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#ifndef POI_BLENDING
#define POI_BLENDING
/*
0: Zero float4(0.0, 0.0, 0.0, 0.0),
1: One float4(1.0, 1.0, 1.0, 1.0),
2: DstColor destinationColor,
3: SrcColor sourceColor,
4: OneMinusDstColor float4(1.0, 1.0, 1.0, 1.0) - destinationColor,
5: SrcAlpha sourceColor.aaaa,
6: OneMinusSrcColor float4(1.0, 1.0, 1.0, 1.0) - sourceColor,
7: DstAlpha destinationColor.aaaa,
8: OneMinusDstAlpha float4(1.0, 1.0, 1.0, 1.0) - destinationColor.,
9: SrcAlphaSaturate saturate(sourceColor.aaaa),
10: OneMinusSrcAlpha float4(1.0, 1.0, 1.0, 1.0) - sourceColor.aaaa,
*/
float4 poiBlend(const uint sourceFactor, const float4 sourceColor, const uint destinationFactor, const float4 destinationColor)
{
const float4 blendData[11] = {
float4(0.0, 0.0, 0.0, 0.0),
float4(1.0, 1.0, 1.0, 1.0),
destinationColor,
sourceColor,
float4(1.0, 1.0, 1.0, 1.0) - destinationColor,
sourceColor.aaaa,
float4(1.0, 1.0, 1.0, 1.0) - sourceColor,
destinationColor.aaaa,
float4(1.0, 1.0, 1.0, 1.0) - destinationColor.aaaa,
saturate(sourceColor.aaaa),
float4(1.0, 1.0, 1.0, 1.0) - sourceColor.aaaa,
};
return lerp(blendData[sourceFactor] * sourceColor + blendData[destinationFactor] * destinationColor,sourceColor, sourceColor.a);
}
#endif
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