Alvin wrote:

> With respects to the fl_copy_offscreen(), is that only needed if the 
> offscreen is to be shown?

Yes, see also my other post.

> If so, I don't need to show the offscreen, just 
> get the RGB data so I can dump it to a PNG/PPM file.

I tried to annotate your code in my other post, and I hope
that this will be readable and can assist you.

> I'm checking out those links now to determine if they apply to my needs or 
> if I can further understand the offscreen capability and create what I need. 
> If I come up with something that:
> 
> "Dumps the contents of a Fl_Group to Fl_RGB_Image" then perhaps I will make 
> an HOWTO article on fltk.org.

There is also some code in fluid. Look for print_menu_cb under the WIN32
macro, and for read_image() in another .cxx file. The latter gets an
image of a window, and the former writes this to a printer.

Albrecht
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