ImmediateContext->CopyTexture failed to copy stencil bits in D3D12

[hzqst]

RenderDoc .rdc -> https://hzqst.oss-cn-hangzhou.aliyuncs.com/rdc.7z

d3d12 (stencil=0 after copy):

vk (stencil=0x41 after copy):

d3d11 (stencil=0x41 after copy):

gl (stencil=0x41 after copy):

Given the information from https://learn.microsoft.com/en-us/windows/win32/direct3d12/subresources#plane-slice

The subresource index should be filled with correct value to copy stencil bits, instead of 0 here.

I will perfer a bool CopyDepthBits; and a bool CopyStencilBits; in the Diligent::CopyTextureAttribs to have full control over copytexture behavior.

btw:

https://learn.microsoft.com/en-us/windows/win32/api/d3d12/nf-d3d12-id3d12graphicscommandlist-copytextureregion

Note that for a depth-stencil buffer, the depth and stencil planes are [separate subresources](https://learn.microsoft.com/en-us/windows/win32/direct3d12/subresources#plane-slice) within the buffer.

To copy an entire resource, rather than just a region of a subresource, we recommend to use [CopyResource](https://learn.microsoft.com/en-us/windows/desktop/api/d3d12/nf-d3d12-id3d12graphicscommandlist-copyresource) instead.

CopyResource in D3D12

and

CopyResource in D3D11

is recommended in this scenario, however I found no wrapper around this in DiligentEngine.

[TheMostDiligent]

Are you trying to copy stencil part from depth-stencil format to R8_UINT texture?

[hzqst]

Are you trying to copy stencil part from depth-stencil format to R8_UINT texture?

I am trying to copy a D24S8 (with both depth bits and stencil bits) to another D24S8, with exact the same size and format.

[TheMostDiligent]

OK, I see the problem: there needs to be two copies for depth and stencil planes.

https://learn.microsoft.com/en-us/windows/win32/direct3d12/subresources#plane-slice

Depth-Stencil is the only format that fully supports mipmaps, arrays, and multiple planes (often plane 0 for Depth and plane 1 for Stencil).

Wondering, what would the not-so-often plane be for depth and stencil