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
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