glamor woes with nouveau

[Adam Jackson]

On Tue, 2017-01-17 at 14:33 +0100, Olivier Fourdan wrote:
> Hi all,
> 
> I am trying to investigate an issue with Xwayland that affects pixmap
> rendering only some hardware with nouveau (basically, older
> hardware). 
> 
> Initally, I started looking into this because of reported black icons
> in gtk2 (X11/Xwayland) apps in GNOME and RH bugzilla, and discovered
> that one possible common factor is the use on nouveau:
> 
>   https://bugzilla.redhat.com/show_bug.cgi?id=1411447
>   https://bugzilla.gnome.org/show_bug.cgi?id=776255   

This is tickling a memory that there's some path through gtk where we
use a pixmap as its own alpha map, that glamor has to fall back for
because we don't know how to do texture views. If that's the case here
(and we're merely also failing at the fallback) it'd be even more
incentive to get texture views working.

- ajax