From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Po Lu via "Bug reports for GNU Emacs, the Swiss army knife of text editors" Newsgroups: gmane.emacs.bugs Subject: bug#65191: 29.1; -ms and -cr CL options don't work Date: Fri, 11 Aug 2023 15:36:17 +0800 Message-ID: <87350qqbda.fsf@yahoo.com> References: <83leejjs8i.fsf@gnu.org> <87350rtlap.fsf@yahoo.com> <87il9mqhj1.fsf@yahoo.com> <87edkaqese.fsf@yahoo.com> <83leeighy4.fsf@gnu.org> Reply-To: Po Lu Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="8759"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Cc: peter.mao@gmail.com, 65191@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Aug 11 09:37:14 2023 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 1qUMht-00023q-Cc for geb-bug-gnu-emacs@m.gmane-mx.org; 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Hermes SMTP Server) with ESMTPA ID 19630d05fb6462b7e43e9fda58192d5b; Fri, 11 Aug 2023 07:36:21 +0000 (UTC) In-Reply-To: <83leeighy4.fsf@gnu.org> (Eli Zaretskii's message of "Fri, 11 Aug 2023 10:24:19 +0300") X-Mailer: WebService/1.1.21695 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo 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-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:267196 Archived-At: Eli Zaretskii writes: > I don't think I understand this well enough to discuss this > intelligently, so please elaborate on what happens, and include > pointers to more of the code so I and others could complement the > descriptions with what's actually in the code, and maybe suggest > alternative ways of dealing with this. > > Not responding to Cairo setting changes sounds like a loss: what > features are currently based on that, and would be lost if we revert > this support? Also, can't you think about an alternative way of > handling dynamic settings that will let us eat the cake, but also have > it? The problem boils down to apply_xft_settings, within xsettings.c. Under Cairo, that function calls: FcConfigSubstitute (NULL, pat, FcMatchPattern); options = cairo_font_options_create (); ftcrfont_get_default_font_options (dpyinfo, options); <------ cairo_ft_font_options_substitute (options, pat); cairo_font_options_destroy (options); FcDefaultSubstitute (pat); to retrieve the settings currently in effect, and compare them against the updated settings within the XSettings event. If a divergence is located, a config-changed event is sent. Under Xft, the following code is ultimately run: XftDefaultSet (dpyinfo->display, pat); but Cairo provides no analog, so these settings are never saved back to Cairo (nor can I find any means by which to do so.)