From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Keith David Bershatsky Newsgroups: gmane.emacs.bugs Subject: bug#36633: Scrolling by pixels: visible stretch glyphs overwrite header-line. 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FORWARDED MESSAGE ;;;;;;;;;;;;;;;;;;;;;; Date: Sun, 14 Jul 2019 09:47:25 -0700 From: Keith David Bershatsky To: Alan Third Cc: 36633@debbugs.gnu.org Subject: Re: bug#36633: Scrolling by pixels: visible stretch glyphs overwrite header-line. Here are links to two (2) youtube videos showing the issue on Emacs 26.1 (built by https://emacsformacosx.com/ a few months ago) and also the master branch that I built using a commit from 07/10/2019 (40cd6278ba965f3a9fcdddc568eb9ee7c69cf899). I don't have a 26.2 build at the moment. The issue is less noticeable on the master branch, but can still be seen nevertheless. I have not studied the code as to what makes this feature work, but offhand would think that the header-line should not be overwritten by the row moving upwards (rather than updated after it has been overwritten). Emacs 26.1: https://youtu.be/Y8cZfURSwZc Emacs Master Branch: https://youtu.be/BO3r9_6OvYo ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; > Date: [07-14-2019 03:39:35] <14 Jul 2019 11:39:35 +0100> > From: Alan Third > > * * * > > Hi Keith, I can't replicate this behaviour. The worst I see is some > flickering of the header line, which is unfortunately to be expected > from the current implementation. > > When you do it is the header line being overwritten and not immediately updated? > -- > Alan Third