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72 lines
2.7 KiB
C++
72 lines
2.7 KiB
C++
/*
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* Copyright (c) Contributors to the Open 3D Engine Project.
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* For complete copyright and license terms please see the LICENSE at the root of this distribution.
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*
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* SPDX-License-Identifier: Apache-2.0 OR MIT
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*
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*/
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#include "ReflectionScreenSpaceBlurChildPass.h"
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#include <Atom/RHI/FrameGraphBuilder.h>
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#include <Atom/RHI/FrameGraphAttachmentInterface.h>
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#include <Atom/RPI.Reflect/Pass/FullscreenTrianglePassData.h>
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#include <Atom/RPI.Public/Shader/ShaderResourceGroup.h>
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namespace AZ
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{
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namespace Render
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{
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RPI::Ptr<ReflectionScreenSpaceBlurChildPass> ReflectionScreenSpaceBlurChildPass::Create(const RPI::PassDescriptor& descriptor)
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{
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RPI::Ptr<ReflectionScreenSpaceBlurChildPass> pass = aznew ReflectionScreenSpaceBlurChildPass(descriptor);
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return AZStd::move(pass);
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}
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ReflectionScreenSpaceBlurChildPass::ReflectionScreenSpaceBlurChildPass(const RPI::PassDescriptor& descriptor)
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: RPI::FullscreenTrianglePass(descriptor)
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{
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}
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void ReflectionScreenSpaceBlurChildPass::FrameBeginInternal(FramePrepareParams params)
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{
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// get attachment size
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RPI::PassAttachment* inputAttachment = GetInputOutputBinding(0).m_attachment.get();
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AZ_Assert(inputAttachment, "ReflectionScreenSpaceBlurChildPass: Input binding has no attachment!");
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RHI::Size size = inputAttachment->m_descriptor.m_image.m_size;
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if (m_imageSize != size)
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{
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m_imageSize = size;
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m_outputScale = (m_passType == PassType::Vertical) ? static_cast<float>(pow(2.0f, m_mipLevel)) : 1.0f;
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m_updateSrg = true;
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}
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float inverseScale = 1.0f / m_outputScale;
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uint32_t outputWidth = m_imageSize.m_width * inverseScale;
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uint32_t outputHeight = m_imageSize.m_height * inverseScale;
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params.m_viewportState = RHI::Viewport(0, static_cast<float>(outputWidth), 0, static_cast<float>(outputHeight));
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params.m_scissorState = RHI::Scissor(0, 0, outputWidth, outputHeight);
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FullscreenTrianglePass::FrameBeginInternal(params);
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}
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void ReflectionScreenSpaceBlurChildPass::CompileResources(const RHI::FrameGraphCompileContext& context)
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{
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if (m_updateSrg)
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{
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m_shaderResourceGroup->SetConstant(m_imageWidthIndex, m_imageSize.m_width);
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m_shaderResourceGroup->SetConstant(m_imageHeightIndex, m_imageSize.m_height);
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m_shaderResourceGroup->SetConstant(m_outputScaleIndex, m_outputScale);
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m_updateSrg = false;
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}
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FullscreenTrianglePass::CompileResources(context);
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}
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} // namespace RPI
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} // namespace AZ
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