15 lines
401 B
GLSL
15 lines
401 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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mat3 RGB2XYZ = 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 = RGB2XYZ * rgbColor;
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float tmp = xYz.x + xYz.y + xYz.z;
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return vec3(xYz.y, xYz.xy / tmp);
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}
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