17 lines
547 B
GLSL
17 lines
547 B
GLSL
// Using numerical value from here
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// http://content.gpwiki.org/index.php/D3DBook:High-Dynamic_Range_Rendering
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vec3 getCIEYxy(vec3 rgbColor)
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{
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// convert rgb to srgb
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vec3 sRGBColor = rgbColor;//vec3(pow(rgbColor.x, 1. / 2.2), pow(rgbColor.y, 1. / 2.2), pow(rgbColor.z, 1. / 2.2));
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mat3 sRGB2XYZ = transpose(mat3(
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vec3(.4125, .2126, .0193),
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vec3(.3576, .7152, .1192),
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vec3(.1805, .0722, .9505)));
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vec3 XYZ = sRGB2XYZ * sRGBColor;
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float sum = dot(vec3(1.), XYZ);
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return vec3(XYZ.y, XYZ.xy / sum);
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} |