Compressed Postscript bitmat format.

[Doug Evans <DE%phoenix.sch.symbolics.com@RELAY.CS.NET>]

    Date: Wed, 5 Apr 89 09:54:29 PDT
    From: felix@Warbucks.AI.SRI.COM (Francois Felix INGRAND)


    I am writing a report and I am including some hardcopies of the Lisp
    Machine screen (Postscript format) in it. To avoid any cutting/pasting,
    I include the "postscript file" in my document (using the \special
    command with LaTeX/dvips).

    Unfortunately, each screen dump is approximately 220 K...
    Considering that I will have 60 screen dumps... It makes 12 Mega of
    pictures for this report... (that I have to keep under postscript
    format for inclusion)

    I had a quick look to the format used in this screen dump, and it
    looks like it is not compressed at all. When I run it thru "compress"
    I get a 91.08% compression rate (after all, these screens are almost white).

    I was just wondering if anybody have already written, in lisp for the
    Lisp Machine side, and in postscript for the printer side, a small
    "compressor".

    Thanks in advance,

    Felix

If anyone has such a compression scheme for PostScript that can be run
in a Lispm and decoded by a LaserWriter, I personally (and probably
Symbolics in general) would **REALLY** be interested in seeing it.  I
have several of my own bitmap programs that would benefit from such a
program.