Package: emacs;
Reported by: Visuwesh <visuweshm <at> gmail.com>
Date: Thu, 31 Mar 2022 03:38:01 UTC
Severity: normal
Merged with 73752
Found in versions 29.0.50, 29.4
Fixed in version 30.1
Done: Eli Zaretskii <eliz <at> gnu.org>
Bug is archived. No further changes may be made.
Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
From: Visuwesh <visuweshm <at> gmail.com> To: bug-gnu-emacs <at> gnu.org Subject: 29.0.50; set-fontset-font and font clipping issues Date: Thu, 31 Mar 2022 09:07:30 +0530
[Message part 1 (text/plain, inline)]
I have the following line [1] in my init.el to make Emacs use "Kurinto
Seri" for the Tamil script,
(set-fontset-font t 'tamil "Kurinto Seri")
and this leads to font "clipping" issues. The text is shaped properly
in that it combines the diacritics but I see "clipping" problems
instead. See screenshot below:
[screenshot_202203310850.png (image/png, inline)]
[Message part 3 (text/plain, inline)]
I type C-x C-+, then the clipping problem goes away until I increase the font size again a bit and the problem gets worse:
[screenshot_202203310853.png (image/png, inline)]
[Message part 5 (text/plain, inline)]
I cannot seem to reproduce this from emacs -Q, nor do I see this issue
when I start Emacs up (I use the daemon if that makes a difference [2]).
It naturally shows up after using Emacs for a while, sometimes reopening
the frame fixes the clipping problems, sometimes I have to reevaluate
the set-fontset-font form to fix it. And this issue isn't font-specific
as well: I had the same problem with "Noto Serif." I would highly any
hints towards nailing the problem down; I'm really out of ideas.
If I didn't make it clear, there are no such problems if I don't modify
the default fontset.
[1] I also modify the default fontset for other scripts,
(set-fontset-font t 'mathematical "Kurinto Mono" nil 'prepend)
(set-fontset-font t 'mathematical "Latin Modern Math" nil 'append)
(set-fontset-font t 'symbol "Latin Modern Math" nil 'append)
(set-fontset-font t 'emoji "Kurinto Mono")
(set-fontset-font t 'emoji "Kurinto Sans" nil 'append)
(set-fontset-font t 'emoji "DejaVu Sans" nil 'append)
and I set the language and the locale environment to Tamil and
ta_IN.utf8 respectively, before modifying the fontset.
[2] Modifying the fontset in `server-after-make-frame-hook' does not
make a difference. I don't see the issue when I do not use the
daemon but I believe I haven't run the non-daemon session long
enough.
In GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo version 1.16.0, Xaw scroll bars)
Repository revision: ca3858563c7ba8ee3caa82fbd2b7c386ea60c0d3
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12013000
System Description: NixOS 21.11 (Porcupine)
Configured using:
'configure
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--disable-build-details --with-modules --with-x-toolkit=lucid
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