[Multi-touch-dev] [RFC XI 2.1] current issues

Henrik Rydberg rydberg at euromail.se
Tue Dec 7 13:44:39 PST 2010

Hi Denis,

> I guess different kernel driver for different device _will_ give you

> different data. Hence my question was in context of recent discussion
> - getting events through slave devices vs. master devices - I would
> expect the data to be "unified" so that clients won't need to have
> device-specific workarounds. I wouldn't be surprised if some
> parameters would need to be configurable - the only example that comes
> to my mind right now is again width/height of the touch - right now I
> do not know what the value means and just assume that value 255 (the
> maximum for magic trackpad) means 50 pixels wide.

The min/max of the major/minor (aka width/height) is actually not that important
- they are all calibrated in devices coordinates, so using the same scale for
all of x/y/major/minor gives you the best result.


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