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change bmp info to use common header parser

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This commit is contained in:
Sean Barrett 2015-11-08 13:09:16 -08:00
parent 876aea3dbe
commit 297ff62859
2 changed files with 15 additions and 25 deletions
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34
stb_image.h
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@ -6088,29 +6088,17 @@ static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp)
#ifndef STBI_NO_BMP
static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp)
{
int hsz;
if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') {
stbi__rewind( s );
return 0;
}
stbi__skip(s,12);
hsz = stbi__get32le(s);
if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) {
stbi__rewind( s );
return 0;
}
if (hsz == 12) {
*x = stbi__get16le(s);
*y = stbi__get16le(s);
} else {
*x = stbi__get32le(s);
*y = stbi__get32le(s);
}
if (stbi__get16le(s) != 1) {
stbi__rewind( s );
return 0;
}
*comp = stbi__get16le(s) / 8;
void *p;
stbi__bmp_data info;
info.all_a = 255;
p = stbi__bmp_parse_header(s, &info);
stbi__rewind( s );
if (p == NULL)
return 0;
*x = s->img_x;
*y = s->img_y;
*comp = info.ma ? 4 : 3;
return 1;
}
#endif

6
tests/image_test.c
View File

@ -81,15 +81,17 @@ int main(int argc, char **argv)
for (i=1; i < argc; ++i) {
int res;
int w2,h2,n2;
unsigned char *data;
printf("%s\n", argv[i]);
res = stbi_info(argv[1], &w, &h, &n);
res = stbi_info(argv[1], &w2, &h2, &n2);
data = stbi_load(argv[i], &w, &h, &n, 4); if (data) free(data); else printf("Failed &n\n");
data = stbi_load(argv[i], &w, &h, 0, 1); if (data) free(data); else printf("Failed 1\n");
data = stbi_load(argv[i], &w, &h, 0, 2); if (data) free(data); else printf("Failed 2\n");
data = stbi_load(argv[i], &w, &h, 0, 3); if (data) free(data); else printf("Failed 3\n");
data = stbi_load(argv[i], &w, &h, 0, 4);
data = stbi_load(argv[i], &w, &h, &n, 4);
assert(data);
assert(w == w2 && h == h2 && n == n2);
assert(res);
if (data) {
char fname[512];