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Re: Help with printing an NSOpenGLView

On Thursday, December 5, 2002, at 03:25 PM, John M Coggi wrote:
Hi. I'm writing a multi-document OpenGL app and would like to allow the user to print the contents of a window. I've scoured the Apple Developer website and all the Cocoa dev sites I know and have found very little pertaining to printing and OpenGL views
in Cocoa. It seems like this would be a common thing for OpenGL applications to do. Geoff, John S., or perhaps someone else on this list, do you have any sample code showing how to print an OpenGL view?

The standard AppKit printing mechanism works by simply redirecting Quartz drawing, so printing of OpenGL views isn't automatically supported. What you can do, however, is grab a snapshot of your NSOpenGLView's contents as a bitmap by using glReadPixels() to read from the framebuffer. You can then print the resultant bitmapped image.

Troy Stephens
Cocoa frameworks, Apple
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