set -e
read filename

if [ "${filename%%:*}" = xdgicon ]; then
    # get biggest icon from hicolor theme

    filename="${filename#*:}.png"
    candidate=
    for dir in /usr/share/icons/hicolor/ /usr/share/icons/; do
        candidate=$(find -L "${dir}" -type f -name "${filename}")
        if [ -n "${candidate}" ]; then
            candidate=$(echo "${candidate}" | xargs ls --sort=size | head -1)
            break
        fi
    done

    [ -n "${candidate}" ]
    filename="${candidate}"

elif [ "${filename}" = "-" ] || [ "${filename##*:}" = "-" ]; then
    tmpfile="$(mktemp /tmp/qimg-XXXXXXXX)"
    cat > "${tmpfile}"
    if [ "${filename##*:}" = "-" ]; then
        tmpfile="${filename%:*}:${tmpfile}"
    fi
    filename="${tmpfile}"

elif ! [ -r "${filename}" ]; then
    exit 1
fi

# identify in F18 (6.7) adds implicit '\n' to format,
# whereas identify in F20 (6.8) does not
identify -format '%w %h\n' "$filename" | sed -e '/^$/d'
convert -depth 8 "$filename" rgba:-

[ -n "${tmpfile}" ] && rm -f ${tmpfile} || true

# vim: ft=sh ts=4 sw=4 et
