ffffuuuullllllllssssccccrrrrnnnn allows a program write to the entire screen. It does this by
eliminating the protections that normally prevent a graphics process from
drawing outside of its current window. ffffuuuullllllllssssccccrrrrnnnn calls
vvvviiiieeeewwwwppppoooorrrrtttt((((0000,,,, ggggeeeettttggggddddeeeesssscccc((((GGGGDDDD____XXXXPPPPMMMMAAAAXXXX))))----1111,,,, 0000,,,, ggggeeeettttggggddddeeeesssscccc((((GGGGDDDD____YYYYPPPPMMMMAAAAXXXX))))----1111)))) and oooorrrrtttthhhhoooo2222 to
set up an orthographic projection that maps world coordinates to screen
coordinates. The current viewport and matrix state are not saved; it is
the caller's responsibility to do this.
ffffuuuullllllllssssccccrrrrnnnn only affects graphics output; input focus management is
unchanged.
SSSSEEEEEEEE AAAALLLLSSSSOOOO
endfullscrn, winopen
NNNNOOOOTTTTEEEESSSS
This routine is available only in immediate mode.
Use ffffuuuullllllllssssccccrrrrnnnn with caution or a sense of humor.