From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Miles Bader Newsgroups: gmane.emacs.devel Subject: Re: A patch for enforcing double-width CJK character display Date: Tue, 17 Apr 2012 13:08:49 +0900 Message-ID: <87wr5fdmpa.fsf@catnip.gol.com> References: <4F85A138.6090900@i-soft.com.cn> <4F8698B0.2030703@i-soft.com.cn> <83hawp46p7.fsf@gnu.org> <4F86BA0F.4080301@i-soft.com.cn> <83ehrt3u0p.fsf@gnu.org> <4F87173F.3070801@i-soft.com.cn> <4F8782C8.2030005@i-soft.com.cn> <87d379h971.fsf@catnip.gol.com> <877gxghc3d.fsf@catnip.gol.com> <4F8B6D0F.2050700@i-soft.com.cn> <4F8BB0D3.6060202@i-soft.com.cn> <4F8BBE1F.9080701@i-soft.com.cn> <87sjg3kygc.fsf@catnip.gol.com> <873983kx7u.fsf@catnip.gol.com> <4F8CCEB2.4060001@i-soft.com.cn> <87ipgzjdir.fsf@catnip.gol.com> <4F8CDCE1.8030109@i-soft.com.cn> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Trace: dough.gmane.org 1334635745 11746 80.91.229.3 (17 Apr 2012 04:09:05 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Tue, 17 Apr 2012 04:09:05 +0000 (UTC) Cc: emacs-devel@gnu.org To: =?utf-8?B?6buE5bu65b+g?= Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Apr 17 06:09:04 2012 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1SJziy-0007ha-BY for ged-emacs-devel@m.gmane.org; Tue, 17 Apr 2012 06:09:04 +0200 Original-Received: from localhost ([::1]:46111 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SJzix-000708-KA for ged-emacs-devel@m.gmane.org; Tue, 17 Apr 2012 00:09:03 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:60671) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SJzis-0006zz-86 for emacs-devel@gnu.org; Tue, 17 Apr 2012 00:09:01 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SJzio-0007gx-0z for emacs-devel@gnu.org; Tue, 17 Apr 2012 00:08:57 -0400 Original-Received: from smtp12.dentaku.gol.com ([203.216.5.74]:39093) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SJzin-0007go-Ni; Tue, 17 Apr 2012 00:08:53 -0400 Original-Received: from 61.245.22.233.eo.eaccess.ne.jp ([61.245.22.233] helo=catnip.gol.com) by smtp12.dentaku.gol.com with esmtpa (Dentaku) (envelope-from ) id 1SJzik-000213-CR; Tue, 17 Apr 2012 13:08:50 +0900 Original-Received: by catnip.gol.com (Postfix, from userid 1000) id 8A211DFC1; Tue, 17 Apr 2012 13:08:49 +0900 (JST) System-Type: x86_64-unknown-linux-gnu In-Reply-To: <4F8CDCE1.8030109@i-soft.com.cn> (=?utf-8?B?Ium7hOW7uuW/oCIn?= =?utf-8?B?cw==?= message of "Tue, 17 Apr 2012 11:00:49 +0800") Original-Lines: 48 X-Virus-Scanned: ClamAV GOL (outbound) X-Abuse-Complaints: abuse@gol.com X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 203.216.5.74 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:149715 Archived-At: =E9=BB=84=E5=BB=BA=E5=BF=A0 writes: >>> So I'm wondering how you get the pixelsize of fonts? >> I used "xzoom" to magnify the display, and counted the pixels... :] > > Wow :-D > But a wrong way to get pixelsize:-( > > You have a very BIG BIG BIG misunderstanding of "glyph pixelsize". That's silly. It doesn't _matter_ what some definition says somewhere. In the end, what _actually matters_ is how the characters are displayed -- and the best way to judge how they are displayed is to _look at the display_. [The pixel counts I gave, BTW are actually "advance counts" -- the number of pixels between the left edge of one character and the left edge of the next character.] So the point is that the numbers I have should be accurate in terms of how the characters are actually displayed. To reiterate: 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. 2) So, if you force the CJK characters to fit 2 * ASCII width, then you obviously need to add (180 - 120) =3D 60 pixels of extra space to those 10 CJK characters. 3) That's 6 extra pixels of whitespace (in addition to existing whitespace) per CJK character. 4) Since each CJK character is 12-pixels wide, that increases the character advance spacing by 50%... Anyway, I'll try your patch, and see how it looks in reality. Thanks, -miles --=20 Zeal, n. A certain nervous disorder afflicting the young and inexperienced.