On Thu, 15 Sept 2022 at 23:17, Gonzalo wrote:

> > So... like creating an offscreen GL surface, and then getting the context for that, perhaps?
>
> Yes.  The issue is that the offscreen GL surface is not drawn inside the GL window’s draw() method, so there’s no GL context.
>

Yes, but GL contexts under FLTK are a bit weird in that you can
(pretty much, anyway) draw to them outside of the regular draw()
method - if you can get a suitable reference to the  context, then
using the usual GL techniques you can then draw stuff into that
context "as you go along"; so that might be sufficient for your needs?
I guess that is what Manolo was meaning when he said "You can access
the GL context with public member Fl_Gl_Window->context()" earlier?
Not sure...

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