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56 lines
1.2 KiB
Plaintext
56 lines
1.2 KiB
Plaintext
// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.
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/*=============================================================================
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ClearReplacement.usf: Collection of Shaders for alternative ways to clear a texture/buffer.
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=============================================================================*/
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#include "Common.usf"
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float4 ClearColor;
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float4 ClearVS(uint Id : SV_VertexID) : SV_POSITION
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{
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int x = Id & 1;
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int y = Id >> 1;
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return float4(x * 2 - 1, y * 2 - 1, 0, 1);
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}
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float4 ClearPS() : SV_Target0
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{
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return ClearColor;
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}
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#if FEATURE_LEVEL >= FEATURE_LEVEL_SM5
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RWTexture2D<float4> ClearTextureRW;
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uint4 TargetBounds; //xy upperleft, zw lowerright
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[numthreads(8,8,1)]
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void ClearTexture2DCS(uint2 Position : SV_DispatchThreadID)
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{
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ClearTextureRW[Position] = ClearColor;
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}
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//clear with emulated scissor rects.
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[numthreads(8, 8, 1)]
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void ClearTexture2DScissorCS(uint2 Position : SV_DispatchThreadID)
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{
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uint2 FinalPos = Position + TargetBounds.xy;
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if (all(FinalPos < TargetBounds.zw))
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{
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ClearTextureRW[FinalPos] = ClearColor;
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}
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}
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uint ClearDword;
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RWBuffer<uint> ClearBufferRW;
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[numthreads(64,1,1)]
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void ClearBufferCS(uint Position : SV_DispatchThreadID)
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{
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ClearBufferRW[Position] = ClearDword;
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}
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#endif
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