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e9276fc6db
- Uses the InstanceCullingLoadBalancer to pre-distribute the work on the CPU to ensure even load. - Make instance culling use the instance data offset in MDC instead of translating primitive IDs. - Track single-instance draws separately from instanced to optimize handling (disable culling for single-instance primitives). #rb Graham.wihlidal,andrew.lauritzen #fyi dmitriy.dyomin #preflight 60d0eafa2ab2180001269160 [CL 16733827 by Ola Olsson in ue5-main branch]
96 lines
4.3 KiB
C++
96 lines
4.3 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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/*=============================================================================
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SimpleMeshDrawCommandPass.cpp:
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=============================================================================*/
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#include "SimpleMeshDrawCommandPass.h"
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#include "ScenePrivate.h"
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FSimpleMeshDrawCommandPass::FSimpleMeshDrawCommandPass(const FSceneView& View, FInstanceCullingManager* InstanceCullingManager, bool bEnableStereo) :
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DynamicPassMeshDrawListContext(DynamicMeshDrawCommandStorage, VisibleMeshDrawCommands, GraphicsMinimalPipelineStateSet, bNeedsInitialization)
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{
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check(View.bIsViewInfo);
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const FViewInfo* ViewInfo = static_cast<const FViewInfo*>(&View);
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TArray<int32, TFixedAllocator<2> > ViewIds;
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ViewIds.Add(ViewInfo->GPUSceneViewId);
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bUsingStereo = bEnableStereo && ViewInfo->bIsInstancedStereoEnabled && !View.bIsMultiViewEnabled && IStereoRendering::IsStereoEyeView(View);
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if (bUsingStereo)
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{
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check(ViewInfo->GetInstancedView() != nullptr);
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ViewIds.Add(ViewInfo->GetInstancedView()->GPUSceneViewId);
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}
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InstanceCullingContext = FInstanceCullingContext(InstanceCullingManager, ViewIds, bUsingStereo ? EInstanceCullingMode::Stereo : EInstanceCullingMode::Normal);
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bDynamicInstancing = IsDynamicInstancingEnabled(ViewInfo->GetFeatureLevel());
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InstanceFactor = static_cast<uint32>(ViewIds.Num());
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}
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void FSimpleMeshDrawCommandPass::BuildRenderingCommands(FRDGBuilder& GraphBuilder, const FSceneView& View, const FGPUScene& GPUScene, FInstanceCullingDrawParams& OutInstanceCullingDrawParams)
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{
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// NOTE: Everything up to InstanceCullingContext.BuildRenderingCommands could be peeled off into an async task.
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ApplyViewOverridesToMeshDrawCommands(View, VisibleMeshDrawCommands, DynamicMeshDrawCommandStorage, GraphicsMinimalPipelineStateSet, bNeedsInitialization);
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FInstanceCullingResult InstanceCullingResult;
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VisibleMeshDrawCommands.Sort(FCompareFMeshDrawCommands());
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if (GPUScene.IsEnabled())
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{
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int32 MaxInstances = 0;
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int32 VisibleMeshDrawCommandsNum = 0;
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int32 NewPassVisibleMeshDrawCommandsNum = 0;
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// 1. do the first thing first
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InstanceCullingContext.SetupDrawCommands(VisibleMeshDrawCommands, true, MaxInstances, VisibleMeshDrawCommandsNum, NewPassVisibleMeshDrawCommandsNum);
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// 2. Run finalize culling commands pass
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check(View.bIsViewInfo);
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const FViewInfo* ViewInfo = static_cast<const FViewInfo*>(&View);
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InstanceCullingContext.BuildRenderingCommands(GraphBuilder, GPUScene, ViewInfo->DynamicPrimitiveCollector.GetInstanceSceneDataOffset(), ViewInfo->DynamicPrimitiveCollector.NumInstances(), InstanceCullingResult);
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// Signal that scene primitives are supported, used for validation, the existence of a valid InstanceCullingResult is the required signal
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bSupportsScenePrimitives = true;
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}
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InstanceCullingResult.GetDrawParameters(OutInstanceCullingDrawParams);
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}
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void FSimpleMeshDrawCommandPass::BuildRenderingCommands(FRDGBuilder& GraphBuilder, const FSceneView& View, const FScene& Scene, FInstanceCullingDrawParams& OutInstanceCullingDrawParams)
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{
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BuildRenderingCommands(GraphBuilder, View, Scene.GPUScene, OutInstanceCullingDrawParams);
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}
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void FSimpleMeshDrawCommandPass::SubmitDraw(FRHICommandListImmediate& RHICmdList, const FInstanceCullingDrawParams& InstanceCullingDrawParams) const
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{
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if (VisibleMeshDrawCommands.Num() > 0)
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{
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if (bSupportsScenePrimitives)
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{
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FRHIBuffer* DrawIndirectArgsBuffer = nullptr;
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FRHIBuffer* InstanceIdOffsetBuffer = nullptr;
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if (InstanceCullingDrawParams.DrawIndirectArgsBuffer.GetBuffer() != nullptr && InstanceCullingDrawParams.InstanceIdOffsetBuffer.GetBuffer() != nullptr)
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{
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DrawIndirectArgsBuffer = InstanceCullingDrawParams.DrawIndirectArgsBuffer.GetBuffer()->GetRHI();
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InstanceIdOffsetBuffer = InstanceCullingDrawParams.InstanceIdOffsetBuffer.GetBuffer()->GetRHI();
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}
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SubmitGPUInstancedMeshDrawCommandsRange(
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VisibleMeshDrawCommands,
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GraphicsMinimalPipelineStateSet,
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0,
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VisibleMeshDrawCommands.Num(),
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InstanceFactor,
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InstanceIdOffsetBuffer,
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DrawIndirectArgsBuffer,
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InstanceCullingDrawParams.DrawCommandDataOffset,
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RHICmdList);
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}
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else
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{
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SubmitMeshDrawCommandsRange(VisibleMeshDrawCommands, GraphicsMinimalPipelineStateSet, PrimitiveIdVertexBuffer, 0, bDynamicInstancing, 0, VisibleMeshDrawCommands.Num(), InstanceFactor, RHICmdList);
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}
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}
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}
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