From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Vincent Lefevre Newsgroups: gmane.emacs.bugs Subject: bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning Date: Sat, 7 Nov 2020 11:35:35 +0100 Message-ID: <20201107103535.GF27593@zira.vinc17.org> References: <20201031011350.GJ27593@zira.vinc17.org> <83r1pe975u.fsf@gnu.org> <20201031224324.GK27593@zira.vinc17.org> <20201101002430.GL27593@zira.vinc17.org> <83ft5tf3zr.fsf@gnu.org> <20201101173240.GO27593@zira.vinc17.org> <83a6w1ezwv.fsf@gnu.org> <20201101183458.GP27593@zira.vinc17.org> <834km8gbiv.fsf@gnu.org> <83r1p57eoy.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="33039"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/1.14.5+76 (bb407ec3) vl-127292 (2020-06-24) Cc: 44284@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sat Nov 07 11:36:19 2020 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 1kbLZz-0008UT-Fy for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 07 Nov 2020 11:36:19 +0100 Original-Received: from localhost ([::1]:49726 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kbLZy-0006Eu-IL for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 07 Nov 2020 05:36:18 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:34024) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kbLZj-0006Eg-7z for bug-gnu-emacs@gnu.org; Sat, 07 Nov 2020 05:36:03 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:46452) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kbLZi-0006jC-Ia for bug-gnu-emacs@gnu.org; Sat, 07 Nov 2020 05:36:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1kbLZi-0007nj-Gl for bug-gnu-emacs@gnu.org; Sat, 07 Nov 2020 05:36:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Vincent Lefevre Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 07 Nov 2020 10:36:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 44284 X-GNU-PR-Package: emacs Original-Received: via spool by 44284-submit@debbugs.gnu.org id=B44284.160474533929955 (code B ref 44284); Sat, 07 Nov 2020 10:36:02 +0000 Original-Received: (at 44284) by debbugs.gnu.org; 7 Nov 2020 10:35:39 +0000 Original-Received: from localhost ([127.0.0.1]:57997 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kbLZL-0007n4-Ga for submit@debbugs.gnu.org; Sat, 07 Nov 2020 05:35:39 -0500 Original-Received: from joooj.vinc17.net ([155.133.131.76]:60644) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kbLZJ-0007mw-Li for 44284@debbugs.gnu.org; Sat, 07 Nov 2020 05:35:38 -0500 Original-Received: from smtp-zira.vinc17.net (128.119.75.86.rev.sfr.net [86.75.119.128]) by joooj.vinc17.net (Postfix) with ESMTPSA id 2D17925E; Sat, 7 Nov 2020 11:35:36 +0100 (CET) Original-Received: by zira.vinc17.org (Postfix, from userid 1000) id D087AC27BCE; Sat, 7 Nov 2020 11:35:35 +0100 (CET) Content-Disposition: inline In-Reply-To: <83r1p57eoy.fsf@gnu.org> X-Mailer-Info: https://www.vinc17.net/mutt/ 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" Xref: news.gmane.io gmane.emacs.bugs:192827 Archived-At: On 2020-11-07 10:29:17 +0200, Eli Zaretskii wrote: > > Date: Sun, 01 Nov 2020 20:47:04 +0200 > > From: Eli Zaretskii > > Cc: 44284@debbugs.gnu.org > > > > > Alternatively, Emacs could use some heuristic: if extents.y_bearing > > > is very close to an integer, assume that it should be this integer. > > > This is rather ugly as this might yield unexpected results in some > > > applications, but would this be OK in Emacs? > > > > It would be okay, I think: we have a few kludgey workarounds for > > similar issues in other libraries. > > > > I thought about something like using ceil (VALUE - 1/128) or maybe > > even 1/256, on the assumption that the original integer value cannot > > be of a greater granularity (the non-Cairo code uses 1/64). > > No further comments, so I pushed such a fix to the master branch, and > I'm closing this bug report. Many thanks for your help in debugging > this problem. I've just tested, and I confirm that this completely fixes the bug. Thanks. -- Vincent Lefèvre - Web: 100% accessible validated (X)HTML - Blog: Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)