mirror of https://github.com/nothings/stb.git
Merge branch 'working'
Sean Barrett
commit
b2cbed2634
82
stb_image.h
82
stb_image.h
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@ -6,6 +6,8 @@
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#define STB_IMAGE_IMPLEMENTATION
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before you include this file in *one* C or C++ file to create the implementation.
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#define STBI_ASSERT(x) to avoid using assert.h.
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QUICK NOTES:
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Primarily of interest to game developers and other people who can
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avoid problematic images and only need the trivial interface
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@ -26,6 +28,7 @@
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- overridable dequantizing-IDCT, YCbCr-to-RGB conversion (define STBI_SIMD)
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Latest revisions:
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1.42 (2014-07-09) no _CRT_SECURE_NO_WARNINGS; error-path fixes; STBI_ASSERT
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1.41 (2014-06-25) fix search&replace that messed up comments/error messages
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1.40 (2014-06-22) gcc warning
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1.39 (2014-06-15) TGA optimization fix, multiple BMP fixes
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@ -33,8 +36,6 @@
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1.37 (2014-06-04) remove duplicate typedef
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1.36 (2014-06-03) converted to header file, allow reading incorrect iphoned-images without iphone flag
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1.35 (2014-05-27) warnings, bugfixes, TGA optimization, etc
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1.34 (unknown ) warning fix
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1.33 (2011-07-14) minor fixes suggested by Dave Moore
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See end of file for full revision history.
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@ -189,12 +190,6 @@
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#ifndef STBI_NO_STDIO
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#if defined(_MSC_VER) && _MSC_VER >= 1400
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#define _CRT_SECURE_NO_WARNINGS // suppress warnings about fopen()
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#pragma warning(push)
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#pragma warning(disable:4996) // suppress even more warnings about fopen()
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#endif
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#include <stdio.h>
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#endif // STBI_NO_STDIO
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@ -354,8 +349,11 @@ STBIDEF void stbi_install_YCbCr_to_RGB(stbi_YCbCr_to_RGB_run func);
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#include <stdio.h>
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#endif
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#include <stdlib.h>
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#include <memory.h>
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#include <string.h>
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#ifndef STBI_ASSERT
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#include <assert.h>
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#define STBI_ASSERT(x) assert(x)
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#endif
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#include <stdarg.h>
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#include <stddef.h> // ptrdiff_t on osx
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@ -574,9 +572,23 @@ static unsigned char *stbi_load_main(stbi__context *s, int *x, int *y, int *comp
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}
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#ifndef STBI_NO_STDIO
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FILE *stbi__fopen(char const *filename, char const *mode)
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{
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FILE *f;
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#if _MSC_VER >= 1400
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if (0 != fopen_s(&f, filename, "rb"))
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f=0;
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#else
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f = fopen(filename, "rb");
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#endif
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return f;
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}
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STBIDEF unsigned char *stbi_load(char const *filename, int *x, int *y, int *comp, int req_comp)
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{
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FILE *f = fopen(filename, "rb");
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FILE *f = stbi__fopen(filename, "rb");
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unsigned char *result;
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if (!f) return stbi__errpuc("can't fopen", "Unable to open file");
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result = stbi_load_from_file(f,x,y,comp,req_comp);
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@ -644,8 +656,8 @@ float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int
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#ifndef STBI_NO_STDIO
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float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
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{
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FILE *f = fopen(filename, "rb");
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float *result;
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FILE *f = stbi__fopen(filename, "rb");
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if (!f) return stbi__errpf("can't fopen", "Unable to open file");
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result = stbi_loadf_from_file(f,x,y,comp,req_comp);
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fclose(f);
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@ -682,7 +694,7 @@ int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
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#ifndef STBI_NO_STDIO
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STBIDEF int stbi_is_hdr (char const *filename)
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{
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FILE *f = fopen(filename, "rb");
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FILE *f = stbi__fopen(filename, "rb");
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int result=0;
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if (f) {
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result = stbi_is_hdr_from_file(f);
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@ -860,7 +872,7 @@ static unsigned char *stbi__convert_format(unsigned char *data, int img_n, int r
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unsigned char *good;
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if (req_comp == img_n) return data;
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assert(req_comp >= 1 && req_comp <= 4);
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STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
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good = (unsigned char *) malloc(req_comp * x * y);
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if (good == NULL) {
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@ -889,7 +901,7 @@ static unsigned char *stbi__convert_format(unsigned char *data, int img_n, int r
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CASE(4,1) dest[0]=stbi__compute_y(src[0],src[1],src[2]); break;
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CASE(4,2) dest[0]=stbi__compute_y(src[0],src[1],src[2]), dest[1] = src[3]; break;
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CASE(4,3) dest[0]=src[0],dest[1]=src[1],dest[2]=src[2]; break;
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default: assert(0);
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default: STBI_ASSERT(0);
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}
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#undef CASE
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}
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@ -1126,7 +1138,7 @@ stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg *j, stbi__huffman *h)
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// convert the huffman code to the symbol id
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c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k];
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assert((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]);
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STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]);
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// convert the id to a symbol
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j->code_bits -= k;
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@ -1807,8 +1819,9 @@ static void stbi__cleanup_jpeg(stbi__jpeg *j)
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{
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int i;
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for (i=0; i < j->s->img_n; ++i) {
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if (j->img_comp[i].data) {
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if (j->img_comp[i].raw_data) {
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free(j->img_comp[i].raw_data);
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j->img_comp[i].raw_data = NULL;
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j->img_comp[i].data = NULL;
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}
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if (j->img_comp[i].linebuf) {
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@ -1831,9 +1844,10 @@ typedef struct
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static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp, int req_comp)
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{
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int n, decode_n;
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z->s->img_n = 0; // make stbi__cleanup_jpeg safe
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// validate req_comp
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if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error");
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z->s->img_n = 0;
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// load a jpeg image from whichever source
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if (!decode_jpeg_image(z)) { stbi__cleanup_jpeg(z); return NULL; }
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@ -1998,7 +2012,7 @@ stbi_inline static int stbi__bitreverse16(int n)
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stbi_inline static int stbi__bit_reverse(int v, int bits)
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{
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assert(bits <= 16);
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STBI_ASSERT(bits <= 16);
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// to bit reverse n bits, reverse 16 and shift
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// stbi__err.g. 11 bits, bit reverse and shift away 5
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return stbi__bitreverse16(v) >> (16-bits);
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@ -2016,7 +2030,7 @@ static int stbi__zbuild_huffman(stbi__zhuffman *z, stbi_uc *sizelist, int num)
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++sizes[sizelist[i]];
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sizes[0] = 0;
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for (i=1; i < 16; ++i)
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assert(sizes[i] <= (1 << i));
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STBI_ASSERT(sizes[i] <= (1 << i));
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code = 0;
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for (i=1; i < 16; ++i) {
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next_code[i] = code;
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@ -2078,7 +2092,7 @@ stbi_inline static stbi_uc stbi__zget8(stbi__zbuf *z)
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static void stbi__fill_bits(stbi__zbuf *z)
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{
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do {
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assert(z->code_buffer < (1U << z->num_bits));
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STBI_ASSERT(z->code_buffer < (1U << z->num_bits));
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z->code_buffer |= stbi__zget8(z) << z->num_bits;
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z->num_bits += 8;
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} while (z->num_bits <= 24);
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@ -2115,7 +2129,7 @@ stbi_inline static int stbi__zhuffman_decode(stbi__zbuf *a, stbi__zhuffman *z)
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if (s == 16) return -1; // invalid code!
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// code size is s, so:
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b = (k >> (16-s)) - z->firstcode[s] + z->firstsymbol[s];
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assert(z->size[b] == s);
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STBI_ASSERT(z->size[b] == s);
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a->code_buffer >>= s;
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a->num_bits -= s;
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return z->value[b];
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@ -2202,7 +2216,7 @@ static int stbi__compute_huffman_codes(stbi__zbuf *a)
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n = 0;
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while (n < hlit + hdist) {
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int c = stbi__zhuffman_decode(a, &z_codelength);
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assert(c >= 0 && c < 19);
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STBI_ASSERT(c >= 0 && c < 19);
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if (c < 16)
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lencodes[n++] = (stbi_uc) c;
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else if (c == 16) {
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@ -2214,7 +2228,7 @@ static int stbi__compute_huffman_codes(stbi__zbuf *a)
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memset(lencodes+n, 0, c);
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n += c;
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} else {
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assert(c == 18);
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STBI_ASSERT(c == 18);
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c = stbi__zreceive(a,7)+11;
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memset(lencodes+n, 0, c);
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n += c;
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@ -2239,7 +2253,7 @@ static int stbi__parse_uncomperssed_block(stbi__zbuf *a)
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a->code_buffer >>= 8;
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a->num_bits -= 8;
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}
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assert(a->num_bits == 0);
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STBI_ASSERT(a->num_bits == 0);
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// now fill header the normal way
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while (k < 4)
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header[k++] = stbi__zget8(a);
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@ -2468,7 +2482,7 @@ static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 r
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stbi__uint32 i,j,stride = x*out_n;
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int k;
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int img_n = s->img_n; // copy it into a local for later
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assert(out_n == s->img_n || out_n == s->img_n+1);
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STBI_ASSERT(out_n == s->img_n || out_n == s->img_n+1);
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a->out = (stbi_uc *) malloc(x * y * out_n);
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if (!a->out) return stbi__err("outofmem", "Out of memory");
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if (s->img_x == x && s->img_y == y) {
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@ -2516,7 +2530,7 @@ static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 r
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}
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#undef CASE
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} else {
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assert(img_n+1 == out_n);
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STBI_ASSERT(img_n+1 == out_n);
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#define CASE(f) \
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case f: \
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for (i=x-1; i >= 1; --i, cur[img_n]=255,raw+=img_n,cur+=out_n,prior+=out_n) \
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@ -2581,7 +2595,7 @@ static int stbi__compute_transparency(stbi__png *z, stbi_uc tc[3], int out_n)
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// compute color-based transparency, assuming we've
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// already got 255 as the alpha value in the output
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assert(out_n == 2 || out_n == 4);
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STBI_ASSERT(out_n == 2 || out_n == 4);
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if (out_n == 2) {
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for (i=0; i < pixel_count; ++i) {
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@ -2662,7 +2676,7 @@ static void stbi__de_iphone(stbi__png *z)
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p += 3;
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}
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} else {
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assert(s->img_out_n == 4);
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STBI_ASSERT(s->img_out_n == 4);
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if (stbi__unpremultiply_on_load) {
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// convert bgr to rgb and unpremultiply
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for (i=0; i < pixel_count; ++i) {
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@ -3036,7 +3050,7 @@ static stbi_uc *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int
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return stbi__errpuc("bad BMP", "bad BMP");
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}
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} else {
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assert(hsz == 108 || hsz == 124);
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STBI_ASSERT(hsz == 108 || hsz == 124);
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mr = stbi__get32le(s);
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mg = stbi__get32le(s);
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mb = stbi__get32le(s);
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@ -4119,7 +4133,7 @@ static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, i
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}
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case 0x3B: // gif stream termination code
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return (stbi_uc *) 1;
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return (stbi_uc *) s; // using '1' causes warning on some compilers
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default:
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return stbi__errpuc("unknown code", "Corrupt GIF");
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@ -4134,7 +4148,7 @@ static stbi_uc *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int
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memset(&g, 0, sizeof(g));
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u = stbi__gif_load_next(s, &g, comp, req_comp);
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if (u == (void *) 1) u = 0; // end of animated gif marker
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if (u == (stbi_uc *) s) u = 0; // end of animated gif marker
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if (u) {
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*x = g.w;
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*y = g.h;
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@ -4502,7 +4516,7 @@ static int stbi__info_main(stbi__context *s, int *x, int *y, int *comp)
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#ifndef STBI_NO_STDIO
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STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
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{
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FILE *f = fopen(filename, "rb");
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FILE *f = stbi__fopen(filename, "rb");
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int result;
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if (!f) return stbi__err("can't fopen", "Unable to open file");
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result = stbi_info_from_file(f, x, y, comp);
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@ -4545,6 +4559,10 @@ STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int
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/*
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revision history:
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1.42 (2014-07-09)
|
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don't define _CRT_SECURE_NO_WARNINGS (affects user code)
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fixes to stbi__cleanup_jpeg path
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added STBI_ASSERT to avoid requiring assert.h
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1.41 (2014-06-25)
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fix search&replace from 1.36 that messed up comments/error messages
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1.40 (2014-06-22)
|
||||
|
|
|
|||
Loading…
Reference in New Issue