public H1DescriptorAllocator(H1DescriptorHeapType type)
{
m_HeapType = type;
m_RemainingFreeHandles = 0;
ConstructPlatformDependentMembers();
}
protected DescriptorHeap RequestNewHeap(H1DescriptorHeapType type)
{
DescriptorHeapType typeInDX12 = H1RHIDefinitionHelper.ConvertToDescriptorHeapType(type);
// @TODO - need to be thread-safe
DescriptorHeapDescription desc = new DescriptorHeapDescription();
desc.Type = typeInDX12;
desc.DescriptorCount = NumDescriptorsPerHeap;
// this part is none, but for usage in command context, you need to create new descriptor for shader-visible by UserDescriptorHeap or DynamicDescriptorHeap
desc.Flags = DescriptorHeapFlags.None;
desc.NodeMask = 1;
DescriptorHeap newHeap = m_Device.CreateDescriptorHeap(desc);
m_DescriptorHeapPool.Add(newHeap);
return(newHeap);
}
public static SharpDX.Direct3D12.DescriptorHeapType ConvertToDescriptorHeapType(H1DescriptorHeapType descriptorHeapType)
{
SharpDX.Direct3D12.DescriptorHeapType result = new SharpDX.Direct3D12.DescriptorHeapType();
switch (descriptorHeapType)
{
case H1DescriptorHeapType.ConstantBufferView_ShaderResourceView_UnorderedAccessView:
result = SharpDX.Direct3D12.DescriptorHeapType.ConstantBufferViewShaderResourceViewUnorderedAccessView;
break;
case H1DescriptorHeapType.Sampler:
result = SharpDX.Direct3D12.DescriptorHeapType.Sampler;
break;
case H1DescriptorHeapType.RenderTargetView:
result = SharpDX.Direct3D12.DescriptorHeapType.RenderTargetView;
break;
case H1DescriptorHeapType.DepthStencilView:
result = SharpDX.Direct3D12.DescriptorHeapType.DepthStencilView;
break;
}
return(result);
}
public CpuDescriptorHandle AllocateDescriptor(H1DescriptorHeapType type, Int32 count = 1)
{
return(m_DescriptorAllocators[Convert.ToInt32(type)].Allocate(count));
}
