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 <mac.iphone....@gmail.com> 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 (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: > https://lists.apple.com/mailman/options/cocoa-dev/david.duncan%40apple.com > > This email sent to david.dun...@apple.com -- 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
