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), pgm(5)

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 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.

       No color.

AUTHOR

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

                                                  06 March 1990                                    lispmtopgm(1)