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.
OPTIONS
The flip operations available are: left for right
(-leftright
or
R -lr );
top for bottom
(-topbottom
or
R -tb );
and transposition
(-transpose
or
R -xy ).
In addition, some canned concatenations are available:
-rotate90
or
-ccw
is equivalent to
-transpose
R -topbottom ;
-rotate270
or
-cw
is equivalent to
-transpose
R -leftright ;
and
-rotate180
is equivalent to
-leftright
R -topbottom .
All flags can be abbreviated to their shortest unique prefix.
SEE ALSO
pnmrotate(1), pnm(5)
AUTHOR
Copyright (C) 1989 by Jef Poskanzer.
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