[9fans] cjpeg/djpeg

[mirtchov@cpsc.ucalgary.ca]

the jpeg library port which comes with the Links package has two
programs, cjpeg and djpeg, whose usefulness I have neglected up until
last night.

the programs are not installed on your system by default, but if you
do a:

	cp links-ape/jpeg/8.cjpeg $home/bin/386/

then you can have a very simple 'tojpg' script as follows:

	plan9% cat /bin/tojpg
	#!/bin/rc

	file=''
	switch ($#*) {
		case 1
			file=$1
	}

	toppm $file | cjpeg
	plan9%

or a 'jpg' script that looks like this (after copying the djpeg
binary):

	plan9% cat /bin/jpg2
	#!/bin/rc

	file=''
	switch ($#*) {
		case 1
			file=$1
	}

	djpeg $file | ppm
	plan9%

andrey