From: Henrik Rydberg <rydberg@euromail.se>
To: Joon Young Shim <dofmind@gmail.com>
Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 6/6] input: Add a detailed multi-touch finger data report protocol (rev2)
Date: Fri, 30 Jan 2009 14:10:17 +0100 [thread overview]
Message-ID: <4982FC39.7080308@euromail.se> (raw)
In-Reply-To: <4e1455be0901292210t793c942cg5776079ecc99080e@mail.gmail.com>
Joon Young Shim wrote:
> 2009/1/28 Henrik Rydberg <rydberg@euromail.se>:
[snip]
>
> Hi Henrik,
>
> Sorry for multiple posts.
>
> I want to know how calculates touch coordinates at user space using a
> set of ABS_MT.
> If i do dual touch, can i get correct two coordinates through ABS_MT report?
The coordinates for the two fingers are sent from the driver in sequence
as two separate finger packets. What then happens with it depends on the
kind of application. For normal desktop usage, the packets are read from
the input device by the multitouch X driver (a modified version of the
synaptics driver), which does finger matching and transforms the
messages into gestures, reported as X events. It is of course also
possible to read the input device directly. It goes without saying that
further development is needed before the multitouch X driver hits the
repos, but none of this can really become reality without basic support
in the kernel.
Henrik
next prev parent reply other threads:[~2009-01-30 13:10 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-28 10:23 [PATCH 0/6] input: resend of pending patches Henrik Rydberg
2009-01-28 10:23 ` [PATCH 1/6] input: bcm5974: Prepare for a new trackpad header type Henrik Rydberg
2009-01-28 10:23 ` [PATCH 2/6] input: bcm5974: Add quad-finger tapping Henrik Rydberg
2009-01-28 10:23 ` [PATCH 3/6] input: bcm5974: Add support for the Macbook 5 (Unibody) Henrik Rydberg
2009-01-28 10:23 ` [PATCH 4/6] input: bcm5974: Augmented debug information Henrik Rydberg
2009-01-28 10:23 ` [PATCH 5/6] input: Allow certain EV_ABS events to bypass all filtering Henrik Rydberg
2009-01-28 10:23 ` [PATCH 6/6] input: Add a detailed multi-touch finger data report protocol (rev2) Henrik Rydberg
2009-01-30 5:54 ` Joon Young Shim
2009-01-30 6:10 ` Joon Young Shim
2009-01-30 13:10 ` Henrik Rydberg [this message]
2009-01-29 8:29 ` [PATCH 5/6] input: Allow certain EV_ABS events to bypass all filtering Andrew Morton
2009-01-29 8:33 ` [PATCH 1/6] input: bcm5974: Prepare for a new trackpad header type Andrew Morton
2009-01-29 22:30 ` Henrik Rydberg
-- strict thread matches above, loose matches on Subject: below --
2009-04-27 22:50 [PATCH 6/6] input: Add a detailed multi-touch finger data report protocol (rev2) Dmitry Torokhov
2009-04-28 8:00 ` Henrik Rydberg
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