From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Robert Pluim Newsgroups: gmane.emacs.bugs Subject: bug#54914: 28.1.50; Unable to form Brahmi conjuncts in Emacs Date: Wed, 13 Apr 2022 18:56:21 +0200 Message-ID: <87tuaw53d6.fsf@gmail.com> References: <837d7t3r8n.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="981"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 54914@debbugs.gnu.org To: Sameer Singh Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Apr 13 18:58:00 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 1negJc-00005i-Eo for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 13 Apr 2022 18:58:00 +0200 Original-Received: from localhost ([::1]:43472 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1negJY-0007OF-VG for geb-bug-gnu-emacs@m.gmane-mx.org; 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Wed, 13 Apr 2022 09:56:22 -0700 (PDT) In-Reply-To: <837d7t3r8n.fsf@gnu.org> (Eli Zaretskii's message of "Wed, 13 Apr 2022 19:03:36 +0300") 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:229837 Archived-At: >>>>> On Wed, 13 Apr 2022 19:03:36 +0300, Eli Zaretskii said: >> From: Sameer Singh >> Date: Wed, 13 Apr 2022 16:25:41 +0530 >>=20 >> Brahmi just like any other Indic script also has the ability to form= conjuncts, but despite using "Segoe UI >> Historic" font which supports Brahmi Conjuncts, Emacs is not able to= display them. Eli> This is a missing feature: we don't have composition rules for the Eli> Brahmi script, and more generally don't have any support for that Eli> script. Patches to add that are welcome. A brute-force example of what Eli's talking about would be: (set-char-table-range composition-function-table '(#x11000 . #x1107F) (list (vector "[\x11000-\x1107F]+" 0 #'font-shape-gstring))) which essentially means "hand off any sequence of Brahmi codepoints to harfbuzz", which might end up being slow. From your example, you=CA=BCre requesting more something like "consonant, virami, consonant", which is also possible, but we'll need your guidance to tell us when the results are acceptable. (If anyone is interested, there=CA=BCs section 14.1 of the Unicode 14 standard that describes how they think Brahmi should be handled, but I=CA=BCve not tried to understand it yet). Robert --=20