Re: Disable VBL sync on per-screen basis?

Subject: Re: Disable VBL sync on per-screen basis?

From: vade <email@hidden>

Date: Wed, 27 Feb 2008 01:07:20 -0500

Delivered-to: email@hidden

I forgot to mention you can then set the NSView to be full screen on one screen using something like.

if ([[NSScreen screens]count]>1)

{

renderScreen = [[NSScreen screens] objectAtIndex:1] ;

}

else renderScreen = [NSScreen mainScreen];

[v001View enterFullScreenMode:renderScreen withOptions:nil];

Note enterFullScreenMode is 10.5 only afaik.

Nothing stopping you from having two NSOpenGL Views, if you would need it...

On Feb 26, 2008, at 1:22 PM, Michael Diehr wrote:

The secret option to disable VBL sync can give a massive increase in performance in the case when you have a single QC composition stretched across two screens, which is an odd but fairly common configuration for some QC video art pieces.      Disabling VBL leads to image tearing, which is visually unappealing depending on the content being displayed.

Question -- is it possible to disable VBL on a per-screen basis inside QC?   In many cases, screen #1 is a UI screen not visible to the public on which VBL can be safely ignored, whereas screen #2 is the performance screen where syncing with VBL would be nice.
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References:

>Disable VBL sync on per-screen basis? (From: Michael Diehr <email@hidden>)