#!/bin/sh
# altblue 2000

WT=200
HT=200
OUT=cover.jpg
ENC=jpeg

muci=$(/usr/bin/getopt 'o:w:h:e:' "$@")

eval set -- "$muci"

while true ; do
    case "$1" in
        -w) WT=$2 ; shift 2 ;;
        -h) HT=$2 ; shift 2 ;;
        -o) OUT=$2; shift 2 ;;
        -e) ENC=$2; shift 2 ;;
        --) shift ; break ;;
        *) echo "internal parsing error" >&2 ; exit 1 ;;
    esac
done

file="$@"


echo "Converting '$file' to '$OUT' (max width: $WT, max height: $HT)"

wt=$(identify -format "%w" "$file")
ht=$(identify -format "%h" "$file")
echo "ORIGINAL GEOMETRY: $wt x $ht"

if [ $wt -ge $ht ]
then
	ht=$(echo "scale=4; ${WT}*${ht}/${wt}"|bc -l |sed -e 's/\..\+$//')
	wt=${WT}
else
	wt=$(echo "scale=4; ${HT}*${wt}/${ht}"|bc -l |sed -e 's/\..\+$//')
	ht=${HT}
fi

echo "  SCALED GEOMETRY: $wt x $ht"


convert -size "${wt}x${ht}" "$file" -resize "${wt}x${ht}!" +profile '*' $ENC:"$OUT"