.TH pnmflip 1 "25 July 1989"
.SH NAME
pnmflip - perform one or more flip operations on a portable anymap
.SH SYNOPSIS
pnmflip [-leftright|-lr] [-topbottom|-tb] [-transpose|-xy]
    [-rotate90|-r90|-ccw] [-rotate270|-r270|-cw]
    [-rotate180|-r180] [pnmfile]
.SH DESCRIPTION
Reads a portable anymap as input.
Performs one or more flip operations, in the order specified, and
writes out a portable anymap.
.PP
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.
.PP
All flags can be abbreviated to their shortest unique prefix.
.SH "SEE ALSO"
pnm(5), ppmrotate(1)
.SH 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.