Flipping an Image

The Processing menu contains a group of Flip Vertically and Flip Horizontally items.

The following code fragment demonstrates a vertical flip:

	Copy Code
- (IBAction)mnuProcessingFlipV:(id)sender { if(IG_image_is_valid(hIGear)) { IG_IP_flip(hIGear, IG_FLIP_VERTICAL); // Update main view [mainScrollViewOutlet setNeedsDisplay:YES]; } }

Similarly, using the IG_FLIP_HORIZONTAL constant for the last argument of IG_IP_flip() flips an image horizontally.

As in the case of Rotating an Image, this function physically rearranges the pixels of your source image.

This is an original image flipped vertically: