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Code Issues Projects Releases Wiki Activity

Use Apple RGB color profile

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elasota
2020-06-07 20:42:49 -04:00
parent b55a508686
commit 5b95fd8c6b
5 changed files with 65 additions and 72 deletions
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2
ShaderSrc/DrawQuadPaletteP.hlsl
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@@ -29,5 +29,7 @@ SDrawQuadPixelOutput PSMain(SDrawQuadPixelInput input)
if (result.color.a <= 0.0)
discard;
result.color.rgb = AppleRGBToSRGBLinear(result.color.rgb);
return result;
}

21
ShaderSrc/Functions.h
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@@ -47,13 +47,24 @@ float4 ApplyFlicker(int2 coordinate, int startThreshold, int endThreshold, float
float4 ApplyDesaturation(float desaturation, float4 color)
{
// This is intentionally done in gamma space
if (desaturation == 0.0)
return color;
float3 srgbColor = LinearToSRGB(color.rgb);
float grayLevel = dot(srgbColor, float3(3.0, 6.0, 1.0) / 10.0);
float grayLevel = dot(color.rgb, float3(3.0, 6.0, 1.0) / 10.0);
srgbColor = srgbColor * (1.0 - desaturation) + float3(grayLevel, grayLevel, grayLevel) * desaturation;
return float4(SRGBToLinear(srgbColor), color.a);
color.rgb = color.rgb * (1.0 - desaturation) + float3(grayLevel, grayLevel, grayLevel) * desaturation;
return color;
}
float3 AppleRGBToSRGBLinear(float3 color)
{
color = pow(saturate(color), 1.8);
float3 result;
result = color.r * float3(1.06870538834699, 0.024110476735, 0.00173499822713);
result += color.g * float3(-0.07859532843279, 0.96007030899244, 0.02974755969275);
result += color.b * float3(0.00988984558395, 0.01581936633364, 0.96851741859153);
return result;
}