From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Tick Reduction Date: Sat, 20 Nov 2021 09:06:45 -0500 Message-ID: References: <87bl2hyzca.fsf@gnus.org> <835ysoursn.fsf@gnu.org> <831r3cugcp.fsf@gnu.org> <83y25judps.fsf@gnu.org> <83tug7tjww.fsf@gnu.org> <83tug7rm0c.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="7626"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: larsi@gnus.org, emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Nov 20 15:07:42 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 1moR1q-0001qV-AQ for ged-emacs-devel@m.gmane-mx.org; Sat, 20 Nov 2021 15:07:42 +0100 Original-Received: from localhost ([::1]:51542 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1moR1o-0002AH-Bh for ged-emacs-devel@m.gmane-mx.org; Sat, 20 Nov 2021 09:07:40 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:52194) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1moR13-0001Rc-7Q for emacs-devel@gnu.org; Sat, 20 Nov 2021 09:06:53 -0500 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:43308) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1moR11-0000AN-2d; Sat, 20 Nov 2021 09:06:52 -0500 Original-Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 4DBFA1001C4; Sat, 20 Nov 2021 09:06:49 -0500 (EST) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id AE161100086; Sat, 20 Nov 2021 09:06:47 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1637417207; bh=5ciVB90Up8oY1FbEb7oWIIQFUq5jtBzsiKtp+NBCv/w=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=XhRwnusb2SYIpyZMlKMu1/YnZzO9Kd6OBLSCWVh1MD1O5QFnEqooSGV/GebZ7oFEg J9fQlKEKCB6hyr7RLYQYe44fGsUZ7slO9GWIkvxXaTi/M+o6XMuPvGv2NK/Z+Ibxqk cLDcCUANl9uACRJN+3PdHPo3e77tLpUSgzujeqQlvt7J+3p1Fxku1+tA/+02ekFEFz CPBgjeRy1BA2eDxx2tVYQ4W1ZoVdLvYVcthIQKIeT7V/hZzR1rpKxbyjYquehAoslA TUvmpzUU8hbeF9vj88+2Wydnymin4QctlEjAAtJF3sDQveabRuxDt+wFCtcbVw+f5L i1CjnKezE5Mtw== Original-Received: from pastel (unknown [216.154.30.173]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 7DA911201BD; Sat, 20 Nov 2021 09:06:47 -0500 (EST) In-Reply-To: <83tug7rm0c.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 20 Nov 2021 15:32:04 +0200") Received-SPF: pass client-ip=132.204.25.50; envelope-from=monnier@iro.umontreal.ca; helo=mailscanner.iro.umontreal.ca X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-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:279807 Archived-At: Eli Zaretskii [2021-11-20 15:32:04] wrote: >> From: Stefan Monnier >> Cc: larsi@gnus.org, emacs-devel@gnu.org >> Date: Sat, 20 Nov 2021 08:11:06 -0500 >> >> Yes, we may have to declare that for functions that "emulate" the >> >> redisplay internally, the resulting horizontal position info might not >> >> always be quite right (might not reflect what you'll see on the glass) >> >> for text tat uses the new alignment functionality :-( >> > That will break quite a few features, I'm afraid. >> This will completely depend on the specifics of when/how the answer >> isn't quite right, of course. > AFAIU, it will never be right, as long as this kind of alignment is > used on display. That completely depends on what the "redisplay emulation" code does. It could opt to use the old (unreliable) glyph matrix to compute its (documented as unreliable =F0=9F=99=8D) info, in which case it could end up breaking less often (but more spectacularly when it does)? Stefan