Posted by Demoscene Passivist on Oct 22, 2011; 12:34pm
URL: https://forum.jogamp.org/Creating-large-images-tp3441979p3443493.html

Yep, I had a similar problem recently and also didn't found a solution to it. It seems that you can create a OpenGL window that is larger that the current screen resolution, but when grabbing the output back to write it into an image the "out-of-screen-area" is black/white.

This is no isolated 1.1.1a its also the case when using the newest JOGL2 builds (b#500+) either with AWT or NEWT. My best guess is that it has stg to do with the OpenGL driver and is not really an issue of JOGL in particular.

Anyway, a possible solution is ofcourse to render the image to a FBO (8192x8192 is possible on most GPUs) and then copy it back in multiple tiles.

Maybe someone has a better idea ?