Problem when masking UIImage

[yoasha]

I took a sample code from the following URL how to mask an image in order to mask an image.

The code is working perfectly on the iPhone simulator but works incorrectly on iPhone 4 simulator (that's when high-res images are loaded...)

Here is my code and the mask function:

    - (void)someMethod {

        UIImage* image = [UIImage imageNamed:@"image.png"];  // image@2x.png is loaded for high-res device

        UIImage* mask = [UIImage imageNamed:@"mask.png"];  // mask@2x.png is loaded for high-res device

        UIImage* maskedImage = [self maskImage:image withMask:mask];

        // ... Some code here displaying maskedImage

    }

    - (UIImage *)maskImage:(UIImage *)image withMask:(UIImage *)maskImage {
 
        UIImage* maskedImage = nil;
      
        CGImageRef maskRef = maskImage.CGImage; 
 
        CGImageRef mask = CGImageMaskCreate(CGImageGetWidth(maskRef),               
                                        CGImageGetHeight(maskRef),
                                        CGImageGetBitsPerComponent(maskRef),
                                        CGImageGetBitsPerPixel(maskRef),
                                        CGImageGetBytesPerRow(maskRef),
                                        CGImageGetDataProvider(maskRef), NULL, false);
 
        CGImageRef masked = CGImageCreateWithMask([image CGImage], mask);
        maskedImage = [UIImage imageWithCGImage:masked];
 
        return maskedImage;
    }

On the iPhone 4 simulator the "image@2x.png" and "mask@2x.png" are loaded and then the resulted maskedImage is cropped.

Any idea what am I doing wrong?

[Elsammak]

Originally Posted by yoasha

I took a sample code from the following URL how to mask an image in order to mask an image.

The code is working perfectly on the iPhone simulator but works incorrectly on iPhone 4 simulator (that's when high-res images are loaded...)

Here is my code and the mask function:

    - (void)someMethod {

        UIImage* image = [UIImage imageNamed:@"image.png"];  // image@2x.png is loaded for high-res device

        UIImage* mask = [UIImage imageNamed:@"mask.png"];  // mask@2x.png is loaded for high-res device

        UIImage* maskedImage = [self maskImage:image withMask:mask];

        // ... Some code here displaying maskedImage

    }

    - (UIImage *)maskImage:(UIImage *)image withMask:(UIImage *)maskImage {
 
        UIImage* maskedImage = nil;
      
        CGImageRef maskRef = maskImage.CGImage; 
 
        CGImageRef mask = CGImageMaskCreate(CGImageGetWidth(maskRef),               
                                        CGImageGetHeight(maskRef),
                                        CGImageGetBitsPerComponent(maskRef),
                                        CGImageGetBitsPerPixel(maskRef),
                                        CGImageGetBytesPerRow(maskRef),
                                        CGImageGetDataProvider(maskRef), NULL, false);
 
        CGImageRef masked = CGImageCreateWithMask([image CGImage], mask);
        maskedImage = [UIImage imageWithCGImage:masked];
 
        return maskedImage;
    }

On the iPhone 4 simulator the "image@2x.png" and "mask@2x.png" are loaded and then the resulted maskedImage is cropped.

Any idea what am I doing wrong?

I've the same problem but in the device itself!! what should I do??