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Improve precision of the gammaToLinearPrecise shader function.

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Alex Szpakowski
2019-01-15 17:29:13 -04:00
parent 91d425e7e1
commit d83117c981
1 changed files with 4 additions and 4 deletions
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src/modules/graphics/wrap_GraphicsShader.lua
+4 -4
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@@ -138,13 +138,13 @@ GLSL.FUNCTIONS = [[
#endif
float gammaToLinearPrecise(float c) {
return c <= 0.04045 ? c * 0.077399380804954 : pow((c + 0.055) * 0.9478672985782, 2.4);
return c <= 0.04045 ? c / 12.92 : pow((c + 0.055) / 1.055, 2.4);
}
vec3 gammaToLinearPrecise(vec3 c) {
bvec3 leq = lessThanEqual(c, vec3(0.04045));
c.r = leq.r ? c.r * 0.077399380804954 : pow((c.r + 0.055) * 0.9478672985782, 2.4);
c.g = leq.g ? c.g * 0.077399380804954 : pow((c.g + 0.055) * 0.9478672985782, 2.4);
c.b = leq.b ? c.b * 0.077399380804954 : pow((c.b + 0.055) * 0.9478672985782, 2.4);
c.r = leq.r ? c.r / 12.92 : pow((c.r + 0.055) / 1.055, 2.4);
c.g = leq.g ? c.g / 12.92 : pow((c.g + 0.055) / 1.055, 2.4);
c.b = leq.b ? c.b / 12.92 : pow((c.b + 0.055) / 1.055, 2.4);
return c;
}
vec4 gammaToLinearPrecise(vec4 c) { return vec4(gammaToLinearPrecise(c.rgb), c.a); }