Syntax
Parameters
NumDescriptors [in]Type: UINT The number of descriptors to copy. DestDescriptorRangeStart [in]
Type: D3D12_CPU_DESCRIPTOR_HANDLE A D3D12_CPU_DESCRIPTOR_HANDLE that describes the destination descriptors to start to copy to. The destination and source descriptors must be in heaps of the same D3D12_DESCRIPTOR_HEAP_TYPE. SrcDescriptorRangeStart [in]
Type: D3D12_CPU_DESCRIPTOR_HANDLE A D3D12_CPU_DESCRIPTOR_HANDLE that describes the source descriptors to start to copy from.
The SrcDescriptorRangeStart parameter must be in a non shader-visible descriptor heap. This is because shader-visible descriptor heaps may be created in WRITE_COMBINE memory or GPU local memory, which is prohibitively slow to read from. If your application manages descriptor heaps via copying the descriptors required for a given pass or frame from local “storage” descriptor heaps to the GPU-bound descriptor heap, then use shader-opaque heaps for the storage heaps and copy into the GPU-visible heap as required.
Type: D3D12_DESCRIPTOR_HEAP_TYPE The D3D12_DESCRIPTOR_HEAP_TYPE-typed value that specifies the type of descriptor heap to copy with. This is required as different descriptor types may have different sizes. Both the source and destination descriptor heaps must have the same type, else the debug layer will emit an error.
Return value
Type: void None.Remarks
Where applicable, prefer this method to ID3D12Device::CopyDescriptors. It can have a better CPU cache miss rate due to the linear nature of the copy.Requirements
Header: d3d12_xs.h or d3d12_x.hLibrary: d3d12_xs.lib or d3d12_x.lib
Supported Platforms: XBOX Series consoles and XBOX One family