On 01/03/2009, at 2:31 PM, Jerry Krinock wrote:
I understand that NSAffineTransform can rotate an image while you're
drawing it. But is there any way to rotate an image and get a new
image? Something like:
NSImage* imageUp = [NSImage imageNamed:@"BaseImage"] ;
NSImage* imageLeft = [imageUp myRotateByDegrees:90] ;
...
How could I implement -[NSImage myRotateByDegrees] ?
Create the new image, swapping width and height, lock focus onto it,
apply a transform that rotates 90 degrees, and draw the first into the
second.
You can't do it without drawing, but the drawing doesn't need to be
onscreen.
--Graham
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