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Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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Add filtering also to touch/width events, but be careful to treat a zero
touch exactly as zero.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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The fingers going away are important in the matching algorithm,
to correctly detect new fingers when placed close to a finger
in the process of leaving the surface. However, once a no-touch
has been confirmed, the tracking id should not be reused, should
a new finger appear close to the removal point.
This patch clears the tracking id of all removed or no-touch state
fingers, thereby reducing accidental jumps on touch to a minimum.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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The kernel filtering is bypassed for MT events. This patch reintroduces
filtering at the earliest possible point, right after the fingers have
been identified. For drivers that do not set proper fuzz parameters,
sensible values are derived based on a generic signal-to-noise ratio.
The defuzz code is borrowed from the Linux kernel, thanks GPL.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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The fingers are currently sorted in tracking id order, for no
good reason. This patch removes the sorting.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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The HWState keeps, for good reason, both touching fingers and fingers
going away. However, this implies that additional logic is needed to
keep track of the number of actual touching fingers. In particular
the test for touching fingers is somewhat misplaced in hwstate.c.
Moreover, HWState should only exist in one instance, since it contains
data which does not need to be referred to during gesture extraction.
This patch introduces the MTState structure, which keeps more digested
data for gesture extraction. In particular, it only keeps the actual
touches.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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Rename the hardware state struct State to HWState, to make
room for additional state structures.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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