void FD3D12DynamicRHI::UnlockBuffer(FRHICommandListImmediate* RHICmdList, BufferType* Buffer)
{
// Find the outstanding lock for this Buffer.
FD3D12LockedKey LockedKey(Buffer);
FD3D12LockedData* LockedData = FindInOutstandingLocks(LockedKey);
check(LockedData);
// Determine whether the buffer is dynamic or not.
const bool bIsDynamic = (Buffer->GetUsage() & BUF_AnyDynamic) ? true : false;
if (bIsDynamic)
{
// If the Buffer is dynamic, its upload heap memory can always stay mapped. Don't do anything.
}
else
{
// If the static Buffer lock involved a staging resource, it was locked for reading.
if (LockedData->StagingResource)
{
// Unmap the staging buffer's memory.
ID3D12Resource* StagingBuffer = LockedData->StagingResource.GetReference()->GetResource();
StagingBuffer->Unmap(0, nullptr);
}
else
{
// Copy the contents of the temporary memory buffer allocated for writing into the Buffer.
FD3D12ResourceLocation* UploadHeapLocation = LockedData->UploadHeapLocation.GetReference();
// If we are on the render thread, queue up the copy on the RHIThread so it happens at the correct time.
if (ShouldDeferBufferLockOperation(RHICmdList))
{
new (RHICmdList->AllocCommand<FRHICommandUpdateBuffer>()) FRHICommandUpdateBuffer(Buffer->ResourceLocation, UploadHeapLocation, LockedData->Pitch);
}
else
{
UpdateBuffer(Buffer->ResourceLocation->GetResource(),
Buffer->ResourceLocation->GetOffset(), UploadHeapLocation->GetResource(), UploadHeapLocation->GetOffset(), LockedData->Pitch);
}
}
}
// Remove the FD3D12LockedData from the lock map.
// If the lock involved a staging resource, this releases it.
RemoveFromOutstandingLocks(LockedKey);
}
void Execute(FRHICommandListBase& CmdList)
{
FD3D12DynamicRHI::GetD3DRHI()->UpdateBuffer(Destination->GetResource(), Destination->GetOffsetFromBaseOfResource() + DestinationOffset, Source.GetResource(), Source.GetOffsetFromBaseOfResource(), NumBytes);
}