I am implementing code on top of an existing project.
The display shows a GLCanvas. Is there a way to take a screenshot of that code. I have tried to use technique of using finding a rectangle of where the GLCanvas is on the screen and then taking a screenshot of that, but if other windows are overlapping the GLCanvas, they will be included in the screenshot as well.
Try glReadPixels. Matt wrote a rather nice implementation (based on some of my crap code):
http://www.matthiasmann.de/content/view/15/26/
(It’s LWJGL though, but porting it should be pretty straightforward.)
You may first have a look at the Screenshot class of JOGL.
I guess that it is what your looking for.
Jean-Baptiste
Ah right. JOGL does have a class for this. 