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