#!/bin/sh

# USAGE

# ./convertToIco <input png or ico> <outfilename>.ico
# Example
# ./convertToPng ~/sample.png ~/converted.ico

set -e

IMAGEMAGICK_CONVERT=$(which convert)
IMAGEMAGICK_IDENTIFY=$(which identify)

if [ ! -x "${IMAGEMAGICK_CONVERT}" ]; then
	echo "Cannot find required ImageMagick Convert executable" >&2
	exit 1;
fi
if [ ! -x "${IMAGEMAGICK_IDENTIFY}" ]; then
	echo "Cannot find required ImageMagick Identify executable" >&2
	exit 1;
fi

SOURCE=$1
DEST=$2

if [ -z "${SOURCE}" ]; then
	echo "No source image specified"
	exit 1
fi

if [ -z "${DEST}" ]; then
	echo "No destination specified"
	exit 1
fi

NAME=$(basename "${SOURCE}")
EXT="${NAME##*.}"
BASE="${NAME%.*}"

if [ "${EXT}" == "ico" ]; then
    cp "${SOURCE}" "${DEST}"
    exit 0
fi

convert "${SOURCE}" "${DEST}"