I'm doing something like this for live resize operations, but there
is sometimes a need to change the base resolution that QC is actually
rendering to... I don't think QCRenderer picks up on the viewport
change.
Also my app needs to be able to capture displays, which will
necessitate reloading the renderers for a full-screen context (and
freeing the old ones first to prevent resource conflict).
-DT
I also posted to the cocoa-dev list, and I got this reply --
--Are you using an NSMutableArray to add QCRenderers?
--I had quite the same problem when I've upgraded the system to 10.4.7.
--I changed the NSMutableArray with a NSArray and now it works.
--regards,
--Francesca
weird, huh? Does anybody know why this is?
On Jul 25, 2006, at 12:02 PM, Eric Redlinger wrote:
Hey Dan,
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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