I would like to access the raw data from my touchpad before the data is processed into a single X,Y coordinate. Instead, I would like a grid of values as portrayed here:
(image from howstuffworks.com/iphone3.htm)
I don't think this is possible with my touchpad (info below). However, if anyone has had any luck accomplishing this with a different touchpad model, or even touchscreen on any other device, I would like to know the model and how. And if anyone disagrees and knows how to do this on my model, even better!
My laptop uses a Synaptics PS/2 touchpad with hardware ID ACPI\SYN070B.
Looking at a diagram on page 17 of the Synaptics API manual for a PS/2 touchpad, it seems the processing occurs within the touchpad, and only a single point is sent to the driver, so I don't think it is possible for my touchpad.