Re: [PATCH] input: mt: Add an envelope tool type

[Henrik Rydberg <rydberg@euromail.se>]

On 12/09/2010 02:17 AM, Dmitry Torokhov wrote:

> On Thu, Dec 09, 2010 at 02:12:08AM +0100, Henrik Rydberg wrote:
>>>>>
>>
>>>>> 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.
> 
> Even ones that fully support independent finger tracking?
> 


No, sorry, that should read "all drivers in that list". The ones that can detect
individual fingers in space are fine as they are.