lispmtopgm(1)            UNIX System V(06 March 1990)             lispmtopgm(1)


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.


















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