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Peter Hutterer 3f5ff113a8 touchpad: only keep low-pressure fingers alive for 2+-slot touchpads 
Regression introduced by 3979b9e16a, bug 105258.
With that commit, we only ended real touches when we had less than nslots fake
fingers down. i.e. tripletap on a 2 slot touchpad would not end the
first/second touch even if the pressure goes below the threshold. e.g. Lenovo
x270 needs this, see https://bugs.freedesktop.org/attachment.cgi?id=137672, it
dips below the pressure threshold for the first slot and ends the second slot
in the same frame as the third finger is detected. Fun times.

Anyway, this breaks semi-mt touchpads, another fine category of devices,
because some of those can detect hovering fingers at low pressure, see bug
105535. Because semi-mt devices are generally garbage, we treat them as
single-touch devices instead. So whenever two fingers are down, we treat both
as above the pressure threshold, even when they're physicall hovering.

Fix this by making the x270 fix conditional on at least 2 slots.

https://bugs.freedesktop.org/show_bug.cgi?id=105535

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
2018-03-21 14:08:06 +10:00
doc meson: point users to disabled documentation when dot/doxygen is missing 2018-03-20 15:32:01 +10:00
include/linux include: sync linux kernel header files with 4.12 2017-09-21 09:07:21 +10:00
src touchpad: only keep low-pressure fingers alive for 2+-slot touchpads 2018-03-21 14:08:06 +10:00
test touchpad: only keep low-pressure fingers alive for 2+-slot touchpads 2018-03-21 14:08:06 +10:00
tools tools: touchpad-pressure: init the lo/hi values correctly 2018-03-20 15:32:01 +10:00
udev udev: add the P50 to the T450 jumping motion quirks 2018-03-20 15:32:01 +10:00
.dir-locals.el indentation: add .dir-locals.el for emacs 2018-02-26 18:44:00 +10:00
.gitignore Drop autotools 2017-07-04 13:44:07 +10:00
.vimdir Add .vimdir for libinput-specific settings 2015-05-25 09:17:29 +10:00
circle.yml circleci: update to use Ubuntu 17.10 2018-01-19 09:24:47 +10:00
CODING_STYLE Add more rules to CODING_STYLE 2015-07-08 09:19:05 +10:00
COPYING COPYING: Update boilerplate from MIT X11 to MIT Expat license 2015-06-16 14:36:04 +10:00
meson.build meson: point users to disabled documentation when dot/doxygen is missing 2018-03-20 15:32:01 +10:00
meson_options.txt Fix meson options default values 2017-10-10 08:21:10 +10:00
README.md doc: more references to libinput-record 2018-03-01 12:19:44 +10:00

README.md

libinput

libinput is a library that handles input devices for display servers and other applications that need to directly deal with input devices.

It provides device detection, device handling, input device event processing and abstraction so minimize the amount of custom input code the user of libinput need to provide the common set of functionality that users expect. Input event processing includes scaling touch coordinates, generating pointer events from touchpads, pointer acceleration, etc.

libinput originates from weston, the Wayland reference compositor.

Architecture

libinput is not used directly by applications, rather it is used by the xf86-input-libinput X.Org driver or wayland compositors. The typical software stack for a system running Wayland is:

@dotfile libinput-stack-wayland.gv

Where the Wayland compositor may be Weston, mutter, KWin, etc. Note that Wayland encourages the use of toolkits, so the Wayland client (your application) does not usually talk directly to the compositor but rather employs a toolkit (e.g. GTK) to do so.

The simplified software stack for a system running X.Org is:

@dotfile libinput-stack-xorg.gv

Again, on a modern system the application does not usually talk directly to the X server using Xlib but rather employs a toolkit to do so.

Source code

The source code of libinput can be found at: http://cgit.freedesktop.org/wayland/libinput

For a list of current and past releases visit: http://www.freedesktop.org/wiki/Software/libinput/

Build instructions: http://wayland.freedesktop.org/libinput/doc/latest/building_libinput.html

Reporting Bugs

Bugs can be filed in the libinput component of Wayland: https://bugs.freedesktop.org/enter_bug.cgi?product=Wayland&component=libinput

Where possible, please provide the libinput record output of the input device and/or the event sequence in question.

See @ref reporting_bugs for more info.

Documentation

Examples of how to use libinput are the debugging tools in the libinput repository. Developers are encouraged to look at those tools for a real-world (yet simple) example on how to use libinput.

License

libinput is licensed under the MIT license.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: [...]

See the COPYING file for the full license information.