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Update stb_image to v2.27 and stb_image_write to v1.16

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kimci86 2022-12-28 16:12:02 +01:00 committed by Lukas Dürrenberger
parent 3ae6848727
commit 3649fceb8b
2 changed files with 9621 additions and 9452 deletions
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277
extlibs/headers/stb_image/stb_image.h vendored
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@ -1,4 +1,4 @@
/* stb_image - v2.26 - public domain image loader - http://nothings.org/stb /* stb_image - v2.27 - public domain image loader - http://nothings.org/stb
no warranty implied; use at your own risk no warranty implied; use at your own risk
Do this: Do this:
@ -48,6 +48,7 @@ LICENSE
RECENT REVISION HISTORY: RECENT REVISION HISTORY:
2.27 (2021-07-11) document stbi_info better, 16-bit PNM support, bug fixes
2.26 (2020-07-13) many minor fixes 2.26 (2020-07-13) many minor fixes
2.25 (2020-02-02) fix warnings 2.25 (2020-02-02) fix warnings
2.24 (2020-02-02) fix warnings; thread-local failure_reason and flip_vertically 2.24 (2020-02-02) fix warnings; thread-local failure_reason and flip_vertically
@ -89,7 +90,7 @@ RECENT REVISION HISTORY:
Jeremy Sawicki (handle all ImageNet JPGs) Jeremy Sawicki (handle all ImageNet JPGs)
Optimizations & bugfixes Mikhail Morozov (1-bit BMP) Optimizations & bugfixes Mikhail Morozov (1-bit BMP)
Fabian "ryg" Giesen Anael Seghezzi (is-16-bit query) Fabian "ryg" Giesen Anael Seghezzi (is-16-bit query)
Arseny Kapoulkine Arseny Kapoulkine Simon Breuss (16-bit PNM)
John-Mark Allen John-Mark Allen
Carmelo J Fdez-Aguera Carmelo J Fdez-Aguera
@ -102,7 +103,7 @@ RECENT REVISION HISTORY:
Thomas Ruf Ronny Chevalier github:rlyeh Thomas Ruf Ronny Chevalier github:rlyeh
Janez Zemva John Bartholomew Michal Cichon github:romigrou Janez Zemva John Bartholomew Michal Cichon github:romigrou
Jonathan Blow Ken Hamada Tero Hanninen github:svdijk Jonathan Blow Ken Hamada Tero Hanninen github:svdijk
Laurent Gomila Cort Stratton github:snagar Eugene Golushkov Laurent Gomila Cort Stratton github:snagar
Aruelien Pocheville Sergio Gonzalez Thibault Reuille github:Zelex Aruelien Pocheville Sergio Gonzalez Thibault Reuille github:Zelex
Cass Everitt Ryamond Barbiero github:grim210 Cass Everitt Ryamond Barbiero github:grim210
Paul Du Bois Engin Manap Aldo Culquicondor github:sammyhw Paul Du Bois Engin Manap Aldo Culquicondor github:sammyhw
@ -110,11 +111,13 @@ RECENT REVISION HISTORY:
Josh Tobin Matthew Gregan github:poppolopoppo Josh Tobin Matthew Gregan github:poppolopoppo
Julian Raschke Gregory Mullen Christian Floisand github:darealshinji Julian Raschke Gregory Mullen Christian Floisand github:darealshinji
Baldur Karlsson Kevin Schmidt JR Smith github:Michaelangel007 Baldur Karlsson Kevin Schmidt JR Smith github:Michaelangel007
Brad Weinberger Matvey Cherevko [reserved] Brad Weinberger Matvey Cherevko github:mosra
Luca Sas Alexander Veselov Zack Middleton [reserved] Luca Sas Alexander Veselov Zack Middleton [reserved]
Ryan C. Gordon [reserved] [reserved] Ryan C. Gordon [reserved] [reserved]
DO NOT ADD YOUR NAME HERE DO NOT ADD YOUR NAME HERE
Jacko Dirks
To add your name to the credits, pick a random blank space in the middle and fill it. To add your name to the credits, pick a random blank space in the middle and fill it.
80% of merge conflicts on stb PRs are due to people adding their name at the end 80% of merge conflicts on stb PRs are due to people adding their name at the end
of the credits. of the credits.
@ -176,6 +179,32 @@ RECENT REVISION HISTORY:
// //
// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized. // Paletted PNG, BMP, GIF, and PIC images are automatically depalettized.
// //
// To query the width, height and component count of an image without having to
// decode the full file, you can use the stbi_info family of functions:
//
// int x,y,n,ok;
// ok = stbi_info(filename, &x, &y, &n);
// // returns ok=1 and sets x, y, n if image is a supported format,
// // 0 otherwise.
//
// Note that stb_image pervasively uses ints in its public API for sizes,
// including sizes of memory buffers. This is now part of the API and thus
// hard to change without causing breakage. As a result, the various image
// loaders all have certain limits on image size; these differ somewhat
// by format but generally boil down to either just under 2GB or just under
// 1GB. When the decoded image would be larger than this, stb_image decoding
// will fail.
//
// Additionally, stb_image will reject image files that have any of their
// dimensions set to a larger value than the configurable STBI_MAX_DIMENSIONS,
// which defaults to 2**24 = 16777216 pixels. Due to the above memory limit,
// the only way to have an image with such dimensions load correctly
// is for it to have a rather extreme aspect ratio. Either way, the
// assumption here is that such larger images are likely to be malformed
// or malicious. If you do need to load an image with individual dimensions
// larger than that, and it still fits in the overall size limit, you can
// #define STBI_MAX_DIMENSIONS on your own to be something larger.
//
// =========================================================================== // ===========================================================================
// //
// UNICODE: // UNICODE:
@ -281,11 +310,10 @@ RECENT REVISION HISTORY:
// //
// iPhone PNG support: // iPhone PNG support:
// //
// By default we convert iphone-formatted PNGs back to RGB, even though // We optionally support converting iPhone-formatted PNGs (which store
// they are internally encoded differently. You can disable this conversion // premultiplied BGRA) back to RGB, even though they're internally encoded
// by calling stbi_convert_iphone_png_to_rgb(0), in which case // differently. To enable this conversion, call
// you will always just get the native iphone "format" through (which // stbi_convert_iphone_png_to_rgb(1).
// is BGR stored in RGB).
// //
// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per // Call stbi_set_unpremultiply_on_load(1) as well to force a divide per
// pixel to remove any premultiplied alpha *only* if the image file explicitly // pixel to remove any premultiplied alpha *only* if the image file explicitly
@ -489,6 +517,8 @@ STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip);
// as above, but only applies to images loaded on the thread that calls the function // as above, but only applies to images loaded on the thread that calls the function
// this function is only available if your compiler supports thread-local variables; // this function is only available if your compiler supports thread-local variables;
// calling it will fail to link if your compiler doesn't // calling it will fail to link if your compiler doesn't
STBIDEF void stbi_set_unpremultiply_on_load_thread(int flag_true_if_should_unpremultiply);
STBIDEF void stbi_convert_iphone_png_to_rgb_thread(int flag_true_if_should_convert);
STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip); STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip);
// ZLIB client - used by PNG, available for other purposes // ZLIB client - used by PNG, available for other purposes
@ -634,7 +664,7 @@ typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1];
#ifdef STBI_HAS_LROTL #ifdef STBI_HAS_LROTL
#define stbi_lrot(x,y) _lrotl(x,y) #define stbi_lrot(x,y) _lrotl(x,y)
#else #else
#define stbi_lrot(x,y) (((x) << (y)) | ((x) >> (32 - (y)))) #define stbi_lrot(x,y) (((x) << (y)) | ((x) >> (-(y) & 31)))
#endif #endif
#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED)) #if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED))
@ -748,9 +778,12 @@ static int stbi__sse2_available(void)
#ifdef STBI_NEON #ifdef STBI_NEON
#include <arm_neon.h> #include <arm_neon.h>
// assume GCC or Clang on ARM targets #ifdef _MSC_VER
#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name
#else
#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) #define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
#endif #endif
#endif
#ifndef STBI_SIMD_ALIGN #ifndef STBI_SIMD_ALIGN
#define STBI_SIMD_ALIGN(type, name) type name #define STBI_SIMD_ALIGN(type, name) type name
@ -924,6 +957,7 @@ static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp);
static int stbi__pnm_test(stbi__context *s); static int stbi__pnm_test(stbi__context *s);
static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp); static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp);
static int stbi__pnm_is16(stbi__context *s);
#endif #endif
static static
@ -998,7 +1032,7 @@ static int stbi__mad3sizes_valid(int a, int b, int c, int add)
} }
// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow // returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow
#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) #if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) || !defined(STBI_NO_PNM)
static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add) static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add)
{ {
return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) && return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) &&
@ -1021,7 +1055,7 @@ static void *stbi__malloc_mad3(int a, int b, int c, int add)
return stbi__malloc(a*b*c + add); return stbi__malloc(a*b*c + add);
} }
#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) #if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) || !defined(STBI_NO_PNM)
static void *stbi__malloc_mad4(int a, int b, int c, int d, int add) static void *stbi__malloc_mad4(int a, int b, int c, int d, int add)
{ {
if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL; if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL;
@ -1087,9 +1121,8 @@ static void *stbi__load_main(stbi__context *s, int *x, int *y, int *comp, int re
ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order
ri->num_channels = 0; ri->num_channels = 0;
#ifndef STBI_NO_JPEG // test the formats with a very explicit header first (at least a FOURCC
if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp, ri); // or distinctive magic number first)
#endif
#ifndef STBI_NO_PNG #ifndef STBI_NO_PNG
if (stbi__png_test(s)) return stbi__png_load(s,x,y,comp,req_comp, ri); if (stbi__png_test(s)) return stbi__png_load(s,x,y,comp,req_comp, ri);
#endif #endif
@ -1107,6 +1140,13 @@ static void *stbi__load_main(stbi__context *s, int *x, int *y, int *comp, int re
#ifndef STBI_NO_PIC #ifndef STBI_NO_PIC
if (stbi__pic_test(s)) return stbi__pic_load(s,x,y,comp,req_comp, ri); if (stbi__pic_test(s)) return stbi__pic_load(s,x,y,comp,req_comp, ri);
#endif #endif
// then the formats that can end up attempting to load with just 1 or 2
// bytes matching expectations; these are prone to false positives, so
// try them later
#ifndef STBI_NO_JPEG
if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp, ri);
#endif
#ifndef STBI_NO_PNM #ifndef STBI_NO_PNM
if (stbi__pnm_test(s)) return stbi__pnm_load(s,x,y,comp,req_comp, ri); if (stbi__pnm_test(s)) return stbi__pnm_load(s,x,y,comp,req_comp, ri);
#endif #endif
@ -1262,12 +1302,12 @@ static void stbi__float_postprocess(float *result, int *x, int *y, int *comp, in
#ifndef STBI_NO_STDIO #ifndef STBI_NO_STDIO
#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8) #if defined(_WIN32) && defined(STBI_WINDOWS_UTF8)
STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide); STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide);
STBI_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t *widestr, int cchwide, char *str, int cbmb, const char *defchar, int *used_default); STBI_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t *widestr, int cchwide, char *str, int cbmb, const char *defchar, int *used_default);
#endif #endif
#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8) #if defined(_WIN32) && defined(STBI_WINDOWS_UTF8)
STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input) STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input)
{ {
return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int) bufferlen, NULL, NULL); return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int) bufferlen, NULL, NULL);
@ -1277,16 +1317,16 @@ STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wch
static FILE *stbi__fopen(char const *filename, char const *mode) static FILE *stbi__fopen(char const *filename, char const *mode)
{ {
FILE *f; FILE *f;
#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8) #if defined(_WIN32) && defined(STBI_WINDOWS_UTF8)
wchar_t wMode[64]; wchar_t wMode[64];
wchar_t wFilename[1024]; wchar_t wFilename[1024];
if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename))) if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename)/sizeof(*wFilename)))
return 0; return 0;
if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode))) if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode)/sizeof(*wMode)))
return 0; return 0;
#if _MSC_VER >= 1400 #if defined(_MSC_VER) && _MSC_VER >= 1400
if (0 != _wfopen_s(&f, wFilename, wMode)) if (0 != _wfopen_s(&f, wFilename, wMode))
f = 0; f = 0;
#else #else
@ -1662,7 +1702,8 @@ static int stbi__get16le(stbi__context *s)
static stbi__uint32 stbi__get32le(stbi__context *s) static stbi__uint32 stbi__get32le(stbi__context *s)
{ {
stbi__uint32 z = stbi__get16le(s); stbi__uint32 z = stbi__get16le(s);
return z + (stbi__get16le(s) << 16); z += (stbi__uint32)stbi__get16le(s) << 16;
return z;
} }
#endif #endif
@ -2090,13 +2131,12 @@ stbi_inline static int stbi__extend_receive(stbi__jpeg *j, int n)
int sgn; int sgn;
if (j->code_bits < n) stbi__grow_buffer_unsafe(j); if (j->code_bits < n) stbi__grow_buffer_unsafe(j);
sgn = (stbi__int32)j->code_buffer >> 31; // sign bit is always in MSB sgn = j->code_buffer >> 31; // sign bit always in MSB; 0 if MSB clear (positive), 1 if MSB set (negative)
k = stbi_lrot(j->code_buffer, n); k = stbi_lrot(j->code_buffer, n);
if (n < 0 || n >= (int) (sizeof(stbi__bmask)/sizeof(*stbi__bmask))) return 0;
j->code_buffer = k & ~stbi__bmask[n]; j->code_buffer = k & ~stbi__bmask[n];
k &= stbi__bmask[n]; k &= stbi__bmask[n];
j->code_bits -= n; j->code_bits -= n;
return k + (stbi__jbias[n] & ~sgn); return k + (stbi__jbias[n] & (sgn - 1));
} }
// get some unsigned bits // get some unsigned bits
@ -2146,7 +2186,7 @@ static int stbi__jpeg_decode_block(stbi__jpeg *j, short data[64], stbi__huffman
if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
t = stbi__jpeg_huff_decode(j, hdc); t = stbi__jpeg_huff_decode(j, hdc);
if (t < 0) return stbi__err("bad huffman code","Corrupt JPEG"); if (t < 0 || t > 15) return stbi__err("bad huffman code","Corrupt JPEG");
// 0 all the ac values now so we can do it 32-bits at a time // 0 all the ac values now so we can do it 32-bits at a time
memset(data,0,64*sizeof(data[0])); memset(data,0,64*sizeof(data[0]));
@ -2203,12 +2243,12 @@ static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg *j, short data[64], stbi__
// first scan for DC coefficient, must be first // first scan for DC coefficient, must be first
memset(data,0,64*sizeof(data[0])); // 0 all the ac values now memset(data,0,64*sizeof(data[0])); // 0 all the ac values now
t = stbi__jpeg_huff_decode(j, hdc); t = stbi__jpeg_huff_decode(j, hdc);
if (t == -1) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); if (t < 0 || t > 15) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
diff = t ? stbi__extend_receive(j, t) : 0; diff = t ? stbi__extend_receive(j, t) : 0;
dc = j->img_comp[b].dc_pred + diff; dc = j->img_comp[b].dc_pred + diff;
j->img_comp[b].dc_pred = dc; j->img_comp[b].dc_pred = dc;
data[0] = (short) (dc << j->succ_low); data[0] = (short) (dc * (1 << j->succ_low));
} else { } else {
// refinement scan for DC coefficient // refinement scan for DC coefficient
if (stbi__jpeg_get_bit(j)) if (stbi__jpeg_get_bit(j))
@ -2245,7 +2285,7 @@ static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg *j, short data[64], stbi__
j->code_buffer <<= s; j->code_buffer <<= s;
j->code_bits -= s; j->code_bits -= s;
zig = stbi__jpeg_dezigzag[k++]; zig = stbi__jpeg_dezigzag[k++];
data[zig] = (short) ((r >> 8) << shift); data[zig] = (short) ((r >> 8) * (1 << shift));
} else { } else {
int rs = stbi__jpeg_huff_decode(j, hac); int rs = stbi__jpeg_huff_decode(j, hac);
if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG"); if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
@ -2263,7 +2303,7 @@ static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg *j, short data[64], stbi__
} else { } else {
k += r; k += r;
zig = stbi__jpeg_dezigzag[k++]; zig = stbi__jpeg_dezigzag[k++];
data[zig] = (short) (stbi__extend_receive(j,s) << shift); data[zig] = (short) (stbi__extend_receive(j,s) * (1 << shift));
} }
} }
} while (k <= j->spec_end); } while (k <= j->spec_end);
@ -3227,6 +3267,13 @@ static int stbi__process_frame_header(stbi__jpeg *z, int scan)
if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v; if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v;
} }
// check that plane subsampling factors are integer ratios; our resamplers can't deal with fractional ratios
// and I've never seen a non-corrupted JPEG file actually use them
for (i=0; i < s->img_n; ++i) {
if (h_max % z->img_comp[i].h != 0) return stbi__err("bad H","Corrupt JPEG");
if (v_max % z->img_comp[i].v != 0) return stbi__err("bad V","Corrupt JPEG");
}
// compute interleaved mcu info // compute interleaved mcu info
z->img_h_max = h_max; z->img_h_max = h_max;
z->img_v_max = v_max; z->img_v_max = v_max;
@ -3782,6 +3829,10 @@ static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp
else else
decode_n = z->s->img_n; decode_n = z->s->img_n;
// nothing to do if no components requested; check this now to avoid
// accessing uninitialized coutput[0] later
if (decode_n <= 0) { stbi__cleanup_jpeg(z); return NULL; }
// resample and color-convert // resample and color-convert
{ {
int k; int k;
@ -3924,6 +3975,7 @@ static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int re
{ {
unsigned char* result; unsigned char* result;
stbi__jpeg* j = (stbi__jpeg*) stbi__malloc(sizeof(stbi__jpeg)); stbi__jpeg* j = (stbi__jpeg*) stbi__malloc(sizeof(stbi__jpeg));
if (!j) return stbi__errpuc("outofmem", "Out of memory");
STBI_NOTUSED(ri); STBI_NOTUSED(ri);
j->s = s; j->s = s;
stbi__setup_jpeg(j); stbi__setup_jpeg(j);
@ -3936,6 +3988,7 @@ static int stbi__jpeg_test(stbi__context *s)
{ {
int r; int r;
stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg)); stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg));
if (!j) return stbi__err("outofmem", "Out of memory");
j->s = s; j->s = s;
stbi__setup_jpeg(j); stbi__setup_jpeg(j);
r = stbi__decode_jpeg_header(j, STBI__SCAN_type); r = stbi__decode_jpeg_header(j, STBI__SCAN_type);
@ -3960,6 +4013,7 @@ static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp)
{ {
int result; int result;
stbi__jpeg* j = (stbi__jpeg*) (stbi__malloc(sizeof(stbi__jpeg))); stbi__jpeg* j = (stbi__jpeg*) (stbi__malloc(sizeof(stbi__jpeg)));
if (!j) return stbi__err("outofmem", "Out of memory");
j->s = s; j->s = s;
result = stbi__jpeg_info_raw(j, x, y, comp); result = stbi__jpeg_info_raw(j, x, y, comp);
STBI_FREE(j); STBI_FREE(j);
@ -3979,6 +4033,7 @@ static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp)
// fast-way is faster to check than jpeg huffman, but slow way is slower // fast-way is faster to check than jpeg huffman, but slow way is slower
#define STBI__ZFAST_BITS 9 // accelerate all cases in default tables #define STBI__ZFAST_BITS 9 // accelerate all cases in default tables
#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1) #define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1)
#define STBI__ZNSYMS 288 // number of symbols in literal/length alphabet
// zlib-style huffman encoding // zlib-style huffman encoding
// (jpegs packs from left, zlib from right, so can't share code) // (jpegs packs from left, zlib from right, so can't share code)
@ -3988,8 +4043,8 @@ typedef struct
stbi__uint16 firstcode[16]; stbi__uint16 firstcode[16];
int maxcode[17]; int maxcode[17];
stbi__uint16 firstsymbol[16]; stbi__uint16 firstsymbol[16];
stbi_uc size[288]; stbi_uc size[STBI__ZNSYMS];
stbi__uint16 value[288]; stbi__uint16 value[STBI__ZNSYMS];
} stbi__zhuffman; } stbi__zhuffman;
stbi_inline static int stbi__bitreverse16(int n) 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! if (s >= 16) return -1; // invalid code!
// code size is s, so: // code size is s, so:
b = (k >> (16-s)) - z->firstcode[s] + z->firstsymbol[s]; 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. if (z->size[b] != s) return -1; // was originally an assert, but report failure instead.
a->code_buffer >>= s; a->code_buffer >>= s;
a->num_bits -= s; a->num_bits -= s;
@ -4317,7 +4372,7 @@ static int stbi__parse_zlib_header(stbi__zbuf *a)
return 1; 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,
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 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 { } else {
if (type == 1) { if (type == 1) {
// use fixed code lengths // 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; if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance, 32)) return 0;
} else { } else {
if (!stbi__compute_huffman_codes(a)) return 0; 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 // de-interlacing
final = (stbi_uc *) stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0); 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) { for (p=0; p < 7; ++p) {
int xorig[] = { 0,4,0,2,0,1,0 }; int xorig[] = { 0,4,0,2,0,1,0 };
int yorig[] = { 0,0,4,0,2,0,1 }; 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; return 1;
} }
static int stbi__unpremultiply_on_load = 0; static int stbi__unpremultiply_on_load_global = 0;
static int stbi__de_iphone_flag = 0; static int stbi__de_iphone_flag_global = 0;
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply) 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) 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) static void stbi__de_iphone(stbi__png *z)
{ {
stbi__context *s = z->s; stbi__context *s = z->s;
@ -5272,6 +5355,32 @@ typedef struct
int extra_read; int extra_read;
} stbi__bmp_data; } 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) static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info)
{ {
int hsz; int hsz;
@ -5299,6 +5408,8 @@ static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info)
if (hsz != 12) { if (hsz != 12) {
int compress = stbi__get32le(s); int compress = stbi__get32le(s);
if (compress == 1 || compress == 2) return stbi__errpuc("BMP RLE", "BMP type not supported: RLE"); 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 sizeof
stbi__get32le(s); // discard hres stbi__get32le(s); // discard hres
stbi__get32le(s); // discard vres 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 (info->bpp == 16 || info->bpp == 32) {
if (compress == 0) { if (compress == 0) {
if (info->bpp == 32) { stbi__bmp_set_mask_defaults(info, compress);
info->mr = 0xffu << 16;
info->mg = 0xffu << 8;
info->mb = 0xffu << 0;
info->ma = 0xffu << 24;
info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0
} else {
info->mr = 31u << 10;
info->mg = 31u << 5;
info->mb = 31u << 0;
}
} else if (compress == 3) { } else if (compress == 3) {
info->mr = stbi__get32le(s); info->mr = stbi__get32le(s);
info->mg = 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"); return stbi__errpuc("bad BMP", "bad BMP");
} }
} else { } else {
// V4/V5 header
int i; int i;
if (hsz != 108 && hsz != 124) if (hsz != 108 && hsz != 124)
return stbi__errpuc("bad BMP", "bad BMP"); 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->mg = stbi__get32le(s);
info->mb = stbi__get32le(s); info->mb = stbi__get32le(s);
info->ma = 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 stbi__get32le(s); // discard color space
for (i=0; i < 12; ++i) for (i=0; i < 12; ++i)
stbi__get32le(s); // discard color space parameters 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; psize = (info.offset - info.extra_read - info.hsz) >> 2;
} }
if (psize == 0) { 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->img_buffer_original)) {
if (info.offset != s->callback_already_read + (s->img_buffer - s->buffer_start)) {
return stbi__errpuc("bad offset", "Corrupt BMP"); 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 // intermediate buffer is RGBA
result = (stbi_uc *) stbi__malloc_mad3(x, y, 4, 0); 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); memset(result, 0xff, x*y*4);
if (!stbi__pic_load_core(s,x,y,comp, result)) { 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) 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)); 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)) { if (!stbi__gif_header(s, g, comp, 1)) {
STBI_FREE(g); STBI_FREE(g);
stbi__rewind( s ); 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) 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)) { 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 stride;
int out_size = 0; int out_size = 0;
int delays_size = 0; int delays_size = 0;
STBI_NOTUSED(out_size);
STBI_NOTUSED(delays_size);
memset(&g, 0, sizeof(g)); memset(&g, 0, sizeof(g));
if (delays) { if (delays) {
*delays = 0; *delays = 0;
@ -6794,26 +6914,29 @@ static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y,
if (out) { if (out) {
void *tmp = (stbi_uc*) STBI_REALLOC_SIZED( out, out_size, layers * stride ); void *tmp = (stbi_uc*) STBI_REALLOC_SIZED( out, out_size, layers * stride );
if (NULL == tmp) { if (!tmp)
STBI_FREE(g.out); return stbi__load_gif_main_outofmem(&g, out, delays);
STBI_FREE(g.history);
STBI_FREE(g.background);
return stbi__errpuc("outofmem", "Out of memory");
}
else { else {
out = (stbi_uc*) tmp; out = (stbi_uc*) tmp;
out_size = layers * stride; out_size = layers * stride;
} }
if (delays) { 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); delays_size = layers * sizeof(int);
} }
} else { } else {
out = (stbi_uc*)stbi__malloc( layers * stride ); out = (stbi_uc*)stbi__malloc( layers * stride );
if (!out)
return stbi__load_gif_main_outofmem(&g, out, delays);
out_size = layers * stride; out_size = layers * stride;
if (delays) { if (delays) {
*delays = (int*) stbi__malloc( layers * sizeof(int) ); *delays = (int*) stbi__malloc( layers * sizeof(int) );
if (!*delays)
return stbi__load_gif_main_outofmem(&g, out, delays);
delays_size = layers * sizeof(int); 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; info.all_a = 255;
p = stbi__bmp_parse_header(s, &info); p = stbi__bmp_parse_header(s, &info);
if (p == NULL) {
stbi__rewind( s ); stbi__rewind( s );
if (p == NULL)
return 0; return 0;
}
if (x) *x = s->img_x; if (x) *x = s->img_x;
if (y) *y = s->img_y; if (y) *y = s->img_y;
if (comp) { if (comp) {
@ -7206,8 +7330,8 @@ static int stbi__psd_is16(stbi__context *s)
stbi__rewind( s ); stbi__rewind( s );
return 0; return 0;
} }
(void) stbi__get32be(s); STBI_NOTUSED(stbi__get32be(s));
(void) stbi__get32be(s); STBI_NOTUSED(stbi__get32be(s));
depth = stbi__get16be(s); depth = stbi__get16be(s);
if (depth != 16) { if (depth != 16) {
stbi__rewind( s ); stbi__rewind( s );
@ -7286,7 +7410,6 @@ static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp)
// Known limitations: // Known limitations:
// Does not support comments in the header section // Does not support comments in the header section
// Does not support ASCII image data (formats P2 and P3) // Does not support ASCII image data (formats P2 and P3)
// Does not support 16-bit-per-channel
#ifndef STBI_NO_PNM #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_uc *out;
STBI_NOTUSED(ri); 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; return 0;
if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); 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; *y = s->img_y;
if (comp) *comp = s->img_n; 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"); 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"); 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) { if (req_comp && req_comp != s->img_n) {
out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y); 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); stbi__pnm_skip_whitespace(s, &c);
maxv = stbi__pnm_getinteger(s, &c); // read max value maxv = stbi__pnm_getinteger(s, &c); // read max value
if (maxv > 65535)
if (maxv > 255) return stbi__err("max value > 65535", "PPM image supports only 8-bit and 16-bit images");
return stbi__err("max value > 255", "PPM image not 8-bit"); else if (maxv > 255)
return 16;
else else
return 8;
}
static int stbi__pnm_is16(stbi__context *s)
{
if (stbi__pnm_info(s, NULL, NULL, NULL) == 16)
return 1; return 1;
return 0;
} }
#endif #endif
@ -7458,6 +7590,9 @@ static int stbi__is_16_main(stbi__context *s)
if (stbi__psd_is16(s)) return 1; if (stbi__psd_is16(s)) return 1;
#endif #endif
#ifndef STBI_NO_PNM
if (stbi__pnm_is16(s)) return 1;
#endif
return 0; return 0;
} }

62
extlibs/headers/stb_image/stb_image_write.h vendored
View File

@ -1,4 +1,4 @@
/* stb_image_write - v1.15 - public domain - http://nothings.org/stb /* stb_image_write - v1.16 - public domain - http://nothings.org/stb
writes out PNG/BMP/TGA/JPEG/HDR images to C stdio - Sean Barrett 2010-2015 writes out PNG/BMP/TGA/JPEG/HDR images to C stdio - Sean Barrett 2010-2015
no warranty implied; use at your own risk no warranty implied; use at your own risk
@ -140,6 +140,7 @@ CREDITS:
Ivan Tikhonov Ivan Tikhonov
github:ignotion github:ignotion
Adam Schackart Adam Schackart
Andrew Kensler
LICENSE LICENSE
@ -166,9 +167,9 @@ LICENSE
#endif #endif
#ifndef STB_IMAGE_WRITE_STATIC // C++ forbids static forward declarations #ifndef STB_IMAGE_WRITE_STATIC // C++ forbids static forward declarations
extern int stbi_write_tga_with_rle; STBIWDEF int stbi_write_tga_with_rle;
extern int stbi_write_png_compression_level; STBIWDEF int stbi_write_png_compression_level;
extern int stbi_write_force_png_filter; STBIWDEF int stbi_write_force_png_filter;
#endif #endif
#ifndef STBI_WRITE_NO_STDIO #ifndef STBI_WRITE_NO_STDIO
@ -178,7 +179,7 @@ STBIWDEF int stbi_write_tga(char const *filename, int w, int h, int comp, const
STBIWDEF int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data); STBIWDEF int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data);
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality); STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality);
#ifdef STBI_WINDOWS_UTF8 #ifdef STBIW_WINDOWS_UTF8
STBIWDEF int stbiw_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input); STBIWDEF int stbiw_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input);
#endif #endif
#endif #endif
@ -285,7 +286,7 @@ static void stbi__stdio_write(void *context, void *data, int size)
fwrite(data,1,size,(FILE*) context); fwrite(data,1,size,(FILE*) context);
} }
#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8) #if defined(_WIN32) && defined(STBIW_WINDOWS_UTF8)
#ifdef __cplusplus #ifdef __cplusplus
#define STBIW_EXTERN extern "C" #define STBIW_EXTERN extern "C"
#else #else
@ -303,16 +304,16 @@ STBIWDEF int stbiw_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const w
static FILE *stbiw__fopen(char const *filename, char const *mode) static FILE *stbiw__fopen(char const *filename, char const *mode)
{ {
FILE *f; FILE *f;
#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8) #if defined(_WIN32) && defined(STBIW_WINDOWS_UTF8)
wchar_t wMode[64]; wchar_t wMode[64];
wchar_t wFilename[1024]; wchar_t wFilename[1024];
if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename))) if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename)/sizeof(*wFilename)))
return 0; return 0;
if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode))) if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode)/sizeof(*wMode)))
return 0; return 0;
#if _MSC_VER >= 1400 #if defined(_MSC_VER) && _MSC_VER >= 1400
if (0 != _wfopen_s(&f, wFilename, wMode)) if (0 != _wfopen_s(&f, wFilename, wMode))
f = 0; f = 0;
#else #else
@ -397,7 +398,7 @@ static void stbiw__putc(stbi__write_context *s, unsigned char c)
static void stbiw__write1(stbi__write_context *s, unsigned char a) static void stbiw__write1(stbi__write_context *s, unsigned char a)
{ {
if (s->buf_used + 1 > sizeof(s->buffer)) if ((size_t)s->buf_used + 1 > sizeof(s->buffer))
stbiw__write_flush(s); stbiw__write_flush(s);
s->buffer[s->buf_used++] = a; s->buffer[s->buf_used++] = a;
} }
@ -405,7 +406,7 @@ static void stbiw__write1(stbi__write_context *s, unsigned char a)
static void stbiw__write3(stbi__write_context *s, unsigned char a, unsigned char b, unsigned char c) static void stbiw__write3(stbi__write_context *s, unsigned char a, unsigned char b, unsigned char c)
{ {
int n; int n;
if (s->buf_used + 3 > sizeof(s->buffer)) if ((size_t)s->buf_used + 3 > sizeof(s->buffer))
stbiw__write_flush(s); stbiw__write_flush(s);
n = s->buf_used; n = s->buf_used;
s->buf_used = n+3; s->buf_used = n+3;
@ -490,11 +491,22 @@ static int stbiw__outfile(stbi__write_context *s, int rgb_dir, int vdir, int x,
static int stbi_write_bmp_core(stbi__write_context *s, int x, int y, int comp, const void *data) static int stbi_write_bmp_core(stbi__write_context *s, int x, int y, int comp, const void *data)
{ {
if (comp != 4) {
// write RGB bitmap
int pad = (-x*3) & 3; int pad = (-x*3) & 3;
return stbiw__outfile(s,-1,-1,x,y,comp,1,(void *) data,0,pad, return stbiw__outfile(s,-1,-1,x,y,comp,1,(void *) data,0,pad,
"11 4 22 4" "4 44 22 444444", "11 4 22 4" "4 44 22 444444",
'B', 'M', 14+40+(x*3+pad)*y, 0,0, 14+40, // file header 'B', 'M', 14+40+(x*3+pad)*y, 0,0, 14+40, // file header
40, x,y, 1,24, 0,0,0,0,0,0); // bitmap header 40, x,y, 1,24, 0,0,0,0,0,0); // bitmap header
} else {
// RGBA bitmaps need a v4 header
// use BI_BITFIELDS mode with 32bpp and alpha mask
// (straight BI_RGB with alpha mask doesn't work in most readers)
return stbiw__outfile(s,-1,-1,x,y,comp,1,(void *)data,1,0,
"11 4 22 4" "4 44 22 444444 4444 4 444 444 444 444",
'B', 'M', 14+108+x*y*4, 0, 0, 14+108, // file header
108, x,y, 1,32, 3,0,0,0,0,0, 0xff0000,0xff00,0xff,0xff000000u, 0, 0,0,0, 0,0,0, 0,0,0, 0,0,0); // bitmap V4 header
}
} }
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data) STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
@ -622,6 +634,8 @@ STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const
#define stbiw__max(a, b) ((a) > (b) ? (a) : (b)) #define stbiw__max(a, b) ((a) > (b) ? (a) : (b))
#ifndef STBI_WRITE_NO_STDIO
static void stbiw__linear_to_rgbe(unsigned char *rgbe, float *linear) static void stbiw__linear_to_rgbe(unsigned char *rgbe, float *linear)
{ {
int exponent; int exponent;
@ -756,7 +770,7 @@ static int stbi_write_hdr_core(stbi__write_context *s, int x, int y, int comp, f
char header[] = "#?RADIANCE\n# Written by stb_image_write.h\nFORMAT=32-bit_rle_rgbe\n"; char header[] = "#?RADIANCE\n# Written by stb_image_write.h\nFORMAT=32-bit_rle_rgbe\n";
s->func(s->context, header, sizeof(header)-1); s->func(s->context, header, sizeof(header)-1);
#ifdef __STDC_WANT_SECURE_LIB__ #ifdef __STDC_LIB_EXT1__
len = sprintf_s(buffer, sizeof(buffer), "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x); len = sprintf_s(buffer, sizeof(buffer), "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x);
#else #else
len = sprintf(buffer, "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x); len = sprintf(buffer, "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x);
@ -777,7 +791,6 @@ STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x,
return stbi_write_hdr_core(&s, x, y, comp, (float *) data); return stbi_write_hdr_core(&s, x, y, comp, (float *) data);
} }
#ifndef STBI_WRITE_NO_STDIO
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data) STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
{ {
stbi__write_context s = { 0 }; stbi__write_context s = { 0 };
@ -968,6 +981,23 @@ STBIWDEF unsigned char * stbi_zlib_compress(unsigned char *data, int data_len, i
(void) stbiw__sbfree(hash_table[i]); (void) stbiw__sbfree(hash_table[i]);
STBIW_FREE(hash_table); STBIW_FREE(hash_table);
// store uncompressed instead if compression was worse
if (stbiw__sbn(out) > data_len + 2 + ((data_len+32766)/32767)*5) {
stbiw__sbn(out) = 2; // truncate to DEFLATE 32K window and FLEVEL = 1
for (j = 0; j < data_len;) {
int blocklen = data_len - j;
if (blocklen > 32767) blocklen = 32767;
stbiw__sbpush(out, data_len - j == blocklen); // BFINAL = ?, BTYPE = 0 -- no compression
stbiw__sbpush(out, STBIW_UCHAR(blocklen)); // LEN
stbiw__sbpush(out, STBIW_UCHAR(blocklen >> 8));
stbiw__sbpush(out, STBIW_UCHAR(~blocklen)); // NLEN
stbiw__sbpush(out, STBIW_UCHAR(~blocklen >> 8));
memcpy(out+stbiw__sbn(out), data+j, blocklen);
stbiw__sbn(out) += blocklen;
j += blocklen;
}
}
{ {
// compute adler32 on input // compute adler32 on input
unsigned int s1=1, s2=0; unsigned int s1=1, s2=0;
@ -1598,6 +1628,10 @@ STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const
#endif // STB_IMAGE_WRITE_IMPLEMENTATION #endif // STB_IMAGE_WRITE_IMPLEMENTATION
/* Revision history /* Revision history
1.16 (2021-07-11)
make Deflate code emit uncompressed blocks when it would otherwise expand
support writing BMPs with alpha channel
1.15 (2020-07-13) unknown
1.14 (2020-02-02) updated JPEG writer to downsample chroma channels 1.14 (2020-02-02) updated JPEG writer to downsample chroma channels
1.13 1.13
1.12 1.12