have a look at the source for Quartz Composer Performer, which also
implements resizing the output resolution. You don't need to release
the renderers, just tell them to stop rendering while you resize.
Since this all happens very quickly you almost don't even notice that
anything ever stops...
I have a cocoa app that needs to be able to render compositions at
different user-selectable resolutions.
I noticed that the QCTV sample at http://developer.apple.com/samplecode/QuartzComposer_WWDC_QCTV
implements this functionality by releasing its QCRenderers,
resizing the view/gl context, and then loading new QCRenderers.
However, whenever I try this (even in QCTV) I get an
EXC_BAD_ACCESS. A backtrace shows
#0 0xfffeff20 in objc_msgSend_rtp ()
#1 0x987e8114 in -[QCPatch(Private) _cleanup] ()
#2 0x987e7fa4 in -[QCPatch(Private) _cleanup] ()
#3 0x987e7eac in -[QCPatch(Runtime) stopRendering] ()
#4 0x9881ec14 in -[QCRenderer dealloc] ()
I'm running 10.4.7, XCode 2.3
Does anybody have any insight into this? Did this perhaps work in
a previous version?
thanks,
-Dan Treiman
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