Script for generating image assets of different DPIs for Android from SVG source file, using Inkscape.

dpigen.sh

#!/bin/bash
#
# dpigen.sh: Script for generating image assets of different DPIs for Android from SVG source file, using Inkscape.
#
# Copyright (c) 2014 Zhang Hai <[email protected]>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see
# <http://www.gnu.org/licenses/>.
#

MDPI_SIZE="48"
HDPI_SIZE="72"
XHDPI_SIZE="96"
XXHDPI_SIZE="144"
XXXHDPI_SIZE="192"

MDPI_DIR="drawable-mdpi"
HDPI_DIR="drawable-hdpi"
XHDPI_DIR="drawable-xhdpi"
XXHDPI_DIR="drawable-xxhdpi"
XXXHDPI_DIR="drawable-xxxhdpi"

name=$(basename "$0")
raw=
out=

usage() {
    cat <<EOF
Usage: ${name} [OPTIONS]
EOF
}

dpigen() {
    mkdir -p "./$1"
    inkscape --export-png="./$1/${out}" --export-width="$2" --export-height="$2" "${raw}"
}

main () {

    if [[ "$#" -ne 1 ]]; then
        usage
        exit 1
    fi
    raw="$1"
    out="$(basename -s.svg ${raw}).png"

    dpigen "${MDPI_DIR}" "${MDPI_SIZE}"
    dpigen "${HDPI_DIR}" "${HDPI_SIZE}"
    dpigen "${XHDPI_DIR}" "${XHDPI_SIZE}"
    dpigen "${XXHDPI_DIR}" "${XXHDPI_SIZE}"
    dpigen "${XXXHDPI_DIR}" "${XXXHDPI_SIZE}"
}

main "$@"