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#!/bin/sh
set -e
PROGPATH="$0"
usage() {
cat <<-_EOT
Usage: $PROGPATH <OPTIONS>
Options:
--source PNG source (should be 1024x1024)
--output iconset name, will be created in current directory
_EOT
exit
}
error() {
echo "error: $@" >&2
exit 1
}
SOURCE=
OUTPUT=
while :; do
case $1 in
--source)
if [ -n "$2" ]; then
SOURCE="$2"
shift
else
error "$q requires an argument"
fi
;;
--output)
if [ -n "$2" ]; then
OUTPUT="$2"
shift
else
error "$q requires an argument"
fi
;;
--)
shift
break
;;
-?*)
error "unknown option: %s" "$1"
;;
*)
break
esac
shift
done
[ -z "$SOURCE" ] && usage
[ -z "$OUTPUT" ] && usage
[ ! -f "$SOURCE" ] && error "source file '$SOURCE' does not exists"
mkdir $OUTPUT.iconset || error "failed to create temporary iconset directory"
convert -background none -resize 16x16 -gravity center -extent 16x16 $SOURCE $OUTPUT.iconset/icon_16x16.png
convert -background none -resize 32x32 -gravity center -extent 32x32 $SOURCE $OUTPUT.iconset/icon_16x16@2x.png
convert -background none -resize 32x32 -gravity center -extent 32x32 $SOURCE $OUTPUT.iconset/icon_32x32.png
convert -background none -resize 64x64 -gravity center -extent 64x64 $SOURCE $OUTPUT.iconset/icon_32x32@2x.png
convert -background none -resize 64x64 -gravity center -extent 64x64 $SOURCE $OUTPUT.iconset/icon_64x64.png
convert -background none -resize 128x128 -gravity center -extent 128x128 $SOURCE $OUTPUT.iconset/icon_64x64@2x.png
convert -background none -resize 128x128 -gravity center -extent 128x128 $SOURCE $OUTPUT.iconset/icon_128x128.png
convert -background none -resize 256x256 -gravity center -extent 256x256 $SOURCE $OUTPUT.iconset/icon_128x128@2x.png
convert -background none -resize 256x256 -gravity center -extent 256x256 $SOURCE $OUTPUT.iconset/icon_256x256.png
convert -background none -resize 512x512 -gravity center -extent 512x512 $SOURCE $OUTPUT.iconset/icon_256x256@2x.png
convert -background none -resize 512x512 -gravity center -extent 512x512 $SOURCE $OUTPUT.iconset/icon_512x512.png
convert -background none -resize 1024x1024 -gravity center -extent 1024x1024 $SOURCE $OUTPUT.iconset/icon_512x512@2x.png
iconutil --convert icns $OUTPUT.iconset
rm -R $OUTPUT.iconset
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