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From: | GNU bug Tracking System |
Subject: | bug#56695: closed (A new and old font problem with Arabic) |
Date: | Mon, 25 Jul 2022 16:07:02 +0000 |
Your message dated Mon, 25 Jul 2022 19:06:42 +0300 with message-id <83k081dvn1.fsf@gnu.org> and subject line Re: bug#56695: A new and old font problem with Arabic has caused the debbugs.gnu.org bug report #56695, regarding A new and old font problem with Arabic to be marked as done. (If you believe you have received this mail in error, please contact help-debbugs@gnu.org.) -- 56695: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=56695 GNU Bug Tracking System Contact help-debbugs@gnu.org with problems
--- Begin Message ---Subject: A new and old font problem with Arabic Date: Fri, 22 Jul 2022 10:11:16 +0200 (CEST)
Hello,
Since Emacs 28 I have a new problem with Arabic fonts.
1. I can't change the Arabic characters to the font of DejaVu Sans
Mono (or others). This wasn't a problem before.
2. The old one: As you can see the glyphs aren't correct, the '-'
after س is not correctly placed. It's in the place of the glyph of
س. Sometimes I have the opposite problem: gaps between the
characters. It depends usually of 'text-scale-adjust', if I change
the scale the problem can disappear.
(Of course I started Emacs with the '-Q' option.)Attachment: To see the difference: a screenshot in Word/LibreOffice Writer:
In LibreOffice:
1. The font is correct (also for the Arabic characters)
2. The '-' is at the correct placeCan Harfbuzz be a problem? In the older emacs version (maybe 3 or 4 years ago?) I never had these problems.
Kind regards
Frankwith_emacs.png
Description: PNG imagewith_writer.png
Description: PNG image
--- End Message ---
--- Begin Message ---Subject: Re: bug#56695: A new and old font problem with Arabic Date: Mon, 25 Jul 2022 19:06:42 +0300 > Date: Mon, 25 Jul 2022 17:29:23 +0200 (CEST) > From: "fr_ml@t-online.de" <fr_ml@t-online.de> > Cc: "56695@debbugs.gnu.org" <56695@debbugs.gnu.org> > > > This is expected: Emacs caches the results of previous text-shaping. > > You should invoke > > > > M-: (clear-composition-cache) RET > > > > to force Emacs to forget the old text-shaping results. > If I have the positioning problem, this command doesn't solve it. It doesn't always work, indeed. > > > It works, Emacs uses the font correctly. > > > And it seems that the positioning is then much better. The old problem is > > > still there but not so often. > > > > Does this mean we can close this bug? > It's better but it's strange. And unfortunately some years ago this > problem wasn't there at all. I'm guessing "some years ago" you used different versions of the same fonts. A font that was OK in the past could regress later. For correct complex shaping, it is very important to find good fonts. I suggest to look for a good Arabic font that is fixed-pitch, and use it instead of DejaVu Sans. > But it's ok. We can close it. Many thanks. Done.
--- End Message ---
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