How to check if OpenGL is supported?

[Pekka Paalanen]

On Tue, 10 Sep 2013 16:49:27 +1000
Campbell Barton <ideasman42 at gmail.com> wrote:

> On Tue, Sep 10, 2013 at 4:45 PM, Pekka Paalanen <ppaalanen at gmail.com>
> wrote:
> > On Tue, 10 Sep 2013 16:13:32 +1000
> > Campbell Barton <ideasman42 at gmail.com> wrote:
> >
> >> On Tue, Sep 10, 2013 at 3:49 PM, Pekka Paalanen
> >> <ppaalanen at gmail.com> wrote:
> >> > On Tue, 10 Sep 2013 14:06:55 +1000
> >> > Campbell Barton <ideasman42 at gmail.com> wrote:
> >> >
> >> >> Hi, I'm interested to get Blender (OpenGL 3d graphics
> >> >> application) running with wayland/weston.
> >> >>
> >> >> However I cant tell if my configuration can even run simple
> >> >> OpenGL applications (the more recent weston for arch-linux
> >> >> 1.2.2 has no "weston-gears").
> >> >>
> >> >> Whats a good way to see if loading opengl/egl applications is
> >> >> supported?
> >> >>
> >> >> Some more info in case it helps.
> >> >> ----
> >> >>
> >> >> A while back I managed to run weston but no opengl applications
> >> >> would work (weston-gears for example didn't start but
> >> >> weston-smoke did, It gave some error about not being able to
> >> >> setup EGL). I spent some time trying to get this running but I
> >> >> think it simply wasn't supported by proprietary-nvidia & mesa
> >> >> configuration.
> >> >>
> >> >> More recently I tried again with a newer weston but now I cant
> >> >> find weston-gears so not sure how to test.
> >> >>
> >> >> There is a git repo that Wander Costa has been working on, but
> >> >> its crashing on my system (opengl context fails to initialize).
> >> >> https://github.com/walac/blender-wayland
> >> >>
> >> >> So I want to know if this is a bug in the code or just a
> >> >> limitation with my configuration.
> >> >>
> >> >
> >> > Hi,
> >> >
> >> > if you are still on proprietary Nvidia GeForce drivers, then
> >> > Wayland GL applications have no chances of working at all.
> >> >
> >> > The basic test for openGL support (well, GLES 2.0 really, but it
> >> > doesn't matter which flavour of GL you test) is the
> >> > (weston-)simple-egl program from the Weston repository.
> >> >
> >> >
> >> > Thanks,
> >> > pq
> >>
> >> Strange, weston-simple-egl works,
> >>
> >> It prints output about EGL, linked.
> >> http://www.pasteall.org/45482
> >>
> >> But I'm not sure if this is using similar enough features to
> >> Blender that the OpenGL context is comparable (Blender uses full
> >> OpenGL but has an EGL option to support opening a window for
> >> wayland support).
> >
> > Your paste of the Weston log says it is using a software GL
> > implementation of Mesa: llvmpipe. IOW, that is not using your GPU.
> >
> > I should have been more accurate: of course software GL
> > implementations have a chance of working, and it's nice to see it
> > actually does work at least that much. :-)
> >
> > But I assume software GL was not what you were looking for, right?
> >
> >
> > Thanks,
> > pq
> 
> Software OpenGL is fine if I can use it to get Blender window up and
> running in weston.
> I've used Blender with mesa's 'swrast' before on X11 and it runs fine
> as long as GLSL isnt used,
> so I know this works - but not sure if llvmpipe does. (it should, we
> only require OpenGL 1.4x).

Oh, ok. The next thing coming to my mind is that you somehow managed to
get libGLESv2.so and libEGL.so from Mesa, but libGL.so from the Nvidia
proprietary package. That would cause simple-egl and Weston to work,
but fail all big GL apps on Wayland.

Maybe check that? You'd need libGL.so (and perhaps others?) from Mesa
to be able to run big GL apps with software GL on Wayland.


Thanks,
pq