_NO_JPEG - if (stbi__jpeg_test(s)) - return stbi__jpeg_load(s, x, y, comp, req_comp, ri); -#endif -#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); -#endif -#ifndef STBI_NO_PIC - if (stbi__pic_test(s)) - return stbi__pic_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; - - if (ri.bits_per_channel != 8) - { - STBI_ASSERT(ri.bits_per_channel == 16); - 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; - - if (ri.bits_per_channel != 16) - { - STBI_ASSERT(ri.bits_per_channel == 8); - 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(_MSC_VER) && 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(_MSC_VER) && 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(_MSC_VER) && defined(STBI_WINDOWS_UTF8) - wchar_t wMode[64]; - wchar_t wFilename[1024]; - if (0 == - MultiByteToWideChar( - 65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename))) - return 0; - - if (0 == MultiByteToWideChar( - 65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode))) - return 0; - -#if _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); - 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; -} - -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; -} - -static void stbi__skip(stbi__context* s, int n) -{ - 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; -} - -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; -} - -static int stbi__get16be(stbi__context* s) -{ - int z = stbi__get8(s); - return (z << 8) + stbi__get8(s); -} - -static stbi__uint32 stbi__get32be(stbi__context* s) -{ - stbi__uint32 z = stbi__get16be(s); - return (z << 16) + stbi__get16be(s); -} - -#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); - return z + (stbi__get16le(s) << 16); -} -#endif - -#define STBI__BYTECAST(x) \ - ((stbi_uc)((x)&255)) // truncate int to byte without warnings - -////////////////////////////////////////////////////////////////////////////// -// -// 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); -} - -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); - } -#undef STBI__CASE - } - - STBI_FREE(data); - return good; -} - -static stbi__uint16 stbi__compute_y_16(int r, int g, int b) -{ - return (stbi__uint16)(((r * 77) + (g * 150) + (29 * b)) >> 8); -} - -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); - } -#undef STBI__CASE - } - - STBI_FREE(data); - return good; -} - -#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 = (stbi__int32)j->code_buffer >> 31; // sign bit is always in MSB - k = stbi_lrot(j->code_buffer, n); - STBI_ASSERT(n >= 0 && - n < (int)(sizeof(stbi__bmask) / sizeof(*stbi__bmask))); - j->code_buffer = k & ~stbi__bmask[n]; - k &= stbi__bmask[n]; - j->code_bits -= n; - return k + (stbi__jbias[n] & ~sgn); -} - -// 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) - 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); - 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 << 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) << 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) << 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 - 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; - } - - // 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; - - // 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)); - 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)); - 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))); - 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) - -// 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[288]; - stbi__uint16 value[288]; -} 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 stbi_uc stbi__zget8(stbi__zbuf* z) -{ - if (z->zbuffer >= z->zbuffer_end) - return 0; - return *z->zbuffer++; -} - -static void stbi__fill_bits(stbi__zbuf* z) -{ - do - { - STBI_ASSERT(z->code_buffer < (1U << z->num_bits)); - 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]; - STBI_ASSERT(z->size[b] == s); - 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) - 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; - int cur, limit, old_limit; - z->zout = zout; - if (!z->z_expandable) - return stbi__err("output buffer limit", "Corrupt PNG"); - cur = (int)(z->zout - z->zout_start); - limit = old_limit = (int)(z->zout_end - z->zout_start); - while (cur + n > limit) 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 - { - STBI_ASSERT(c == 18); - c = stbi__zreceive(a, 7) + 11; - } - 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; - } - STBI_ASSERT(a->num_bits == 0); - // 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 ((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[288] = { - 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, 288)) - 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) - { - STBI_ASSERT(img_width_bytes <= x); - 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); - 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 = 0; -static int stbi__de_iphone_flag = 0; - -STBIDEF void stbi_set_unpremultiply_on_load( - int flag_true_if_should_unpremultiply) -{ - stbi__unpremultiply_on_load = flag_true_if_should_unpremultiply; -} - -STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert) -{ - stbi__de_iphone_flag = flag_true_if_should_convert; -} - -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); - if (s->img_x > (1 << 24)) - return stbi__err("too large", "Very large image (corrupt?)"); - s->img_y = stbi__get32be(s); - if (s->img_y > (1 << 24)) - 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; - 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 - ri->bits_per_channel = p->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; - z >>= 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 >= 0 && 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; -} stbi__bmp_data; - -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; - - 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"); - 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) - { - 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 - { - info->mr = 31u << 10; - info->mg = 31u << 5; - info->mb = 31u << 0; - } - } else if (compress == 3) - { - info->mr = stbi__get32le(s); - info->mg = stbi__get32le(s); - info->mb = stbi__get32le(s); - // 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 - { - 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); - 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); - - 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 - 14 - 24) / 3; - } else - { - if (info.bpp < 16) - psize = (info.offset - 14 - info.hsz) >> 2; - } - - 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 - 14 - 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 - 14 - 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); - } - 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); - - // 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) - { - // 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; - // 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); - - // 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; y < height; ++y) - { - int packet_idx; - - for (packet_idx = 0; packet_idx < num_packets; ++packet_idx) - { - stbi__pic_packet* packet = &packets[packet_idx]; - stbi_uc* dest = result + y * width * 4; - - switch (packet->type) - { - default: - return stbi__errpuc("bad format", - "packet has bad compression type"); - - case 0: - { // uncompressed - int x; - - for (x = 0; x < width; ++x, dest += 4) - if (!stbi__readval(s, packet->channel, 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; i < count; ++i, dest += 4) - stbi__copyval(packet->channel, 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; i < count; ++i, dest += 4) - stbi__copyval(packet->channel, dest, value); - } else - { // Raw - ++count; - if (count > left) - return stbi__errpuc("bad file", "scanline overrun"); - - for (i = 0; i < count; ++i, dest += 4) - if (!stbi__readval(s, packet->channel, 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 (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); - 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 (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 (!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 dispoase 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(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; - 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) - { - out = (stbi_uc*)STBI_REALLOC(out, layers * stride); - if (delays) - { - *delays = - (int*)STBI_REALLOC(*delays, sizeof(int) * layers); - } - } else - { - out = (stbi_uc*)stbi__malloc(layers * stride); - if (delays) - { - *delays = (int*)stbi__malloc(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); - - *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); - stbi__rewind(s); - if (p == NULL) - return 0; - if (x) - *x = s->img_x; - if (y) - *y = s->img_y; - if (comp) - *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; - } - (void)stbi__get32be(s); - (void)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) -// Does not support 16-bit-per-channel - -#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); - - if (!stbi__pnm_info(s, (int*)&s->img_x, (int*)&s->img_y, (int*)&s->img_n)) - return 0; - - *x = s->img_x; - *y = s->img_y; - if (comp) - *comp = s->img_n; - - if (!stbi__mad3sizes_valid(s->img_n, s->img_x, s->img_y, 0)) - return stbi__errpuc("too large", "PNM too large"); - - out = (stbi_uc*)stbi__malloc_mad3(s->img_n, s->img_x, s->img_y, 0); - if (!out) - return stbi__errpuc("outofmem", "Out of memory"); - stbi__getn(s, out, s->img_n * s->img_x * s->img_y); - - 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 > 255) - return stbi__err("max value > 255", "PPM image not 8-bit"); - else - return 1; -} -#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 - - 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. ------------------------------------------------------------------------------- -*/ \ No newline at end of file diff --git a/contrib/stbi/stbi_image_write.h b/contrib/stbi/stbi_image_write.h deleted file mode 100644 index f2458f2..0000000 --- a/contrib/stbi/stbi_image_write.h +++ /dev/null @@ -1,1617 +0,0 @@ -/* stb_image_write - v1.13 - public domain - http://nothings.org/stb/stb_image_write.h - writes out PNG/BMP/TGA/JPEG/HDR images to C stdio - Sean Barrett 2010-2015 - no warranty implied; use at your own risk - - Before #including, - - #define STB_IMAGE_WRITE_IMPLEMENTATION - - in the file that you want to have the implementation. - - Will probably not work correctly with strict-aliasing optimizations. - -ABOUT: - - This header file is a library for writing images to C stdio or a callback. - - The PNG output is not optimal; it is 20-50% larger than the file - written by a decent optimizing implementation; though providing a custom - zlib compress function (see STBIW_ZLIB_COMPRESS) can mitigate that. - This library is designed for source code compactness and simplicity, - not optimal image file size or run-time performance. - -BUILDING: - - You can #define STBIW_ASSERT(x) before the #include to avoid using assert.h. - You can #define STBIW_MALLOC(), STBIW_REALLOC(), and STBIW_FREE() to replace - malloc,realloc,free. - You can #define STBIW_MEMMOVE() to replace memmove() - You can #define STBIW_ZLIB_COMPRESS to use a custom zlib-style compress function - for PNG compression (instead of the builtin one), it must have the following signature: - unsigned char * my_compress(unsigned char *data, int data_len, int *out_len, int quality); - The returned data will be freed with STBIW_FREE() (free() by default), - so it must be heap allocated with STBIW_MALLOC() (malloc() by default), - -UNICODE: - - If compiling for Windows and you wish to use Unicode filenames, compile - with - #define STBIW_WINDOWS_UTF8 - and pass utf8-encoded filenames. Call stbiw_convert_wchar_to_utf8 to convert - Windows wchar_t filenames to utf8. - -USAGE: - - There are five functions, one for each image file format: - - int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes); - int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data); - int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data); - int stbi_write_jpg(char const *filename, int w, int h, int comp, const void *data, int quality); - int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data); - - void stbi_flip_vertically_on_write(int flag); // flag is non-zero to flip data vertically - - There are also five equivalent functions that use an arbitrary write function. You are - expected to open/close your file-equivalent before and after calling these: - - int stbi_write_png_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data, int stride_in_bytes); - int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); - int stbi_write_tga_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); - int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const float *data); - int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality); - - where the callback is: - void stbi_write_func(void *context, void *data, int size); - - You can configure it with these global variables: - int stbi_write_tga_with_rle; // defaults to true; set to 0 to disable RLE - int stbi_write_png_compression_level; // defaults to 8; set to higher for more compression - int stbi_write_force_png_filter; // defaults to -1; set to 0..5 to force a filter mode - - - You can define STBI_WRITE_NO_STDIO to disable the file variant of these - functions, so the library will not use stdio.h at all. However, this will - also disable HDR writing, because it requires stdio for formatted output. - - Each function returns 0 on failure and non-0 on success. - - The functions create an image file defined by the parameters. The image - is a rectangle of pixels stored from left-to-right, top-to-bottom. - Each pixel contains 'comp' channels of data stored interleaved with 8-bits - per channel, in the following order: 1=Y, 2=YA, 3=RGB, 4=RGBA. (Y is - monochrome color.) The rectangle is 'w' pixels wide and 'h' pixels tall. - The *data pointer points to the first byte of the top-left-most pixel. - For PNG, "stride_in_bytes" is the distance in bytes from the first byte of - a row of pixels to the first byte of the next row of pixels. - - PNG creates output files with the same number of components as the input. - The BMP format expands Y to RGB in the file format and does not - output alpha. - - PNG supports writing rectangles of data even when the bytes storing rows of - data are not consecutive in memory (e.g. sub-rectangles of a larger image), - by supplying the stride between the beginning of adjacent rows. The other - formats do not. (Thus you cannot write a native-format BMP through the BMP - writer, both because it is in BGR order and because it may have padding - at the end of the line.) - - PNG allows you to set the deflate compression level by setting the global - variable 'stbi_write_png_compression_level' (it defaults to 8). - - HDR expects linear float data. Since the format is always 32-bit rgb(e) - data, alpha (if provided) is discarded, and for monochrome data it is - replicated across all three channels. - - TGA supports RLE or non-RLE compressed data. To use non-RLE-compressed - data, set the global variable 'stbi_write_tga_with_rle' to 0. - - JPEG does ignore alpha channels in input data; quality is between 1 and 100. - Higher quality looks better but results in a bigger image. - JPEG baseline (no JPEG progressive). - -CREDITS: - - - Sean Barrett - PNG/BMP/TGA - Baldur Karlsson - HDR - Jean-Sebastien Guay - TGA monochrome - Tim Kelsey - misc enhancements - Alan Hickman - TGA RLE - Emmanuel Julien - initial file IO callback implementation - Jon Olick - original jo_jpeg.cpp code - Daniel Gibson - integrate JPEG, allow external zlib - Aarni Koskela - allow choosing PNG filter - - bugfixes: - github:Chribba - Guillaume Chereau - github:jry2 - github:romigrou - Sergio Gonzalez - Jonas Karlsson - Filip Wasil - Thatcher Ulrich - github:poppolopoppo - Patrick Boettcher - github:xeekworx - Cap Petschulat - Simon Rodriguez - Ivan Tikhonov - github:ignotion - Adam Schackart - -LICENSE - - See end of file for license information. - -*/ - -#ifndef INCLUDE_STB_IMAGE_WRITE_H -#define INCLUDE_STB_IMAGE_WRITE_H - -#include - -// if STB_IMAGE_WRITE_STATIC causes problems, try defining STBIWDEF to 'inline' or 'static inline' -#ifndef STBIWDEF -#ifdef STB_IMAGE_WRITE_STATIC -#define STBIWDEF static -#else -#ifdef __cplusplus -#define STBIWDEF extern "C" -#else -#define STBIWDEF extern -#endif -#endif -#endif - -#ifndef STB_IMAGE_WRITE_STATIC // C++ forbids static forward declarations -extern int stbi_write_tga_with_rle; -extern int stbi_write_png_compression_level; -extern int stbi_write_force_png_filter; -#endif - -//#ifndef STBI_WRITE_NO_STDIO -STBIWDEF int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes); -STBIWDEF int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data); -STBIWDEF int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data); -STBIWDEF int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data); -STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality); - -#ifdef STBI_WINDOWS_UTF8 -STBIWDEF int stbiw_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input); -#endif -//#endif - -typedef void stbi_write_func(void *context, void *data, int size); - -STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data, int stride_in_bytes); -STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); -STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); -STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const float *data); -STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality); - -STBIWDEF void stbi_flip_vertically_on_write(int flip_boolean); - -#endif//INCLUDE_STB_IMAGE_WRITE_H - -#ifdef STB_IMAGE_WRITE_IMPLEMENTATION - -#ifdef _WIN32 - #ifndef _CRT_SECURE_NO_WARNINGS - #define _CRT_SECURE_NO_WARNINGS - #endif - #ifndef _CRT_NONSTDC_NO_DEPRECATE - #define _CRT_NONSTDC_NO_DEPRECATE - #endif -#endif - -#ifndef STBI_WRITE_NO_STDIO -#include -#endif // STBI_WRITE_NO_STDIO - -#include -#include -#include -#include - -#if defined(STBIW_MALLOC) && defined(STBIW_FREE) && (defined(STBIW_REALLOC) || defined(STBIW_REALLOC_SIZED)) -// ok -#elif !defined(STBIW_MALLOC) && !defined(STBIW_FREE) && !defined(STBIW_REALLOC) && !defined(STBIW_REALLOC_SIZED) -// ok -#else -#error "Must define all or none of STBIW_MALLOC, STBIW_FREE, and STBIW_REALLOC (or STBIW_REALLOC_SIZED)." -#endif - -#ifndef STBIW_MALLOC -#define STBIW_MALLOC(sz) malloc(sz) -#define STBIW_REALLOC(p,newsz) realloc(p,newsz) -#define STBIW_FREE(p) free(p) -#endif - -#ifndef STBIW_REALLOC_SIZED -#define STBIW_REALLOC_SIZED(p,oldsz,newsz) STBIW_REALLOC(p,newsz) -#endif - - -#ifndef STBIW_MEMMOVE -#define STBIW_MEMMOVE(a,b,sz) memmove(a,b,sz) -#endif - - -#ifndef STBIW_ASSERT -#include -#define STBIW_ASSERT(x) assert(x) -#endif - -#define STBIW_UCHAR(x) (unsigned char) ((x) & 0xff) - -#ifdef STB_IMAGE_WRITE_STATIC -static int stbi__flip_vertically_on_write=0; -static int stbi_write_png_compression_level = 8; -static int stbi_write_tga_with_rle = 1; -static int stbi_write_force_png_filter = -1; -#else -int stbi_write_png_compression_level = 8; -int stbi__flip_vertically_on_write=0; -int stbi_write_tga_with_rle = 1; -int stbi_write_force_png_filter = -1; -#endif - -STBIWDEF void stbi_flip_vertically_on_write(int flag) -{ - stbi__flip_vertically_on_write = flag; -} - -typedef struct -{ - stbi_write_func *func; - void *context; -} stbi__write_context; - -// initialize a callback-based context -static void stbi__start_write_callbacks(stbi__write_context *s, stbi_write_func *c, void *context) -{ - s->func = c; - s->context = context; -} - -#ifndef STBI_WRITE_NO_STDIO - -static void stbi__stdio_write(void *context, void *data, int size) -{ - fwrite(data,1,size,(FILE*) context); -} - -#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8) -#ifdef __cplusplus -#define STBIW_EXTERN extern "C" -#else -#define STBIW_EXTERN extern -#endif -STBIW_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide); -STBIW_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); - -STBIWDEF int stbiw_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 *stbiw__fopen(char const *filename, char const *mode) -{ - FILE *f; -#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8) - wchar_t wMode[64]; - wchar_t wFilename[1024]; - if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename))) - return 0; - - if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode))) - return 0; - -#if _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; -} - -static int stbi__start_write_file(stbi__write_context *s, const char *filename) -{ - FILE *f = stbiw__fopen(filename, "wb"); - stbi__start_write_callbacks(s, stbi__stdio_write, (void *) f); - return f != NULL; -} - -static void stbi__end_write_file(stbi__write_context *s) -{ - fclose((FILE *)s->context); -} - -#endif // !STBI_WRITE_NO_STDIO - -typedef unsigned int stbiw_uint32; -typedef int stb_image_write_test[sizeof(stbiw_uint32)==4 ? 1 : -1]; - -static void stbiw__writefv(stbi__write_context *s, const char *fmt, va_list v) -{ - while (*fmt) { - switch (*fmt++) { - case ' ': break; - case '1': { unsigned char x = STBIW_UCHAR(va_arg(v, int)); - s->func(s->context,&x,1); - break; } - case '2': { int x = va_arg(v,int); - unsigned char b[2]; - b[0] = STBIW_UCHAR(x); - b[1] = STBIW_UCHAR(x>>8); - s->func(s->context,b,2); - break; } - case '4': { stbiw_uint32 x = va_arg(v,int); - unsigned char b[4]; - b[0]=STBIW_UCHAR(x); - b[1]=STBIW_UCHAR(x>>8); - b[2]=STBIW_UCHAR(x>>16); - b[3]=STBIW_UCHAR(x>>24); - s->func(s->context,b,4); - break; } - default: - STBIW_ASSERT(0); - return; - } - } -} - -static void stbiw__writef(stbi__write_context *s, const char *fmt, ...) -{ - va_list v; - va_start(v, fmt); - stbiw__writefv(s, fmt, v); - va_end(v); -} - -static void stbiw__putc(stbi__write_context *s, unsigned char c) -{ - s->func(s->context, &c, 1); -} - -static void stbiw__write3(stbi__write_context *s, unsigned char a, unsigned char b, unsigned char c) -{ - unsigned char arr[3]; - arr[0] = a; arr[1] = b; arr[2] = c; - s->func(s->context, arr, 3); -} - -static void stbiw__write_pixel(stbi__write_context *s, int rgb_dir, int comp, int write_alpha, int expand_mono, unsigned char *d) -{ - unsigned char bg[3] = { 255, 0, 255}, px[3]; - int k; - - if (write_alpha < 0) - s->func(s->context, &d[comp - 1], 1); - - switch (comp) { - case 2: // 2 pixels = mono + alpha, alpha is written separately, so same as 1-channel case - case 1: - if (expand_mono) - stbiw__write3(s, d[0], d[0], d[0]); // monochrome bmp - else - s->func(s->context, d, 1); // monochrome TGA - break; - case 4: - if (!write_alpha) { - // composite against pink background - for (k = 0; k < 3; ++k) - px[k] = bg[k] + ((d[k] - bg[k]) * d[3]) / 255; - stbiw__write3(s, px[1 - rgb_dir], px[1], px[1 + rgb_dir]); - break; - } - /* FALLTHROUGH */ - case 3: - stbiw__write3(s, d[1 - rgb_dir], d[1], d[1 + rgb_dir]); - break; - } - if (write_alpha > 0) - s->func(s->context, &d[comp - 1], 1); -} - -static void stbiw__write_pixels(stbi__write_context *s, int rgb_dir, int vdir, int x, int y, int comp, void *data, int write_alpha, int scanline_pad, int expand_mono) -{ - stbiw_uint32 zero = 0; - int i,j, j_end; - - if (y <= 0) - return; - - if (stbi__flip_vertically_on_write) - vdir *= -1; - - if (vdir < 0) { - j_end = -1; j = y-1; - } else { - j_end = y; j = 0; - } - - for (; j != j_end; j += vdir) { - for (i=0; i < x; ++i) { - unsigned char *d = (unsigned char *) data + (j*x+i)*comp; - stbiw__write_pixel(s, rgb_dir, comp, write_alpha, expand_mono, d); - } - s->func(s->context, &zero, scanline_pad); - } -} - -static int stbiw__outfile(stbi__write_context *s, int rgb_dir, int vdir, int x, int y, int comp, int expand_mono, void *data, int alpha, int pad, const char *fmt, ...) -{ - if (y < 0 || x < 0) { - return 0; - } else { - va_list v; - va_start(v, fmt); - stbiw__writefv(s, fmt, v); - va_end(v); - stbiw__write_pixels(s,rgb_dir,vdir,x,y,comp,data,alpha,pad, expand_mono); - return 1; - } -} - -static int stbi_write_bmp_core(stbi__write_context *s, int x, int y, int comp, const void *data) -{ - int pad = (-x*3) & 3; - return stbiw__outfile(s,-1,-1,x,y,comp,1,(void *) data,0,pad, - "11 4 22 4" "4 44 22 444444", - 'B', 'M', 14+40+(x*3+pad)*y, 0,0, 14+40, // file header - 40, x,y, 1,24, 0,0,0,0,0,0); // bitmap header -} - -STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data) -{ - stbi__write_context s; - stbi__start_write_callbacks(&s, func, context); - return stbi_write_bmp_core(&s, x, y, comp, data); -} - -#ifndef STBI_WRITE_NO_STDIO -STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data) -{ - stbi__write_context s; - if (stbi__start_write_file(&s,filename)) { - int r = stbi_write_bmp_core(&s, x, y, comp, data); - stbi__end_write_file(&s); - return r; - } else - return 0; -} -#endif //!STBI_WRITE_NO_STDIO - -static int stbi_write_tga_core(stbi__write_context *s, int x, int y, int comp, void *data) -{ - int has_alpha = (comp == 2 || comp == 4); - int colorbytes = has_alpha ? comp-1 : comp; - int format = colorbytes < 2 ? 3 : 2; // 3 color channels (RGB/RGBA) = 2, 1 color channel (Y/YA) = 3 - - if (y < 0 || x < 0) - return 0; - - if (!stbi_write_tga_with_rle) { - return stbiw__outfile(s, -1, -1, x, y, comp, 0, (void *) data, has_alpha, 0, - "111 221 2222 11", 0, 0, format, 0, 0, 0, 0, 0, x, y, (colorbytes + has_alpha) * 8, has_alpha * 8); - } else { - int i,j,k; - int jend, jdir; - - stbiw__writef(s, "111 221 2222 11", 0,0,format+8, 0,0,0, 0,0,x,y, (colorbytes + has_alpha) * 8, has_alpha * 8); - - if (stbi__flip_vertically_on_write) { - j = 0; - jend = y; - jdir = 1; - } else { - j = y-1; - jend = -1; - jdir = -1; - } - for (; j != jend; j += jdir) { - unsigned char *row = (unsigned char *) data + j * x * comp; - int len; - - for (i = 0; i < x; i += len) { - unsigned char *begin = row + i * comp; - int diff = 1; - len = 1; - - if (i < x - 1) { - ++len; - diff = memcmp(begin, row + (i + 1) * comp, comp); - if (diff) { - const unsigned char *prev = begin; - for (k = i + 2; k < x && len < 128; ++k) { - if (memcmp(prev, row + k * comp, comp)) { - prev += comp; - ++len; - } else { - --len; - break; - } - } - } else { - for (k = i + 2; k < x && len < 128; ++k) { - if (!memcmp(begin, row + k * comp, comp)) { - ++len; - } else { - break; - } - } - } - } - - if (diff) { - unsigned char header = STBIW_UCHAR(len - 1); - s->func(s->context, &header, 1); - for (k = 0; k < len; ++k) { - stbiw__write_pixel(s, -1, comp, has_alpha, 0, begin + k * comp); - } - } else { - unsigned char header = STBIW_UCHAR(len - 129); - s->func(s->context, &header, 1); - stbiw__write_pixel(s, -1, comp, has_alpha, 0, begin); - } - } - } - } - return 1; -} - -STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data) -{ - stbi__write_context s; - stbi__start_write_callbacks(&s, func, context); - return stbi_write_tga_core(&s, x, y, comp, (void *) data); -} - -#ifndef STBI_WRITE_NO_STDIO -STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data) -{ - stbi__write_context s; - if (stbi__start_write_file(&s,filename)) { - int r = stbi_write_tga_core(&s, x, y, comp, (void *) data); - stbi__end_write_file(&s); - return r; - } else - return 0; -} -#endif - -// ************************************************************************************************* -// Radiance RGBE HDR writer -// by Baldur Karlsson - -#define stbiw__max(a, b) ((a) > (b) ? (a) : (b)) - -static void stbiw__linear_to_rgbe(unsigned char *rgbe, float *linear) -{ - int exponent; - float maxcomp = stbiw__max(linear[0], stbiw__max(linear[1], linear[2])); - - if (maxcomp < 1e-32f) { - rgbe[0] = rgbe[1] = rgbe[2] = rgbe[3] = 0; - } else { - float normalize = (float) frexp(maxcomp, &exponent) * 256.0f/maxcomp; - - rgbe[0] = (unsigned char)(linear[0] * normalize); - rgbe[1] = (unsigned char)(linear[1] * normalize); - rgbe[2] = (unsigned char)(linear[2] * normalize); - rgbe[3] = (unsigned char)(exponent + 128); - } -} - -static void stbiw__write_run_data(stbi__write_context *s, int length, unsigned char databyte) -{ - unsigned char lengthbyte = STBIW_UCHAR(length+128); - STBIW_ASSERT(length+128 <= 255); - s->func(s->context, &lengthbyte, 1); - s->func(s->context, &databyte, 1); -} - -static void stbiw__write_dump_data(stbi__write_context *s, int length, unsigned char *data) -{ - unsigned char lengthbyte = STBIW_UCHAR(length); - STBIW_ASSERT(length <= 128); // inconsistent with spec but consistent with official code - s->func(s->context, &lengthbyte, 1); - s->func(s->context, data, length); -} - -static void stbiw__write_hdr_scanline(stbi__write_context *s, int width, int ncomp, unsigned char *scratch, float *scanline) -{ - unsigned char scanlineheader[4] = { 2, 2, 0, 0 }; - unsigned char rgbe[4]; - float linear[3]; - int x; - - scanlineheader[2] = (width&0xff00)>>8; - scanlineheader[3] = (width&0x00ff); - - /* skip RLE for images too small or large */ - if (width < 8 || width >= 32768) { - for (x=0; x < width; x++) { - switch (ncomp) { - case 4: /* fallthrough */ - case 3: linear[2] = scanline[x*ncomp + 2]; - linear[1] = scanline[x*ncomp + 1]; - linear[0] = scanline[x*ncomp + 0]; - break; - default: - linear[0] = linear[1] = linear[2] = scanline[x*ncomp + 0]; - break; - } - stbiw__linear_to_rgbe(rgbe, linear); - s->func(s->context, rgbe, 4); - } - } else { - int c,r; - /* encode into scratch buffer */ - for (x=0; x < width; x++) { - switch(ncomp) { - case 4: /* fallthrough */ - case 3: linear[2] = scanline[x*ncomp + 2]; - linear[1] = scanline[x*ncomp + 1]; - linear[0] = scanline[x*ncomp + 0]; - break; - default: - linear[0] = linear[1] = linear[2] = scanline[x*ncomp + 0]; - break; - } - stbiw__linear_to_rgbe(rgbe, linear); - scratch[x + width*0] = rgbe[0]; - scratch[x + width*1] = rgbe[1]; - scratch[x + width*2] = rgbe[2]; - scratch[x + width*3] = rgbe[3]; - } - - s->func(s->context, scanlineheader, 4); - - /* RLE each component separately */ - for (c=0; c < 4; c++) { - unsigned char *comp = &scratch[width*c]; - - x = 0; - while (x < width) { - // find first run - r = x; - while (r+2 < width) { - if (comp[r] == comp[r+1] && comp[r] == comp[r+2]) - break; - ++r; - } - if (r+2 >= width) - r = width; - // dump up to first run - while (x < r) { - int len = r-x; - if (len > 128) len = 128; - stbiw__write_dump_data(s, len, &comp[x]); - x += len; - } - // if there's a run, output it - if (r+2 < width) { // same test as what we break out of in search loop, so only true if we break'd - // find next byte after run - while (r < width && comp[r] == comp[x]) - ++r; - // output run up to r - while (x < r) { - int len = r-x; - if (len > 127) len = 127; - stbiw__write_run_data(s, len, comp[x]); - x += len; - } - } - } - } - } -} - -static int stbi_write_hdr_core(stbi__write_context *s, int x, int y, int comp, float *data) -{ - if (y <= 0 || x <= 0 || data == NULL) - return 0; - else { - // Each component is stored separately. Allocate scratch space for full output scanline. - unsigned char *scratch = (unsigned char *) STBIW_MALLOC(x*4); - int i, len; - char buffer[128]; - char header[] = "#?RADIANCE\n# Written by stb_image_write.h\nFORMAT=32-bit_rle_rgbe\n"; - s->func(s->context, header, sizeof(header)-1); - -#ifdef __STDC_WANT_SECURE_LIB__ - len = sprintf_s(buffer, sizeof(buffer), "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x); -#else - len = sprintf(buffer, "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x); -#endif - s->func(s->context, buffer, len); - - for(i=0; i < y; i++) - stbiw__write_hdr_scanline(s, x, comp, scratch, data + comp*x*(stbi__flip_vertically_on_write ? y-1-i : i)); - STBIW_FREE(scratch); - return 1; - } -} - -STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data) -{ - stbi__write_context s; - stbi__start_write_callbacks(&s, func, context); - return stbi_write_hdr_core(&s, x, y, comp, (float *) data); -} - -#ifndef STBI_WRITE_NO_STDIO -STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data) -{ - stbi__write_context s; - if (stbi__start_write_file(&s,filename)) { - int r = stbi_write_hdr_core(&s, x, y, comp, (float *) data); - stbi__end_write_file(&s); - return r; - } else - return 0; -} -#endif // STBI_WRITE_NO_STDIO - - -////////////////////////////////////////////////////////////////////////////// -// -// PNG writer -// - -#ifndef STBIW_ZLIB_COMPRESS -// stretchy buffer; stbiw__sbpush() == vector<>::push_back() -- stbiw__sbcount() == vector<>::size() -#define stbiw__sbraw(a) ((int *) (a) - 2) -#define stbiw__sbm(a) stbiw__sbraw(a)[0] -#define stbiw__sbn(a) stbiw__sbraw(a)[1] - -#define stbiw__sbneedgrow(a,n) ((a)==0 || stbiw__sbn(a)+n >= stbiw__sbm(a)) -#define stbiw__sbmaybegrow(a,n) (stbiw__sbneedgrow(a,(n)) ? stbiw__sbgrow(a,n) : 0) -#define stbiw__sbgrow(a,n) stbiw__sbgrowf((void **) &(a), (n), sizeof(*(a))) - -#define stbiw__sbpush(a, v) (stbiw__sbmaybegrow(a,1), (a)[stbiw__sbn(a)++] = (v)) -#define stbiw__sbcount(a) ((a) ? stbiw__sbn(a) : 0) -#define stbiw__sbfree(a) ((a) ? STBIW_FREE(stbiw__sbraw(a)),0 : 0) - -static void *stbiw__sbgrowf(void **arr, int increment, int itemsize) -{ - int m = *arr ? 2*stbiw__sbm(*arr)+increment : increment+1; - void *p = STBIW_REALLOC_SIZED(*arr ? stbiw__sbraw(*arr) : 0, *arr ? (stbiw__sbm(*arr)*itemsize + sizeof(int)*2) : 0, itemsize * m + sizeof(int)*2); - STBIW_ASSERT(p); - if (p) { - if (!*arr) ((int *) p)[1] = 0; - *arr = (void *) ((int *) p + 2); - stbiw__sbm(*arr) = m; - } - return *arr; -} - -static unsigned char *stbiw__zlib_flushf(unsigned char *data, unsigned int *bitbuffer, int *bitcount) -{ - while (*bitcount >= 8) { - stbiw__sbpush(data, STBIW_UCHAR(*bitbuffer)); - *bitbuffer >>= 8; - *bitcount -= 8; - } - return data; -} - -static int stbiw__zlib_bitrev(int code, int codebits) -{ - int res=0; - while (codebits--) { - res = (res << 1) | (code & 1); - code >>= 1; - } - return res; -} - -static unsigned int stbiw__zlib_countm(unsigned char *a, unsigned char *b, int limit) -{ - int i; - for (i=0; i < limit && i < 258; ++i) - if (a[i] != b[i]) break; - return i; -} - -static unsigned int stbiw__zhash(unsigned char *data) -{ - stbiw_uint32 hash = data[0] + (data[1] << 8) + (data[2] << 16); - hash ^= hash << 3; - hash += hash >> 5; - hash ^= hash << 4; - hash += hash >> 17; - hash ^= hash << 25; - hash += hash >> 6; - return hash; -} - -#define stbiw__zlib_flush() (out = stbiw__zlib_flushf(out, &bitbuf, &bitcount)) -#define stbiw__zlib_add(code,codebits) \ - (bitbuf |= (code) << bitcount, bitcount += (codebits), stbiw__zlib_flush()) -#define stbiw__zlib_huffa(b,c) stbiw__zlib_add(stbiw__zlib_bitrev(b,c),c) -// default huffman tables -#define stbiw__zlib_huff1(n) stbiw__zlib_huffa(0x30 + (n), 8) -#define stbiw__zlib_huff2(n) stbiw__zlib_huffa(0x190 + (n)-144, 9) -#define stbiw__zlib_huff3(n) stbiw__zlib_huffa(0 + (n)-256,7) -#define stbiw__zlib_huff4(n) stbiw__zlib_huffa(0xc0 + (n)-280,8) -#define stbiw__zlib_huff(n) ((n) <= 143 ? stbiw__zlib_huff1(n) : (n) <= 255 ? stbiw__zlib_huff2(n) : (n) <= 279 ? stbiw__zlib_huff3(n) : stbiw__zlib_huff4(n)) -#define stbiw__zlib_huffb(n) ((n) <= 143 ? stbiw__zlib_huff1(n) : stbiw__zlib_huff2(n)) - -#define stbiw__ZHASH 16384 - -#endif // STBIW_ZLIB_COMPRESS - -STBIWDEF unsigned char * stbi_zlib_compress(unsigned char *data, int data_len, int *out_len, int quality) -{ -#ifdef STBIW_ZLIB_COMPRESS - // user provided a zlib compress implementation, use that - return STBIW_ZLIB_COMPRESS(data, data_len, out_len, quality); -#else // use builtin - static unsigned short lengthc[] = { 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, 259 }; - static unsigned char lengtheb[]= { 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 }; - static unsigned short distc[] = { 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, 32768 }; - static unsigned char disteb[] = { 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 }; - unsigned int bitbuf=0; - int i,j, bitcount=0; - unsigned char *out = NULL; - unsigned char ***hash_table = (unsigned char***) STBIW_MALLOC(stbiw__ZHASH * sizeof(char**)); - if (hash_table == NULL) - return NULL; - if (quality < 5) quality = 5; - - stbiw__sbpush(out, 0x78); // DEFLATE 32K window - stbiw__sbpush(out, 0x5e); // FLEVEL = 1 - stbiw__zlib_add(1,1); // BFINAL = 1 - stbiw__zlib_add(1,2); // BTYPE = 1 -- fixed huffman - - for (i=0; i < stbiw__ZHASH; ++i) - hash_table[i] = NULL; - - i=0; - while (i < data_len-3) { - // hash next 3 bytes of data to be compressed - int h = stbiw__zhash(data+i)&(stbiw__ZHASH-1), best=3; - unsigned char *bestloc = 0; - unsigned char **hlist = hash_table[h]; - int n = stbiw__sbcount(hlist); - for (j=0; j < n; ++j) { - if (hlist[j]-data > i-32768) { // if entry lies within window - int d = stbiw__zlib_countm(hlist[j], data+i, data_len-i); - if (d >= best) { best=d; bestloc=hlist[j]; } - } - } - // when hash table entry is too long, delete half the entries - if (hash_table[h] && stbiw__sbn(hash_table[h]) == 2*quality) { - STBIW_MEMMOVE(hash_table[h], hash_table[h]+quality, sizeof(hash_table[h][0])*quality); - stbiw__sbn(hash_table[h]) = quality; - } - stbiw__sbpush(hash_table[h],data+i); - - if (bestloc) { - // "lazy matching" - check match at *next* byte, and if it's better, do cur byte as literal - h = stbiw__zhash(data+i+1)&(stbiw__ZHASH-1); - hlist = hash_table[h]; - n = stbiw__sbcount(hlist); - for (j=0; j < n; ++j) { - if (hlist[j]-data > i-32767) { - int e = stbiw__zlib_countm(hlist[j], data+i+1, data_len-i-1); - if (e > best) { // if next match is better, bail on current match - bestloc = NULL; - break; - } - } - } - } - - if (bestloc) { - int d = (int) (data+i - bestloc); // distance back - STBIW_ASSERT(d <= 32767 && best <= 258); - for (j=0; best > lengthc[j+1]-1; ++j); - stbiw__zlib_huff(j+257); - if (lengtheb[j]) stbiw__zlib_add(best - lengthc[j], lengtheb[j]); - for (j=0; d > distc[j+1]-1; ++j); - stbiw__zlib_add(stbiw__zlib_bitrev(j,5),5); - if (disteb[j]) stbiw__zlib_add(d - distc[j], disteb[j]); - i += best; - } else { - stbiw__zlib_huffb(data[i]); - ++i; - } - } - // write out final bytes - for (;i < data_len; ++i) - stbiw__zlib_huffb(data[i]); - stbiw__zlib_huff(256); // end of block - // pad with 0 bits to byte boundary - while (bitcount) - stbiw__zlib_add(0,1); - - for (i=0; i < stbiw__ZHASH; ++i) - (void) stbiw__sbfree(hash_table[i]); - STBIW_FREE(hash_table); - - { - // compute adler32 on input - unsigned int s1=1, s2=0; - int blocklen = (int) (data_len % 5552); - j=0; - while (j < data_len) { - for (i=0; i < blocklen; ++i) { s1 += data[j+i]; s2 += s1; } - s1 %= 65521; s2 %= 65521; - j += blocklen; - blocklen = 5552; - } - stbiw__sbpush(out, STBIW_UCHAR(s2 >> 8)); - stbiw__sbpush(out, STBIW_UCHAR(s2)); - stbiw__sbpush(out, STBIW_UCHAR(s1 >> 8)); - stbiw__sbpush(out, STBIW_UCHAR(s1)); - } - *out_len = stbiw__sbn(out); - // make returned pointer freeable - STBIW_MEMMOVE(stbiw__sbraw(out), out, *out_len); - return (unsigned char *) stbiw__sbraw(out); -#endif // STBIW_ZLIB_COMPRESS -} - -static unsigned int stbiw__crc32(unsigned char *buffer, int len) -{ -#ifdef STBIW_CRC32 - return STBIW_CRC32(buffer, len); -#else - static unsigned int crc_table[256] = - { - 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3, - 0x0eDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, - 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, - 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, - 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, - 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, - 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F, - 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, - 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, - 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01, - 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, - 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, - 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, - 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, - 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, - 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, - 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, - 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, - 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, - 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, - 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, - 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79, - 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, - 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, - 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, - 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, - 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, - 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, - 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, - 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, - 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, - 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D - }; - - unsigned int crc = ~0u; - int i; - for (i=0; i < len; ++i) - crc = (crc >> 8) ^ crc_table[buffer[i] ^ (crc & 0xff)]; - return ~crc; -#endif -} - -#define stbiw__wpng4(o,a,b,c,d) ((o)[0]=STBIW_UCHAR(a),(o)[1]=STBIW_UCHAR(b),(o)[2]=STBIW_UCHAR(c),(o)[3]=STBIW_UCHAR(d),(o)+=4) -#define stbiw__wp32(data,v) stbiw__wpng4(data, (v)>>24,(v)>>16,(v)>>8,(v)); -#define stbiw__wptag(data,s) stbiw__wpng4(data, s[0],s[1],s[2],s[3]) - -static void stbiw__wpcrc(unsigned char **data, int len) -{ - unsigned int crc = stbiw__crc32(*data - len - 4, len+4); - stbiw__wp32(*data, crc); -} - -static unsigned char stbiw__paeth(int a, int b, int c) -{ - int p = a + b - c, pa = abs(p-a), pb = abs(p-b), pc = abs(p-c); - if (pa <= pb && pa <= pc) return STBIW_UCHAR(a); - if (pb <= pc) return STBIW_UCHAR(b); - return STBIW_UCHAR(c); -} - -// @OPTIMIZE: provide an option that always forces left-predict or paeth predict -static void stbiw__encode_png_line(unsigned char *pixels, int stride_bytes, int width, int height, int y, int n, int filter_type, signed char *line_buffer) -{ - static int mapping[] = { 0,1,2,3,4 }; - static int firstmap[] = { 0,1,0,5,6 }; - int *mymap = (y != 0) ? mapping : firstmap; - int i; - int type = mymap[filter_type]; - unsigned char *z = pixels + stride_bytes * (stbi__flip_vertically_on_write ? height-1-y : y); - int signed_stride = stbi__flip_vertically_on_write ? -stride_bytes : stride_bytes; - - if (type==0) { - memcpy(line_buffer, z, width*n); - return; - } - - // first loop isn't optimized since it's just one pixel - for (i = 0; i < n; ++i) { - switch (type) { - case 1: line_buffer[i] = z[i]; break; - case 2: line_buffer[i] = z[i] - z[i-signed_stride]; break; - case 3: line_buffer[i] = z[i] - (z[i-signed_stride]>>1); break; - case 4: line_buffer[i] = (signed char) (z[i] - stbiw__paeth(0,z[i-signed_stride],0)); break; - case 5: line_buffer[i] = z[i]; break; - case 6: line_buffer[i] = z[i]; break; - } - } - switch (type) { - case 1: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - z[i-n]; break; - case 2: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - z[i-signed_stride]; break; - case 3: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - ((z[i-n] + z[i-signed_stride])>>1); break; - case 4: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - stbiw__paeth(z[i-n], z[i-signed_stride], z[i-signed_stride-n]); break; - case 5: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - (z[i-n]>>1); break; - case 6: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - stbiw__paeth(z[i-n], 0,0); break; - } -} - -STBIWDEF unsigned char *stbi_write_png_to_mem(const unsigned char *pixels, int stride_bytes, int x, int y, int n, int *out_len) -{ - int force_filter = stbi_write_force_png_filter; - int ctype[5] = { -1, 0, 4, 2, 6 }; - unsigned char sig[8] = { 137,80,78,71,13,10,26,10 }; - unsigned char *out,*o, *filt, *zlib; - signed char *line_buffer; - int j,zlen; - - if (stride_bytes == 0) - stride_bytes = x * n; - - if (force_filter >= 5) { - force_filter = -1; - } - - filt = (unsigned char *) STBIW_MALLOC((x*n+1) * y); if (!filt) return 0; - line_buffer = (signed char *) STBIW_MALLOC(x * n); if (!line_buffer) { STBIW_FREE(filt); return 0; } - for (j=0; j < y; ++j) { - int filter_type; - if (force_filter > -1) { - filter_type = force_filter; - stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, force_filter, line_buffer); - } else { // Estimate the best filter by running through all of them: - int best_filter = 0, best_filter_val = 0x7fffffff, est, i; - for (filter_type = 0; filter_type < 5; filter_type++) { - stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, filter_type, line_buffer); - - // Estimate the entropy of the line using this filter; the less, the better. - est = 0; - for (i = 0; i < x*n; ++i) { - est += abs((signed char) line_buffer[i]); - } - if (est < best_filter_val) { - best_filter_val = est; - best_filter = filter_type; - } - } - if (filter_type != best_filter) { // If the last iteration already got us the best filter, don't redo it - stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, best_filter, line_buffer); - filter_type = best_filter; - } - } - // when we get here, filter_type contains the filter type, and line_buffer contains the data - filt[j*(x*n+1)] = (unsigned char) filter_type; - STBIW_MEMMOVE(filt+j*(x*n+1)+1, line_buffer, x*n); - } - STBIW_FREE(line_buffer); - zlib = stbi_zlib_compress(filt, y*( x*n+1), &zlen, stbi_write_png_compression_level); - STBIW_FREE(filt); - if (!zlib) return 0; - - // each tag requires 12 bytes of overhead - out = (unsigned char *) STBIW_MALLOC(8 + 12+13 + 12+zlen + 12); - if (!out) return 0; - *out_len = 8 + 12+13 + 12+zlen + 12; - - o=out; - STBIW_MEMMOVE(o,sig,8); o+= 8; - stbiw__wp32(o, 13); // header length - stbiw__wptag(o, "IHDR"); - stbiw__wp32(o, x); - stbiw__wp32(o, y); - *o++ = 8; - *o++ = STBIW_UCHAR(ctype[n]); - *o++ = 0; - *o++ = 0; - *o++ = 0; - stbiw__wpcrc(&o,13); - - stbiw__wp32(o, zlen); - stbiw__wptag(o, "IDAT"); - STBIW_MEMMOVE(o, zlib, zlen); - o += zlen; - STBIW_FREE(zlib); - stbiw__wpcrc(&o, zlen); - - stbiw__wp32(o,0); - stbiw__wptag(o, "IEND"); - stbiw__wpcrc(&o,0); - - STBIW_ASSERT(o == out + *out_len); - - return out; -} - -#ifndef STBI_WRITE_NO_STDIO -STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes) -{ - FILE *f; - int len; - unsigned char *png = stbi_write_png_to_mem((const unsigned char *) data, stride_bytes, x, y, comp, &len); - if (png == NULL) return 0; - - f = stbiw__fopen(filename, "wb"); - if (!f) { STBIW_FREE(png); return 0; } - fwrite(png, 1, len, f); - fclose(f); - STBIW_FREE(png); - return 1; -} -#endif - -STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes) -{ - int len; - unsigned char *png = stbi_write_png_to_mem((const unsigned char *) data, stride_bytes, x, y, comp, &len); - if (png == NULL) return 0; - func(context, png, len); - STBIW_FREE(png); - return 1; -} - - -/* *************************************************************************** - * - * JPEG writer - * - * This is based on Jon Olick's jo_jpeg.cpp: - * public domain Simple, Minimalistic JPEG writer - http://www.jonolick.com/code.html - */ - -static const unsigned char stbiw__jpg_ZigZag[] = { 0,1,5,6,14,15,27,28,2,4,7,13,16,26,29,42,3,8,12,17,25,30,41,43,9,11,18, - 24,31,40,44,53,10,19,23,32,39,45,52,54,20,22,33,38,46,51,55,60,21,34,37,47,50,56,59,61,35,36,48,49,57,58,62,63 }; - -static void stbiw__jpg_writeBits(stbi__write_context *s, int *bitBufP, int *bitCntP, const unsigned short *bs) { - int bitBuf = *bitBufP, bitCnt = *bitCntP; - bitCnt += bs[1]; - bitBuf |= bs[0] << (24 - bitCnt); - while(bitCnt >= 8) { - unsigned char c = (bitBuf >> 16) & 255; - stbiw__putc(s, c); - if(c == 255) { - stbiw__putc(s, 0); - } - bitBuf <<= 8; - bitCnt -= 8; - } - *bitBufP = bitBuf; - *bitCntP = bitCnt; -} - -static void stbiw__jpg_DCT(float *d0p, float *d1p, float *d2p, float *d3p, float *d4p, float *d5p, float *d6p, float *d7p) { - float d0 = *d0p, d1 = *d1p, d2 = *d2p, d3 = *d3p, d4 = *d4p, d5 = *d5p, d6 = *d6p, d7 = *d7p; - float z1, z2, z3, z4, z5, z11, z13; - - float tmp0 = d0 + d7; - float tmp7 = d0 - d7; - float tmp1 = d1 + d6; - float tmp6 = d1 - d6; - float tmp2 = d2 + d5; - float tmp5 = d2 - d5; - float tmp3 = d3 + d4; - float tmp4 = d3 - d4; - - // Even part - float tmp10 = tmp0 + tmp3; // phase 2 - float tmp13 = tmp0 - tmp3; - float tmp11 = tmp1 + tmp2; - float tmp12 = tmp1 - tmp2; - - d0 = tmp10 + tmp11; // phase 3 - d4 = tmp10 - tmp11; - - z1 = (tmp12 + tmp13) * 0.707106781f; // c4 - d2 = tmp13 + z1; // phase 5 - d6 = tmp13 - z1; - - // Odd part - tmp10 = tmp4 + tmp5; // phase 2 - tmp11 = tmp5 + tmp6; - tmp12 = tmp6 + tmp7; - - // The rotator is modified from fig 4-8 to avoid extra negations. - z5 = (tmp10 - tmp12) * 0.382683433f; // c6 - z2 = tmp10 * 0.541196100f + z5; // c2-c6 - z4 = tmp12 * 1.306562965f + z5; // c2+c6 - z3 = tmp11 * 0.707106781f; // c4 - - z11 = tmp7 + z3; // phase 5 - z13 = tmp7 - z3; - - *d5p = z13 + z2; // phase 6 - *d3p = z13 - z2; - *d1p = z11 + z4; - *d7p = z11 - z4; - - *d0p = d0; *d2p = d2; *d4p = d4; *d6p = d6; -} - -static void stbiw__jpg_calcBits(int val, unsigned short bits[2]) { - int tmp1 = val < 0 ? -val : val; - val = val < 0 ? val-1 : val; - bits[1] = 1; - while(tmp1 >>= 1) { - ++bits[1]; - } - bits[0] = val & ((1<0)&&(DU[end0pos]==0); --end0pos) { - } - // end0pos = first element in reverse order !=0 - if(end0pos == 0) { - stbiw__jpg_writeBits(s, bitBuf, bitCnt, EOB); - return DU[0]; - } - for(i = 1; i <= end0pos; ++i) { - int startpos = i; - int nrzeroes; - unsigned short bits[2]; - for (; DU[i]==0 && i<=end0pos; ++i) { - } - nrzeroes = i-startpos; - if ( nrzeroes >= 16 ) { - int lng = nrzeroes>>4; - int nrmarker; - for (nrmarker=1; nrmarker <= lng; ++nrmarker) - stbiw__jpg_writeBits(s, bitBuf, bitCnt, M16zeroes); - nrzeroes &= 15; - } - stbiw__jpg_calcBits(DU[i], bits); - stbiw__jpg_writeBits(s, bitBuf, bitCnt, HTAC[(nrzeroes<<4)+bits[1]]); - stbiw__jpg_writeBits(s, bitBuf, bitCnt, bits); - } - if(end0pos != 63) { - stbiw__jpg_writeBits(s, bitBuf, bitCnt, EOB); - } - return DU[0]; -} - -static int stbi_write_jpg_core(stbi__write_context *s, int width, int height, int comp, const void* data, int quality) { - // Constants that don't pollute global namespace - static const unsigned char std_dc_luminance_nrcodes[] = {0,0,1,5,1,1,1,1,1,1,0,0,0,0,0,0,0}; - static const unsigned char std_dc_luminance_values[] = {0,1,2,3,4,5,6,7,8,9,10,11}; - static const unsigned char std_ac_luminance_nrcodes[] = {0,0,2,1,3,3,2,4,3,5,5,4,4,0,0,1,0x7d}; - static const unsigned char std_ac_luminance_values[] = { - 0x01,0x02,0x03,0x00,0x04,0x11,0x05,0x12,0x21,0x31,0x41,0x06,0x13,0x51,0x61,0x07,0x22,0x71,0x14,0x32,0x81,0x91,0xa1,0x08, - 0x23,0x42,0xb1,0xc1,0x15,0x52,0xd1,0xf0,0x24,0x33,0x62,0x72,0x82,0x09,0x0a,0x16,0x17,0x18,0x19,0x1a,0x25,0x26,0x27,0x28, - 0x29,0x2a,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x53,0x54,0x55,0x56,0x57,0x58,0x59, - 0x5a,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x83,0x84,0x85,0x86,0x87,0x88,0x89, - 0x8a,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xb2,0xb3,0xb4,0xb5,0xb6, - 0xb7,0xb8,0xb9,0xba,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xe1,0xe2, - 0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa - }; - static const unsigned char std_dc_chrominance_nrcodes[] = {0,0,3,1,1,1,1,1,1,1,1,1,0,0,0,0,0}; - static const unsigned char std_dc_chrominance_values[] = {0,1,2,3,4,5,6,7,8,9,10,11}; - static const unsigned char std_ac_chrominance_nrcodes[] = {0,0,2,1,2,4,4,3,4,7,5,4,4,0,1,2,0x77}; - static const unsigned char std_ac_chrominance_values[] = { - 0x00,0x01,0x02,0x03,0x11,0x04,0x05,0x21,0x31,0x06,0x12,0x41,0x51,0x07,0x61,0x71,0x13,0x22,0x32,0x81,0x08,0x14,0x42,0x91, - 0xa1,0xb1,0xc1,0x09,0x23,0x33,0x52,0xf0,0x15,0x62,0x72,0xd1,0x0a,0x16,0x24,0x34,0xe1,0x25,0xf1,0x17,0x18,0x19,0x1a,0x26, - 0x27,0x28,0x29,0x2a,0x35,0x36,0x37,0x38,0x39,0x3a,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x53,0x54,0x55,0x56,0x57,0x58, - 0x59,0x5a,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x82,0x83,0x84,0x85,0x86,0x87, - 0x88,0x89,0x8a,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xb2,0xb3,0xb4, - 0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda, - 0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa - }; - // Huffman tables - static const unsigned short YDC_HT[256][2] = { {0,2},{2,3},{3,3},{4,3},{5,3},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8},{510,9}}; - static const unsigned short UVDC_HT[256][2] = { {0,2},{1,2},{2,2},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8},{510,9},{1022,10},{2046,11}}; - static const unsigned short YAC_HT[256][2] = { - {10,4},{0,2},{1,2},{4,3},{11,4},{26,5},{120,7},{248,8},{1014,10},{65410,16},{65411,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {12,4},{27,5},{121,7},{502,9},{2038,11},{65412,16},{65413,16},{65414,16},{65415,16},{65416,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {28,5},{249,8},{1015,10},{4084,12},{65417,16},{65418,16},{65419,16},{65420,16},{65421,16},{65422,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {58,6},{503,9},{4085,12},{65423,16},{65424,16},{65425,16},{65426,16},{65427,16},{65428,16},{65429,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {59,6},{1016,10},{65430,16},{65431,16},{65432,16},{65433,16},{65434,16},{65435,16},{65436,16},{65437,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {122,7},{2039,11},{65438,16},{65439,16},{65440,16},{65441,16},{65442,16},{65443,16},{65444,16},{65445,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {123,7},{4086,12},{65446,16},{65447,16},{65448,16},{65449,16},{65450,16},{65451,16},{65452,16},{65453,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {250,8},{4087,12},{65454,16},{65455,16},{65456,16},{65457,16},{65458,16},{65459,16},{65460,16},{65461,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {504,9},{32704,15},{65462,16},{65463,16},{65464,16},{65465,16},{65466,16},{65467,16},{65468,16},{65469,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {505,9},{65470,16},{65471,16},{65472,16},{65473,16},{65474,16},{65475,16},{65476,16},{65477,16},{65478,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {506,9},{65479,16},{65480,16},{65481,16},{65482,16},{65483,16},{65484,16},{65485,16},{65486,16},{65487,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {1017,10},{65488,16},{65489,16},{65490,16},{65491,16},{65492,16},{65493,16},{65494,16},{65495,16},{65496,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {1018,10},{65497,16},{65498,16},{65499,16},{65500,16},{65501,16},{65502,16},{65503,16},{65504,16},{65505,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {2040,11},{65506,16},{65507,16},{65508,16},{65509,16},{65510,16},{65511,16},{65512,16},{65513,16},{65514,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {65515,16},{65516,16},{65517,16},{65518,16},{65519,16},{65520,16},{65521,16},{65522,16},{65523,16},{65524,16},{0,0},{0,0},{0,0},{0,0},{0,0}, - {2041,11},{65525,16},{65526,16},{65527,16},{65528,16},{65529,16},{65530,16},{65531,16},{65532,16},{65533,16},{65534,16},{0,0},{0,0},{0,0},{0,0},{0,0} - }; - static const unsigned short UVAC_HT[256][2] = { - {0,2},{1,2},{4,3},{10,4},{24,5},{25,5},{56,6},{120,7},{500,9},{1014,10},{4084,12},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {11,4},{57,6},{246,8},{501,9},{2038,11},{4085,12},{65416,16},{65417,16},{65418,16},{65419,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {26,5},{247,8},{1015,10},{4086,12},{32706,15},{65420,16},{65421,16},{65422,16},{65423,16},{65424,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {27,5},{248,8},{1016,10},{4087,12},{65425,16},{65426,16},{65427,16},{65428,16},{65429,16},{65430,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {58,6},{502,9},{65431,16},{65432,16},{65433,16},{65434,16},{65435,16},{65436,16},{65437,16},{65438,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {59,6},{1017,10},{65439,16},{65440,16},{65441,16},{65442,16},{65443,16},{65444,16},{65445,16},{65446,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {121,7},{2039,11},{65447,16},{65448,16},{65449,16},{65450,16},{65451,16},{65452,16},{65453,16},{65454,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {122,7},{2040,11},{65455,16},{65456,16},{65457,16},{65458,16},{65459,16},{65460,16},{65461,16},{65462,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {249,8},{65463,16},{65464,16},{65465,16},{65466,16},{65467,16},{65468,16},{65469,16},{65470,16},{65471,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {503,9},{65472,16},{65473,16},{65474,16},{65475,16},{65476,16},{65477,16},{65478,16},{65479,16},{65480,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {504,9},{65481,16},{65482,16},{65483,16},{65484,16},{65485,16},{65486,16},{65487,16},{65488,16},{65489,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {505,9},{65490,16},{65491,16},{65492,16},{65493,16},{65494,16},{65495,16},{65496,16},{65497,16},{65498,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {506,9},{65499,16},{65500,16},{65501,16},{65502,16},{65503,16},{65504,16},{65505,16},{65506,16},{65507,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {2041,11},{65508,16},{65509,16},{65510,16},{65511,16},{65512,16},{65513,16},{65514,16},{65515,16},{65516,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, - {16352,14},{65517,16},{65518,16},{65519,16},{65520,16},{65521,16},{65522,16},{65523,16},{65524,16},{65525,16},{0,0},{0,0},{0,0},{0,0},{0,0}, - {1018,10},{32707,15},{65526,16},{65527,16},{65528,16},{65529,16},{65530,16},{65531,16},{65532,16},{65533,16},{65534,16},{0,0},{0,0},{0,0},{0,0},{0,0} - }; - static const int YQT[] = {16,11,10,16,24,40,51,61,12,12,14,19,26,58,60,55,14,13,16,24,40,57,69,56,14,17,22,29,51,87,80,62,18,22, - 37,56,68,109,103,77,24,35,55,64,81,104,113,92,49,64,78,87,103,121,120,101,72,92,95,98,112,100,103,99}; - static const int UVQT[] = {17,18,24,47,99,99,99,99,18,21,26,66,99,99,99,99,24,26,56,99,99,99,99,99,47,66,99,99,99,99,99,99, - 99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99}; - static const float aasf[] = { 1.0f * 2.828427125f, 1.387039845f * 2.828427125f, 1.306562965f * 2.828427125f, 1.175875602f * 2.828427125f, - 1.0f * 2.828427125f, 0.785694958f * 2.828427125f, 0.541196100f * 2.828427125f, 0.275899379f * 2.828427125f }; - - int row, col, i, k; - float fdtbl_Y[64], fdtbl_UV[64]; - unsigned char YTable[64], UVTable[64]; - - if(!data || !width || !height || comp > 4 || comp < 1) { - return 0; - } - - quality = quality ? quality : 90; - quality = quality < 1 ? 1 : quality > 100 ? 100 : quality; - quality = quality < 50 ? 5000 / quality : 200 - quality * 2; - - for(i = 0; i < 64; ++i) { - int uvti, yti = (YQT[i]*quality+50)/100; - YTable[stbiw__jpg_ZigZag[i]] = (unsigned char) (yti < 1 ? 1 : yti > 255 ? 255 : yti); - uvti = (UVQT[i]*quality+50)/100; - UVTable[stbiw__jpg_ZigZag[i]] = (unsigned char) (uvti < 1 ? 1 : uvti > 255 ? 255 : uvti); - } - - for(row = 0, k = 0; row < 8; ++row) { - for(col = 0; col < 8; ++col, ++k) { - fdtbl_Y[k] = 1 / (YTable [stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col]); - fdtbl_UV[k] = 1 / (UVTable[stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col]); - } - } - - // Write Headers - { - static const unsigned char head0[] = { 0xFF,0xD8,0xFF,0xE0,0,0x10,'J','F','I','F',0,1,1,0,0,1,0,1,0,0,0xFF,0xDB,0,0x84,0 }; - static const unsigned char head2[] = { 0xFF,0xDA,0,0xC,3,1,0,2,0x11,3,0x11,0,0x3F,0 }; - const unsigned char head1[] = { 0xFF,0xC0,0,0x11,8,(unsigned char)(height>>8),STBIW_UCHAR(height),(unsigned char)(width>>8),STBIW_UCHAR(width), - 3,1,0x11,0,2,0x11,1,3,0x11,1,0xFF,0xC4,0x01,0xA2,0 }; - s->func(s->context, (void*)head0, sizeof(head0)); - s->func(s->context, (void*)YTable, sizeof(YTable)); - stbiw__putc(s, 1); - s->func(s->context, UVTable, sizeof(UVTable)); - s->func(s->context, (void*)head1, sizeof(head1)); - s->func(s->context, (void*)(std_dc_luminance_nrcodes+1), sizeof(std_dc_luminance_nrcodes)-1); - s->func(s->context, (void*)std_dc_luminance_values, sizeof(std_dc_luminance_values)); - stbiw__putc(s, 0x10); // HTYACinfo - s->func(s->context, (void*)(std_ac_luminance_nrcodes+1), sizeof(std_ac_luminance_nrcodes)-1); - s->func(s->context, (void*)std_ac_luminance_values, sizeof(std_ac_luminance_values)); - stbiw__putc(s, 1); // HTUDCinfo - s->func(s->context, (void*)(std_dc_chrominance_nrcodes+1), sizeof(std_dc_chrominance_nrcodes)-1); - s->func(s->context, (void*)std_dc_chrominance_values, sizeof(std_dc_chrominance_values)); - stbiw__putc(s, 0x11); // HTUACinfo - s->func(s->context, (void*)(std_ac_chrominance_nrcodes+1), sizeof(std_ac_chrominance_nrcodes)-1); - s->func(s->context, (void*)std_ac_chrominance_values, sizeof(std_ac_chrominance_values)); - s->func(s->context, (void*)head2, sizeof(head2)); - } - - // Encode 8x8 macroblocks - { - static const unsigned short fillBits[] = {0x7F, 7}; - const unsigned char *imageData = (const unsigned char *)data; - int DCY=0, DCU=0, DCV=0; - int bitBuf=0, bitCnt=0; - // comp == 2 is grey+alpha (alpha is ignored) - int ofsG = comp > 2 ? 1 : 0, ofsB = comp > 2 ? 2 : 0; - int x, y, pos; - for(y = 0; y < height; y += 8) { - for(x = 0; x < width; x += 8) { - float YDU[64], UDU[64], VDU[64]; - for(row = y, pos = 0; row < y+8; ++row) { - // row >= height => use last input row - int clamped_row = (row < height) ? row : height - 1; - int base_p = (stbi__flip_vertically_on_write ? (height-1-clamped_row) : clamped_row)*width*comp; - for(col = x; col < x+8; ++col, ++pos) { - float r, g, b; - // if col >= width => use pixel from last input column - int p = base_p + ((col < width) ? col : (width-1))*comp; - - r = imageData[p+0]; - g = imageData[p+ofsG]; - b = imageData[p+ofsB]; - YDU[pos]=+0.29900f*r+0.58700f*g+0.11400f*b-128; - UDU[pos]=-0.16874f*r-0.33126f*g+0.50000f*b; - VDU[pos]=+0.50000f*r-0.41869f*g-0.08131f*b; - } - } - - DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, YDU, fdtbl_Y, DCY, YDC_HT, YAC_HT); - DCU = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, UDU, fdtbl_UV, DCU, UVDC_HT, UVAC_HT); - DCV = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, VDU, fdtbl_UV, DCV, UVDC_HT, UVAC_HT); - } - } - - // Do the bit alignment of the EOI marker - stbiw__jpg_writeBits(s, &bitBuf, &bitCnt, fillBits); - } - - // EOI - stbiw__putc(s, 0xFF); - stbiw__putc(s, 0xD9); - - return 1; -} - -STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality) -{ - stbi__write_context s; - stbi__start_write_callbacks(&s, func, context); - return stbi_write_jpg_core(&s, x, y, comp, (void *) data, quality); -} - - -#ifndef STBI_WRITE_NO_STDIO -STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality) -{ - stbi__write_context s; - if (stbi__start_write_file(&s,filename)) { - int r = stbi_write_jpg_core(&s, x, y, comp, data, quality); - stbi__end_write_file(&s); - return r; - } else - return 0; -} -#endif - -#endif // STB_IMAGE_WRITE_IMPLEMENTATION - -/* Revision history - 1.10 (2019-02-07) - support utf8 filenames in Windows; fix warnings and platform ifdefs - 1.09 (2018-02-11) - fix typo in zlib quality API, improve STB_I_W_STATIC in C++ - 1.08 (2018-01-29) - add stbi__flip_vertically_on_write, external zlib, zlib quality, choose PNG filter - 1.07 (2017-07-24) - doc fix - 1.06 (2017-07-23) - writing JPEG (using Jon Olick's code) - 1.05 ??? - 1.04 (2017-03-03) - monochrome BMP expansion - 1.03 ??? - 1.02 (2016-04-02) - avoid allocating large structures on the stack - 1.01 (2016-01-16) - STBIW_REALLOC_SIZED: support allocators with no realloc support - avoid race-condition in crc initialization - minor compile issues - 1.00 (2015-09-14) - installable file IO function - 0.99 (2015-09-13) - warning fixes; TGA rle support - 0.98 (2015-04-08) - added STBIW_MALLOC, STBIW_ASSERT etc - 0.97 (2015-01-18) - fixed HDR asserts, rewrote HDR rle logic - 0.96 (2015-01-17) - add HDR output - fix monochrome BMP - 0.95 (2014-08-17) - add monochrome TGA output - 0.94 (2014-05-31) - rename private functions to avoid conflicts with stb_image.h - 0.93 (2014-05-27) - warning fixes - 0.92 (2010-08-01) - casts to unsigned char to fix warnings - 0.91 (2010-07-17) - first public release - 0.90 first internal 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/orochi_recipe/CMakeLists.txt b/orochi_recipe/CMakeLists.txt new file mode 100644 index 0000000..c4ab8c3 --- /dev/null +++ b/orochi_recipe/CMakeLists.txt @@ -0,0 +1,18 @@ + + +cmake_minimum_required(VERSION 3.0.0) +project(cmake_wrapper) + +include(conanbuildinfo.cmake) +conan_basic_setup() + +message(${CMAKE_SOURCE_DIR}) + +add_library(orochi STATIC source_subfolder/Orochi/Orochi.cpp source_subfolder/Orochi/OrochiUtils.cpp source_subfolder/contrib/cuew/src/cuew.cpp source_subfolder/contrib/hipew/src/hipew.cpp) +target_include_directories(orochi PUBLIC ${CMAKE_SOURCE_DIR}/source_subfolder) + +install(TARGETS orochi DESTINATION lib) +install ( + DIRECTORY ${CMAKE_SOURCE_DIR}/source_subfolder/Orochi + DESTINATION include + FILES_MATCHING PATTERN "*.h*") \ No newline at end of file diff --git a/orochi_recipe/conandata.yml b/orochi_recipe/conandata.yml new file mode 100644 index 0000000..52ce1c1 --- /dev/null +++ b/orochi_recipe/conandata.yml @@ -0,0 +1,7 @@ +sources: + "0.00": + sha256: 361d0e66f64ea4d24e3fb5ea3a5adab9bb0ace9bd4b188ec6c025a4272ac84eb + url: https://github.com/GPUOpen-LibrariesAndSDKs/Orochi/archive/refs/tags/v0.00.tar.gz + "1.00": + sha256: 2DDE75B4FE54B226D3EA0B1D5EDC4E73783F541FABC3B985D1057054541CEB5D + url: https://github.com/GPUOpen-LibrariesAndSDKs/Orochi/archive/refs/tags/v1.00.tar.gz \ No newline at end of file diff --git a/orochi_recipe/conanfile.py b/orochi_recipe/conanfile.py new file mode 100644 index 0000000..71c0c07 --- /dev/null +++ b/orochi_recipe/conanfile.py @@ -0,0 +1,71 @@ +from conans import ConanFile, CMake, tools + +required_conan_version = ">=1.43.0" + + +class OrochiConan(ConanFile): + name = "orochi" + homepage = "https://github.com/GPUOpen-LibrariesAndSDKs/Orochi" + url = "https://github.com/GPUOpen-LibrariesAndSDKs/Orochi.git" + + description = "Orochi is a library loading HIP and CUDA APIs dynamically, allowing the user to switch APIs at runtime." + license = "MIT" + + settings = "os", "arch", "compiler", "build_type" + + exports_sources = "CMakeLists.txt" + + generators = "cmake", "cmake_find_package" + + version = "1.00" + + @property + def _source_subfolder(self): + return "source_subfolder" + + @property + def _build_subfolder(self): + return "build_subfolder" + + def source(self): + + if self.version == "latest": + git = tools.Git(folder=self._source_subfolder) + git.clone(self.url, "main") + else: + tools.get( + **self.conan_data["sources"][self.version], + destination=self._source_subfolder, + strip_root=True + ) + + def build(self): + cmake = CMake(self) + cmake.configure(build_folder=self._build_subfolder) + cmake.build() + + def package(self): + self.copy(pattern="LICENSE*", src=self._source_subfolder, dst="licenses") + + cmake = CMake(self) + cmake.configure(build_folder=self._build_subfolder) + cmake.install() + + self.copy( + pattern="*.dll", + src=self._source_subfolder + "/contrib/bin/win64", + dst="bin", + ) + + def package_info(self): + self.cpp_info.names["cmake_find_package"] = "orochi" + self.cpp_info.names["cmake_find_package_multi"] = "orochi" + self.cpp_info.names["pkg_config"] = "orochi" + + self.cpp_info.libs = ["orochi"] + + if self.settings.os in ["Linux", "FreeBSD"]: + self.cpp_info.system_libs.extend(["dl", "m", "pthread"]) + + if self.settings.os == "Windows": + self.cpp_info.system_libs.extend(["version"]) diff --git a/orochi_recipe/test_package/CMakeLists.txt b/orochi_recipe/test_package/CMakeLists.txt new file mode 100644 index 0000000..c59ffea --- /dev/null +++ b/orochi_recipe/test_package/CMakeLists.txt @@ -0,0 +1,11 @@ + +cmake_minimum_required(VERSION 3.1) +project(test_package) + +include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake) +conan_basic_setup(TARGETS) + +find_package(orochi REQUIRED CONFIG) + +add_executable(${PROJECT_NAME} test_package.cpp) +target_link_libraries(${PROJECT_NAME} orochi::orochi) \ No newline at end of file diff --git a/orochi_recipe/test_package/conanfile.py b/orochi_recipe/test_package/conanfile.py new file mode 100644 index 0000000..f6c0d75 --- /dev/null +++ b/orochi_recipe/test_package/conanfile.py @@ -0,0 +1,20 @@ +from conans import ConanFile, CMake, tools +import os + + +class TestPackageConan(ConanFile): + settings = "os", "arch", "compiler", "build_type" + generators = "cmake", "cmake_find_package_multi" + + def build(self): + cmake = CMake(self) + cmake.configure() + cmake.build() + + def imports(self): + self.copy("*.dll", "", "bin") + + def test(self): + if not tools.cross_building(self): + bin_path = os.path.join("bin", "test_package") + self.run(bin_path, run_environment=True) diff --git a/orochi_recipe/test_package/test_package.cpp b/orochi_recipe/test_package/test_package.cpp new file mode 100644 index 0000000..a086e3b --- /dev/null +++ b/orochi_recipe/test_package/test_package.cpp @@ -0,0 +1,122 @@ + + +#include +#include +#include +#include +#include +#include + +inline +oroApi getApiType( int argc, char** argv ) +{ + oroApi api = ORO_API_HIP; + if( argc >= 2 ) + { + if( strcmp( argv[1], "hip" ) == 0 ) + api = ORO_API_HIP; + if( strcmp( argv[1], "cuda" ) == 0 ) + api = ORO_API_CUDA; + } + return api; +} + +inline void checkError( oroError e ) +{ + const char* pStr; + oroGetErrorString( e, &pStr ); + if( e != oroSuccess ) + printf( "ERROR==================\n%s\n", pStr); +} + +#define ERROR_CHECK( e ) checkError( e ) + +int main(int argc, char** argv ) +{ + oroApi api = getApiType( argc, argv ); + + int a = oroInitialize( api, 0 ); + if( a != 0 ) + { + printf("initialization failed\n"); + return 0; + } + printf( ">> executing on %s\n", ( api == ORO_API_HIP )? "hip":"cuda" ); + + printf(">> testing initialization\n"); + oroError e; + e = oroInit( 0 ); + oroDevice device; + e = oroDeviceGet( &device, 0 ); + oroCtx ctx; + e = oroCtxCreate( &ctx, 0, device ); + + printf(">> testing device props\n"); + { + oroDeviceProp props; + oroGetDeviceProperties( &props, device ); + printf("executing on %s (%s)\n", props.name, props.gcnArchName ); + } + printf(">> testing kernel execution\n"); + { + oroFunction function; + { + const char* code = "extern \"C\" __global__ " + "void testKernel()" + "{ int a = threadIdx.x; }"; + const char* funcName = "testKernel"; + orortcProgram prog; + orortcResult e; + e = orortcCreateProgram( &prog, code, funcName, 0, 0, 0 ); + std::vector opts; + opts.push_back( "-I ../" ); + + e = orortcCompileProgram( prog, opts.size(), opts.data() ); + if( e != ORORTC_SUCCESS ) + { + size_t logSize; + orortcGetProgramLogSize(prog, &logSize); + if (logSize) + { + std::string log(logSize, '\0'); + orortcGetProgramLog(prog, &log[0]); + std::cout << log << '\n'; + }; + } + size_t codeSize; + e = orortcGetCodeSize(prog, &codeSize); + + std::vector codec(codeSize); + e = orortcGetCode(prog, codec.data()); + e = orortcDestroyProgram(&prog); + oroModule module; + oroError ee = oroModuleLoadData(&module, codec.data()); + ee = oroModuleGetFunction(&function, module, funcName); + } + + oroStream stream; + oroStreamCreate( &stream ); + + oroEvent start, stop; + oroEventCreateWithFlags( &start, 0 ); + oroEventCreateWithFlags( &stop, 0 ); + oroEventRecord( start, stream ); + + void** args = {}; + oroError e = oroModuleLaunchKernel( function, 1,1,1, 32,1,1, 0, stream, args, 0 ); + + oroEventRecord( stop, stream ); + + oroDeviceSynchronize(); + + oroStreamDestroy( stream ); + + float milliseconds = 0.0f; + oroEventElapsedTime( &milliseconds, start, stop ); + printf( ">> kernel - %.5f ms\n", milliseconds ); + oroEventDestroy( start ); + oroEventDestroy( stop ); + } + printf(">> done\n"); + return 0; +} \ No newline at end of file diff --git a/tutorials/common/TestBase.cpp b/tutorials/common/TestBase.cpp index 6ad3215..832038d 100644 --- a/tutorials/common/TestBase.cpp +++ b/tutorials/common/TestBase.cpp @@ -23,9 +23,9 @@ #include #define STB_IMAGE_WRITE_IMPLEMENTATION -#include +#include #define TINYOBJLOADER_IMPLEMENTATION -#include "../common/tiny_obj_loader.h" +#include #include #include @@ -110,18 +110,12 @@ hiprtError TestBase::createScene( std::vector shapes; std::vector materials; std::string err; - std::string warning; - bool ret = tinyobj::LoadObj( &attrib, &shapes, &materials, &warning, &err, fileName.c_str(), mtlBaseDir.c_str() ); - - if ( !warning.empty() ) - { - std::cout << "OBJ Loader WARN : " << warning << '\n'; - } + const bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &err, fileName.c_str(), mtlBaseDir.c_str()); if ( !err.empty() ) { - std::cout << "OBJ Loader ERROR : " << err << '\n'; + std::cout << "Failed to load obj file" << std::endl; } if ( !ret ) diff --git a/tutorials/common/dependency.lua b/tutorials/common/dependency.lua index 1017d1d..01689dd 100644 --- a/tutorials/common/dependency.lua +++ b/tutorials/common/dependency.lua @@ -1,6 +1,4 @@ -includedirs { "../../contrib/Orochi/" } -files {"../../contrib/Orochi/Orochi/**.h", "../../contrib/Orochi/Orochi/**.cpp"} -files {"../../contrib/Orochi/contrib/**.h", "../../contrib/Orochi/contrib/**.cpp"} + if os.istarget("windows") then links{ "version" } diff --git a/tutorials/common/tiny_obj_loader.h b/tutorials/common/tiny_obj_loader.h deleted file mode 100644 index 7fa95c9..0000000 --- a/tutorials/common/tiny_obj_loader.h +++ /dev/null @@ -1,3012 +0,0 @@ -/* -The MIT License (MIT) - -Copyright (c) 2012-2018 Syoyo Fujita and many contributors. - -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. -*/ - -// -// version 2.0.0 : Add new object oriented API. 1.x API is still provided. -// * Support line primitive. -// * Support points primitive. -// * Support multiple search path for .mtl(v1 API). -// version 1.4.0 : Modifed ParseTextureNameAndOption API -// version 1.3.1 : Make ParseTextureNameAndOption API public -// version 1.3.0 : Separate warning and error message(breaking API of LoadObj) -// version 1.2.3 : Added color space extension('-colorspace') to tex opts. -// version 1.2.2 : Parse multiple group names. -// version 1.2.1 : Added initial support for line('l') primitive(PR #178) -// version 1.2.0 : Hardened implementation(#175) -// version 1.1.1 : Support smoothing groups(#162) -// version 1.1.0 : Support parsing vertex color(#144) -// version 1.0.8 : Fix parsing `g` tag just after `usemtl`(#138) -// version 1.0.7 : Support multiple tex options(#126) -// version 1.0.6 : Add TINYOBJLOADER_USE_DOUBLE option(#124) -// version 1.0.5 : Ignore `Tr` when `d` exists in MTL(#43) -// version 1.0.4 : Support multiple filenames for 'mtllib'(#112) -// version 1.0.3 : Support parsing texture options(#85) -// version 1.0.2 : Improve parsing speed by about a factor of 2 for large -// files(#105) -// version 1.0.1 : Fixes a shape is lost if obj ends with a 'usemtl'(#104) -// version 1.0.0 : Change data structure. Change license from BSD to MIT. -// - -// -// Use this in *one* .cc -// #define TINYOBJLOADER_IMPLEMENTATION -// #include "tiny_obj_loader.h" -// - -#ifndef TINY_OBJ_LOADER_H_ -#define TINY_OBJ_LOADER_H_ - -#include -#include -#include - -namespace tinyobj { - -// TODO(syoyo): Better C++11 detection for older compiler -#if __cplusplus > 199711L -#define TINYOBJ_OVERRIDE override -#else -#define TINYOBJ_OVERRIDE -#endif - -#ifdef __clang__ -#pragma clang diagnostic push -#if __has_warning("-Wzero-as-null-pointer-constant") -#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant" -#endif - -#pragma clang diagnostic ignored "-Wpadded" - -#endif - -// https://en.wikipedia.org/wiki/Wavefront_.obj_file says ... -// -// -blendu on | off # set horizontal texture blending -// (default on) -// -blendv on | off # set vertical texture blending -// (default on) -// -boost real_value # boost mip-map sharpness -// -mm base_value gain_value # modify texture map values (default -// 0 1) -// # base_value = brightness, -// gain_value = contrast -// -o u [v [w]] # Origin offset (default -// 0 0 0) -// -s u [v [w]] # Scale (default -// 1 1 1) -// -t u [v [w]] # Turbulence (default -// 0 0 0) -// -texres resolution # texture resolution to create -// -clamp on | off # only render texels in the clamped -// 0-1 range (default off) -// # When unclamped, textures are -// repeated across a surface, -// # when clamped, only texels which -// fall within the 0-1 -// # range are rendered. -// -bm mult_value # bump multiplier (for bump maps -// only) -// -// -imfchan r | g | b | m | l | z # specifies which channel of the file -// is used to -// # create a scalar or bump texture. -// r:red, g:green, -// # b:blue, m:matte, l:luminance, -// z:z-depth.. -// # (the default for bump is 'l' and -// for decal is 'm') -// bump -imfchan r bumpmap.tga # says to use the red channel of -// bumpmap.tga as the bumpmap -// -// For reflection maps... -// -// -type sphere # specifies a sphere for a "refl" -// reflection map -// -type cube_top | cube_bottom | # when using a cube map, the texture -// file for each -// cube_front | cube_back | # side of the cube is specified -// separately -// cube_left | cube_right -// -// TinyObjLoader extension. -// -// -colorspace SPACE # Color space of the texture. e.g. -// 'sRGB` or 'linear' -// - -#ifdef TINYOBJLOADER_USE_DOUBLE -//#pragma message "using double" -typedef double real_t; -#else -//#pragma message "using float" -typedef float real_t; -#endif - -typedef enum { - TEXTURE_TYPE_NONE, // default - TEXTURE_TYPE_SPHERE, - TEXTURE_TYPE_CUBE_TOP, - TEXTURE_TYPE_CUBE_BOTTOM, - TEXTURE_TYPE_CUBE_FRONT, - TEXTURE_TYPE_CUBE_BACK, - TEXTURE_TYPE_CUBE_LEFT, - TEXTURE_TYPE_CUBE_RIGHT -} texture_type_t; - -struct texture_option_t { - texture_type_t type; // -type (default TEXTURE_TYPE_NONE) - real_t sharpness; // -boost (default 1.0?) - real_t brightness; // base_value in -mm option (default 0) - real_t contrast; // gain_value in -mm option (default 1) - real_t origin_offset[3]; // -o u [v [w]] (default 0 0 0) - real_t scale[3]; // -s u [v [w]] (default 1 1 1) - real_t turbulence[3]; // -t u [v [w]] (default 0 0 0) - int texture_resolution; // -texres resolution (No default value in the spec. We'll use -1) - bool clamp; // -clamp (default false) - char imfchan; // -imfchan (the default for bump is 'l' and for decal is 'm') - bool blendu; // -blendu (default on) - bool blendv; // -blendv (default on) - real_t bump_multiplier; // -bm (for bump maps only, default 1.0) - - // extension - std::string colorspace; // Explicitly specify color space of stored texel - // value. Usually `sRGB` or `linear` (default empty). -}; - -struct material_t { - std::string name; - - real_t ambient[3]; - real_t diffuse[3]; - real_t specular[3]; - real_t transmittance[3]; - real_t emission[3]; - real_t shininess; - real_t ior; // index of refraction - real_t dissolve; // 1 == opaque; 0 == fully transparent - // illumination model (see http://www.fileformat.info/format/material/) - int illum; - - int dummy; // Suppress padding warning. - - std::string ambient_texname; // map_Ka - std::string diffuse_texname; // map_Kd - std::string specular_texname; // map_Ks - std::string specular_highlight_texname; // map_Ns - std::string bump_texname; // map_bump, map_Bump, bump - std::string displacement_texname; // disp - std::string alpha_texname; // map_d - std::string reflection_texname; // refl - - texture_option_t ambient_texopt; - texture_option_t diffuse_texopt; - texture_option_t specular_texopt; - texture_option_t specular_highlight_texopt; - texture_option_t bump_texopt; - texture_option_t displacement_texopt; - texture_option_t alpha_texopt; - texture_option_t reflection_texopt; - - // PBR extension - // http://exocortex.com/blog/extending_wavefront_mtl_to_support_pbr - real_t roughness; // [0, 1] default 0 - real_t metallic; // [0, 1] default 0 - real_t sheen; // [0, 1] default 0 - real_t clearcoat_thickness; // [0, 1] default 0 - real_t clearcoat_roughness; // [0, 1] default 0 - real_t anisotropy; // aniso. [0, 1] default 0 - real_t anisotropy_rotation; // anisor. [0, 1] default 0 - real_t pad0; - std::string roughness_texname; // map_Pr - std::string metallic_texname; // map_Pm - std::string sheen_texname; // map_Ps - std::string emissive_texname; // map_Ke - std::string normal_texname; // norm. For normal mapping. - - texture_option_t roughness_texopt; - texture_option_t metallic_texopt; - texture_option_t sheen_texopt; - texture_option_t emissive_texopt; - texture_option_t normal_texopt; - - int pad2; - - std::map unknown_parameter; - -#ifdef TINY_OBJ_LOADER_PYTHON_BINDING - // For pybind11 - std::array GetDiffuse() { - std::array values; - values[0] = double(diffuse[0]); - values[1] = double(diffuse[1]); - values[2] = double(diffuse[2]); - - return values; - } - - std::array GetSpecular() { - std::array values; - values[0] = double(specular[0]); - values[1] = double(specular[1]); - values[2] = double(specular[2]); - - return values; - } - - std::array GetTransmittance() { - std::array values; - values[0] = double(transmittance[0]); - values[1] = double(transmittance[1]); - values[2] = double(transmittance[2]); - - return values; - } - - std::array GetEmission() { - std::array values; - values[0] = double(emission[0]); - values[1] = double(emission[1]); - values[2] = double(emission[2]); - - return values; - } - - std::array GetAmbient() { - std::array values; - values[0] = double(ambient[0]); - values[1] = double(ambient[1]); - values[2] = double(ambient[2]); - - return values; - } - - void SetDiffuse(std::array &a) { - diffuse[0] = real_t(a[0]); - diffuse[1] = real_t(a[1]); - diffuse[2] = real_t(a[2]); - } - - void SetAmbient(std::array &a) { - ambient[0] = real_t(a[0]); - ambient[1] = real_t(a[1]); - ambient[2] = real_t(a[2]); - } - - void SetSpecular(std::array &a) { - specular[0] = real_t(a[0]); - specular[1] = real_t(a[1]); - specular[2] = real_t(a[2]); - } - - void SetTransmittance(std::array &a) { - transmittance[0] = real_t(a[0]); - transmittance[1] = real_t(a[1]); - transmittance[2] = real_t(a[2]); - } - - std::string GetCustomParameter(const std::string &key) { - std::map::const_iterator it = - unknown_parameter.find(key); - - if (it != unknown_parameter.end()) { - return it->second; - } - return std::string(); - } - -#endif - -}; - -struct tag_t { - std::string name; - - std::vector intValues; - std::vector floatValues; - std::vector stringValues; -}; - -// Index struct to support different indices for vtx/normal/texcoord. -// -1 means not used. -struct index_t { - int vertex_index; - int normal_index; - int texcoord_index; -}; - -struct mesh_t { - std::vector indices; - std::vector - num_face_vertices; // The number of vertices per - // face. 3 = triangle, 4 = quad, - // ... Up to 255 vertices per face. - std::vector material_ids; // per-face material ID - std::vector smoothing_group_ids; // per-face smoothing group - // ID(0 = off. positive value - // = group id) - std::vector tags; // SubD tag -}; - -// struct path_t { -// std::vector indices; // pairs of indices for lines -//}; - -struct lines_t { - // Linear flattened indices. - std::vector indices; // indices for vertices(poly lines) - std::vector num_line_vertices; // The number of vertices per line. -}; - -struct points_t { - std::vector indices; // indices for points -}; - -struct shape_t { - std::string name; - mesh_t mesh; - lines_t lines; - points_t points; -}; - -// Vertex attributes -struct attrib_t { - std::vector vertices; // 'v'(xyz) - - // For backward compatibility, we store vertex weight in separate array. - std::vector vertex_weights; // 'v'(w) - std::vector normals; // 'vn' - std::vector texcoords; // 'vt'(uv) - - // For backward compatibility, we store texture coordinate 'w' in separate - // array. - std::vector texcoord_ws; // 'vt'(w) - std::vector colors; // extension: vertex colors - - attrib_t() {} - - // - // For pybind11 - // - const std::vector &GetVertices() const { return vertices; } - - const std::vector &GetVertexWeights() const { return vertex_weights; } -}; - -struct callback_t { - // W is optional and set to 1 if there is no `w` item in `v` line - void (*vertex_cb)(void *user_data, real_t x, real_t y, real_t z, real_t w); - void (*normal_cb)(void *user_data, real_t x, real_t y, real_t z); - - // y and z are optional and set to 0 if there is no `y` and/or `z` item(s) in - // `vt` line. - void (*texcoord_cb)(void *user_data, real_t x, real_t y, real_t z); - - // called per 'f' line. num_indices is the number of face indices(e.g. 3 for - // triangle, 4 for quad) - // 0 will be passed for undefined index in index_t members. - void (*index_cb)(void *user_data, index_t *indices, int num_indices); - // `name` material name, `material_id` = the array index of material_t[]. -1 - // if - // a material not found in .mtl - void (*usemtl_cb)(void *user_data, const char *name, int material_id); - // `materials` = parsed material data. - void (*mtllib_cb)(void *user_data, const material_t *materials, - int num_materials); - // There may be multiple group names - void (*group_cb)(void *user_data, const char **names, int num_names); - void (*object_cb)(void *user_data, const char *name); - - callback_t() - : vertex_cb(NULL), - normal_cb(NULL), - texcoord_cb(NULL), - index_cb(NULL), - usemtl_cb(NULL), - mtllib_cb(NULL), - group_cb(NULL), - object_cb(NULL) {} -}; - -class MaterialReader { - public: - MaterialReader() {} - virtual ~MaterialReader(); - - virtual bool operator()(const std::string &matId, - std::vector *materials, - std::map *matMap, std::string *warn, - std::string *err) = 0; -}; - -/// -/// Read .mtl from a file. -/// -class MaterialFileReader : public MaterialReader { - public: - // Path could contain separator(';' in Windows, ':' in Posix) - explicit MaterialFileReader(const std::string &mtl_basedir) - : m_mtlBaseDir(mtl_basedir) {} - virtual ~MaterialFileReader() TINYOBJ_OVERRIDE {} - virtual bool operator()(const std::string &matId, - std::vector *materials, - std::map *matMap, std::string *warn, - std::string *err) TINYOBJ_OVERRIDE; - - private: - std::string m_mtlBaseDir; -}; - -/// -/// Read .mtl from a stream. -/// -class MaterialStreamReader : public MaterialReader { - public: - explicit MaterialStreamReader(std::istream &inStream) - : m_inStream(inStream) {} - virtual ~MaterialStreamReader() TINYOBJ_OVERRIDE {} - virtual bool operator()(const std::string &matId, - std::vector *materials, - std::map *matMap, std::string *warn, - std::string *err) TINYOBJ_OVERRIDE; - - private: - std::istream &m_inStream; -}; - -// v2 API -struct ObjReaderConfig { - bool triangulate; // triangulate polygon? - - /// Parse vertex color. - /// If vertex color is not present, its filled with default value. - /// false = no vertex color - /// This will increase memory of parsed .obj - bool vertex_color; - - /// - /// Search path to .mtl file. - /// Default = "" = search from the same directory of .obj file. - /// Valid only when loading .obj from a file. - /// - std::string mtl_search_path; - - ObjReaderConfig() : triangulate(true), vertex_color(true) {} -}; - -/// -/// Wavefront .obj reader class(v2 API) -/// -class ObjReader { - public: - ObjReader() : valid_(false) {} - ~ObjReader() {} - - /// - /// Load .obj and .mtl from a file. - /// - /// @param[in] filename wavefront .obj filename - /// @param[in] config Reader configuration - /// - bool ParseFromFile(const std::string &filename, - const ObjReaderConfig &config = ObjReaderConfig()); - - /// - /// Parse .obj from a text string. - /// Need to supply .mtl text string by `mtl_text`. - /// This function ignores `mtllib` line in .obj text. - /// - /// @param[in] obj_text wavefront .obj filename - /// @param[in] mtl_text wavefront .mtl filename - /// @param[in] config Reader configuration - /// - bool ParseFromString(const std::string &obj_text, const std::string &mtl_text, - const ObjReaderConfig &config = ObjReaderConfig()); - - /// - /// .obj was loaded or parsed correctly. - /// - bool Valid() const { return valid_; } - - const attrib_t &GetAttrib() const { return attrib_; } - - const std::vector &GetShapes() const { return shapes_; } - - const std::vector &GetMaterials() const { return materials_; } - - /// - /// Warning message(may be filled after `Load` or `Parse`) - /// - const std::string &Warning() const { return warning_; } - - /// - /// Error message(filled when `Load` or `Parse` failed) - /// - const std::string &Error() const { return error_; } - - private: - bool valid_; - - attrib_t attrib_; - std::vector shapes_; - std::vector materials_; - - std::string warning_; - std::string error_; -}; - -/// ==>>========= Legacy v1 API ============================================= - -/// Loads .obj from a file. -/// 'attrib', 'shapes' and 'materials' will be filled with parsed shape data -/// 'shapes' will be filled with parsed shape data -/// Returns true when loading .obj become success. -/// Returns warning message into `warn`, and error message into `err` -/// 'mtl_basedir' is optional, and used for base directory for .mtl file. -/// In default(`NULL'), .mtl file is searched from an application's working -/// directory. -/// 'triangulate' is optional, and used whether triangulate polygon face in .obj -/// or not. -/// Option 'default_vcols_fallback' specifies whether vertex colors should -/// always be defined, even if no colors are given (fallback to white). -bool LoadObj(attrib_t *attrib, std::vector *shapes, - std::vector *materials, std::string *warn, - std::string *err, const char *filename, - const char *mtl_basedir = NULL, bool triangulate = true, - bool default_vcols_fallback = true); - -/// Loads .obj from a file with custom user callback. -/// .mtl is loaded as usual and parsed material_t data will be passed to -/// `callback.mtllib_cb`. -/// Returns true when loading .obj/.mtl become success. -/// Returns warning message into `warn`, and error message into `err` -/// See `examples/callback_api/` for how to use this function. -bool LoadObjWithCallback(std::istream &inStream, const callback_t &callback, - void *user_data = NULL, - MaterialReader *readMatFn = NULL, - std::string *warn = NULL, std::string *err = NULL); - -/// Loads object from a std::istream, uses `readMatFn` to retrieve -/// std::istream for materials. -/// Returns true when loading .obj become success. -/// Returns warning and error message into `err` -bool LoadObj(attrib_t *attrib, std::vector *shapes, - std::vector *materials, std::string *warn, - std::string *err, std::istream *inStream, - MaterialReader *readMatFn = NULL, bool triangulate = true, - bool default_vcols_fallback = true); - -/// Loads materials into std::map -void LoadMtl(std::map *material_map, - std::vector *materials, std::istream *inStream, - std::string *warning, std::string *err); - -/// -/// Parse texture name and texture option for custom texture parameter through -/// material::unknown_parameter -/// -/// @param[out] texname Parsed texture name -/// @param[out] texopt Parsed texopt -/// @param[in] linebuf Input string -/// -bool ParseTextureNameAndOption(std::string *texname, texture_option_t *texopt, - const char *linebuf); - -/// =<<========== Legacy v1 API ============================================= - -} // namespace tinyobj - -#endif // TINY_OBJ_LOADER_H_ - -#ifdef TINYOBJLOADER_IMPLEMENTATION -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -namespace tinyobj { - -MaterialReader::~MaterialReader() {} - -struct vertex_index_t { - int v_idx, vt_idx, vn_idx; - vertex_index_t() : v_idx(-1), vt_idx(-1), vn_idx(-1) {} - explicit vertex_index_t(int idx) : v_idx(idx), vt_idx(idx), vn_idx(idx) {} - vertex_index_t(int vidx, int vtidx, int vnidx) - : v_idx(vidx), vt_idx(vtidx), vn_idx(vnidx) {} -}; - -// Internal data structure for face representation -// index + smoothing group. -struct face_t { - unsigned int - smoothing_group_id; // smoothing group id. 0 = smoothing groupd is off. - int pad_; - std::vector vertex_indices; // face vertex indices. - - face_t() : smoothing_group_id(0), pad_(0) {} -}; - -// Internal data structure for line representation -struct __line_t { - // l v1/vt1 v2/vt2 ... - // In the specification, line primitrive does not have normal index, but - // TinyObjLoader allow it - std::vector vertex_indices; -}; - -// Internal data structure for points representation -struct __points_t { - // p v1 v2 ... - // In the specification, point primitrive does not have normal index and - // texture coord index, but TinyObjLoader allow it. - std::vector vertex_indices; -}; - -struct tag_sizes { - tag_sizes() : num_ints(0), num_reals(0), num_strings(0) {} - int num_ints; - int num_reals; - int num_strings; -}; - -struct obj_shape { - std::vector v; - std::vector vn; - std::vector vt; -}; - -// -// Manages group of primitives(face, line, points, ...) -struct PrimGroup { - std::vector faceGroup; - std::vector<__line_t> lineGroup; - std::vector<__points_t> pointsGroup; - - void clear() { - faceGroup.clear(); - lineGroup.clear(); - pointsGroup.clear(); - } - - bool IsEmpty() const { - return faceGroup.empty() && lineGroup.empty() && pointsGroup.empty(); - } - - // TODO(syoyo): bspline, surface, ... -}; - -// See -// http://stackoverflow.com/questions/6089231/getting-std-ifstream-to-handle-lf-cr-and-crlf -static std::istream &safeGetline(std::istream &is, std::string &t) { - t.clear(); - - // The characters in the stream are read one-by-one using a std::streambuf. - // That is faster than reading them one-by-one using the std::istream. - // Code that uses streambuf this way must be guarded by a sentry object. - // The sentry object performs various tasks, - // such as thread synchronization and updating the stream state. - - std::istream::sentry se(is, true); - std::streambuf *sb = is.rdbuf(); - - if (se) { - for (;;) { - int c = sb->sbumpc(); - switch (c) { - case '\n': - return is; - case '\r': - if (sb->sgetc() == '\n') sb->sbumpc(); - return is; - case EOF: - // Also handle the case when the last line has no line ending - if (t.empty()) is.setstate(std::ios::eofbit); - return is; - default: - t += static_cast(c); - } - } - } - - return is; -} - -#define IS_SPACE(x) (((x) == ' ') || ((x) == '\t')) -#define IS_DIGIT(x) \ - (static_cast((x) - '0') < static_cast(10)) -#define IS_NEW_LINE(x) (((x) == '\r') || ((x) == '\n') || ((x) == '\0')) - -// Make index zero-base, and also support relative index. -static inline bool fixIndex(int idx, int n, int *ret) { - if (!ret) { - return false; - } - - if (idx > 0) { - (*ret) = idx - 1; - return true; - } - - if (idx == 0) { - // zero is not allowed according to the spec. - return false; - } - - if (idx < 0) { - (*ret) = n + idx; // negative value = relative - return true; - } - - return false; // never reach here. -} - -static inline std::string parseString(const char **token) { - std::string s; - (*token) += strspn((*token), " \t"); - size_t e = strcspn((*token), " \t\r"); - s = std::string((*token), &(*token)[e]); - (*token) += e; - return s; -} - -static inline int parseInt(const char **token) { - (*token) += strspn((*token), " \t"); - int i = atoi((*token)); - (*token) += strcspn((*token), " \t\r"); - return i; -} - -// Tries to parse a floating point number located at s. -// -// s_end should be a location in the string where reading should absolutely -// stop. For example at the end of the string, to prevent buffer overflows. -// -// Parses the following EBNF grammar: -// sign = "+" | "-" ; -// END = ? anything not in digit ? -// digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ; -// integer = [sign] , digit , {digit} ; -// decimal = integer , ["." , integer] ; -// float = ( decimal , END ) | ( decimal , ("E" | "e") , integer , END ) ; -// -// Valid strings are for example: -// -0 +3.1417e+2 -0.0E-3 1.0324 -1.41 11e2 -// -// If the parsing is a success, result is set to the parsed value and true -// is returned. -// -// The function is greedy and will parse until any of the following happens: -// - a non-conforming character is encountered. -// - s_end is reached. -// -// The following situations triggers a failure: -// - s >= s_end. -// - parse failure. -// -static bool tryParseDouble(const char *s, const char *s_end, double *result) { - if (s >= s_end) { - return false; - } - - double mantissa = 0.0; - // This exponent is base 2 rather than 10. - // However the exponent we parse is supposed to be one of ten, - // thus we must take care to convert the exponent/and or the - // mantissa to a * 2^E, where a is the mantissa and E is the - // exponent. - // To get the final double we will use ldexp, it requires the - // exponent to be in base 2. - int exponent = 0; - - // NOTE: THESE MUST BE DECLARED HERE SINCE WE ARE NOT ALLOWED - // TO JUMP OVER DEFINITIONS. - char sign = '+'; - char exp_sign = '+'; - char const *curr = s; - - // How many characters were read in a loop. - int read = 0; - // Tells whether a loop terminated due to reaching s_end. - bool end_not_reached = false; - bool leading_decimal_dots = false; - - /* - BEGIN PARSING. - */ - - // Find out what sign we've got. - if (*curr == '+' || *curr == '-') { - sign = *curr; - curr++; - if ((curr != s_end) && (*curr == '.')) { - // accept. Somethig like `.7e+2`, `-.5234` - leading_decimal_dots = true; - } - } else if (IS_DIGIT(*curr)) { /* Pass through. */ - } else if (*curr == '.') { - // accept. Somethig like `.7e+2`, `-.5234` - leading_decimal_dots = true; - } else { - goto fail; - } - - // Read the integer part. - end_not_reached = (curr != s_end); - if (!leading_decimal_dots) { - while (end_not_reached && IS_DIGIT(*curr)) { - mantissa *= 10; - mantissa += static_cast(*curr - 0x30); - curr++; - read++; - end_not_reached = (curr != s_end); - } - - // We must make sure we actually got something. - if (read == 0) goto fail; - } - - // We allow numbers of form "#", "###" etc. - if (!end_not_reached) goto assemble; - - // Read the decimal part. - if (*curr == '.') { - curr++; - read = 1; - end_not_reached = (curr != s_end); - while (end_not_reached && IS_DIGIT(*curr)) { - static const double pow_lut[] = { - 1.0, 0.1, 0.01, 0.001, 0.0001, 0.00001, 0.000001, 0.0000001, - }; - const int lut_entries = sizeof pow_lut / sizeof pow_lut[0]; - - // NOTE: Don't use powf here, it will absolutely murder precision. - mantissa += static_cast(*curr - 0x30) * - (read < lut_entries ? pow_lut[read] : std::pow(10.0, -read)); - read++; - curr++; - end_not_reached = (curr != s_end); - } - } else if (*curr == 'e' || *curr == 'E') { - } else { - goto assemble; - } - - if (!end_not_reached) goto assemble; - - // Read the exponent part. - if (*curr == 'e' || *curr == 'E') { - curr++; - // Figure out if a sign is present and if it is. - end_not_reached = (curr != s_end); - if (end_not_reached && (*curr == '+' || *curr == '-')) { - exp_sign = *curr; - curr++; - } else if (IS_DIGIT(*curr)) { /* Pass through. */ - } else { - // Empty E is not allowed. - goto fail; - } - - read = 0; - end_not_reached = (curr != s_end); - while (end_not_reached && IS_DIGIT(*curr)) { - exponent *= 10; - exponent += static_cast(*curr - 0x30); - curr++; - read++; - end_not_reached = (curr != s_end); - } - exponent *= (exp_sign == '+' ? 1 : -1); - if (read == 0) goto fail; - } - -assemble: - *result = (sign == '+' ? 1 : -1) * - (exponent ? std::ldexp(mantissa * std::pow(5.0, exponent), exponent) - : mantissa); - return true; -fail: - return false; -} - -static inline real_t parseReal(const char **token, double default_value = 0.0) { - (*token) += strspn((*token), " \t"); - const char *end = (*token) + strcspn((*token), " \t\r"); - double val = default_value; - tryParseDouble((*token), end, &val); - real_t f = static_cast(val); - (*token) = end; - return f; -} - -static inline bool parseReal(const char **token, real_t *out) { - (*token) += strspn((*token), " \t"); - const char *end = (*token) + strcspn((*token), " \t\r"); - double val; - bool ret = tryParseDouble((*token), end, &val); - if (ret) { - real_t f = static_cast(val); - (*out) = f; - } - (*token) = end; - return ret; -} - -static inline void parseReal2(real_t *x, real_t *y, const char **token, - const double default_x = 0.0, - const double default_y = 0.0) { - (*x) = parseReal(token, default_x); - (*y) = parseReal(token, default_y); -} - -static inline void parseReal3(real_t *x, real_t *y, real_t *z, - const char **token, const double default_x = 0.0, - const double default_y = 0.0, - const double default_z = 0.0) { - (*x) = parseReal(token, default_x); - (*y) = parseReal(token, default_y); - (*z) = parseReal(token, default_z); -} - -static inline void parseV(real_t *x, real_t *y, real_t *z, real_t *w, - const char **token, const double default_x = 0.0, - const double default_y = 0.0, - const double default_z = 0.0, - const double default_w = 1.0) { - (*x) = parseReal(token, default_x); - (*y) = parseReal(token, default_y); - (*z) = parseReal(token, default_z); - (*w) = parseReal(token, default_w); -} - -// Extension: parse vertex with colors(6 items) -static inline bool parseVertexWithColor(real_t *x, real_t *y, real_t *z, - real_t *r, real_t *g, real_t *b, - const char **token, - const double default_x = 0.0, - const double default_y = 0.0, - const double default_z = 0.0) { - (*x) = parseReal(token, default_x); - (*y) = parseReal(token, default_y); - (*z) = parseReal(token, default_z); - - const bool found_color = - parseReal(token, r) && parseReal(token, g) && parseReal(token, b); - - if (!found_color) { - (*r) = (*g) = (*b) = 1.0; - } - - return found_color; -} - -static inline bool parseOnOff(const char **token, bool default_value = true) { - (*token) += strspn((*token), " \t"); - const char *end = (*token) + strcspn((*token), " \t\r"); - - bool ret = default_value; - if ((0 == strncmp((*token), "on", 2))) { - ret = true; - } else if ((0 == strncmp((*token), "off", 3))) { - ret = false; - } - - (*token) = end; - return ret; -} - -static inline texture_type_t parseTextureType( - const char **token, texture_type_t default_value = TEXTURE_TYPE_NONE) { - (*token) += strspn((*token), " \t"); - const char *end = (*token) + strcspn((*token), " \t\r"); - texture_type_t ty = default_value; - - if ((0 == strncmp((*token), "cube_top", strlen("cube_top")))) { - ty = TEXTURE_TYPE_CUBE_TOP; - } else if ((0 == strncmp((*token), "cube_bottom", strlen("cube_bottom")))) { - ty = TEXTURE_TYPE_CUBE_BOTTOM; - } else if ((0 == strncmp((*token), "cube_left", strlen("cube_left")))) { - ty = TEXTURE_TYPE_CUBE_LEFT; - } else if ((0 == strncmp((*token), "cube_right", strlen("cube_right")))) { - ty = TEXTURE_TYPE_CUBE_RIGHT; - } else if ((0 == strncmp((*token), "cube_front", strlen("cube_front")))) { - ty = TEXTURE_TYPE_CUBE_FRONT; - } else if ((0 == strncmp((*token), "cube_back", strlen("cube_back")))) { - ty = TEXTURE_TYPE_CUBE_BACK; - } else if ((0 == strncmp((*token), "sphere", strlen("sphere")))) { - ty = TEXTURE_TYPE_SPHERE; - } - - (*token) = end; - return ty; -} - -static tag_sizes parseTagTriple(const char **token) { - tag_sizes ts; - - (*token) += strspn((*token), " \t"); - ts.num_ints = atoi((*token)); - (*token) += strcspn((*token), "/ \t\r"); - if ((*token)[0] != '/') { - return ts; - } - - (*token)++; // Skip '/' - - (*token) += strspn((*token), " \t"); - ts.num_reals = atoi((*token)); - (*token) += strcspn((*token), "/ \t\r"); - if ((*token)[0] != '/') { - return ts; - } - (*token)++; // Skip '/' - - ts.num_strings = parseInt(token); - - return ts; -} - -// Parse triples with index offsets: i, i/j/k, i//k, i/j -static bool parseTriple(const char **token, int vsize, int vnsize, int vtsize, - vertex_index_t *ret) { - if (!ret) { - return false; - } - - vertex_index_t vi(-1); - - if (!fixIndex(atoi((*token)), vsize, &(vi.v_idx))) { - return false; - } - - (*token) += strcspn((*token), "/ \t\r"); - if ((*token)[0] != '/') { - (*ret) = vi; - return true; - } - (*token)++; - - // i//k - if ((*token)[0] == '/') { - (*token)++; - if (!fixIndex(atoi((*token)), vnsize, &(vi.vn_idx))) { - return false; - } - (*token) += strcspn((*token), "/ \t\r"); - (*ret) = vi; - return true; - } - - // i/j/k or i/j - if (!fixIndex(atoi((*token)), vtsize, &(vi.vt_idx))) { - return false; - } - - (*token) += strcspn((*token), "/ \t\r"); - if ((*token)[0] != '/') { - (*ret) = vi; - return true; - } - - // i/j/k - (*token)++; // skip '/' - if (!fixIndex(atoi((*token)), vnsize, &(vi.vn_idx))) { - return false; - } - (*token) += strcspn((*token), "/ \t\r"); - - (*ret) = vi; - - return true; -} - -// Parse raw triples: i, i/j/k, i//k, i/j -static vertex_index_t parseRawTriple(const char **token) { - vertex_index_t vi(static_cast(0)); // 0 is an invalid index in OBJ - - vi.v_idx = atoi((*token)); - (*token) += strcspn((*token), "/ \t\r"); - if ((*token)[0] != '/') { - return vi; - } - (*token)++; - - // i//k - if ((*token)[0] == '/') { - (*token)++; - vi.vn_idx = atoi((*token)); - (*token) += strcspn((*token), "/ \t\r"); - return vi; - } - - // i/j/k or i/j - vi.vt_idx = atoi((*token)); - (*token) += strcspn((*token), "/ \t\r"); - if ((*token)[0] != '/') { - return vi; - } - - // i/j/k - (*token)++; // skip '/' - vi.vn_idx = atoi((*token)); - (*token) += strcspn((*token), "/ \t\r"); - return vi; -} - -bool ParseTextureNameAndOption(std::string *texname, texture_option_t *texopt, - const char *linebuf) { - // @todo { write more robust lexer and parser. } - bool found_texname = false; - std::string texture_name; - - const char *token = linebuf; // Assume line ends with NULL - - while (!IS_NEW_LINE((*token))) { - token += strspn(token, " \t"); // skip space - if ((0 == strncmp(token, "-blendu", 7)) && IS_SPACE((token[7]))) { - token += 8; - texopt->blendu = parseOnOff(&token, /* default */ true); - } else if ((0 == strncmp(token, "-blendv", 7)) && IS_SPACE((token[7]))) { - token += 8; - texopt->blendv = parseOnOff(&token, /* default */ true); - } else if ((0 == strncmp(token, "-clamp", 6)) && IS_SPACE((token[6]))) { - token += 7; - texopt->clamp = parseOnOff(&token, /* default */ true); - } else if ((0 == strncmp(token, "-boost", 6)) && IS_SPACE((token[6]))) { - token += 7; - texopt->sharpness = parseReal(&token, 1.0); - } else if ((0 == strncmp(token, "-bm", 3)) && IS_SPACE((token[3]))) { - token += 4; - texopt->bump_multiplier = parseReal(&token, 1.0); - } else if ((0 == strncmp(token, "-o", 2)) && IS_SPACE((token[2]))) { - token += 3; - parseReal3(&(texopt->origin_offset[0]), &(texopt->origin_offset[1]), - &(texopt->origin_offset[2]), &token); - } else if ((0 == strncmp(token, "-s", 2)) && IS_SPACE((token[2]))) { - token += 3; - parseReal3(&(texopt->scale[0]), &(texopt->scale[1]), &(texopt->scale[2]), - &token, 1.0, 1.0, 1.0); - } else if ((0 == strncmp(token, "-t", 2)) && IS_SPACE((token[2]))) { - token += 3; - parseReal3(&(texopt->turbulence[0]), &(texopt->turbulence[1]), - &(texopt->turbulence[2]), &token); - } else if ((0 == strncmp(token, "-type", 5)) && IS_SPACE((token[5]))) { - token += 5; - texopt->type = parseTextureType((&token), TEXTURE_TYPE_NONE); - } else if ((0 == strncmp(token, "-texres", 7)) && IS_SPACE((token[7]))) { - token += 7; - // TODO(syoyo): Check if arg is int type. - texopt->texture_resolution = parseInt(&token); - } else if ((0 == strncmp(token, "-imfchan", 8)) && IS_SPACE((token[8]))) { - token += 9; - token += strspn(token, " \t"); - const char *end = token + strcspn(token, " \t\r"); - if ((end - token) == 1) { // Assume one char for -imfchan - texopt->imfchan = (*token); - } - token = end; - } else if ((0 == strncmp(token, "-mm", 3)) && IS_SPACE((token[3]))) { - token += 4; - parseReal2(&(texopt->brightness), &(texopt->contrast), &token, 0.0, 1.0); - } else if ((0 == strncmp(token, "-colorspace", 11)) && - IS_SPACE((token[11]))) { - token += 12; - texopt->colorspace = parseString(&token); - } else { -// Assume texture filename -#if 0 - size_t len = strcspn(token, " \t\r"); // untile next space - texture_name = std::string(token, token + len); - token += len; - - token += strspn(token, " \t"); // skip space -#else - // Read filename until line end to parse filename containing whitespace - // TODO(syoyo): Support parsing texture option flag after the filename. - texture_name = std::string(token); - token += texture_name.length(); -#endif - - found_texname = true; - } - } - - if (found_texname) { - (*texname) = texture_name; - return true; - } else { - return false; - } -} - -static void InitTexOpt(texture_option_t *texopt, const bool is_bump) { - if (is_bump) { - texopt->imfchan = 'l'; - } else { - texopt->imfchan = 'm'; - } - texopt->bump_multiplier = static_cast(1.0); - texopt->clamp = false; - texopt->blendu = true; - texopt->blendv = true; - texopt->sharpness = static_cast(1.0); - texopt->brightness = static_cast(0.0); - texopt->contrast = static_cast(1.0); - texopt->origin_offset[0] = static_cast(0.0); - texopt->origin_offset[1] = static_cast(0.0); - texopt->origin_offset[2] = static_cast(0.0); - texopt->scale[0] = static_cast(1.0); - texopt->scale[1] = static_cast(1.0); - texopt->scale[2] = static_cast(1.0); - texopt->turbulence[0] = static_cast(0.0); - texopt->turbulence[1] = static_cast(0.0); - texopt->turbulence[2] = static_cast(0.0); - texopt->texture_resolution = -1; - texopt->type = TEXTURE_TYPE_NONE; -} - -static void InitMaterial(material_t *material) { - InitTexOpt(&material->ambient_texopt, /* is_bump */ false); - InitTexOpt(&material->diffuse_texopt, /* is_bump */ false); - InitTexOpt(&material->specular_texopt, /* is_bump */ false); - InitTexOpt(&material->specular_highlight_texopt, /* is_bump */ false); - InitTexOpt(&material->bump_texopt, /* is_bump */ true); - InitTexOpt(&material->displacement_texopt, /* is_bump */ false); - InitTexOpt(&material->alpha_texopt, /* is_bump */ false); - InitTexOpt(&material->reflection_texopt, /* is_bump */ false); - InitTexOpt(&material->roughness_texopt, /* is_bump */ false); - InitTexOpt(&material->metallic_texopt, /* is_bump */ false); - InitTexOpt(&material->sheen_texopt, /* is_bump */ false); - InitTexOpt(&material->emissive_texopt, /* is_bump */ false); - InitTexOpt(&material->normal_texopt, - /* is_bump */ false); // @fixme { is_bump will be true? } - material->name = ""; - material->ambient_texname = ""; - material->diffuse_texname = ""; - material->specular_texname = ""; - material->specular_highlight_texname = ""; - material->bump_texname = ""; - material->displacement_texname = ""; - material->reflection_texname = ""; - material->alpha_texname = ""; - for (int i = 0; i < 3; i++) { - material->ambient[i] = static_cast(0.0); - material->diffuse[i] = static_cast(0.0); - material->specular[i] = static_cast(0.0); - material->transmittance[i] = static_cast(0.0); - material->emission[i] = static_cast(0.0); - } - material->illum = 0; - material->dissolve = static_cast(1.0); - material->shininess = static_cast(1.0); - material->ior = static_cast(1.0); - - material->roughness = static_cast(0.0); - material->metallic = static_cast(0.0); - material->sheen = static_cast(0.0); - material->clearcoat_thickness = static_cast(0.0); - material->clearcoat_roughness = static_cast(0.0); - material->anisotropy_rotation = static_cast(0.0); - material->anisotropy = static_cast(0.0); - material->roughness_texname = ""; - material->metallic_texname = ""; - material->sheen_texname = ""; - material->emissive_texname = ""; - material->normal_texname = ""; - - material->unknown_parameter.clear(); -} - -// code from https://wrf.ecse.rpi.edu//Research/Short_Notes/pnpoly.html -template -static int pnpoly(int nvert, T *vertx, T *verty, T testx, T testy) { - int i, j, c = 0; - for (i = 0, j = nvert - 1; i < nvert; j = i++) { - if (((verty[i] > testy) != (verty[j] > testy)) && - (testx < - (vertx[j] - vertx[i]) * (testy - verty[i]) / (verty[j] - verty[i]) + - vertx[i])) - c = !c; - } - return c; -} - -// TODO(syoyo): refactor function. -static bool exportGroupsToShape(shape_t *shape, const PrimGroup &prim_group, - const std::vector &tags, - const int material_id, const std::string &name, - bool triangulate, - const std::vector &v) { - if (prim_group.IsEmpty()) { - return false; - } - - shape->name = name; - - // polygon - if (!prim_group.faceGroup.empty()) { - // Flatten vertices and indices - for (size_t i = 0; i < prim_group.faceGroup.size(); i++) { - const face_t &face = prim_group.faceGroup[i]; - - size_t npolys = face.vertex_indices.size(); - - if (npolys < 3) { - // Face must have 3+ vertices. - continue; - } - - vertex_index_t i0 = face.vertex_indices[0]; - vertex_index_t i1(-1); - vertex_index_t i2 = face.vertex_indices[1]; - - if (triangulate) { - // find the two axes to work in - size_t axes[2] = {1, 2}; - for (size_t k = 0; k < npolys; ++k) { - i0 = face.vertex_indices[(k + 0) % npolys]; - i1 = face.vertex_indices[(k + 1) % npolys]; - i2 = face.vertex_indices[(k + 2) % npolys]; - size_t vi0 = size_t(i0.v_idx); - size_t vi1 = size_t(i1.v_idx); - size_t vi2 = size_t(i2.v_idx); - - if (((3 * vi0 + 2) >= v.size()) || ((3 * vi1 + 2) >= v.size()) || - ((3 * vi2 + 2) >= v.size())) { - // Invalid triangle. - // FIXME(syoyo): Is it ok to simply skip this invalid triangle? - continue; - } - real_t v0x = v[vi0 * 3 + 0]; - real_t v0y = v[vi0 * 3 + 1]; - real_t v0z = v[vi0 * 3 + 2]; - real_t v1x = v[vi1 * 3 + 0]; - real_t v1y = v[vi1 * 3 + 1]; - real_t v1z = v[vi1 * 3 + 2]; - real_t v2x = v[vi2 * 3 + 0]; - real_t v2y = v[vi2 * 3 + 1]; - real_t v2z = v[vi2 * 3 + 2]; - real_t e0x = v1x - v0x; - real_t e0y = v1y - v0y; - real_t e0z = v1z - v0z; - real_t e1x = v2x - v1x; - real_t e1y = v2y - v1y; - real_t e1z = v2z - v1z; - real_t cx = std::fabs(e0y * e1z - e0z * e1y); - real_t cy = std::fabs(e0z * e1x - e0x * e1z); - real_t cz = std::fabs(e0x * e1y - e0y * e1x); - const real_t epsilon = std::numeric_limits::epsilon(); - if (cx > epsilon || cy > epsilon || cz > epsilon) { - // found a corner - if (cx > cy && cx > cz) { - } else { - axes[0] = 0; - if (cz > cx && cz > cy) axes[1] = 1; - } - break; - } - } - - real_t area = 0; - for (size_t k = 0; k < npolys; ++k) { - i0 = face.vertex_indices[(k + 0) % npolys]; - i1 = face.vertex_indices[(k + 1) % npolys]; - size_t vi0 = size_t(i0.v_idx); - size_t vi1 = size_t(i1.v_idx); - if (((vi0 * 3 + axes[0]) >= v.size()) || - ((vi0 * 3 + axes[1]) >= v.size()) || - ((vi1 * 3 + axes[0]) >= v.size()) || - ((vi1 * 3 + axes[1]) >= v.size())) { - // Invalid index. - continue; - } - real_t v0x = v[vi0 * 3 + axes[0]]; - real_t v0y = v[vi0 * 3 + axes[1]]; - real_t v1x = v[vi1 * 3 + axes[0]]; - real_t v1y = v[vi1 * 3 + axes[1]]; - area += (v0x * v1y - v0y * v1x) * static_cast(0.5); - } - - face_t remainingFace = face; // copy - size_t guess_vert = 0; - vertex_index_t ind[3]; - real_t vx[3]; - real_t vy[3]; - - // How many iterations can we do without decreasing the remaining - // vertices. - size_t remainingIterations = face.vertex_indices.size(); - size_t previousRemainingVertices = remainingFace.vertex_indices.size(); - - while (remainingFace.vertex_indices.size() > 3 && - remainingIterations > 0) { - npolys = remainingFace.vertex_indices.size(); - if (guess_vert >= npolys) { - guess_vert -= npolys; - } - - if (previousRemainingVertices != npolys) { - // The number of remaining vertices decreased. Reset counters. - previousRemainingVertices = npolys; - remainingIterations = npolys; - } else { - // We didn't consume a vertex on previous iteration, reduce the - // available iterations. - remainingIterations--; - } - - for (size_t k = 0; k < 3; k++) { - ind[k] = remainingFace.vertex_indices[(guess_vert + k) % npolys]; - size_t vi = size_t(ind[k].v_idx); - if (((vi * 3 + axes[0]) >= v.size()) || - ((vi * 3 + axes[1]) >= v.size())) { - // ??? - vx[k] = static_cast(0.0); - vy[k] = static_cast(0.0); - } else { - vx[k] = v[vi * 3 + axes[0]]; - vy[k] = v[vi * 3 + axes[1]]; - } - } - real_t e0x = vx[1] - vx[0]; - real_t e0y = vy[1] - vy[0]; - real_t e1x = vx[2] - vx[1]; - real_t e1y = vy[2] - vy[1]; - real_t cross = e0x * e1y - e0y * e1x; - // if an internal angle - if (cross * area < static_cast(0.0)) { - guess_vert += 1; - continue; - } - - // check all other verts in case they are inside this triangle - bool overlap = false; - for (size_t otherVert = 3; otherVert < npolys; ++otherVert) { - size_t idx = (guess_vert + otherVert) % npolys; - - if (idx >= remainingFace.vertex_indices.size()) { - // ??? - continue; - } - - size_t ovi = size_t(remainingFace.vertex_indices[idx].v_idx); - - if (((ovi * 3 + axes[0]) >= v.size()) || - ((ovi * 3 + axes[1]) >= v.size())) { - // ??? - continue; - } - real_t tx = v[ovi * 3 + axes[0]]; - real_t ty = v[ovi * 3 + axes[1]]; - if (pnpoly(3, vx, vy, tx, ty)) { - overlap = true; - break; - } - } - - if (overlap) { - guess_vert += 1; - continue; - } - - // this triangle is an ear - { - index_t idx0, idx1, idx2; - idx0.vertex_index = ind[0].v_idx; - idx0.normal_index = ind[0].vn_idx; - idx0.texcoord_index = ind[0].vt_idx; - idx1.vertex_index = ind[1].v_idx; - idx1.normal_index = ind[1].vn_idx; - idx1.texcoord_index = ind[1].vt_idx; - idx2.vertex_index = ind[2].v_idx; - idx2.normal_index = ind[2].vn_idx; - idx2.texcoord_index = ind[2].vt_idx; - - shape->mesh.indices.push_back(idx0); - shape->mesh.indices.push_back(idx1); - shape->mesh.indices.push_back(idx2); - - shape->mesh.num_face_vertices.push_back(3); - shape->mesh.material_ids.push_back(material_id); - shape->mesh.smoothing_group_ids.push_back(face.smoothing_group_id); - } - - // remove v1 from the list - size_t removed_vert_index = (guess_vert + 1) % npolys; - while (removed_vert_index + 1 < npolys) { - remainingFace.vertex_indices[removed_vert_index] = - remainingFace.vertex_indices[removed_vert_index + 1]; - removed_vert_index += 1; - } - remainingFace.vertex_indices.pop_back(); - } - - if (remainingFace.vertex_indices.size() == 3) { - i0 = remainingFace.vertex_indices[0]; - i1 = remainingFace.vertex_indices[1]; - i2 = remainingFace.vertex_indices[2]; - { - index_t idx0, idx1, idx2; - idx0.vertex_index = i0.v_idx; - idx0.normal_index = i0.vn_idx; - idx0.texcoord_index = i0.vt_idx; - idx1.vertex_index = i1.v_idx; - idx1.normal_index = i1.vn_idx; - idx1.texcoord_index = i1.vt_idx; - idx2.vertex_index = i2.v_idx; - idx2.normal_index = i2.vn_idx; - idx2.texcoord_index = i2.vt_idx; - - shape->mesh.indices.push_back(idx0); - shape->mesh.indices.push_back(idx1); - shape->mesh.indices.push_back(idx2); - - shape->mesh.num_face_vertices.push_back(3); - shape->mesh.material_ids.push_back(material_id); - shape->mesh.smoothing_group_ids.push_back(face.smoothing_group_id); - } - } - } else { - for (size_t k = 0; k < npolys; k++) { - index_t idx; - idx.vertex_index = face.vertex_indices[k].v_idx; - idx.normal_index = face.vertex_indices[k].vn_idx; - idx.texcoord_index = face.vertex_indices[k].vt_idx; - shape->mesh.indices.push_back(idx); - } - - shape->mesh.num_face_vertices.push_back( - static_cast(npolys)); - shape->mesh.material_ids.push_back(material_id); // per face - shape->mesh.smoothing_group_ids.push_back( - face.smoothing_group_id); // per face - } - } - - shape->mesh.tags = tags; - } - - // line - if (!prim_group.lineGroup.empty()) { - // Flatten indices - for (size_t i = 0; i < prim_group.lineGroup.size(); i++) { - for (size_t j = 0; j < prim_group.lineGroup[i].vertex_indices.size(); - j++) { - const vertex_index_t &vi = prim_group.lineGroup[i].vertex_indices[j]; - - index_t idx; - idx.vertex_index = vi.v_idx; - idx.normal_index = vi.vn_idx; - idx.texcoord_index = vi.vt_idx; - - shape->lines.indices.push_back(idx); - } - - shape->lines.num_line_vertices.push_back( - int(prim_group.lineGroup[i].vertex_indices.size())); - } - } - - // points - if (!prim_group.pointsGroup.empty()) { - // Flatten & convert indices - for (size_t i = 0; i < prim_group.pointsGroup.size(); i++) { - for (size_t j = 0; j < prim_group.pointsGroup[i].vertex_indices.size(); - j++) { - const vertex_index_t &vi = prim_group.pointsGroup[i].vertex_indices[j]; - - index_t idx; - idx.vertex_index = vi.v_idx; - idx.normal_index = vi.vn_idx; - idx.texcoord_index = vi.vt_idx; - - shape->points.indices.push_back(idx); - } - } - } - - return true; -} - -// Split a string with specified delimiter character. -// http://stackoverflow.com/questions/236129/split-a-string-in-c -static void SplitString(const std::string &s, char delim, - std::vector &elems) { - std::stringstream ss; - ss.str(s); - std::string item; - while (std::getline(ss, item, delim)) { - elems.push_back(item); - } -} - -static std::string JoinPath(const std::string &dir, - const std::string &filename) { - if (dir.empty()) { - return filename; - } else { - // check '/' - char lastChar = *dir.rbegin(); - if (lastChar != '/') { - return dir + std::string("/") + filename; - } else { - return dir + filename; - } - } -} - -void LoadMtl(std::map *material_map, - std::vector *materials, std::istream *inStream, - std::string *warning, std::string *err) { - (void)err; - - // Create a default material anyway. - material_t material; - InitMaterial(&material); - - // Issue 43. `d` wins against `Tr` since `Tr` is not in the MTL specification. - bool has_d = false; - bool has_tr = false; - - // has_kd is used to set a default diffuse value when map_Kd is present - // and Kd is not. - bool has_kd = false; - - std::stringstream warn_ss; - - size_t line_no = 0; - std::string linebuf; - while (inStream->peek() != -1) { - safeGetline(*inStream, linebuf); - line_no++; - - // Trim trailing whitespace. - if (linebuf.size() > 0) { - linebuf = linebuf.substr(0, linebuf.find_last_not_of(" \t") + 1); - } - - // Trim newline '\r\n' or '\n' - if (linebuf.size() > 0) { - if (linebuf[linebuf.size() - 1] == '\n') - linebuf.erase(linebuf.size() - 1); - } - if (linebuf.size() > 0) { - if (linebuf[linebuf.size() - 1] == '\r') - linebuf.erase(linebuf.size() - 1); - } - - // Skip if empty line. - if (linebuf.empty()) { - continue; - } - - // Skip leading space. - const char *token = linebuf.c_str(); - token += strspn(token, " \t"); - - assert(token); - if (token[0] == '\0') continue; // empty line - - if (token[0] == '#') continue; // comment line - - // new mtl - if ((0 == strncmp(token, "newmtl", 6)) && IS_SPACE((token[6]))) { - // flush previous material. - if (!material.name.empty()) { - material_map->insert(std::pair( - material.name, static_cast(materials->size()))); - materials->push_back(material); - } - - // initial temporary material - InitMaterial(&material); - - has_d = false; - has_tr = false; - - // set new mtl name - token += 7; - { - std::stringstream sstr; - sstr << token; - material.name = sstr.str(); - } - continue; - } - - // ambient - if (token[0] == 'K' && token[1] == 'a' && IS_SPACE((token[2]))) { - token += 2; - real_t r, g, b; - parseReal3(&r, &g, &b, &token); - material.ambient[0] = r; - material.ambient[1] = g; - material.ambient[2] = b; - continue; - } - - // diffuse - if (token[0] == 'K' && token[1] == 'd' && IS_SPACE((token[2]))) { - token += 2; - real_t r, g, b; - parseReal3(&r, &g, &b, &token); - material.diffuse[0] = r; - material.diffuse[1] = g; - material.diffuse[2] = b; - has_kd = true; - continue; - } - - // specular - if (token[0] == 'K' && token[1] == 's' && IS_SPACE((token[2]))) { - token += 2; - real_t r, g, b; - parseReal3(&r, &g, &b, &token); - material.specular[0] = r; - material.specular[1] = g; - material.specular[2] = b; - continue; - } - - // transmittance - if ((token[0] == 'K' && token[1] == 't' && IS_SPACE((token[2]))) || - (token[0] == 'T' && token[1] == 'f' && IS_SPACE((token[2])))) { - token += 2; - real_t r, g, b; - parseReal3(&r, &g, &b, &token); - material.transmittance[0] = r; - material.transmittance[1] = g; - material.transmittance[2] = b; - continue; - } - - // ior(index of refraction) - if (token[0] == 'N' && token[1] == 'i' && IS_SPACE((token[2]))) { - token += 2; - material.ior = parseReal(&token); - continue; - } - - // emission - if (token[0] == 'K' && token[1] == 'e' && IS_SPACE(token[2])) { - token += 2; - real_t r, g, b; - parseReal3(&r, &g, &b, &token); - material.emission[0] = r; - material.emission[1] = g; - material.emission[2] = b; - continue; - } - - // shininess - if (token[0] == 'N' && token[1] == 's' && IS_SPACE(token[2])) { - token += 2; - material.shininess = parseReal(&token); - continue; - } - - // illum model - if (0 == strncmp(token, "illum", 5) && IS_SPACE(token[5])) { - token += 6; - material.illum = parseInt(&token); - continue; - } - - // dissolve - if ((token[0] == 'd' && IS_SPACE(token[1]))) { - token += 1; - material.dissolve = parseReal(&token); - - if (has_tr) { - warn_ss << "Both `d` and `Tr` parameters defined for \"" - << material.name - << "\". Use the value of `d` for dissolve (line " << line_no - << " in .mtl.)" << std::endl; - } - has_d = true; - continue; - } - if (token[0] == 'T' && token[1] == 'r' && IS_SPACE(token[2])) { - token += 2; - if (has_d) { - // `d` wins. Ignore `Tr` value. - warn_ss << "Both `d` and `Tr` parameters defined for \"" - << material.name - << "\". Use the value of `d` for dissolve (line " << line_no - << " in .mtl.)" << std::endl; - } else { - // We invert value of Tr(assume Tr is in range [0, 1]) - // NOTE: Interpretation of Tr is application(exporter) dependent. For - // some application(e.g. 3ds max obj exporter), Tr = d(Issue 43) - material.dissolve = static_cast(1.0) - parseReal(&token); - } - has_tr = true; - continue; - } - - // PBR: roughness - if (token[0] == 'P' && token[1] == 'r' && IS_SPACE(token[2])) { - token += 2; - material.roughness = parseReal(&token); - continue; - } - - // PBR: metallic - if (token[0] == 'P' && token[1] == 'm' && IS_SPACE(token[2])) { - token += 2; - material.metallic = parseReal(&token); - continue; - } - - // PBR: sheen - if (token[0] == 'P' && token[1] == 's' && IS_SPACE(token[2])) { - token += 2; - material.sheen = parseReal(&token); - continue; - } - - // PBR: clearcoat thickness - if (token[0] == 'P' && token[1] == 'c' && IS_SPACE(token[2])) { - token += 2; - material.clearcoat_thickness = parseReal(&token); - continue; - } - - // PBR: clearcoat roughness - if ((0 == strncmp(token, "Pcr", 3)) && IS_SPACE(token[3])) { - token += 4; - material.clearcoat_roughness = parseReal(&token); - continue; - } - - // PBR: anisotropy - if ((0 == strncmp(token, "aniso", 5)) && IS_SPACE(token[5])) { - token += 6; - material.anisotropy = parseReal(&token); - continue; - } - - // PBR: anisotropy rotation - if ((0 == strncmp(token, "anisor", 6)) && IS_SPACE(token[6])) { - token += 7; - material.anisotropy_rotation = parseReal(&token); - continue; - } - - // ambient texture - if ((0 == strncmp(token, "map_Ka", 6)) && IS_SPACE(token[6])) { - token += 7; - ParseTextureNameAndOption(&(material.ambient_texname), - &(material.ambient_texopt), token); - continue; - } - - // diffuse texture - if ((0 == strncmp(token, "map_Kd", 6)) && IS_SPACE(token[6])) { - token += 7; - ParseTextureNameAndOption(&(material.diffuse_texname), - &(material.diffuse_texopt), token); - - // Set a decent diffuse default value if a diffuse texture is specified - // without a matching Kd value. - if (!has_kd) - { - material.diffuse[0] = static_cast(0.6); - material.diffuse[1] = static_cast(0.6); - material.diffuse[2] = static_cast(0.6); - } - - continue; - } - - // specular texture - if ((0 == strncmp(token, "map_Ks", 6)) && IS_SPACE(token[6])) { - token += 7; - ParseTextureNameAndOption(&(material.specular_texname), - &(material.specular_texopt), token); - continue; - } - - // specular highlight texture - if ((0 == strncmp(token, "map_Ns", 6)) && IS_SPACE(token[6])) { - token += 7; - ParseTextureNameAndOption(&(material.specular_highlight_texname), - &(material.specular_highlight_texopt), token); - continue; - } - - // bump texture - if ((0 == strncmp(token, "map_bump", 8)) && IS_SPACE(token[8])) { - token += 9; - ParseTextureNameAndOption(&(material.bump_texname), - &(material.bump_texopt), token); - continue; - } - - // bump texture - if ((0 == strncmp(token, "map_Bump", 8)) && IS_SPACE(token[8])) { - token += 9; - ParseTextureNameAndOption(&(material.bump_texname), - &(material.bump_texopt), token); - continue; - } - - // bump texture - if ((0 == strncmp(token, "bump", 4)) && IS_SPACE(token[4])) { - token += 5; - ParseTextureNameAndOption(&(material.bump_texname), - &(material.bump_texopt), token); - continue; - } - - // alpha texture - if ((0 == strncmp(token, "map_d", 5)) && IS_SPACE(token[5])) { - token += 6; - material.alpha_texname = token; - ParseTextureNameAndOption(&(material.alpha_texname), - &(material.alpha_texopt), token); - continue; - } - - // displacement texture - if ((0 == strncmp(token, "disp", 4)) && IS_SPACE(token[4])) { - token += 5; - ParseTextureNameAndOption(&(material.displacement_texname), - &(material.displacement_texopt), token); - continue; - } - - // reflection map - if ((0 == strncmp(token, "refl", 4)) && IS_SPACE(token[4])) { - token += 5; - ParseTextureNameAndOption(&(material.reflection_texname), - &(material.reflection_texopt), token); - continue; - } - - // PBR: roughness texture - if ((0 == strncmp(token, "map_Pr", 6)) && IS_SPACE(token[6])) { - token += 7; - ParseTextureNameAndOption(&(material.roughness_texname), - &(material.roughness_texopt), token); - continue; - } - - // PBR: metallic texture - if ((0 == strncmp(token, "map_Pm", 6)) && IS_SPACE(token[6])) { - token += 7; - ParseTextureNameAndOption(&(material.metallic_texname), - &(material.metallic_texopt), token); - continue; - } - - // PBR: sheen texture - if ((0 == strncmp(token, "map_Ps", 6)) && IS_SPACE(token[6])) { - token += 7; - ParseTextureNameAndOption(&(material.sheen_texname), - &(material.sheen_texopt), token); - continue; - } - - // PBR: emissive texture - if ((0 == strncmp(token, "map_Ke", 6)) && IS_SPACE(token[6])) { - token += 7; - ParseTextureNameAndOption(&(material.emissive_texname), - &(material.emissive_texopt), token); - continue; - } - - // PBR: normal map texture - if ((0 == strncmp(token, "norm", 4)) && IS_SPACE(token[4])) { - token += 5; - ParseTextureNameAndOption(&(material.normal_texname), - &(material.normal_texopt), token); - continue; - } - - // unknown parameter - const char *_space = strchr(token, ' '); - if (!_space) { - _space = strchr(token, '\t'); - } - if (_space) { - std::ptrdiff_t len = _space - token; - std::string key(token, static_cast(len)); - std::string value = _space + 1; - material.unknown_parameter.insert( - std::pair(key, value)); - } - } - // flush last material. - material_map->insert(std::pair( - material.name, static_cast(materials->size()))); - materials->push_back(material); - - if (warning) { - (*warning) = warn_ss.str(); - } -} - -bool MaterialFileReader::operator()(const std::string &matId, - std::vector *materials, - std::map *matMap, - std::string *warn, std::string *err) { - if (!m_mtlBaseDir.empty()) { -#ifdef _WIN32 - char sep = ';'; -#else - char sep = ':'; -#endif - - // https://stackoverflow.com/questions/5167625/splitting-a-c-stdstring-using-tokens-e-g - std::vector paths; - std::istringstream f(m_mtlBaseDir); - - std::string s; - while (getline(f, s, sep)) { - paths.push_back(s); - } - - for (size_t i = 0; i < paths.size(); i++) { - std::string filepath = JoinPath(paths[i], matId); - - std::ifstream matIStream(filepath.c_str()); - if (matIStream) { - LoadMtl(matMap, materials, &matIStream, warn, err); - - return true; - } - } - - std::stringstream ss; - ss << "Material file [ " << matId - << " ] not found in a path : " << m_mtlBaseDir << std::endl; - if (warn) { - (*warn) += ss.str(); - } - return false; - - } else { - std::string filepath = matId; - std::ifstream matIStream(filepath.c_str()); - if (matIStream) { - LoadMtl(matMap, materials, &matIStream, warn, err); - - return true; - } - - std::stringstream ss; - ss << "Material file [ " << filepath - << " ] not found in a path : " << m_mtlBaseDir << std::endl; - if (warn) { - (*warn) += ss.str(); - } - - return false; - } -} - -bool MaterialStreamReader::operator()(const std::string &matId, - std::vector *materials, - std::map *matMap, - std::string *warn, std::string *err) { - (void)err; - (void)matId; - if (!m_inStream) { - std::stringstream ss; - ss << "Material stream in error state. " << std::endl; - if (warn) { - (*warn) += ss.str(); - } - return false; - } - - LoadMtl(matMap, materials, &m_inStream, warn, err); - - return true; -} - -bool LoadObj(attrib_t *attrib, std::vector *shapes, - std::vector *materials, std::string *warn, - std::string *err, const char *filename, const char *mtl_basedir, - bool trianglulate, bool default_vcols_fallback) { - attrib->vertices.clear(); - attrib->normals.clear(); - attrib->texcoords.clear(); - attrib->colors.clear(); - shapes->clear(); - - std::stringstream errss; - - std::ifstream ifs(filename); - if (!ifs) { - errss << "Cannot open file [" << filename << "]" << std::endl; - if (err) { - (*err) = errss.str(); - } - return false; - } - - std::string baseDir = mtl_basedir ? mtl_basedir : ""; - if (!baseDir.empty()) { -#ifndef _WIN32 - const char dirsep = '/'; -#else - const char dirsep = '\\'; -#endif - if (baseDir[baseDir.length() - 1] != dirsep) baseDir += dirsep; - } - MaterialFileReader matFileReader(baseDir); - - return LoadObj(attrib, shapes, materials, warn, err, &ifs, &matFileReader, - trianglulate, default_vcols_fallback); -} - -bool LoadObj(attrib_t *attrib, std::vector *shapes, - std::vector *materials, std::string *warn, - std::string *err, std::istream *inStream, - MaterialReader *readMatFn /*= NULL*/, bool triangulate, - bool default_vcols_fallback) { - std::stringstream errss; - - std::vector v; - std::vector vn; - std::vector vt; - std::vector vc; - std::vector tags; - PrimGroup prim_group; - std::string name; - - // material - std::map material_map; - int material = -1; - - // smoothing group id - unsigned int current_smoothing_id = - 0; // Initial value. 0 means no smoothing. - - int greatest_v_idx = -1; - int greatest_vn_idx = -1; - int greatest_vt_idx = -1; - - shape_t shape; - - bool found_all_colors = true; - - size_t line_num = 0; - std::string linebuf; - while (inStream->peek() != -1) { - safeGetline(*inStream, linebuf); - - line_num++; - - // Trim newline '\r\n' or '\n' - if (linebuf.size() > 0) { - if (linebuf[linebuf.size() - 1] == '\n') - linebuf.erase(linebuf.size() - 1); - } - if (linebuf.size() > 0) { - if (linebuf[linebuf.size() - 1] == '\r') - linebuf.erase(linebuf.size() - 1); - } - - // Skip if empty line. - if (linebuf.empty()) { - continue; - } - - // Skip leading space. - const char *token = linebuf.c_str(); - token += strspn(token, " \t"); - - assert(token); - if (token[0] == '\0') continue; // empty line - - if (token[0] == '#') continue; // comment line - - // vertex - if (token[0] == 'v' && IS_SPACE((token[1]))) { - token += 2; - real_t x, y, z; - real_t r, g, b; - - found_all_colors &= parseVertexWithColor(&x, &y, &z, &r, &g, &b, &token); - - v.push_back(x); - v.push_back(y); - v.push_back(z); - - if (found_all_colors || default_vcols_fallback) { - vc.push_back(r); - vc.push_back(g); - vc.push_back(b); - } - - continue; - } - - // normal - if (token[0] == 'v' && token[1] == 'n' && IS_SPACE((token[2]))) { - token += 3; - real_t x, y, z; - parseReal3(&x, &y, &z, &token); - vn.push_back(x); - vn.push_back(y); - vn.push_back(z); - continue; - } - - // texcoord - if (token[0] == 'v' && token[1] == 't' && IS_SPACE((token[2]))) { - token += 3; - real_t x, y; - parseReal2(&x, &y, &token); - vt.push_back(x); - vt.push_back(y); - continue; - } - - // line - if (token[0] == 'l' && IS_SPACE((token[1]))) { - token += 2; - - __line_t line; - - while (!IS_NEW_LINE(token[0])) { - vertex_index_t vi; - if (!parseTriple(&token, static_cast(v.size() / 3), - static_cast(vn.size() / 3), - static_cast(vt.size() / 2), &vi)) { - if (err) { - std::stringstream ss; - ss << "Failed parse `l' line(e.g. zero value for vertex index. " - "line " - << line_num << ".)\n"; - (*err) += ss.str(); - } - return false; - } - - line.vertex_indices.push_back(vi); - - size_t n = strspn(token, " \t\r"); - token += n; - } - - prim_group.lineGroup.push_back(line); - - continue; - } - - // points - if (token[0] == 'p' && IS_SPACE((token[1]))) { - token += 2; - - __points_t pts; - - while (!IS_NEW_LINE(token[0])) { - vertex_index_t vi; - if (!parseTriple(&token, static_cast(v.size() / 3), - static_cast(vn.size() / 3), - static_cast(vt.size() / 2), &vi)) { - if (err) { - std::stringstream ss; - ss << "Failed parse `p' line(e.g. zero value for vertex index. " - "line " - << line_num << ".)\n"; - (*err) += ss.str(); - } - return false; - } - - pts.vertex_indices.push_back(vi); - - size_t n = strspn(token, " \t\r"); - token += n; - } - - prim_group.pointsGroup.push_back(pts); - - continue; - } - - // face - if (token[0] == 'f' && IS_SPACE((token[1]))) { - token += 2; - token += strspn(token, " \t"); - - face_t face; - - face.smoothing_group_id = current_smoothing_id; - face.vertex_indices.reserve(3); - - while (!IS_NEW_LINE(token[0])) { - vertex_index_t vi; - if (!parseTriple(&token, static_cast(v.size() / 3), - static_cast(vn.size() / 3), - static_cast(vt.size() / 2), &vi)) { - if (err) { - std::stringstream ss; - ss << "Failed parse `f' line(e.g. zero value for face index. line " - << line_num << ".)\n"; - (*err) += ss.str(); - } - return false; - } - - greatest_v_idx = greatest_v_idx > vi.v_idx ? greatest_v_idx : vi.v_idx; - greatest_vn_idx = - greatest_vn_idx > vi.vn_idx ? greatest_vn_idx : vi.vn_idx; - greatest_vt_idx = - greatest_vt_idx > vi.vt_idx ? greatest_vt_idx : vi.vt_idx; - - face.vertex_indices.push_back(vi); - size_t n = strspn(token, " \t\r"); - token += n; - } - - // replace with emplace_back + std::move on C++11 - prim_group.faceGroup.push_back(face); - - continue; - } - - // use mtl - if ((0 == strncmp(token, "usemtl", 6))) { - token += 6; - std::string namebuf = parseString(&token); - - int newMaterialId = -1; - std::map::const_iterator it = material_map.find(namebuf); - if (it != material_map.end()) { - newMaterialId = it->second; - } else { - // { error!! material not found } - if (warn) { - (*warn) += "material [ '" + namebuf + "' ] not found in .mtl\n"; - } - } - - if (newMaterialId != material) { - // Create per-face material. Thus we don't add `shape` to `shapes` at - // this time. - // just clear `faceGroup` after `exportGroupsToShape()` call. - exportGroupsToShape(&shape, prim_group, tags, material, name, - triangulate, v); - prim_group.faceGroup.clear(); - material = newMaterialId; - } - - continue; - } - - // load mtl - if ((0 == strncmp(token, "mtllib", 6)) && IS_SPACE((token[6]))) { - if (readMatFn) { - token += 7; - - std::vector filenames; - SplitString(std::string(token), ' ', filenames); - - if (filenames.empty()) { - if (warn) { - std::stringstream ss; - ss << "Looks like empty filename for mtllib. Use default " - "material (line " - << line_num << ".)\n"; - - (*warn) += ss.str(); - } - } else { - bool found = false; - for (size_t s = 0; s < filenames.size(); s++) { - std::string warn_mtl; - std::string err_mtl; - bool ok = (*readMatFn)(filenames[s].c_str(), materials, - &material_map, &warn_mtl, &err_mtl); - if (warn && (!warn_mtl.empty())) { - (*warn) += warn_mtl; - } - - if (err && (!err_mtl.empty())) { - (*err) += err_mtl; - } - - if (ok) { - found = true; - break; - } - } - - if (!found) { - if (warn) { - (*warn) += - "Failed to load material file(s). Use default " - "material.\n"; - } - } - } - } - - continue; - } - - // group name - if (token[0] == 'g' && IS_SPACE((token[1]))) { - // flush previous face group. - bool ret = exportGroupsToShape(&shape, prim_group, tags, material, name, - triangulate, v); - (void)ret; // return value not used. - - if (shape.mesh.indices.size() > 0) { - shapes->push_back(shape); - } - - shape = shape_t(); - - // material = -1; - prim_group.clear(); - - std::vector names; - - while (!IS_NEW_LINE(token[0])) { - std::string str = parseString(&token); - names.push_back(str); - token += strspn(token, " \t\r"); // skip tag - } - - // names[0] must be 'g' - - if (names.size() < 2) { - // 'g' with empty names - if (warn) { - std::stringstream ss; - ss << "Empty group name. line: " << line_num << "\n"; - (*warn) += ss.str(); - name = ""; - } - } else { - std::stringstream ss; - ss << names[1]; - - // tinyobjloader does not support multiple groups for a primitive. - // Currently we concatinate multiple group names with a space to get - // single group name. - - for (size_t i = 2; i < names.size(); i++) { - ss << " " << names[i]; - } - - name = ss.str(); - } - - continue; - } - - // object name - if (token[0] == 'o' && IS_SPACE((token[1]))) { - // flush previous face group. - bool ret = exportGroupsToShape(&shape, prim_group, tags, material, name, - triangulate, v); - (void)ret; // return value not used. - - if (shape.mesh.indices.size() > 0 || shape.lines.indices.size() > 0 || - shape.points.indices.size() > 0) { - shapes->push_back(shape); - } - - // material = -1; - prim_group.clear(); - shape = shape_t(); - - // @todo { multiple object name? } - token += 2; - std::stringstream ss; - ss << token; - name = ss.str(); - - continue; - } - - if (token[0] == 't' && IS_SPACE(token[1])) { - const int max_tag_nums = 8192; // FIXME(syoyo): Parameterize. - tag_t tag; - - token += 2; - - tag.name = parseString(&token); - - tag_sizes ts = parseTagTriple(&token); - - if (ts.num_ints < 0) { - ts.num_ints = 0; - } - if (ts.num_ints > max_tag_nums) { - ts.num_ints = max_tag_nums; - } - - if (ts.num_reals < 0) { - ts.num_reals = 0; - } - if (ts.num_reals > max_tag_nums) { - ts.num_reals = max_tag_nums; - } - - if (ts.num_strings < 0) { - ts.num_strings = 0; - } - if (ts.num_strings > max_tag_nums) { - ts.num_strings = max_tag_nums; - } - - tag.intValues.resize(static_cast(ts.num_ints)); - - for (size_t i = 0; i < static_cast(ts.num_ints); ++i) { - tag.intValues[i] = parseInt(&token); - } - - tag.floatValues.resize(static_cast(ts.num_reals)); - for (size_t i = 0; i < static_cast(ts.num_reals); ++i) { - tag.floatValues[i] = parseReal(&token); - } - - tag.stringValues.resize(static_cast(ts.num_strings)); - for (size_t i = 0; i < static_cast(ts.num_strings); ++i) { - tag.stringValues[i] = parseString(&token); - } - - tags.push_back(tag); - - continue; - } - - if (token[0] == 's' && IS_SPACE(token[1])) { - // smoothing group id - token += 2; - - // skip space. - token += strspn(token, " \t"); // skip space - - if (token[0] == '\0') { - continue; - } - - if (token[0] == '\r' || token[1] == '\n') { - continue; - } - - if (strlen(token) >= 3 && token[0] == 'o' && token[1] == 'f' && - token[2] == 'f') { - current_smoothing_id = 0; - } else { - // assume number - int smGroupId = parseInt(&token); - if (smGroupId < 0) { - // parse error. force set to 0. - // FIXME(syoyo): Report warning. - current_smoothing_id = 0; - } else { - current_smoothing_id = static_cast(smGroupId); - } - } - - continue; - } // smoothing group id - - // Ignore unknown command. - } - - // not all vertices have colors, no default colors desired? -> clear colors - if (!found_all_colors && !default_vcols_fallback) { - vc.clear(); - } - - if (greatest_v_idx >= static_cast(v.size() / 3)) { - if (warn) { - std::stringstream ss; - ss << "Vertex indices out of bounds (line " << line_num << ".)\n" - << std::endl; - (*warn) += ss.str(); - } - } - if (greatest_vn_idx >= static_cast(vn.size() / 3)) { - if (warn) { - std::stringstream ss; - ss << "Vertex normal indices out of bounds (line " << line_num << ".)\n" - << std::endl; - (*warn) += ss.str(); - } - } - if (greatest_vt_idx >= static_cast(vt.size() / 2)) { - if (warn) { - std::stringstream ss; - ss << "Vertex texcoord indices out of bounds (line " << line_num << ".)\n" - << std::endl; - (*warn) += ss.str(); - } - } - - bool ret = exportGroupsToShape(&shape, prim_group, tags, material, name, - triangulate, v); - // exportGroupsToShape return false when `usemtl` is called in the last - // line. - // we also add `shape` to `shapes` when `shape.mesh` has already some - // faces(indices) - if (ret || shape.mesh.indices - .size()) { // FIXME(syoyo): Support other prims(e.g. lines) - shapes->push_back(shape); - } - prim_group.clear(); // for safety - - if (err) { - (*err) += errss.str(); - } - - attrib->vertices.swap(v); - attrib->vertex_weights.swap(v); - attrib->normals.swap(vn); - attrib->texcoords.swap(vt); - attrib->texcoord_ws.swap(vt); - attrib->colors.swap(vc); - - return true; -} - -bool LoadObjWithCallback(std::istream &inStream, const callback_t &callback, - void *user_data /*= NULL*/, - MaterialReader *readMatFn /*= NULL*/, - std::string *warn, /* = NULL*/ - std::string *err /*= NULL*/) { - std::stringstream errss; - - // material - std::map material_map; - int material_id = -1; // -1 = invalid - - std::vector indices; - std::vector materials; - std::vector names; - names.reserve(2); - std::vector names_out; - - std::string linebuf; - while (inStream.peek() != -1) { - safeGetline(inStream, linebuf); - - // Trim newline '\r\n' or '\n' - if (linebuf.size() > 0) { - if (linebuf[linebuf.size() - 1] == '\n') - linebuf.erase(linebuf.size() - 1); - } - if (linebuf.size() > 0) { - if (linebuf[linebuf.size() - 1] == '\r') - linebuf.erase(linebuf.size() - 1); - } - - // Skip if empty line. - if (linebuf.empty()) { - continue; - } - - // Skip leading space. - const char *token = linebuf.c_str(); - token += strspn(token, " \t"); - - assert(token); - if (token[0] == '\0') continue; // empty line - - if (token[0] == '#') continue; // comment line - - // vertex - if (token[0] == 'v' && IS_SPACE((token[1]))) { - token += 2; - // TODO(syoyo): Support parsing vertex color extension. - real_t x, y, z, w; // w is optional. default = 1.0 - parseV(&x, &y, &z, &w, &token); - if (callback.vertex_cb) { - callback.vertex_cb(user_data, x, y, z, w); - } - continue; - } - - // normal - if (token[0] == 'v' && token[1] == 'n' && IS_SPACE((token[2]))) { - token += 3; - real_t x, y, z; - parseReal3(&x, &y, &z, &token); - if (callback.normal_cb) { - callback.normal_cb(user_data, x, y, z); - } - continue; - } - - // texcoord - if (token[0] == 'v' && token[1] == 't' && IS_SPACE((token[2]))) { - token += 3; - real_t x, y, z; // y and z are optional. default = 0.0 - parseReal3(&x, &y, &z, &token); - if (callback.texcoord_cb) { - callback.texcoord_cb(user_data, x, y, z); - } - continue; - } - - // face - if (token[0] == 'f' && IS_SPACE((token[1]))) { - token += 2; - token += strspn(token, " \t"); - - indices.clear(); - while (!IS_NEW_LINE(token[0])) { - vertex_index_t vi = parseRawTriple(&token); - - index_t idx; - idx.vertex_index = vi.v_idx; - idx.normal_index = vi.vn_idx; - idx.texcoord_index = vi.vt_idx; - - indices.push_back(idx); - size_t n = strspn(token, " \t\r"); - token += n; - } - - if (callback.index_cb && indices.size() > 0) { - callback.index_cb(user_data, &indices.at(0), - static_cast(indices.size())); - } - - continue; - } - - // use mtl - if ((0 == strncmp(token, "usemtl", 6)) && IS_SPACE((token[6]))) { - token += 7; - std::stringstream ss; - ss << token; - std::string namebuf = ss.str(); - - int newMaterialId = -1; - std::map::const_iterator it = material_map.find(namebuf); - if (it != material_map.end()) { - newMaterialId = it->second; - } else { - // { warn!! material not found } - if (warn && (!callback.usemtl_cb)) { - (*warn) += "material [ " + namebuf + " ] not found in .mtl\n"; - } - } - - if (newMaterialId != material_id) { - material_id = newMaterialId; - } - - if (callback.usemtl_cb) { - callback.usemtl_cb(user_data, namebuf.c_str(), material_id); - } - - continue; - } - - // load mtl - if ((0 == strncmp(token, "mtllib", 6)) && IS_SPACE((token[6]))) { - if (readMatFn) { - token += 7; - - std::vector filenames; - SplitString(std::string(token), ' ', filenames); - - if (filenames.empty()) { - if (warn) { - (*warn) += - "Looks like empty filename for mtllib. Use default " - "material. \n"; - } - } else { - bool found = false; - for (size_t s = 0; s < filenames.size(); s++) { - std::string warn_mtl; - std::string err_mtl; - bool ok = (*readMatFn)(filenames[s].c_str(), &materials, - &material_map, &warn_mtl, &err_mtl); - - if (warn && (!warn_mtl.empty())) { - (*warn) += warn_mtl; // This should be warn message. - } - - if (err && (!err_mtl.empty())) { - (*err) += err_mtl; - } - - if (ok) { - found = true; - break; - } - } - - if (!found) { - if (warn) { - (*warn) += - "Failed to load material file(s). Use default " - "material.\n"; - } - } else { - if (callback.mtllib_cb) { - callback.mtllib_cb(user_data, &materials.at(0), - static_cast(materials.size())); - } - } - } - } - - continue; - } - - // group name - if (token[0] == 'g' && IS_SPACE((token[1]))) { - names.clear(); - - while (!IS_NEW_LINE(token[0])) { - std::string str = parseString(&token); - names.push_back(str); - token += strspn(token, " \t\r"); // skip tag - } - - assert(names.size() > 0); - - if (callback.group_cb) { - if (names.size() > 1) { - // create const char* array. - names_out.resize(names.size() - 1); - for (size_t j = 0; j < names_out.size(); j++) { - names_out[j] = names[j + 1].c_str(); - } - callback.group_cb(user_data, &names_out.at(0), - static_cast(names_out.size())); - - } else { - callback.group_cb(user_data, NULL, 0); - } - } - - continue; - } - - // object name - if (token[0] == 'o' && IS_SPACE((token[1]))) { - // @todo { multiple object name? } - token += 2; - - std::stringstream ss; - ss << token; - std::string object_name = ss.str(); - - if (callback.object_cb) { - callback.object_cb(user_data, object_name.c_str()); - } - - continue; - } - -#if 0 // @todo - if (token[0] == 't' && IS_SPACE(token[1])) { - tag_t tag; - - token += 2; - std::stringstream ss; - ss << token; - tag.name = ss.str(); - - token += tag.name.size() + 1; - - tag_sizes ts = parseTagTriple(&token); - - tag.intValues.resize(static_cast(ts.num_ints)); - - for (size_t i = 0; i < static_cast(ts.num_ints); ++i) { - tag.intValues[i] = atoi(token); - token += strcspn(token, "/ \t\r") + 1; - } - - tag.floatValues.resize(static_cast(ts.num_reals)); - for (size_t i = 0; i < static_cast(ts.num_reals); ++i) { - tag.floatValues[i] = parseReal(&token); - token += strcspn(token, "/ \t\r") + 1; - } - - tag.stringValues.resize(static_cast(ts.num_strings)); - for (size_t i = 0; i < static_cast(ts.num_strings); ++i) { - std::stringstream ss; - ss << token; - tag.stringValues[i] = ss.str(); - token += tag.stringValues[i].size() + 1; - } - - tags.push_back(tag); - } -#endif - - // Ignore unknown command. - } - - if (err) { - (*err) += errss.str(); - } - - return true; -} - -bool ObjReader::ParseFromFile(const std::string &filename, - const ObjReaderConfig &config) { - std::string mtl_search_path; - - if (config.mtl_search_path.empty()) { - // - // split at last '/'(for unixish system) or '\\'(for windows) to get - // the base directory of .obj file - // - size_t pos = filename.find_last_of("/\\"); - if (pos != std::string::npos) { - mtl_search_path = filename.substr(0, pos); - } - } else { - mtl_search_path = config.mtl_search_path; - } - - valid_ = LoadObj(&attrib_, &shapes_, &materials_, &warning_, &error_, - filename.c_str(), mtl_search_path.c_str(), - config.triangulate, config.vertex_color); - - return valid_; -} - -bool ObjReader::ParseFromString(const std::string &obj_text, - const std::string &mtl_text, - const ObjReaderConfig &config) { - std::stringbuf obj_buf(obj_text); - std::stringbuf mtl_buf(mtl_text); - - std::istream obj_ifs(&obj_buf); - std::istream mtl_ifs(&mtl_buf); - - MaterialStreamReader mtl_ss(mtl_ifs); - - valid_ = LoadObj(&attrib_, &shapes_, &materials_, &warning_, &error_, - &obj_ifs, &mtl_ss, config.triangulate, config.vertex_color); - - return valid_; -} - -#ifdef __clang__ -#pragma clang diagnostic pop -#endif -} // namespace tinyobj - -#endif diff --git a/tutorials/premake5.lua b/tutorials/premake5.lua index 500f491..887cdc8 100644 --- a/tutorials/premake5.lua +++ b/tutorials/premake5.lua @@ -29,7 +29,14 @@ function copydir(src_dir, dst_dir, filter, single_dst_dir) end end + + workspace "hiprtSdkTutorial" + + include("../build/conanbuildinfo.premake.lua") + + conan_basic_setup() + configurations {"Debug", "Release", "RelWithDebInfo", "DebugGpu" } language "C++" platforms "x64" @@ -57,7 +64,7 @@ workspace "hiprtSdkTutorial" if os.ishost("windows") then buildoptions {"/wd4244", "/wd4305", "/wd4018", "/wd4996"} end - buildoptions "-std=c++11" + buildoptions "-std=c++17" include "00_context_creation" @@ -77,7 +84,7 @@ workspace "hiprtSdkTutorial" hiproot = hiproot:gsub([[\]],[[/]]) end copydir( "../hiprt/win/", "./build/" ) - copydir( "../contrib/Orochi/contrib/bin/win64", "./build/" ) + if hiproot ~= nil then copydir( hiproot .."/bin/", "./build/", "amdhip64.dll" ) end