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 14:44:39 +0300 [thread overview]
Message-ID: <83cyyqs15k.fsf@gnu.org> (raw)
In-Reply-To: <87h6o29sgm.fsf@yahoo.com> (message from Po Lu on Sun, 10 Sep 2023 19:29:45 +0800)
> From: Po Lu <luangruo@yahoo.com>
> Cc: 65803@debbugs.gnu.org, shingo.fg8@gmail.com
> Date: Sun, 10 Sep 2023 19:29:45 +0800
>
> Eli Zaretskii <eliz@gnu.org> writes:
>
> > Anyway, I tried to write the code to compute the font average width,
> > and found that it's impossible to do reliably on MS-Windows: all the
> > font-related functions that return glyph metrics require a "device
> > context" argument, which cannot be provided as long as we don't have
> > at least one w32 frame. So invocations like
> >
> > emacs -fn "Arial Unicode MS"
> >
> > will not work, and that means invoking Emacs with variable-pitch fonts
> > as the default will not be able to take advantage of this improvement,
> > which basically makes all this change useless.
>
> If I'm not mistaken, the font*_open functions take a single frame
> argument F, and the average width property doesn't need to be computed
> until then. Can't you obtain the DC from that frame?
That's what I tried. The problem is, first time we open the fonts
(which is when it's important to have the metrics of the default
face's font), we are called from x-create-frame for the initial frame,
and the frame's w32-specific attributes are not yet set. The
window-system for the frame is still "initial", and get_frame_dc
aborts.
next prev parent reply other threads:[~2023-09-10 11:44 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
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 [this message]
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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