56 lines
1.4 KiB
HLSL
56 lines
1.4 KiB
HLSL
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#ifndef UNITY_DYNAMIC_SCALING_CLAMPING_INCLUDED
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#define UNITY_DYNAMIC_SCALING_CLAMPING_INCLUDED
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// Functions to clamp UVs to use when RTHandle system is used.
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float2 ClampUV(float2 UV, float2 texelSize, float numberOfTexels, float2 scale)
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{
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float2 maxCoord = scale - numberOfTexels * texelSize;
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return min(UV, maxCoord);
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}
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float2 ClampUV(float2 UV, float2 texelSize, float numberOfTexels)
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{
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return ClampUV(UV, texelSize, numberOfTexels, _RTHandleScale.xy);
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}
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float2 ClampAndScaleUV(float2 UV, float2 texelSize, float numberOfTexels, float2 scale)
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{
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float2 maxCoord = 1.0f - numberOfTexels * texelSize;
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return min(UV, maxCoord) * scale;
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}
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float2 ClampAndScaleUV(float2 UV, float2 texelSize, float numberOfTexels)
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{
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return ClampAndScaleUV(UV, texelSize, numberOfTexels, _RTHandleScale.xy);
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}
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// This is assuming half a texel offset in the clamp.
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float2 ClampUVForBilinear(float2 UV, float2 texelSize)
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{
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return ClampUV(UV, texelSize, 0.5f);
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}
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float2 ClampUVForBilinear(float2 UV)
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{
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return ClampUV(UV, _ScreenSize.zw, 0.5f);
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}
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float2 ClampAndScaleUVForBilinear(float2 UV, float2 texelSize)
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{
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return ClampAndScaleUV(UV, texelSize, 0.5f);
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}
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// This is assuming full screen buffer and half a texel offset for the clamping.
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float2 ClampAndScaleUVForBilinear(float2 UV)
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{
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return ClampAndScaleUV(UV, _ScreenSize.zw, 0.5f);
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}
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float2 ClampAndScaleUVForPoint(float2 UV)
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{
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return min(UV, 1.0f) * _RTHandleScale.xy;
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}
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#endif
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