CIGAL Reference Manual, Chapter 6 (RealTime): r_flip

r_flip -- Flip an image left to right or top to bottom

usage: r_flip opflg eflag ltime Rect Flag [DatBuf]

FLAG is a bit mask indicating the direction to flip: 

        1 - flip around the vertical axis (i.e., left to right)
        2 - flip around the horizontal axis (i.e., top to bottom)
        3 - flip left to right first, then top to bottom

See Also:
CIGAL Home, CIGAL Manual, RealTime List, Manual Help