conversion.py

from __future__ import print_function

from os import makedirs, rename, path
from glob import glob

from lxml import etree

import subprocess

sizes = {
    "mdpi": 1.0,
    "hdpi": 1.5,
    "xhdpi": 2.0,
    "xxhdpi": 3.0,
}

inkscape_executable = "inkscape"
imagemagick_executable = "convert"

inkscape_osx = "/Applications/Inkscape.app/Contents/Resources/bin/inkscape"
if path.exists(inkscape_osx):
    inkscape_executable = inkscape_osx

def ensure_output_folder(filename):
    if not path.exists(filename):
        makedirs(filename)

target_folder = path.join("..", "Conversations", "src", "main", "res")

namespace_def = {
    "sodipodi": "http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd",
}

for svg_filename in glob("*.svg"):
    with open(svg_filename, "r") as svg_file:
        svg_data = svg_file.read()

    root = etree.fromstring(svg_data)
    base_width = int(root.get("width"))
    base_height = int(root.get("height"))

    guides = root.findall(".//sodipodi:guide", namespaces=namespace_def)

    for size, scale in sizes.items():
        width = base_width * scale
        height = base_height * scale

        output_folder = path.join(target_folder, "drawable-%s" % size)
        png_filename = svg_filename.replace(".svg", ".9.png")
        output_filename = path.join(output_folder, png_filename)
        ensure_output_folder(output_folder)

        subprocess.call([
            inkscape_executable,
            "-z", "-C", "-d", str(90 * scale),
            "-f", svg_filename,
            "-e", output_filename,
        ])

        subprocess.call([
            imagemagick_executable,
            output_filename,
            "-matte", "-bordercolor", "none", "-border", "1",
            output_filename,
        ])

        top = []
        right = []
        bottom = []
        left = []

        for guide in guides:
            orientation = guide.get("orientation")
            x, y = guide.get("position").split(",")
            x, y = int(x), int(y)

            if orientation == "1,0" and y == base_height:
                top.append(x * scale)

            if orientation == "0,1" and x == base_width:
                right.append((base_height - y) * scale)

            if orientation == "1,0" and y == 0:
                bottom.append(x * scale)

            if orientation == "0,1" and x == 0:
                left.append((base_height - y) * scale)

        top_line = ["-draw", 'rectangle %d,%d %d,%d' % (min(top) + 1, 0, max(top), 0)]
        right_line = ["-draw", 'rectangle %d,%d %d,%d' % (width + 1, min(right) + 1, width + 1, max(right))]
        bottom_line = ["-draw", 'rectangle %d,%d %d,%d' % (min(bottom) + 1, height + 1, max(bottom), height + 1)]
        left_line = ["-draw", 'rectangle %d,%d %d,%d' % (0, min(left) + 1, 0, max(left))]

        subprocess.call([
            imagemagick_executable,
            output_filename,
            "-fill", "black", "-stroke", "none",
        ] + top_line + right_line + bottom_line + left_line + [
            output_filename,
        ])

conversion.sh

#!/bin/sh

alias inkscape="/Applications/Inkscape.app/Contents/Resources/bin/inkscape"

# mdpi    1.0   90
# hdpi    1.5   135
# xhdpi   2.0   180
# xxhdpi  3.0   270

mkdir drawable-mdpi/

inkscape -z -C -d 90 -f message_bubble_received.svg \
	-e drawable-mdpi/message_bubble_received.png
convert drawable-mdpi/message_bubble_received.png \
	-matte -bordercolor none -border 1 \
	drawable-mdpi/message_bubble_received.png
convert drawable-mdpi/message_bubble_received.png \
	-fill black -stroke none \
	-draw "rectangle 21,0 24,0" \
	-draw "rectangle 37,9 37,20" \
	-draw "rectangle 21,29 24,29" \
	-draw "rectangle 0,13 0,16" \
	drawable-mdpi/message_bubble_received.png
cp drawable-mdpi/message_bubble_received.png \
	../Conversations/src/main/res/drawable-mdpi/message_bubble_received.9.png

inkscape -z -C -d 90 -f message_bubble_sent.svg \
	-e drawable-mdpi/message_bubble_sent.png
convert drawable-mdpi/message_bubble_sent.png \
	-matte -bordercolor none -border 1 \
	drawable-mdpi/message_bubble_sent.png
convert drawable-mdpi/message_bubble_sent.png \
	-fill black -stroke none \
	-draw "rectangle 13,0 16,0" \
	-draw "rectangle 37,9 37,20" \
	-draw "rectangle 13,29 16,29" \
	-draw "rectangle 0,13 0,16" \
	drawable-mdpi/message_bubble_sent.png
cp drawable-mdpi/message_bubble_sent.png \
	../Conversations/src/main/res/drawable-mdpi/message_bubble_sent.9.png

mkdir drawable-hdpi/

inkscape -z -C -d 135 -f message_bubble_received.svg \
	-e drawable-hdpi/message_bubble_received.png
convert drawable-hdpi/message_bubble_received.png \
	-matte -bordercolor none -border 1 \
	drawable-hdpi/message_bubble_received.png
convert drawable-hdpi/message_bubble_received.png \
	-fill black -stroke none \
	-draw "rectangle 31,0 36,0" \
	-draw "rectangle 55,13 55,30" \
	-draw "rectangle 31,43 36,43" \
	-draw "rectangle 0,19 0,24" \
	drawable-hdpi/message_bubble_received.png
cp drawable-hdpi/message_bubble_received.png \
	../Conversations/src/main/res/drawable-hdpi/message_bubble_received.9.png

inkscape -z -C -d 135 -f message_bubble_sent.svg \
	-e drawable-hdpi/message_bubble_sent.png
convert drawable-hdpi/message_bubble_sent.png \
	-matte -bordercolor none -border 1 \
	drawable-hdpi/message_bubble_sent.png
convert drawable-hdpi/message_bubble_sent.png \
	-fill black -stroke none \
	-draw "rectangle 19,0 24,0" \
	-draw "rectangle 55,13 55,30" \
	-draw "rectangle 19,43 24,43" \
	-draw "rectangle 0,19 0,24" \
	drawable-hdpi/message_bubble_sent.png
cp drawable-hdpi/message_bubble_sent.png \
	../Conversations/src/main/res/drawable-hdpi/message_bubble_sent.9.png

mkdir drawable-xhdpi/

inkscape -z -C -d 180 -f message_bubble_received.svg \
	-e drawable-xhdpi/message_bubble_received.png
convert drawable-xhdpi/message_bubble_received.png \
	-matte -bordercolor none -border 1 \
	drawable-xhdpi/message_bubble_received.png
convert drawable-xhdpi/message_bubble_received.png \
	-fill black -stroke none \
	-draw "rectangle 41,0 48,0" \
	-draw "rectangle 73,17 73,40" \
	-draw "rectangle 41,57 48,57" \
	-draw "rectangle 0,25 0,32" \
	drawable-xhdpi/message_bubble_received.png
cp drawable-xhdpi/message_bubble_received.png \
	../Conversations/src/main/res/drawable-xhdpi/message_bubble_received.9.png

inkscape -z -C -d 180 -f message_bubble_sent.svg \
	-e drawable-xhdpi/message_bubble_sent.png
convert drawable-xhdpi/message_bubble_sent.png \
	-matte -bordercolor none -border 1 \
	drawable-xhdpi/message_bubble_sent.png
convert drawable-xhdpi/message_bubble_sent.png \
	-fill black -stroke none \
	-draw "rectangle 25,0 32,0" \
	-draw "rectangle 73,17 73,40" \
	-draw "rectangle 25,57 32,57" \
	-draw "rectangle 0,25 0,32" \
	drawable-xhdpi/message_bubble_sent.png
cp drawable-xhdpi/message_bubble_sent.png \
	../Conversations/src/main/res/drawable-xhdpi/message_bubble_sent.9.png

mkdir drawable-xxhdpi/

inkscape -z -C -d 270 -f message_bubble_received.svg \
	-e drawable-xxhdpi/message_bubble_received.png
convert drawable-xxhdpi/message_bubble_received.png \
	-matte -bordercolor none -border 1 \
	drawable-xxhdpi/message_bubble_received.png
convert drawable-xxhdpi/message_bubble_received.png \
	-fill black -stroke none \
	-draw "rectangle 61,0 72,0" \
	-draw "rectangle 109,25 109,60" \
	-draw "rectangle 61,85 72,85" \
	-draw "rectangle 0,37 0,48" \
	drawable-xxhdpi/message_bubble_received.png
cp drawable-xxhdpi/message_bubble_received.png \
	../Conversations/src/main/res/drawable-xxhdpi/message_bubble_received.9.png

inkscape -z -C -d 270 -f message_bubble_sent.svg \
	-e drawable-xxhdpi/message_bubble_sent.png
convert drawable-xxhdpi/message_bubble_sent.png \
	-matte -bordercolor none -border 1 \
	drawable-xxhdpi/message_bubble_sent.png
convert drawable-xxhdpi/message_bubble_sent.png \
	-fill black -stroke none \
	-draw "rectangle 37,0 48,0" \
	-draw "rectangle 109,25 109,60" \
	-draw "rectangle 37,85 48,85" \
	-draw "rectangle 0,37 0,48" \
	drawable-xxhdpi/message_bubble_sent.png
cp drawable-xxhdpi/message_bubble_sent.png \
	../Conversations/src/main/res/drawable-xxhdpi/message_bubble_sent.9.png