The CrystalEyesOutput class will interface the required system libraries
in order to output stereo images to the SGI system's CrystalEyes subsystem.
Its PutImage() method will never normally return NULL, as subsequent stereo images can always be displayed to the screen, as with IndycamInput, only hardware errors and the like will cause NULL be returned. The module may display the stereo image in an X11 window if possible11, in fullscreen mode otherwise. The FinaliseImage() method will allow some degree of interactivity before the program is exited.