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Masking a UIImage with a mask UIImage in iOS
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| - (UIImage*) maskImageWithMask:(UIImage *) mask | |
| { | |
| CGImageRef imageReference = self.CGImage; | |
| CGImageRef maskReference = mask.CGImage; | |
| CGImageRef imageMask = CGImageMaskCreate(CGImageGetWidth(maskReference), | |
| CGImageGetHeight(maskReference), | |
| CGImageGetBitsPerComponent(maskReference), | |
| CGImageGetBitsPerPixel(maskReference), | |
| CGImageGetBytesPerRow(maskReference), | |
| CGImageGetDataProvider(maskReference), | |
| NULL, // Decode is null | |
| YES // Should interpolate | |
| ); | |
| CGImageRef maskedReference = CGImageCreateWithMask(imageReference, imageMask); | |
| CGImageRelease(imageMask); | |
| UIImage *maskedImage = [UIImage imageWithCGImage:maskedReference]; | |
| CGImageRelease(maskedReference); | |
| return maskedImage; | |
| } |
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Original was leaking memory