GNU bug report logs - #4129
Support for dual spacing fonts

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Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Takanori MATSUURA <t.matsuu <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Support for dual spacing fonts
Date: Wed, 12 Aug 2009 10:55:30 +0900

When I use IPAGothic font with emacs-23.1, ASCII characters are shown
as character itself and extra space (ie. "A ", "t ").  The font have
the spacing value of "90" which means dual spacing. If I explicitly
define the spacing to "0", this font-width issue is solved.

Other software which use fontconfig can treat IPAGothic fonts
properly.  So I'm afraid that emacs doesn't handle it.


Fonts are shown with wrong spacing:
Add ~/.emacs to
(set-frame-font "IPAGothic")

Fonts are shown properly:
Add ~/.emacs to
(set-frame-font "IPAGothic:spacing=0")

And add the following fontconfig configuration
<match target="font">
  <test name="family">
     <string>IPAGothic</string>
  </test>
  <edit name="spacing">
     <int>0</int>
  </edit>
  <edit name="globaladvance">
     <bool>false</bool>
  </edit>
</match>


IPAGothic font is available from:
http://ossipedia.ipa.go.jp/ipafont/
(Both Japanese and English contents included in one page. same meaning)


Regards,
Takanori

Message #8 received at 4129 <at> debbugs.gnu.org (full text, mbox):

From: Takanori MATSUURA <t.matsuu <at> gmail.com>
To: 4129 <at> debbugs.gnu.org
Subject: Re: bug#4129: Support for dual spacing fonts
Date: Wed, 21 Apr 2010 10:28:13 +0900

[Message part 1 (text/plain, inline)]

Please find the file attached.

The patch fixes bug#4129.


Takanori

[emacs-23.1-spacing.patch (text/x-patch, attachment)]

Message #11 received at 4129 <at> debbugs.gnu.org (full text, mbox):

From: Naohiro Aota <naota <at> elisp.net>
To: 4129 <at> debbugs.gnu.org
Subject: Emacs still have font spacing problem
Date: Sat, 26 Jun 2010 02:10:33 +0900 (JST)

Hi, list

As I post last year [1], Emacs still doesn't deal with fonts whose
spacing is set to FC_DUAL. Please see this screen-shot I've sent last
year [2]. You see disgusting Elisp indentation, don't you?

This is all because Emacs assume "space width" is as same as "font max
width" only just if the font is not "PROPORTIONAL". Some Japanese are
using "DUAL" fonts (M+ font, IPA font and so on). These fonts have
"glyphs in precisely two widths, one twice as wide as the other" [3],
Emacs shouldn't use "max width" for "min width" and "space width" when
there is two kinds of width!

Please please think applying the patch.

Regards,

[1] http://article.gmane.org/gmane.emacs.devel/111557/
[2] http://article.gmane.org/gmane.emacs.devel/111572/
[3] http://fontconfig.org/fontconfig-devel/fcfreetypecharsetandspacing.html

Message #14 received at 4129 <at> debbugs.gnu.org (full text, mbox):

From: Kenichi Handa <handa <at> m17n.org>
To: Naohiro Aota <naota <at> elisp.net>
Cc: 4129 <at> debbugs.gnu.org
Subject: Re: bug#4129: Emacs still have font spacing problem
Date: Wed, 30 Jun 2010 15:57:24 +0900

In article <20100626.021033.1233076457334905269.naota <at> elisp.net>, Naohiro Aota <naota <at> elisp.net> writes:

> As I post last year [1], Emacs still doesn't deal with fonts whose
> spacing is set to FC_DUAL. Please see this screen-shot I've sent last
> year [2]. You see disgusting Elisp indentation, don't you?

> This is all because Emacs assume "space width" is as same as "font max
> width" only just if the font is not "PROPORTIONAL". Some Japanese are
> using "DUAL" fonts (M+ font, IPA font and so on). These fonts have
> "glyphs in precisely two widths, one twice as wide as the other" [3],
> Emacs shouldn't use "max width" for "min width" and "space width" when
> there is two kinds of width!

> Please please think applying the patch.

Thank you for the patch, and I'm very sorry for the late
response on this matter.  It seems that I somehow missed
your first report.

I've just applied your patch in this mail:

> [1] http://article.gmane.org/gmane.emacs.devel/111557/

---
Kenichi Handa
handa <at> m17n.org

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