Bug#1020937: libgtk-3-0: fix gl on GLES-only platforms

[Dominique Martinet]

Hi,

Dominique Martinet wrote on Thu, Sep 29, 2022 at 08:42:40AM +0900:
> when using GTK on platforms with a GLES-only GL implementation like some
> raspberry pi or iMX platforms with vivante driver, GTK fails to
> initialize its GL stack because it tries to bind to regular GL first
> anyway before using the correct API as configured.
> 
> This can be tested by running gtk3-demo and the OpenGL area demo, which
> will show nothing as no GL implementation could be found -- but it also
> affects real GTK applications like epiphany (gnome web).
> 
> This was reported upstream a couple of years ago:
> https://gitlab.gnome.org/GNOME/gtk/-/issues/3028
> and I submitted a patch yesterday:
> https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/5062

This merge request has been merged, so I'd like to move this bug forward:
https://gitlab.gnome.org/GNOME/gtk/-/commit/0e5fe45ea20cce074a128911949dbedf4f8265bf

Is there any opposition to backporting it to debian stable (eventually
on next point update as this isn't a security fix, I'm not sure what the
exact process is here) ?


I'll be happy to do the actual package update work (adding the patch,
verifying it applies etc) but I don't want to step on any toes, so any
input is appreciated :)

Thanks!
-- 
Dominique Martinet