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9 Dec 2008 How to mask an image to create irregular image shapes in iOS. of UIImageView and in its constructor make a call to the method described above. this method to work for masking an image and have come up against a brick wall. Any idea on how to use CGImageCreateWithMaskingColors with a jpg? 15 Nov 2011 Specifically, the output from CGImageCreateWithMaskingColors() can't be used as an input into another call to the same function. I haven't been able to work out 18 Mar 2015 28 Dec 2018 If you came across to a requirement where you want to make UIImage Background maskedImageRef=CGImageCreateWithMaskingColors(rawImageRef, 28 Dec 2018 maskedImage = CGImageCreateWithMaskingColor(subImage I am making with myMaskingColors and advise how to set it up to grab white Another way is to use the CGImageCreateWithMaskingColors function which acts like a sort of There is an example of how to get a pointer to the pixel data of an image at is white - it makes more sense in the example where a green background is painted. It messes up the image severely unless the floats are 1.0, 1.0.21 Mar 2017 Explains how to use Quartz 2D. Includes illustrations and sample code.