Posted by Wade Walker on May 22, 2011; 8:39pm
URL: https://forum.jogamp.org/how-do-i-tint-the-screen-tp2965935p2972769.html

Check the docs for framebuffer objects (FBOs):

http://en.wikipedia.org/wiki/Framebuffer_Object
http://www.songho.ca/opengl/gl_fbo.html

The idea is to render offscreen, then postprocess the rendered image, then display it.