On Oct 21, 2011, at 8:23 PM, Anton Sotkov wrote: > I want to mask a CALayer with CAShapeLayer, because changes to the shape can > be animated. > > When I use the CAShapeLayer as a mask, its rounded corners are stretched. > However, if I take the same shape, create an image with it, and use the image > to mask my CALayer, the rounded corners are perfectly fine. > > What am I missing here?
The CAShapeLayer favors performance over accuracy, while Quartz favors accuracy over performance. As such it is entirely possible to get slightly different results between the APIs. > CALayer *imageBasedMaskLayer = [CALayer layer]; > [imageBasedMaskLayer setContents:(id)[[self maskWithSize:NSMakeSize(50, 50)] > CGImageForProposedRect:NULL context:nil hints:nil]]; > [imageBasedMaskLayer setFrame:CGRectMake(0, 0, 50, 50)]; Of note is that on 10.6 or later you can assign an NSImage directly as the contents of a layer, so your CGImageForProposedRect::: call is unnecessary here. -- David Duncan _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
