A mix of both. MacOS's multitouch privateframework has a number of states to cover when a finger is just landing, ellipsoid data, palm rejection / resting thumb

A mix of both. MacOS's multitouch privateframework has a number of states to cover when a finger is just landing, ellipsoid data, palm rejection / resting thumb states. The ability to provide this data is presumably done by their touch hardware. I encourage looking at the earlier discussions since much has been talked about this before.