gen-icons.sh

#!/bin/sh

[ $1 ] || echo "tell me the input icon image file"

[ $1 ] || exit 1

[ -f $1 ] || echo "input [$1] is not there"

[ -f $1 ] || exit 1

echo "resizing [$1] to generate ios and android icons"

# android icons
for i in \
"-resize 36x36 android/icon_ldpi.png" \
"-resize 48x48 android/icon_mdpi.png" \
"-resize 72x72 android/icon_hdpi.png" \
"-resize 96x96 android/icon_xhdpi.png"
do
  echo "$1 $i"
  convert $1 $i
done

# ios icons
for i in \
"-resize 180x180 ios/icon-60@3x.png"  \
"-resize 60x60 ios/icon-60.png"       \
"-resize 120x120 ios/icon-60@2x.png"  \
"-resize 76x76 ios/icon-76.png"       \
"-resize 152x152 ios/icon-76@2x.png"  \
"-resize 40x40 ios/icon-40.png"       \
"-resize 80x80 ios/icon-40@2x.png"    \
"-resize 57x57 ios/icon.png"          \
"-resize 114x114 ios/icon@2x.png"     \
"-resize 72x72 ios/icon-72.png"       \
"-resize 144x144 ios/icon-72@2x.png"  \
"-resize 29x29 ios/icon-small.png"    \
"-resize 58x58 ios/icon-small@2x.png" \
"-resize 50x50 ios/icon-50.png"       \
"-resize 100x100 ios/icon-50@2x.png"
do
  echo "$1 $i"
  convert $1 $i
done