> First off, apologies if my terminology is all wrong, I'm only a couple of
> days into exploring Quartz Composer.
>
> I've created a simple composition which has a defined image output. In my
> Cocoa project I've managed to display the image properly using a
> QCQuartzCompositionLayer but ideally I'd like to be able to grab the image on
> demand without rendering it to screen. I therefore started looking into
> QCRenderer but am now struggling to get things working.
Are you trying to get the rendered output (e.g. what you see on the layer), or
a published output (normally not displayed in a layer)? Your code appears to
be trying to get a published output (valueForOutputKey:…), but if you want a
"screenshot", you should use -snapshotImage or -createSnapshotImageOfType:.
> Error running Quartz Composition '‡CÅpˇ': -[QCRenderer
> initWithComposition:colorSpace:]: Inconsistent state
Can you please provide the following:
* Example composition (you can strip out sensitive bits if it makes you
feel better)
* Example Xcode project (you should strip out sensitive bits)
* A backtrace/crash log (if available -- since this is an exception it
might be less informative)
> So, does anyone have any idea what I'm doing wrong or can anyone give me some
> advice about retrieving an image from a composition in a QCRenderer.
https://developer.apple.com/library/mac/#samplecode/QuartzComposerOffline/Listings/main_m.html
--
Christopher Wright
[email protected]
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