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Orientation normalisation before cropping/merging #14

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Orientation normalisation before cropping/merging #14

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488eab3
Add image normalisation before cropping/merging chunk
kanunnikau Mar 16, 2016
fd6b43f
Added reference to gist
kanunnikau Mar 16, 2016
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38 changes: 22 additions & 16 deletions UIImage+BlurredFrame.m
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Original file line number Diff line number Diff line change
Expand Up @@ -10,32 +10,38 @@

@implementation UIImage (BlurredFrame)

-(UIImage *)croppedImageAtFrame:(CGRect)frame
{
- (UIImage *)croppedImageAtFrame:(CGRect)frame {
frame = CGRectMake(frame.origin.x * self.scale, frame.origin.y * self.scale, frame.size.width * self.scale, frame.size.height * self.scale);
CGImageRef sourceImageRef = [self CGImage];
UIImage *rotatedImage = self;
// make sure its orientation is up otherwise later on we'll have trouble merging
// based on this gist: https://gist.github.com/aleph7/5717438
if (self.imageOrientation != UIImageOrientationUp) {
rotatedImage = [self addImageToImage:nil atRect:CGRectZero];
}
CGImageRef sourceImageRef = [rotatedImage CGImage];
CGImageRef newImageRef = CGImageCreateWithImageInRect(sourceImageRef, frame);
UIImage *newImage = [UIImage imageWithCGImage:newImageRef scale:[self scale] orientation:[self imageOrientation]];
UIImage *newImage = [UIImage imageWithCGImage:newImageRef scale:[self scale] orientation:UIImageOrientationUp];
CGImageRelease(newImageRef);
return newImage;
}

#pragma mark - Marge two Images
#pragma mark - Merge two Images

- (UIImage *) addImageToImage:(UIImage *)img atRect:(CGRect)cropRect{

CGSize size = CGSizeMake(self.size.width, self.size.height);
- (UIImage *)addImageToImage:(UIImage *)img atRect:(CGRect)cropRect {
CGSize size = self.size;
UIGraphicsBeginImageContextWithOptions(size, NO, self.scale);
CGPoint pointImg1 = CGPointMake(0,0);

CGPoint pointImg1 = CGPointMake(0, 0);
[self drawAtPoint:pointImg1];

CGPoint pointImg2 = cropRect.origin;
[img drawAtPoint: pointImg2];

UIImage* result = UIGraphicsGetImageFromCurrentImageContext();

if (img != nil && !CGRectEqualToRect(CGRectZero, cropRect)) {
CGPoint pointImg2 = cropRect.origin;
[img drawAtPoint:pointImg2];
}

UIImage *result = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

return result;
}

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