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stb_image.h: Update to v2.27
This commit is contained in:
Joel16
parent
977ea941fe
commit
be498ccad4
@ -1,4 +1,4 @@
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/* stb_image - v2.26 - public domain image loader - http://nothings.org/stb
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/* stb_image - v2.27 - public domain image loader - http://nothings.org/stb
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no warranty implied; use at your own risk
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Do this:
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@ -48,6 +48,7 @@ LICENSE
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RECENT REVISION HISTORY:
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2.27 (2021-07-11) document stbi_info better, 16-bit PNM support, bug fixes
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2.26 (2020-07-13) many minor fixes
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2.25 (2020-02-02) fix warnings
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2.24 (2020-02-02) fix warnings; thread-local failure_reason and flip_vertically
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@ -89,7 +90,7 @@ RECENT REVISION HISTORY:
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Jeremy Sawicki (handle all ImageNet JPGs)
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Optimizations & bugfixes Mikhail Morozov (1-bit BMP)
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Fabian "ryg" Giesen Anael Seghezzi (is-16-bit query)
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Arseny Kapoulkine
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Arseny Kapoulkine Simon Breuss (16-bit PNM)
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John-Mark Allen
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Carmelo J Fdez-Aguera
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@ -102,7 +103,7 @@ RECENT REVISION HISTORY:
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Thomas Ruf Ronny Chevalier github:rlyeh
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Janez Zemva John Bartholomew Michal Cichon github:romigrou
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Jonathan Blow Ken Hamada Tero Hanninen github:svdijk
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Laurent Gomila Cort Stratton github:snagar
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Eugene Golushkov Laurent Gomila Cort Stratton github:snagar
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Aruelien Pocheville Sergio Gonzalez Thibault Reuille github:Zelex
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Cass Everitt Ryamond Barbiero github:grim210
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Paul Du Bois Engin Manap Aldo Culquicondor github:sammyhw
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@ -110,11 +111,13 @@ RECENT REVISION HISTORY:
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Josh Tobin Matthew Gregan github:poppolopoppo
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Julian Raschke Gregory Mullen Christian Floisand github:darealshinji
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Baldur Karlsson Kevin Schmidt JR Smith github:Michaelangel007
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Brad Weinberger Matvey Cherevko [reserved]
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Brad Weinberger Matvey Cherevko github:mosra
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Luca Sas Alexander Veselov Zack Middleton [reserved]
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Ryan C. Gordon [reserved] [reserved]
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DO NOT ADD YOUR NAME HERE
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Jacko Dirks
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To add your name to the credits, pick a random blank space in the middle and fill it.
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80% of merge conflicts on stb PRs are due to people adding their name at the end
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of the credits.
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@ -176,6 +179,32 @@ RECENT REVISION HISTORY:
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//
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// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized.
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//
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// To query the width, height and component count of an image without having to
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// decode the full file, you can use the stbi_info family of functions:
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//
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// int x,y,n,ok;
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// ok = stbi_info(filename, &x, &y, &n);
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// // returns ok=1 and sets x, y, n if image is a supported format,
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// // 0 otherwise.
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//
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// Note that stb_image pervasively uses ints in its public API for sizes,
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// including sizes of memory buffers. This is now part of the API and thus
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// hard to change without causing breakage. As a result, the various image
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// loaders all have certain limits on image size; these differ somewhat
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// by format but generally boil down to either just under 2GB or just under
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// 1GB. When the decoded image would be larger than this, stb_image decoding
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// will fail.
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//
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// Additionally, stb_image will reject image files that have any of their
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// dimensions set to a larger value than the configurable STBI_MAX_DIMENSIONS,
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// which defaults to 2**24 = 16777216 pixels. Due to the above memory limit,
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// the only way to have an image with such dimensions load correctly
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// is for it to have a rather extreme aspect ratio. Either way, the
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// assumption here is that such larger images are likely to be malformed
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// or malicious. If you do need to load an image with individual dimensions
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// larger than that, and it still fits in the overall size limit, you can
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// #define STBI_MAX_DIMENSIONS on your own to be something larger.
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//
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// ===========================================================================
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//
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// UNICODE:
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@ -281,11 +310,10 @@ RECENT REVISION HISTORY:
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//
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// iPhone PNG support:
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//
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// By default we convert iphone-formatted PNGs back to RGB, even though
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// they are internally encoded differently. You can disable this conversion
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// by calling stbi_convert_iphone_png_to_rgb(0), in which case
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// you will always just get the native iphone "format" through (which
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// is BGR stored in RGB).
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// We optionally support converting iPhone-formatted PNGs (which store
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// premultiplied BGRA) back to RGB, even though they're internally encoded
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// differently. To enable this conversion, call
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// stbi_convert_iphone_png_to_rgb(1).
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//
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// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per
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// pixel to remove any premultiplied alpha *only* if the image file explicitly
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@ -489,6 +517,8 @@ STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip);
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// as above, but only applies to images loaded on the thread that calls the function
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// this function is only available if your compiler supports thread-local variables;
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// calling it will fail to link if your compiler doesn't
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STBIDEF void stbi_set_unpremultiply_on_load_thread(int flag_true_if_should_unpremultiply);
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STBIDEF void stbi_convert_iphone_png_to_rgb_thread(int flag_true_if_should_convert);
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STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip);
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// ZLIB client - used by PNG, available for other purposes
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@ -634,7 +664,7 @@ typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1];
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#ifdef STBI_HAS_LROTL
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#define stbi_lrot(x,y) _lrotl(x,y)
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#else
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#define stbi_lrot(x,y) (((x) << (y)) | ((x) >> (32 - (y))))
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#define stbi_lrot(x,y) (((x) << (y)) | ((x) >> (-(y) & 31)))
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#endif
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#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED))
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@ -748,9 +778,12 @@ static int stbi__sse2_available(void)
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#ifdef STBI_NEON
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#include <arm_neon.h>
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// assume GCC or Clang on ARM targets
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#ifdef _MSC_VER
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#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name
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#else
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#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
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#endif
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#endif
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#ifndef STBI_SIMD_ALIGN
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#define STBI_SIMD_ALIGN(type, name) type name
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@ -924,6 +957,7 @@ static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp);
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static int stbi__pnm_test(stbi__context *s);
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static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
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static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp);
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static int stbi__pnm_is16(stbi__context *s);
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#endif
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static
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@ -998,7 +1032,7 @@ static int stbi__mad3sizes_valid(int a, int b, int c, int add)
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}
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// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow
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#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
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#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) || !defined(STBI_NO_PNM)
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static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add)
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{
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return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) &&
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@ -1021,7 +1055,7 @@ static void *stbi__malloc_mad3(int a, int b, int c, int add)
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return stbi__malloc(a*b*c + add);
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}
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#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
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#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) || !defined(STBI_NO_PNM)
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static void *stbi__malloc_mad4(int a, int b, int c, int d, int add)
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{
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if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL;
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@ -1087,9 +1121,8 @@ static void *stbi__load_main(stbi__context *s, int *x, int *y, int *comp, int re
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ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order
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ri->num_channels = 0;
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#ifndef STBI_NO_JPEG
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if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp, ri);
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#endif
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// test the formats with a very explicit header first (at least a FOURCC
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// or distinctive magic number first)
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#ifndef STBI_NO_PNG
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if (stbi__png_test(s)) return stbi__png_load(s,x,y,comp,req_comp, ri);
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#endif
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@ -1107,6 +1140,13 @@ static void *stbi__load_main(stbi__context *s, int *x, int *y, int *comp, int re
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#ifndef STBI_NO_PIC
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if (stbi__pic_test(s)) return stbi__pic_load(s,x,y,comp,req_comp, ri);
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#endif
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// then the formats that can end up attempting to load with just 1 or 2
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// bytes matching expectations; these are prone to false positives, so
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// try them later
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#ifndef STBI_NO_JPEG
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if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp, ri);
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#endif
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#ifndef STBI_NO_PNM
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if (stbi__pnm_test(s)) return stbi__pnm_load(s,x,y,comp,req_comp, ri);
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#endif
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@ -1262,12 +1302,12 @@ static void stbi__float_postprocess(float *result, int *x, int *y, int *comp, in
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#ifndef STBI_NO_STDIO
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#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
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#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8)
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STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide);
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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);
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#endif
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#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
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#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8)
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STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input)
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{
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return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int) bufferlen, NULL, NULL);
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@ -1277,16 +1317,16 @@ STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wch
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static FILE *stbi__fopen(char const *filename, char const *mode)
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{
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FILE *f;
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#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
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#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8)
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wchar_t wMode[64];
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wchar_t wFilename[1024];
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if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename)))
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if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename)/sizeof(*wFilename)))
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return 0;
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if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode)))
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if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode)/sizeof(*wMode)))
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return 0;
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#if _MSC_VER >= 1400
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#if defined(_MSC_VER) && _MSC_VER >= 1400
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if (0 != _wfopen_s(&f, wFilename, wMode))
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f = 0;
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#else
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@ -1662,7 +1702,8 @@ static int stbi__get16le(stbi__context *s)
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static stbi__uint32 stbi__get32le(stbi__context *s)
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{
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stbi__uint32 z = stbi__get16le(s);
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return z + (stbi__get16le(s) << 16);
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z += (stbi__uint32)stbi__get16le(s) << 16;
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return z;
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}
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#endif
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@ -2090,13 +2131,12 @@ stbi_inline static int stbi__extend_receive(stbi__jpeg *j, int n)
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int sgn;
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if (j->code_bits < n) stbi__grow_buffer_unsafe(j);
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sgn = (stbi__int32)j->code_buffer >> 31; // sign bit is always in MSB
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sgn = j->code_buffer >> 31; // sign bit always in MSB; 0 if MSB clear (positive), 1 if MSB set (negative)
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k = stbi_lrot(j->code_buffer, n);
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if (n < 0 || n >= (int) (sizeof(stbi__bmask)/sizeof(*stbi__bmask))) return 0;
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j->code_buffer = k & ~stbi__bmask[n];
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k &= stbi__bmask[n];
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j->code_bits -= n;
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return k + (stbi__jbias[n] & ~sgn);
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return k + (stbi__jbias[n] & (sgn - 1));
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}
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// get some unsigned bits
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@ -2146,7 +2186,7 @@ static int stbi__jpeg_decode_block(stbi__jpeg *j, short data[64], stbi__huffman
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if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
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t = stbi__jpeg_huff_decode(j, hdc);
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if (t < 0) return stbi__err("bad huffman code","Corrupt JPEG");
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if (t < 0 || t > 15) return stbi__err("bad huffman code","Corrupt JPEG");
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// 0 all the ac values now so we can do it 32-bits at a time
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memset(data,0,64*sizeof(data[0]));
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@ -2203,12 +2243,12 @@ static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg *j, short data[64], stbi__
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// first scan for DC coefficient, must be first
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memset(data,0,64*sizeof(data[0])); // 0 all the ac values now
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t = stbi__jpeg_huff_decode(j, hdc);
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if (t == -1) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
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if (t < 0 || t > 15) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
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diff = t ? stbi__extend_receive(j, t) : 0;
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dc = j->img_comp[b].dc_pred + diff;
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j->img_comp[b].dc_pred = dc;
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data[0] = (short) (dc << j->succ_low);
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data[0] = (short) (dc * (1 << j->succ_low));
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} else {
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// refinement scan for DC coefficient
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if (stbi__jpeg_get_bit(j))
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@ -2245,7 +2285,7 @@ static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg *j, short data[64], stbi__
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j->code_buffer <<= s;
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j->code_bits -= s;
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zig = stbi__jpeg_dezigzag[k++];
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data[zig] = (short) ((r >> 8) << shift);
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data[zig] = (short) ((r >> 8) * (1 << shift));
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} else {
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int rs = stbi__jpeg_huff_decode(j, hac);
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if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
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@ -2263,7 +2303,7 @@ static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg *j, short data[64], stbi__
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} else {
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k += r;
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zig = stbi__jpeg_dezigzag[k++];
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data[zig] = (short) (stbi__extend_receive(j,s) << shift);
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data[zig] = (short) (stbi__extend_receive(j,s) * (1 << shift));
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}
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}
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} while (k <= j->spec_end);
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@ -3227,6 +3267,13 @@ static int stbi__process_frame_header(stbi__jpeg *z, int scan)
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if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v;
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}
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// check that plane subsampling factors are integer ratios; our resamplers can't deal with fractional ratios
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// and I've never seen a non-corrupted JPEG file actually use them
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for (i=0; i < s->img_n; ++i) {
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if (h_max % z->img_comp[i].h != 0) return stbi__err("bad H","Corrupt JPEG");
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if (v_max % z->img_comp[i].v != 0) return stbi__err("bad V","Corrupt JPEG");
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}
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// compute interleaved mcu info
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z->img_h_max = h_max;
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z->img_v_max = v_max;
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@ -3782,6 +3829,10 @@ static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp
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else
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decode_n = z->s->img_n;
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// nothing to do if no components requested; check this now to avoid
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// accessing uninitialized coutput[0] later
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if (decode_n <= 0) { stbi__cleanup_jpeg(z); return NULL; }
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// resample and color-convert
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{
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int k;
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@ -3924,6 +3975,7 @@ static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int re
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{
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unsigned char* result;
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stbi__jpeg* j = (stbi__jpeg*) stbi__malloc(sizeof(stbi__jpeg));
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if (!j) return stbi__errpuc("outofmem", "Out of memory");
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STBI_NOTUSED(ri);
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j->s = s;
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stbi__setup_jpeg(j);
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@ -3936,6 +3988,7 @@ static int stbi__jpeg_test(stbi__context *s)
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{
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int r;
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stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg));
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if (!j) return stbi__err("outofmem", "Out of memory");
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j->s = s;
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stbi__setup_jpeg(j);
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r = stbi__decode_jpeg_header(j, STBI__SCAN_type);
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@ -3960,6 +4013,7 @@ static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp)
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{
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int result;
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stbi__jpeg* j = (stbi__jpeg*) (stbi__malloc(sizeof(stbi__jpeg)));
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if (!j) return stbi__err("outofmem", "Out of memory");
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j->s = s;
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result = stbi__jpeg_info_raw(j, x, y, comp);
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STBI_FREE(j);
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@ -3979,6 +4033,7 @@ static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp)
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// fast-way is faster to check than jpeg huffman, but slow way is slower
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#define STBI__ZFAST_BITS 9 // accelerate all cases in default tables
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#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1)
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#define STBI__ZNSYMS 288 // number of symbols in literal/length alphabet
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|
||||
// zlib-style huffman encoding
|
||||
// (jpegs packs from left, zlib from right, so can't share code)
|
||||
@ -3988,8 +4043,8 @@ typedef struct
|
||||
stbi__uint16 firstcode[16];
|
||||
int maxcode[17];
|
||||
stbi__uint16 firstsymbol[16];
|
||||
stbi_uc size[288];
|
||||
stbi__uint16 value[288];
|
||||
stbi_uc size[STBI__ZNSYMS];
|
||||
stbi__uint16 value[STBI__ZNSYMS];
|
||||
} stbi__zhuffman;
|
||||
|
||||
stbi_inline static int stbi__bitreverse16(int n)
|
||||
@ -4120,7 +4175,7 @@ static int stbi__zhuffman_decode_slowpath(stbi__zbuf *a, stbi__zhuffman *z)
|
||||
if (s >= 16) return -1; // invalid code!
|
||||
// code size is s, so:
|
||||
b = (k >> (16-s)) - z->firstcode[s] + z->firstsymbol[s];
|
||||
if (b >= sizeof (z->size)) return -1; // some data was corrupt somewhere!
|
||||
if (b >= STBI__ZNSYMS) return -1; // some data was corrupt somewhere!
|
||||
if (z->size[b] != s) return -1; // was originally an assert, but report failure instead.
|
||||
a->code_buffer >>= s;
|
||||
a->num_bits -= s;
|
||||
@ -4317,7 +4372,7 @@ static int stbi__parse_zlib_header(stbi__zbuf *a)
|
||||
return 1;
|
||||
}
|
||||
|
||||
static const stbi_uc stbi__zdefault_length[288] =
|
||||
static const stbi_uc stbi__zdefault_length[STBI__ZNSYMS] =
|
||||
{
|
||||
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
|
||||
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
|
||||
@ -4363,7 +4418,7 @@ static int stbi__parse_zlib(stbi__zbuf *a, int parse_header)
|
||||
} 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_length , stbi__zdefault_length , STBI__ZNSYMS)) return 0;
|
||||
if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance, 32)) return 0;
|
||||
} else {
|
||||
if (!stbi__compute_huffman_codes(a)) return 0;
|
||||
@ -4759,6 +4814,7 @@ static int stbi__create_png_image(stbi__png *a, stbi_uc *image_data, stbi__uint3
|
||||
|
||||
// de-interlacing
|
||||
final = (stbi_uc *) stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0);
|
||||
if (!final) return stbi__err("outofmem", "Out of memory");
|
||||
for (p=0; p < 7; ++p) {
|
||||
int xorig[] = { 0,4,0,2,0,1,0 };
|
||||
int yorig[] = { 0,0,4,0,2,0,1 };
|
||||
@ -4879,19 +4935,46 @@ static int stbi__expand_png_palette(stbi__png *a, stbi_uc *palette, int len, int
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int stbi__unpremultiply_on_load = 0;
|
||||
static int stbi__de_iphone_flag = 0;
|
||||
static int stbi__unpremultiply_on_load_global = 0;
|
||||
static int stbi__de_iphone_flag_global = 0;
|
||||
|
||||
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
|
||||
{
|
||||
stbi__unpremultiply_on_load = flag_true_if_should_unpremultiply;
|
||||
stbi__unpremultiply_on_load_global = flag_true_if_should_unpremultiply;
|
||||
}
|
||||
|
||||
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
|
||||
{
|
||||
stbi__de_iphone_flag = flag_true_if_should_convert;
|
||||
stbi__de_iphone_flag_global = flag_true_if_should_convert;
|
||||
}
|
||||
|
||||
#ifndef STBI_THREAD_LOCAL
|
||||
#define stbi__unpremultiply_on_load stbi__unpremultiply_on_load_global
|
||||
#define stbi__de_iphone_flag stbi__de_iphone_flag_global
|
||||
#else
|
||||
static STBI_THREAD_LOCAL int stbi__unpremultiply_on_load_local, stbi__unpremultiply_on_load_set;
|
||||
static STBI_THREAD_LOCAL int stbi__de_iphone_flag_local, stbi__de_iphone_flag_set;
|
||||
|
||||
STBIDEF void stbi__unpremultiply_on_load_thread(int flag_true_if_should_unpremultiply)
|
||||
{
|
||||
stbi__unpremultiply_on_load_local = flag_true_if_should_unpremultiply;
|
||||
stbi__unpremultiply_on_load_set = 1;
|
||||
}
|
||||
|
||||
STBIDEF void stbi_convert_iphone_png_to_rgb_thread(int flag_true_if_should_convert)
|
||||
{
|
||||
stbi__de_iphone_flag_local = flag_true_if_should_convert;
|
||||
stbi__de_iphone_flag_set = 1;
|
||||
}
|
||||
|
||||
#define stbi__unpremultiply_on_load (stbi__unpremultiply_on_load_set \
|
||||
? stbi__unpremultiply_on_load_local \
|
||||
: stbi__unpremultiply_on_load_global)
|
||||
#define stbi__de_iphone_flag (stbi__de_iphone_flag_set \
|
||||
? stbi__de_iphone_flag_local \
|
||||
: stbi__de_iphone_flag_global)
|
||||
#endif // STBI_THREAD_LOCAL
|
||||
|
||||
static void stbi__de_iphone(stbi__png *z)
|
||||
{
|
||||
stbi__context *s = z->s;
|
||||
@ -5272,6 +5355,32 @@ typedef struct
|
||||
int extra_read;
|
||||
} stbi__bmp_data;
|
||||
|
||||
static int stbi__bmp_set_mask_defaults(stbi__bmp_data *info, int compress)
|
||||
{
|
||||
// BI_BITFIELDS specifies masks explicitly, don't override
|
||||
if (compress == 3)
|
||||
return 1;
|
||||
|
||||
if (compress == 0) {
|
||||
if (info->bpp == 16) {
|
||||
info->mr = 31u << 10;
|
||||
info->mg = 31u << 5;
|
||||
info->mb = 31u << 0;
|
||||
} else if (info->bpp == 32) {
|
||||
info->mr = 0xffu << 16;
|
||||
info->mg = 0xffu << 8;
|
||||
info->mb = 0xffu << 0;
|
||||
info->ma = 0xffu << 24;
|
||||
info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0
|
||||
} else {
|
||||
// otherwise, use defaults, which is all-0
|
||||
info->mr = info->mg = info->mb = info->ma = 0;
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
return 0; // error
|
||||
}
|
||||
|
||||
static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info)
|
||||
{
|
||||
int hsz;
|
||||
@ -5299,6 +5408,8 @@ static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info)
|
||||
if (hsz != 12) {
|
||||
int compress = stbi__get32le(s);
|
||||
if (compress == 1 || compress == 2) return stbi__errpuc("BMP RLE", "BMP type not supported: RLE");
|
||||
if (compress >= 4) return stbi__errpuc("BMP JPEG/PNG", "BMP type not supported: unsupported compression"); // this includes PNG/JPEG modes
|
||||
if (compress == 3 && info->bpp != 16 && info->bpp != 32) return stbi__errpuc("bad BMP", "bad BMP"); // bitfields requires 16 or 32 bits/pixel
|
||||
stbi__get32le(s); // discard sizeof
|
||||
stbi__get32le(s); // discard hres
|
||||
stbi__get32le(s); // discard vres
|
||||
@ -5313,17 +5424,7 @@ static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info)
|
||||
}
|
||||
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;
|
||||
}
|
||||
stbi__bmp_set_mask_defaults(info, compress);
|
||||
} else if (compress == 3) {
|
||||
info->mr = stbi__get32le(s);
|
||||
info->mg = stbi__get32le(s);
|
||||
@ -5338,6 +5439,7 @@ static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info)
|
||||
return stbi__errpuc("bad BMP", "bad BMP");
|
||||
}
|
||||
} else {
|
||||
// V4/V5 header
|
||||
int i;
|
||||
if (hsz != 108 && hsz != 124)
|
||||
return stbi__errpuc("bad BMP", "bad BMP");
|
||||
@ -5345,6 +5447,8 @@ static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info)
|
||||
info->mg = stbi__get32le(s);
|
||||
info->mb = stbi__get32le(s);
|
||||
info->ma = stbi__get32le(s);
|
||||
if (compress != 3) // override mr/mg/mb unless in BI_BITFIELDS mode, as per docs
|
||||
stbi__bmp_set_mask_defaults(info, compress);
|
||||
stbi__get32le(s); // discard color space
|
||||
for (i=0; i < 12; ++i)
|
||||
stbi__get32le(s); // discard color space parameters
|
||||
@ -5394,8 +5498,7 @@ static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req
|
||||
psize = (info.offset - info.extra_read - info.hsz) >> 2;
|
||||
}
|
||||
if (psize == 0) {
|
||||
STBI_ASSERT(info.offset == s->callback_already_read + (int) (s->img_buffer - s->img_buffer_original));
|
||||
if (info.offset != s->callback_already_read + (s->img_buffer - s->buffer_start)) {
|
||||
if (info.offset != s->callback_already_read + (s->img_buffer - s->img_buffer_original)) {
|
||||
return stbi__errpuc("bad offset", "Corrupt BMP");
|
||||
}
|
||||
}
|
||||
@ -6342,6 +6445,7 @@ static void *stbi__pic_load(stbi__context *s,int *px,int *py,int *comp,int req_c
|
||||
|
||||
// intermediate buffer is RGBA
|
||||
result = (stbi_uc *) stbi__malloc_mad3(x, y, 4, 0);
|
||||
if (!result) return stbi__errpuc("outofmem", "Out of memory");
|
||||
memset(result, 0xff, x*y*4);
|
||||
|
||||
if (!stbi__pic_load_core(s,x,y,comp, result)) {
|
||||
@ -6457,6 +6561,7 @@ static int stbi__gif_header(stbi__context *s, stbi__gif *g, int *comp, int is_in
|
||||
static int stbi__gif_info_raw(stbi__context *s, int *x, int *y, int *comp)
|
||||
{
|
||||
stbi__gif* g = (stbi__gif*) stbi__malloc(sizeof(stbi__gif));
|
||||
if (!g) return stbi__err("outofmem", "Out of memory");
|
||||
if (!stbi__gif_header(s, g, comp, 1)) {
|
||||
STBI_FREE(g);
|
||||
stbi__rewind( s );
|
||||
@ -6766,6 +6871,17 @@ static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, i
|
||||
}
|
||||
}
|
||||
|
||||
static void *stbi__load_gif_main_outofmem(stbi__gif *g, stbi_uc *out, int **delays)
|
||||
{
|
||||
STBI_FREE(g->out);
|
||||
STBI_FREE(g->history);
|
||||
STBI_FREE(g->background);
|
||||
|
||||
if (out) STBI_FREE(out);
|
||||
if (delays && *delays) STBI_FREE(*delays);
|
||||
return stbi__errpuc("outofmem", "Out of memory");
|
||||
}
|
||||
|
||||
static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
|
||||
{
|
||||
if (stbi__gif_test(s)) {
|
||||
@ -6777,6 +6893,10 @@ static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y,
|
||||
int stride;
|
||||
int out_size = 0;
|
||||
int delays_size = 0;
|
||||
|
||||
STBI_NOTUSED(out_size);
|
||||
STBI_NOTUSED(delays_size);
|
||||
|
||||
memset(&g, 0, sizeof(g));
|
||||
if (delays) {
|
||||
*delays = 0;
|
||||
@ -6794,26 +6914,29 @@ static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y,
|
||||
|
||||
if (out) {
|
||||
void *tmp = (stbi_uc*) STBI_REALLOC_SIZED( out, out_size, layers * stride );
|
||||
if (NULL == tmp) {
|
||||
STBI_FREE(g.out);
|
||||
STBI_FREE(g.history);
|
||||
STBI_FREE(g.background);
|
||||
return stbi__errpuc("outofmem", "Out of memory");
|
||||
}
|
||||
if (!tmp)
|
||||
return stbi__load_gif_main_outofmem(&g, out, delays);
|
||||
else {
|
||||
out = (stbi_uc*) tmp;
|
||||
out_size = layers * stride;
|
||||
}
|
||||
|
||||
if (delays) {
|
||||
*delays = (int*) STBI_REALLOC_SIZED( *delays, delays_size, sizeof(int) * layers );
|
||||
int *new_delays = (int*) STBI_REALLOC_SIZED( *delays, delays_size, sizeof(int) * layers );
|
||||
if (!new_delays)
|
||||
return stbi__load_gif_main_outofmem(&g, out, delays);
|
||||
*delays = new_delays;
|
||||
delays_size = layers * sizeof(int);
|
||||
}
|
||||
} else {
|
||||
out = (stbi_uc*)stbi__malloc( layers * stride );
|
||||
if (!out)
|
||||
return stbi__load_gif_main_outofmem(&g, out, delays);
|
||||
out_size = layers * stride;
|
||||
if (delays) {
|
||||
*delays = (int*) stbi__malloc( layers * sizeof(int) );
|
||||
if (!*delays)
|
||||
return stbi__load_gif_main_outofmem(&g, out, delays);
|
||||
delays_size = layers * sizeof(int);
|
||||
}
|
||||
}
|
||||
@ -7138,9 +7261,10 @@ static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp)
|
||||
|
||||
info.all_a = 255;
|
||||
p = stbi__bmp_parse_header(s, &info);
|
||||
stbi__rewind( s );
|
||||
if (p == NULL)
|
||||
if (p == NULL) {
|
||||
stbi__rewind( s );
|
||||
return 0;
|
||||
}
|
||||
if (x) *x = s->img_x;
|
||||
if (y) *y = s->img_y;
|
||||
if (comp) {
|
||||
@ -7206,8 +7330,8 @@ static int stbi__psd_is16(stbi__context *s)
|
||||
stbi__rewind( s );
|
||||
return 0;
|
||||
}
|
||||
(void) stbi__get32be(s);
|
||||
(void) stbi__get32be(s);
|
||||
STBI_NOTUSED(stbi__get32be(s));
|
||||
STBI_NOTUSED(stbi__get32be(s));
|
||||
depth = stbi__get16be(s);
|
||||
if (depth != 16) {
|
||||
stbi__rewind( s );
|
||||
@ -7286,7 +7410,6 @@ static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp)
|
||||
// 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
|
||||
|
||||
@ -7307,7 +7430,8 @@ static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req
|
||||
stbi_uc *out;
|
||||
STBI_NOTUSED(ri);
|
||||
|
||||
if (!stbi__pnm_info(s, (int *)&s->img_x, (int *)&s->img_y, (int *)&s->img_n))
|
||||
ri->bits_per_channel = stbi__pnm_info(s, (int *)&s->img_x, (int *)&s->img_y, (int *)&s->img_n);
|
||||
if (ri->bits_per_channel == 0)
|
||||
return 0;
|
||||
|
||||
if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
|
||||
@ -7317,12 +7441,12 @@ static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req
|
||||
*y = s->img_y;
|
||||
if (comp) *comp = s->img_n;
|
||||
|
||||
if (!stbi__mad3sizes_valid(s->img_n, s->img_x, s->img_y, 0))
|
||||
if (!stbi__mad4sizes_valid(s->img_n, s->img_x, s->img_y, ri->bits_per_channel / 8, 0))
|
||||
return stbi__errpuc("too large", "PNM too large");
|
||||
|
||||
out = (stbi_uc *) stbi__malloc_mad3(s->img_n, s->img_x, s->img_y, 0);
|
||||
out = (stbi_uc *) stbi__malloc_mad4(s->img_n, s->img_x, s->img_y, ri->bits_per_channel / 8, 0);
|
||||
if (!out) return stbi__errpuc("outofmem", "Out of memory");
|
||||
stbi__getn(s, out, s->img_n * s->img_x * s->img_y);
|
||||
stbi__getn(s, out, s->img_n * s->img_x * s->img_y * (ri->bits_per_channel / 8));
|
||||
|
||||
if (req_comp && req_comp != s->img_n) {
|
||||
out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y);
|
||||
@ -7398,11 +7522,19 @@ static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp)
|
||||
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");
|
||||
if (maxv > 65535)
|
||||
return stbi__err("max value > 65535", "PPM image supports only 8-bit and 16-bit images");
|
||||
else if (maxv > 255)
|
||||
return 16;
|
||||
else
|
||||
return 1;
|
||||
return 8;
|
||||
}
|
||||
|
||||
static int stbi__pnm_is16(stbi__context *s)
|
||||
{
|
||||
if (stbi__pnm_info(s, NULL, NULL, NULL) == 16)
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
@ -7458,6 +7590,9 @@ static int stbi__is_16_main(stbi__context *s)
|
||||
if (stbi__psd_is16(s)) return 1;
|
||||
#endif
|
||||
|
||||
#ifndef STBI_NO_PNM
|
||||
if (stbi__pnm_is16(s)) return 1;
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user