Wayland and GLES1 (Re: R200 DRM/KMS)

[Steven Newbury]

On Thu Jul 9 16:04:35 2015 GMT+0100, Alex Deucher wrote:
> On Thu, Jul 9, 2015 at 2:58 AM, Steven Newbury <steve at snewbury.org.uk> wrote:
> >
> >
> > On Thu Jul 9 03:32:40 2015 GMT+0100, Michel Dänzer wrote:
> >> On 09.07.2015 06:01, Steven Newbury wrote:
> >> > On Wed, 2015-07-08 at 21:56 +0100, Steven Newbury wrote:
> >> >> On Tue, 2015-07-07 at 09:18 +0300, Pekka Paalanen wrote:
> >> >>> On Mon, 06 Jul 2015 22:50:30 +0100 Steven Newbury
> >> >>> <steve at snewbury.org.uk> wrote:
> >> >>>
> >> >>>> Would gles1 be sufficient to run a Wayland compositor, I'm
> >> >>>> guessing probably not..?
> >> >>>
> >> >>> If you can find a Wayland compositor that is written to composite
> >> >>>  with GLES1, that's all you need from the "Wayland side". (Yeah,
> >> >>> this has nothing to do with Wayland per se.) Compositing in
> >> >>> itself without any effects is very simple, as long as you get the
> >> >>> textures up.
> >> >>>
> >> >>> Or, if you find a Wayland compositor written to use desktop
> >> >>> OpenGL for compositing and does not use features your GL driver
> >> >>> does not expose, that's good too.
> >> >>>
> >> >> Is desktop OpenGL accessible from "EGL_PLATFORM=drm"?
> >> >>
> >> > To answer my own question, it seems that is possible.  I wonder if
> >> > it works with mutter/cogl???
> >>
> >> It does.
> >>
> >> However, your problem seems rather that gnome-shell/mutter doesn't
> >> support R200 anymore.
> > Yes, that's true. I wonder if I can revert the incompatible change or better create a env variable to revert to the compatible behaviour or something? I'll need to take a look...
> 
> I'm not sure how valid this is any more:
> https://bugs.freedesktop.org/show_bug.cgi?id=51658
> 
> Basic issue is that r1xx/r2xx hw only has a limited number of render
> buffer formats while they support a lot of texture formats.  Gnome
> shell expects to be able to render to the same formats they can
> texture from.
> 
It looks like a bit of a hack, it's a pity to lose valid texture formats, but I've applied the patches from the bug after a little manual intervention. It's building now, will take some time!  
-- 
Sent from my Jolla