From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Gregory Heytings via "Emacs development discussions." Newsgroups: gmane.emacs.devel Subject: Re: Suggest installing more fonts? Date: Sat, 17 Oct 2020 17:37:30 +0000 Message-ID: References: <87wnzqa1be.fsf@gnus.org> <83zh4lthv4.fsf@gnu.org> <83a6wlt5ie.fsf@gnu.org> <837drpt1tb.fsf@gnu.org> <83wnzostl0.fsf@gnu.org> Reply-To: Gregory Heytings Mime-Version: 1.0 Content-Type: text/plain; format=flowed; charset=US-ASCII Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="17396"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Alpine 2.22 (NEB 394 2020-01-19) Cc: larsi@gnus.org, monnier@iro.umontreal.ca, emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Oct 17 19:39:35 2020 Return-path: 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 ) id 1kTqB4-0004QN-PK for ged-emacs-devel@m.gmane-mx.org; Sat, 17 Oct 2020 19:39:34 +0200 Original-Received: from localhost ([::1]:58486 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kTqB0-0006m3-4S for ged-emacs-devel@m.gmane-mx.org; Sat, 17 Oct 2020 13:39:32 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:38250) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kTq9G-0005sn-5K for emacs-devel@gnu.org; Sat, 17 Oct 2020 13:37:42 -0400 Original-Received: from mx.sdf.org ([205.166.94.24]:60577) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kTq9D-0001fE-RX; Sat, 17 Oct 2020 13:37:41 -0400 Original-Received: from sdf.org (IDENT:ghe@faeroes.freeshell.org [205.166.94.9]) by mx.sdf.org (8.15.2/8.14.5) with ESMTPS id 09HHbXkG005856 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits) verified NO); Sat, 17 Oct 2020 17:37:33 GMT Original-Received: (from ghe@localhost) by sdf.org (8.15.2/8.12.8/Submit) id 09HHbvLD006705; Sat, 17 Oct 2020 17:37:57 GMT In-Reply-To: <83wnzostl0.fsf@gnu.org> Received-SPF: pass client-ip=205.166.94.24; envelope-from=ghe@sdf.org; helo=mx.sdf.org X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/17 12:09:16 X-ACL-Warn: Detected OS = ??? X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:257957 Archived-At: >> Apparently it's not clear, so I'll say one last time that the feature I >> propose does _not_ require to install Unifont system-wide. It is to >> include Unifont in Emacs (say in etc/unifont), and to offer it as an >> additional option for glyphless-char-display, along with hex-code, >> empty-box, thin-space, and zero-width. The bitmap data would be used >> to draw the glyph in produce_glyphless_glyph() . > > I don't understand this proposal. Are you saying Emacs can already use > a font that is not installed? If so, can you tell how to do that? > I don't (yet) know, but I'd be surprised if this could not be done. Emacs already creates glyphs dynamically for tofus, and already uses black-and-white bitmaps at least in fringes. > > The way Emacs uses fonts is by using various system libraries, such as > Fontconfig, to find fonts that match certain criteria (script, encoding, > character codepoint, size, slant, etc.). How do you propose to do that > if, for example, Fontconfig knows nothing about a font? > The proposal is not to change anything to the way Emacs uses fonts, but to change something to the way Emacs behaves when it does not find an appropriate font to display a character. In that case Emacs would display a "degraded" glyph (from Unifont), and would issue a warning that the user should install another font. >> FYI, that feature is not "already in Emacs", as you said: when Unifont >> is installed, it takes precedence over some (but not all, I'm not sure >> why) of the better-looking available fonts. One example: DejaVu Sans >> has hebrew characters, but with Unifont installed hebrew characters are >> displayed with Unifont. > > This actually means that Unifont is more "in Emacs" than I thought. ;-) > > Anyway, did you check the coverage of Hebrew by DejaVu Sans? does it > cover Hebrew? > Yes, DejaVu Sans covers Hebrew (100% coverage).