On 03/16/2011 04:41 AM, Benjamin Tissoires wrote: > Hi Armando, > > On 03/14/2011 01:23 PM, Duncan McGreggor wrote: >> On 03/11/2011 03:43 AM, Armando Visconti wrote: >>> All, >>> >>> I see a discussion concerning the MT protocol and Android here: >>> http://groups.google.com/group/android-platform/browse_thread/thread/fc717d35b784afb1 >>> >>> >>> >>> Still not able to understand what protocol Android is currently using >>> for multi-touch > > We try to summarize this on our site: > http://lii-enac.fr/en/architecture/linux-input/multitouch-android-howto.html > > > here is the quote: > ------------------- > Adapt the driver for Android > Android uses a variant of the early Linux kernel multitouch protocol. > You need to adapt your new driver. > modify the _input_mapping function so as to make sure that > ABS_MT_TOUCH_MAJOR is published. You can for instance replace > ABS_MT_TRACKING_ID in 'case HID_DG_CONTACTID'. > modify the _filter_event function so as to make sure that > ABS_MT_TOUCH_MAJOR=1 is emitted when a finger first touches the panel, > and ABS_MT_TOUCH_MAJOR=0 when it is released. The exact code depends on > the driver. > ------------------- > > A cleaner way to explain (without code) is: > > Android detects a multitouch device when ABS_MT_TOUCH_MAJOR and > ABS_MT_TRACKING_ID are present. Then, you can use the protocol A > by reporting contact through ABS_MT_TOUCH_MAJOR. > >>> and if it will be merged with MT Type B protocol or not. >>> I guess they should go for it. > > Currently, developers told us that they won't have the time to do it for > Honeycomb. > > Cheers, > Benjamin
Great info, Benjamin -- thanks so much! d _______________________________________________ Mailing list: https://launchpad.net/~multi-touch-dev Post to : multi-touch-dev@lists.launchpad.net Unsubscribe : https://launchpad.net/~multi-touch-dev More help : https://help.launchpad.net/ListHelp
