/** Clears and optionally backs up all references to renderer module classes in other modules, particularly engine. */
void ClearReferencesToRendererModuleClasses(
TMap<UWorld*, bool>& WorldsToUpdate,
TMap<FMaterialShaderMap*, TScopedPointer<TArray<uint8> > >& ShaderMapToSerializedShaderData,
TScopedPointer<TArray<uint8> >& GlobalShaderData,
TMap<FShaderType*, FString>& ShaderTypeNames,
TMap<FVertexFactoryType*, FString>& VertexFactoryTypeNames)
{
// Destroy all renderer scenes
for (TObjectIterator<UWorld> WorldIt; WorldIt; ++WorldIt)
{
UWorld* World = *WorldIt;
if (World->Scene)
{
WorldsToUpdate.Add(World, World->FXSystem != NULL);
for (int32 LevelIndex = 0; LevelIndex < World->GetNumLevels(); LevelIndex++)
{
ULevel* Level = World->GetLevel(LevelIndex);
Level->ReleaseRenderingResources();
}
if (World->FXSystem != NULL)
{
FFXSystemInterface::Destroy(World->FXSystem);
World->FXSystem = NULL;
}
World->Scene->Release();
World->Scene = NULL;
}
}
// Save off shaders by serializing them into memory, and remove all shader map references to FShaders
GlobalShaderData = TScopedPointer<TArray<uint8> >(BackupGlobalShaderMap(GRHIShaderPlatform_DEPRECATED));
UMaterial::BackupMaterialShadersToMemory(ShaderMapToSerializedShaderData);
// Verify no FShaders still in memory
for(TLinkedList<FShaderType*>::TIterator It(FShaderType::GetTypeList()); It; It.Next())
{
FShaderType* ShaderType = *It;
check(ShaderType->GetNumShaders() == 0);
ShaderTypeNames.Add(ShaderType, ShaderType->GetName());
}
for(TLinkedList<FVertexFactoryType*>::TIterator It(FVertexFactoryType::GetTypeList()); It; It.Next())
{
FVertexFactoryType* VertexFactoryType = *It;
VertexFactoryTypeNames.Add(VertexFactoryType, VertexFactoryType->GetName());
}
// Destroy misc renderer module classes and remove references
FSceneViewStateReference::DestroyAll();
FSlateApplication::Get().InvalidateAllViewports();
// Invalidate cached shader type data
UninitializeShaderTypes();
// Delete pending cleanup objects to remove those references, which are potentially renderer module classes
FPendingCleanupObjects* PendingCleanupObjects = GetPendingCleanupObjects();
delete PendingCleanupObjects;
GEngine->EngineLoop->ClearPendingCleanupObjects();
ResetCachedRendererModule();
}
