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obs-filters: Optimize chroma key's box filter

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Reduces number of samples taken for same effect.
This commit is contained in:
Alex Anderson
2018-07-21 10:45:24 -07:00
parent 8b6d437a97
commit 73d8220f16
1 changed files with 9 additions and 11 deletions
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20
plugins/obs-filters/data/chroma_key_filter.effect
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@@ -55,17 +55,15 @@ float4 SampleTexture(float2 uv)
float GetBoxFilteredChromaDist(float3 rgb, float2 texCoord)
{
float distVal = GetChromaDist(rgb);
distVal += GetChromaDist(SampleTexture(texCoord-pixel_size).rgb);
distVal += GetChromaDist(SampleTexture(texCoord-float2(pixel_size.x, 0.0)).rgb);
distVal += GetChromaDist(SampleTexture(texCoord-float2(pixel_size.x, -pixel_size.y)).rgb);
distVal += GetChromaDist(SampleTexture(texCoord-float2(0.0, pixel_size.y)).rgb);
distVal += GetChromaDist(SampleTexture(texCoord+float2(0.0, pixel_size.y)).rgb);
distVal += GetChromaDist(SampleTexture(texCoord+float2(pixel_size.x, -pixel_size.y)).rgb);
distVal += GetChromaDist(SampleTexture(texCoord+float2(pixel_size.x, 0.0)).rgb);
distVal += GetChromaDist(SampleTexture(texCoord+pixel_size).rgb);
float2 h_pixel_size = pixel_size / 2.0;
float2 point_0 = float2(pixel_size.x, h_pixel_size.y);
float2 point_1 = float2(h_pixel_size.x, -pixel_size.y);
float distVal = GetChromaDist(SampleTexture(texCoord-point_0).rgb);
distVal += GetChromaDist(SampleTexture(texCoord+point_0).rgb);
distVal += GetChromaDist(SampleTexture(texCoord-point_1).rgb);
distVal += GetChromaDist(SampleTexture(texCoord+point_1).rgb);
distVal *= 2.0;
distVal += GetChromaDist(rgb);
return distVal / 9.0;
}