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#!/bin/bash
# epscrop -- crop EPS files using ghostscript
# Copyright (C) 2002, Maarten Ditzel
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# process arguments
infile=$1
if [ "$1" == "-h" ]; then
echo "synopsis: epscrop <file>"
echo "author: Maarten Ditzel (February 2002)"
echo "description: adjusts the bounding box of <file> to fit"
exit 1
fi
if (( $# < 1 )); then
echo "no input file specified"
exit 2
fi
# create a temporary directory
tmpdir=/tmp/epscrop-$$
mkdir $tmpdir
# check ghostscript version (both GNU and Aladdin should work)
gstype=`gs -v | awk '/^GNU|AFPL/ { print $1; }'`
version=`gs -v | awk '/^GNU|AFPL/ { print $3; }'`
major=`echo $version | awk -F "." '{ print $1; }'`
minor=`echo $version | awk -F "." '{ print $2; }'`
if [[ (( $major > 5 )) && (( $minor > 50 )) ]]; then
# retrieve the bounding box
gs -dNOPAUSE -sDEVICE=bbox -q $infile quit.ps 2> $tmpdir/bbox
else
# bbox device doesn't seem to work for previous versions
# thus we use epswrite to find the bounding box
# Q: why don't we use epswrite all the time ?
# A: it returns a poor quality eps
# Q: why don't we use the psbb program ?
# A: only returns the boundingbox already specified in the file
# and the whole point is to replace it with a cropped version
gs -dNOPAUSE -sDEVICE=epswrite -sOutputFile=$tmpdir/bbox.eps -q $infile quit.ps
grep BoundingBox $tmpdir/bbox.eps > $tmpdir/bbox
fi
# get the cropped bounding box
bbox=`awk '/^%%BoundingBox:/ { print $2,$3,$4,$5; }' $tmpdir/bbox`
# create awk script
cat <<EOF > $tmpdir/epscrop.awk
# created by epscrop
BEGIN {
bbdone = 0;
}
/^%%BoundingBox/ {
if (!bbdone) {
print \$1, bbox;
bbdone = 1;
}
else
print;
}
!/^%%BoundingBox/ {
print;
}
EOF
# adjust bounding box
awk -v bbox="$bbox" -f $tmpdir/epscrop.awk $infile
# remove the temporary directory
rm -r $tmpdir
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