All touchpad recordings seen so far show that a value above 100 is definitely
a thumb or a palm. Values below are harder to discern, and the same isn't true
for touchpads supporting ABS_PRESSURE instead of ABS_MT_PRESSURE.
The handling of a touch is as outlined in tp_thumb_detect:
* thumbs are ignored for pointer motion
* thumbs cancel gestures
* thumbs are ignored for clickfinger count
* edge scrolling doesn't care either way
* software buttons don't care either way
* tap: only if thumb on begin
The handling of thumbs while tapping is the simplest approach only, more to
come in follow-up patches.
Note that "thumb" is the synonym for "this touch is too big to be a
fingertip". Which means that a light thumb touch will still be counted as a
finger. The side-effect here is that thumbs resting a the bottom edge of the
touchpad will almost certainly not trigger the pressure threshold because
most of the thumb is off the touchpad.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Implement touchpad pinch (and rotate) gesture support.
Note that two two-finger scrolling tests are slightly tweaked to assure that
there is enough touch movement to allow the scroll-or-pinch detect code to do
its work.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Jason Gerecke <jason.gerecke@wacom.com>
Add support for swipe gestures.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Acked-by: Jason Gerecke <jason.gerecke@wacom.com>
This simply doesn't work for low-dpi mice. Normalizing a 400dpi mouse to a
1000dpi mouse forces a minimum movement of 2.5 units and the resulting pixel
jumps. It is impossible for the caller to detect whether the jump was caused
by a single motion or multiple motion events.
This is technically an API break, but not really.
The accelerated data was already relatively meaningless, even if normalized as
the data did not correspond predictably to any input motion (unless you know
the implementation acceleration function in the caller). So we can drop the
mention from there without expecting any ill effects in the caller.
The unaccelerated data was useless for low-dpi mice and could only be used to
measure the physical distance of the mouse movement - something not used in
any caller we're aware of (if needed, we can add that functionality as a
separate call). Dropping motion normalization for unaccelerated deltas also
restores true dpi capabilities to users of that API, mostly games that want to
make use of high-dpi mice.
This is a simplified patch, the normalization is still in place for most of
libinput, it merely carries the original coordinates in the event itself.
In the case of touchpads, the coordinates are unnormalized into the x-axis
coordinate space as per the documentation.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
To quote Bryce Harrington from [1]:
"MIT has released software under several slightly different licenses,
including the old 'X11 License' or 'MIT License'. Some code under this
license was in fact included in X.org's Xserver in the past. However,
X.org now prefers the MIT Expat License as the standard (which,
confusingly, is also referred to as the 'MIT License'). See
http://cgit.freedesktop.org/xorg/xserver/tree/COPYING
When Wayland started, it was Kristian Høgsberg's intent to license it
compatibly with X.org. "I wanted Wayland to be usable (license-wise)
whereever X was usable." But, the text of the older X11 License was
taken for Wayland, rather than X11's current standard. This patch
corrects this by swapping in the intended text."
libinput is a fork of weston and thus inherited the original license intent
and the license boilerplate itself.
See this thread on wayland-devel here for a discussion:
http://lists.freedesktop.org/archives/wayland-devel/2015-May/022301.html
[1] http://lists.freedesktop.org/archives/wayland-devel/2015-June/022552.html
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Acked-by: Jonas Ådahl <jadahl@gmail.com>
Some semi-mt model touchpads have a better accuracy for slot 0 then for
slot 1 (they only have 2), so on semi-mt models only use the movement of
the touch in slot 0 for 2fg scrolling, rather then the average movement of
the 2 touches.
This fixes 2fg scrolling being choppy / jumpy in some cases.
BugLink: https://bugs.freedesktop.org/show_bug.cgi?id=89683
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Also needed: change the touchpad scroll source test to use more separate
events. The current litest semi-mt touch implementation only moves the first
touch on every second move. With 5 movements this isn't enough to fill the
motion history and generate events, so double it to 10 so we're guaranteed to
get scroll events.
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Less ambiguous since real_touches can be interpreted to "current number of
real touches as opposed to fake touches". Which it isn't, this variable holds
the number of slots.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Change tp_filter_motion to use normalized_coords, rather then having it take
separate x and y values.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Add a normalized_is_zero helper function, and use it where applicable.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
The two tp_get_*_touches_delta functions are almost identical, refactor
them into one function.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Only look at real touches when getting the average touches delta, otherwise
the touch used to populate the fake touches gets an unfair weighing factor.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Just moving some code around, no functional changes.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Handle everything which is not handled by the tap, (soft)button or edge-scroll
code/statemachines in a unified way. Everything is treated as a X-finger
gesture now, and the action to take on finger movement is decided by
the gesture.finger_count setting. Pointer control now simply is seen as a
1 finger gesture, and 2fg scrolling as a 2fg gesture.
This removed the need for special-casing things like switching back to
pointer mode when lifting a finger in 2fg scrolling mode, and also lays the
groundwork for adding 3+ fg gesture support.
Note that 1 test-case needs to be updated to wait for the finger mode
switching when switching mode while a gesture has already been started.
This is actually an improvement as this stops sending spurious pointer
motion events at the end of 2fg scrolling when not lifting both fingers at
exactly the same time.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
