set -e
read filename

if [[ "${filename}" = xdgicon:* ]]; then
    # get biggest icon from hicolor theme
    candidate=$(find /usr/share/icons/hicolor -type f -name "${filename#*:}.png" | xargs ls --sort=size | head -1)

    if [[ ! "$(basename "${candidate}")" = "${filename#*:}.png" ]]; then
        # file not found, ls returned garbage
        exit 1
    fi
    filename="${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 -format '%w %h' "$filename"
convert -depth 8 "$filename" rgba:-

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

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