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60 lines
1.8 KiB
60 lines
1.8 KiB
#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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