I want to render a QC comp once, display the result full screen on
the main display and a cropped portion of the result
full screen on the second display.
From what I understand I will have to create use one QCRenderer and
then use lower level OpenGL contexts in order to
crop a section and send it to the second display.
Yes, to do that efficiently, you would need to render the composition
in a pBuffer using a QCRenderer, then create an OpenGL texture from
that and display it the way you want on each screen.
