detect_pressure_offset() currently rejects offsets that are greater than
20%. My graphics tablet (Wacom Bamboo Fun) is about 30%. The pen tip is
2 mm. Wacom recommends replacing at 1 mm, which means this isn't worn
out yet and we should instead increase the limit to make these devices
usable.
Without this change a "pen down" event happens simultaneously with the
pen being detected -- about 1 cm above the surface -- and producing
libinput pressure of about 0.30. This means you start drawing "in the
air", without knowing up front where the cursor is going to be.
Signed-off-by: Bjørn Forsman <bjorn.forsman@gmail.com>
Previously we only applied pressure offset handling for tablets that
supported ABS_DISTANCE. Detecting a pressure offset when the tool
doesn't actually touch the surface is easy after all.
But tablets without distance handling may also have a pressure offset,
so let's try to detect this. This is obviously harder since the pen will
always touch the tablet's surface whenever it is in proximity and thus
will always have *some* pressure applied to it.
The process here is to merely observe the minimum pressure value during
the first two strokes of the pen. On the third prox in, that minimum
pressure value is taken as the offset. If the pressure drops below the
offset, the offset is adjusted downwards [1] so over time we'll
get closer to the pen's real offset.
[1] this is already done for distance tablets too
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
detect_pressure_offset() would previously update an existing offset but
otherwise skip most of the work for any event other than proximity-in
events. This was too hidden, let's split this into two functions - one
to update an existing offset and another one to detect a new offset.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Right now for touch arbitration to work, we require the device group to
be the same (i.e. they're hanging off the same physical bus). That's not
always the case and statistically we have a lot more devices that have
a built-in tablet + touchscreen than we have Intuos-like external
tablets.
So let's default to the more common case - enabling arbitration with the
first touchscreen/external touchpad we find. If a subsequent device is
"better", swap it out. Right now, the only heuristic we have here is the
device group check but in the future we could get more precise.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Previously the arbitration rectangle would be moved to lie completely in
the first quadrant of the coordinate system.
Signed-off-by: hrdl <51402-hrdl@users.noreply.gitlab.freedesktop.org>
A user was experiencing issues with their hand being recognized as
touch input above the stylus tip.
Since touch above the stylus should be rare, increase the touch
arbitration rectangle height by 50mm.
Fix: https://gitlab.freedesktop.org/libinput/libinput/-/issues/809
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Fix the warning generated:
[82/243] Compiling C object libinput.so.10.13.0.p/src_evdev-tablet.c.o
../src/evdev-tablet.c:938:1: warning: unused function
'tool_set_bits_from_libwacom' [-Wunused-function]
tool_set_bits_from_libwacom(const struct tablet_dispatch *tablet,
^
When building with Clang v15 and without libwacom:
$ CC=clang CXX=clang++ meson builddir -Dlibwacom=false
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Commit 806d4a1393 ("tablet: check libevdev_get_abs_info() return
value") prevented a crash when tilt was deactivated by a quirk.
For more information check [1].
Add similar checks before calling libevdev_get_abs_info() to avoid
possible crashes.
[1] https://gitlab.freedesktop.org/libinput/libinput/-/issues/805
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Commit b5f0536a4f ("quirks: add a quirk for the Wacom 524c device")
added the quirk "AttrEventCodeDisable=ABS_TILT_X;ABS_TILT_Y;" to the
Wacom 524c.
When using the pen in a display with tilt support, the tilt X/Y axes
are set as changed. Using the pen again, but this time in the display
without tilt support, will try to get the tilt information, crashing.
Check the return value of libevdev_get_abs_info() to avoid this crash.
Fix https://gitlab.freedesktop.org/libinput/libinput/-/issues/805
Fixes: b5f0536a4f ("quirks: add a quirk for the Wacom 524c device")
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Tools default to 1% lower threshold (tip up) and 5% upper threshold (tip
down). But our distance vs pressure exclusion would reset the distance
for *any* pressure value, regardless how low that value was and how high
distance was in comparison.
A very low pressure value of less than 1% would then result in a
normalized pressure of 0, so we'd effectively just reset the distance to
zero and do nothing with the pressure. This can cause distance jumps
when the tool arbitrarily sends low pressure values while hovering as
seen in https://github.com/libsdl-org/SDL/pull/5481#issuecomment-1118969064
Commit 61bdc05fb0 from Dec 2017
"tablet: set the tip-up pressure threshold to 1%"
was presumably to address this but no longer (?) works.
Fix this by addressing multiple issues at the same time:
- anything under that 1% threshold is now considered as zero pressure
and any distance value is kept as-is. Once pressure reaches 1%,
distance is always zero.
- axis normalization is now from 1% to 100% (previously: upper threshold
to 100%). So a tip down event should always have ~4% pressure and we
may get tablet motion events with nonzero pressure before the tip down
event.
From memory, this was always intended anyway since a tip event should
require some significant pressure, maybe too high compared to e.g.
pressure-sensitive painting
- where a tablet has an offset, add the same 1%/5% thresholds, on top of
that offset. And keep adjusting those thresholds as we change the
offset. Assuming that the offset is the absolute minimum a worn-out
pen can reach, this gives us the same behaviour as a new pen. The
calculation here uses a simple approach so the actual range is
slightly larger than 5% but it'll do.
Previously, the lower threshold for an offset pen was the axis minimum
but that can never be reached. So there was probably an undiscovered
bug in there.
And fix a bunch of comments that were either wrong, confusing or
incomplete, e.g. the pressure thresholds were already in device
coordinates.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
A few lines north of here we return early if neither bit is set. If we
get to this point, at least one bit is set so this part of the condition
always evaluates to true.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
All cases we have in our code base have an otherwise unused variable to
loop through the array. Let's auto-declare this as part of the loop.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
The Wacom 524C device triggers a kernel bug in the InRange and Invert
handling. Every time BTN_TOUCH is set/unset the device also sets/unsets
BTN_TOOL_PEN even when we nominally have the eraser in proximity.
The event sequence effectively looks like this:
# on prox in
BTN_TOOL_RUBBER 1
-- SYN_REPORT ---
# on tip down
BTN_TOOL_PEN 1
BTN_TOUCH 1
-- SYN_REPORT ---
# on tip up
BTN_TOUCH 0
BTN_TOOL_PEN 0
-- SYN_REPORT ---
# on prox out
BTN_TOOL_RUBBER 1
-- SYN_REPORT ---
To work around this, bias our duplicate tool detection code towards the
eraser - if we have an eraser in-prox already and the pen goes
in-prox, ignore it and continue with the eraser. But if we have a pen
in-prox and the eraser goes in-prox as well, force a prox-out for the
pen and put the eraser in-prox.
Recording originally from
https://github.com/linuxwacom/xf86-input-wacom/issues/186Fixes#702
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/512 disables
input smoothing for AES devices. However, some AES devices produce
segmented/wobbly curves without smoothing. This change introduces an
`AttrTabletSmoothing` boolean property, which overrides the default smoothing
behavior.
See #632
Signed-off-by: Quytelda Kahja <quytelda@tamalin.org>
Data in
https://gitlab.freedesktop.org/libinput/libinput/-/issues/225#note_379034
suggests that AES devices have lower noise than the older EMR
devices, so let's try disabling it for those devices.
We can't directly get the AES devices in libinput unless we want to add a
whole bunch of quirks for the various vid/pid combinations. But we can get
that info from libwacom, primarily because we know that libwacom will list all
known AES pens for any device. So we can check for one that we know of (0x11)
and if it's in the list, the tablet is an AES tablet.
Setting the history size to 1 means we never do any actual smoothing.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This is merely the simple support that we use in the fallback backend as
well. It doesn't interact with touch arbitration directly but it'll be
good enough for the default use-case.
Fixes#476
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
With the previous patches a tablet would ignore a valid proximity out sequence
where it happends after a forced prox-out. Fix this by checking the state when
we're in forced proximity out - if we have a zero tool state but a tool
updated then we did get a proximity out.
And fix the existing test to check for that case.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This quirk was introduced for #248 was caused by buggy input-wacom drivers,
not by actual firmware, see
https://gitlab.freedesktop.org/libinput/libinput/issues/381#note_279371
This appears to be the only tablet where this fix was needed, but we've been
playing whack-a-mole ever since to work around the various other tablets that
break with this behavior in place.
So let's revert that fix and hope there aren't any other tablets out there
(and if they are, we can probably quirk those). The revert makes the ISDV4 pen
quirk obsolete (see 9cb089f2b6), so this was
folded into this commit.
This reverts commit 4f63345b60.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
The Aiptek 8000U has a pressure offset above our default (%5) but no
meaningful way of detecting that. It doesn't provide distance or BTN_TOOL_PEN
either, so our heuristics can't hook onto anything. BTN_TOUCH is set by this
tablet but not at consistent pressure thresholds.
Work around this by shipping a quirk that ups it to 70. Aiptek
re-uses USB IDs because of course they do, so this applies to more than one
device. Let's see what breaks.
Fixes#462
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
While buttons are down, don't let a forced proximity out happen. If the tablet
goes out of proximity normally that's fine but we don't force a proximity out.
Remains to be seen if this causes stuck buttons now on devices that rely on
the forced proximity out...
Fixes#403
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Where a pen was forced out of proximity and an eraser came into proximity
without axis updates on the prox-in, subsequent axis updates would trigger the
pen back into proximity. This resulted in two tools in proximity at once
though the new pen never went out of proximity
This would trigger crashes in various compositors/applications, see
https://github.com/xournalpp/xournalpp/issues/1141#issuecomment-578362497
The cause was a wrong condition introduced in ffd8c71e4e. We only need to
force the pen bit on if the current tool state is currently zero and no tool
update was sent with the axis event. In our case, the tool state is nonzero
already (eraser) and we can skip this bit.
Fixes#418
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Some graphics tablets (most or all Wacom, for example) do not emit
proximity out events when the tablet pen goes out of range. To
compensate for this, libinput synthesizes proximity out events when no
events are received for a certain period of time. Unfortunately, on some
tablets, this is fairly failure prone when moving the pen slowly. As a
workaround, this patch causes libinput to avoid synthesizing proximity
out events when the pen is still in contact with the tablet pad, as
defined by the TABLET_TOOL_IN_CONTACT status.
Pens that don't have a pressure offset (caused by a worn-out tip) still have
basic pressure thresholds to avoid tip events when we're still a bit away from
the tablet or barely touching it. That range is currently 5% of the pressure
for tip down, 1% for tip up.
This leaves us with 95% of the range and that needs to be scaled correctly,
otherwise the bottom 5% happen before a tip event and are inaccessible where
applications don't look at pressure before tip down.
Fixes#332
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Previously, the pressure range was calculated from the axis total range. A
device with a pressure offset making the bottom 10% inaccessible would lose
10% of that range as non-accessible. Due to the implementation, this affected
the upper range of the device, so the top N percent became unaccessible. Which
may be why no-one's noticed this yet.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
The offset handling was inconsistent, stored as relative to the axis minimum
but used as absolute in some places. Fix this by always using the absolute
value including the minimum (i.e. no pressure offset means offset == minimum).
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This pen has random timeouts, often when a button is pressed. This causes a
forced proximity out (and the button release) and makes the whole device a
tad unusable.
Nothing we can detect by heuristics since it looks like other devices that
don't send proximity out events. And the timeout can be quite high, the
recording in #304 has over 800ms for one sequence.
Fixes#304
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Where the proximity out event is delayed by the kernel, libinput would cause
an extra proxmity in-out after the forced proximity out event.
Event sequence is basically (k: kernel, l: libinput)
k: tablet axis events
l: tablet axis events
k: nothing for $proximity timer milliseconds
l: tablet proximity out
k: proximity out event
l: proximity in event
l: proximity out event
Fixes#306
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
__builtin_popcount might not be available and in this case, a bitwise-and
can accomplish the same task.
Signed-off-by: Michael Forney <mforney@mforney.org>
No real changes for the non-tablet code, but for tablets we now keep the
libwacom datbase around. The primary motivating factor here is response time
during tests - initializing the database under valgrind took longer than the
proximity timeouts and caused random test case failures when a proximity out
was triggered before we even got to process the first event.
This is unfortunately a burden on the runtime now since we keep libwacom
around whenever a tablet is connected. Not much of an impact though, I
suspect, chances are you're running a web browser and everything pales against
that anyway.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Follow-up to 6229df184e
We must not rely on the caller to toggle the left-handed bits correctly since
they may not know which devices belong together (despite device groups). Let's
do the right thing here, if the touchpad is set to left-handed, rotate the
tablet accordingly.
Note that the left-handed setting of the touchpad is left as-is
(right-handed). Until we have notifications about configuration changes, this
is the best we can do.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
There are tablets out there that *sometimes* send the right event sequence,
but are generally broken. So let's not disable that quirk even if we do get a
right sequence.
Affected devices: Lenovo Flex 5
Fixes#248Fixes#290
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Unlike virtually everything else, the tablet tool was processed at the time
the event was read rather than when the subsequent EV_SYN came in. This causes
difficulties with tablets that send the wrong BTN_TOOL_PEN events.
Moving the tool change processing to tablet_flush() makes the injection of the
BTN_TOOL_PEN event a lot easier, simply flipping the matching bit does the
job. It also makes it easier to ignore duplicate tool updates like we've seen
in #259.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
