How can I save the image from IKImageView? - objective-c

Question

Okay... I want to save the visible rectangle of the IKImageView image only.
My problem is that, somehow, if I had an image in portrait mode it will be not saved in the right orientation. I drawing the image with this code:
[sourceImg drawInRect:targetRect fromRect:sourceRect operation:NSCompositeSourceOver fraction:1.0f];
On the other side if I draw the image with this code:
[sourceImg drawAtPoint:NSZeroPoint fromRect:sourceRect operation:NSCompositeSourceOver fraction:1.0f];
It will be in the right orientation, but edits like zooming are lost. I mean it will save the right cut out, but unfortunately not in the right size.
Here is the code how I load the image:
- (IBAction)imageSelectionButtonAction:(id)sender {
NSLog(#"%s", __FUNCTION__);
NSOpenPanel *panel = [NSOpenPanel openPanel];
id model = [self getModel];
if (imageView) {
[panel setAllowedFileTypes:[NSImage imageFileTypes]];
[panel beginSheetModalForWindow:[[NSApplication sharedApplication] mainWindow] completionHandler:^(NSInteger returnCode) {
if (returnCode == 1) {
NSURL *imageUrl = [panel URL];
CGImageRef image = NULL;
CGImageSourceRef isr = CGImageSourceCreateWithURL( (__bridge CFURLRef)imageUrl, NULL);
if (isr) {
NSDictionary *options = [NSDictionary dictionaryWithObject: (id)kCFBooleanTrue forKey: (id) kCGImageSourceShouldCache];
image = CGImageSourceCreateImageAtIndex(isr, 0, (__bridge CFDictionaryRef)options);
if (image) {
_imageProperties = (__bridge_transfer NSDictionary*)CGImageSourceCopyPropertiesAtIndex(isr, 0, (__bridge CFDictionaryRef)_imageProperties);
_imageUTType = (__bridge NSString*)CGImageSourceGetType(isr);
}
CFRelease(isr);
}
if (image) {
[imageView setImage:image imageProperties:_imageProperties];
CGImageRelease(image);
}
[[model saveTempMutabDict] setValue:[imageUrl absoluteString] forKey:#"tempImage"];
}
}];
return;
}
}
And here is the code how I save it:
- (void)saveImage:(NSString *)path {
// get the current image from the image view
CGImageRef sourceImgRef = [imageView image];
NSRect targetRect = [imageView visibleRect];
NSImage *sourceImg = [[NSImage alloc] initWithCGImage:sourceImgRef size:NSZeroSize];
NSMutableDictionary *thisTiffDict = [_imageProperties valueForKey:#"{TIFF}"];
NSInteger theOrientation = [[thisTiffDict valueForKey:#"Orientation"] integerValue];
NSImage *targetImg = nil;
if (theOrientation == 6) {
targetImg = [[NSImage alloc] initWithSize:NSMakeSize([imageView frame].size.height, [imageView frame].size.width)];
} else {
targetImg = [[NSImage alloc] initWithSize:NSMakeSize([imageView frame].size.width, [imageView frame].size.height)];
}
NSRect sourceRect = [imageView convertViewRectToImageRect:targetRect];
[targetImg lockFocus];
[[NSGraphicsContext currentContext] setImageInterpolation:NSImageInterpolationHigh];
[sourceImg drawAtPoint:NSZeroPoint fromRect:sourceRect operation:NSCompositeSourceOver fraction:1.0f];
[targetImg unlockFocus];
_saveOptions = [[IKSaveOptions alloc] initWithImageProperties:_imageProperties imageUTType: _imageUTType];
NSString * newUTType = [_saveOptions imageUTType];
CGImageRef targetImgRef = [targetImg CGImageForProposedRect:NULL context:[NSGraphicsContext currentContext] hints:nil];
if (targetImgRef) {
NSURL *url = [NSURL fileURLWithPath: path];
CGImageDestinationRef dest = CGImageDestinationCreateWithURL((__bridge CFURLRef)url, (__bridge CFStringRef)newUTType, 1, NULL);
if (dest) {
CGImageDestinationAddImage(dest, targetImgRef, (__bridge CFDictionaryRef)[_saveOptions imageProperties]);
CGImageDestinationFinalize(dest);
CFRelease(dest);
}
}
}
I have no idea what I'm doing wrong?
Thank you
Jens