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(iOS) Image masking Objective-C / Swift
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//http://www.innofied.com/implementing-image-masking-in-ios/ | |
- (UIImage*) maskImage:(UIImage *) image withMask:(UIImage *) mask | |
{ | |
CGImageRef imageReference = image.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; | |
} | |
//USE | |
UIImage *image=[UIImage imageNamed:@"image2.png"]; | |
UIImage *mask=[UIImage imageNamed:@"mask6.png"]; | |
UIImage *newimage=[self maskImage:image withMask:mask]; | |
self.imageView.image=newimage; |
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Swift | |
func maskImage(image:UIImage, mask:(UIImage))->UIImage{ | |
let imageReference = image.CGImage | |
let maskReference = mask.CGImage | |
let imageMask = CGImageMaskCreate(CGImageGetWidth(maskReference), | |
CGImageGetHeight(maskReference), | |
CGImageGetBitsPerComponent(maskReference), | |
CGImageGetBitsPerPixel(maskReference), | |
CGImageGetBytesPerRow(maskReference), | |
CGImageGetDataProvider(maskReference), nil, true) | |
let maskedReference = CGImageCreateWithMask(imageReference, imageMask) | |
let maskedImage = UIImage(CGImage:maskedReference!) | |
return maskedImage | |
} | |
//USE | |
let image = UIImage(named: "image2.png") | |
let maskingImage = UIImage(named: "mask6.png") | |
imageView.image = maskImage(image!, mask: maskingImage!) |
HEYRIX
commented
May 26, 2022
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