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GS-ogl: Automatically adjust color compensation based on rgb value for hw blend clr3 case. 

Auto adjust when any color is higher than 128 ( 1.0f) to get more accurate color results.
This commit is contained in:
lightningterror 2023-03-06 02:40:12 +01:00
parent e8cf4822b1
commit 8c0ee33c4c
1 changed files with 7 additions and 3 deletions
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10
bin/resources/shaders/opengl/tfx_fs.glsl
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@ -821,9 +821,13 @@ float As = As_rgba.a;
Color.rgb *= vec3(255.0f);
#elif PS_CLR_HW == 3
// Needed for Cs*Ad, Cs*Ad + Cd, Cd - Cs*Ad
// Multiply Color.rgb by (255/128) to compensate for wrong Ad/255 value
Color.rgb *= (255.0f / 128.0f);
// Multiply Color.rgb by (255/128) to compensate for wrong Ad/255 value when rgb are below 128.
// When any color channel is higher than 128 then adjust the compensation automatically
// to give us more accurate colors, otherwise they will be wrong.
// The higher the value (>128) the lower the compensation will be.
float max_color = max(max(Color.r, Color.g), Color.b);
float color_compensate = 255.0f / max(128.0f, max_color);
Color.rgb *= vec3(color_compensate);
#endif
#endif