From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.help Subject: Re: Display of decomposed characters Date: Fri, 25 Dec 2020 21:01:55 +0200 Message-ID: <83wnx5n1zw.fsf@gnu.org> References: <83v9csplwq.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="32031"; mail-complaints-to="usenet@ciao.gmane.io" To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Dec 25 20:02:44 2020 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kssMO-0008Em-4p for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 25 Dec 2020 20:02:44 +0100 Original-Received: from localhost ([::1]:33014 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kssMN-0005l9-6m for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 25 Dec 2020 14:02:43 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:57030) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kssLt-0005jb-Gc for help-gnu-emacs@gnu.org; Fri, 25 Dec 2020 14:02:13 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:45494) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kssLt-000457-8U for help-gnu-emacs@gnu.org; Fri, 25 Dec 2020 14:02:13 -0500 Original-Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:1559 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1kssLs-0001dz-HR for help-gnu-emacs@gnu.org; Fri, 25 Dec 2020 14:02:13 -0500 In-Reply-To: (message from Philipp Stephani on Fri, 25 Dec 2020 18:14:31 +0100) X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:126763 Archived-At: > From: Philipp Stephani > Date: Fri, 25 Dec 2020 18:14:31 +0100 > Cc: help-gnu-emacs > > > They are (or should be) displayed as a composed glyph if you are using > > a font that supports both a and COMBINING DIAERESIS. Emacs cannot > > compose characters that aren't supported by the same font (because > > composition processing stops at face boundaries, and each font defines > > internally a separate face). > > Interesting. Indeed the two glyphs come from different fonts. Is there > a way to force a single font for both of them? If the default font supports the diaeresis, that will happen automatically. If not, then simply don't choose the default font that doesn't support accents. > Or should the algorithm be changed to perform composition before > font selection? That's (a) hard, and (b) a bad idea in general, because different fonts generally have very different sizes of accents, and are generally incompatible in terms of pixel dimensions of characters vs accents.