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1995-02-13
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ppmtops(1) PBM Plus ppmtops(1)
NAME
ppmtops - convert a portable pixmap into color Encapsulated
PostScript
SYNOPSIS
ppmtops [-scale <x>] [<ppmfile>]
DESCRIPTION
Reads a portable pixmap as input. Produces Encapsulated
PostScript as output, using the colorimage operator. This
operator is only defined on color printers and very recent
B&W printers. Most of the time you will NOT want to use
ppmtops; instead, do a ppmtopgm | pgmtops.
The -scale flag controls the scale of the result. The
default scale is 1, which results in one ppm pixel producing
a 3x3 square of PostScript pixels. On a 300 dpi printer
such as the Apple LaserWriter, this makes the output look
about the same size as the input would if it was displayed
on a typical 72 dpi screen. To get one ppm pixel per Laser-
Writer pixel, use "-s 0.333333".
All flags can be abbreviated to their shortest unique pre-
fix.
Note that there is no pstoppm tool - this transformation is
one-way, because a pstoppm tool would be a full-fledged
PostScript interpreter, which is beyond the scope of this
package.
SEE ALSO
ppm(5), pgmtops(1), psidtopgm(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 docu-
mentation. This software is provided "as is" without
express or implied warranty.
Printed 5/25/90 01 September 1989 1