15 lines
411 B
GLSL
15 lines
411 B
GLSL
// Using numerical value from here
|
|
// http://content.gpwiki.org/index.php/D3DBook:High-Dynamic_Range_Rendering
|
|
|
|
vec3 getCIEYxy(vec3 rgbColor)
|
|
{
|
|
mat3 RGB2XYZ = transpose(mat3(
|
|
vec3(.4125, .2126, .0193),
|
|
vec3(.3576, .7152, .1192),
|
|
vec3(.1805, .0722, .9505)));
|
|
|
|
vec3 xYz = RGB2XYZ * rgbColor;
|
|
float tmp = max(xYz.x + xYz.y + xYz.z, 0.1);
|
|
return vec3(xYz.y, xYz.xy / tmp);
|
|
}
|