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From: Eli Zaretskii <eliz@gnu.org>
To: Po Lu <luangruo@yahoo.com>
Cc: 65803@debbugs.gnu.org, shingo.fg8@gmail.com
Subject: bug#65803: 29.1; Noto Sans Mono CJK JP has doubled-width on Windows
Date: Sun, 10 Sep 2023 10:53:12 +0300	[thread overview]
Message-ID: <83msxusbvb.fsf@gnu.org> (raw)
In-Reply-To: <8734zmbi1z.fsf@yahoo.com> (message from Po Lu on Sun, 10 Sep 2023 15:31:36 +0800)

> From: Po Lu <luangruo@yahoo.com>
> Cc: shingo.fg8@gmail.com,  65803@debbugs.gnu.org
> Date: Sun, 10 Sep 2023 15:31:36 +0800
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > See above: other backends only calculate the average width for
> > proportional fonts.  So what you say doesn't fit my reading of the
> > code.
> 
> Because if spacing is not FC_PROPORTIONAL or FC_DUAL, we know in advance
> that max_advance_width or max_advance are identical to the average of
> all ASCII glyphs.  Such special treatment is an optimization, nothing
> more.  max_advance_width is the advance width (in em space) of the
> widest glyph when the font is scalable, and max_advance is that in pixel
> space if not.

So you think it's okay to do the same in the w32 font backend,
i.e. take the average width from the font when the font is known to be
fixed-pitch?  If not, please elaborate, because that's what I
understand from what you wrote above.





  reply	other threads:[~2023-09-10  7:53 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-07 13:38 bug#65803: 29.1; Noto Sans Mono CJK JP has doubled-width on Windows Shingo Tanaka
2023-09-07 13:50 ` Eli Zaretskii
2023-09-07 14:24   ` Shingo Tanaka
2023-09-07 14:40     ` Eli Zaretskii
2023-09-07 14:57       ` Eli Zaretskii
2023-09-07 23:19         ` Shingo Tanaka
2023-09-08  6:25           ` Eli Zaretskii
2023-09-07 22:26             ` Shingo Tanaka
2023-09-08 12:18               ` Eli Zaretskii
2023-09-08 13:42                 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-08 14:49                   ` Werner LEMBERG
2023-09-09 12:51                     ` Eli Zaretskii
2023-09-09 13:42                       ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-09 14:45                         ` Eli Zaretskii
2023-09-09 12:17                   ` Eli Zaretskii
2023-09-09 13:38                     ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-09 14:39                       ` Eli Zaretskii
2023-09-09 14:57                       ` Eli Zaretskii
2023-09-10  1:00                         ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-10  5:22                           ` Eli Zaretskii
2023-09-10  5:36                             ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-10  5:42                               ` Eli Zaretskii
2023-09-10  5:55                                 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-10  6:48                                   ` Eli Zaretskii
2023-09-10  7:31                                     ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-10  7:53                                       ` Eli Zaretskii [this message]
2023-09-10  7:55                                         ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-10  8:01                                           ` Eli Zaretskii
2023-09-10  8:08                                             ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-10  8:19                                               ` Eli Zaretskii
2023-09-10  8:31                                                 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-10  8:50                                                   ` Eli Zaretskii
2023-09-10  9:30                                                     ` Eli Zaretskii
2023-09-10 11:29                                                       ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-10 11:44                                                         ` Eli Zaretskii
2023-09-10 12:09                                                           ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-10 12:43                                                             ` Eli Zaretskii
2023-09-10 12:39                                               ` Shingo Tanaka

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