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Lispmtopgm User Manual(0) Lispmtopgm User Manual(0)
NAME
lispmtopgm - convert a Lisp Machine bitmap file to PGM
SYNOPSIS
lispmtopgm [lispmfile]
DESCRIPTION
This program is part of Netpbm(1).
listpmfile reads a Lisp Machine bitmap as input and produces a PGM
image as output.
This is the file format written by the tv:write-bit-array-file function
on TI Explorer and Symbolics lisp machines.
Multi-plane bitmaps on lisp machines are color; but the Lispm image
file format does not include a color map, so we must treat it as a
monochrome instead and produce PGM. This is unfortunate.
SEE ALSO
pgmtolispm(1), pgm(1)
LIMITATIONS
The Lispm bitmap file format is a bit quirky; Usually the image in the
file has its width rounded up to the next higher multiple of 32, but
not always. If the width is not a multiple of 32, we don't deal with
it properly, but because of the Lispm microcode, such arrays are proba-
bly not image data anyway.
Also, the Lispm code for saving bitmaps has a bug, in that if you are
writing a bitmap which is not mod32 across, the file may be up to 7
bits too short! They round down instead of up, and we don't handle
this bug gracefully.
AUTHOR
Copyright (C) 1991 by Jamie Zawinski and Jef Poskanzer.
netpbm documentation 06 March 1990 Lispmtopgm User Manual(0)
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Sat Sep 8 16:33:47 GMT 2007
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