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bug#16621: 24.3.50; Periodic timer + overlays = flickering near point
From: |
Eli Zaretskii |
Subject: |
bug#16621: 24.3.50; Periodic timer + overlays = flickering near point |
Date: |
Tue, 04 Feb 2014 05:48:53 +0200 |
> Date: Tue, 04 Feb 2014 04:34:58 +0200
> From: Dmitry Gutov <dgutov@yandex.ru>
> CC: 16621@debbugs.gnu.org, Stefan Monnier <monnier@IRO.UMontreal.CA>
>
> Isn't the fact that flickering is at all possible in this scenario, a
> problem?
Yes, but it is currently an unavoidable one, because this is how the
code was designed and implemented to work.
> Doesn't it mean that occasional flickers can still happen under
> normal conditions (timers with much longer intervals, for example),just
> that the probability of occurrence is smaller. If I understand you
> right, all it takes is for timer to fire at just the right moment before
> the screen updates.
Indeed, that's true.
> Some relatively low-hanging fruit has already been mentioned in the
> comments
Like what? If you mean the fact that we redraw the cursor when
perhaps that could be avoided, someone else will have to suggest a
better algorithm than doing it on every frame update. Nothing else
discussed here was easy, either.
> but would it be too much to expect some sort of double-buffering
> used for Emacs display, eventually?
You mean, outside Emacs? Yes, probably, but then this isn't an Emacs
issue, and I know absolutely nothing about it.
> Or is the related overhead considered too much of a cost?
If you mean double buffering inside Emacs, you will have to explain
why you think it will solve the problem.
- bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, (continued)
- bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Stefan Monnier, 2014/02/01
- bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Eli Zaretskii, 2014/02/02
- bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Stefan Monnier, 2014/02/02
- bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Eli Zaretskii, 2014/02/03
- bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Stefan Monnier, 2014/02/03
- bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Eli Zaretskii, 2014/02/03
- bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Stefan Monnier, 2014/02/03
- bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Eli Zaretskii, 2014/02/03
bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Dmitry Gutov, 2014/02/03
- bug#16621: 24.3.50; Periodic timer + overlays = flickering near point,
Eli Zaretskii <=
- bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Dmitry Gutov, 2014/02/04
- bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Eli Zaretskii, 2014/02/04
- bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Jan D., 2014/02/04
- bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Eli Zaretskii, 2014/02/04
- bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Jan Djärv, 2014/02/05
- bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Eli Zaretskii, 2014/02/05
bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Stefan Monnier, 2014/02/05
bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Eli Zaretskii, 2014/02/05
bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Stefan Monnier, 2014/02/05
bug#16621: 24.3.50; Periodic timer + overlays = flickering near point, Eli Zaretskii, 2014/02/05