1Lispmtopgm User Manual(0) Lispmtopgm User Manual(0)
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6 lispmtopgm - convert a Lisp Machine bitmap file to PGM
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10 lispmtopgm [lispmfile]
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14 This program is part of Netpbm(1).
15 listpmfile reads a Lisp Machine bitmap as input and produces a PGM
17 image as output.
18 This is the file format written by the tv:write-bit-array-file function
20 on TI Explorer and Symbolics lisp machines.
21 Multi-plane bitmaps on lisp machines are color; but the Lispm image
23 file format does not include a color map, so we must treat it as a
24 monochrome instead and produce PGM. This is unfortunate.
25
28 There are no command line options defined specifically for lispmtopgm,
29 but it recognizes the options common to all programs based on libnetpbm
30 (See
31 Common Options ⟨index.html#commonoptions⟩ .)
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35 pgmtolispm(1), pgm(1)
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39 The Lispm bitmap file format is a bit quirky; Usually the image in the
40 file has its width rounded up to the next higher multiple of 32, but
41 not always. If the width is not a multiple of 32, we don't deal with
42 it properly, but because of the Lispm microcode, such arrays are proba‐
43 bly not image data anyway.
44 Also, the Lispm code for saving bitmaps has a bug, in that if you are
46 writing a bitmap which is not mod32 across, the file may be up to 7
47 bits too short! They round down instead of up, and we don't handle
48 this bug gracefully.
49
52 Copyright (C) 1991 by Jamie Zawinski and Jef Poskanzer.
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55 This manual page was generated by the Netpbm tool 'makeman' from HTML
56 source. The master documentation is at
57 http://netpbm.sourceforge.net/doc/lispmtopgm.html
59netpbm documentation 06 March 1990 Lispmtopgm User Manual(0)