From: Werner LEMBERG <wl@gnu.org>
To: miles@gnu.org
Cc: jianzhong.huang@i-soft.com.cn, emacs-devel@gnu.org
Subject: Re: A patch for enforcing double-width CJK character display
Date: Tue, 17 Apr 2012 06:56:18 +0200 (CEST) [thread overview]
Message-ID: <20120417.065618.393680168.wl@gnu.org> (raw)
In-Reply-To: <87wr5fdmpa.fsf@catnip.gol.com>
> 1) In case 1, a 20-character sequence of ASCII characters takes 180
> pixels to display, and a 10-character sequence of CJK characters
> takes 120 pixels to display.
Mhmm. The silent assumption of making a CJK and ASCII font fit is
that double-width characters are really double width in relation to
single-width characters. In your example, the width of two ASCII
characters is 18px, while one CJK character is 12px. Such two fonts
simply don't fit, and no clever algorithm will be able to make them
ever fit without scaling.[1] Your arguments are thus moot IMHO.
Werner
[1] Not counting a full analysis of all glyphs of a font to check
whether it is possible to compress the advance width horizontally
because the left and right side bearings are large enough to do
that without overlapping.
next prev parent reply other threads:[~2012-04-17 4:56 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4F85A138.6090900@i-soft.com.cn>
2012-04-11 15:48 ` A patch for enforcing double-width CJK character display Kan-Ru Chen
2012-04-11 16:16 ` 黄建忠
2012-04-12 8:56 ` 黄建忠
2012-04-12 9:53 ` Eli Zaretskii
2012-04-12 11:18 ` 黄建忠
2012-04-12 14:27 ` Eli Zaretskii
2012-04-12 17:56 ` 黄建忠
2012-04-12 20:33 ` Stefan Monnier
[not found] ` <4F8782C8.2030005@i-soft.com.cn>
2012-04-13 11:42 ` 黄建忠
2012-04-13 12:03 ` 黄建忠
2012-04-13 13:27 ` Stefan Monnier
2012-04-15 5:10 ` Miles Bader
2012-04-15 13:27 ` 黄建忠
2012-04-15 16:08 ` William Xu
2012-04-15 22:19 ` Miles Bader
2012-04-16 0:51 ` 黄建忠
2012-04-16 5:27 ` Miles Bader
2012-04-16 5:40 ` 黄建忠
2012-04-16 6:37 ` 黄建忠
2012-04-16 9:21 ` 黄建忠
2012-04-17 2:16 ` 黄建忠
2012-04-17 0:13 ` Miles Bader
2012-04-17 0:39 ` Miles Bader
2012-04-17 2:00 ` 黄建忠
2012-04-17 2:30 ` Miles Bader
2012-04-17 3:00 ` 黄建忠
2012-04-17 4:08 ` Miles Bader
2012-04-17 4:56 ` Werner LEMBERG [this message]
2012-04-17 5:02 ` 黄建忠
2012-04-17 6:33 ` Miles Bader
2012-04-17 7:03 ` Werner LEMBERG
2012-04-17 5:52 ` Miles Bader
2012-04-17 6:10 ` 黄建忠
2012-04-17 7:02 ` Miles Bader
2012-04-17 8:06 ` Werner LEMBERG
2012-04-17 8:25 ` Miles Bader
2012-04-17 9:06 ` Werner LEMBERG
2012-04-17 8:51 ` 黄建忠
2012-04-17 6:45 ` Werner LEMBERG
2012-04-17 9:07 ` James Cloos
2012-04-17 9:27 ` 黄建忠
2012-04-17 1:47 ` 黄建忠
2012-04-18 6:54 ` Kenichi Handa
2012-04-18 8:13 ` 黄建忠
2012-04-18 13:58 ` Miles Bader
2014-04-28 5:35 JunJie Nan
2014-04-29 5:39 ` Stefan Monnier
2014-04-29 6:36 ` Jan D.
2014-04-29 8:16 ` Thien-Thi Nguyen
2014-04-29 20:41 ` Liang Wang
-- strict thread matches above, loose matches on Subject: below --
2014-04-30 2:00 Hui Liu
2014-04-30 17:08 ` Liang Wang
2014-10-04 3:26 Feng Shu
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