norm-image

#!/bin/sh

# BSD 3-Clause License

# Copyright (c) 2017,2018,2019,2020 Maxim Konakov
# All rights reserved.

# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:

# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.

# * Redistributions in binary form must reproduce the above copyright notice,
#   this list of conditions and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.

# * Neither the name of the copyright holder nor the names of its
#   contributors may be used to endorse or promote products derived from
#   this software without specific prior written permission.

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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VER="v0.8.3"

usage() {
	cat >&2 <<-EOF
	Usage:	$(basename "$0") INPUT-FILE OUTPUT-FILE
	Crop image to content, and then add white border 5% thick.
	Version: $VER
	EOF

	exit 1
}

die() {
	echo >&2 "$0: $*"
	exit 1
}

# check parameters
[ $# -gt 0 ] || usage

IN="$1"
[ -n "$IN" ] || die "input file is not specified"

OUT="$2"
[ -n "$OUT" ] || die "output file is not specified"

# normalise
exec convert "$IN" -fuzz '2%' -trim -bordercolor white -border '5%x5%' +repage "$OUT"