NAME

pnmflip - perform one or more flip operations on a portable anymap

SYNOPSIS

pnmflip [-leftright|-lr] [-topbottom|-tb] [-transpose|-xy]
    [-rotate90|-r90|-ccw] [-rotate270|-r270|-cw]
    [-rotate180|-r180] [pnmfile]

DESCRIPTION

Reads a portable anymap as input.  Performs one or more flip operations, in the order specified, and writes out a portable anymap. 

The flip operations available are: left for right (-leftright or -lr); top for bottom (-topbottom or -tb); and transposition (-transpose or -xy).  In addition, some canned concatenations are available: -rotate90 or -ccw is equivalent to -transpose -topbottom; -rotate270 or -cw is equivalent to -transpose -leftright; and -rotate180 is equivalent to -leftright -topbottom. 

All flags can be abbreviated to their shortest unique prefix. 

SEE ALSO

pnm(5), ppmrotate(1)

AUTHOR

Copyright (C) 1989 by Jef Poskanzer. 
 
Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation.  This software is provided "as is" without express or implied warranty.

Amiga Unix  —  Last change: 25 July 1989