WRAPPED_GPU_POINTER RaytracingDevice::GetWrappedPointerFromGpuVA(D3D12_GPU_VIRTUAL_ADDRESS)
{
// Should never be called when using the Fallback Layer
ThrowFailure(E_INVALIDARG,
L"GetWrappedPointerFromGpuVA is invalid when using the compute-based Fallback. Apps should either use GetWrappedPointerSimple or "
L"GetWrappedPointerFromDescriptorHeapIndex() if it's been verified that ID3D12RaytracingFallbackDevice::UsingRaytracingDriver() == false");
return {};
}
void LoadInstancesPass::LoadInstances(ID3D12GraphicsCommandList *pCommandList,
D3D12_GPU_VIRTUAL_ADDRESS outputBVH,
D3D12_GPU_VIRTUAL_ADDRESS instancesDesc,
D3D12_ELEMENTS_LAYOUT instanceDescLayout,
UINT numElements,
D3D12_GPU_DESCRIPTOR_HANDLE descriptorHeapBase,
D3D12_GPU_VIRTUAL_ADDRESS cachedSortBuffer)
{
if (numElements == 0) return;
const bool performUpdate = cachedSortBuffer != 0;
pCommandList->SetComputeRootSignature(m_pRootSignature);
ID3D12PipelineState *pLoadAABBPSO = nullptr;
switch (instanceDescLayout)
{
case D3D12_ELEMENTS_LAYOUT_ARRAY:
pLoadAABBPSO = m_pLoadAABBsFromArrayOfInstancesPSO;
break;
case D3D12_ELEMENTS_LAYOUT_ARRAY_OF_POINTERS:
pLoadAABBPSO = m_pLoadAABBsFromArrayOfPointersPSO;
break;
default:
ThrowFailure(E_INVALIDARG, L"Unrecognized D3D12_ELEMENTS_LAYOUT provided");
}
pCommandList->SetPipelineState(pLoadAABBPSO);
LoadInstancesConstants constants = { numElements, (UINT) performUpdate };
pCommandList->SetComputeRoot32BitConstants(Constants, SizeOfInUint32(LoadInstancesConstants), &constants, 0);
pCommandList->SetComputeRootDescriptorTable(GlobalDescriptorHeap, descriptorHeapBase);
pCommandList->SetComputeRootShaderResourceView(InstanceDescsSRV, instancesDesc);
pCommandList->SetComputeRootUnorderedAccessView(OutputBVHRootUAV, outputBVH);
if (performUpdate)
{
pCommandList->SetComputeRootUnorderedAccessView(CachedSortBuffer, cachedSortBuffer);
}
const UINT dispatchWidth = DivideAndRoundUp<UINT>(numElements, THREAD_GROUP_1D_WIDTH);
pCommandList->Dispatch(dispatchWidth, 1, 1);
auto uavBarrier = CD3DX12_RESOURCE_BARRIER::UAV(nullptr);
pCommandList->ResourceBarrier(1, &uavBarrier);
}