From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.devel Subject: Re: Ligature support Date: Sat, 06 Nov 2021 19:08:30 +0100 Message-ID: <877ddlcg2p.fsf@gnus.org> References: <87cznths5j.fsf@gnus.org> <87lf2c3k0z.fsf@gnus.org> <83wnlwqocq.fsf@gnu.org> <87wnlwyox9.fsf@gnus.org> <83lf2cq7n5.fsf@gnu.org> <87wnlnkxbo.fsf@gnus.org> <83cznfdohr.fsf@gnu.org> <87zgqik9bk.fsf@gnus.org> <83v916d64z.fsf@gnu.org> <878ry2k6qz.fsf@gnus.org> <83tugqd488.fsf@gnu.org> <87zgqiiq8c.fsf@gnus.org> <83r1bud3or.fsf@gnu.org> <87r1buipf5.fsf@gnus.org> <83o86yd0ig.fsf@gnu.org> <87a6iiimay.fsf@gnus.org> <83fssact8i.fsf@gnu.org> <87k0hmgre3.fsf@gnus.org> <87fssagqub.fsf@gnus.org> <87bl2ygq8u.fsf@gnus.org> <83sfw9bs66.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="8306"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Nov 06 19:10:08 2021 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 1mjQ8l-0001wp-Hj for ged-emacs-devel@m.gmane-mx.org; Sat, 06 Nov 2021 19:10:07 +0100 Original-Received: from localhost ([::1]:47540 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mjQ8k-0003cu-Bb for ged-emacs-devel@m.gmane-mx.org; Sat, 06 Nov 2021 14:10:06 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:45766) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mjQ7K-0002QA-6a for emacs-devel@gnu.org; Sat, 06 Nov 2021 14:08:38 -0400 Original-Received: from quimby.gnus.org ([2a01:4f9:2b:f0f::2]:43256) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mjQ7I-00063z-Bx; Sat, 06 Nov 2021 14:08:37 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=0gIATcDHD4YUaTlW0z50DI2d+UdXg614HYX6uu055jw=; b=PefWGD8F2BNMLiAtrviIDdoLVU uqYlsFy6/410yKexInRxgengzcEPqHiUDnCShoHHvf6TgvAJnsxAW1UqqOc0zNGsEyveuflZW1DyQ 45JtsPgJEpbBNUuNBtdWA2ct6cIHRKFbpPrQ/G7FSjrQR3bAfsfSRDYiI4pN1lIqIzE0=; Original-Received: from [84.212.220.105] (helo=elva) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mjQ7D-0000Kb-9E; Sat, 06 Nov 2021 19:08:34 +0100 Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwBAMAAAClLOS0AAAABGdBTUEAALGPC/xhBQAAACBj SFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAAJ1BMVEWmmXry26zjx532 47T88cHZoIW8R0ewIi/HYlu1poTWi3fks5P////UfGsyAAAAAWJLR0QMgbNRYwAAAAd0SU1FB+UL BhEgHESH//YAAAGHSURBVDjLpZTPasJAEMaVPsFk8AES8dTTZOilPfYJSimIuav4AKb0VsG49CY+ gYcWaU9WKNJ9ue6fbLJJ1lPnEML88s03M9mk108gShIAQLZB+gLc64MNl3dRgTapgSkQAEgIQCGF pwwDuASwA0g/jQFgIdYeSF594BYoKTe6wtqYfIUCVGahAZhsS9weEL12/TnMkgIruQJOY/Y6Rqbk XgO8meVrbxYebPJXBXbpZzbOn0+O0DhfyMlJKa6V22C2PJX5j3ylHKQulcbAd5sXC36We051Z70d RVLGmAo7ZHEk+U0GpPIwXWSVO52nawlGcSiKYrp3Tf3OxVw8aICRvD2IJ6f4ehOP76YU8iATq6jM R8OzGA315FtFR5MsdqWkzI5mJVu1bq42qDV2W1rRXKLbrvLg0PkxgP8HGh4YVpRpbAH11SHXx4Eq AERwwRzIKKpBHSBCNGdQ3ZEPquPhXhaBclUenTCV1XZr10qrND5odGZAEkcBkJiIL4HE/IH0++uC xgP8B+ZkrxYVE0zmAAAAJXRFWHRkYXRlOmNyZWF0ZQAyMDIxLTExLTA2VDE3OjMyOjI4KzAwOjAw 9gHIwAAAACV0RVh0ZGF0ZTptb2RpZnkAMjAyMS0xMS0wNlQxNzozMjoyOCswMDowMIdccHwAAAAA SUVORK5CYII= X-Now-Playing: Xiu Xiu's _Oh No_: "Knock Out" In-Reply-To: <83sfw9bs66.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 06 Nov 2021 10:32:33 +0200") Received-SPF: pass client-ip=2a01:4f9:2b:f0f::2; envelope-from=larsi@gnus.org; helo=quimby.gnus.org X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=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: 2.1.29 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:278888 Archived-At: Eli Zaretskii writes: > 30% slowdown is already a bad sign. Oh yeah, it means that we can't just do that. If we want to send everything through hb_shape, we'd have to change our display to optimise for that case. (Which I'm guessing would be a lot of work.) Today it's doing a lot of work to pick and choose those bits. > Are we willing to make our redisplay 3 times slower with plain ASCII > text? Nope. > I think the current design of character compositions in Emacs is > inappropriate for sending all the text via the shaping engine. It was > designed on the assumption that composed characters will be rare in > "normal" usage, and will only be massive in some specific scripts > where this is unavoidable, like Arabic and Hangul. If we want to call > the shaper for everything we display, we should radically change how > this is designed and implemented. Yes, indeed. -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no