From: "Jan D." <jan.h.d@swipnet.se>
To: Chong Yidong <cyd@stupidchicken.com>
Cc: lbsmtp@gmail.com, 1867@debbugs.gnu.org
Subject: bug#1867: Resizing window causes text flickering when using antialiased font on X
Date: Thu, 06 Oct 2011 08:05:24 +0200 [thread overview]
Message-ID: <4E8D4524.3090902@swipnet.se> (raw)
In-Reply-To: <8739f73xva.fsf@stupidchicken.com>
Chong Yidong skrev 2011-10-05 23:57:
> Eli Zaretskii<eliz@gnu.org> writes:
>
>> The way redisplay is written, _any_ change to dimensions of _any_
>> window sets a flag that will cause a thorough redisplay of all the
>> windows on all the visible frames. However, I'd expect that redisplay
>> of any window not affected by the resizing be limited to redrawing the
>> cursor.
>
> Resizing a window redraws all windows on the same frame, even those
> unaffected by the resizing.
But according to Eli, the redraw optimizations in Emacs display engine
should not actually redraw anything in unchanged windows.
According to the desciption window 3 is totally unchanged, but flickers
anyway.
But this was on 23.0.60. Many bugs has been fixed since.
>
> The right way to fix flickering in Emacs is to implement double
> buffering, which is not a trivial project.
If we are aiming for a general solution across all ports this is true.
A pure X solution might be easier if we use the double buffer extension.
Jan D.
next prev parent reply other threads:[~2011-10-06 6:05 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-12 10:10 bug#1867: Resizing window causes text flickering when using antialiased font on X Bo Lin
2011-10-05 1:13 ` Glenn Morris
2011-10-05 7:01 ` Jan D.
2011-10-05 10:41 ` Eli Zaretskii
2011-10-05 17:34 ` Jan Djärv
2011-10-05 20:29 ` Eli Zaretskii
2011-10-05 21:16 ` Jan Djärv
2011-10-06 14:17 ` Jason Rumney
2011-10-05 21:57 ` Chong Yidong
2011-10-06 5:33 ` Eli Zaretskii
2011-10-06 6:05 ` Jan D. [this message]
2011-10-06 15:06 ` Chong Yidong
2011-10-06 19:38 ` Bo Lin
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