Shell script that transforms a svg file in png resource files for an android project. It uses inkscape as a tool to export to png

svg2android.sh

#!/bin/sh

if [ $# -eq 0 ]; then
	echo "svg2android.sh [INPUT] [PROJECT_DIR] [OUTPUT_NAME] [SIZE_DP]"
	exit
fi

INPUT=$1
PROJECT=$2
NAME="ic_launcher"
DP=48
if [ $# -eq 4 ]; then
	DP=$4
	NAME=$3
fi
MAIN="${PROJECT}/src/main/"
RES="${MAIN}res/"
DRAWABLE="${RES}drawable"


echo "DP    = $DP"

PX_MDP=$(expr $DP \* 1) 
PX_HDP=$(expr $DP \* 3 / 2)  # *1.5 rounded to the lowest
PX_XHDP=$(expr $DP \* 2) 
PX_XXHDP=$(expr $DP \* 3)
PX_XXXHDP=$(expr $DP \* 4) 

echo "HDP   = $PX_HDP"
echo "XHDP  = $PX_XHDP"
echo "XXHDP = $PX_XXHDP"

inkscape --export-png "${DRAWABLE}-mdpi/${NAME}.png"    -w $PX_MDP    "${INPUT}"
inkscape --export-png "${DRAWABLE}-hdpi/${NAME}.png"    -w $PX_HDP    "${INPUT}"
inkscape --export-png "${DRAWABLE}-xhdpi/${NAME}.png"   -w $PX_XHDP   "${INPUT}"
inkscape --export-png "${DRAWABLE}-xxhdpi/${NAME}.png"  -w $PX_XXHDP  "${INPUT}"
if [ $# -ne 4 ]; then
	inkscape --export-png "${DRAWABLE}-xxxhdpi/${NAME}.png" -w $PX_XXXHDP "${INPUT}"
	inkscape --export-png "${MAIN}${NAME}-web.png"          -w 512        "${INPUT}"
fi