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.bugs Subject: bug#20140: 24.4; M17n shaper output rejected Date: Wed, 16 Feb 2022 21:20:02 +0200 Message-ID: <83sfsi1uvx.fsf@gnu.org> References: <20150318222040.4066e6e9@JRWUBU2> <87r18jk5nr.fsf@gnus.org> <83v8xv2icg.fsf@gnu.org> <20220205225251.08a0faab@JRWUBU2> <83sfsmpmxb.fsf@gnu.org> <20220213211152.03e2990a@JRWUBU2> <83leydpok0.fsf@gnu.org> <20220214232623.30534d5a@JRWUBU2> <83wnhw2nxy.fsf@gnu.org> <20220215210605.1c41c1b2@JRWUBU2> <83a6er2br1.fsf@gnu.org> <20220216190112.3ee79598@JRWUBU2> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="29089"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 20140@debbugs.gnu.org, larsi@gnus.org To: Richard Wordingham Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Feb 16 20:21:11 2022 Return-path: Envelope-to: geb-bug-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 1nKPrT-0007Pn-Bf for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 16 Feb 2022 20:21:11 +0100 Original-Received: from localhost ([::1]:50290 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nKPrS-0000PY-0T for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 16 Feb 2022 14:21:10 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:51172) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nKPrK-0000P0-1p for bug-gnu-emacs@gnu.org; Wed, 16 Feb 2022 14:21:02 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:55597) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1nKPrJ-0001QK-OF for bug-gnu-emacs@gnu.org; Wed, 16 Feb 2022 14:21:01 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1nKPrJ-00070G-LG for bug-gnu-emacs@gnu.org; Wed, 16 Feb 2022 14:21:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 16 Feb 2022 19:21:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 20140 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: moreinfo Original-Received: via spool by 20140-submit@debbugs.gnu.org id=B20140.164503920826842 (code B ref 20140); Wed, 16 Feb 2022 19:21:01 +0000 Original-Received: (at 20140) by debbugs.gnu.org; 16 Feb 2022 19:20:08 +0000 Original-Received: from localhost ([127.0.0.1]:49494 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nKPqR-0006ys-HH for submit@debbugs.gnu.org; Wed, 16 Feb 2022 14:20:07 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:43748) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nKPqP-0006yH-5L for 20140@debbugs.gnu.org; Wed, 16 Feb 2022 14:20:06 -0500 Original-Received: from [2001:470:142:3::e] (port=59814 helo=fencepost.gnu.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nKPqH-0000x4-Ne; Wed, 16 Feb 2022 14:19:58 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=SK5qU09+esoZR+oYcWHjv//xTXzMoLUnCBHs6z2zTRU=; b=o6cVGiCPgq4s tHxqqXISMs/FFobCPsfw6IRNjuBBPHbouZ5iQfZP0vn0NMlbklQT7UnnnzC+Gcv20P/6caSMD5Kmf W8ps1eKUeNjMk/unyWPsDQ0sSEAlu4TqxOSGJ22TnzynxdpqeW7QFH/s8myfvkKpGNd9scMwSAckj bxgpx4uPZ6Uuq8UJ8AI3K/bxKCVEmDsOrQKRGEK6+CRkIqBkd8Qf38UeM9nYbdyb9hEYLONb7aGPL QWXYDHg67opW3KYBWPNK1Ea7xq1ItCYWRkF/WUKZgfCRng7msTiG0hEdhC7WQrNXDIb0OvjoimYUP kRoPd8gxhF3875ev9yjdGQ==; Original-Received: from [87.69.77.57] (port=1739 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nKPqG-0007fx-Oh; Wed, 16 Feb 2022 14:19:57 -0500 In-Reply-To: <20220216190112.3ee79598@JRWUBU2> (message from Richard Wordingham on Wed, 16 Feb 2022 19:01:12 +0000) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:227054 Archived-At: > Date: Wed, 16 Feb 2022 19:01:12 +0000 > From: Richard Wordingham > Cc: larsi@gnus.org, 20140@debbugs.gnu.org > > > It sounds like Courier New in Windows 10 was "improved" by removing > > the capability of ligating those 2 characters. On Windows XP, their > > standard Courier New shows the first 2 characters ligate into a single > > glyph, which looks just like U+FCCA, but on Windows 10 they don't > > ligate. I don't know why is that; perhaps Arabic typesetting experts > > decided these should not ligate? > > > > > I must admit I'm having trouble laying my hand on a font which > > > does these ligatures. > > > > Try the Arabic Typesetting font, there I see on Windows 10 that the > > first 2 characters look like U+FCCA. > > > > IOW, this is a font issue, not an Emacs or HarfBuzz issue. > > Arabic Typesetting seems not to come in an evaluation copy of Windows > 10. You can easily install it from the Internet. I did. > And yes, the issue is that some fonts probably don't work well with > Emacs. ??? These issues with fonts have nothing to do with Emacs. HarfBuzz will produce the same results outside of Emacs; e.g., try hb-view. Or view your message with those characters in a Web browser (by pointing it to the bug-gnu-emacs archives) -- you will see the same results. AFAIU, the fonts simply don't want to produce a ligature from those two characters. Arabic Typesetting does, so the result is what you expect, in Emacs and elsewhere.