void BeginRecompileGlobalShaders(const TArray<FShaderType*>& OutdatedShaderTypes, EShaderPlatform ShaderPlatform)
{
if( !FPlatformProperties::RequiresCookedData() )
{
// Flush pending accesses to the existing global shaders.
FlushRenderingCommands();
TShaderMap<FGlobalShaderType>* GlobalShaderMap = GetGlobalShaderMap(ShaderPlatform);
for (int32 TypeIndex = 0; TypeIndex < OutdatedShaderTypes.Num(); TypeIndex++)
{
FGlobalShaderType* CurrentGlobalShaderType = OutdatedShaderTypes[TypeIndex]->GetGlobalShaderType();
if (CurrentGlobalShaderType)
{
UE_LOG(LogShaders, Log, TEXT("Flushing Global Shader %s"), CurrentGlobalShaderType->GetName());
GlobalShaderMap->RemoveShaderType(CurrentGlobalShaderType);
//invalidate global bound shader states so they will be created with the new shaders the next time they are set (in SetGlobalBoundShaderState)
for(TLinkedList<FGlobalBoundShaderStateResource*>::TIterator It(FGlobalBoundShaderStateResource::GetGlobalBoundShaderStateList());It;It.Next())
{
BeginUpdateResourceRHI(*It);
}
}
}
VerifyGlobalShaders(ShaderPlatform, false);
}
}
/**
* Forces a recompile of the global shaders.
*/
void RecompileGlobalShaders()
{
if( !FPlatformProperties::RequiresCookedData() )
{
// Flush pending accesses to the existing global shaders.
FlushRenderingCommands();
GetGlobalShaderMap(GRHIShaderPlatform)->Empty();
VerifyGlobalShaders(GRHIShaderPlatform, false);
GShaderCompilingManager->ProcessAsyncResults(false, true);
//invalidate global bound shader states so they will be created with the new shaders the next time they are set (in SetGlobalBoundShaderState)
for(TLinkedList<FGlobalBoundShaderStateResource*>::TIterator It(FGlobalBoundShaderStateResource::GetGlobalBoundShaderStateList());It;It.Next())
{
BeginUpdateResourceRHI(*It);
}
}
}
TShaderMap<FGlobalShaderType>* GetGlobalShaderMap(EShaderPlatform Platform, bool bRefreshShaderMap)
{
// No global shaders needed on dedicated server
if (FPlatformProperties::IsServerOnly())
{
if (!GGlobalShaderMap[Platform])
{
GGlobalShaderMap[Platform] = new TShaderMap<FGlobalShaderType>();
return GGlobalShaderMap[Platform];
}
return NULL;
}
if (bRefreshShaderMap)
{
// delete the current global shader map
delete GGlobalShaderMap[Platform];
GGlobalShaderMap[Platform] = NULL;
// make sure we look for updated shader source files
FlushShaderFileCache();
}
// If the global shader map hasn't been created yet, create it.
if(!GGlobalShaderMap[Platform])
{
// GetGlobalShaderMap is called the first time during startup in the main thread.
check(IsInGameThread());
FScopedSlowTask SlowTask(70);
// verify that all shader source files are intact
SlowTask.EnterProgressFrame(20);
VerifyShaderSourceFiles();
GGlobalShaderMap[Platform] = new TShaderMap<FGlobalShaderType>();
bool bLoadedFromCacheFile = false;
// Try to load the global shaders from a local cache file if it exists
// This method is used exclusively with cooked content, since the DDC is not present
if (FPlatformProperties::RequiresCookedData())
{
SlowTask.EnterProgressFrame(50);
TArray<uint8> GlobalShaderData;
FString GlobalShaderCacheFilename = FPaths::GetRelativePathToRoot() / GetGlobalShaderCacheFilename(Platform);
FPaths::MakeStandardFilename(GlobalShaderCacheFilename);
bLoadedFromCacheFile = FFileHelper::LoadFileToArray(GlobalShaderData, *GlobalShaderCacheFilename, FILEREAD_Silent);
if (!bLoadedFromCacheFile)
{
// Handle this gracefully and exit.
FString SandboxPath = IFileManager::Get().ConvertToAbsolutePathForExternalAppForWrite(*GlobalShaderCacheFilename);
// This can be too early to localize in some situations.
const FText Message = FText::Format( NSLOCTEXT("Engine", "GlobalShaderCacheFileMissing", "The global shader cache file '{0}' is missing.\n\nYou're running a version of the application built to load COOKED content only, however no COOKED content was found. Consider cooking content for this build, or build and run the UNCOOKED version of the application instead."), FText::FromString( SandboxPath ) );
if (FPlatformProperties::SupportsWindowedMode())
{
UE_LOG(LogMaterial, Error, TEXT("%s"), *Message.ToString());
FMessageDialog::Open(EAppMsgType::Ok, Message);
FPlatformMisc::RequestExit(false);
return NULL;
}
else
{
UE_LOG(LogMaterial, Fatal, TEXT("%s"), *Message.ToString());
}
}
FMemoryReader MemoryReader(GlobalShaderData);
SerializeGlobalShaders(MemoryReader, GGlobalShaderMap[Platform]);
}
// Uncooked platform
else
{
FGlobalShaderMapId ShaderMapId(Platform);
TArray<uint8> CachedData;
SlowTask.EnterProgressFrame(40);
const FString DataKey = GetGlobalShaderMapKeyString(ShaderMapId, Platform);
// Find the shader map in the derived data cache
SlowTask.EnterProgressFrame(10);
if (GetDerivedDataCacheRef().GetSynchronous(*DataKey, CachedData))
{
FMemoryReader Ar(CachedData, true);
// Deserialize from the cached data
SerializeGlobalShaders(Ar, GGlobalShaderMap[Platform]);
}
}
// If any shaders weren't loaded, compile them now.
VerifyGlobalShaders(Platform, bLoadedFromCacheFile);
extern int32 GCreateShadersOnLoad;
if (GCreateShadersOnLoad && Platform == GMaxRHIShaderPlatform)
{
for (TMap<FShaderType*, TRefCountPtr<FShader> >::TConstIterator ShaderIt(GGlobalShaderMap[Platform]->GetShaders()); ShaderIt; ++ShaderIt)
{
FShader* Shader = ShaderIt.Value();
if (Shader)
{
Shader->InitializeResource();
}
}
}
}
return GGlobalShaderMap[Platform];
}