tomato-testing/tests/image_write_test.c
Green Sky 3cd551098b Squashed 'external/stb/stb/' content from commit c39c7023e
git-subtree-dir: external/stb/stb
git-subtree-split: c39c7023ebb833ce099750fe35509aca5662695e
2023-08-01 20:11:22 +02:00

61 lines
1.8 KiB
C

#ifdef __clang__
#define STBIWDEF static inline
#endif
#define STB_IMAGE_WRITE_STATIC
#define STB_IMAGE_WRITE_IMPLEMENTATION
#include "stb_image_write.h"
// using an 'F' since it has no rotational symmetries, and 6x5
// because it's a small, atypical size likely to trigger edge cases.
//
// conveniently, it's also small enough to fully fit inside a typical
// directory listing thumbnail, which simplifies checking at a glance.
static const char img6x5_template[] =
".****."
".*...."
".***.."
".*...."
".*....";
void image_write_test(void)
{
// make a RGB version of the template image
// use red on blue to detect R<->B swaps
unsigned char img6x5_rgb[6*5*3];
float img6x5_rgbf[6*5*3];
int i;
for (i = 0; i < 6*5; i++) {
int on = img6x5_template[i] == '*';
img6x5_rgb[i*3 + 0] = on ? 255 : 0;
img6x5_rgb[i*3 + 1] = 0;
img6x5_rgb[i*3 + 2] = on ? 0 : 255;
img6x5_rgbf[i*3 + 0] = on ? 1.0f : 0.0f;
img6x5_rgbf[i*3 + 1] = 0.0f;
img6x5_rgbf[i*3 + 2] = on ? 0.0f : 1.0f;
}
stbi_write_png("output/wr6x5_regular.png", 6, 5, 3, img6x5_rgb, 6*3);
stbi_write_bmp("output/wr6x5_regular.bmp", 6, 5, 3, img6x5_rgb);
stbi_write_tga("output/wr6x5_regular.tga", 6, 5, 3, img6x5_rgb);
stbi_write_jpg("output/wr6x5_regular.jpg", 6, 5, 3, img6x5_rgb, 95);
stbi_write_hdr("output/wr6x5_regular.hdr", 6, 5, 3, img6x5_rgbf);
stbi_flip_vertically_on_write(1);
stbi_write_png("output/wr6x5_flip.png", 6, 5, 3, img6x5_rgb, 6*3);
stbi_write_bmp("output/wr6x5_flip.bmp", 6, 5, 3, img6x5_rgb);
stbi_write_tga("output/wr6x5_flip.tga", 6, 5, 3, img6x5_rgb);
stbi_write_jpg("output/wr6x5_flip.jpg", 6, 5, 3, img6x5_rgb, 95);
stbi_write_hdr("output/wr6x5_flip.hdr", 6, 5, 3, img6x5_rgbf);
}
#ifdef IWT_TEST
int main(int argc, char **argv)
{
image_write_test();
return 0;
}
#endif