39 lines
604 B
HLSL
39 lines
604 B
HLSL
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float3 BlendAdditive(float3 a, float3 b)
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{
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return a + b;
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}
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float3 BlendExclusion(float3 a, float3 b)
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{
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return a + b - 2.0 * a * b;
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}
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float3 BlendLighten(float3 a, float3 b)
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{
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return max(a, b);
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}
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//single channel overlay
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float BlendOverlay(float a, float b)
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{
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return (b < 0.5) ? 2.0 * a * b : 1.0 - 2.0 * (1.0 - a) * (1.0 - b);
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}
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//RGB overlay
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float3 BlendOverlay(float3 a, float3 b)
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{
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float3 color;
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color.r = BlendOverlay(a.r, b.r);
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color.g = BlendOverlay(a.g, b.g);
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color.b = BlendOverlay(a.b, b.b);
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return color;
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}
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float3 BlendScreen(float3 a, float3 b)
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{
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return a + b - a * b;
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}
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