o3de/Gems/Atom/Feature/Common/Code/Source/ReflectionScreenSpace/ReflectionCopyFrameBufferPass.cpp

/*
 * Copyright (c) Contributors to the Open 3D Engine Project.
 * For complete copyright and license terms please see the LICENSE at the root of this distribution.
 *
 * SPDX-License-Identifier: Apache-2.0 OR MIT
 *
 */

#include "ReflectionCopyFrameBufferPass.h"
#include "ReflectionScreenSpaceTracePass.h"
#include <Atom/RPI.Public/Pass/PassSystemInterface.h>
#include <Atom/RPI.Public/Pass/PassFilter.h>

namespace AZ
{
    namespace Render
    {
        RPI::Ptr<ReflectionCopyFrameBufferPass> ReflectionCopyFrameBufferPass::Create(const RPI::PassDescriptor& descriptor)
        {
            RPI::Ptr<ReflectionCopyFrameBufferPass> pass = aznew ReflectionCopyFrameBufferPass(descriptor);
            return AZStd::move(pass);
        }

        ReflectionCopyFrameBufferPass::ReflectionCopyFrameBufferPass(const RPI::PassDescriptor& descriptor)
            : RPI::FullscreenTrianglePass(descriptor)
        {
        }

        void ReflectionCopyFrameBufferPass::BuildInternal()
        {
            RPI::PassFilter passFilter = RPI::PassFilter::CreateWithPassName(AZ::Name("ReflectionScreenSpaceTracePass"), GetRenderPipeline());
            RPI::PassSystemInterface::Get()->ForEachPass(passFilter, [this](RPI::Pass* pass) -> RPI::PassFilterExecutionFlow
                {
                    Render::ReflectionScreenSpaceTracePass* tracePass = azrtti_cast<ReflectionScreenSpaceTracePass*>(pass);
                    Data::Instance<RPI::AttachmentImage>& frameBufferAttachment = tracePass->GetPreviousFrameImageAttachment();

                    RPI::PassAttachmentBinding& outputBinding = GetOutputBinding(0);
                    AttachImageToSlot(outputBinding.m_name, frameBufferAttachment);

                    return RPI::PassFilterExecutionFlow::StopVisitingPasses;
                });

            FullscreenTrianglePass::BuildInternal();
        }
    }   // namespace RPI
}   // namespace AZ