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66 lines
1.6 KiB
66 lines
1.6 KiB
#pragma kernel FgFiltFreenScreen
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float4 _GreenScreenColor;
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float _GreenScreenColorRange;
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float _SetTranspBelow;
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float _SetOpaqueAbove;
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float4 _GreenScreenRect;
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RWTexture2D<float4> _ColorTex;
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RWTexture2D<float4> _AlphaTex;
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float3 RGBtoYUV(float3 rgb)
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{
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float4x4 RGB2YUV = { 0.182586, 0.614231, 0.062007, 0.062745,
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-0.100644, -0.338572, 0.439216, 0.501961,
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0.439216, -0.398942, -0.040274, 0.501961,
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0.000000, 0.000000, 0.000000, 1.000000 };
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return mul(RGB2YUV, float4(rgb, 1)).rgb;
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}
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[numthreads(8, 8, 1)]
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void FgFiltFreenScreen(uint3 id : SV_DispatchThreadID)
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{
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float alpha = 0.0;
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if (id.x >= (uint)_GreenScreenRect.x && id.x <= (uint)_GreenScreenRect.z && id.y >= (uint)_GreenScreenRect.y && id.y <= (uint)_GreenScreenRect.w)
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{
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float3 greenYuv = RGBtoYUV(_GreenScreenColor.rgb);
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for (int v = -1; v <= 1; v++)
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{
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for (int u = -1; u <= 1; u++)
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{
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int2 uv = id.xy + int2(u, v);
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float3 colorYuv = RGBtoYUV(_ColorTex[uv].rgb);
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alpha += distance(colorYuv.yz, greenYuv.yz);
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}
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}
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alpha = saturate(9.0 * alpha / 9.0 - _GreenScreenColorRange);
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if (alpha < _SetTranspBelow)
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alpha = 0.0;
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if (alpha > _SetOpaqueAbove)
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alpha = 1.0;
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}
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_AlphaTex[id.xy] = float4(alpha, alpha, alpha, alpha);
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//alpha = saturate(distance(greenYuv.yz, RGBtoYUV(_ColorTex[id.xy].rgb).yz));
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//_AlphaTex[id.xy] = float4(/**alpha, alpha, alpha,*/ greenYuv, 1);
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//float3 yuv = RGBtoYUV(_ColorTex[id.xy].rgb);
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//float dist = saturate(distance(greenYuv.yz, yuv.yz) * 10 - _GreenScreenColorRange);
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////_AlphaTex[id.xy] = float4(yuv.x, yuv.x, yuv.x, 1);
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//_AlphaTex[id.xy] = float4(dist, dist, dist, dist);
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}
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