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#65803: 29.1; Noto Sans Mono CJK JP has doubled-width on Windows Date: Sun, 10 Sep 2023 19:29:45 +0800 Message-ID: <87h6o29sgm.fsf@yahoo.com> References: <83wmx0x3hj.fsf@gnu.org> <87wmx0dbn6.fsf@yahoo.com> <834jk3v8ux.fsf@gnu.org> <87wmwzbh5z.fsf@yahoo.com> <83pm2rtmvz.fsf@gnu.org> <87o7iac05e.fsf@yahoo.com> <834jk2txe6.fsf@gnu.org> <87fs3mbnem.fsf@yahoo.com> <831qf6twid.fsf@gnu.org> <877coybmho.fsf@yahoo.com> <83y1heseud.fsf@gnu.org> <8734zmbi1z.fsf@yahoo.com> <83msxusbvb.fsf@gnu.org> <87tts2a2cz.fsf@yahoo.com> <83jzsysbh4.fsf@gnu.org> <87pm2qa1s7.fsf@yahoo.com> <83il8isan2.fsf@gnu.org> <87ledea0oy.fsf@yahoo.com> <83h6o2s97x.fsf@gnu.org> <83fs3ms7dx.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"; 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Hermes SMTP Server) with ESMTPA ID 2852ec65850a620339161a0c01287af3; Sun, 10 Sep 2023 11:29:55 +0000 (UTC) In-Reply-To: <83fs3ms7dx.fsf@gnu.org> (Eli Zaretskii's message of "Sun, 10 Sep 2023 12:30:02 +0300") X-Mailer: WebService/1.1.21763 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:269950 Archived-At: Eli Zaretskii writes: > Anyway, I tried to write the code to compute the font average width, > and found that it's impossible to do reliably on MS-Windows: all the > font-related functions that return glyph metrics require a "device > context" argument, which cannot be provided as long as we don't have > at least one w32 frame. So invocations like > > emacs -fn "Arial Unicode MS" > > will not work, and that means invoking Emacs with variable-pitch fonts > as the default will not be able to take advantage of this improvement, > which basically makes all this change useless. If I'm not mistaken, the font*_open functions take a single frame argument F, and the average width property doesn't need to be computed until then. Can't you obtain the DC from that frame? TIA.