From mboxrd@z Thu Jan  1 00:00:00 1970
Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail
From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Ligatures
Date: Mon, 18 May 2020 20:41:09 +0300
Message-ID: <83v9kt87ka.fsf@gnu.org>
References: <20200517124125.000013a4@web.de>
 <97C7EAB7-10AB-4702-ABC8-EB6C1C50ABDB@gnu.org>
 <20200517165953.000044d2@web.de> <83lflqblp0.fsf@gnu.org>
 <CAOqdjBcWtscyux528vimJKivC32MHp100N3DiRJO7ce61OMjOg@mail.gmail.com>
 <83ftbybio3.fsf@gnu.org>
 <CAOqdjBdt=DXf5o3tb2qpfv=K7q5JzNFW_FZ6-Z40mFC=cp_zDw@mail.gmail.com>
 <83zha69xs2.fsf@gnu.org> <83367x9qeq.fsf@gnu.org>
 <jwvo8ql5ghj.fsf-monnier+emacs@gnu.org> <20200518172441.GD31606@tuxteam.de>
Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202";
	logging-data="80933"; mail-complaints-to="usenet@ciao.gmane.io"
Cc: emacs-devel@gnu.org
To: <tomas@tuxteam.de>
Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon May 18 19:42:45 2020
Return-path: <emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org>
Envelope-to: ged-emacs-devel@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 <emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org>)
	id 1jajml-000Kvv-Uv
	for ged-emacs-devel@m.gmane-mx.org; Mon, 18 May 2020 19:42:43 +0200
Original-Received: from localhost ([::1]:36344 helo=lists1p.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.90_1)
	(envelope-from <emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org>)
	id 1jajmk-00049p-W5
	for ged-emacs-devel@m.gmane-mx.org; Mon, 18 May 2020 13:42:43 -0400
Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:40158)
 by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
 (Exim 4.90_1) (envelope-from <eliz@gnu.org>) id 1jajlJ-00031d-8j
 for emacs-devel@gnu.org; Mon, 18 May 2020 13:41:13 -0400
Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:33850)
 by eggs.gnu.org with esmtp (Exim 4.90_1)
 (envelope-from <eliz@gnu.org>)
 id 1jajlI-00052K-LI; Mon, 18 May 2020 13:41:12 -0400
Original-Received: from [176.228.60.248] (port=4022 helo=home-c4e4a596f7)
 by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256)
 (Exim 4.82) (envelope-from <eliz@gnu.org>)
 id 1jajlI-0002A9-0i; Mon, 18 May 2020 13:41:12 -0400
In-Reply-To: <20200518172441.GD31606@tuxteam.de> (tomas@tuxteam.de)
X-BeenThere: emacs-devel@gnu.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: "Emacs development discussions." <emacs-devel.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-devel>,
 <mailto:emacs-devel-request@gnu.org?subject=unsubscribe>
List-Archive: <https://lists.gnu.org/archive/html/emacs-devel>
List-Post: <mailto:emacs-devel@gnu.org>
List-Help: <mailto:emacs-devel-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-devel>,
 <mailto:emacs-devel-request@gnu.org?subject=subscribe>
Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org
Original-Sender: "Emacs-devel"
 <emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org>
Xref: news.gmane.io gmane.emacs.devel:250794
Archived-At: <http://permalink.gmane.org/gmane.emacs.devel/250794>

> Date: Mon, 18 May 2020 19:24:41 +0200
> From: <tomas@tuxteam.de>
> 
> > If Harfbuzz could tell us more precisely how to divide the glyph into
> > subglyphs, we could do a better job, of course.
> 
> On a very superficial glance it seems they can [1]
> 
> Cheers
> [1] https://github.com/harfbuzz/harfbuzz/blob/master/docs/usermanual-clusters.xml

AFAIK, each "cluster" corresponds to a single font glyph, and we
already get this information from HarfBuzz, see hbfont.c.