GNU bug report logs - #77988
31.0.50; No more images after fullscreen and load-theme

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Alan Third <alan <at> idiocy.org>
Cc: 77988 <at> debbugs.gnu.org, luangruo <at> yahoo.com, eg642616 <at> gmail.com, manuel <at> ledu-giraud.fr
Subject: bug#77988: 31.0.50; No more images after fullscreen and load-theme
Date: Wed, 21 May 2025 14:28:46 +0300

> Date: Tue, 20 May 2025 21:58:26 +0100
> From: Alan Third <alan <at> idiocy.org>
> Cc: Elijah Gabe Pérez <eg642616 <at> gmail.com>,
> 	77988 <at> debbugs.gnu.org, manuel <at> ledu-giraud.fr,
> 	Po Lu <luangruo <at> yahoo.com>
> 
> On Fri, May 16, 2025 at 10:22:36AM +0300, Eli Zaretskii wrote:
> > > From: Elijah Gabe Pérez <eg642616 <at> gmail.com>
> > > Cc: 77988 <at> debbugs.gnu.org,  manuel <at> ledu-giraud.fr
> > > Date: Thu, 15 May 2025 22:54:24 -0600
> > > 
> > > Eli Zaretskii <eliz <at> gnu.org> writes:
> > > 
> > > >> From: Elijah Gabe Pérez <eg642616 <at> gmail.com>
> > > >> Cc: manuel <at> ledu-giraud.fr,  77988 <at> debbugs.gnu.org
> > > >> Date: Wed, 14 May 2025 12:47:54 -0600
> > > >> 
> > > >> Eli Zaretskii <eliz <at> gnu.org> writes:
> > > >> 
> > > >> > Ping! Could someone please reproduce this?
> > > >> 
> > > >> Yep, i could reproduce this, I've noticed that reproducing this on a
> > > >> Cairo build (with same build options) seems to fix it.
> > > >
> > > > Since Manuel explicitly says this is a Lucid-only issue, this is
> > > > expected.
> > > >
> > > > Are you able to debug this to figure out why the problem happens in
> > > > the Lucid build?
> > > 
> > > Yes, I can.
> > 
> > Thanks, adding Alan to the discussion, in case he has comments or
> > ideas.
> 
> I think it's an issue at the display end. As Elijah says, if Cairo is
> enabled it doesn't happen.
> 
> Reverting commit 6ea69fc7340e48cf73df351a544c1d8946395b3d seems to
> make the problem go away. Cairo doesn't use the x_composite_image
> function. It looks like the destination parameter is not always valid.
> I had a look and it's usually populated from FRAME_X_PICTURE (s->f)
> but a quick investigation left me none-the-wiser as to where THAT is
> set and why it might go bad.

Thanks.

Po Lu, could you please take a look at this, in case your commit has
some problem in the Lucid build?

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