On Wed, May 19, 2010 at 5:26 PM, Rafi Rubin <rafi@xxxxxxxxxxxxxx> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 05/19/10 20:13, Ping Cheng wrote: >> On Wed, May 19, 2010 at 4:34 PM, Rafi Rubin <rafi@xxxxxxxxxxxxxx> wrote: >>> My understanding is that it would be more like >>> + SYN_MT_SLOT 0 >>> + ABS_MT_POSITION_X x >>> + ABS_MT_POSITION_Y y >>> + SYN_REPORT >>> + SYN_MT_SLOT 0 >>> + ABS_MT_POSITION_X x >>> + ABS_MT_POSITION_Y y >>> + SYN_REPORT >>> + SYN_MT_SLOT 0 >>> + ABS_MT_POSITION_X x >>> + ABS_MT_POSITION_Y y >>> + SYN_MT_SLOT 1 >>> + ABS_MT_POSITION_X x >>> + ABS_MT_POSITION_Y y >>> + SYN_REPORT >> >> You are right if one slot only has or is only allowed to have one >> point. My scenario is that one slot can have more than one point. >> Basically, my intention is to utilize the MT_SLOT and MT_TRACKING_ID >> in such a way that it avoids as much overlap as possible. >> >> And hopefully it makes sesne in the reality too. > > Please clarify by what you mean by more than one point. I might have been confused myself by ABS_MT_BLOB_ID and SYN_MT_SLOT here. What I meant by "more than one point" is a contact (or touch, I am not sure which one is the right term :) is represented by a few (x,y) coordinates. Maybe we should use SYN_MT_SLOT for my case? > I may be misunderstanding, but I thought that these slots are basically a > superior replacement to tracking id. > > one finger -> one slot This is what I needed to understand. Is slot for one (x,y) only or can it also be used for more than one set of (x,y)? > But with slots we can use the filtering that input provides, which we've been > by-passing with the existing MT protocol (at least that's what I think Henrik's > goal is). Good to know that filtering has already been considered. I know I must be out of sync with Henrik's goal. That's why I wanted to show my ignorance :). Ping -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
