Re: VBL sync
Re: VBL sync
- Subject: Re: VBL sync
- From: "Corey O'Connor" <email@hidden>
- Date: Thu, 6 Apr 2006 11:00:06 -0700
Are you on Tiger?
In this context, "flush" is the process of writing the window's
back-buffers to the screen.
-Corey
On 4/6/06, Valerio Ferrucci <email@hidden> wrote:
> What do you mean by "flush"?
> I don't flush anything. I simply draw rects (and other stuffs) in my
> "drawRect" routine.
>
> I see flickering when I scroll some elements in my view and I was
> sure it was dued to VBL async draw.
>
>
>
>
> Il giorno 05/apr/06, alle ore 23:20, Ricky Sharp ha scritto:
>
> >
> > On Apr 5, 2006, at 7:51 AM, Valerio Ferrucci wrote:
> >
> >> Hi,
> >> does anyone can give me some hints about syncing my drawing with
> >> the vertical retrace of the screen?
> >>
> >> Note:
> >> I'm not using OpenGL (no directly) but simple cocoa drawing
> >> (NSBezierPath etc...)
> >
> > Do you need to run on systems before 10.4 (Tiger)? On Tiger,
> > drawing is already synced up. Here's a quote from a while back on
> > quartz-dev:
> >
> > "one important change that will affect performance (and more likely
> > benchmarks) is flushing. For the past few years we've been telling
> > developers not to flush faster than the display refresh rate as
> > that is just wasteful, and in Tiger we will be enforcing this by
> > making every flush operation vbl syned. This is important to reduce
> > or eliminate visual tearing in the system and continue going
> > forward with glitch free playback in the system."
> >
> > I know for my app which does tons of custom drawing, no tearing
> > exists when running on Tiger.
> >
> >
> > If you need further assistance, quartz-dev would be a better place
> > to ask.
> >
> > ___________________________________________________________
> > Ricky A. Sharp mailto:email@hidden
> > Instant Interactive(tm) http://www.instantinteractive.com
> >
>
> ==================================================================
> Valerio Ferrucci Tabasoft Sas
> email@hidden http://www.tabasoft.it
>
>
> _______________________________________________
> Do not post admin requests to the list. They will be ignored.
> Cocoa-dev mailing list (email@hidden)
> Help/Unsubscribe/Update your Subscription:
>
> This email sent to email@hidden
>
--
-Corey O'Connor
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Cocoa-dev mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden
| References: | |
| | >VBL sync (From: Valerio Ferrucci <email@hidden>) |
| | >Re: VBL sync (From: Ricky Sharp <email@hidden>) |
| | >Re: VBL sync (From: Valerio Ferrucci <email@hidden>) |