This tool applies the following optimizations, designed to reduce the runtime memory footprint of a WatchFace Format watch face:

1. Crops and resizes BitmapFonts, adding margins to the Character tag to ensure alignment.

2. Crops and resizes PartImage nodes, adjusting the pivot if needed.

3. Attempts to quantize images to RGB565 where there will be no noticeable loss of fidelity.

4. De-duplicates image resources after cropping, etc...

./gradlew :wff-optimizer:jar

The following command will run the optimizations in place:

java -jar wff_optimizer.jar --source PATH/TO/UNZIPPED/APK

Add --verbose to observe what the tool is doing.