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SubjectRe: [PATCH] input: mt: Add an envelope tool type
>>>

>>> Is it assumed that the envelop has only two touches comprising it? Or is
>>> it any number of touches? If it's any number of touches, how does one
>>> know how many touches it is?
>>
>> Those are good questions. Specifying how many touches are in the
>> envelop makes sense. It also covers rectangle as a special case of
>> envelop.
>
> I have a feeling that trying to accomodate non-rectangular, more than 2
> point shapes without using native MT data is over-engineering the
> problem... Do we have examples other than older generation Elantechs and
> Synaptics that need envelope notion?
>


Those are the ones targeted so far. Maybe appletouch could be added to the list
as well. I imagine all drivers will end up using zero, one and two envelope points.

Henrik


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