# info > lispmtopgm

[lispmtopgm(1)](https://www.chedong.com/phpMan.php/man/lispmtopgm/1/markdown)               General Commands Manual              [lispmtopgm(1)](https://www.chedong.com/phpMan.php/man/lispmtopgm/1/markdown)

## NAME
       lispmtopgm - convert a Lisp Machine bitmap file into pgm format

## SYNOPSIS
       lispmtopgm [lispmfile]

## DESCRIPTION
       Reads  a  Lisp Machine bitmap as input.  Produces a portable graymap 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
       graymap instead.  This is unfortunate.

## SEE ALSO
       [pgmtolispm(1)](https://www.chedong.com/phpMan.php/man/pgmtolispm/1/markdown), [pgm(5)](https://www.chedong.com/phpMan.php/man/pgm/5/markdown)

## BUGS
       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.

       No color.

## AUTHOR
       Copyright (C) 1991 by Jamie Zawinski and Jef Poskanzer.

                                 06 March 1990                   [lispmtopgm(1)](https://www.chedong.com/phpMan.php/man/lispmtopgm/1/markdown)