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Optimize DDGI probes border pixels to be copied within probe update, rather than via separate dispatch

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This commit is contained in:
Wojtek Figat
2024-07-18 19:51:01 +02:00
parent aeff147b6d
commit 03898a064a
3 changed files with 85 additions and 114 deletions
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37
Source/Engine/Renderer/GI/DynamicDiffuseGlobalIllumination.cpp
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@@ -219,10 +219,6 @@ bool DynamicDiffuseGlobalIlluminationPass::setupResources()
_csTraceRays[3] = shader->GetCS("CS_TraceRays", 3);
_csUpdateProbesIrradiance = shader->GetCS("CS_UpdateProbes", 0);
_csUpdateProbesDistance = shader->GetCS("CS_UpdateProbes", 1);
_csUpdateBordersIrradianceRow = shader->GetCS("CS_UpdateBorders", 0);
_csUpdateBordersIrradianceCollumn = shader->GetCS("CS_UpdateBorders", 1);
_csUpdateBordersDistanceRow = shader->GetCS("CS_UpdateBorders", 2);
_csUpdateBordersDistanceCollumn = shader->GetCS("CS_UpdateBorders", 3);
auto device = GPUDevice::Instance;
auto psDesc = GPUPipelineState::Description::DefaultFullscreenTriangle;
if (!_psIndirectLighting)
@@ -250,10 +246,6 @@ void DynamicDiffuseGlobalIlluminationPass::OnShaderReloading(Asset* obj)
_csTraceRays[3] = nullptr;
_csUpdateProbesIrradiance = nullptr;
_csUpdateProbesDistance = nullptr;
_csUpdateBordersIrradianceRow = nullptr;
_csUpdateBordersIrradianceCollumn = nullptr;
_csUpdateBordersDistanceRow = nullptr;
_csUpdateBordersDistanceCollumn = nullptr;
SAFE_DELETE_GPU_RESOURCE(_psIndirectLighting);
invalidateResources();
}
@@ -542,7 +534,6 @@ bool DynamicDiffuseGlobalIlluminationPass::RenderInner(RenderContext& renderCont
// Update probes
{
PROFILE_GPU_CPU_NAMED("Probes Update");
bool anyDirty = false;
uint32 threadGroupsX, threadGroupsY;
#if DDGI_DEBUG_STATS
uint32 zero[4] = {};
@@ -552,7 +543,6 @@ bool DynamicDiffuseGlobalIlluminationPass::RenderInner(RenderContext& renderCont
{
if (cascadeSkipUpdate[cascadeIndex])
continue;
anyDirty = true;
// Classify probes (activation/deactivation and relocation)
{
@@ -667,33 +657,6 @@ bool DynamicDiffuseGlobalIlluminationPass::RenderInner(RenderContext& renderCont
}
}
#endif
// Update probes border pixels
if (anyDirty)
{
PROFILE_GPU_CPU_NAMED("Update Borders");
// Irradiance
context->BindUA(0, ddgiData.Result.ProbesIrradiance);
threadGroupsX = Math::DivideAndRoundUp(probesCountTotalX * (DDGI_PROBE_RESOLUTION_IRRADIANCE + 2), DDGI_PROBE_UPDATE_BORDERS_GROUP_SIZE);
threadGroupsY = Math::DivideAndRoundUp(probesCountTotalY, DDGI_PROBE_UPDATE_BORDERS_GROUP_SIZE);
context->Dispatch(_csUpdateBordersIrradianceRow, threadGroupsX, threadGroupsY, 1);
threadGroupsX = Math::DivideAndRoundUp(probesCountTotalX, DDGI_PROBE_UPDATE_BORDERS_GROUP_SIZE);
threadGroupsY = Math::DivideAndRoundUp(probesCountTotalY * (DDGI_PROBE_RESOLUTION_IRRADIANCE + 2), DDGI_PROBE_UPDATE_BORDERS_GROUP_SIZE);
context->Dispatch(_csUpdateBordersIrradianceCollumn, threadGroupsX, threadGroupsY, 1);
// Distance
context->BindUA(0, ddgiData.Result.ProbesDistance);
threadGroupsX = Math::DivideAndRoundUp(probesCountTotalX * (DDGI_PROBE_RESOLUTION_DISTANCE + 2), DDGI_PROBE_UPDATE_BORDERS_GROUP_SIZE);
threadGroupsY = Math::DivideAndRoundUp(probesCountTotalY, DDGI_PROBE_UPDATE_BORDERS_GROUP_SIZE);
context->Dispatch(_csUpdateBordersDistanceRow, threadGroupsX, threadGroupsY, 1);
threadGroupsX = Math::DivideAndRoundUp(probesCountTotalX, DDGI_PROBE_UPDATE_BORDERS_GROUP_SIZE);
threadGroupsY = Math::DivideAndRoundUp(probesCountTotalY * (DDGI_PROBE_RESOLUTION_DISTANCE + 2), DDGI_PROBE_UPDATE_BORDERS_GROUP_SIZE);
context->Dispatch(_csUpdateBordersDistanceCollumn, threadGroupsX, threadGroupsY, 1);
context->ResetUA();
context->ResetSR();
}
}
return false;

4
Source/Engine/Renderer/GI/DynamicDiffuseGlobalIllumination.h
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@@ -47,10 +47,6 @@ private:
GPUShaderProgramCS* _csTraceRays[4];
GPUShaderProgramCS* _csUpdateProbesIrradiance;
GPUShaderProgramCS* _csUpdateProbesDistance;
GPUShaderProgramCS* _csUpdateBordersIrradianceRow;
GPUShaderProgramCS* _csUpdateBordersIrradianceCollumn;
GPUShaderProgramCS* _csUpdateBordersDistanceRow;
GPUShaderProgramCS* _csUpdateBordersDistanceCollumn;
GPUPipelineState* _psIndirectLighting;
#if USE_EDITOR
AssetReference<Model> _debugModel;