2014-12-07 19:09:38 -05:00
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// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.
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2014-03-14 14:13:41 -04:00
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/*=============================================================================
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PostProcessVisualizeGBuffer.usf: PostProcessing shader to visualize the GBuffer
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=============================================================================*/
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#include "Common.usf"
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#include "PostProcessCommon.usf"
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#include "DeferredShadingCommon.usf"
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#include "PostProcessHistogramCommon.usf"
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/** Main pixel shader function */
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void MainPS(float4 UVAndScreenPos : TEXCOORD0, out float4 OutColor : SV_Target0)
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{
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float Alpha = 1;
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#if DRAWING_TILE
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int2 PixelPos = (int2)(UVAndScreenPos.zw * ScreenPosToPixel.xy + ScreenPosToPixel.zw + 0.5f);
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// half viewport size
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int2 HalfInsetSize = (int2)(ViewportSize.xy / 2);
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// quarter viewport size
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int2 QuarterInsetSize = (int2)(ViewportSize.xy / 4);
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// 16 tiles over the full viewport
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int2 QuarterTileXY = (int2)((uint2)PixelPos / QuarterInsetSize);
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// pixel position within a quartertile
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int2 QuarterTileLocalPos = PixelPos - QuarterTileXY * QuarterInsetSize;
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const int Border1 = 10;
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const int Border2 = 8;
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float BorderDistance = ComputeDistanceToRect(QuarterTileLocalPos, int2(0, 0) + Border1.xx, QuarterInsetSize - 2 * Border1.xx);
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Alpha = 1 - saturate((BorderDistance - Border2.x) * 0.5f);
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#endif
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OutColor = float4(Texture2DSample(PostprocessInput0, PostprocessInput0Sampler, UVAndScreenPos.xy).rgb, Alpha);
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}
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