void FShaderUniformBufferParameter::Bind(const FShaderParameterMap& ParameterMap,const TCHAR* ParameterName,EShaderParameterFlags Flags)
{
uint16 UnusedBaseIndex = 0;
uint16 UnusedNumBytes = 0;
#if UE_BUILD_DEBUG
bInitialized = true;
#endif
if(!ParameterMap.FindParameterAllocation(ParameterName,BaseIndex,UnusedBaseIndex,UnusedNumBytes))
{
bIsBound = false;
if(Flags == SPF_Mandatory)
{
if (!UE_LOG_ACTIVE(LogShaders, Log))
{
UE_LOG(LogShaders, Fatal,TEXT("Failure to bind non-optional shader resource parameter %s! The parameter is either not present in the shader, or the shader compiler optimized it out."),ParameterName);
}
else
{
// We use a non-Slate message box to avoid problem where we haven't compiled the shaders for Slate.
FPlatformMisc::MessageBoxExt( EAppMsgType::Ok, *FText::Format(
NSLOCTEXT("UnrealEd", "Error_FailedToBindShaderParameter", "Failure to bind non-optional shader parameter {0}! The parameter is either not present in the shader, or the shader compiler optimized it out. This will be an assert with LogShaders suppressed!"),
FText::FromString(ParameterName)).ToString(), TEXT("Warning"));
}
}
}
else
{
bIsBound = true;
}
}
void BuildResourceTableMapping(
const TMap<FString,FResourceTableEntry>& ResourceTableMap,
const TMap<FString,uint32>& ResourceTableLayoutHashes,
TBitArray<>& UsedUniformBufferSlots,
FShaderParameterMap& ParameterMap,
FShaderResourceTable& OutSRT)
{
check(OutSRT.ResourceTableBits == 0);
check(OutSRT.ResourceTableLayoutHashes.Num() == 0);
// Build resource table mapping
int32 MaxBoundResourceTable = -1;
TArray<uint32> ResourceTableSRVs;
TArray<uint32> ResourceTableSamplerStates;
TArray<uint32> ResourceTableUAVs;
for( auto MapIt = ResourceTableMap.CreateConstIterator(); MapIt; ++MapIt )
{
const FString& Name = MapIt->Key;
const FResourceTableEntry& Entry = MapIt->Value;
uint16 BufferIndex, BaseIndex, Size;
if (ParameterMap.FindParameterAllocation( *Name, BufferIndex, BaseIndex, Size ) )
{
ParameterMap.RemoveParameterAllocation(*Name);
uint16 UniformBufferIndex = INDEX_NONE, UBBaseIndex, UBSize;
if (ParameterMap.FindParameterAllocation(*Entry.UniformBufferName, UniformBufferIndex, UBBaseIndex, UBSize) == false)
{
UniformBufferIndex = UsedUniformBufferSlots.FindAndSetFirstZeroBit();
ParameterMap.AddParameterAllocation(*Entry.UniformBufferName,UniformBufferIndex,0,0);
}
OutSRT.ResourceTableBits |= (1 << UniformBufferIndex);
MaxBoundResourceTable = FMath::Max<int32>(MaxBoundResourceTable, (int32)UniformBufferIndex);
while (OutSRT.ResourceTableLayoutHashes.Num() <= MaxBoundResourceTable)
{
OutSRT.ResourceTableLayoutHashes.Add(0);
}
OutSRT.ResourceTableLayoutHashes[UniformBufferIndex] = ResourceTableLayoutHashes.FindChecked(Entry.UniformBufferName);
auto ResourceMap = FRHIResourceTableEntry::Create(UniformBufferIndex, Entry.ResourceIndex, BaseIndex);
switch( Entry.Type )
{
case UBMT_TEXTURE:
OutSRT.TextureMap.Add(ResourceMap);
break;
case UBMT_SAMPLER:
OutSRT.SamplerMap.Add(ResourceMap);
break;
case UBMT_SRV:
OutSRT.ShaderResourceViewMap.Add(ResourceMap);
break;
case UBMT_UAV:
OutSRT.UnorderedAccessViewMap.Add(ResourceMap);
break;
default:
check(0);
}
}
}
OutSRT.MaxBoundResourceTable = MaxBoundResourceTable;
}