Can cassowary work with a second GPU - passthrough?

[buzuddha]

Is your feature request related to a problem? Please describe.
I'm frustrated by choppy rendering of the MS apps. It's not that bad, but I'm guessing it'd be faster if they had access to a dedicated GPU.

Describe the solution you'd like
Could cassowary work in such a way that I passthrough a second GPU to the VM, which can render the windows, and then these are piped back through spice/other to Linux/GNOME?

Describe alternatives you've considered
I'm using virtio+openGL and 3D rendering, but it's still a tidbit choppy.

Additional context
I have experience with GPU passthrough, but don't exactly understand what's going on under the hood with spice. Happy to help develop this!

[buzuddha]

Ok! Got this working! Installed the nvidia drivers and now I can passthrough ms programs from windows into linux! Basically just followed a typical passthrough strategy, changed video virtio -> none and everything works.

Still a bit choppy, looks like 30hz and I'm using a M4000 with a DP -> HDMI to the monitor. I got black boxes if the PT GPU isn't hooked up to a monitor. So the next question is does a 4k60hz DP dummy exist? Perhaps that's not needed. I do see there is a registry edit in windows that can allow for 60hz framerate.