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// This code contains NVIDIA Confidential Information and is disclosed
// under the Mutual Non-Disclosure Agreement.
//
// Notice
// ALL NVIDIA DESIGN SPECIFICATIONS AND CODE ("MATERIALS") ARE PROVIDED "AS IS" NVIDIA MAKES
// NO REPRESENTATIONS, WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
// THE MATERIALS, AND EXPRESSLY DISCLAIMS ANY IMPLIED WARRANTIES OF NONINFRINGEMENT,
// MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.
//
// NVIDIA Corporation assumes no responsibility for the consequences of use of such
// information or for any infringement of patents or other rights of third parties that may
// result from its use. No license is granted by implication or otherwise under any patent
// or patent rights of NVIDIA Corporation. No third party distribution is allowed unless
// expressly authorized by NVIDIA. Details are subject to change without notice.
// This code supersedes and replaces all information previously supplied.
// NVIDIA Corporation products are not authorized for use as critical
// components in life support devices or systems without express written approval of
// NVIDIA Corporation.
//
// Copyright � 2008- 2013 NVIDIA Corporation. All rights reserved.
//
// NVIDIA Corporation and its licensors retain all intellectual property and proprietary
// rights in and to this software and related documentation and any modifications thereto.
// Any use, reproduction, disclosure or distribution of this software and related
// documentation without an express license agreement from NVIDIA Corporation is
// strictly prohibited.
//
// #include "Common.fxh"
RW_Texture2D<float4> DestinationTex : register(u0);
Texture2D<float4> SourceTex : register(t0);
[NUM_THREADS(8,8,1)]
void main( uint2 group : S_GROUP_ID, uint2 thread : S_GROUP_THREAD_ID )
{
uint2 dstIndex = group * 8 + thread;
uint2 srcIndex = dstIndex * 2;
uint width, height;
SourceTex.GetDimensions(width, height);
if(srcIndex.x >= width || srcIndex.y >= height)
return;
float4 x0 = SourceTex[srcIndex + uint2(0, 0)];
float4 x1 = SourceTex[srcIndex + uint2(1, 0)];
float4 x2 = SourceTex[srcIndex + uint2(0, 1)];
float4 x3 = SourceTex[srcIndex + uint2(1, 1)];
DestinationTex[dstIndex] = 0.25 * (x0 + x1 + x2 + x3);
}
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