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getevents.c
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/*
* Copyright © 2006 Nokia Corporation
* Copyright © 2006-2007 Daniel Stone
* Copyright © 2008 Red Hat, Inc.
* Copyright © 2011 The Chromium Authors
*
* 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:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors: Daniel Stone <[email protected]>
* Peter Hutterer <[email protected]>
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <X11/X.h>
#include <X11/keysym.h>
#include <X11/Xproto.h>
#include <math.h>
#include <limits.h>
#include "misc.h"
#include "resource.h"
#include "inputstr.h"
#include "scrnintstr.h"
#include "cursorstr.h"
#include "dixstruct.h"
#include "globals.h"
#include "dixevents.h"
#include "mipointer.h"
#include "eventstr.h"
#include "eventconvert.h"
#include "inpututils.h"
#include "mi.h"
#include "windowstr.h"
#include <X11/extensions/XKBproto.h>
#include "xkbsrv.h"
#ifdef PANORAMIX
#include "panoramiX.h"
#include "panoramiXsrv.h"
#endif
#include <X11/extensions/XI.h>
#include <X11/extensions/XI2.h>
#include <X11/extensions/XIproto.h>
#include <pixman.h>
#include "exglobals.h"
#include "exevents.h"
#include "extnsionst.h"
#include "listdev.h" /* for sizing up DeviceClassesChangedEvent */
#include "probes.h"
/* Number of motion history events to store. */
#define MOTION_HISTORY_SIZE 256
/**
* InputEventList is the storage for input events generated by
* QueuePointerEvents, QueueKeyboardEvents, and QueueProximityEvents.
* This list is allocated on startup by the DIX.
*/
InternalEvent *InputEventList = NULL;
/**
* Pick some arbitrary size for Xi motion history.
*/
int
GetMotionHistorySize(void)
{
return MOTION_HISTORY_SIZE;
}
void
set_button_down(DeviceIntPtr pDev, int button, int type)
{
if (type == BUTTON_PROCESSED)
SetBit(pDev->button->down, button);
else
SetBit(pDev->button->postdown, button);
}
void
set_button_up(DeviceIntPtr pDev, int button, int type)
{
if (type == BUTTON_PROCESSED)
ClearBit(pDev->button->down, button);
else
ClearBit(pDev->button->postdown, button);
}
Bool
button_is_down(DeviceIntPtr pDev, int button, int type)
{
Bool ret = FALSE;
if (type & BUTTON_PROCESSED)
ret = ret || BitIsOn(pDev->button->down, button);
if (type & BUTTON_POSTED)
ret = ret || BitIsOn(pDev->button->postdown, button);
return ret;
}
void
set_key_down(DeviceIntPtr pDev, int key_code, int type)
{
if (type == KEY_PROCESSED)
SetBit(pDev->key->down, key_code);
else
SetBit(pDev->key->postdown, key_code);
}
void
set_key_up(DeviceIntPtr pDev, int key_code, int type)
{
if (type == KEY_PROCESSED)
ClearBit(pDev->key->down, key_code);
else
ClearBit(pDev->key->postdown, key_code);
}
Bool
key_is_down(DeviceIntPtr pDev, int key_code, int type)
{
Bool ret = FALSE;
if (type & KEY_PROCESSED)
ret = ret || BitIsOn(pDev->key->down, key_code);
if (type & KEY_POSTED)
ret = ret || BitIsOn(pDev->key->postdown, key_code);
return ret;
}
static Bool
key_autorepeats(DeviceIntPtr pDev, int key_code)
{
return ! !(pDev->kbdfeed->ctrl.autoRepeats[key_code >> 3] &
(1 << (key_code & 7)));
}
static void
init_touch_ownership(DeviceIntPtr dev, TouchOwnershipEvent *event, Time ms)
{
memset(event, 0, sizeof(TouchOwnershipEvent));
event->header = ET_Internal;
event->type = ET_TouchOwnership;
event->length = sizeof(TouchOwnershipEvent);
event->time = ms;
event->deviceid = dev->id;
}
static void
init_raw(DeviceIntPtr dev, RawDeviceEvent *event, Time ms, int type, int detail)
{
memset(event, 0, sizeof(RawDeviceEvent));
event->header = ET_Internal;
event->length = sizeof(RawDeviceEvent);
switch (type) {
case MotionNotify:
event->type = ET_RawMotion;
break;
case ButtonPress:
event->type = ET_RawButtonPress;
break;
case ButtonRelease:
event->type = ET_RawButtonRelease;
break;
case KeyPress:
event->type = ET_RawKeyPress;
break;
case KeyRelease:
event->type = ET_RawKeyRelease;
break;
case XI_TouchBegin:
event->type = ET_RawTouchBegin;
break;
case XI_TouchUpdate:
event->type = ET_RawTouchUpdate;
break;
case XI_TouchEnd:
event->type = ET_RawTouchEnd;
break;
}
event->time = ms;
event->deviceid = dev->id;
event->sourceid = dev->id;
event->detail.button = detail;
}
static void
set_raw_valuators(RawDeviceEvent *event, ValuatorMask *mask,
BOOL use_unaccel, double *data)
{
int i;
use_unaccel = use_unaccel && valuator_mask_has_unaccelerated(mask);
for (i = 0; i < valuator_mask_size(mask); i++) {
if (valuator_mask_isset(mask, i)) {
double v;
SetBit(event->valuators.mask, i);
if (use_unaccel)
v = valuator_mask_get_unaccelerated(mask, i);
else
v = valuator_mask_get_double(mask, i);
data[i] = v;
}
}
}
static void
set_valuators(DeviceIntPtr dev, DeviceEvent *event, ValuatorMask *mask)
{
int i;
/* Set the data to the previous value for unset absolute axes. The values
* may be used when sent as part of an XI 1.x valuator event. */
for (i = 0; i < valuator_mask_size(mask); i++) {
if (valuator_mask_isset(mask, i)) {
SetBit(event->valuators.mask, i);
if (valuator_get_mode(dev, i) == Absolute)
SetBit(event->valuators.mode, i);
event->valuators.data[i] = valuator_mask_get_double(mask, i);
}
else
event->valuators.data[i] = dev->valuator->axisVal[i];
}
}
void
CreateClassesChangedEvent(InternalEvent *event,
DeviceIntPtr master, DeviceIntPtr slave, int flags)
{
int i;
DeviceChangedEvent *dce;
CARD32 ms = GetTimeInMillis();
dce = &event->changed_event;
memset(dce, 0, sizeof(DeviceChangedEvent));
dce->deviceid = slave->id;
dce->masterid = master ? master->id : 0;
dce->header = ET_Internal;
dce->length = sizeof(DeviceChangedEvent);
dce->type = ET_DeviceChanged;
dce->time = ms;
dce->flags = flags;
dce->sourceid = slave->id;
if (slave->button) {
dce->buttons.num_buttons = slave->button->numButtons;
for (i = 0; i < dce->buttons.num_buttons; i++)
dce->buttons.names[i] = slave->button->labels[i];
}
if (slave->valuator) {
dce->num_valuators = slave->valuator->numAxes;
for (i = 0; i < dce->num_valuators; i++) {
dce->valuators[i].min = slave->valuator->axes[i].min_value;
dce->valuators[i].max = slave->valuator->axes[i].max_value;
dce->valuators[i].resolution = slave->valuator->axes[i].resolution;
dce->valuators[i].mode = slave->valuator->axes[i].mode;
dce->valuators[i].name = slave->valuator->axes[i].label;
dce->valuators[i].scroll = slave->valuator->axes[i].scroll;
dce->valuators[i].value = slave->valuator->axisVal[i];
}
}
if (slave->key) {
dce->keys.min_keycode = slave->key->xkbInfo->desc->min_key_code;
dce->keys.max_keycode = slave->key->xkbInfo->desc->max_key_code;
}
}
/**
* Rescale the coord between the two axis ranges.
*/
static double
rescaleValuatorAxis(double coord, AxisInfoPtr from, AxisInfoPtr to,
double defmin, double defmax)
{
double fmin = defmin, fmax = defmax;
double tmin = defmin, tmax = defmax;
if (from && from->min_value < from->max_value) {
fmin = from->min_value;
fmax = from->max_value + 1;
}
if (to && to->min_value < to->max_value) {
tmin = to->min_value;
tmax = to->max_value + 1;
}
if (fmin == tmin && fmax == tmax)
return coord;
if (fmax == fmin) /* avoid division by 0 */
return 0.0;
return (coord - fmin) * (tmax - tmin) / (fmax - fmin) + tmin;
}
/**
* Update all coordinates when changing to a different SD
* to ensure that relative reporting will work as expected
* without loss of precision.
*
* pDev->last.valuators will be in absolute device coordinates after this
* function.
*/
static void
updateSlaveDeviceCoords(DeviceIntPtr master, DeviceIntPtr pDev)
{
/* master->last.valuators[0]/[1] is in desktop-wide coords and the actual
* position of the pointer */
pDev->last.valuators[0] = master->last.valuators[0];
pDev->last.valuators[1] = master->last.valuators[1];
if (!pDev->valuator)
return;
/* scale back to device coordinates */
if (pDev->valuator->numAxes > 0) {
pDev->last.valuators[0] = rescaleValuatorAxis(pDev->last.valuators[0],
NULL,
pDev->valuator->axes + 0,
screenInfo.x,
screenInfo.width);
}
if (pDev->valuator->numAxes > 1) {
pDev->last.valuators[1] = rescaleValuatorAxis(pDev->last.valuators[1],
NULL,
pDev->valuator->axes + 1,
screenInfo.y,
screenInfo.height);
}
/* other axes are left as-is */
}
/**
* Allocate the motion history buffer.
*/
void
AllocateMotionHistory(DeviceIntPtr pDev)
{
int size;
free(pDev->valuator->motion);
if (pDev->valuator->numMotionEvents < 1)
return;
/* An MD must have a motion history size large enough to keep all
* potential valuators, plus the respective range of the valuators.
* 3 * INT32 for (min_val, max_val, curr_val))
*/
if (IsMaster(pDev))
size = sizeof(INT32) * 3 * MAX_VALUATORS;
else {
ValuatorClassPtr v = pDev->valuator;
int numAxes;
/* XI1 doesn't understand mixed mode devices */
for (numAxes = 0; numAxes < v->numAxes; numAxes++)
if (valuator_get_mode(pDev, numAxes) != valuator_get_mode(pDev, 0))
break;
size = sizeof(INT32) * numAxes;
}
size += sizeof(Time);
pDev->valuator->motion = calloc(pDev->valuator->numMotionEvents, size);
pDev->valuator->first_motion = 0;
pDev->valuator->last_motion = 0;
if (!pDev->valuator->motion)
ErrorF("[dix] %s: Failed to alloc motion history (%d bytes).\n",
pDev->name, size * pDev->valuator->numMotionEvents);
}
/**
* Dump the motion history between start and stop into the supplied buffer.
* Only records the event for a given screen in theory, but in practice, we
* sort of ignore this.
*
* If core is set, we only generate x/y, in INT16, scaled to screen coords.
*/
int
GetMotionHistory(DeviceIntPtr pDev, xTimecoord ** buff, unsigned long start,
unsigned long stop, ScreenPtr pScreen, BOOL core)
{
char *ibuff = NULL, *obuff;
int i = 0, ret = 0;
int j, coord;
Time current;
/* The size of a single motion event. */
int size;
AxisInfo from, *to; /* for scaling */
INT32 *ocbuf, *icbuf; /* pointer to coordinates for copying */
INT16 *corebuf;
AxisInfo core_axis = { 0 };
if (!pDev->valuator || !pDev->valuator->numMotionEvents)
return 0;
if (core && !pScreen)
return 0;
if (IsMaster(pDev))
size = (sizeof(INT32) * 3 * MAX_VALUATORS) + sizeof(Time);
else
size = (sizeof(INT32) * pDev->valuator->numAxes) + sizeof(Time);
*buff = malloc(size * pDev->valuator->numMotionEvents);
if (!(*buff))
return 0;
obuff = (char *) *buff;
for (i = pDev->valuator->first_motion;
i != pDev->valuator->last_motion;
i = (i + 1) % pDev->valuator->numMotionEvents) {
/* We index the input buffer by which element we're accessing, which
* is not monotonic, and the output buffer by how many events we've
* written so far. */
ibuff = (char *) pDev->valuator->motion + (i * size);
memcpy(¤t, ibuff, sizeof(Time));
if (current > stop) {
return ret;
}
else if (current >= start) {
if (core) {
memcpy(obuff, ibuff, sizeof(Time)); /* copy timestamp */
icbuf = (INT32 *) (ibuff + sizeof(Time));
corebuf = (INT16 *) (obuff + sizeof(Time));
/* fetch x coordinate + range */
memcpy(&from.min_value, icbuf++, sizeof(INT32));
memcpy(&from.max_value, icbuf++, sizeof(INT32));
memcpy(&coord, icbuf++, sizeof(INT32));
/* scale to screen coords */
to = &core_axis;
to->max_value = pScreen->width;
coord =
rescaleValuatorAxis(coord, &from, to, 0, pScreen->width);
memcpy(corebuf, &coord, sizeof(INT16));
corebuf++;
/* fetch y coordinate + range */
memcpy(&from.min_value, icbuf++, sizeof(INT32));
memcpy(&from.max_value, icbuf++, sizeof(INT32));
memcpy(&coord, icbuf++, sizeof(INT32));
to->max_value = pScreen->height;
coord =
rescaleValuatorAxis(coord, &from, to, 0, pScreen->height);
memcpy(corebuf, &coord, sizeof(INT16));
}
else if (IsMaster(pDev)) {
memcpy(obuff, ibuff, sizeof(Time)); /* copy timestamp */
ocbuf = (INT32 *) (obuff + sizeof(Time));
icbuf = (INT32 *) (ibuff + sizeof(Time));
for (j = 0; j < MAX_VALUATORS; j++) {
if (j >= pDev->valuator->numAxes)
break;
/* fetch min/max/coordinate */
memcpy(&from.min_value, icbuf++, sizeof(INT32));
memcpy(&from.max_value, icbuf++, sizeof(INT32));
memcpy(&coord, icbuf++, sizeof(INT32));
to = (j <
pDev->valuator->numAxes) ? &pDev->valuator->
axes[j] : NULL;
/* x/y scaled to screen if no range is present */
if (j == 0 && (from.max_value < from.min_value))
from.max_value = pScreen->width;
else if (j == 1 && (from.max_value < from.min_value))
from.max_value = pScreen->height;
/* scale from stored range into current range */
coord = rescaleValuatorAxis(coord, &from, to, 0, 0);
memcpy(ocbuf, &coord, sizeof(INT32));
ocbuf++;
}
}
else
memcpy(obuff, ibuff, size);
/* don't advance by size here. size may be different to the
* actually written size if the MD has less valuators than MAX */
if (core)
obuff += sizeof(INT32) + sizeof(Time);
else
obuff +=
(sizeof(INT32) * pDev->valuator->numAxes) + sizeof(Time);
ret++;
}
}
return ret;
}
/**
* Update the motion history for a specific device, with the list of
* valuators.
*
* Layout of the history buffer:
* for SDs: [time] [val0] [val1] ... [valn]
* for MDs: [time] [min_val0] [max_val0] [val0] [min_val1] ... [valn]
*
* For events that have some valuators unset:
* min_val == max_val == val == 0.
*/
static void
updateMotionHistory(DeviceIntPtr pDev, CARD32 ms, ValuatorMask *mask,
double *valuators)
{
char *buff = (char *) pDev->valuator->motion;
ValuatorClassPtr v;
int i;
if (!pDev->valuator->numMotionEvents)
return;
v = pDev->valuator;
if (IsMaster(pDev)) {
buff += ((sizeof(INT32) * 3 * MAX_VALUATORS) + sizeof(CARD32)) *
v->last_motion;
memcpy(buff, &ms, sizeof(Time));
buff += sizeof(Time);
memset(buff, 0, sizeof(INT32) * 3 * MAX_VALUATORS);
for (i = 0; i < v->numAxes; i++) {
int val;
/* XI1 doesn't support mixed mode devices */
if (valuator_get_mode(pDev, i) != valuator_get_mode(pDev, 0))
break;
if (valuator_mask_size(mask) <= i || !valuator_mask_isset(mask, i)) {
buff += 3 * sizeof(INT32);
continue;
}
memcpy(buff, &v->axes[i].min_value, sizeof(INT32));
buff += sizeof(INT32);
memcpy(buff, &v->axes[i].max_value, sizeof(INT32));
buff += sizeof(INT32);
val = valuators[i];
memcpy(buff, &val, sizeof(INT32));
buff += sizeof(INT32);
}
}
else {
buff += ((sizeof(INT32) * pDev->valuator->numAxes) + sizeof(CARD32)) *
pDev->valuator->last_motion;
memcpy(buff, &ms, sizeof(Time));
buff += sizeof(Time);
memset(buff, 0, sizeof(INT32) * pDev->valuator->numAxes);
for (i = 0; i < MAX_VALUATORS; i++) {
int val;
if (valuator_mask_size(mask) <= i || !valuator_mask_isset(mask, i)) {
buff += sizeof(INT32);
continue;
}
val = valuators[i];
memcpy(buff, &val, sizeof(INT32));
buff += sizeof(INT32);
}
}
pDev->valuator->last_motion = (pDev->valuator->last_motion + 1) %
pDev->valuator->numMotionEvents;
/* If we're wrapping around, just keep the circular buffer going. */
if (pDev->valuator->first_motion == pDev->valuator->last_motion)
pDev->valuator->first_motion = (pDev->valuator->first_motion + 1) %
pDev->valuator->numMotionEvents;
return;
}
/**
* Returns the maximum number of events GetKeyboardEvents
* and GetPointerEvents will ever return.
*
* This MUST be absolutely constant, from init until exit.
*/
int
GetMaximumEventsNum(void)
{
/* One raw event
* One device event
* One possible device changed event
* Lots of possible separate button scroll events (horiz + vert)
* Lots of possible separate raw button scroll events (horiz + vert)
*/
return 100;
}
/**
* Clip an axis to its bounds, which are declared in the call to
* InitValuatorAxisClassStruct.
*/
static void
clipAxis(DeviceIntPtr pDev, int axisNum, double *val)
{
AxisInfoPtr axis;
if (axisNum >= pDev->valuator->numAxes)
return;
axis = pDev->valuator->axes + axisNum;
/* If a value range is defined, clip. If not, do nothing */
if (axis->max_value <= axis->min_value)
return;
if (*val < axis->min_value)
*val = axis->min_value;
if (*val > axis->max_value)
*val = axis->max_value;
}
/**
* Clip every axis in the list of valuators to its bounds.
*/
static void
clipValuators(DeviceIntPtr pDev, ValuatorMask *mask)
{
int i;
for (i = 0; i < valuator_mask_size(mask); i++)
if (valuator_mask_isset(mask, i)) {
double val = valuator_mask_get_double(mask, i);
clipAxis(pDev, i, &val);
valuator_mask_set_double(mask, i, val);
}
}
/**
* Create the DCCE event (does not update the master's device state yet, this
* is done in the event processing).
* Pull in the coordinates from the MD if necessary.
*
* @param events Pointer to a pre-allocated event array.
* @param dev The slave device that generated an event.
* @param type Either DEVCHANGE_POINTER_EVENT and/or DEVCHANGE_KEYBOARD_EVENT
* @param num_events The current number of events, returns the number of
* events if a DCCE was generated.
* @return The updated @events pointer.
*/
InternalEvent *
UpdateFromMaster(InternalEvent *events, DeviceIntPtr dev, int type,
int *num_events)
{
DeviceIntPtr master;
master =
GetMaster(dev,
(type & DEVCHANGE_POINTER_EVENT) ? MASTER_POINTER :
MASTER_KEYBOARD);
if (master && master->last.slave != dev) {
CreateClassesChangedEvent(events, master, dev,
type | DEVCHANGE_SLAVE_SWITCH);
if (IsPointerDevice(master)) {
updateSlaveDeviceCoords(master, dev);
master->last.numValuators = dev->last.numValuators;
}
master->last.slave = dev;
(*num_events)++;
events++;
}
return events;
}
/**
* Move the device's pointer to the position given in the valuators.
*
* @param dev The device whose pointer is to be moved.
* @param mask Valuator data for this event.
*/
static void
clipAbsolute(DeviceIntPtr dev, ValuatorMask *mask)
{
int i;
for (i = 0; i < valuator_mask_size(mask); i++) {
double val;
if (!valuator_mask_isset(mask, i))
continue;
val = valuator_mask_get_double(mask, i);
clipAxis(dev, i, &val);
valuator_mask_set_double(mask, i, val);
}
}
static void
add_to_scroll_valuator(DeviceIntPtr dev, ValuatorMask *mask, int valuator, double value)
{
double v;
if (!valuator_mask_fetch_double(mask, valuator, &v))
return;
/* protect against scrolling overflow. INT_MAX for double, because
* we'll eventually write this as 32.32 fixed point */
if ((value > 0 && v > INT_MAX - value) || (value < 0 && v < INT_MIN - value)) {
v = 0;
/* reset last.scroll to avoid a button storm */
valuator_mask_set_double(dev->last.scroll, valuator, 0);
}
else
v += value;
valuator_mask_set_double(mask, valuator, v);
}
static void
scale_for_device_resolution(DeviceIntPtr dev, ValuatorMask *mask)
{
double y;
ValuatorClassPtr v = dev->valuator;
int xrange = v->axes[0].max_value - v->axes[0].min_value + 1;
int yrange = v->axes[1].max_value - v->axes[1].min_value + 1;
double screen_ratio = 1.0 * screenInfo.width/screenInfo.height;
double device_ratio = 1.0 * xrange/yrange;
double resolution_ratio = 1.0;
double ratio;
if (!valuator_mask_fetch_double(mask, 1, &y))
return;
if (v->axes[0].resolution != 0 && v->axes[1].resolution != 0)
resolution_ratio = 1.0 * v->axes[0].resolution/v->axes[1].resolution;
ratio = device_ratio/resolution_ratio/screen_ratio;
valuator_mask_set_double(mask, 1, y / ratio);
}
/**
* Move the device's pointer by the values given in @valuators.
*
* @param dev The device whose pointer is to be moved.
* @param[in,out] mask Valuator data for this event, modified in-place.
*/
static void
moveRelative(DeviceIntPtr dev, int flags, ValuatorMask *mask)
{
int i;
Bool clip_xy = IsMaster(dev) || !IsFloating(dev);
ValuatorClassPtr v = dev->valuator;
/* for abs devices in relative mode, we've just scaled wrong, since we
mapped the device's shape into the screen shape. Undo this. */
if ((flags & POINTER_ABSOLUTE) == 0 && v && v->numAxes > 1 &&
v->axes[0].min_value < v->axes[0].max_value &&
v->axes[1].min_value < v->axes[1].max_value) {
scale_for_device_resolution(dev, mask);
}
/* calc other axes, clip, drop back into valuators */
for (i = 0; i < valuator_mask_size(mask); i++) {
double val = dev->last.valuators[i];
if (!valuator_mask_isset(mask, i))
continue;
add_to_scroll_valuator(dev, mask, i, val);
/* x & y need to go over the limits to cross screens if the SD
* isn't currently attached; otherwise, clip to screen bounds. */
if (valuator_get_mode(dev, i) == Absolute &&
((i != 0 && i != 1) || clip_xy)) {
val = valuator_mask_get_double(mask, i);
clipAxis(dev, i, &val);
valuator_mask_set_double(mask, i, val);
}
}
}
/**
* Accelerate the data in valuators based on the device's acceleration scheme.
*
* @param dev The device which's pointer is to be moved.
* @param valuators Valuator mask
* @param ms Current time.
*/
static void
accelPointer(DeviceIntPtr dev, ValuatorMask *valuators, CARD32 ms)
{
if (dev->valuator->accelScheme.AccelSchemeProc)
dev->valuator->accelScheme.AccelSchemeProc(dev, valuators, ms);
}
/**
* Scale from absolute screen coordinates to absolute coordinates in the
* device's coordinate range.
*
* @param dev The device to scale for.
* @param[in, out] mask The mask in desktop/screen coordinates, modified in place
* to contain device coordinate range.
* @param flags If POINTER_SCREEN is set, mask is in per-screen coordinates.
* Otherwise, mask is in desktop coords.
*/
static void
scale_from_screen(DeviceIntPtr dev, ValuatorMask *mask, int flags)
{
double scaled;
ScreenPtr scr = miPointerGetScreen(dev);
if (valuator_mask_isset(mask, 0)) {
scaled = valuator_mask_get_double(mask, 0);
if (flags & POINTER_SCREEN)
scaled += scr->x;
scaled = rescaleValuatorAxis(scaled,
NULL, dev->valuator->axes + 0,
screenInfo.x, screenInfo.width);
valuator_mask_set_double(mask, 0, scaled);
}
if (valuator_mask_isset(mask, 1)) {
scaled = valuator_mask_get_double(mask, 1);
if (flags & POINTER_SCREEN)
scaled += scr->y;
scaled = rescaleValuatorAxis(scaled,
NULL, dev->valuator->axes + 1,
screenInfo.y, screenInfo.height);
valuator_mask_set_double(mask, 1, scaled);
}
}
/**
* Scale from (absolute) device to screen coordinates here,
*
* The coordinates provided are always absolute. see fill_pointer_events for
* information on coordinate systems.
*
* @param dev The device to be moved.
* @param mask Mask of axis values for this event
* @param[out] devx x desktop-wide coordinate in device coordinate system
* @param[out] devy y desktop-wide coordinate in device coordinate system
* @param[out] screenx x coordinate in desktop coordinate system
* @param[out] screeny y coordinate in desktop coordinate system
*/
static ScreenPtr
scale_to_desktop(DeviceIntPtr dev, ValuatorMask *mask,
double *devx, double *devy, double *screenx, double *screeny)
{
ScreenPtr scr = miPointerGetScreen(dev);
double x, y;
BUG_WARN(dev->valuator && dev->valuator->numAxes < 2);
if (!dev->valuator || dev->valuator->numAxes < 2) {
/* if we have no axes, last.valuators must be in screen coords
* anyway */
*devx = *screenx = dev->last.valuators[0];
*devy = *screeny = dev->last.valuators[1];
return scr;
}
if (valuator_mask_isset(mask, 0))
x = valuator_mask_get_double(mask, 0);
else
x = dev->last.valuators[0];
if (valuator_mask_isset(mask, 1))
y = valuator_mask_get_double(mask, 1);
else
y = dev->last.valuators[1];
/* scale x&y to desktop coordinates */
*screenx = rescaleValuatorAxis(x, dev->valuator->axes + 0, NULL,
screenInfo.x, screenInfo.width);
*screeny = rescaleValuatorAxis(y, dev->valuator->axes + 1, NULL,
screenInfo.y, screenInfo.height);
*devx = x;
*devy = y;
return scr;
}
/**
* If we have HW cursors, this actually moves the visible sprite. If not, we
* just do all the screen crossing, etc.
*
* We use the screen coordinates here, call miPointerSetPosition() and then
* scale back into device coordinates (if needed). miPSP will change x/y if
* the screen was crossed.
*
* The coordinates provided are always absolute. The parameter mode
* specifies whether it was relative or absolute movement that landed us at
* those coordinates. see fill_pointer_events for information on coordinate
* systems.
*
* @param dev The device to be moved.
* @param mode Movement mode (Absolute or Relative)
* @param[out] mask Mask of axis values for this event, returns the
* per-screen device coordinates after confinement
* @param[in,out] devx x desktop-wide coordinate in device coordinate system
* @param[in,out] devy y desktop-wide coordinate in device coordinate system
* @param[in,out] screenx x coordinate in desktop coordinate system
* @param[in,out] screeny y coordinate in desktop coordinate system
* @param[out] nevents Number of barrier events added to events
* @param[in,out] events List of events barrier events are added to
*/
static ScreenPtr
positionSprite(DeviceIntPtr dev, int mode, ValuatorMask *mask,
double *devx, double *devy, double *screenx, double *screeny,
int *nevents, InternalEvent* events)
{
ScreenPtr scr = miPointerGetScreen(dev);
double tmpx, tmpy;
if (!dev->valuator || dev->valuator->numAxes < 2)
return scr;
tmpx = *screenx;
tmpy = *screeny;
/* miPointerSetPosition takes care of crossing screens for us, as well as
* clipping to the current screen. Coordinates returned are in desktop
* coord system */
scr = miPointerSetPosition(dev, mode, screenx, screeny, nevents, events);
/* If we were constrained, rescale x/y from the screen coordinates so
* the device valuators reflect the correct position. For screen
* crossing this doesn't matter much, the coords would be 0 or max.
*/
if (tmpx != *screenx)
*devx = rescaleValuatorAxis(*screenx, NULL, dev->valuator->axes + 0,
screenInfo.x, screenInfo.width);
if (tmpy != *screeny)
*devy = rescaleValuatorAxis(*screeny, NULL, dev->valuator->axes + 1,
screenInfo.y, screenInfo.height);
/* Recalculate the per-screen device coordinates */
if (valuator_mask_isset(mask, 0)) {
double x;
x = rescaleValuatorAxis(*screenx - scr->x, NULL,
dev->valuator->axes + 0, 0, scr->width);
valuator_mask_set_double(mask, 0, x);
}
if (valuator_mask_isset(mask, 1)) {
double y;
y = rescaleValuatorAxis(*screeny - scr->y, NULL,
dev->valuator->axes + 1, 0, scr->height);
valuator_mask_set_double(mask, 1, y);
}
return scr;
}
/**
* Update the motion history for the device and (if appropriate) for its
* master device.
* @param dev Slave device to update.
* @param mask Bit mask of valid valuators to append to history.
* @param num Total number of valuators to append to history.
* @param ms Current time