[Spice-devel] OpenGL "passthrough"

[Alon Levy]

On Thu, Nov 10, 2011 at 08:27:52AM +0200, Yonit Halperin wrote:
> On 11/09/2011 07:06 PM, Alon Levy wrote:
> >On Wed, Nov 09, 2011 at 04:57:23PM +0000, Mosebach  Kai wrote:
> >>Both would be very helpful :-) And important from a market/competitive
> >>point of view.
> >>
> >>Please let me have a look at the patches if possible,
> >>
> Afaik, there is an experimental code for OpenGL hardware
> acceleration on the server side and on the client side as well. Look
> for #ifdefs USE_OPENGL. I think that there were problems with the hw
> acceleration on the server side since the rendering results were
> different than the ones expected for the windows guest.
> 

This is just acceleration of 2d rendering using OpenGL, not what the
poster meant.

> Yonit.
> >
> >I'm so far from that the mere mention of it here was just a result of
> >asking. It is a thought of a thought.
> >
> >>Thanks Kai
> >>
> >>On 11/9/11 5:54 PM, "Alon Levy"<alevy at redhat.com>  wrote:
> >>
> >>>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
> >>>>>>full
> >>>>>>VGA passthrough) to just
> >>>>>>pass the OpenGL interface/access into the VMs QXL Adapter making this
> >>>>>>one
> >>>>>>(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
> >>>>>>
> >>>>>>_______________________________________________
> >>>>>>Spice-devel mailing list
> >>>>>>Spice-devel at lists.freedesktop.org
> >>>>>>http://lists.freedesktop.org/mailman/listinfo/spice-devel
> >>>>
> >>
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> 
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