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#!/bin/sh
#
# ppmmargin - add a margin to a portable anymap
#
# Copyright (C) 1991 by Jef Poskanzer.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose and without fee is hereby granted, provided
# that the above copyright notice appear in all copies and that both that
# copyright notice and this permission notice appear in supporting
# documentation.  This software is provided "as is" without express or
# implied warranty.

tmpdir=$(mktemp -d -t ppmmargin.XXXXXXX) || exit 1 #219019
tmp1=$tmpdir/tmp1
tmp2=$tmpdir/tmp2
tmp3=$tmpdir/tmp3
tmp4=$tmpdir/tmp4

color="-gofigure"

# Parse args.
while true ; do
    case "$1" in
	-w* )
	color="-white"
	shift
	;;
	-b* )
	color="-black"
	shift
	;;
	-c* )
	shift
	if [ ! ${1-""} ] ; then
	    echo "usage: $0 [-white|-black|-color <colorspec>] <size> [pnmfile]" 1>&2
	    exit 1
	fi
	color="$1"
	shift
	;;
	-* )
	echo "usage: $0 [-white|-black|-color <colorspec>] <size> [pnmfile]" 1>&2
	exit 1
	;;
	* )
	break
	;;
    esac
done

if [ ! ${1-""} ] ; then
    echo "usage: $0 [-white|-black|-color <colorspec>] <size> [pnmfile]" 1>&2
    exit 1
fi
size="$1"
shift

if [ ${2-""} ] ; then
    echo "usage: $0 [-white|-black|-color <colorspec>] <size> [pnmfile]" 1>&2
    exit 1
fi

# Capture input file in a tmp file, in case it's a pipe.
cat $@ > $tmp1

# Construct spacer files.
case "$color" in
    -gofigure )
    pnmcut 0 0 1 1 $tmp1 | pnmtile $size 1 > $tmp2
    ;;
    -white | -black )
    pbmmake $color $size 1 > $tmp2
    ;;
    * )
    ppmmake $color $size 1 > $tmp2
    ;;
esac
pnmflip -rotate90 $tmp2 > $tmp3

# Cat things together.
pnmcat -lr $tmp2 $tmp1 $tmp2 > $tmp4
pnmcat -tb $tmp3 $tmp4 $tmp3

# All done.
if [ -d $tmpdir ]; then
  rm -rf $tmpdir;
fi