397 lines
15 KiB
Python
397 lines
15 KiB
Python
'''
|
|
Native support of Wacom tablet from linuxwacom driver
|
|
=====================================================
|
|
|
|
To configure LinuxWacom, add this to your configuration::
|
|
|
|
[input]
|
|
pen = linuxwacom,/dev/input/event2,mode=pen
|
|
finger = linuxwacom,/dev/input/event3,mode=touch
|
|
|
|
.. note::
|
|
You must have read access to the input event.
|
|
|
|
You can use a custom range for the X, Y and pressure values.
|
|
On some drivers, the range reported is invalid.
|
|
To fix that, you can add these options to the argument line:
|
|
|
|
* invert_x : 1 to invert X axis
|
|
* invert_y : 1 to invert Y axis
|
|
* min_position_x : X minimum
|
|
* max_position_x : X maximum
|
|
* min_position_y : Y minimum
|
|
* max_position_y : Y maximum
|
|
* min_pressure : pressure minimum
|
|
* max_pressure : pressure maximum
|
|
'''
|
|
|
|
__all__ = ('LinuxWacomMotionEventProvider', 'LinuxWacomMotionEvent')
|
|
|
|
import os
|
|
from kivy.input.motionevent import MotionEvent
|
|
from kivy.input.shape import ShapeRect
|
|
|
|
|
|
class LinuxWacomMotionEvent(MotionEvent):
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
kwargs.setdefault('is_touch', True)
|
|
kwargs.setdefault('type_id', 'touch')
|
|
super().__init__(*args, **kwargs)
|
|
|
|
def depack(self, args):
|
|
self.sx = args['x']
|
|
self.sy = args['y']
|
|
self.profile = ['pos']
|
|
if 'size_w' in args and 'size_h' in args:
|
|
self.shape = ShapeRect()
|
|
self.shape.width = args['size_w']
|
|
self.shape.height = args['size_h']
|
|
self.profile.append('shape')
|
|
if 'pressure' in args:
|
|
self.pressure = args['pressure']
|
|
self.profile.append('pressure')
|
|
super().depack(args)
|
|
|
|
def __str__(self):
|
|
return '<LinuxWacomMotionEvent id=%d pos=(%f, %f) device=%s>' \
|
|
% (self.id, self.sx, self.sy, self.device)
|
|
|
|
|
|
if 'KIVY_DOC' in os.environ:
|
|
# documentation hack
|
|
LinuxWacomMotionEventProvider = None
|
|
|
|
else:
|
|
import threading
|
|
import collections
|
|
import struct
|
|
import fcntl
|
|
from kivy.input.provider import MotionEventProvider
|
|
from kivy.input.factory import MotionEventFactory
|
|
from kivy.logger import Logger
|
|
|
|
#
|
|
# This part is taken from linux-source-2.6.32/include/linux/input.h
|
|
#
|
|
|
|
# Event types
|
|
EV_SYN = 0x00
|
|
EV_KEY = 0x01
|
|
EV_REL = 0x02
|
|
EV_ABS = 0x03
|
|
EV_MSC = 0x04
|
|
EV_SW = 0x05
|
|
EV_LED = 0x11
|
|
EV_SND = 0x12
|
|
EV_REP = 0x14
|
|
EV_FF = 0x15
|
|
EV_PWR = 0x16
|
|
EV_FF_STATUS = 0x17
|
|
EV_MAX = 0x1f
|
|
EV_CNT = (EV_MAX + 1)
|
|
|
|
KEY_MAX = 0x2ff
|
|
|
|
# Synchronization events
|
|
SYN_REPORT = 0
|
|
SYN_CONFIG = 1
|
|
SYN_MT_REPORT = 2
|
|
|
|
# Misc events
|
|
MSC_SERIAL = 0x00
|
|
MSC_PULSELED = 0x01
|
|
MSC_GESTURE = 0x02
|
|
MSC_RAW = 0x03
|
|
MSC_SCAN = 0x04
|
|
MSC_MAX = 0x07
|
|
MSC_CNT = (MSC_MAX + 1)
|
|
|
|
ABS_X = 0x00
|
|
ABS_Y = 0x01
|
|
ABS_PRESSURE = 0x18
|
|
ABS_MISC = 0x28 # if 0, it's touch up
|
|
ABS_MT_TOUCH_MAJOR = 0x30 # Major axis of touching ellipse
|
|
ABS_MT_TOUCH_MINOR = 0x31 # Minor axis (omit if circular)
|
|
ABS_MT_WIDTH_MAJOR = 0x32 # Major axis of approaching ellipse
|
|
ABS_MT_WIDTH_MINOR = 0x33 # Minor axis (omit if circular)
|
|
ABS_MT_ORIENTATION = 0x34 # Ellipse orientation
|
|
ABS_MT_POSITION_X = 0x35 # Center X ellipse position
|
|
ABS_MT_POSITION_Y = 0x36 # Center Y ellipse position
|
|
ABS_MT_TOOL_TYPE = 0x37 # Type of touching device
|
|
ABS_MT_BLOB_ID = 0x38 # Group a set of packets as a blob
|
|
ABS_MT_TRACKING_ID = 0x39 # Unique ID of initiated contact
|
|
ABS_MT_PRESSURE = 0x3a # Pressure on contact area
|
|
|
|
# some ioctl base (with 0 value)
|
|
EVIOCGNAME = 2147501318
|
|
EVIOCGBIT = 2147501344
|
|
EVIOCGABS = 2149074240
|
|
|
|
# sizeof(struct input_event)
|
|
struct_input_event_sz = struct.calcsize('LLHHi')
|
|
struct_input_absinfo_sz = struct.calcsize('iiiiii')
|
|
sz_l = struct.calcsize('Q')
|
|
|
|
class LinuxWacomMotionEventProvider(MotionEventProvider):
|
|
|
|
options = ('min_position_x', 'max_position_x',
|
|
'min_position_y', 'max_position_y',
|
|
'min_pressure', 'max_pressure',
|
|
'invert_x', 'invert_y')
|
|
|
|
def __init__(self, device, args):
|
|
super(LinuxWacomMotionEventProvider, self).__init__(device, args)
|
|
self.input_fn = None
|
|
self.default_ranges = dict()
|
|
self.mode = 'touch'
|
|
|
|
# split arguments
|
|
args = args.split(',')
|
|
if not args:
|
|
Logger.error('LinuxWacom: No filename given in config')
|
|
Logger.error('LinuxWacom: Use /dev/input/event0 for example')
|
|
return
|
|
|
|
# read filename
|
|
self.input_fn = args[0]
|
|
Logger.info('LinuxWacom: Read event from <%s>' % self.input_fn)
|
|
|
|
# read parameters
|
|
for arg in args[1:]:
|
|
if arg == '':
|
|
continue
|
|
arg = arg.split('=')
|
|
|
|
# ensure it's a key = value
|
|
if len(arg) != 2:
|
|
err = 'LinuxWacom: Bad parameter' \
|
|
'%s: Not in key=value format.' % arg
|
|
Logger.error(err)
|
|
continue
|
|
|
|
# ensure the key exist
|
|
key, value = arg
|
|
if key == 'mode':
|
|
self.mode = value
|
|
continue
|
|
|
|
if key not in LinuxWacomMotionEventProvider.options:
|
|
Logger.error('LinuxWacom: unknown %s option' % key)
|
|
continue
|
|
|
|
# ensure the value
|
|
try:
|
|
self.default_ranges[key] = int(value)
|
|
except ValueError:
|
|
err = 'LinuxWacom: value %s invalid for %s' % (key, value)
|
|
Logger.error(err)
|
|
continue
|
|
|
|
# all good!
|
|
msg = 'LinuxWacom: Set custom %s to %d' % (key, int(value))
|
|
Logger.info(msg)
|
|
Logger.info('LinuxWacom: mode is <%s>' % self.mode)
|
|
|
|
def start(self):
|
|
if self.input_fn is None:
|
|
return
|
|
self.uid = 0
|
|
self.queue = collections.deque()
|
|
self.thread = threading.Thread(
|
|
target=self._thread_run,
|
|
kwargs=dict(
|
|
queue=self.queue,
|
|
input_fn=self.input_fn,
|
|
device=self.device,
|
|
default_ranges=self.default_ranges))
|
|
self.thread.daemon = True
|
|
self.thread.start()
|
|
|
|
def _thread_run(self, **kwargs):
|
|
input_fn = kwargs.get('input_fn')
|
|
queue = kwargs.get('queue')
|
|
device = kwargs.get('device')
|
|
drs = kwargs.get('default_ranges').get
|
|
touches = {}
|
|
touches_sent = []
|
|
l_points = {}
|
|
|
|
# prepare some vars to get limit of some component
|
|
range_min_position_x = 0
|
|
range_max_position_x = 2048
|
|
range_min_position_y = 0
|
|
range_max_position_y = 2048
|
|
range_min_pressure = 0
|
|
range_max_pressure = 255
|
|
invert_x = int(bool(drs('invert_x', 0)))
|
|
invert_y = int(bool(drs('invert_y', 0)))
|
|
reset_touch = False
|
|
|
|
def process(points):
|
|
actives = list(points.keys())
|
|
for args in points.values():
|
|
tid = args['id']
|
|
try:
|
|
touch = touches[tid]
|
|
except KeyError:
|
|
touch = LinuxWacomMotionEvent(device, tid, args)
|
|
touches[touch.id] = touch
|
|
if touch.sx == args['x'] \
|
|
and touch.sy == args['y'] \
|
|
and tid in touches_sent:
|
|
continue
|
|
touch.move(args)
|
|
if tid not in touches_sent:
|
|
queue.append(('begin', touch))
|
|
touches_sent.append(tid)
|
|
queue.append(('update', touch))
|
|
|
|
for tid in list(touches.keys())[:]:
|
|
if tid not in actives:
|
|
touch = touches[tid]
|
|
if tid in touches_sent:
|
|
touch.update_time_end()
|
|
queue.append(('end', touch))
|
|
touches_sent.remove(tid)
|
|
del touches[tid]
|
|
|
|
def normalize(value, vmin, vmax):
|
|
return (value - vmin) / float(vmax - vmin)
|
|
|
|
# open the input
|
|
try:
|
|
fd = open(input_fn, 'rb')
|
|
except IOError:
|
|
Logger.exception('Unable to open %s' % input_fn)
|
|
return
|
|
|
|
# get the controller name (EVIOCGNAME)
|
|
device_name = fcntl.ioctl(fd, EVIOCGNAME + (256 << 16),
|
|
" " * 256).split('\x00')[0]
|
|
Logger.info('LinuxWacom: using <%s>' % device_name)
|
|
|
|
# get abs infos
|
|
bit = fcntl.ioctl(fd, EVIOCGBIT + (EV_MAX << 16), ' ' * sz_l)
|
|
bit, = struct.unpack('Q', bit)
|
|
for x in range(EV_MAX):
|
|
# preserve this, we may want other things than EV_ABS
|
|
if x != EV_ABS:
|
|
continue
|
|
# EV_ABS available for this device ?
|
|
if (bit & (1 << x)) == 0:
|
|
continue
|
|
# ask abs info keys to the devices
|
|
sbit = fcntl.ioctl(fd, EVIOCGBIT + x + (KEY_MAX << 16),
|
|
' ' * sz_l)
|
|
sbit, = struct.unpack('Q', sbit)
|
|
for y in range(KEY_MAX):
|
|
if (sbit & (1 << y)) == 0:
|
|
continue
|
|
absinfo = fcntl.ioctl(fd, EVIOCGABS + y +
|
|
(struct_input_absinfo_sz << 16),
|
|
' ' * struct_input_absinfo_sz)
|
|
abs_value, abs_min, abs_max, abs_fuzz, \
|
|
abs_flat, abs_res = struct.unpack('iiiiii', absinfo)
|
|
if y == ABS_X:
|
|
range_min_position_x = drs('min_position_x', abs_min)
|
|
range_max_position_x = drs('max_position_x', abs_max)
|
|
Logger.info('LinuxWacom: ' +
|
|
'<%s> range position X is %d - %d' % (
|
|
device_name, abs_min, abs_max))
|
|
elif y == ABS_Y:
|
|
range_min_position_y = drs('min_position_y', abs_min)
|
|
range_max_position_y = drs('max_position_y', abs_max)
|
|
Logger.info('LinuxWacom: ' +
|
|
'<%s> range position Y is %d - %d' % (
|
|
device_name, abs_min, abs_max))
|
|
elif y == ABS_PRESSURE:
|
|
range_min_pressure = drs('min_pressure', abs_min)
|
|
range_max_pressure = drs('max_pressure', abs_max)
|
|
Logger.info('LinuxWacom: ' +
|
|
'<%s> range pressure is %d - %d' % (
|
|
device_name, abs_min, abs_max))
|
|
|
|
# read until the end
|
|
changed = False
|
|
touch_id = 0
|
|
touch_x = 0
|
|
touch_y = 0
|
|
touch_pressure = 0
|
|
while fd:
|
|
|
|
data = fd.read(struct_input_event_sz)
|
|
if len(data) < struct_input_event_sz:
|
|
break
|
|
|
|
# extract each event
|
|
for i in range(len(data) / struct_input_event_sz):
|
|
ev = data[i * struct_input_event_sz:]
|
|
|
|
# extract timeval + event infos
|
|
tv_sec, tv_usec, ev_type, ev_code, ev_value = \
|
|
struct.unpack('LLHHi', ev[:struct_input_event_sz])
|
|
|
|
if ev_type == EV_SYN and ev_code == SYN_REPORT:
|
|
if touch_id in l_points:
|
|
p = l_points[touch_id]
|
|
else:
|
|
p = dict()
|
|
l_points[touch_id] = p
|
|
p['id'] = touch_id
|
|
if not reset_touch:
|
|
p['x'] = touch_x
|
|
p['y'] = touch_y
|
|
p['pressure'] = touch_pressure
|
|
if self.mode == 'pen' \
|
|
and touch_pressure == 0 \
|
|
and not reset_touch:
|
|
del l_points[touch_id]
|
|
if changed:
|
|
if 'x' not in p:
|
|
reset_touch = False
|
|
continue
|
|
process(l_points)
|
|
changed = False
|
|
if reset_touch:
|
|
l_points.clear()
|
|
reset_touch = False
|
|
process(l_points)
|
|
elif ev_type == EV_MSC and ev_code == MSC_SERIAL:
|
|
touch_id = ev_value
|
|
elif ev_type == EV_ABS and ev_code == ABS_X:
|
|
val = normalize(ev_value,
|
|
range_min_position_x,
|
|
range_max_position_x)
|
|
if invert_x:
|
|
val = 1. - val
|
|
touch_x = val
|
|
changed = True
|
|
elif ev_type == EV_ABS and ev_code == ABS_Y:
|
|
val = 1. - normalize(ev_value,
|
|
range_min_position_y,
|
|
range_max_position_y)
|
|
if invert_y:
|
|
val = 1. - val
|
|
touch_y = val
|
|
changed = True
|
|
elif ev_type == EV_ABS and ev_code == ABS_PRESSURE:
|
|
touch_pressure = normalize(ev_value,
|
|
range_min_pressure,
|
|
range_max_pressure)
|
|
changed = True
|
|
elif ev_type == EV_ABS and ev_code == ABS_MISC:
|
|
if ev_value == 0:
|
|
reset_touch = True
|
|
|
|
def update(self, dispatch_fn):
|
|
# dispatch all event from threads
|
|
try:
|
|
while True:
|
|
event_type, touch = self.queue.popleft()
|
|
dispatch_fn(event_type, touch)
|
|
except:
|
|
pass
|
|
|
|
MotionEventFactory.register('linuxwacom', LinuxWacomMotionEventProvider)
|