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lispmtopgm
!!!lispmtopgm
NAME
SYNOPSIS
DESCRIPTION
SEE ALSO
BUGS
AUTHOR
----
!!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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Last edited on Monday, June 3, 2002 6:50:26 pm by "perry"

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