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|
/*
* Copyright 1995-2002 by Frederic Lepied, France. <Lepied@XFree86.org>
* Copyright 2002-2010 by Ping Cheng, Wacom. <pingc@wacom.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "xf86Wacom.h"
#include "Xwacom.h"
#include "wcmFilter.h"
#include "wcmTouchFilter.h"
#include <xkbsrv.h>
#include <xf86_OSproc.h>
/* X servers pre 1.9 didn't copy data passed into xf86Post*Event.
* Data passed in would be modified, requiring the driver to copy the
* data beforehand.
*/
#if GET_ABI_MAJOR(ABI_XINPUT_VERSION) < 11
static int v[MAX_VALUATORS];
static int *VCOPY(const int *valuators, int nvals)
{
memcpy(v, valuators, nvals * sizeof(int));
return v;
}
#else /* ABI >= 11 */
#define VCOPY(vals, nval) (vals)
#endif
/*****************************************************************************
* Static functions
****************************************************************************/
static int applyPressureCurve(WacomDevicePtr pDev, const WacomDeviceStatePtr pState);
static void commonDispatchDevice(WacomCommonPtr common,
unsigned int channel,
const WacomChannelPtr pChannel,
enum WacomSuppressMode suppress);
static void sendAButton(InputInfoPtr pInfo, int button, int mask,
int first_val, int num_vals, int *valuators);
/*****************************************************************************
* Utility functions
****************************************************************************/
/**
* @return TRUE if the device is set to abolute mode, or FALSE otherwise
*/
Bool is_absolute(InputInfoPtr pInfo)
{
WacomDevicePtr priv = (WacomDevicePtr)pInfo->private;
return !!(priv->flags & ABSOLUTE_FLAG);
}
/**
* Set the device to absolute or relative mode
*
* @param absolute TRUE to set the device to absolute mode.
*/
void set_absolute(InputInfoPtr pInfo, Bool absolute)
{
WacomDevicePtr priv = (WacomDevicePtr)pInfo->private;
if (absolute)
priv->flags |= ABSOLUTE_FLAG;
else
priv->flags &= ~ABSOLUTE_FLAG;
}
/*****************************************************************************
* wcmMappingFactor --
* calculate the proper tablet to screen mapping factor according to the
* screen/desktop size and the tablet size
****************************************************************************/
void wcmMappingFactor(InputInfoPtr pInfo)
{
WacomDevicePtr priv = (WacomDevicePtr) pInfo->private;
double size_x, size_y;
DBG(10, priv, "\n"); /* just prints function name */
DBG(10, priv,
"Active tablet area x=%d y=%d map\n",
priv->bottomX, priv->bottomY);
/* bottomX/bottomY are scaled values of maxX/maxY such that it
* will scale tablet to screen ratio when passed to xf86AxisScale().
* Use this to compute similar factor for scaling in relative
* mode. If screen:tablet are 1:1 ratio then no scaling.
*/
size_x = priv->bottomX - priv->topX;
size_y = priv->bottomY - priv->topY;
priv->factorX = size_x / priv->bottomX;
priv->factorY = size_y / priv->bottomY;
DBG(2, priv, "X factor = %.3f, Y factor = %.3f\n",
priv->factorX, priv->factorY);
}
/*****************************************************************************
* wcmSendButtons --
* Send button events by comparing the current button mask with the
* previous one.
****************************************************************************/
static void wcmSendButtons(InputInfoPtr pInfo, int buttons,
int first_val, int num_vals, int *valuators)
{
int button, mask, first_button;
WacomDevicePtr priv = (WacomDevicePtr) pInfo->private;
WacomCommonPtr common = priv->common;
DBG(6, priv, "buttons=%d\n", buttons);
/* button behaviour (TPC button on):
if only tip is pressed/released, send button 1 events
if button N is pressed and tip is pressed/released, send
button N events.
if tip is already down and button N is pressed/released,
send button 1 release, then button N events.
*/
first_button = 0; /* zero-indexed because of mask */
/* Tablet PC buttons only apply to penabled devices */
if (common->wcmTPCButton && IsStylus(priv))
{
first_button = (buttons <= 1) ? 0 : 1;
/* tip released? release all buttons */
if ((buttons & 1) == 0)
buttons = 0;
/* tip pressed? send all other button presses */
else if ((buttons & 1) != (priv->oldButtons & 1))
priv->oldButtons = 0;
/* other button changed while tip is still down? release tip */
else if ((buttons & 1) && (buttons != priv->oldButtons))
{
buttons &= ~1;
first_button = 0;
}
}
for (button = first_button; button < WCM_MAX_BUTTONS; button++)
{
mask = 1 << button;
if ((mask & priv->oldButtons) != (mask & buttons))
sendAButton(pInfo, button, (mask & buttons),
first_val, num_vals, valuators);
}
}
void wcmEmitKeycode (DeviceIntPtr keydev, int keycode, int state)
{
xf86PostKeyboardEvent (keydev, keycode, state);
}
/*****************************************************************************
* countPresses
* Count the number of key/button presses not released for the given key
* array.
****************************************************************************/
static int countPresses(int keybtn, unsigned int* keys, int size)
{
int i, act, count = 0;
for (i = 0; i < size; i++)
{
act = keys[i];
if ((act & AC_CODE) == keybtn)
count += (act & AC_KEYBTNPRESS) ? 1 : -1;
}
return count;
}
static void sendAction(InputInfoPtr pInfo, int press,
unsigned int *keys, int nkeys,
int first_val, int num_val, int *valuators)
{
int i;
/* Actions only trigger on press, not release */
for (i = 0; press && i < nkeys; i++)
{
unsigned int action = keys[i];
if (!action)
break;
switch ((action & AC_TYPE))
{
case AC_BUTTON:
{
int btn_no = (action & AC_CODE);
int is_press = (action & AC_KEYBTNPRESS);
xf86PostButtonEventP(pInfo->dev,
is_absolute(pInfo), btn_no,
is_press, first_val, num_val,
VCOPY(valuators, num_val));
}
break;
case AC_KEY:
{
int key_code = (action & AC_CODE);
int is_press = (action & AC_KEYBTNPRESS);
wcmEmitKeycode(pInfo->dev, key_code, is_press);
}
break;
case AC_MODETOGGLE:
if (press)
wcmDevSwitchModeCall(pInfo,
(is_absolute(pInfo)) ? Relative : Absolute); /* not a typo! */
break;
}
}
/* Release all non-released keys for this button. */
for (i = 0; !press && i < nkeys; i++)
{
unsigned int action = keys[i];
switch ((action & AC_TYPE))
{
case AC_BUTTON:
{
int btn_no = (action & AC_CODE);
/* don't care about releases here */
if (!(action & AC_KEYBTNPRESS))
break;
if (countPresses(btn_no, &keys[i], nkeys - i))
xf86PostButtonEventP(pInfo->dev,
is_absolute(pInfo), btn_no,
0, first_val, num_val,
VCOPY(valuators, num_val));
}
break;
case AC_KEY:
{
int key_code = (action & AC_CODE);
/* don't care about releases here */
if (!(action & AC_KEYBTNPRESS))
break;
if (countPresses(key_code, &keys[i], nkeys - i))
wcmEmitKeycode(pInfo->dev, key_code, 0);
}
}
}
}
/*****************************************************************************
* sendAButton --
* Send one button event, called by wcmSendButtons
****************************************************************************/
static void sendAButton(InputInfoPtr pInfo, int button, int mask,
int first_val, int num_val, int *valuators)
{
WacomDevicePtr priv = (WacomDevicePtr) pInfo->private;
#ifdef DEBUG
WacomCommonPtr common = priv->common;
#endif
DBG(4, priv, "TPCButton(%s) button=%d state=%d\n",
common->wcmTPCButton ? "on" : "off", button, mask);
if (!priv->keys[button][0])
return;
sendAction(pInfo, (mask != 0), priv->keys[button],
ARRAY_SIZE(priv->keys[button]),
first_val, num_val, valuators);
}
/**
* Get the distance an axis was scrolled. This function is aware
* of the different ways different scrolling axes work and strives
* to produce a common representation of relative change.
*
* @param current Current value of the axis
* @param old Previous value of the axis
* @param wrap Maximum value before wraparound occurs (0 if axis does not wrap)
* @param flags Flags defining axis attributes: AXIS_INVERT and AXIS_BITWISE
* @return Relative change in axis value
*/
static int getScrollDelta(int current, int old, int wrap, int flags)
{
int delta;
if (flags & AXIS_BITWISE)
{
current = log2((current << 1) | 0x01);
old = log2((old << 1) | 0x01);
wrap = log2((wrap << 1) | 0x01);
}
delta = current - old;
if (flags & AXIS_INVERT)
delta = -delta;
if (wrap != 0)
{
/* Wraparound detection. If the distance old..current
* is larger than the old..current considering the
* wraparound, assume wraparound and readjust */
int wrap_delta;
if (delta < 0)
wrap_delta = (wrap + 1) + delta;
else
wrap_delta = -((wrap + 1) - delta);
if (abs(wrap_delta) < abs(delta))
delta = wrap_delta;
}
return delta;
}
/**
* Get the scroll button/action to send given the delta of
* the scrolling axis and the possible events that can be
* sent.
*
* @param delta Amount of change in the scrolling axis
* @param action_up Array index of action to send on scroll up
* @param action_dn Array index of action to send on scroll down
* @return Array index of action that should be performed, or -1 if none.
*/
static int getWheelButton(int delta, int action_up, int action_dn)
{
if (delta > 0)
return action_up;
else if (delta < 0)
return action_dn;
else
return -1;
}
/**
* Send button or actions for a scrolling axis.
*
* @param button X button number to send if no action is defined
* @param action Action to send
* @param nactions Length of action array
* @param pInfo
* @param first_val
* @param num_vals
* @param valuators
*/
static void sendWheelStripEvent(unsigned int *action, int nactions, InputInfoPtr pInfo,
int first_val, int num_vals, int *valuators)
{
sendAction(pInfo, 1, action, nactions, first_val, num_vals, valuators);
sendAction(pInfo, 0, action, nactions, first_val, num_vals, valuators);
}
/*****************************************************************************
* sendWheelStripEvents --
* Send events defined for relative/absolute wheels or strips
****************************************************************************/
static void sendWheelStripEvents(InputInfoPtr pInfo, const WacomDeviceState* ds,
int first_val, int num_vals, int *valuators)
{
WacomDevicePtr priv = (WacomDevicePtr) pInfo->private;
int delta = 0, idx = 0;
DBG(10, priv, "\n");
/* emulate events for left strip */
delta = getScrollDelta(ds->stripx, priv->oldStripX, 0, AXIS_INVERT | AXIS_BITWISE);
idx = getWheelButton(delta, STRIP_LEFT_UP, STRIP_LEFT_DN);
if (idx >= 0 && IsPad(priv) && priv->oldProximity == ds->proximity)
{
DBG(10, priv, "Left touch strip scroll delta = %d\n", delta);
sendWheelStripEvent(priv->strip_keys[idx], ARRAY_SIZE(priv->strip_keys[idx]),
pInfo, first_val, num_vals, valuators);
}
/* emulate events for right strip */
delta = getScrollDelta(ds->stripy, priv->oldStripY, 0, AXIS_INVERT | AXIS_BITWISE);
idx = getWheelButton(delta, STRIP_RIGHT_UP, STRIP_RIGHT_DN);
if (idx >= 0 && IsPad(priv) && priv->oldProximity == ds->proximity)
{
DBG(10, priv, "Right touch strip scroll delta = %d\n", delta);
sendWheelStripEvent(priv->strip_keys[idx], ARRAY_SIZE(priv->strip_keys[idx]),
pInfo, first_val, num_vals, valuators);
}
/* emulate events for relative wheel */
delta = getScrollDelta(ds->relwheel, 0, 0, 0);
idx = getWheelButton(delta, WHEEL_REL_UP, WHEEL_REL_DN);
if (idx >= 0 && (IsCursor(priv) || IsPad(priv)) && priv->oldProximity == ds->proximity)
{
DBG(10, priv, "Relative wheel scroll delta = %d\n", delta);
sendWheelStripEvent(priv->wheel_keys[idx], ARRAY_SIZE(priv->wheel_keys[idx]),
pInfo, first_val, num_vals, valuators);
}
/* emulate events for left touch ring */
delta = getScrollDelta(ds->abswheel, priv->oldWheel, MAX_PAD_RING, AXIS_INVERT);
idx = getWheelButton(delta, WHEEL_ABS_UP, WHEEL_ABS_DN);
if (idx >= 0 && IsPad(priv) && priv->oldProximity == ds->proximity)
{
DBG(10, priv, "Left touch wheel scroll delta = %d\n", delta);
sendWheelStripEvent(priv->wheel_keys[idx], ARRAY_SIZE(priv->wheel_keys[idx]),
pInfo, first_val, num_vals, valuators);
}
/* emulate events for right touch ring */
delta = getScrollDelta(ds->abswheel2, priv->oldWheel2, MAX_PAD_RING, AXIS_INVERT);
idx = getWheelButton(delta, WHEEL2_ABS_UP, WHEEL2_ABS_DN);
if (idx >= 0 && IsPad(priv) && priv->oldProximity == ds->proximity)
{
DBG(10, priv, "Right touch wheel scroll delta = %d\n", delta);
sendWheelStripEvent(priv->wheel_keys[idx], ARRAY_SIZE(priv->wheel_keys[idx]),
pInfo, first_val, num_vals, valuators);
}
}
/*****************************************************************************
* sendCommonEvents --
* Send events common between pad and stylus/cursor/eraser.
****************************************************************************/
static void sendCommonEvents(InputInfoPtr pInfo, const WacomDeviceState* ds,
int first_val, int num_vals, int *valuators)
{
WacomDevicePtr priv = (WacomDevicePtr) pInfo->private;
int buttons = ds->buttons;
/* send button events when state changed or first time in prox and button unpresses */
if (priv->oldButtons != buttons || (!priv->oldProximity && !buttons))
wcmSendButtons(pInfo,buttons, first_val, num_vals, valuators);
/* emulate wheel/strip events when defined */
if ( ds->relwheel || (ds->abswheel != priv->oldWheel) || (ds->abswheel2 != priv->oldWheel2) ||
( (ds->stripx - priv->oldStripX) && ds->stripx && priv->oldStripX) ||
((ds->stripy - priv->oldStripY) && ds->stripy && priv->oldStripY) )
sendWheelStripEvents(pInfo, ds, first_val, num_vals, valuators);
}
/* rotate x and y before post X inout events */
void wcmRotateAndScaleCoordinates(InputInfoPtr pInfo, int* x, int* y)
{
WacomDevicePtr priv = (WacomDevicePtr) pInfo->private;
WacomCommonPtr common = priv->common;
DeviceIntPtr dev = pInfo->dev;
AxisInfoPtr axis_x, axis_y;
int tmp_coord;
/* scale into on topX/topY area */
axis_x = &dev->valuator->axes[0];
axis_y = &dev->valuator->axes[1];
/* Don't try to scale relative axes */
if (axis_x->max_value > axis_x->min_value)
*x = xf86ScaleAxis(*x, axis_x->max_value, axis_x->min_value,
priv->bottomX, priv->topX);
if (axis_y->max_value > axis_y->min_value)
*y = xf86ScaleAxis(*y, axis_y->max_value, axis_y->min_value,
priv->bottomY, priv->topY);
/* coordinates are now in the axis rage we advertise for the device */
if (common->wcmRotate == ROTATE_CW || common->wcmRotate == ROTATE_CCW)
{
tmp_coord = *x;
*x = xf86ScaleAxis(*y,
axis_x->max_value, axis_x->min_value,
axis_y->max_value, axis_y->min_value);
*y = xf86ScaleAxis(tmp_coord,
axis_y->max_value, axis_y->min_value,
axis_x->max_value, axis_x->min_value);
}
if (common->wcmRotate == ROTATE_CW)
*y = axis_y->max_value - (*y - axis_y->min_value);
else if (common->wcmRotate == ROTATE_CCW)
*x = axis_x->max_value - (*x - axis_x->min_value);
else if (common->wcmRotate == ROTATE_HALF)
{
*x = axis_x->max_value - (*x - axis_x->min_value);
*y = axis_y->max_value - (*y - axis_y->min_value);
}
DBG(10, priv, "rotate/scaled to %d/%d\n", *x, *y);
}
static void wcmUpdateOldState(const InputInfoPtr pInfo,
const WacomDeviceState *ds)
{
const WacomDevicePtr priv = (WacomDevicePtr) pInfo->private;
int tx, ty;
priv->oldWheel = ds->abswheel;
priv->oldWheel2 = ds->abswheel2;
priv->oldButtons = ds->buttons;
if (IsPad(priv))
{
tx = ds->stripx;
ty = ds->stripy;
} else
{
tx = ds->tiltx;
ty = ds->tilty;
}
priv->oldX = priv->currentX;
priv->oldY = priv->currentY;
priv->oldZ = ds->pressure;
priv->oldTiltX = tx;
priv->oldTiltY = ty;
priv->oldStripX = ds->stripx;
priv->oldStripY = ds->stripy;
priv->oldRot = ds->rotation;
priv->oldThrottle = ds->throttle;
}
static void
wcmSendPadEvents(InputInfoPtr pInfo, const WacomDeviceState* ds,
int first_val, int num_vals, int *valuators)
{
int i;
WacomDevicePtr priv = (WacomDevicePtr) pInfo->private;
if (!priv->oldProximity && ds->proximity)
xf86PostProximityEventP(pInfo->dev, 1, first_val, num_vals, VCOPY(valuators, num_vals));
for (i = 0; i < num_vals; i++)
if (valuators[i])
break;
if (i < num_vals || ds->buttons || ds->relwheel ||
(ds->abswheel != priv->oldWheel) || (ds->abswheel2 != priv->oldWheel2))
{
sendCommonEvents(pInfo, ds, first_val, num_vals, valuators);
/* xf86PostMotionEvent is only needed to post the valuators
* It should NOT move the cursor.
*/
xf86PostMotionEventP(pInfo->dev, TRUE, first_val, num_vals,
VCOPY(valuators, num_vals));
}
else
{
if (priv->oldButtons)
wcmSendButtons(pInfo, ds->buttons, first_val, num_vals, valuators);
}
if (priv->oldProximity && !ds->proximity)
xf86PostProximityEventP(pInfo->dev, 0, first_val, num_vals,
VCOPY(valuators, num_vals));
}
/* Send events for all tools but pads */
static void
wcmSendNonPadEvents(InputInfoPtr pInfo, const WacomDeviceState *ds,
int first_val, int num_vals, int *valuators)
{
WacomDevicePtr priv = (WacomDevicePtr) pInfo->private;
if (!is_absolute(pInfo))
{
valuators[0] -= priv->oldX;
valuators[1] -= priv->oldY;
valuators[2] -= priv->oldZ;
if (IsCursor(priv))
{
valuators[3] -= priv->oldRot;
valuators[4] -= priv->oldThrottle;
} else
{
valuators[3] -= priv->oldTiltX;
valuators[4] -= priv->oldTiltY;
}
valuators[5] -= priv->oldWheel;
valuators[6] -= priv->oldWheel2;
}
/* coordinates are ready we can send events */
if (ds->proximity)
{
/* unify acceleration in both directions
* for relative mode to draw a circle
*/
if (!is_absolute(pInfo))
valuators[0] *= priv->factorY / priv->factorX;
else
{
/* Padding virtual values */
wcmVirtualTabletPadding(pInfo);
valuators[0] += priv->leftPadding;
valuators[1] += priv->topPadding;
}
/* don't emit proximity events if device does not support proximity */
if ((pInfo->dev->proximity && !priv->oldProximity))
xf86PostProximityEventP(pInfo->dev, 1, first_val, num_vals,
VCOPY(valuators, num_vals));
/* Move the cursor to where it should be before sending button events */
if(!(priv->flags & BUTTONS_ONLY_FLAG))
{
xf86PostMotionEventP(pInfo->dev, is_absolute(pInfo),
first_val, num_vals,
VCOPY(valuators, num_vals));
/* For relative events, do not repost
* the valuators. Otherwise, a button
* event in sendCommonEvents will move the
* axes again.
*/
if (!is_absolute(pInfo))
{
first_val = 0;
num_vals = 0;
}
}
sendCommonEvents(pInfo, ds, first_val, num_vals, valuators);
}
else /* not in proximity */
{
int buttons = 0;
/* reports button up when the device has been
* down and becomes out of proximity */
if (priv->oldButtons)
wcmSendButtons(pInfo, buttons, first_val, num_vals, valuators);
if (priv->oldProximity)
xf86PostProximityEventP(pInfo->dev, 0, first_val, num_vals,
VCOPY(valuators, num_vals));
} /* not in proximity */
}
#define IsArtPen(ds) (ds->device_id == 0x885 || ds->device_id == 0x804 || ds->device_id == 0x100804)
/*****************************************************************************
* wcmSendEvents --
* Send events according to the device state.
****************************************************************************/
void wcmSendEvents(InputInfoPtr pInfo, const WacomDeviceState* ds)
{
#ifdef DEBUG
int is_button = !!(ds->buttons);
#endif
int type = ds->device_type;
int id = ds->device_id;
unsigned int serial = ds->serial_num;
int x = ds->x;
int y = ds->y;
int z = ds->pressure;
int tx = ds->tiltx;
int ty = ds->tilty;
WacomDevicePtr priv = (WacomDevicePtr) pInfo->private;
int v3, v4, v5, v6;
int valuators[priv->naxes];
if (priv->serial && serial != priv->serial)
{
DBG(10, priv, "serial number"
" is %u but your system configured %u",
serial, (int)priv->serial);
return;
}
wcmUpdateSerial(pInfo, serial, id);
/* don't move the cursor when going out-prox */
if (!ds->proximity)
{
x = priv->oldX;
y = priv->oldY;
}
/* use tx and ty to report stripx and stripy */
if (type == PAD_ID)
{
tx = ds->stripx;
ty = ds->stripy;
}
DBG(7, priv, "[%s] o_prox=%s x=%d y=%d z=%d "
"b=%s b=%d tx=%d ty=%d wl=%d wl2=%d rot=%d th=%d\n",
pInfo->type_name,
priv->oldProximity ? "true" : "false",
x, y, z, is_button ? "true" : "false", ds->buttons,
tx, ty, ds->abswheel, ds->abswheel2, ds->rotation, ds->throttle);
if (ds->proximity)
wcmRotateAndScaleCoordinates(pInfo, &x, &y);
if (IsCursor(priv))
{
v3 = ds->rotation;
v4 = ds->throttle;
}
else /* Intuos styli have tilt */
{
v3 = tx;
v4 = ty;
}
v5 = ds->abswheel;
v6 = ds->abswheel2;
if (IsStylus(priv) && !IsArtPen(ds))
{
/* Normalize abswheel airbrush data to Art Pen rotation range.
* We do not normalize Art Pen. They are already at the range.
*/
v5 = ds->abswheel * MAX_ROTATION_RANGE/
(double)MAX_ABS_WHEEL + MIN_ROTATION;
}
DBG(6, priv, "%s prox=%d\tx=%d"
"\ty=%d\tz=%d\tv3=%d\tv4=%d\tv5=%d\tv6=%d\tid=%d"
"\tserial=%u\tbutton=%s\tbuttons=%d\n",
is_absolute(pInfo) ? "abs" : "rel",
ds->proximity,
x, y, z, v3, v4, v5, v6, id, serial,
is_button ? "true" : "false", ds->buttons);
priv->currentX = x;
priv->currentY = y;
/* update the old records */
if(!priv->oldProximity)
{
wcmUpdateOldState(pInfo, ds);
priv->oldButtons = 0;
}
valuators[0] = x;
valuators[1] = y;
valuators[2] = z;
valuators[3] = v3;
valuators[4] = v4;
valuators[5] = v5;
valuators[6] = v6;
if (type == PAD_ID)
wcmSendPadEvents(pInfo, ds, 3, priv->naxes - 3, &valuators[3]); /* pad doesn't post x/y/z */
else {
/* don't move the cursor if in gesture mode (except drag mode) */
if ((type != TOUCH_ID) || wcmTouchNeedSendEvents(priv->common))
wcmSendNonPadEvents(pInfo, ds, 0, priv->naxes, valuators);
}
priv->oldProximity = ds->proximity;
if (ds->proximity)
wcmUpdateOldState(pInfo, ds);
else
{
priv->oldButtons = 0;
priv->oldWheel = MAX_PAD_RING + 1;
priv->oldWheel2 = MAX_PAD_RING + 1;
priv->oldX = 0;
priv->oldY = 0;
priv->oldZ = 0;
priv->oldTiltX = 0;
priv->oldTiltY = 0;
priv->oldStripX = 0;
priv->oldStripY = 0;
priv->oldRot = 0;
priv->oldThrottle = 0;
priv->devReverseCount = 0;
priv->old_serial = serial;
priv->old_device_id = id;
wcmUpdateSerial(pInfo, 0, 0);
}
}
/**
* Determine whether device state has changed enough to warrant further
* processing. The driver's "suppress" setting decides how much
* movement/state change must occur before we process events to avoid
* overloading the server with minimal changes (and getting fuzzy events).
* wcmCheckSuppress ensures that events meet this standard.
*
* @param dsOrig Previous device state
* @param dsNew Current device state
*
* @retval SUPPRESS_ALL Ignore this event completely.
* @retval SUPPRESS_NONE Process event normally.
* @retval SUPPRESS_NON_MOTION Suppress all data but motion data.
*/
static enum WacomSuppressMode
wcmCheckSuppress(WacomCommonPtr common,
const WacomDeviceState* dsOrig,
WacomDeviceState* dsNew)
{
int suppress = common->wcmSuppress;
enum WacomSuppressMode returnV = SUPPRESS_NONE;
/* Ignore all other changes that occur after initial out-of-prox. */
if (!dsNew->proximity && !dsOrig->proximity)
return SUPPRESS_ALL;
/* Never ignore proximity changes. */
if (dsOrig->proximity != dsNew->proximity) goto out;
if (dsOrig->buttons != dsNew->buttons) goto out;
if (dsOrig->stripx != dsNew->stripx) goto out;
if (dsOrig->stripy != dsNew->stripy) goto out;
/* FIXME: we should have different suppress values for different
* axes with vastly different ranges.
*/
if (abs(dsOrig->tiltx - dsNew->tiltx) > suppress) goto out;
if (abs(dsOrig->tilty - dsNew->tilty) > suppress) goto out;
if (abs(dsOrig->pressure - dsNew->pressure) > suppress) goto out;
if (abs(dsOrig->throttle - dsNew->throttle) > suppress) goto out;
if (abs(dsOrig->rotation - dsNew->rotation) > suppress &&
(1800 - abs(dsOrig->rotation - dsNew->rotation)) > suppress) goto out;
/* look for change in absolute wheel position
* or any relative wheel movement
*/
if (abs(dsOrig->abswheel - dsNew->abswheel) > suppress) goto out;
if (abs(dsOrig->abswheel2 - dsNew->abswheel2) > suppress) goto out;
if (dsNew->relwheel != 0) goto out;
returnV = SUPPRESS_ALL;
out:
/* Special handling for cursor: if nothing else changed but the
* pointer x/y, suppress all but cursor movement. This return value
* is used in commonDispatchDevice to short-cut event processing.
*/
if ((abs(dsOrig->x - dsNew->x) > suppress) ||
(abs(dsOrig->y - dsNew->y) > suppress))
{
if (returnV == SUPPRESS_ALL)
returnV = SUPPRESS_NON_MOTION;
}
else /* don't move cursor */
{
dsNew->x = dsOrig->x;
dsNew->y = dsOrig->y;
}
DBG(10, common, "level = %d"
" return value = %d\n", suppress, returnV);
return returnV;
}
/*****************************************************************************
* wcmEvent -
* Handles suppression, transformation, filtering, and event dispatch.
****************************************************************************/
void wcmEvent(WacomCommonPtr common, unsigned int channel,
const WacomDeviceState* pState)
{
WacomDeviceState* pLast;
WacomDeviceState ds;
WacomChannelPtr pChannel;
enum WacomSuppressMode suppress;
WacomDevicePtr priv = common->wcmDevices;
pChannel = common->wcmChannel + channel;
pLast = &pChannel->valid.state;
DBG(10, common, "channel = %d\n", channel);
/* sanity check the channel */
if (channel >= MAX_CHANNELS)
return;
/* we must copy the state because certain types of filtering
* will need to change the values (ie. for error correction) */
ds = *pState;
DBG(10, common,
"c=%d i=%d t=%d s=%u x=%d y=%d b=%d "
"p=%d rz=%d tx=%d ty=%d aw=%d aw2=%d rw=%d "
"t=%d px=%d st=%d cs=%d \n",
channel,
ds.device_id,
ds.device_type,
ds.serial_num,
ds.x, ds.y, ds.buttons,
ds.pressure, ds.rotation, ds.tiltx,
ds.tilty, ds.abswheel, ds.abswheel2, ds.relwheel, ds.throttle,
ds.proximity, ds.sample,
pChannel->nSamples);
/* touch device is needed for gesture later */
if ((ds.device_type == TOUCH_ID) && !IsTouch(priv) &&
TabletHasFeature(common, WCM_2FGT))
{
for (; priv != NULL && !IsTouch(priv); priv = priv->next);
if (priv == NULL || !IsTouch(priv))
{
priv = common->wcmDevices;
LogMessageVerbSigSafe(X_ERROR, 0, "could not find touch device "
"for device on %s.\n", common->device_path);
}
}
if (TabletHasFeature(common, WCM_ROTATION) &&
TabletHasFeature(common, WCM_RING) &&
ds.device_type == CURSOR_ID) /* I4 mouse */
{
/* convert Intuos4 mouse tilt to rotation */
ds.rotation = wcmTilt2R(ds.tiltx, ds.tilty,
INTUOS4_CURSOR_ROTATION_OFFSET);
ds.tiltx = 0;
ds.tilty = 0;
}
/* Optionally filter values only while in proximity */
if (ds.proximity && ds.device_type != PAD_ID)
{
/* Start filter fresh when entering proximity */
if (!pLast->proximity)
wcmResetSampleCounter(pChannel);
wcmFilterCoord(common,pChannel,&ds);
}
/* skip event if we don't have enough movement */
suppress = wcmCheckSuppress(common, pLast, &ds);
if (suppress == SUPPRESS_ALL)
return;
/* JEJ - Do not move this code without discussing it with me.
* The device state is invariant of any filtering performed below.
* Changing the device state after this point can and will cause
* a feedback loop resulting in oscillations, error amplification,
* unnecessary quantization, and other annoying effects. */
/* save channel device state and device to which last event went */
memmove(pChannel->valid.states + 1,
pChannel->valid.states,
sizeof(WacomDeviceState) * (common->wcmRawSample - 1));
pChannel->valid.state = ds; /*save last raw sample */
if (pChannel->nSamples < common->wcmRawSample) ++pChannel->nSamples;
if ((ds.device_type == TOUCH_ID) && common->wcmTouch)
wcmGestureFilter(priv, ds.serial_num - 1);
/* For touch, only first finger moves the cursor */
if ((common->wcmTouch && ds.device_type == TOUCH_ID && ds.serial_num == 1) ||
(ds.device_type != TOUCH_ID))
commonDispatchDevice(common,channel,pChannel, suppress);
}
/**
* Find the device the current events are meant for. If multiple tools are
* configured on this tablet, the one that matches the serial number for the
* current device state is returned. If none match, the tool that has a
* serial of 0 is returned.
*
* @param ds The current device state as read from the fd
* @return The tool that should be used to emit the current events.
*/
static WacomToolPtr findTool(const WacomCommonPtr common,
const WacomDeviceState *ds)
{
WacomToolPtr tooldefault = NULL;
WacomToolPtr tool = NULL;
/* 1: Find the tool (the one with correct serial or in second
* hand, the one with serial set to 0 if no match with the
* specified serial exists) that is used for this event */
for (tool = common->wcmTool; tool; tool = tool->next)
{
if (tool->typeid == ds->device_type)
{
if (tool->serial == ds->serial_num)
break;
else if (!tool->serial)
tooldefault = tool;
}
}
/* Use default tool (serial == 0) if no specific was found */
if (!tool)
tool = tooldefault;
return tool;
}
/**
* Return the minimum pressure based on the current minimum pressure and the
* hardware state. This is mainly to deal with the case where heavily used
* stylus may have a "pre-loaded" initial pressure. In that case, the tool
* comes into proximity with a pressure > 0 to begin with and thus offsets
* the pressure values. This preloaded pressure must be known for pressure
* normalisation to work.
*
* @param priv The wacom device
* @param ds Current device state
*
* @return The minimum pressure value for this tool.
*
* @see normalizePressure
*/
static int
rebasePressure(const WacomDevicePtr priv, const WacomDeviceState *ds)
{
int min_pressure;
/* set the minimum pressure when in prox */
if (!priv->oldProximity)
min_pressure = ds->pressure;
else
min_pressure = min(priv->minPressure, ds->pressure);
return min_pressure;
}
/**
* Instead of reporting the raw pressure, we normalize
* the pressure from 0 to FILTER_PRESSURE_RES. This is
* mainly to deal with the case where heavily used
* stylus may have a "pre-loaded" initial pressure. To
* do so, we keep the in-prox pressure and subtract it
* from the raw pressure to prevent a potential
* left-click before the pen touches the tablet.
*
* @param priv The wacom device
* @param ds Current device state
*
* @rebaes
* @see rebasePressure
*/
static int
normalizePressure(const WacomDevicePtr priv, const WacomDeviceState *ds)
{
WacomCommonPtr common = priv->common;
double pressure;
int p = ds->pressure;
if (p < priv->minPressure)
{
LogMessageVerbSigSafe(X_ERROR, 0,
"%s: Pressure %d lower than expected minimum %d. This is a bug.\n",
priv->pInfo->name, ds->pressure, priv->minPressure);
p = priv->minPressure;
}
/* normalize pressure to 0..FILTER_PRESSURE_RES */
pressure = xf86ScaleAxis(p - priv->minPressure,
FILTER_PRESSURE_RES, 0,
common->wcmMaxZ - priv->minPressure,
0);
return (int)pressure;
}
/*
* Based on the current pressure, return the button state with Button1
* either set or unset, depending on whether the pressure threshold
* conditions have been met.
*
* Returns the state of all buttons, but buttons other than button 1 are
* unmodified.
*/
static int
setPressureButton(const WacomDevicePtr priv, const WacomDeviceState *ds)
{
WacomCommonPtr common = priv->common;
int button = 1;
int buttons = ds->buttons;
/* button 1 Threshold test */
/* set button1 (left click) on/off */
if (ds->pressure < common->wcmThreshold)
{
buttons &= ~button;
if (priv->oldButtons & button) /* left click was on */
{
/* don't set it off if it is within the tolerance
and threshold is larger than the tolerance */
if ((common->wcmThreshold > THRESHOLD_TOLERANCE) &&
(ds->pressure > common->wcmThreshold - THRESHOLD_TOLERANCE))
buttons |= button;
}
}
else
buttons |= button;
return buttons;
}
static void commonDispatchDevice(WacomCommonPtr common, unsigned int channel,
const WacomChannelPtr pChannel,
enum WacomSuppressMode suppress)
{
InputInfoPtr pInfo = NULL;
WacomToolPtr tool = NULL;
WacomDeviceState* ds = &pChannel->valid.states[0];
WacomDevicePtr priv = NULL;
WacomDeviceState filtered;
/* device_type should have been retrieved and set in the respective
* models, wcmISDV4.c or wcmUSB.c. Once it comes here, something
* must have been wrong. Ignore the events.
*/
if (!ds->device_type)
{
DBG(11, common, "no device type matches with"
" serial=%u\n", ds->serial_num);
return;
}
DBG(10, common, "device type = %d\n", ds->device_type);
/* Find the device the current events are meant for */
tool = findTool(common, ds);
/* if a device matched criteria, handle filtering per device
* settings, and send event to XInput */
if (!tool || !tool->device)
{
DBG(11, common, "no device matches with"
" id=%d, serial=%u\n",
ds->device_type, ds->serial_num);
return;
}
/* Tool on the tablet when driver starts. This sometime causes
* access errors to the device */
if (!tool->enabled) {
LogMessageVerbSigSafe(X_ERROR, 0, "tool not initialized yet. Skipping event. \n");
return;
}
pInfo = tool->device;
DBG(11, common, "tool id=%d for %s\n", ds->device_type, pInfo->name);
filtered = pChannel->valid.state;
/* Device transformations come first */
priv = pInfo->private;
if (priv->serial && filtered.serial_num != priv->serial)
{
DBG(10, priv, "serial number"
" is %u but your system configured %u",
filtered.serial_num, priv->serial);
return;
}
if (TabletHasFeature(common, WCM_PENTOUCH))
{
if (IsPen(priv))
{
common->wcmTouchDevice->common->wcmPenInProx = filtered.proximity;
/* send touch out when pen coming in-prox for devices
* that provideboth pen and touch events so system
* cursor won't jump between tools.
*/
if (common->wcmTouchDevice->oldProximity)
{
common->wcmGestureMode = 0;
wcmSoftOutEvent(common->wcmTouchDevice->pInfo);
return;
}
}
else if (IsTouch(priv) && common->wcmPenInProx)
/* Ignore touch events when pen is in prox */
return;
}
if ((IsPen(priv) || IsTouch(priv)) && common->wcmMaxZ)
{
priv->minPressure = rebasePressure(priv, &filtered);
filtered.pressure = normalizePressure(priv, &filtered);
if (IsPen(priv))
filtered.buttons = setPressureButton(priv, &filtered);
filtered.pressure = applyPressureCurve(priv,&filtered);
}
else if (IsCursor(priv) && !priv->oldCursorHwProx)
{
/* initial current max distance for Intuos series */
if ((TabletHasFeature(common, WCM_ROTATION)) ||
(TabletHasFeature(common, WCM_DUALINPUT)))
common->wcmMaxCursorDist = common->wcmMaxDist;
else
common->wcmMaxCursorDist = 0;
}
/* Store cursor hardware prox for next use */
if (IsCursor(priv))
priv->oldCursorHwProx = ds->proximity;
/* User-requested filtering comes next */
/* User-requested transformations come last */
if (!is_absolute(pInfo) && !IsPad(priv))
{
/* To improve the accuracy of relative x/y,
* don't send motion event when there is no movement.
*/
double deltx = filtered.x - priv->oldX;
double delty = filtered.y - priv->oldY;
deltx *= priv->factorX;
delty *= priv->factorY;
/* less than one device coordinate movement? */
if (abs(deltx)<1 && abs(delty)<1)
{
/* We have no other data in this event, skip */
if (suppress == SUPPRESS_NON_MOTION)
{
DBG(10, common, "Ignore non-movement relative data \n");
return;
}
/* send other events, such as button/wheel */
filtered.x = priv->oldX;
filtered.y = priv->oldY;
}
}
/* force out-prox when distance is outside wcmCursorProxoutDist for pucks */
if (IsCursor(priv))
{
if (common->wcmProtocolLevel == WCM_PROTOCOL_5)
{
/* protocol 5 distance starts from the MaxDist
* when getting in the prox.
*/
if (common->wcmMaxCursorDist > filtered.distance)
common->wcmMaxCursorDist = filtered.distance;
}
else
{
/* protocol 4 distance is 0 when getting in the prox */
if (common->wcmMaxCursorDist < filtered.distance)
common->wcmMaxCursorDist = filtered.distance;
}
DBG(10, common, "Distance over"
" the tablet: %d, ProxoutDist: %d current"
" min/max %d hard prox: %d\n",
filtered.distance,
common->wcmCursorProxoutDist,
common->wcmMaxCursorDist,
ds->proximity);
if (priv->oldProximity)
{
if (abs(filtered.distance - common->wcmMaxCursorDist)
> common->wcmCursorProxoutDist)
filtered.proximity = 0;
}
/* once it is out. Don't let it in until a hard in */
/* or it gets inside wcmCursorProxoutDist */
else
{
if (abs(filtered.distance - common->wcmMaxCursorDist) >
common->wcmCursorProxoutDist && ds->proximity)
return;
if (!ds->proximity)
return;
}
}
wcmSendEvents(pInfo, &filtered);
}
/*****************************************************************************
* wcmInitTablet -- common initialization for all tablets
****************************************************************************/
int wcmInitTablet(InputInfoPtr pInfo, const char* id, float version)
{
WacomDevicePtr priv = (WacomDevicePtr)pInfo->private;
WacomCommonPtr common = priv->common;
WacomModelPtr model = common->wcmModel;
/* Initialize the tablet */
model->Initialize(common,id,version);
/* Get tablet resolution */
if (model->GetResolution)
model->GetResolution(pInfo);
/* Get tablet range */
if (model->GetRanges && (model->GetRanges(pInfo) != Success))
return !Success;
/* Default threshold value if not set */
if (common->wcmThreshold <= 0)
{
/* Threshold for counting pressure as a button */
common->wcmThreshold = DEFAULT_THRESHOLD;
xf86Msg(X_PROBED, "%s: using pressure threshold of %d for button 1\n",
pInfo->name, common->wcmThreshold);
}
/* output tablet state as probed */
if (TabletHasFeature(common, WCM_PEN))
xf86Msg(X_PROBED, "%s: Wacom %s tablet maxX=%d maxY=%d maxZ=%d "
"resX=%d resY=%d tilt=%s\n",
pInfo->name,
model->name,
common->wcmMaxX, common->wcmMaxY, common->wcmMaxZ,
common->wcmResolX, common->wcmResolY,
HANDLE_TILT(common) ? "enabled" : "disabled");
else
xf86Msg(X_PROBED, "%s: Wacom %s tablet maxX=%d maxY=%d maxZ=%d "
"resX=%d resY=%d \n",
pInfo->name,
model->name,
common->wcmMaxTouchX, common->wcmMaxTouchY,
common->wcmMaxZ,
common->wcmTouchResolX, common->wcmTouchResolY);
return Success;
}
/* Send a soft prox-out event for the device */
void wcmSoftOutEvent(InputInfoPtr pInfo)
{
WacomDeviceState out = { 0 };
WacomDevicePtr priv = (WacomDevicePtr) pInfo->private;
out.device_type = DEVICE_ID(priv->flags);
out.device_id = wcmGetPhyDeviceID(priv);
DBG(2, priv->common, "send a soft prox-out\n");
wcmSendEvents(pInfo, &out);
}
/*****************************************************************************
** Transformations
*****************************************************************************/
/**
* Apply the current pressure curve to the current pressure.
*
* @return The modified pressure value.
*/
static int applyPressureCurve(WacomDevicePtr pDev, const WacomDeviceStatePtr pState)
{
/* clip the pressure */
int p = max(0, pState->pressure);
p = min(FILTER_PRESSURE_RES, p);
/* apply pressure curve function */
return pDev->pPressCurve[p];
}
/*****************************************************************************
* wcmRotateTablet
****************************************************************************/
void wcmRotateTablet(InputInfoPtr pInfo, int value)
{
WacomDevicePtr priv = (WacomDevicePtr)pInfo->private;
WacomCommonPtr common = priv->common;
WacomToolPtr tool;
DBG(10, priv, "\n");
common->wcmRotate = value;
/* Only try updating properties once we're enabled, no point
* otherwise. */
tool = priv->tool;
if (tool->enabled)
wcmUpdateRotationProperty(priv);
}
/* Common pointer refcounting utilities.
* Common is shared across all wacom devices off the same port. These
* functions implement basic refcounting to avoid double-frees and memleaks.
*
* Usage:
* wcmNewCommon() to create a new struct.
* wcmRefCommon() to get a new reference to an already exiting one.
* wcmFreeCommon() to unref. After the last ref has been unlinked, the
* struct is freed.
*
*/
WacomCommonPtr wcmNewCommon(void)
{
WacomCommonPtr common;
common = calloc(1, sizeof(WacomCommonRec));
if (!common)
return NULL;;
common->refcnt = 1;
common->wcmFlags = 0; /* various flags */
common->wcmProtocolLevel = WCM_PROTOCOL_4; /* protocol level */
common->wcmTPCButton = 0; /* set Tablet PC button on/off */
common->wcmGestureParameters.wcmScrollDirection = 0;
common->wcmGestureParameters.wcmTapTime = 250;
common->wcmRotate = ROTATE_NONE; /* default tablet rotation to off */
common->wcmMaxX = 0; /* max digitizer logical X value */
common->wcmMaxY = 0; /* max digitizer logical Y value */
common->wcmMaxTouchX = 1024; /* max touch X value */
common->wcmMaxTouchY = 1024; /* max touch Y value */
common->wcmMaxStripX = 4096; /* Max fingerstrip X */
common->wcmMaxStripY = 4096; /* Max fingerstrip Y */
common->wcmCursorProxoutDistDefault = PROXOUT_INTUOS_DISTANCE;
/* default to Intuos */
common->wcmSuppress = DEFAULT_SUPPRESS;
/* transmit position if increment is superior */
common->wcmRawSample = DEFAULT_SAMPLES;
/* number of raw data to be used to for filtering */
return common;
}
void wcmFreeCommon(WacomCommonPtr *ptr)
{
WacomCommonPtr common = *ptr;
DBG(10, common, "common refcount dec to %d\n", common->refcnt - 1);
if (--common->refcnt == 0)
{
free(common->private);
while (common->serials)
{
WacomToolPtr next;
DBG(10, common, "Free common serial: %d %s\n",
common->serials->serial,
common->serials->name);
next = common->serials->next;
free(common->serials);
common->serials = next;
}
free(common);
}
*ptr = NULL;
}
WacomCommonPtr wcmRefCommon(WacomCommonPtr common)
{
if (!common)
common = wcmNewCommon();
else
common->refcnt++;
DBG(10, common, "common refcount inc to %d\n", common->refcnt);
return common;
}
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