bool FProfilerManager::TrackStat( const uint32 StatID ) { bool bAdded = false; // Check if all profiler instances have this stat ready. int32 NumReadyStats = 0; for( auto It = GetProfilerInstancesIterator(); It; ++It ) { const FProfilerSessionRef ProfilerSession = It.Value(); NumReadyStats += ProfilerSession->GetAggregatedStat(StatID) != nullptr ? 1 : 0; } const bool bStatIsReady = NumReadyStats == GetProfilerInstancesNum(); if( StatID != 0 && bStatIsReady ) { FTrackedStat* TrackedStat = TrackedStats.Find( StatID ); if( TrackedStat == nullptr ) { // R = H, G = S, B = V const FLinearColor& ColorAverage = GetColorForStatID( StatID ); const FLinearColor ColorAverageHSV = ColorAverage.LinearRGBToHSV(); FLinearColor ColorBackgroundHSV = ColorAverageHSV; ColorBackgroundHSV.G = FMath::Max( 0.0f, ColorBackgroundHSV.G-0.25f ); FLinearColor ColorExtremesHSV = ColorAverageHSV; ColorExtremesHSV.G = FMath::Min( 1.0f, ColorExtremesHSV.G+0.25f ); ColorExtremesHSV.B = FMath::Min( 1.0f, ColorExtremesHSV.B+0.25f ); const FLinearColor ColorBackground = ColorBackgroundHSV.HSVToLinearRGB(); const FLinearColor ColorExtremes = ColorExtremesHSV.HSVToLinearRGB(); TrackedStat = &TrackedStats.Add( StatID, FTrackedStat(CreateCombinedGraphDataSource( StatID ),ColorAverage,ColorExtremes,ColorBackground,StatID) ); bAdded = true; // @TODO: Convert a reference parameter to copy parameter/sharedptr/ref/weak, to avoid problems when a reference is no longer valid. TrackedStatChangedEvent.Broadcast( *TrackedStat, true ); } if( TrackedStat != nullptr ) { uint32 NumAddedInstances = 0; bool bMetadataInitialized = false; for( auto It = GetProfilerInstancesIterator(); It; ++It ) { const FGuid& SessionInstanceID = It.Key();// ProfilerSessionInstanceID, ProfilerInstanceID, InstanceID const FProfilerSessionRef ProfilerSession = It.Value(); const bool bInstanceAdded = TrackStatForSessionInstance( StatID, SessionInstanceID ); NumAddedInstances += bInstanceAdded ? 1 : 0; // Initialize metadata for combine graph data source. // TODO: This should be checked against the remaining elements to detect inconsistent data. // The first instance should be the main. if( !bMetadataInitialized ) { const bool bIsStatReady = ProfilerSession->GetMetaData()->IsStatInitialized( StatID ); if( bIsStatReady ) { const FProfilerStatMetaDataRef MetaData = ProfilerSession->GetMetaData(); const FProfilerStat& Stat = MetaData->GetStatByID( StatID ); const FProfilerGroup& Group = Stat.OwningGroup(); TrackedStat->CombinedGraphDataSource->Initialize( Stat.Name().GetPlainNameString(), Group.ID(), Group.Name().GetPlainNameString(), Stat.Type(), ProfilerSession->GetCreationTime() ); bMetadataInitialized = true; } } } } } return bAdded; }