IM not entirely sure what the issue is, but, two things a) it appears that you are leaking a CGColorpaceRef every time you output a new image. Its small but, over time, may be an issue.
speaking of color spaces, I have had in the past, very weird issues with colorspaces that are not the contexts colorspace, or marked as wanting color correction. perhaps your issue is resolvable by marking shouldColorMatch: as YES . I know it seems trite, but it has solved some issues with Queues in the past for me (on earlier OS X versions at least). Some more code / context would help however On Mar 19, 2013, at 2:18 PM, Flo Loferer <[email protected]> wrote: > Hey there guys, > > I was hoping that you could help me with a little problem I can't figure out > a solution for. > I had some code for image processing that's returning a monochrome image. > > The next patch however is expecting an RGB input image so I'm blowing up the > monochrome image to RGBA in a simple for loop. > When I then export the image by doing: > > self.outputImage = [context > outputImageProviderFromBufferWithPixelFormat:QCPlugInPixelFormatRGBAf > > pixelsWide:width > > pixelsHigh:height > > baseAddress:tempFloatArray > > bytesPerRow:width * sizeof(float) *4 //RGBA > > releaseCallback:_BufferReleaseCallback > > releaseContext:self > > colorSpace:CGColorSpaceCreateWithName(kCGColorSpaceGenericRGBLinear) > > shouldColorMatch:YES]; > > It works just fine. > To reduce both the processing time and also the memory footprint I wanted to > pass on the monochrome image as is without the unnecessary RGB blowup. > > However, I keep getting weird exceptions when I try to use this: > > self.outputImage = [context > outputImageProviderFromBufferWithPixelFormat:QCPlugInPixelFormatIf > > pixelsWide:width > > pixelsHigh:height > > baseAddress:tempFloatArray > > bytesPerRow:width * sizeof(float) > > releaseCallback:_BufferReleaseCallback > > releaseContext:self > > colorSpace:CGColorSpaceCreateWithName(kCGColorSpaceGenericGray) > > shouldColorMatch:NO]; > > > > QC terminates with an exception saying: > > -[_NSWindowTransformAnimation retain]: message sent to deallocated instance > 0x18bf7c0 > > I checked in Instruments and tried to hunt down the zombie but I couldn't > find out where it is coming from. > It must be related to the output image because if I set it to nil, the > exception isn't thrown although the processing path is the same until there. > > Is it possible that having an output image with a different pixel format than > the context is problematic? > I remember having had problems with textures with different pixel formats. > > All tips are very welcome! > Thanks very much in advance! > > Best regards, > > Flo > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list ([email protected]) > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/quartzcomposer-dev/anton%40noiseindustries.com > > This email sent to [email protected]
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