From: Eli Zaretskii <eliz@gnu.org>
To: Yuan MEI <yuan.mei.list@gmail.com>
Cc: emacs-devel@gnu.org
Subject: Re: Redisplay issue
Date: Sun, 29 Nov 2015 17:42:44 +0200 [thread overview]
Message-ID: <83two4olqj.fsf@gnu.org> (raw)
In-Reply-To: <CANGGyWY_dt7+U-7R1Uab6302d8YFnNDTTLsD7TiRtQTjpyn+iA@mail.gmail.com>
> Date: Sat, 28 Nov 2015 18:54:01 -0800
> From: Yuan MEI <yuan.mei.list@gmail.com>
> Cc: emacs-devel <emacs-devel@gnu.org>
>
> > Can you see if the coordinates of the exposed region, as reported to
> > Emacs, correspond to what is in fact exposed?
>
> Finally I captured a state that although an expose event was sent to
> Emacs (correctly), Emacs did not redraw. In the attached screenshot,
> the left-side two windows are Emacs and speedbar frames. The
> top-right terminal shows the output of xev monitoring the events of
> the main Emacs window. This state was captured while shifting out of
> the virtual desktop containing Emacs then shifting in. Emacs did a
> partial redraw only.
I don't understand how Emacs could redraw only partially, if it
received the correct coordinates of the exposed region. I might be
able to understand how nothing could be redrawn, but partially?..
There's something I'm missing here.
Can you build your own Emacs? The display engine can produce a trace
of what it does, but it isn't compiled by default. If you can build
Emacs, then please configure with --enable-checking='yes,glyphs', then
type "M-x trace-redisplay RET" inside Emacs, and post here everything
it outputs to stderr starting with "expose_frame" when you succeed to
reproduce this again.
If you cannot build Emacs, then perhaps you could step with a debugger
inside expose_frame and its subroutines, and tell what's going one
there.
Thanks.
next prev parent reply other threads:[~2015-11-29 15:42 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-27 22:31 Redisplay issue Yuan MEI
2015-11-28 8:06 ` Eli Zaretskii
2015-11-28 8:27 ` Yuan MEI
2015-11-28 9:44 ` Eli Zaretskii
2015-11-28 20:19 ` Yuan MEI
2015-11-28 20:49 ` Eli Zaretskii
2015-11-29 2:54 ` Yuan MEI
2015-11-29 15:42 ` Eli Zaretskii [this message]
2015-11-29 23:35 ` Yuan MEI
2015-11-30 16:16 ` Eli Zaretskii
2015-12-01 4:51 ` Yuan MEI
2015-12-01 16:01 ` Eli Zaretskii
2015-12-02 4:35 ` Yuan MEI
2015-12-02 13:57 ` Eli Zaretskii
2015-12-03 4:55 ` Yuan MEI
2015-12-03 7:47 ` Eli Zaretskii
2015-12-03 8:09 ` Yuan MEI
2015-12-03 10:23 ` Eli Zaretskii
2015-12-03 18:16 ` martin rudalics
2015-12-03 21:23 ` Yuan MEI
2015-12-04 8:08 ` martin rudalics
2015-12-04 8:30 ` Yuan MEI
2015-12-04 8:48 ` martin rudalics
2015-12-04 8:54 ` Yuan MEI
2015-12-04 8:56 ` martin rudalics
2015-12-04 9:00 ` Yuan MEI
2015-12-04 9:05 ` martin rudalics
2015-12-04 9:47 ` Eli Zaretskii
2015-12-04 10:21 ` martin rudalics
2015-12-04 11:01 ` Eli Zaretskii
2015-12-04 11:12 ` Eli Zaretskii
2015-12-05 0:25 ` YAMAMOTO Mitsuharu
2015-12-05 9:17 ` Eli Zaretskii
2015-12-06 0:49 ` Yuan MEI
2015-12-07 3:33 ` YAMAMOTO Mitsuharu
2015-12-07 17:19 ` Eli Zaretskii
2015-12-08 4:03 ` YAMAMOTO Mitsuharu
2015-12-11 8:48 ` Eli Zaretskii
2015-11-28 21:44 ` joakim
2015-11-29 0:14 ` Yuan MEI
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