Him On Tue, Sep 11, 2012 at 8:08 PM, couchworx <bo...@couchworx.com> wrote:
> Hi, > > I'm trying for days to work with the CoreImage framework. My app let's the > user take pictures and publishes them to a cloud server. To make the > pictures a little bit more interesting I use CoreImage filters. Now, when > using the filters a couple time in row the app crashes. > > To eliminate own faults in my code I've tried the Adjust Contrast and > Brightness of an Image recipe > > http://docs.xamarin.com/ios/recipes/Media/CoreImage/Adjust_Contrast_and_Brightness_of_an_Image > > It shows the same behavior: after 5 changes of contrast/brightness on a 5 > MB > picture the app crashes. When using the 108 KB 'clouds.jpg' picture > provided > with the recipe the app crashes after around 150 changes. So it looks like > it is tied to memory usage 'internally'!? > > Here is the code straight from the recipe. > > void HandleValueChanged (object sender, EventArgs e) > { > if (colorCtrls == null) > colorCtrls = new CIColorControls () { > Image = CIImage.FromCGImage (image.CGImage), > }; > // set the values > colorCtrls.Brightness = sliderBrightness.Value; > colorCtrls.Saturation = sliderSaturation.Value; > colorCtrls.Contrast = sliderContrast.Value; > // do the transformation > var output = colorCtrls.OutputImage; > var context = CIContext.FromOptions (null); > var result = context.CreateCGImage (output, output.Extent); > // display the result in the UIImageView > imageView.Image = UIImage.FromImage(result); > Did you call Dispose on the existing imageView.Image? That said, you should probably profile your applications to see if your UIImage and CGImage instances are getting freed or not. Rolf > } > > I've already tried "using" statements around every single call and did a > lot > testing with NSAutoReleasePool's and GC.Collect(). Now I've run out of > ideas > how to get this working ..... > > I use MD 3.0.4.6 / MT 5.4.0 / XCode 4.4.1 / iOS 5.1.1 on iPhone 4GS > > Anybody has a suggestion how to proceed from here ??? > thanks > Boris > > > > > -- > View this message in context: > http://monotouch.2284126.n4.nabble.com/CoreImage-Memory-Consumption-Recipe-affected-tp4656953.html > Sent from the MonoTouch mailing list archive at Nabble.com. > _______________________________________________ > MonoTouch mailing list > MonoTouch@lists.ximian.com > http://lists.ximian.com/mailman/listinfo/monotouch >
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