Many thanks David. That did the trick. Regards -- Leonardo
> Da: David Duncan <[email protected]> > Data: Wed, 01 Jan 2014 17:44:01 -0800 > A: Leonardo <[email protected]> > Cc: Cocoa-dev <[email protected]> > Oggetto: Re: NSShadow with [bezierPath addClip] > > In CoreGraphics the way you would do this is to setup your shadow parameters, > then start a transparency layer, do your drawing there, then composite that > back to the original context. Something like this: > > CGContextSetShadow(context, shadowOffset, shadowBlur); > CGContextBeginTransparencyLayer(context, NULL); > // do your drawing > CGContextEndTransparencyLayer(context); > > You could get the graphicsPort from the NSGraphicsContext to call the > transperancy layer methods and otherwise stick to NSGraphics stuff. > > On Dec 31, 2013, at 4:15 AM, Leonardo <[email protected]> wrote: > >> In my NSView subclass, I have to draw an image within a bezierPath and apply >> an NSShadow to the result. >> So within the drawRect: method I add >> >> [bezierPath addClip]; >> [mImage drawInRect:inRect fromRect:fromRect >> operation:NSCompositeSourceOver fraction:mOpacity]; >> >> It works. The image gets clipped by the path. >> Now I would like to apply the NSShadow to the result, so before those lines >> above I add >> >> [bezierPath addClip]; >> [mShadow set]; >> [mImage drawInRect:inRect fromRect:fromRect operation:NSCompositeSourceOver >> fraction:mOpacity]; >> >> I can't get the shadow drawn because the bezierPath is clipping the drawing >> area where the shadow should fall. >> How to solve this trouble? >> I have tried to use a layer, but I get weird results when I resize, rotate >> and modify other parameters of the view. >> >> >> Regards >> -- Leonardo >> >> >> _______________________________________________ >> >> Cocoa-dev mailing list ([email protected]) >> >> 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: >> https://lists.apple.com/mailman/options/cocoa-dev/david.duncan%40apple.com >> >> This email sent to [email protected] > > -- > David Duncan > _______________________________________________ Cocoa-dev mailing list ([email protected]) 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
