From: Eli Zaretskii <eliz@gnu.org>
To: Andreas Schwab <schwab@linux-m68k.org>, Kenichi Handa <handa@gnu.org>
Cc: xfq.free@gmail.com, 15273@debbugs.gnu.org
Subject: bug#15273: 24.3.50; Combining character sequences are displayed weirdly
Date: Fri, 06 Sep 2013 10:32:54 +0300 [thread overview]
Message-ID: <83ppsmmml5.fsf@gnu.org> (raw)
In-Reply-To: <87vc2ee9io.fsf@igel.home>
> From: Andreas Schwab <schwab@linux-m68k.org>
> Cc: Jan Djärv <jan.h.d@swipnet.se>, xfq.free@gmail.com,
> 15273@debbugs.gnu.org
> Date: Fri, 06 Sep 2013 08:42:23 +0200
>
> Eli Zaretskii <eliz@gnu.org> writes:
>
> > Character composition in Emacs can happen in 1 of 2 ways:
> >
> > . The font driver tells Emacs to compose several characters into a
> > single grapheme cluster, by drawing all of them as a single unit,
> > and by drawing the 2nd, 3rd, etc. character glyphs at certain pixel
> > offsets relative to the base glyph.
> >
> > . Emacs itself has composition rules for 2 or more characters; in
> > this case, the same pixel offsets come from those rules.
>
> The first way can only work if both characters are coming from the same
> font.
Yes.
> Not sure if that is also true for the second way, but I'd guess yes.
I'm not sure, either. The second way happens when we generate the
glyph matrices -- do we select font before or after that? If after,
we probably look for a font that supports all of the characters in the
composition. Perhaps Handa-san could comment on this.
But, at least in my testing, I used a font that definitely supports
both characters, and the composition still didn't happen.
next prev parent reply other threads:[~2013-09-06 7:32 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-05 14:08 bug#15273: 24.3.50; Combining character sequences are displayed weirdly Xue Fuqiao
2013-09-05 14:33 ` Eli Zaretskii
2013-09-05 23:26 ` Xue Fuqiao
2013-09-05 16:48 ` Jan Djärv
2013-09-05 17:12 ` Eli Zaretskii
2013-09-05 17:24 ` Eli Zaretskii
2013-09-05 17:33 ` Jan Djärv
2013-09-05 17:56 ` Eli Zaretskii
2013-09-06 5:08 ` Jan Djärv
2013-09-06 6:29 ` Eli Zaretskii
2013-09-06 6:42 ` Andreas Schwab
2013-09-06 7:32 ` Eli Zaretskii [this message]
2013-09-06 14:37 ` Xue Fuqiao
2013-09-06 15:53 ` Eli Zaretskii
2013-09-06 22:17 ` Xue Fuqiao
2013-09-06 22:37 ` Xue Fuqiao
2013-09-07 7:27 ` Eli Zaretskii
2013-09-07 7:26 ` Eli Zaretskii
2013-09-07 7:36 ` Jan Djärv
2013-09-07 7:57 ` Eli Zaretskii
2013-09-07 8:02 ` Jan Djärv
2013-09-07 8:10 ` Eli Zaretskii
2013-09-07 8:27 ` Jan Djärv
2013-09-07 8:40 ` Eli Zaretskii
2013-09-07 8:54 ` Jan Djärv
2013-09-07 9:59 ` Eli Zaretskii
2013-09-07 13:44 ` Jan Djärv
2013-09-07 15:20 ` Eli Zaretskii
2013-09-08 8:26 ` Jan Djärv
2013-09-07 22:50 ` Xue Fuqiao
2013-09-07 8:47 ` Jan Djärv
2013-09-07 9:22 ` Eli Zaretskii
2013-09-09 0:52 ` YAMAMOTO Mitsuharu
2013-09-09 5:17 ` Jan Djärv
2013-09-07 12:25 ` Wolfgang Jenkner
2013-09-07 15:18 ` Eli Zaretskii
2013-09-07 21:38 ` Wolfgang Jenkner
2013-09-07 22:29 ` Xue Fuqiao
2013-09-07 22:48 ` Xue Fuqiao
2013-09-08 11:03 ` Eli Zaretskii
2013-09-08 13:05 ` Kenichi Handa
2013-09-08 14:59 ` Eli Zaretskii
2013-09-10 13:58 ` Kenichi Handa
2013-09-10 15:37 ` Eli Zaretskii
2013-09-12 14:52 ` Kenichi Handa
2013-09-12 16:08 ` Eli Zaretskii
2020-11-18 15:13 ` Stefan Kangas
2020-11-18 17:09 ` Eli Zaretskii
2013-09-14 8:51 ` Jan Djärv
2013-09-14 9:12 ` Jan Djärv
2013-09-05 17:29 ` Jan Djärv
2013-09-05 17:56 ` Eli Zaretskii
2013-09-05 23:27 ` Xue Fuqiao
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