diff --git a/src/SFML/Graphics/stb_image/stb_image.h b/src/SFML/Graphics/stb_image/stb_image.h index 540ad183..759e6653 100644 --- a/src/SFML/Graphics/stb_image/stb_image.h +++ b/src/SFML/Graphics/stb_image/stb_image.h @@ -1,4 +1,4 @@ -/* stbi-1.29 - public domain JPEG/PNG reader - http://nothings.org/stb_image.c +/* stbi-1.31 - public domain JPEG/PNG reader - http://nothings.org/stb_image.c when you control the images you're loading no warranty implied; use at your own risk @@ -17,36 +17,23 @@ HDR (radiance rgbE format) PIC (Softimage PIC) - - decoded from memory or through stdio FILE (define STBI_NO_STDIO to remove code) - - supports installable dequantizing-IDCT, YCbCr-to-RGB conversion (define STBI_SIMD) + - decode from memory or through FILE (define STBI_NO_STDIO to remove code) + - decode from arbitrary I/O callbacks + - overridable dequantizing-IDCT, YCbCr-to-RGB conversion (define STBI_SIMD) Latest revisions: + 1.31 (2011-06-19) a few more leak fixes, bug in PNG handling (SpartanJ) + 1.30 (2011-06-11) added ability to load files via io callbacks (Ben Wenger) 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-uint8 to fix warnings (Laurent Gomila) allow trailing 0s at end of image data (Laurent Gomila) 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 - minor perf improvements for jpeg - deprecated type-specific functions in hope of feedback - attempt to fix trans_data warning (Won Chun) - 1.23 fixed bug in iPhone support - 1.22 (2010-07-10) removed image *writing* support to stb_image_write.h - 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 - 1.21 fix use of 'uint8' in header (reported by jon blow) - 1.20 added support for Softimage PIC, by Tom Seddon See end of file for full revision history. TODO: stbi_info support for BMP,PSD,HDR,PIC - rewrite stbi_info and load_file variations to share file handling code - (current system allows individual functions to be called directly, - since each does all the work, but I doubt anyone uses this in practice) ============================ Contributors ========================= @@ -63,7 +50,10 @@ Extensions, features Janez Zemva Jetro Lauha (stbi_info) Jonathan Blow James "moose2000" Brown (iPhone PNG) Laurent Gomila - Aruelien Pocheville + Ben "Disch" Wenger (io callbacks) Aruelien Pocheville + Ryamond Barbiero + David Woo + Martin Golini If your name should be here but isn't, let Sean know. @@ -91,6 +81,7 @@ // // ... 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: @@ -177,8 +168,26 @@ // not), using: // // stbi_is_hdr(char *filename); +// +// =========================================================================== +// +// 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). + #ifndef STBI_NO_STDIO + +#if defined(_MSC_VER) && _MSC_VER >= 0x1400 +#define _CRT_SECURE_NO_WARNINGS // suppress bogus warnings about fopen() +#endif + #include #endif @@ -200,9 +209,15 @@ typedef unsigned char stbi_uc; extern "C" { #endif +////////////////////////////////////////////////////////////////////////////// +// // PRIMARY API - works on images of any type +// +// // load image by filename, open file, or memory buffer +// + extern stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); #ifndef STBI_NO_STDIO @@ -211,6 +226,15 @@ extern stbi_uc *stbi_load_from_file (FILE *f, int *x, int *y, // for stbi_load_from_file, file pointer is left pointing immediately after image #endif +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,unsigned n); // skip the next 'n' bytes + int (*eof) (void *user); // returns nonzero if we are at end of file/data +} stbi_io_callbacks; + +extern stbi_uc *stbi_load_from_callbacks (stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp); + #ifndef STBI_NO_HDR extern float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); @@ -218,12 +242,22 @@ extern stbi_uc *stbi_load_from_file (FILE *f, int *x, int *y, extern float *stbi_loadf (char const *filename, int *x, int *y, int *comp, int req_comp); extern float *stbi_loadf_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); #endif + + extern float *stbi_loadf_from_callbacks (stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp); extern void stbi_hdr_to_ldr_gamma(float gamma); extern void stbi_hdr_to_ldr_scale(float scale); extern void stbi_ldr_to_hdr_gamma(float gamma); extern void stbi_ldr_to_hdr_scale(float scale); + + #ifndef STBI_NO_STDIO + extern int stbi_is_hdr (char const *filename); + extern int stbi_is_hdr_from_file(FILE *f); + #endif // STBI_NO_STDIO + + extern int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user); + extern int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len); #endif // STBI_NO_HDR // get a VERY brief reason for failure @@ -235,16 +269,16 @@ extern void stbi_image_free (void *retval_from_stbi_load); // get image dimensions & components without fully decoding extern int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp); -extern int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len); +extern int stbi_info_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp); #ifndef STBI_NO_STDIO extern int stbi_info (char const *filename, int *x, int *y, int *comp); extern int stbi_info_from_file (FILE *f, int *x, int *y, int *comp); -extern int stbi_is_hdr (char const *filename); -extern int stbi_is_hdr_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. @@ -264,21 +298,6 @@ extern int stbi_zlib_decode_buffer(char *obuffer, int olen, const char *ibuffe extern char *stbi_zlib_decode_noheader_malloc(const char *buffer, int len, int *outlen); extern int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen); -// define new loaders -typedef struct -{ - int (*test_memory)(stbi_uc const *buffer, int len); - stbi_uc * (*load_from_memory)(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); - #ifndef STBI_NO_STDIO - int (*test_file)(FILE *f); - stbi_uc * (*load_from_file)(FILE *f, int *x, int *y, int *comp, int req_comp); - #endif -} stbi_loader; - -// register a loader by filling out the above structure (you must define ALL functions) -// returns 1 if added or already added, 0 if not added (too many loaders) -// NOT THREADSAFE -extern int stbi_register_loader(stbi_loader *loader); // define faster low-level operations (typically SIMD support) #ifdef STBI_SIMD @@ -300,108 +319,6 @@ extern void stbi_install_YCbCr_to_RGB(stbi_YCbCr_to_RGB_run func); #endif // STBI_SIMD - - -// TYPE-SPECIFIC ACCESS - -#ifdef STBI_TYPE_SPECIFIC_FUNCTIONS - -// is it a jpeg? -extern int stbi_jpeg_test_memory (stbi_uc const *buffer, int len); -extern stbi_uc *stbi_jpeg_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); -extern int stbi_jpeg_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp); - -#ifndef STBI_NO_STDIO -extern stbi_uc *stbi_jpeg_load (char const *filename, int *x, int *y, int *comp, int req_comp); -extern int stbi_jpeg_test_file (FILE *f); -extern stbi_uc *stbi_jpeg_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); - -extern int stbi_jpeg_info (char const *filename, int *x, int *y, int *comp); -extern int stbi_jpeg_info_from_file (FILE *f, int *x, int *y, int *comp); -#endif - -// is it a png? -extern int stbi_png_test_memory (stbi_uc const *buffer, int len); -extern stbi_uc *stbi_png_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); -extern int stbi_png_info_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp); - -#ifndef STBI_NO_STDIO -extern stbi_uc *stbi_png_load (char const *filename, int *x, int *y, int *comp, int req_comp); -extern int stbi_png_info (char const *filename, int *x, int *y, int *comp); -extern int stbi_png_test_file (FILE *f); -extern stbi_uc *stbi_png_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); -extern int stbi_png_info_from_file (FILE *f, int *x, int *y, int *comp); -#endif - -// is it a bmp? -extern int stbi_bmp_test_memory (stbi_uc const *buffer, int len); - -extern stbi_uc *stbi_bmp_load (char const *filename, int *x, int *y, int *comp, int req_comp); -extern stbi_uc *stbi_bmp_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); -#ifndef STBI_NO_STDIO -extern int stbi_bmp_test_file (FILE *f); -extern stbi_uc *stbi_bmp_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); -#endif - -// is it a tga? -extern int stbi_tga_test_memory (stbi_uc const *buffer, int len); - -extern stbi_uc *stbi_tga_load (char const *filename, int *x, int *y, int *comp, int req_comp); -extern stbi_uc *stbi_tga_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); -#ifndef STBI_NO_STDIO -extern int stbi_tga_test_file (FILE *f); -extern stbi_uc *stbi_tga_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); -#endif - -// is it a psd? -extern int stbi_psd_test_memory (stbi_uc const *buffer, int len); - -extern stbi_uc *stbi_psd_load (char const *filename, int *x, int *y, int *comp, int req_comp); -extern stbi_uc *stbi_psd_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); -#ifndef STBI_NO_STDIO -extern int stbi_psd_test_file (FILE *f); -extern stbi_uc *stbi_psd_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); -#endif - -// is it an hdr? -extern int stbi_hdr_test_memory (stbi_uc const *buffer, int len); - -extern float * stbi_hdr_load (char const *filename, int *x, int *y, int *comp, int req_comp); -extern float * stbi_hdr_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); -#ifndef STBI_NO_STDIO -extern int stbi_hdr_test_file (FILE *f); -extern float * stbi_hdr_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); -#endif - -// is it a pic? -extern int stbi_pic_test_memory (stbi_uc const *buffer, int len); - -extern stbi_uc *stbi_pic_load (char const *filename, int *x, int *y, int *comp, int req_comp); -extern stbi_uc *stbi_pic_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); -#ifndef STBI_NO_STDIO -extern int stbi_pic_test_file (FILE *f); -extern stbi_uc *stbi_pic_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); -#endif - -// is it a gif? -extern int stbi_gif_test_memory (stbi_uc const *buffer, int len); - -extern stbi_uc *stbi_gif_load (char const *filename, int *x, int *y, int *comp, int req_comp); -extern stbi_uc *stbi_gif_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); -extern int stbi_gif_info_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp); - -#ifndef STBI_NO_STDIO -extern int stbi_gif_test_file (FILE *f); -extern stbi_uc *stbi_gif_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); -extern int stbi_gif_info (char const *filename, int *x, int *y, int *comp); -extern int stbi_gif_info_from_file (FILE *f, int *x, int *y, int *comp); -#endif - -#endif//STBI_TYPE_SPECIFIC_FUNCTIONS - - - - #ifdef __cplusplus } #endif @@ -415,7 +332,7 @@ extern int stbi_gif_info_from_file (FILE *f, int *x, int #ifndef STBI_NO_HDR #include // ldexp -#include // strcmp +#include // strcmp, strtok #endif #ifndef STBI_NO_STDIO @@ -427,16 +344,18 @@ extern int stbi_gif_info_from_file (FILE *f, int *x, int #include #ifndef _MSC_VER - #ifdef __cplusplus - #define __forceinline inline - #else - #define __forceinline - #endif + #ifdef __cplusplus + #define stbi_inline inline + #else + #define stbi_inline + #endif +#else + #define stbi_inline __forceinline #endif // implementation: -typedef unsigned char uint8; +typedef unsigned char uint8; typedef unsigned short uint16; typedef signed short int16; typedef unsigned int uint32; @@ -453,112 +372,125 @@ typedef unsigned char validate_uint32[sizeof(uint32)==4 ? 1 : -1]; #define STBI_NOTUSED(v) v=v #ifdef _MSC_VER -#define STBI_HAS_LRTOL +#define STBI_HAS_LROTL #endif -#ifdef STBI_HAS_LRTOL +#ifdef STBI_HAS_LROTL #define stbi_lrot(x,y) _lrotl(x,y) #else #define stbi_lrot(x,y) (((x) << (y)) | ((x) >> (32 - (y)))) #endif -////////////////////////////////////////////////////////////////////////////// -// -// Generic API that works on all image types +/////////////////////////////////////////////// // +// stbi struct and start_xxx functions -// deprecated functions +// stbi structure is our basic context used by all images, so it +// contains all the IO context, plus some basic image information +typedef struct +{ + uint32 img_x, img_y; + int img_n, img_out_n; + + stbi_io_callbacks io; + void *io_user_data; -// is it a jpeg? -extern int stbi_jpeg_test_memory (stbi_uc const *buffer, int len); -extern stbi_uc *stbi_jpeg_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); -extern int stbi_jpeg_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp); + int read_from_callbacks; + int buflen; + uint8 buffer_start[128]; + + uint8 *img_buffer, *img_buffer_end; + uint8 *img_buffer_original; +} stbi; + + +static void refill_buffer(stbi *s); + +// initialize a memory-decode context +static void start_mem(stbi *s, uint8 const *buffer, int len) +{ + s->io.read = NULL; + s->read_from_callbacks = 0; + s->img_buffer = s->img_buffer_original = (uint8 *) buffer; + s->img_buffer_end = (uint8 *) buffer+len; +} + +// initialize a callback-based context +static void start_callbacks(stbi *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; + refill_buffer(s); +} #ifndef STBI_NO_STDIO -extern stbi_uc *stbi_jpeg_load (char const *filename, int *x, int *y, int *comp, int req_comp); -extern int stbi_jpeg_test_file (FILE *f); -extern stbi_uc *stbi_jpeg_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); -extern int stbi_jpeg_info (char const *filename, int *x, int *y, int *comp); -extern int stbi_jpeg_info_from_file (FILE *f, int *x, int *y, int *comp); -#endif +static int stdio_read(void *user, char *data, int size) +{ + return (int) fread(data,1,size,(FILE*) user); +} -// is it a png? -extern int stbi_png_test_memory (stbi_uc const *buffer, int len); -extern stbi_uc *stbi_png_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); -extern int stbi_png_info_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp); +static void stdio_skip(void *user, unsigned n) +{ + fseek((FILE*) user, n, SEEK_CUR); +} -#ifndef STBI_NO_STDIO -extern stbi_uc *stbi_png_load (char const *filename, int *x, int *y, int *comp, int req_comp); -extern int stbi_png_info (char const *filename, int *x, int *y, int *comp); -extern int stbi_png_test_file (FILE *f); -extern stbi_uc *stbi_png_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); -extern int stbi_png_info_from_file (FILE *f, int *x, int *y, int *comp); -#endif +static int stdio_eof(void *user) +{ + return feof((FILE*) user); +} -// is it a bmp? -extern int stbi_bmp_test_memory (stbi_uc const *buffer, int len); +static stbi_io_callbacks stbi_stdio_callbacks = +{ + stdio_read, + stdio_skip, + stdio_eof, +}; -extern stbi_uc *stbi_bmp_load (char const *filename, int *x, int *y, int *comp, int req_comp); -extern stbi_uc *stbi_bmp_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); -#ifndef STBI_NO_STDIO -extern int stbi_bmp_test_file (FILE *f); -extern stbi_uc *stbi_bmp_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); -#endif +static void start_file(stbi *s, FILE *f) +{ + start_callbacks(s, &stbi_stdio_callbacks, (void *) f); +} -// is it a tga? -extern int stbi_tga_test_memory (stbi_uc const *buffer, int len); +/* -- [Laurent] this function is not used at all and triggers compiler warnings +static void stop_file(stbi *s) +{ +} +*/ -extern stbi_uc *stbi_tga_load (char const *filename, int *x, int *y, int *comp, int req_comp); -extern stbi_uc *stbi_tga_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); -#ifndef STBI_NO_STDIO -extern int stbi_tga_test_file (FILE *f); -extern stbi_uc *stbi_tga_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); -#endif +#endif // !STBI_NO_STDIO -// is it a psd? -extern int stbi_psd_test_memory (stbi_uc const *buffer, int len); +static void stbi_rewind(stbi *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; +} -extern stbi_uc *stbi_psd_load (char const *filename, int *x, int *y, int *comp, int req_comp); -extern stbi_uc *stbi_psd_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); -#ifndef STBI_NO_STDIO -extern int stbi_psd_test_file (FILE *f); -extern stbi_uc *stbi_psd_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); -#endif - -// is it an hdr? -extern int stbi_hdr_test_memory (stbi_uc const *buffer, int len); - -extern float * stbi_hdr_load (char const *filename, int *x, int *y, int *comp, int req_comp); -extern float * stbi_hdr_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); -#ifndef STBI_NO_STDIO -extern int stbi_hdr_test_file (FILE *f); -extern float * stbi_hdr_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); -#endif - -// is it a pic? -extern int stbi_pic_test_memory (stbi_uc const *buffer, int len); - -extern stbi_uc *stbi_pic_load (char const *filename, int *x, int *y, int *comp, int req_comp); -extern stbi_uc *stbi_pic_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); -#ifndef STBI_NO_STDIO -extern int stbi_pic_test_file (FILE *f); -extern stbi_uc *stbi_pic_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); -#endif - -// is it a gif? -extern int stbi_gif_test_memory (stbi_uc const *buffer, int len); - -extern stbi_uc *stbi_gif_load (char const *filename, int *x, int *y, int *comp, int req_comp); -extern stbi_uc *stbi_gif_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); -extern int stbi_gif_info_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp); - -#ifndef STBI_NO_STDIO -extern int stbi_gif_test_file (FILE *f); -extern stbi_uc *stbi_gif_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); -extern int stbi_gif_info (char const *filename, int *x, int *y, int *comp); -extern int stbi_gif_info_from_file (FILE *f, int *x, int *y, int *comp); -#endif +static int stbi_jpeg_test(stbi *s); +static stbi_uc *stbi_jpeg_load(stbi *s, int *x, int *y, int *comp, int req_comp); +static int stbi_jpeg_info(stbi *s, int *x, int *y, int *comp); +static int stbi_png_test(stbi *s); +static stbi_uc *stbi_png_load(stbi *s, int *x, int *y, int *comp, int req_comp); +static int stbi_png_info(stbi *s, int *x, int *y, int *comp); +static int stbi_bmp_test(stbi *s); +static stbi_uc *stbi_bmp_load(stbi *s, int *x, int *y, int *comp, int req_comp); +static int stbi_tga_test(stbi *s); +static stbi_uc *stbi_tga_load(stbi *s, int *x, int *y, int *comp, int req_comp); +static int stbi_tga_info(stbi *s, int *x, int *y, int *comp); +static int stbi_psd_test(stbi *s); +static stbi_uc *stbi_psd_load(stbi *s, int *x, int *y, int *comp, int req_comp); +static int stbi_hdr_test(stbi *s); +static float *stbi_hdr_load(stbi *s, int *x, int *y, int *comp, int req_comp); +static int stbi_pic_test(stbi *s); +static stbi_uc *stbi_pic_load(stbi *s, int *x, int *y, int *comp, int req_comp); +static int stbi_gif_test(stbi *s); +static stbi_uc *stbi_gif_load(stbi *s, int *x, int *y, int *comp, int req_comp); +static int stbi_gif_info(stbi *s, int *x, int *y, int *comp); // this is not threadsafe @@ -575,6 +507,10 @@ static int e(const char *str) return 0; } +// e - error +// epf - error returning pointer to float +// epuc - error returning pointer to unsigned char + #ifdef STBI_NO_FAILURE_STRINGS #define e(x,y) 0 #elif defined(STBI_FAILURE_USERMSG) @@ -591,33 +527,33 @@ void stbi_image_free(void *retval_from_stbi_load) free(retval_from_stbi_load); } -#define MAX_LOADERS 32 -stbi_loader *loaders[MAX_LOADERS]; -static int max_loaders = 0; - -int stbi_register_loader(stbi_loader *loader) -{ - int i; - for (i=0; i < MAX_LOADERS; ++i) { - // already present? - if (loaders[i] == loader) - return 1; - // end of the list? - if (loaders[i] == NULL) { - loaders[i] = loader; - max_loaders = i+1; - return 1; - } - } - // no room for it - return 0; -} - #ifndef STBI_NO_HDR static float *ldr_to_hdr(stbi_uc *data, int x, int y, int comp); static stbi_uc *hdr_to_ldr(float *data, int x, int y, int comp); #endif +static unsigned char *stbi_load_main(stbi *s, int *x, int *y, int *comp, int req_comp) +{ + if (stbi_jpeg_test(s)) return stbi_jpeg_load(s,x,y,comp,req_comp); + if (stbi_png_test(s)) return stbi_png_load(s,x,y,comp,req_comp); + if (stbi_bmp_test(s)) return stbi_bmp_load(s,x,y,comp,req_comp); + if (stbi_gif_test(s)) return stbi_gif_load(s,x,y,comp,req_comp); + if (stbi_psd_test(s)) return stbi_psd_load(s,x,y,comp,req_comp); + if (stbi_pic_test(s)) return stbi_pic_load(s,x,y,comp,req_comp); + + #ifndef STBI_NO_HDR + if (stbi_hdr_test(s)) { + float *hdr = stbi_hdr_load(s, x,y,comp,req_comp); + return hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp); + } + #endif + + // test tga last because it's a crappy test! + if (stbi_tga_test(s)) + return stbi_tga_load(s,x,y,comp,req_comp); + return epuc("unknown image type", "Image not of any known type, or corrupt"); +} + #ifndef STBI_NO_STDIO unsigned char *stbi_load(char const *filename, int *x, int *y, int *comp, int req_comp) { @@ -631,59 +567,55 @@ unsigned char *stbi_load(char const *filename, int *x, int *y, int *comp, int re unsigned char *stbi_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) { - int i; - if (stbi_jpeg_test_file(f)) return stbi_jpeg_load_from_file(f,x,y,comp,req_comp); - if (stbi_png_test_file(f)) return stbi_png_load_from_file(f,x,y,comp,req_comp); - if (stbi_bmp_test_file(f)) return stbi_bmp_load_from_file(f,x,y,comp,req_comp); - if (stbi_gif_test_file(f)) return stbi_gif_load_from_file(f,x,y,comp,req_comp); - if (stbi_psd_test_file(f)) return stbi_psd_load_from_file(f,x,y,comp,req_comp); - if (stbi_pic_test_file(f)) return stbi_pic_load_from_file(f,x,y,comp,req_comp); - - #ifndef STBI_NO_HDR - if (stbi_hdr_test_file(f)) { - float *hdr = stbi_hdr_load_from_file(f, x,y,comp,req_comp); - return hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp); - } - #endif - - for (i=0; i < max_loaders; ++i) - if (loaders[i]->test_file(f)) - return loaders[i]->load_from_file(f,x,y,comp,req_comp); - // test tga last because it's a crappy test! - if (stbi_tga_test_file(f)) - return stbi_tga_load_from_file(f,x,y,comp,req_comp); - return epuc("unknown image type", "Image not of any known type, or corrupt"); + stbi s; + start_file(&s,f); + return stbi_load_main(&s,x,y,comp,req_comp); } -#endif +#endif //!STBI_NO_STDIO unsigned char *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) { - int i; - if (stbi_jpeg_test_memory(buffer,len)) return stbi_jpeg_load_from_memory(buffer,len,x,y,comp,req_comp); - if (stbi_png_test_memory(buffer,len)) return stbi_png_load_from_memory(buffer,len,x,y,comp,req_comp); - if (stbi_bmp_test_memory(buffer,len)) return stbi_bmp_load_from_memory(buffer,len,x,y,comp,req_comp); - if (stbi_gif_test_memory(buffer,len)) return stbi_gif_load_from_memory(buffer,len,x,y,comp,req_comp); - if (stbi_psd_test_memory(buffer,len)) return stbi_psd_load_from_memory(buffer,len,x,y,comp,req_comp); - if (stbi_pic_test_memory(buffer,len)) return stbi_pic_load_from_memory(buffer,len,x,y,comp,req_comp); + stbi s; + start_mem(&s,buffer,len); + return stbi_load_main(&s,x,y,comp,req_comp); +} - #ifndef STBI_NO_HDR - if (stbi_hdr_test_memory(buffer, len)) { - float *hdr = stbi_hdr_load_from_memory(buffer, len,x,y,comp,req_comp); - return hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp); - } - #endif - - for (i=0; i < max_loaders; ++i) - if (loaders[i]->test_memory(buffer,len)) - return loaders[i]->load_from_memory(buffer,len,x,y,comp,req_comp); - // test tga last because it's a crappy test! - if (stbi_tga_test_memory(buffer,len)) - return stbi_tga_load_from_memory(buffer,len,x,y,comp,req_comp); - return epuc("unknown image type", "Image not of any known type, or corrupt"); +unsigned char *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_callbacks(&s, (stbi_io_callbacks *) clbk, user); + return stbi_load_main(&s,x,y,comp,req_comp); } #ifndef STBI_NO_HDR +float *stbi_loadf_main(stbi *s, int *x, int *y, int *comp, int req_comp) +{ + unsigned char *data; + #ifndef STBI_NO_HDR + if (stbi_hdr_test(s)) + return stbi_hdr_load(s,x,y,comp,req_comp); + #endif + data = stbi_load_main(s, x, y, comp, req_comp); + if (data) + return ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp); + return epf("unknown image type", "Image not of any known type, or corrupt"); +} + +float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_mem(&s,buffer,len); + return stbi_loadf_main(&s,x,y,comp,req_comp); +} + +float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_callbacks(&s, (stbi_io_callbacks *) clbk, user); + return stbi_loadf_main(&s,x,y,comp,req_comp); +} + #ifndef STBI_NO_STDIO float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp) { @@ -697,31 +629,13 @@ float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp) float *stbi_loadf_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) { - unsigned char *data; - #ifndef STBI_NO_HDR - if (stbi_hdr_test_file(f)) - return stbi_hdr_load_from_file(f,x,y,comp,req_comp); - #endif - data = stbi_load_from_file(f, x, y, comp, req_comp); - if (data) - return ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp); - return epf("unknown image type", "Image not of any known type, or corrupt"); + stbi s; + start_file(&s,f); + return stbi_loadf_main(&s,x,y,comp,req_comp); } -#endif +#endif // !STBI_NO_STDIO -float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) -{ - stbi_uc *data; - #ifndef STBI_NO_HDR - if (stbi_hdr_test_memory(buffer, len)) - return stbi_hdr_load_from_memory(buffer, len,x,y,comp,req_comp); - #endif - data = stbi_load_from_memory(buffer, len, x, y, comp, req_comp); - if (data) - return ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp); - return epf("unknown image type", "Image not of any known type, or corrupt"); -} -#endif +#endif // !STBI_NO_HDR // these is-hdr-or-not is defined independent of whether STBI_NO_HDR is // defined, for API simplicity; if STBI_NO_HDR is defined, it always @@ -730,7 +644,9 @@ float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, in int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len) { #ifndef STBI_NO_HDR - return stbi_hdr_test_memory(buffer, len); + stbi s; + start_mem(&s,buffer,len); + return stbi_hdr_test(&s); #else STBI_NOTUSED(buffer); STBI_NOTUSED(len); @@ -753,13 +669,25 @@ extern int stbi_is_hdr (char const *filename) extern int stbi_is_hdr_from_file(FILE *f) { #ifndef STBI_NO_HDR - return stbi_hdr_test_file(f); + stbi s; + start_file(&s,f); + return stbi_hdr_test(&s); #else return 0; #endif } +#endif // !STBI_NO_STDIO -#endif +extern int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user) +{ + #ifndef STBI_NO_HDR + stbi s; + start_callbacks(&s, (stbi_io_callbacks *) clbk, user); + return stbi_hdr_test(&s); + #else + return 0; + #endif +} #ifndef STBI_NO_HDR static float h2l_gamma_i=1.0f/2.2f, h2l_scale_i=1.0f; @@ -785,47 +713,12 @@ enum SCAN_header }; -typedef struct -{ - uint32 img_x, img_y; - int img_n, img_out_n; - - #ifndef STBI_NO_STDIO - FILE *img_file; - int buflen; - uint8 buffer_start[128]; - int from_file; - #endif - uint8 *img_buffer, *img_buffer_end; -} stbi; - -#ifndef STBI_NO_STDIO -static void start_file(stbi *s, FILE *f) -{ - s->img_file = f; - s->buflen = sizeof(s->buffer_start); - s->img_buffer_end = s->buffer_start + s->buflen; - s->img_buffer = s->img_buffer_end; - s->from_file = 1; -} -#endif - -static void start_mem(stbi *s, uint8 const *buffer, int len) -{ -#ifndef STBI_NO_STDIO - s->img_file = NULL; - s->from_file = 0; -#endif - s->img_buffer = (uint8 *) buffer; - s->img_buffer_end = (uint8 *) buffer+len; -} - -#ifndef STBI_NO_STDIO static void refill_buffer(stbi *s) { - int n = fread(s->buffer_start, 1, s->buflen, s->img_file); + int n = (s->io.read)(s->io_user_data,(char*)s->buffer_start,s->buflen); if (n == 0) { - s->from_file = 0; + // at end of file, treat same as if from memory + s->read_from_callbacks = 0; s->img_buffer = s->img_buffer_end-1; *s->img_buffer = 0; } else { @@ -833,68 +726,64 @@ static void refill_buffer(stbi *s) s->img_buffer_end = s->buffer_start + n; } } -#endif -__forceinline static int get8(stbi *s) +stbi_inline static int get8(stbi *s) { if (s->img_buffer < s->img_buffer_end) return *s->img_buffer++; -#ifndef STBI_NO_STDIO - if (s->from_file) { + if (s->read_from_callbacks) { refill_buffer(s); return *s->img_buffer++; } -#endif return 0; } -__forceinline static int at_eof(stbi *s) +stbi_inline static int at_eof(stbi *s) { -#ifndef STBI_NO_STDIO - if (s->img_file) { - if (!feof(s->img_file)) return 0; + 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->from_file == 0) return 1; + if (s->read_from_callbacks == 0) return 1; } -#endif + return s->img_buffer >= s->img_buffer_end; } -__forceinline static uint8 get8u(stbi *s) +stbi_inline static uint8 get8u(stbi *s) { return (uint8) get8(s); } static void skip(stbi *s, int n) { -#ifndef STBI_NO_STDIO - if (s->img_file) { + if (s->io.read) { int blen = s->img_buffer_end - s->img_buffer; if (blen < n) { s->img_buffer = s->img_buffer_end; - fseek(s->img_file, n - blen, SEEK_CUR); + (s->io.skip)(s->io_user_data, n - blen); return; } } -#endif s->img_buffer += n; } static int getn(stbi *s, stbi_uc *buffer, int n) { -#ifndef STBI_NO_STDIO - if (s->img_file) { + if (s->io.read) { int blen = s->img_buffer_end - s->img_buffer; if (blen < n) { - int res; + int res, count; + memcpy(buffer, s->img_buffer, blen); - res = ((int) fread(buffer + blen, 1, n - blen, s->img_file) == (n-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; } } -#endif + if (s->img_buffer+n <= s->img_buffer_end) { memcpy(buffer, s->img_buffer, n); s->img_buffer += n; @@ -1078,7 +967,7 @@ typedef struct #ifdef STBI_SIMD unsigned short dequant2[4][64]; #endif - stbi s; + stbi *s; huffman huff_dc[4]; huffman huff_ac[4]; uint8 dequant[4][64]; @@ -1156,9 +1045,9 @@ static int build_huffman(huffman *h, int *count) static void grow_buffer_unsafe(jpeg *j) { do { - int b = j->nomore ? 0 : get8(&j->s); + int b = j->nomore ? 0 : get8(j->s); if (b == 0xff) { - int c = get8(&j->s); + int c = get8(j->s); if (c != 0) { j->marker = (unsigned char) c; j->nomore = 1; @@ -1174,7 +1063,7 @@ static void grow_buffer_unsafe(jpeg *j) static uint32 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 -__forceinline static int decode(jpeg *j, huffman *h) +stbi_inline static int decode(jpeg *j, huffman *h) { unsigned int temp; int c,k; @@ -1225,7 +1114,7 @@ __forceinline static int decode(jpeg *j, huffman *h) // combined JPEG 'receive' and JPEG 'extend', since baseline // always extends everything it receives. -__forceinline static int extend_receive(jpeg *j, int n) +stbi_inline static int extend_receive(jpeg *j, int n) { unsigned int m = 1 << (n-1); unsigned int k; @@ -1303,7 +1192,7 @@ static int decode_block(jpeg *j, short data[64], huffman *hdc, huffman *hac, int } // take a -128..127 value and clamp it and convert to 0..255 -__forceinline static uint8 clamp(int x) +stbi_inline static uint8 clamp(int x) { // trick to use a single test to catch both cases if ((unsigned int) x > 255) { @@ -1425,7 +1314,7 @@ static void idct_block(uint8 *out, int out_stride, short data[64], stbi_dequanti #ifdef STBI_SIMD static stbi_idct_8x8 stbi_idct_installed = idct_block; -extern void stbi_install_idct(stbi_idct_8x8 func) +void stbi_install_idct(stbi_idct_8x8 func) { stbi_idct_installed = func; } @@ -1439,10 +1328,10 @@ static uint8 get_marker(jpeg *j) { uint8 x; if (j->marker != MARKER_none) { x = j->marker; j->marker = MARKER_none; return x; } - x = get8u(&j->s); + x = get8u(j->s); if (x != 0xff) return MARKER_none; while (x == 0xff) - x = get8u(&j->s); + x = get8u(j->s); return x; } @@ -1547,20 +1436,20 @@ static int process_marker(jpeg *z, int m) return e("progressive jpeg","JPEG format not supported (progressive)"); case 0xDD: // DRI - specify restart interval - if (get16(&z->s) != 4) return e("bad DRI len","Corrupt JPEG"); - z->restart_interval = get16(&z->s); + if (get16(z->s) != 4) return e("bad DRI len","Corrupt JPEG"); + z->restart_interval = get16(z->s); return 1; case 0xDB: // DQT - define quantization table - L = get16(&z->s)-2; + L = get16(z->s)-2; while (L > 0) { - int q = get8(&z->s); + int q = get8(z->s); int p = q >> 4; int t = q & 15,i; if (p != 0) return e("bad DQT type","Corrupt JPEG"); if (t > 3) return e("bad DQT table","Corrupt JPEG"); for (i=0; i < 64; ++i) - z->dequant[t][dezigzag[i]] = get8u(&z->s); + z->dequant[t][dezigzag[i]] = get8u(z->s); #ifdef STBI_SIMD for (i=0; i < 64; ++i) z->dequant2[t][i] = z->dequant[t][i]; @@ -1570,16 +1459,16 @@ static int process_marker(jpeg *z, int m) return L==0; case 0xC4: // DHT - define huffman table - L = get16(&z->s)-2; + L = get16(z->s)-2; while (L > 0) { uint8 *v; int sizes[16],i,m=0; - int q = get8(&z->s); + int q = get8(z->s); int tc = q >> 4; int th = q & 15; if (tc > 1 || th > 3) return e("bad DHT header","Corrupt JPEG"); for (i=0; i < 16; ++i) { - sizes[i] = get8(&z->s); + sizes[i] = get8(z->s); m += sizes[i]; } L -= 17; @@ -1591,14 +1480,14 @@ static int process_marker(jpeg *z, int m) v = z->huff_ac[th].values; } for (i=0; i < m; ++i) - v[i] = get8u(&z->s); + v[i] = get8u(z->s); L -= m; } return L==0; } // check for comment block or APP blocks if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) { - skip(&z->s, get16(&z->s)-2); + skip(z->s, get16(z->s)-2); return 1; } return 0; @@ -1608,31 +1497,31 @@ static int process_marker(jpeg *z, int m) static int process_scan_header(jpeg *z) { int i; - int Ls = get16(&z->s); - z->scan_n = get8(&z->s); - if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int) z->s.img_n) return e("bad SOS component count","Corrupt JPEG"); + int Ls = get16(z->s); + z->scan_n = get8(z->s); + if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int) z->s->img_n) return e("bad SOS component count","Corrupt JPEG"); if (Ls != 6+2*z->scan_n) return e("bad SOS len","Corrupt JPEG"); for (i=0; i < z->scan_n; ++i) { - int id = get8(&z->s), which; - int q = get8(&z->s); - for (which = 0; which < z->s.img_n; ++which) + int id = get8(z->s), which; + int q = 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; + if (which == z->s->img_n) return 0; z->img_comp[which].hd = q >> 4; if (z->img_comp[which].hd > 3) return e("bad DC huff","Corrupt JPEG"); z->img_comp[which].ha = q & 15; if (z->img_comp[which].ha > 3) return e("bad AC huff","Corrupt JPEG"); z->order[i] = which; } - if (get8(&z->s) != 0) return e("bad SOS","Corrupt JPEG"); - get8(&z->s); // should be 63, but might be 0 - if (get8(&z->s) != 0) return e("bad SOS","Corrupt JPEG"); + if (get8(z->s) != 0) return e("bad SOS","Corrupt JPEG"); + get8(z->s); // should be 63, but might be 0 + if (get8(z->s) != 0) return e("bad SOS","Corrupt JPEG"); return 1; } static int process_frame_header(jpeg *z, int scan) { - stbi *s = &z->s; + stbi *s = z->s; int Lf,p,i,q, h_max=1,v_max=1,c; Lf = get16(s); if (Lf < 11) return e("bad SOF len","Corrupt JPEG"); // JPEG p = get8(s); if (p != 8) return e("only 8-bit","JPEG format not supported: 8-bit only"); // JPEG baseline @@ -1722,7 +1611,7 @@ static int decode_jpeg_header(jpeg *z, int scan) m = get_marker(z); while (m == MARKER_none) { // some files have extra padding after their blocks, so ok, we'll scan - if (at_eof(&z->s)) return e("no SOF", "Corrupt JPEG"); + if (at_eof(z->s)) return e("no SOF", "Corrupt JPEG"); m = get_marker(z); } } @@ -1742,10 +1631,10 @@ static int decode_jpeg_image(jpeg *j) if (!parse_entropy_coded_data(j)) return 0; if (j->marker == MARKER_none ) { // handle 0s at the end of image data from IP Kamera 9060 - while (!at_eof(&j->s)) { - int x = get8(&j->s); + while (!at_eof(j->s)) { + int x = get8(j->s); if (x == 255) { - j->marker = get8u(&j->s); + j->marker = get8u(j->s); break; } else if (x != 0) { return 0; @@ -1895,7 +1784,7 @@ void stbi_install_YCbCr_to_RGB(stbi_YCbCr_to_RGB_run func) static void cleanup_jpeg(jpeg *j) { int i; - for (i=0; i < j->s.img_n; ++i) { + for (i=0; i < j->s->img_n; ++i) { if (j->img_comp[i].data) { free(j->img_comp[i].raw_data); j->img_comp[i].data = NULL; @@ -1922,18 +1811,18 @@ static uint8 *load_jpeg_image(jpeg *z, int *out_x, int *out_y, int *comp, int re int n, decode_n; // validate req_comp if (req_comp < 0 || req_comp > 4) return epuc("bad req_comp", "Internal error"); - z->s.img_n = 0; + z->s->img_n = 0; // load a jpeg image from whichever source if (!decode_jpeg_image(z)) { cleanup_jpeg(z); return NULL; } // determine actual number of components to generate - n = req_comp ? req_comp : z->s.img_n; + n = req_comp ? req_comp : z->s->img_n; - if (z->s.img_n == 3 && n < 3) + if (z->s->img_n == 3 && n < 3) decode_n = 1; else - decode_n = z->s.img_n; + decode_n = z->s->img_n; // resample and color-convert { @@ -1949,13 +1838,13 @@ static uint8 *load_jpeg_image(jpeg *z, int *out_x, int *out_y, int *comp, int re // allocate line buffer big enough for upsampling off the edges // with upsample factor of 4 - z->img_comp[k].linebuf = (uint8 *) malloc(z->s.img_x + 3); + z->img_comp[k].linebuf = (uint8 *) malloc(z->s->img_x + 3); if (!z->img_comp[k].linebuf) { cleanup_jpeg(z); return epuc("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->w_lores = (z->s->img_x + r->hs-1) / r->hs; r->ypos = 0; r->line0 = r->line1 = z->img_comp[k].data; @@ -1967,12 +1856,12 @@ static uint8 *load_jpeg_image(jpeg *z, int *out_x, int *out_y, int *comp, int re } // can't error after this so, this is safe - output = (uint8 *) malloc(n * z->s.img_x * z->s.img_y + 1); + output = (uint8 *) malloc(n * z->s->img_x * z->s->img_y + 1); if (!output) { cleanup_jpeg(z); return epuc("outofmem", "Out of memory"); } // now go ahead and resample - for (j=0; j < z->s.img_y; ++j) { - uint8 *out = output + n * z->s.img_x * j; + for (j=0; j < z->s->img_y; ++j) { + uint8 *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); @@ -1989,14 +1878,14 @@ static uint8 *load_jpeg_image(jpeg *z, int *out_x, int *out_y, int *comp, int re } if (n >= 3) { uint8 *y = coutput[0]; - if (z->s.img_n == 3) { + if (z->s->img_n == 3) { #ifdef STBI_SIMD stbi_YCbCr_installed(out, y, coutput[1], coutput[2], z->s.img_x, n); #else - YCbCr_to_RGB_row(out, y, coutput[1], coutput[2], z->s.img_x, n); + YCbCr_to_RGB_row(out, y, coutput[1], coutput[2], z->s->img_x, n); #endif } else - for (i=0; i < z->s.img_x; ++i) { + 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; @@ -2004,118 +1893,53 @@ static uint8 *load_jpeg_image(jpeg *z, int *out_x, int *out_y, int *comp, int re } else { uint8 *y = coutput[0]; if (n == 1) - for (i=0; i < z->s.img_x; ++i) out[i] = y[i]; + 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; + for (i=0; i < z->s->img_x; ++i) *out++ = y[i], *out++ = 255; } } cleanup_jpeg(z); - *out_x = z->s.img_x; - *out_y = z->s.img_y; - if (comp) *comp = z->s.img_n; // report original components, not output + *out_x = z->s->img_x; + *out_y = z->s->img_y; + if (comp) *comp = z->s->img_n; // report original components, not output return output; } } -#ifndef STBI_NO_STDIO -unsigned char *stbi_jpeg_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) +static unsigned char *stbi_jpeg_load(stbi *s, int *x, int *y, int *comp, int req_comp) { jpeg j; - start_file(&j.s, f); + j.s = s; return load_jpeg_image(&j, x,y,comp,req_comp); } -unsigned char *stbi_jpeg_load(char const *filename, int *x, int *y, int *comp, int req_comp) +static int stbi_jpeg_test(stbi *s) { - unsigned char *data; - FILE *f = fopen(filename, "rb"); - if (!f) return NULL; - data = stbi_jpeg_load_from_file(f,x,y,comp,req_comp); - fclose(f); - return data; -} -#endif - -unsigned char *stbi_jpeg_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) -{ - #ifdef STBI_SMALL_STACK - unsigned char *result; - jpeg *j = (jpeg *) malloc(sizeof(*j)); - start_mem(&j->s, buffer, len); - result = load_jpeg_image(j,x,y,comp,req_comp); - free(j); - return result; - #else + int r; jpeg j; - start_mem(&j.s, buffer,len); - return load_jpeg_image(&j, x,y,comp,req_comp); - #endif + j.s = s; + r = decode_jpeg_header(&j, SCAN_type); + stbi_rewind(s); + return r; } static int stbi_jpeg_info_raw(jpeg *j, int *x, int *y, int *comp) { if (!decode_jpeg_header(j, SCAN_header)) return 0; - if (x) *x = j->s.img_x; - if (y) *y = j->s.img_y; - if (comp) *comp = j->s.img_n; + if (x) *x = j->s->img_x; + if (y) *y = j->s->img_y; + if (comp) *comp = j->s->img_n; return 1; } -#ifndef STBI_NO_STDIO -int stbi_jpeg_test_file(FILE *f) -{ - int n,r; - jpeg j; - n = ftell(f); - start_file(&j.s, f); - r = decode_jpeg_header(&j, SCAN_type); - fseek(f,n,SEEK_SET); - return r; -} - -int stbi_jpeg_info_from_file(FILE *f, int *x, int *y, int *comp) -{ - jpeg j; - long n = ftell(f); - int res; - start_file(&j.s, f); - res = stbi_jpeg_info_raw(&j, x, y, comp); - fseek(f, n, SEEK_SET); - return res; -} - -int stbi_jpeg_info(char const *filename, int *x, int *y, int *comp) -{ - FILE *f = fopen(filename, "rb"); - int result; - if (!f) return e("can't fopen", "Unable to open file"); - result = stbi_jpeg_info_from_file(f, x, y, comp); - fclose(f); - return result; -} -#endif - -int stbi_jpeg_test_memory(stbi_uc const *buffer, int len) +static int stbi_jpeg_info(stbi *s, int *x, int *y, int *comp) { jpeg j; - start_mem(&j.s, buffer,len); - return decode_jpeg_header(&j, SCAN_type); + j.s = s; + return stbi_jpeg_info_raw(&j, x, y, comp); } -int stbi_jpeg_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp) -{ - jpeg j; - start_mem(&j.s, buffer, len); - return stbi_jpeg_info_raw(&j, x, y, comp); -} - -#ifndef STBI_NO_STDIO -extern int stbi_jpeg_info (char const *filename, int *x, int *y, int *comp); -extern int stbi_jpeg_info_from_file (FILE *f, int *x, int *y, int *comp); -#endif -extern int stbi_jpeg_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp); - // public domain zlib decode v0.2 Sean Barrett 2006-11-18 // simple implementation // - all input must be provided in an upfront buffer @@ -2139,7 +1963,7 @@ typedef struct uint16 value[288]; } zhuffman; -__forceinline static int bitreverse16(int n) +stbi_inline static int bitreverse16(int n) { n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1); n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2); @@ -2148,7 +1972,7 @@ __forceinline static int bitreverse16(int n) return n; } -__forceinline static int bit_reverse(int v, int bits) +stbi_inline static int bit_reverse(int v, int bits) { assert(bits <= 16); // to bit reverse n bits, reverse 16 and shift @@ -2221,7 +2045,7 @@ typedef struct zhuffman z_length, z_distance; } zbuf; -__forceinline static int zget8(zbuf *z) +stbi_inline static int zget8(zbuf *z) { if (z->zbuffer >= z->zbuffer_end) return 0; return *z->zbuffer++; @@ -2236,7 +2060,7 @@ static void fill_bits(zbuf *z) } while (z->num_bits <= 24); } -__forceinline static unsigned int zreceive(zbuf *z, int n) +stbi_inline static unsigned int zreceive(zbuf *z, int n) { unsigned int k; if (z->num_bits < n) fill_bits(z); @@ -2246,7 +2070,7 @@ __forceinline static unsigned int zreceive(zbuf *z, int n) return k; } -__forceinline static int zhuffman_decode(zbuf *a, zhuffman *z) +stbi_inline static int zhuffman_decode(zbuf *a, zhuffman *z) { int b,s,k; if (a->num_bits < 16) fill_bits(a); @@ -2582,13 +2406,13 @@ static int check_png_header(stbi *s) static uint8 png_sig[8] = { 137,80,78,71,13,10,26,10 }; int i; for (i=0; i < 8; ++i) - if (get8(s) != png_sig[i]) return e("bad png sig","Not a PNG"); + if (get8u(s) != png_sig[i]) return e("bad png sig","Not a PNG"); return 1; } typedef struct { - stbi s; + stbi *s; uint8 *idata, *expanded, *out; } png; @@ -2617,7 +2441,7 @@ static int paeth(int a, int b, int c) // create the png data from post-deflated data static int create_png_image_raw(png *a, uint8 *raw, uint32 raw_len, int out_n, uint32 x, uint32 y) { - stbi *s = &a->s; + stbi *s = a->s; uint32 i,j,stride = x*out_n; int k; int img_n = s->img_n; // copy it into a local for later @@ -2698,12 +2522,12 @@ static int create_png_image(png *a, uint8 *raw, uint32 raw_len, int out_n, int i int p; int save; if (!interlaced) - return create_png_image_raw(a, raw, raw_len, out_n, a->s.img_x, a->s.img_y); + return create_png_image_raw(a, raw, raw_len, out_n, a->s->img_x, a->s->img_y); save = stbi_png_partial; stbi_png_partial = 0; // de-interlacing - final = (uint8 *) malloc(a->s.img_x * a->s.img_y * out_n); + final = (uint8 *) malloc(a->s->img_x * a->s->img_y * out_n); for (p=0; p < 7; ++p) { int xorig[] = { 0,4,0,2,0,1,0 }; int yorig[] = { 0,0,4,0,2,0,1 }; @@ -2711,8 +2535,8 @@ static int create_png_image(png *a, uint8 *raw, uint32 raw_len, int out_n, int i 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]; + 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) { if (!create_png_image_raw(a, raw, raw_len, out_n, x, y)) { free(final); @@ -2720,7 +2544,7 @@ static int create_png_image(png *a, uint8 *raw, uint32 raw_len, int out_n, int i } for (j=0; j < y; ++j) for (i=0; i < x; ++i) - memcpy(final + (j*yspc[p]+yorig[p])*a->s.img_x*out_n + (i*xspc[p]+xorig[p])*out_n, + memcpy(final + (j*yspc[p]+yorig[p])*a->s->img_x*out_n + (i*xspc[p]+xorig[p])*out_n, a->out + (j*x+i)*out_n, out_n); free(a->out); raw += (x*out_n+1)*y; @@ -2735,7 +2559,7 @@ static int create_png_image(png *a, uint8 *raw, uint32 raw_len, int out_n, int i static int compute_transparency(png *z, uint8 tc[3], int out_n) { - stbi *s = &z->s; + stbi *s = z->s; uint32 i, pixel_count = s->img_x * s->img_y; uint8 *p = z->out; @@ -2760,7 +2584,7 @@ static int compute_transparency(png *z, uint8 tc[3], int out_n) static int expand_palette(png *a, uint8 *palette, int len, int pal_img_n) { - uint32 i, pixel_count = a->s.img_x * a->s.img_y; + uint32 i, pixel_count = a->s->img_x * a->s->img_y; uint8 *p, *temp_out, *orig = a->out; p = (uint8 *) malloc(pixel_count * pal_img_n); @@ -2809,7 +2633,7 @@ void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert) static void stbi_de_iphone(png *z) { - stbi *s = &z->s; + stbi *s = z->s; uint32 i, pixel_count = s->img_x * s->img_y; uint8 *p = z->out; @@ -2855,7 +2679,11 @@ static int parse_png_file(png *z, int scan, int req_comp) uint8 has_trans=0, tc[3]; uint32 ioff=0, idata_limit=0, i, pal_len=0; int first=1,k,interlace=0, iphone=0; - stbi *s = &z->s; + stbi *s = z->s; + + z->expanded = NULL; + z->idata = NULL; + z->out = NULL; if (!check_png_header(s)) return 0; @@ -3001,21 +2829,18 @@ static int parse_png_file(png *z, int scan, int req_comp) static unsigned char *do_png(png *p, int *x, int *y, int *n, int req_comp) { unsigned char *result=NULL; - p->expanded = NULL; - p->idata = NULL; - p->out = NULL; if (req_comp < 0 || req_comp > 4) return epuc("bad req_comp", "Internal error"); if (parse_png_file(p, SCAN_load, req_comp)) { result = p->out; p->out = NULL; - if (req_comp && req_comp != p->s.img_out_n) { - result = convert_format(result, p->s.img_out_n, req_comp, p->s.img_x, p->s.img_y); - p->s.img_out_n = req_comp; + if (req_comp && req_comp != p->s->img_out_n) { + result = convert_format(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; + *x = p->s->img_x; + *y = p->s->img_y; + if (n) *n = p->s->img_n; } free(p->out); p->out = NULL; free(p->expanded); p->expanded = NULL; @@ -3024,89 +2849,35 @@ static unsigned char *do_png(png *p, int *x, int *y, int *n, int req_comp) return result; } -#ifndef STBI_NO_STDIO -unsigned char *stbi_png_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) +static unsigned char *stbi_png_load(stbi *s, int *x, int *y, int *comp, int req_comp) { png p; - start_file(&p.s, f); + p.s = s; return do_png(&p, x,y,comp,req_comp); } -unsigned char *stbi_png_load(char const *filename, int *x, int *y, int *comp, int req_comp) +static int stbi_png_test(stbi *s) { - unsigned char *data; - FILE *f = fopen(filename, "rb"); - if (!f) return NULL; - data = stbi_png_load_from_file(f,x,y,comp,req_comp); - fclose(f); - return data; -} -#endif - -unsigned char *stbi_png_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) -{ - png p; - start_mem(&p.s, buffer,len); - return do_png(&p, x,y,comp,req_comp); -} - -#ifndef STBI_NO_STDIO -int stbi_png_test_file(FILE *f) -{ - png p; - int n,r; - n = ftell(f); - start_file(&p.s, f); - r = parse_png_file(&p, SCAN_type,STBI_default); - fseek(f,n,SEEK_SET); + int r; + r = check_png_header(s); + stbi_rewind(s); return r; } -#endif - -int stbi_png_test_memory(stbi_uc const *buffer, int len) -{ - png p; - start_mem(&p.s, buffer, len); - return parse_png_file(&p, SCAN_type,STBI_default); -} static int stbi_png_info_raw(png *p, int *x, int *y, int *comp) { if (!parse_png_file(p, SCAN_header, 0)) return 0; - if (x) *x = p->s.img_x; - if (y) *y = p->s.img_y; - if (comp) *comp = p->s.img_n; + if (x) *x = p->s->img_x; + if (y) *y = p->s->img_y; + if (comp) *comp = p->s->img_n; return 1; } -#ifndef STBI_NO_STDIO -int stbi_png_info (char const *filename, int *x, int *y, int *comp) -{ - int res; - FILE *f = fopen(filename, "rb"); - if (!f) return 0; - res = stbi_png_info_from_file(f, x, y, comp); - fclose(f); - return res; -} - -int stbi_png_info_from_file(FILE *f, int *x, int *y, int *comp) +static int stbi_png_info(stbi *s, int *x, int *y, int *comp) { png p; - int res; - long n = ftell(f); - start_file(&p.s, f); - res = stbi_png_info_raw(&p, x, y, comp); - fseek(f, n, SEEK_SET); - return res; -} -#endif // !STBI_NO_STDIO - -int stbi_png_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp) -{ - png p; - start_mem(&p.s, buffer, len); + p.s = s; return stbi_png_info_raw(&p, x, y, comp); } @@ -3126,24 +2897,13 @@ static int bmp_test(stbi *s) return 0; } -#ifndef STBI_NO_STDIO -int stbi_bmp_test_file (FILE *f) +static int stbi_bmp_test(stbi *s) { - stbi s; - int r,n = ftell(f); - start_file(&s,f); - r = bmp_test(&s); - fseek(f,n,SEEK_SET); + int r = bmp_test(s); + stbi_rewind(s); return r; } -#endif -int stbi_bmp_test_memory (stbi_uc const *buffer, int len) -{ - stbi s; - start_mem(&s, buffer, len); - return bmp_test(&s); -} // returns 0..31 for the highest set bit static int high_bit(unsigned int z) @@ -3322,11 +3082,11 @@ static stbi_uc *bmp_load(stbi *s, int *x, int *y, int *comp, int req_comp) if (bpp == 24) { easy = 1; } else if (bpp == 32) { - if (mb == 0xff && mg == 0xff00 && mr == 0xff000000 && ma == 0xff000000) + if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000) easy = 2; } if (!easy) { - if (!mr || !mg || !mb) return epuc("bad masks", "Corrupt BMP"); + if (!mr || !mg || !mb) { free(out); return epuc("bad masks", "Corrupt BMP"); } // right shift amt to put high bit in position #7 rshift = high_bit(mr)-7; rcount = bitcount(mr); gshift = high_bit(mg)-7; gcount = bitcount(mr); @@ -3376,35 +3136,15 @@ static stbi_uc *bmp_load(stbi *s, int *x, int *y, int *comp, int req_comp) *x = s->img_x; *y = s->img_y; - if (comp) *comp = target; + if (comp) *comp = s->img_n; return out; } -#ifndef STBI_NO_STDIO -stbi_uc *stbi_bmp_load (char const *filename, int *x, int *y, int *comp, int req_comp) +static stbi_uc *stbi_bmp_load(stbi *s,int *x, int *y, int *comp, int req_comp) { - stbi_uc *data; - FILE *f = fopen(filename, "rb"); - if (!f) return NULL; - data = stbi_bmp_load_from_file(f, x,y,comp,req_comp); - fclose(f); - return data; + return bmp_load(s, x,y,comp,req_comp); } -stbi_uc *stbi_bmp_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp) -{ - stbi s; - start_file(&s, f); - return bmp_load(&s, x,y,comp,req_comp); -} -#endif - -stbi_uc *stbi_bmp_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) -{ - stbi s; - start_mem(&s, buffer, len); - return bmp_load(&s, x,y,comp,req_comp); -} // Targa Truevision - TGA // by Jonathan Dummer @@ -3438,24 +3178,9 @@ static int tga_info(stbi *s, int *x, int *y, int *comp) return 1; // seems to have passed everything } -#ifndef STBI_NO_STDIO -int stbi_tga_info_from_file(FILE *f, int *x, int *y, int *comp) +int stbi_tga_info(stbi *s, int *x, int *y, int *comp) { - stbi s; - int r; - long n = ftell(f); - start_file(&s, f); - r = tga_info(&s, x, y, comp); - fseek(f, n, SEEK_SET); - return r; -} -#endif - -int stbi_tga_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp) -{ - stbi s; - start_mem(&s, buffer, len); - return tga_info(&s, x, y, comp); + return tga_info(s, x, y, comp); } static int tga_test(stbi *s) @@ -3478,23 +3203,11 @@ static int tga_test(stbi *s) return 1; // seems to have passed everything } -#ifndef STBI_NO_STDIO -int stbi_tga_test_file (FILE *f) +static int stbi_tga_test(stbi *s) { - stbi s; - int r,n = ftell(f); - start_file(&s, f); - r = tga_test(&s); - fseek(f,n,SEEK_SET); - return r; -} -#endif - -int stbi_tga_test_memory (stbi_uc const *buffer, int len) -{ - stbi s; - start_mem(&s, buffer, len); - return tga_test(&s); + int res = tga_test(s); + stbi_rewind(s); + return res; } static stbi_uc *tga_load(stbi *s, int *x, int *y, int *comp, int req_comp) @@ -3540,7 +3253,7 @@ static stbi_uc *tga_load(stbi *s, int *x, int *y, int *comp, int req_comp) (tga_bits_per_pixel != 24) && (tga_bits_per_pixel != 32)) ) { - return NULL; + return NULL; // we don't report this as a bad TGA because we don't even know if it's TGA } // If I'm paletted, then I'll use the number of bits from the palette @@ -3563,6 +3276,7 @@ static stbi_uc *tga_load(stbi *s, int *x, int *y, int *comp, int req_comp) *comp = tga_bits_per_pixel/8; } tga_data = (unsigned char*)malloc( tga_width * tga_height * req_comp ); + if (!tga_data) return epuc("outofmem", "Out of memory"); // skip to the data's starting position (offset usually = 0) skip(s, tga_offset ); @@ -3573,8 +3287,12 @@ static stbi_uc *tga_load(stbi *s, int *x, int *y, int *comp, int req_comp) skip(s, tga_palette_start ); // load the palette tga_palette = (unsigned char*)malloc( tga_palette_len * tga_palette_bits / 8 ); - if (!getn(s, tga_palette, tga_palette_len * tga_palette_bits / 8 )) - return NULL; + if (!tga_palette) return epuc("outofmem", "Out of memory"); + if (!getn(s, tga_palette, tga_palette_len * tga_palette_bits / 8 )) { + free(tga_data); + free(tga_palette); + return epuc("bad palette", "Corrupt TGA"); + } } // load the data trans_data[0] = trans_data[1] = trans_data[2] = trans_data[3] = 0; @@ -3718,30 +3436,9 @@ static stbi_uc *tga_load(stbi *s, int *x, int *y, int *comp, int req_comp) return tga_data; } -#ifndef STBI_NO_STDIO -stbi_uc *stbi_tga_load (char const *filename, int *x, int *y, int *comp, int req_comp) +static stbi_uc *stbi_tga_load(stbi *s, int *x, int *y, int *comp, int req_comp) { - stbi_uc *data; - FILE *f = fopen(filename, "rb"); - if (!f) return NULL; - data = stbi_tga_load_from_file(f, x,y,comp,req_comp); - fclose(f); - return data; -} - -stbi_uc *stbi_tga_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp) -{ - stbi s; - start_file(&s, f); - return tga_load(&s, x,y,comp,req_comp); -} -#endif - -stbi_uc *stbi_tga_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) -{ - stbi s; - start_mem(&s, buffer, len); - return tga_load(&s, x,y,comp,req_comp); + return tga_load(s,x,y,comp,req_comp); } @@ -3754,24 +3451,12 @@ static int psd_test(stbi *s) else return 1; } -#ifndef STBI_NO_STDIO -int stbi_psd_test_file(FILE *f) +static int stbi_psd_test(stbi *s) { - stbi s; - int r,n = ftell(f); - start_file(&s, f); - r = psd_test(&s); - fseek(f,n,SEEK_SET); + int r = psd_test(s); + stbi_rewind(s); return r; } -#endif - -int stbi_psd_test_memory(stbi_uc const *buffer, int len) -{ - stbi s; - start_mem(&s, buffer, len); - return psd_test(&s); -} static stbi_uc *psd_load(stbi *s, int *x, int *y, int *comp, int req_comp) { @@ -3931,30 +3616,9 @@ static stbi_uc *psd_load(stbi *s, int *x, int *y, int *comp, int req_comp) return out; } -#ifndef STBI_NO_STDIO -stbi_uc *stbi_psd_load(char const *filename, int *x, int *y, int *comp, int req_comp) +static stbi_uc *stbi_psd_load(stbi *s, int *x, int *y, int *comp, int req_comp) { - stbi_uc *data; - FILE *f = fopen(filename, "rb"); - if (!f) return NULL; - data = stbi_psd_load_from_file(f, x,y,comp,req_comp); - fclose(f); - return data; -} - -stbi_uc *stbi_psd_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) -{ - stbi s; - start_file(&s, f); - return psd_load(&s, x,y,comp,req_comp); -} -#endif - -stbi_uc *stbi_psd_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) -{ - stbi s; - start_mem(&s, buffer, len); - return psd_load(&s, x,y,comp,req_comp); + return psd_load(s,x,y,comp,req_comp); } // ************************************************************************************************* @@ -4162,50 +3826,18 @@ static stbi_uc *pic_load(stbi *s,int *px,int *py,int *comp,int req_comp) return result; } -int stbi_pic_test_memory(stbi_uc const *buffer, int len) +static int stbi_pic_test(stbi *s) { - stbi s; - start_mem(&s,buffer,len); - return pic_test(&s); + int r = pic_test(s); + stbi_rewind(s); + return r; } -stbi_uc *stbi_pic_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +static stbi_uc *stbi_pic_load(stbi *s, int *x, int *y, int *comp, int req_comp) { - stbi s; - start_mem(&s,buffer,len); - return pic_load(&s,x,y,comp,req_comp); + return pic_load(s,x,y,comp,req_comp); } -#ifndef STBI_NO_STDIO -int stbi_pic_test_file(FILE *f) -{ - int result; - long l = ftell(f); - stbi s; - start_file(&s,f); - result = pic_test(&s); - fseek(f,l,SEEK_SET); - return result; -} - -stbi_uc *stbi_pic_load(char const *filename,int *x, int *y, int *comp, int req_comp) -{ - stbi_uc *result; - FILE *f=fopen(filename,"rb"); - if (!f) return 0; - result = stbi_pic_load_from_file(f,x,y,comp,req_comp); - fclose(f); - return result; -} - -stbi_uc *stbi_pic_load_from_file(FILE *f,int *x, int *y, int *comp, int req_comp) -{ - stbi s; - start_file(&s,f); - return pic_load(&s,x,y,comp,req_comp); -} -#endif - // ************************************************************************************************* // GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb typedef struct stbi_gif_lzw_struct { @@ -4241,24 +3873,12 @@ static int gif_test(stbi *s) return 1; } -#ifndef STBI_NO_STDIO -int stbi_gif_test_file (FILE *f) +static int stbi_gif_test(stbi *s) { - stbi s; - int r,n = ftell(f); - start_file(&s,f); - r = gif_test(&s); - fseek(f,n,SEEK_SET); + int r = gif_test(s); + stbi_rewind(s); return r; } -#endif - -int stbi_gif_test_memory (stbi_uc const *buffer, int len) -{ - stbi s; - start_mem(&s, buffer, len); - return gif_test(&s); -} static void stbi_gif_parse_colortable(stbi *s, uint8 pal[256][4], int num_entries, int transp) { @@ -4536,25 +4156,12 @@ static uint8 *stbi_gif_load_next(stbi *s, stbi_gif *g, int *comp, int req_comp) } } -#ifndef STBI_NO_STDIO -stbi_uc *stbi_gif_load (char const *filename, int *x, int *y, int *comp, int req_comp) -{ - uint8 *data; - FILE *f = fopen(filename, "rb"); - if (!f) return NULL; - data = stbi_gif_load_from_file(f, x,y,comp,req_comp); - fclose(f); - return data; -} - -stbi_uc *stbi_gif_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp) +static stbi_uc *stbi_gif_load(stbi *s, int *x, int *y, int *comp, int req_comp) { uint8 *u = 0; - stbi s; stbi_gif g={0}; - start_file(&s, f); - u = stbi_gif_load_next(&s, &g, comp, req_comp); + u = stbi_gif_load_next(s, &g, comp, req_comp); if (u == (void *) 1) u = 0; // end of animated gif marker if (u) { *x = g.w; @@ -4563,55 +4170,12 @@ stbi_uc *stbi_gif_load_from_file (FILE *f, int *x, int *y, int *comp, int req_ return u; } -#endif -stbi_uc *stbi_gif_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +static int stbi_gif_info(stbi *s, int *x, int *y, int *comp) { - uint8 *u = 0; - stbi s; - stbi_gif g={0}; - start_mem(&s, buffer, len); - u = stbi_gif_load_next(&s, &g, comp, req_comp); - if (u == (void *) 1) u = 0; // end of animated gif marker - if (u) { - *x = g.w; - *y = g.h; - } - return u; + return stbi_gif_info_raw(s,x,y,comp); } -#ifndef STBI_NO_STDIO -int stbi_gif_info (char const *filename, int *x, int *y, int *comp) -{ - int res; - FILE *f = fopen(filename, "rb"); - if (!f) return 0; - res = stbi_gif_info_from_file(f, x, y, comp); - fclose(f); - return res; -} - -int stbi_gif_info_from_file(FILE *f, int *x, int *y, int *comp) -{ - stbi s; - int res; - long n = ftell(f); - start_file(&s, f); - res = stbi_gif_info_raw(&s, x, y, comp); - fseek(f, n, SEEK_SET); - return res; -} -#endif // !STBI_NO_STDIO - -int stbi_gif_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp) -{ - stbi s; - start_mem(&s, buffer, len); - return stbi_gif_info_raw(&s, x, y, comp); -} - - - // ************************************************************************************************* // Radiance RGBE HDR loader @@ -4627,24 +4191,12 @@ static int hdr_test(stbi *s) return 1; } -int stbi_hdr_test_memory(stbi_uc const *buffer, int len) +static int stbi_hdr_test(stbi* s) { - stbi s; - start_mem(&s, buffer, len); - return hdr_test(&s); -} - -#ifndef STBI_NO_STDIO -int stbi_hdr_test_file(FILE *f) -{ - stbi s; - int r,n = ftell(f); - start_file(&s, f); - r = hdr_test(&s); - fseek(f,n,SEEK_SET); + int r = hdr_test(s); + stbi_rewind(s); return r; } -#endif #define HDR_BUFLEN 1024 static char *hdr_gettoken(stbi *z, char *buffer) @@ -4696,7 +4248,6 @@ static void hdr_convert(float *output, stbi_uc *input, int req_comp) } } - static float *hdr_load(stbi *s, int *x, int *y, int *comp, int req_comp) { char buffer[HDR_BUFLEN]; @@ -4808,24 +4359,31 @@ static float *hdr_load(stbi *s, int *x, int *y, int *comp, int req_comp) return hdr_data; } -#ifndef STBI_NO_STDIO -float *stbi_hdr_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) +static float *stbi_hdr_load(stbi *s, int *x, int *y, int *comp, int req_comp) { - stbi s; - start_file(&s,f); - return hdr_load(&s,x,y,comp,req_comp); -} -#endif - -float *stbi_hdr_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) -{ - stbi s; - start_mem(&s,buffer, len); - return hdr_load(&s,x,y,comp,req_comp); + return hdr_load(s,x,y,comp,req_comp); } #endif // STBI_NO_HDR +static int stbi_info_main(stbi *s, int *x, int *y, int *comp) +{ + if (stbi_jpeg_info(s, x, y, comp)) + return 1; + if (stbi_png_info(s, x, y, comp)) + return 1; + if (stbi_gif_info(s, x, y, comp)) + return 1; + // @TODO: stbi_bmp_info + // @TODO: stbi_psd_info + #ifndef STBI_NO_HDR + // @TODO: stbi_hdr_info + #endif + // test tga last because it's a crappy test! + if (stbi_tga_info(s, x, y, comp)) + return 1; + return e("unknown image type", "Image not of any known type, or corrupt"); +} #ifndef STBI_NO_STDIO int stbi_info(char const *filename, int *x, int *y, int *comp) @@ -4840,49 +4398,46 @@ int stbi_info(char const *filename, int *x, int *y, int *comp) int stbi_info_from_file(FILE *f, int *x, int *y, int *comp) { - if (stbi_jpeg_info_from_file(f, x, y, comp)) - return 1; - if (stbi_png_info_from_file(f, x, y, comp)) - return 1; - if (stbi_gif_info_from_file(f, x, y, comp)) - return 1; - // @TODO: stbi_bmp_info_from_file - // @TODO: stbi_psd_info_from_file - #ifndef STBI_NO_HDR - // @TODO: stbi_hdr_info_from_file - #endif - // test tga last because it's a crappy test! - if (stbi_tga_info_from_file(f, x, y, comp)) - return 1; - return e("unknown image type", "Image not of any known type, or corrupt"); + int r; + stbi s; + long pos = ftell(f); + start_file(&s, f); + r = stbi_info_main(&s,x,y,comp); + fseek(f,pos,SEEK_SET); + return r; } #endif // !STBI_NO_STDIO int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp) { - if (stbi_jpeg_info_from_memory(buffer, len, x, y, comp)) - return 1; - if (stbi_png_info_from_memory(buffer, len, x, y, comp)) - return 1; - if (stbi_gif_info_from_memory(buffer, len, x, y, comp)) - return 1; - // @TODO: stbi_bmp_info_from_memory - // @TODO: stbi_psd_info_from_memory - #ifndef STBI_NO_HDR - // @TODO: stbi_hdr_info_from_memory - #endif - // test tga last because it's a crappy test! - if (stbi_tga_info_from_memory(buffer, len, x, y, comp)) - return 1; - return e("unknown image type", "Image not of any known type, or corrupt"); + stbi s; + start_mem(&s,buffer,len); + return stbi_info_main(&s,x,y,comp); +} + +int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp) +{ + stbi s; + start_callbacks(&s, (stbi_io_callbacks *) c, user); + return stbi_info_main(&s,x,y,comp); } #endif // STBI_HEADER_FILE_ONLY /* revision history: - 1.29 (2010-08-16) various warning fixes from Aurelien Pocheville - 1.28 (2010-08-01) fix bug in GIF palette transparency (SpartanJ) + 1.31 (2011-06-19) + 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-uint8 to fix warnings 1.26 (2010-07-24) @@ -4896,7 +4451,6 @@ int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *c attempt to fix trans_data warning (Won Chun) 1.23 fixed bug in iPhone support 1.22 (2010-07-10) - removed image *writing* support removed image *writing* support stbi_info support from Jetro Lauha GIF support from Jean-Marc Lienher @@ -4942,8 +4496,7 @@ int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *c 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 + 0.57 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' @@ -4951,4 +4504,5 @@ int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *c 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 first released version */