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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  prop-
       erly, but because of the Lispm microcode, such arrays are probably 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)