[Spice-devel] OpenGL "passthrough"
alevy at redhat.com
Wed Nov 9 08:54:08 PST 2011
On Wed, Nov 09, 2011 at 03:57:30PM +0000, Mosebach Kai wrote:
> On 11/9/11 3:51 PM, "Alon Levy" <alevy at redhat.com> wrote:
> >On Wed, Nov 09, 2011 at 01:52:12PM +0000, Mosebach Kai wrote:
> >> Hi guys,
> >> Just a though :
> >> In a scenario where a kvm-host system has a openGL capable display
> >> adapter, wouldn't it be possible (and relatively simple compared to a
> >> VGA passthrough) to just
> >> pass the OpenGL interface/access into the VMs QXL Adapter making this
> >> (HW accelerated) OpenGL aware?
> >There are threads in qemu-devel about using pci passthrough for using
> I tried for long time now to pass through PCIe Hardware into the guest
> with all kind of PCIe cards w/o too much off success. So that¹s not what I
> want ;-)
> >the host GPU from the guest. If you actually want to view the results
> >then yes, it's relatively simple in theory. Maybe also in practice, but
> >I've been struggling with a slightly larger problem, doing OpenGL and
> >Direct3D passthrough, for almost a year now, with no results to show :/
> >I do have patches on my harddrive somewhere by Izik Eidos that do a
> >proof of concept for GL passthrough from a windows guest to a
> >windows/linux client, I could ask him if it's ok to post them if you'd
> >like. (and if I can find them).
> >Basically it adds qxl messages for all the GL commands, adds a surface
> >type, tracks all commands from the last SwapBuffers (I guess
> >wglSwapBuffers - the equivalent of glXSwapBuffers) per surface, and
> >passes all of those to the client. Rendering on the server, that is the
> >host, will be a little simpler.
> So (if I got you right and you got me right) we talk about the QXL device
> on the KVM guest receiving OpenGL commands and passing them (thru
> qemu-kvm) downwards to the OpenGL capable hardware on the KVM Host
> (server). The client (spicec or similar) should not be involved at all. Is
> there any work in progress (for rendering on the server) - similar to the
> RemoteFX project of HyperV?
I know I'm working on enabling both server side and client side
rendering, not aware of anyone else.
> Cheers Kai
> >> Thanks for enlightenment,
> >> Kai
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