fbgs

linux下开源图片codec

#!/bin/bash

# tmp dir
DIR="${TMPDIR-/var/tmp}/fbps-$$"
mkdir -p $DIR	|| exit 1
trap "rm -rf $DIR" EXIT

# parse options
fbiopts=""
gsopts=""
passwd=""
opt=1
while test "$opt" = "1"; do
	case "$1" in
		-l)	gsopts="$gsopts -r100x100"
			shift
			;;
		-xl)	gsopts="$gsopts -r120x120"
			shift
			;;
		-xxl)	gsopts="$gsopts -r150x150"
			shift
			;;
		-q | -a)
			fbiopts="$fbiopts $1"
			shift
			;;
		-d | -m | -t | -g | -f)
			fbiopts="$fbiopts $1 $2"
			shift; shift
			;;
		-p)	password="$2"
			shift; shift
			;;
		-h)	echo fixme: help text
			exit 1
			;;
		-*)	echo "unknown option: $1"
			exit 1
			;;
		*)	opt=0
			;;
	esac
done

# run ghostscript
echo
echo "### rendering pages, please wait ... ###"
echo
gs	-dSAVER -dNOPAUSE -dBATCH			\
	-sPDFPassword="$password"			\
	-sDEVICE=tiffpack -sOutputFile=$DIR/ps%03d.tiff	\
	$gsopts						\
	"$1"

# tell the user we are done :-)
echo -ne "\\007"

# sanity check
pages=`ls $DIR/ps*.jpeg 2>/dev/null | wc -l`
if test "$pages" -eq "0"; then
	echo
	echo "Oops: ghostscript wrote no pages?"
	echo
	exit 1
fi

# show pages
fbi $fbiopts -P $DIR/ps*.tiff