Quickly create a 9-patch image suitable as splash screen (Android)

splash9patch

#!/bin/bash

FILE="$1"
OUT=$(echo $FILE|sed -e 's/\./.9./')

$(identify -format "export WIDTH=%w" splash.png)
$(identify -format "export HEIGHT=%h" splash.png)

convert $FILE -bordercolor none -border 1 $OUT

mogrify  -fill black \
    -draw "line 1,0 2,0" \
    -draw "line 0,1 0,2" \
    -draw "line $(($WIDTH-2)),0 $(($WIDTH-1)),0" \
    -draw "line 0,$(($HEIGHT-2)) 0,$(($HEIGHT-1))" \
    -draw "line 1,$(($HEIGHT+1)) $(($WIDTH-1)),$(($HEIGHT+1))" \
    -draw "line $(($WIDTH+1)),1 $(($WIDTH+1)),$(($HEIGHT-1))" \
    $OUT

echo "Written $OUT"