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72 lines
2.2 KiB
Plaintext
72 lines
2.2 KiB
Plaintext
/*
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* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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* its licensors.
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*
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* For complete copyright and license terms please see the LICENSE at the root of this
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* distribution (the "License"). All use of this software is governed by the License,
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* or, if provided, by the license below or the license accompanying this file. Do not
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* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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*/
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#include <Atom/Features/SrgSemantics.azsli>
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ShaderResourceGroup PassSrg : SRG_PerPass
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{
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Texture2D<float4> m_inputTexture;
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RWTexture2D<float4> m_outputTexture;
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Buffer<float> m_offsets;
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Buffer<float> m_weights;
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uint m_kernelRadius;
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uint m_direction;
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uint m_mipLevel;
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float2 m_sourceImageSize;
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// 1.0 / m_sourceImageSize
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float2 m_sourceImageTexelSize;
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Sampler LinearSampler
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{
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AddressU = Clamp;
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AddressV = Clamp;
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MinFilter = Linear;
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MagFilter = Linear;
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MipFilter = Linear;
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};
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}
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[numthreads(8, 8, 1)]
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void MainCS(uint3 dID : SV_DispatchThreadID)
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{
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if(dID.x >= PassSrg::m_sourceImageSize.x || dID.y >= PassSrg::m_sourceImageSize.y)
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{
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return;
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}
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float2 uv = (dID.xy + 0.5) * PassSrg::m_sourceImageTexelSize;
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// Kernel has been normalized beforehand
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float3 sum = (PassSrg::m_kernelRadius > 0 ? PassSrg::m_weights[0] : 1.0) *
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PassSrg::m_inputTexture.SampleLevel(PassSrg::LinearSampler, uv, PassSrg::m_mipLevel);
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float2 t = (PassSrg::m_direction ? float2(1.0, 0.0) : float2(0.0, 1.0)) * PassSrg::m_sourceImageTexelSize;
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for(int i = 1; i < PassSrg::m_kernelRadius; ++i)
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{
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float2 offset = PassSrg::m_offsets[i] * t;
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// One side with positive offset
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sum += PassSrg::m_weights[i] *
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PassSrg::m_inputTexture.SampleLevel(PassSrg::LinearSampler, uv + offset, PassSrg::m_mipLevel).rgb;
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// The other side with negative offset
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sum += PassSrg::m_weights[i] *
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PassSrg::m_inputTexture.SampleLevel(PassSrg::LinearSampler, uv - offset, PassSrg::m_mipLevel).rgb;
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}
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PassSrg::m_outputTexture[dID.xy] = float4(sum, 1.0);
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}
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