Not sure if you can do this within Quartz Composer, but you can do
this with a Cocoa app that is using an NSOpenGLView to display the QC
composition.
:
/*
Set up our openGL context.
First set a pixel format.
Then we init our GL Context.
Set swapping for double buffers
Finally associate with our view (which we have set in our IBOutlet)
*/
NSOpenGLPixelFormatAttribute attributes[] = {NSOpenGLPFAAccelerated,
NSOpenGLPFANoRecovery, NSOpenGLPFADoubleBuffer, NSOpenGLPFADepthSize,
24, 0};
GLint swapInterval = 1;
v001GLPixelFormat = [[NSOpenGLPixelFormat alloc]
initWithAttributes:attributes];
v001GLContext = [[NSOpenGLContext alloc]
initWithFormat:v001GLPixelFormat shareContext:nil];
[v001GLContext setValues:&swapInterval
forParameter:NSOpenGLCPSwapInterval];
[v001GLContext setView:v001View];
In the code above you would set GLint swapInterval = 0;
I tested this with my in progress app and it did not break anything
obvious.
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.
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Quartzcomposer-dev mailing list ([email protected]
)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/quartzcomposer-dev/doktorp%40mac.com
This email sent to [EMAIL PROTECTED]
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Quartzcomposer-dev mailing list ([email protected])
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/quartzcomposer-dev/archive%40mail-archive.com
This email sent to [EMAIL PROTECTED]
