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Access to lower level HAL #782

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@hmaarrfk

I read about https://docs.rs/wgpu-hal/latest/wgpu_hal/

and how it might be useful to take a buffer from WGPU and to send it to an other pipeline (perhaps cupy or other cuda accelerated workflow).

Is there any value to this?

I would like to avoid

GPU -> CPU -> GPU just to "move things in and out of WGPU" but not sure how stable the wgpu-hal is and how it would fit into wgpu-py.

Thx for your thoughts.

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