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59 lines
1.9 KiB
59 lines
1.9 KiB
#pragma kernel KMain
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#pragma multi_compile _ ENABLE_ALPHA
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#pragma multi_compile _ HDR_INPUT
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#pragma only_renderers d3d11 playstation xboxone xboxseries vulkan metal switch
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#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
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#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Color.hlsl"
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#include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderVariables.hlsl"
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TEXTURE2D_X(_InputTexture);
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RW_TEXTURE2D_X(float4, _OutputTexture);
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float4 _EASUOutputSize;
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float4 _HDROutputParams;
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#define _PaperWhite _HDROutputParams.z
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#define _OneOverPaperWhite _HDROutputParams.w
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float2 ClampFSR(float2 p);
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#define FSR_INPUT_TEXTURE _InputTexture
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#define FSR_INPUT_SAMPLER s_linear_clamp_sampler
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#define FSR_EASU_ONE_OVER_PAPER_WHITE _OneOverPaperWhite
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#define FSR_CLAMP_COORD ClampFSR
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#include "Packages/com.unity.render-pipelines.core/Runtime/PostProcessing/Shaders/FSRCommon.hlsl"
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float2 ClampFSR(float2 p)
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{
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//Gathers require entire texel clamping
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float2 maxCoord = _RTHandleScale.xy - asfloat(FSR_EASU_CONSTANTS_1.xy);
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return min(p, maxCoord);
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}
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[numthreads(64, 1, 1)]
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void KMain(uint3 LocalThreadId : SV_GroupThreadID, uint3 WorkGroupId : SV_GroupID, uint3 dispatchThreadId : SV_DispatchThreadID)
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{
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UNITY_XR_ASSIGN_VIEW_INDEX(dispatchThreadId.z);
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// Do remapping of local xy in workgroup for a more PS-like swizzle pattern.
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uint2 gxy = ARmp8x8(LocalThreadId.x) + uint2(WorkGroupId.x << 3u, WorkGroupId.y << 3u);
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#ifdef ENABLE_ALPHA
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float2 uv = ((float2)gxy.xy + 0.5) * _EASUOutputSize.zw;
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float alpha = SAMPLE_TEXTURE2D_X_LOD(_InputTexture, s_linear_clamp_sampler, ClampFSR(uv), 0.0).a;
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#else
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float alpha = 1.0;
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#endif
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float3 c = ApplyEASU(gxy);
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#ifdef HDR_INPUT
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c = FastTonemapInvert(c) * _PaperWhite;
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#endif
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// Input always stored in gamma 2.0
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c = Gamma20ToLinear(c);
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_OutputTexture[COORD_TEXTURE2D_X(gxy)] = float4(c, alpha);
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}
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