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56 lines
2.2 KiB
C++
56 lines
2.2 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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#pragma once
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#include <Atom/RPI.Public/Pass/FullscreenTrianglePass.h>
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#include <Atom/RPI.Public/Pass/ParentPass.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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//! This pass performs a separable Gaussian blur of the input reflection image
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//! to the lower mip levels of that image. The blurred mips are used as roughness levels
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//! when applying reflection data to a surface material.
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class ReflectionScreenSpaceBlurPass
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: public RPI::ParentPass
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{
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AZ_RPI_PASS(ReflectionScreenSpaceBlurPass);
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public:
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AZ_RTTI(Render::ReflectionScreenSpaceBlurPass, "{BC3D92C5-E38A-46FE-8EBD-CAD14E505946}", ParentPass);
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AZ_CLASS_ALLOCATOR(Render::ReflectionScreenSpaceBlurPass, SystemAllocator, 0);
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//! Creates a new pass without a PassTemplate
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static RPI::Ptr<ReflectionScreenSpaceBlurPass> Create(const RPI::PassDescriptor& descriptor);
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//! Returns the frame buffer image attachment used by the ReflectionFrameBufferCopy pass
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//! to store the previous frame image
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Data::Instance<RPI::AttachmentImage>& GetFrameBufferImageAttachment() { return m_frameBufferImageAttachment; }
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//! Returns the number of mip levels in the blur
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uint32_t GetNumBlurMips() const { return m_numBlurMips; }
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private:
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explicit ReflectionScreenSpaceBlurPass(const RPI::PassDescriptor& descriptor);
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void CreateChildPassesInternal() override;
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// Pass Overrides...
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void ResetInternal() override;
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void BuildInternal() override;
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AZStd::vector<RPI::Ptr<RPI::FullscreenTrianglePass>> m_verticalBlurChildPasses;
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AZStd::vector<RPI::Ptr<RPI::FullscreenTrianglePass>> m_horizontalBlurChildPasses;
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Data::Instance<RPI::AttachmentImage> m_frameBufferImageAttachment;
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uint32_t m_numBlurMips = 0;
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};
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} // namespace RPI
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} // namespace AZ
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