lispmtopgm (1)
NAME
lispmtopgm - convert a Lisp Machine bitmap file into pgm formatSYNOPSIS
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.