x11/GLX/GL on top of wayland

Jasper St. Pierre jstpierre at mecheye.net
Fri Jul 4 07:31:53 PDT 2014

It's at a lower level than translating GLX to EGL. The client renders into
specific card-buffers given its hardware-specific drivers inside mesa, and
then passes a handle to those buffers to what it thinks is the X server
using the DRI3 protocol. Xwayland can in turn pass those buffers to the
real Wayland compositor using the secret wl_drm interface.

I'm told that the nouveau and radeon drivers now have support for DRI3 as
of last week.

On Fri, Jul 4, 2014 at 10:17 AM, Sylvain BERTRAND <sylware at legeek.net>

> On Fri, Jul 04, 2014 at 09:48:20AM -0400, Jasper St. Pierre wrote:
> > Xwayland has DRI3/Present support, which means that any app that uses
> DRI3
> > will work fine under it. Right now, this is the Intel driver, with
> support
> > for the other FOSS drivers coming soon.
> >
> > Otherwise, we fall back to non-hardware-accelerated codepaths. It won't
> > break, but it will mean that you won't get hardware-accelerated
> rendering.
> This is good news.
> I need just a bit more of your lights on the matter: the wayland dri3
> driver is
> intel specific. You mean that it needs hw specific paths? The
> mapping of xorg/glx/GL calls into wayland/egl/gl must inclue hw
> specifities?
> --
> Sylvain

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