Scale and export (SVG, MDPI / non-Retina) app assets

scale

#!/usr/bin/env sh
# vim: set ft=sh

mkdir -p ios
mkdir -p res/drawable-{mdpi,hdpi,xhdpi,xxhdpi,xxxhdpi}

scale () {
  infile=$1
  outfile=${infile%.svg}

  # 2x: iOS non-Retina / Android MDPI
  rsvg-convert "$infile" > "res/drawable-mdpi/${outfile}.png"
  cp "res/drawable-mdpi/${outfile}.png" "ios/${outfile}.png"

  # 3x: Android HDPI (and, downscaled, LDPI)
  rsvg-convert -z 1.5 "$infile" > "res/drawable-hdpi/${outfile}.png"

  # 4x: iOS Retina / Android XHDPI
  rsvg-convert -z 2.0 "$infile" > "res/drawable-xhdpi/${outfile}.png"
  cp "res/drawable-xhdpi/${outfile}.png" "ios/${outfile}@2x.png"

  # 6x: Android XXHDPI
  rsvg-convert -z 3.0 "$infile" > "res/drawable-xxhdpi/${outfile}.png"

  # 8x: Android XXXHDPI
  rsvg-convert -z 4.0 "$infile" > "res/drawable-xxxhdpi/${outfile}.png"
}

if [ $# -gt 0 ]; then
  for infile in "$@"; do
    scale "$infile"
  done
else
  for infile in *.svg; do
    scale "$infile"
  done
fi

rsvg-convert comes from librsvg (brew install librsvg).