[PATCH inputproto multitouch] State that future touch IDs are indeterminate

Chase Douglas chase.douglas at canonical.com
Mon Dec 12 13:49:42 PST 2011


On 12/12/2011 01:45 PM, Chase Douglas wrote:
> On 12/12/2011 01:40 PM, Peter Hutterer wrote:
>> On Mon, Dec 12, 2011 at 10:56:40AM -0800, Chase Douglas wrote:
>>> This just makes it absolutely clear that clients should not make any
>>> assumptions about future touch ID values.
>>>
>>> I also added "strictly monotonically" increasing to the definition of
>>> touch IDs. It's a more precise definition of the protocol.
>>>
>>> Signed-off-by: Chase Douglas <chase.douglas at canonical.com>
>>> ---
>>>  specs/XI2proto.txt |    8 +++++---
>>>  1 files changed, 5 insertions(+), 3 deletions(-)
>>>
>>> diff --git a/specs/XI2proto.txt b/specs/XI2proto.txt
>>> index ba5f7b7..8e4f948 100644
>>> --- a/specs/XI2proto.txt
>>> +++ b/specs/XI2proto.txt
>>> @@ -2149,9 +2149,11 @@ may not be the logical center of the touch.
>>>  
>>>  Touch tracking IDs are provided in the detail field of touch events. Its
>>>  value is always provided in every touch event. Tracking IDs are
>>> -represented as unsigned 32-bit values and increase in value for each new
>>> -touch, wrapping back to 0 upon reaching the numerical limit of IDs. IDs are
>>> -globally unique.
>>> +represented as unsigned 32-bit values and increase strictly monotonically in
>>> +value for each new touch, wrapping back to 0 upon reaching the numerical limit
>>> +of IDs. The distance between two touch IDs is indeterminate. Clients may not
>>> +assume that any future touches will have specific touch IDs. IDs are globally
>>> +unique.
>>
>> s/distance/increment/ maybe? or whatever the right word is here.
> 
> I like increment. I couldn't think of the right word, and that fits
> better than distance.

Pushed to inputproto branch multitouch-devel.

Thanks!

-- Chase


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