Question/feature request: NVidia VRWorks extensions

[XenoPL]

Hello,
I haven't seen noted as implemented, hence the question.
Would it be possible to implement NVAPI DX11 Variable Rate Shading via translation to generic Vulkan extensions?
https://developer.nvidia.com/vrworks/graphics/variablerateshading

It could help DX11 VR apps, that can do foveated rendering.

[jp7677]

Thanks for your question. To be honest, chances are very small that someone will find the motivation and time to fully implement this. It looks like the NVAPI headers we use, do have the definitions for ID3DNvVRSHelper but I don't know if this would fit the Vulkan side. Additionally most of the work would have to happen on the DXVK side and that is, as far as I can say, not likely to happen since this is quite a niche case and very vendor specific.

[XenoPL]

For sure I have no expectations, but if it would be possible to implement it with generic Vulkan code, that'd be a great boon for many DX11 VR apps, as VRS was never part of DX11 and NVAPI is the only way to have it for foveated rendering. Assuming no NVidia specific extensions would be used, that code should work on any Vulkan capable GPU, not just GTX/RTX.
And tha's quite important part as today VR headsets can bring RX 7900XTX or 4080/5080 to its knees. Rendering images at over 3k x 3k per eye resolution is no joke.