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From: Joonyoung Shim <jy0922.shim@samsung.com>
To: linux-input@vger.kernel.org
Cc: rydberg@euromail.se, dmitry.torokhov@gmail.com, jkosina@suse.cz
Subject: Questions about Multi-touch Protocal
Date: Tue, 05 Jan 2010 15:18:00 +0900	[thread overview]
Message-ID: <4B42D998.4050303@samsung.com> (raw)

Hi, all.

I have some questions about Multi-touch(MT) Protocal.

First, what is the purpose of ABS_MT_TOUCH_MAJOR event? I wonder how
it is used at userspace side.

Should the ABS_MT_TOUCH_MAJOR be the mininum set of events for multi
touch? I'm not sure whether this question is valid because of first
question.

Finally, what is difference of ABS_MT_TOUCH_MAJOR and
ABS_MT_WIDTH_MAJOR?

I read the MT Protocol document of kernel, but i cannot understand above
things clearly.

Thanks.

             reply	other threads:[~2010-01-05  6:18 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-01-05  6:18 Joonyoung Shim [this message]
2010-01-05 12:08 ` Questions about Multi-touch Protocal Henrik Rydberg
2010-01-05 12:42   ` Florian Echtler
2010-01-05 12:55     ` Henrik Rydberg
2010-01-05 17:49   ` Dmitry Torokhov
2010-01-06  0:49   ` Joonyoung Shim
2010-01-13 20:21     ` Henrik Rydberg
2010-01-13 22:25     ` Peter Hutterer
2010-01-14  0:35       ` Henrik Rydberg

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