Re: Printing a layer-backed view

FROM : Troy Stephens
DATE : Fri Jan 04 18:56:30 2008

On Jan 4, 2008, at 2:27 AM, Timothy J. Wood wrote:
> I'm hoping that this is possible, but so far it seems like NSView's 
> that are layer-backed don't print (not even a bitmap!)
>
>  Tell me I'm wrong and we haven't stepped back into the dark ages... 
> =)
>
> -tim


Hi Tim,

Sorry to say there is indeed a bug that causes the views' drawing to 
be redirected to their backing layers, even though the views are being 
asked to draw for the purpose of printing.

Ways this can be worked around:

(1) temporarily switch off layer-backing of the view (or view 
hierarchy) during printing, or

(2) print from an identically configured offscreen view (or hierarchy) 
that isn't layer-backed, or

(3) if your views are employing visual effects that only work in layer-
backed mode (effects that are rendered by Core Animation: view 
filters, shadows, alpha) and you need those same effects to appear in 
the printed output, use a CARenderer to render the layer tree to 
bitmapped form, then print the bitmap.

I'll see about fixing this.  In the meantime, I hope the above will 
help get you un-stuck.

Regards,
Troy


--
Troy Stephens
Cocoa Frameworks
Apple, Inc.