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ppcl.man
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1997-10-05
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ppcl - a PCL raster data compressor
===================================
(works only with LJ3 or newer!)
This program reads in PCL files or sprites and writes them out again,
compressing the raster areas (PCL) / bitmap (sprite). PCL data is
dealt with in 2 passes.
call:
ppcl [options] <infile> <outfile>
where possible options are:
-m x force compression mode of output to mode x (can be 0,2,3).
default value: 0, means optimum compression, i.e. switching
between compression modes to create minimum length files.
If your printer doesn't understand compression mode 3 you
can always force mode 2 that way. Otherwise just let the
program decide what's best.
-w write widths of raster areas (e.g. ESC*r256s1A instead of
ESC*r1A). The printer doesn't seem to need it but it might
help with clipping sometimes. Default: off
-v verbose mode - output information about each raster area
encountered.
-s the input file is a *monochrome* (!) sprite.
-c x in case of sprite mode: ignore x pixels from the right (crop).
This might be useful sometimes (I've come across bad ChangeFSI
output, for instance - one additional black pixel to the
right...)
ppcl will perform best when used on regular graphics (text, vector
diagrams,...) where it can often crunch down a file to 30%-40% the
size it had with mode 2 compression (and the resulting output file
can be sent directly to the printer!). Savings will be rather poor
with irregular stuff like error-diffused dithering.
In the case of a sprite the output is not directly printable! The
output file is merely a raster area that has yet to be embedded in
page format and positioning commands. To create a ready-to-print
file use "plr", also part of this release.
THIS PROGRAM IS FREEWARE. YOU MAY COPY IT FREELY AS LONG AS NO PART OF IT
IS CHANGED AND IT'S NOT SOLD FOR PROFIT. I RETAIN THE COPYRIGHT.
I WILL NOT ACCEPT ANY RESPONSIBLITY FOR ANY DAMAGES CAUSED BY THE USE OF
THIS PROGRAM, IMPLICITLY OR EXPLICITLY. USE IT ENTIRELY AT YOUR OWN RISK.
Andreas Dehmel
Am Schorn 18
82327 Tutzing
Germany
dehmel@forwiss.tu-muenchen.de