1Lispmtopgm User Manual(0)                            Lispmtopgm User Manual(0)
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NAME

6       lispmtopgm - convert a Lisp Machine bitmap file to PGM
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SYNOPSIS

10       lispmtopgm [lispmfile]
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DESCRIPTION

14       This program is part of Netpbm(1).
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16       listpmfile  reads  a  Lisp  Machine  bitmap as input and produces a PGM
17       image as output.
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19       This is the file format written by the tv:write-bit-array-file function
20       on TI Explorer and Symbolics lisp machines.
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22       Multi-plane  bitmaps  on  lisp  machines are color; but the Lispm image
23       file format does not include a color map, so we  must  treat  it  as  a
24       monochrome instead and produce PGM.  This is unfortunate.
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SEE ALSO

28       pgmtolispm(1), pgm(1)
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LIMITATIONS

32       The Lispm bitmap file format is a bit quirky;  Usually the image in the
33       file has its width rounded up to the next higher multiple  of  32,  but
34       not  always.   If the width is not a multiple of 32, we don't deal with
35       it properly, but because of the Lispm microcode, such arrays are proba‐
36       bly not image data anyway.
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38       Also,  the  Lispm code for saving bitmaps has a bug, in that if you are
39       writing a bitmap which is not mod32 across, the file may  be  up  to  7
40       bits  too  short!   They  round down instead of up, and we don't handle
41       this bug gracefully.
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AUTHOR

45       Copyright (C) 1991 by Jamie Zawinski and Jef Poskanzer.
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49netpbm documentation             06 March 1990       Lispmtopgm User Manual(0)