Re: NSShadow with [bezierPath addClip]
Re: NSShadow with [bezierPath addClip]
- Subject: Re: NSShadow with [bezierPath addClip]
- From: Gordon Apple <email@hidden>
- Date: Fri, 03 Jan 2014 14:09:08 -0500
- Thread-topic: NSShadow with [bezierPath addClip]
> David,
>
> Now, if someone could just tell me why AVPlayerLayer won¹t produce a shadow,
> when there is no such problem with QTMovieLayer in the same environment...
>
>
> ===================================================
> Message: 1 Date: Wed, 01 Jan 2014 17:44:01 -0800 From: David Duncan
> <email@hidden> To: Leonardo <email@hidden> Cc: Cocoa-dev
> <email@hidden> Subject: Re: NSShadow with [bezierPath addClip]
> Message-ID: <email@hidden> Content-Type:
> text/plain; charset=us-ascii 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@hidden> 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 > > >
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> This email sent to email@hidden -- David Duncan
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