lispmtopgm(1) - phpMan

lispmtopgm(1)                        General Commands Manual                        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  mul-
       tiple  of 32, we don't deal with it properly, but because of the Lispm microcode, such ar-
       rays 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 in-
       stead 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)

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