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Re: Support for background transparency

From: Lars Ingebrigtsen
Subject: Re: Support for background transparency
Date: Sun, 28 Nov 2021 14:41:05 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux)

HÃ¥kon Flatval <hkon20@hotmail.com> writes:

> I've attached a patch that implements basic support for background
> transparency. I have only considered GDK+Cairo build configurations here, as a
> start.

That's really cool.  It seems to work fine here (Debian/bookworm), but
with these compilation warnings.

xterm.c: In function 'x_clear_rectangle':
xterm.c:1107:12: warning: unused variable 'dpy' [-Wunused-variable]
 1107 |   Display *dpy = FRAME_X_DISPLAY (f);
      |            ^~~
xterm.c:1106:13: warning: unused variable 'xgcv' [-Wunused-variable]
 1106 |   XGCValues xgcv;
      |             ^~~~

> Newbie question: I can't guarantee that this patch works perfectly
> with all build variations using GDK+Cairo, nor in all (desktop)
> environments where Emacs might be used. How, in general, is Emacs
> tested before release to ensure (most) such edge cases are caught?

We put the code into the development tree and wait for people to report
problems.  😀

> I'm currently working on implementing this feature for other XLib-based build
> configurations too, offline, planning to submit another patch for those in the
> not-so-distant future.


Have you started the FSF copyright assignment process?

(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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