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pgmtolispm - convert a portable graymap into Lisp Machine format
Reads a portable graymap as input. Produces a Lisp Machine bitmap as output.
This is the file format read by the tv:read-bit-array-file function on TI Explorer and
Symbolics lisp machines.
Given a pgm (instead of a pbm) a multi-plane image will be output. This is probably not
useful unless you have a color lisp machine.
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.
Output width is always rounded up to the nearest multiple of 32; this might not always be
what you want, but it probably is (arrays which are not modulo 32 cannot be passed to the
Lispm BITBLT function, and thus cannot easily be displayed on the screen).
Copyright (C) 1991 by Jamie Zawinski and Jef Poskanzer.
06 March 1990 pgmtolispm(1)
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