xserver libXdmcp git update 16-12-2010

1 files changed, 1323 insertions, 1309 deletions

diff --git a/xorg-server/dix/getevents.c b/xorg-server/dix/getevents.c
index 96b5ce29c..794df420b 100644
--- a/xorg-server/dix/getevents.c
+++ b/xorg-server/dix/getevents.c
@@ -1,1309 +1,1323 @@
-/*

- * Copyright © 2006 Nokia Corporation

- * Copyright © 2006-2007 Daniel Stone

- * Copyright © 2008 Red Hat, Inc.

- *

- * 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 <daniel@fooishbar.org>

- *          Peter Hutterer <peter.hutterer@who-t.net>

- */

-

-#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 "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 <X11/extensions/XKBproto.h>

-#include "xkbsrv.h"

-

-#ifdef PANORAMIX

-#include "panoramiX.h"

-#include "panoramiXsrv.h"

-#endif

-

-#include <X11/extensions/XI.h>

-#include <X11/extensions/XIproto.h>

-#include <pixman.h>

-#include "exglobals.h"

-#include "exevents.h"

-#include "exglobals.h"

-#include "extnsionst.h"

-#include "listdev.h" /* for sizing up DeviceClassesChangedEvent */

-

-/* Number of motion history events to store. */

-#define MOTION_HISTORY_SIZE 256

-

-/* InputEventList is the container list for all input events generated by the

- * DDX. The DDX is expected to call GetEventList() and then pass the list into

- * Get{Pointer|Keyboard}Events.

- */

-EventListPtr InputEventList = NULL;

-int InputEventListLen = 0;

-

-int

-GetEventList(EventListPtr* list)

-{

-    *list = InputEventList;

-    return InputEventListLen;

-}

-

-/**

- * 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_event(DeviceIntPtr dev, DeviceEvent* event, Time ms)

-{

-    memset(event, 0, sizeof(DeviceEvent));

-    event->header = ET_Internal;

-    event->length = sizeof(DeviceEvent);

-    event->time = ms;

-    event->deviceid = dev->id;

-    event->sourceid = 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);

-    event->type = ET_RawKeyPress - ET_KeyPress + type;

-    event->time = ms;

-    event->deviceid = dev->id;

-    event->sourceid = dev->id;

-    event->detail.button = detail;

-}

-

-static void

-set_raw_valuators(RawDeviceEvent *event, ValuatorMask *mask, int32_t* data)

-{

-    int i;

-

-    for (i = 0; i < valuator_mask_size(mask); i++)

-    {

-        if (valuator_mask_isset(mask, i))

-        {

-            SetBit(event->valuators.mask, i);

-            data[i] = valuator_mask_get(mask, i);

-        }

-    }

-}

-

-

-static void

-set_valuators(DeviceIntPtr dev, DeviceEvent* event, ValuatorMask *mask)

-{

-    int i;

-

-    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(mask, i);

-            event->valuators.data_frac[i] =

-                dev->last.remainder[i] * (1 << 16) * (1 << 16);

-        }

-    }

-}

-

-void

-CreateClassesChangedEvent(EventList* event,

-                          DeviceIntPtr master,

-                          DeviceIntPtr slave,

-                          int type)

-{

-    int i;

-    DeviceChangedEvent *dce;

-    CARD32 ms = GetTimeInMillis();

-

-    dce = (DeviceChangedEvent*)event->event;

-    memset(dce, 0, sizeof(DeviceChangedEvent));

-    dce->deviceid = slave->id;

-    dce->masterid = master->id;

-    dce->header = ET_Internal;

-    dce->length = sizeof(DeviceChangedEvent);

-    dce->type = ET_DeviceChanged;

-    dce->time = ms;

-    dce->flags = type;

-    dce->flags |= DEVCHANGE_SLAVE_SWITCH;

-    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;

-        }

-    }

-    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 int

-rescaleValuatorAxis(int coord, float remainder, float *remainder_return, AxisInfoPtr from, AxisInfoPtr to,

-                    int defmax)

-{

-    int fmin = 0, tmin = 0, fmax = defmax, tmax = defmax, coord_return;

-    float value;

-

-    if(from && from->min_value < from->max_value) {

-        fmin = from->min_value;

-        fmax = from->max_value;

-    }

-    if(to && to->min_value < to->max_value) {

-        tmin = to->min_value;

-        tmax = to->max_value;

-    }

-

-    if(fmin == tmin && fmax == tmax) {

-        if (remainder_return)

-            *remainder_return = remainder;

-        return coord;

-    }

-

-    if(fmax == fmin) { /* avoid division by 0 */

-        if (remainder_return)

-            *remainder_return = 0.0;

-        return 0;

-    }

-

-    value = (coord + remainder - fmin) * (tmax - tmin) / (fmax - fmin) + tmin;

-    coord_return = lroundf(value);

-    if (remainder_return)

-        *remainder_return = value - coord_return;

-    return coord_return;

-}

-

-/**

- * 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)

-{

-    ScreenPtr scr = miPointerGetScreen(pDev);

-    int i;

-    DeviceIntPtr lastSlave;

-

-    /* master->last.valuators[0]/[1] is in screen 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], pDev->last.remainder[0],

-                        &pDev->last.remainder[0], NULL, pDev->valuator->axes + 0, scr->width);

-    if(pDev->valuator->numAxes > 1)

-        pDev->last.valuators[1] = rescaleValuatorAxis(pDev->last.valuators[1], pDev->last.remainder[1],

-                        &pDev->last.remainder[1], NULL, pDev->valuator->axes + 1, scr->height);

-

-    /* calculate the other axis as well based on info from the old

-     * slave-device. If the old slave had less axes than this one,

-     * last.valuators is reset to 0.

-     */

-    if ((lastSlave = master->last.slave) && lastSlave->valuator) {

-        for (i = 2; i < pDev->valuator->numAxes; i++) {

-            if (i >= lastSlave->valuator->numAxes)

-                pDev->last.valuators[i] = 0;

-            else

-                pDev->last.valuators[i] =

-                    rescaleValuatorAxis(pDev->last.valuators[i],

-                            pDev->last.remainder[i],

-                            &pDev->last.remainder[i],

-                            lastSlave->valuator->axes + i,

-                            pDev->valuator->axes + i, 0);

-        }

-    }

-

-}

-

-/**

- * 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;

-    int dflt;

-    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(&current, 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, 0.0, NULL, &from, to, 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, 0.0, NULL, &from, to, 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;

-

-                    if (j == 0 && (to->max_value < to->min_value))

-                        dflt = pScreen->width;

-                    else if (j == 1 && (to->max_value < to->min_value))

-                        dflt = pScreen->height;

-                    else

-                        dflt = 0;

-

-                    /* scale from stored range into current range */

-                    coord = rescaleValuatorAxis(coord, 0.0, NULL, &from, to, 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,

-                    int *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++)

-        {

-            /* 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);

-            memcpy(buff, &valuators[i], 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++)

-        {

-            if (valuator_mask_size(mask) <= i || !valuator_mask_isset(mask, i))

-            {

-                buff += sizeof(INT32);

-                continue;

-            }

-            memcpy(buff, &valuators[i], 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,

- * GetKeyboardValuatorEvents, 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

-     */

-    return 3;

-}

-

-

-/**

- * Clip an axis to its bounds, which are declared in the call to

- * InitValuatorAxisClassStruct.

- */

-static void

-clipAxis(DeviceIntPtr pDev, int axisNum, int *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))

-        {

-            int val = valuator_mask_get(mask, i);

-            clipAxis(pDev, i, &val);

-            valuator_mask_set(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 list.

- * @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.

- */

-EventListPtr

-UpdateFromMaster(EventListPtr 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);

-        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 which's pointer is to be moved.

- * @param x Returns the x position of the pointer after the move.

- * @param y Returns the y position of the pointer after the move.

- * @param mask Bit mask of valid valuators.

- * @param valuators Valuator data for each axis between @first and

- *        @first+@num.

- */

-static void

-moveAbsolute(DeviceIntPtr dev, int *x, int *y, ValuatorMask *mask)

-{

-    int i;

-

-    if (valuator_mask_isset(mask, 0))

-        *x = valuator_mask_get(mask, 0);

-    else

-        *x = dev->last.valuators[0];

-

-    if (valuator_mask_isset(mask, 1))

-        *y = valuator_mask_get(mask, 1);

-    else

-        *y = dev->last.valuators[1];

-

-    clipAxis(dev, 0, x);

-    clipAxis(dev, 1, y);

-

-    for (i = 2; i < valuator_mask_size(mask); i++)

-    {

-        if (valuator_mask_isset(mask, i))

-        {

-            dev->last.valuators[i] = valuator_mask_get(mask, i);

-            clipAxis(dev, i, &dev->last.valuators[i]);

-        }

-    }

-}

-

-/**

- * Move the device's pointer by the values given in @valuators.

- *

- * @param dev The device which's pointer is to be moved.

- * @param x Returns the x position of the pointer after the move.

- * @param y Returns the y position of the pointer after the move.

- * @param mask Bit mask of valid valuators.

- * @param valuators Valuator data for each axis between @first and

- *        @first+@num.

- */

-static void

-moveRelative(DeviceIntPtr dev, int *x, int *y, ValuatorMask *mask)

-{

-    int i;

-

-    *x = dev->last.valuators[0];

-    *y = dev->last.valuators[1];

-

-    if (valuator_mask_isset(mask, 0))

-        *x += valuator_mask_get(mask, 0);

-

-    if (valuator_mask_isset(mask, 1))

-        *y += valuator_mask_get(mask, 1);

-

-    /* if attached, clip both x and y to the defined limits (usually

-     * co-ord space limit). If it is attached, we need x/y to go over the

-     * limits to be able to change screens. */

-    if(dev->u.master) {

-        if (valuator_get_mode(dev, 0) == Absolute)

-            clipAxis(dev, 0, x);

-        if (valuator_get_mode(dev, 1) == Absolute)

-            clipAxis(dev, 1, y);

-    }

-

-    /* calc other axes, clip, drop back into valuators */

-    for (i = 2; i < valuator_mask_size(mask); i++)

-    {

-        if (valuator_mask_isset(mask, i))

-        {

-            dev->last.valuators[i] += valuator_mask_get(mask, i);

-            if (valuator_get_mode(dev, i) == Absolute)

-                clipAxis(dev, i, &dev->last.valuators[i]);

-            valuator_mask_set(mask, i, dev->last.valuators[i]);

-        }

-    }

-}

-

-/**

- * Accelerate the data in valuators based on the device's acceleration scheme.

- *

- * @param dev The device which's pointer is to be moved.

- * @param first The first valuator in @valuators

- * @param num Total number of valuators in @valuators.

- * @param valuators Valuator data for each axis between @first and

- *        @first+@num.

- * @param ms Current time.

- */

-static void

-accelPointer(DeviceIntPtr dev, int first, int num, int *valuators, CARD32 ms)

-{

-    if (dev->valuator->accelScheme.AccelSchemeProc)

-        dev->valuator->accelScheme.AccelSchemeProc(dev, first, num, valuators, ms);

-}

-

-/**

- * If we have HW cursors, this actually moves the visible sprite. If not, we

- * just do all the screen crossing, etc.

- *

- * We scale from device to screen coordinates here, call

- * miPointerSetPosition() and then scale back into device coordinates (if

- * needed). miPSP will change x/y if the screen was crossed.

- *

- * @param dev The device to be moved.

- * @param x Pointer to current x-axis value, may be modified.

- * @param y Pointer to current y-axis value, may be modified.

- * @param x_frac Fractional part of current x-axis value, may be modified.

- * @param y_frac Fractional part of current y-axis value, may be modified.

- * @param scr Screen the device's sprite is currently on.

- * @param screenx Screen x coordinate the sprite is on after the update.

- * @param screeny Screen y coordinate the sprite is on after the update.

- * @param screenx_frac Fractional part of screen x coordinate, as above.

- * @param screeny_frac Fractional part of screen y coordinate, as above.

- */

-static void

-positionSprite(DeviceIntPtr dev, int *x, int *y, float x_frac, float y_frac,

-               ScreenPtr scr, int *screenx, int *screeny, float *screenx_frac, float *screeny_frac)

-{

-    int old_screenx, old_screeny;

-

-    /* scale x&y to screen */

-    if (dev->valuator->numAxes > 0) {

-        *screenx = rescaleValuatorAxis(*x, x_frac, screenx_frac,

-                dev->valuator->axes + 0, NULL, scr->width);

-    } else {

-        *screenx = dev->last.valuators[0];

-        *screenx_frac = dev->last.remainder[0];

-    }

-

-    if (dev->valuator->numAxes > 1) {

-        *screeny = rescaleValuatorAxis(*y, y_frac, screeny_frac,

-                dev->valuator->axes + 1, NULL, scr->height);

-    } else {

-        *screeny = dev->last.valuators[1];

-        *screeny_frac = dev->last.remainder[1];

-    }

-

-    /* Hit the left screen edge? */

-    if (*screenx <= 0 && *screenx_frac < 0.0f)

-    {

-        *screenx_frac = 0.0f;

-        x_frac = 0.0f;

-    }

-    if (*screeny <= 0 && *screeny_frac < 0.0f)

-    {

-        *screeny_frac = 0.0f;

-        y_frac = 0.0f;

-    }

-

-

-    old_screenx = *screenx;

-    old_screeny = *screeny;

-    /* This takes care of crossing screens for us, as well as clipping

-     * to the current screen. */

-    miPointerSetPosition(dev, screenx, screeny);

-

-    if (dev->u.master) {

-        dev->u.master->last.valuators[0] = *screenx;

-        dev->u.master->last.valuators[1] = *screeny;

-        dev->u.master->last.remainder[0] = *screenx_frac;

-        dev->u.master->last.remainder[1] = *screeny_frac;

-    }

-

-    /* Crossed screen? Scale back to device coordiantes */

-    if(*screenx != old_screenx)

-    {

-        scr = miPointerGetScreen(dev);

-        *x = rescaleValuatorAxis(*screenx, *screenx_frac, &x_frac, NULL,

-                                dev->valuator->axes + 0, scr->width);

-    }

-    if(*screeny != old_screeny)

-    {

-        scr = miPointerGetScreen(dev);

-        *y = rescaleValuatorAxis(*screeny, *screeny_frac, &y_frac, NULL,

-                                 dev->valuator->axes + 1, scr->height);

-    }

-

-    /* dropy x/y (device coordinates) back into valuators for next event */

-    dev->last.valuators[0] = *x;

-    dev->last.valuators[1] = *y;

-    dev->last.remainder[0] = x_frac;

-    dev->last.remainder[1] = y_frac;

-}

-

-/**

- * 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

- */

-static void

-updateHistory(DeviceIntPtr dev, ValuatorMask *mask, CARD32 ms)

-{

-    updateMotionHistory(dev, ms, mask, dev->last.valuators);

-    if (dev->u.master)

-    {

-        DeviceIntPtr master = GetMaster(dev, MASTER_POINTER);

-        updateMotionHistory(master, ms, mask, dev->last.valuators);

-    }

-}

-

-/**

- * Convenience wrapper around GetKeyboardValuatorEvents, that takes no

- * valuators.

- */

-int

-GetKeyboardEvents(EventList *events, DeviceIntPtr pDev, int type, int key_code) {

-    ValuatorMask mask;

-

-    valuator_mask_zero(&mask);

-    return GetKeyboardValuatorEvents(events, pDev, type, key_code, &mask);

-}

-

-

-/**

- * Returns a set of InternalEvents for KeyPress/KeyRelease, optionally

- * also with valuator events.

- *

- * events is not NULL-terminated; the return value is the number of events.

- * The DDX is responsible for allocating the event structure in the first

- * place via GetMaximumEventsNum(), and for freeing it.

- */

-int

-GetKeyboardValuatorEvents(EventList *events, DeviceIntPtr pDev, int type,

-                          int key_code, const ValuatorMask *mask_in) {

-    int num_events = 0;

-    CARD32 ms = 0;

-    DeviceEvent *event;

-    RawDeviceEvent *raw;

-    ValuatorMask mask;

-

-    /* refuse events from disabled devices */

-    if (!pDev->enabled)

-        return 0;

-

-    if (!events ||!pDev->key || !pDev->focus || !pDev->kbdfeed ||

-       (type != KeyPress && type != KeyRelease) ||

-       (key_code < 8 || key_code > 255))

-        return 0;

-

-    num_events = 1;

-

-    events = UpdateFromMaster(events, pDev, DEVCHANGE_KEYBOARD_EVENT, &num_events);

-

-    /* Handle core repeating, via press/release/press/release. */

-    if (type == KeyPress && key_is_down(pDev, key_code, KEY_POSTED)) {

-        /* If autorepeating is disabled either globally or just for that key,

-         * or we have a modifier, don't generate a repeat event. */

-        if (!pDev->kbdfeed->ctrl.autoRepeat ||

-            !key_autorepeats(pDev, key_code) ||

-            pDev->key->xkbInfo->desc->map->modmap[key_code])

-            return 0;

-    }

-

-    ms = GetTimeInMillis();

-

-    raw = (RawDeviceEvent*)events->event;

-    events++;

-    num_events++;

-

-    valuator_mask_copy(&mask, mask_in);

-

-    init_raw(pDev, raw, ms, type, key_code);

-    set_raw_valuators(raw, &mask, raw->valuators.data_raw);

-

-    clipValuators(pDev, &mask);

-

-    set_raw_valuators(raw, &mask, raw->valuators.data);

-

-    event = (DeviceEvent*) events->event;

-    init_event(pDev, event, ms);

-    event->detail.key = key_code;

-

-    if (type == KeyPress) {

-        event->type = ET_KeyPress;

-	set_key_down(pDev, key_code, KEY_POSTED);

-    }

-    else if (type == KeyRelease) {

-        event->type = ET_KeyRelease;

-	set_key_up(pDev, key_code, KEY_POSTED);

-    }

-

-    clipValuators(pDev, &mask);

-

-    set_valuators(pDev, event, &mask);

-

-    return num_events;

-}

-

-/**

- * Initialize an event list and fill with 32 byte sized events.

- * This event list is to be passed into GetPointerEvents() and

- * GetKeyboardEvents().

- *

- * @param num_events Number of elements in list.

- */

-EventListPtr

-InitEventList(int num_events)

-{

-    EventListPtr events;

-    int i;

-

-    events = (EventListPtr)calloc(num_events, sizeof(EventList));

-    if (!events)

-        return NULL;

-

-    for (i = 0; i < num_events; i++)

-    {

-        events[i].evlen = sizeof(InternalEvent);

-        events[i].event = calloc(1, sizeof(InternalEvent));

-        if (!events[i].event)

-        {

-            /* rollback */

-            while(i--)

-                free(events[i].event);

-            free(events);

-            events = NULL;

-            break;

-        }

-    }

-

-    return events;

-}

-

-/**

- * Free an event list.

- *

- * @param list The list to be freed.

- * @param num_events Number of elements in list.

- */

-void

-FreeEventList(EventListPtr list, int num_events)

-{

-    if (!list)

-        return;

-    while(num_events--)

-        free(list[num_events].event);

-    free(list);

-}

-

-static void

-transformAbsolute(DeviceIntPtr dev, ValuatorMask *mask)

-{

-    struct pixman_f_vector p;

-

-    /* p' = M * p in homogeneous coordinates */

-    p.v[0] = (valuator_mask_isset(mask, 0) ? valuator_mask_get(mask, 0) :

-              dev->last.valuators[0]);

-    p.v[1] = (valuator_mask_isset(mask, 1) ? valuator_mask_get(mask, 1) :

-              dev->last.valuators[1]);

-    p.v[2] = 1.0;

-

-    pixman_f_transform_point(&dev->transform, &p);

-

-    if (lround(p.v[0]) != dev->last.valuators[0])

-        valuator_mask_set(mask, 0, lround(p.v[0]));

-    if (lround(p.v[1]) != dev->last.valuators[1])

-        valuator_mask_set(mask, 1, lround(p.v[1]));

-}

-

-/**

- * Generate a series of InternalEvents (filled into the EventList)

- * representing pointer motion, or button presses.

- *

- * events is not NULL-terminated; the return value is the number of events.

- * The DDX is responsible for allocating the event structure in the first

- * place via InitEventList() and GetMaximumEventsNum(), and for freeing it.

- *

- * In the generated events rootX/Y will be in absolute screen coords and

- * the valuator information in the absolute or relative device coords.

- *

- * last.valuators[x] of the device is always in absolute device coords.

- * last.valuators[x] of the master device is in absolute screen coords.

- *

- * master->last.valuators[x] for x > 2 is undefined.

- */

-int

-GetPointerEvents(EventList *events, DeviceIntPtr pDev, int type, int buttons,

-                 int flags, const ValuatorMask *mask_in) {

-    int num_events = 1;

-    CARD32 ms;

-    DeviceEvent *event;

-    RawDeviceEvent    *raw;

-    int x = 0, y = 0, /* device coords */

-        cx, cy; /* only screen coordinates */

-    float x_frac = 0.0, y_frac = 0.0, cx_frac, cy_frac;

-    ScreenPtr scr = miPointerGetScreen(pDev);

-    ValuatorMask mask;

-

-    /* refuse events from disabled devices */

-    if (!pDev->enabled)

-        return 0;

-

-    ms = GetTimeInMillis(); /* before pointer update to help precision */

-

-    if (!scr || !pDev->valuator ||

-        (type != MotionNotify && type != ButtonPress && type != ButtonRelease) ||

-        (type != MotionNotify && !pDev->button) ||

-        ((type == ButtonPress || type == ButtonRelease) && !buttons))

-        return 0;

-

-    if (type == MotionNotify &&

-        (!mask_in || valuator_mask_num_valuators(mask_in) <= 0))

-        return 0;

-

-    events = UpdateFromMaster(events, pDev, DEVCHANGE_POINTER_EVENT, &num_events);

-

-    raw = (RawDeviceEvent*)events->event;

-    events++;

-    num_events++;

-

-    valuator_mask_copy(&mask, mask_in);

-

-    init_raw(pDev, raw, ms, type, buttons);

-    set_raw_valuators(raw, &mask, raw->valuators.data_raw);

-

-    if (flags & POINTER_ABSOLUTE)

-    {

-        if (flags & POINTER_SCREEN) /* valuators are in screen coords */

-        {

-            int scaled;

-

-            if (valuator_mask_isset(&mask, 0))

-            {

-                scaled = rescaleValuatorAxis(valuator_mask_get(&mask, 0),

-                                             0.0, &x_frac, NULL,

-                                             pDev->valuator->axes + 0,

-                                             scr->width);

-                valuator_mask_set(&mask, 0, scaled);

-            }

-            if (valuator_mask_isset(&mask, 1))

-            {

-                scaled = rescaleValuatorAxis(valuator_mask_get(&mask, 1),

-                                             0.0, &y_frac, NULL,

-                                             pDev->valuator->axes + 1,

-                                             scr->height);

-                valuator_mask_set(&mask, 1, scaled);

-            }

-        }

-

-        transformAbsolute(pDev, &mask);

-        moveAbsolute(pDev, &x, &y, &mask);

-    } else {

-        if (flags & POINTER_ACCELERATE) {

-            /* FIXME: Pointer acceleration only requires X and Y values. This

-             * should be converted to masked valuators. */

-            int vals[2];

-            vals[0] = valuator_mask_isset(&mask, 0) ?

-                      valuator_mask_get(&mask, 0) : 0;

-            vals[1] = valuator_mask_isset(&mask, 1) ?

-                      valuator_mask_get(&mask, 1) : 0;

-            accelPointer(pDev, 0, 2, vals, ms);

-

-            if (valuator_mask_isset(&mask, 0))

-                valuator_mask_set(&mask, 0, vals[0]);

-            if (valuator_mask_isset(&mask, 1))

-                valuator_mask_set(&mask, 1, vals[1]);

-

-            /* The pointer acceleration code modifies the fractional part

-             * in-place, so we need to extract this information first */

-            x_frac = pDev->last.remainder[0];

-            y_frac = pDev->last.remainder[1];

-        }

-        moveRelative(pDev, &x, &y, &mask);

-    }

-

-    set_raw_valuators(raw, &mask, raw->valuators.data);

-

-    positionSprite(pDev, &x, &y, x_frac, y_frac, scr, &cx, &cy, &cx_frac, &cy_frac);

-    updateHistory(pDev, &mask, ms);

-

-    /* Update the valuators with the true value sent to the client*/

-    if (valuator_mask_isset(&mask, 0))

-        valuator_mask_set(&mask, 0, x);

-    if (valuator_mask_isset(&mask, 1))

-        valuator_mask_set(&mask, 1, y);

-

-    clipValuators(pDev, &mask);

-

-    event = (DeviceEvent*) events->event;

-    init_event(pDev, event, ms);

-

-    if (type == MotionNotify) {

-        event->type = ET_Motion;

-        event->detail.button = 0;

-    }

-    else {

-        if (type == ButtonPress) {

-            event->type = ET_ButtonPress;

-            set_button_down(pDev, buttons, BUTTON_POSTED);

-        }

-        else if (type == ButtonRelease) {

-            event->type = ET_ButtonRelease;

-            set_button_up(pDev, buttons, BUTTON_POSTED);

-        }

-        event->detail.button = buttons;

-    }

-

-    event->root_x = cx; /* root_x/y always in screen coords */

-    event->root_y = cy;

-    event->root_x_frac = cx_frac;

-    event->root_y_frac = cy_frac;

-

-    set_valuators(pDev, event, &mask);

-

-    return num_events;

-}

-

-

-/**

- * Generate ProximityIn/ProximityOut InternalEvents, accompanied by

- * valuators.

- *

- * events is not NULL-terminated; the return value is the number of events.

- * The DDX is responsible for allocating the event structure in the first

- * place via GetMaximumEventsNum(), and for freeing it.

- */

-int

-GetProximityEvents(EventList *events, DeviceIntPtr pDev, int type, const ValuatorMask *mask_in)

-{

-    int num_events = 1, i;

-    DeviceEvent *event;

-    ValuatorMask mask;

-

-    /* refuse events from disabled devices */

-    if (!pDev->enabled)

-        return 0;

-

-    /* Sanity checks. */

-    if ((type != ProximityIn && type != ProximityOut) || !mask_in)

-        return 0;

-    if (!pDev->valuator)

-        return 0;

-

-    valuator_mask_copy(&mask, mask_in);

-

-    /* ignore relative axes for proximity. */

-    for (i = 0; i < valuator_mask_size(&mask); i++)

-    {

-        if (valuator_mask_isset(&mask, i) &&

-            valuator_get_mode(pDev, i) == Relative)

-            valuator_mask_unset(&mask, i);

-    }

-

-    /* FIXME: posting proximity events with relative valuators only results

-     * in an empty event, EventToXI() will fail to convert → no event sent

-     * to client. */

-

-    events = UpdateFromMaster(events, pDev, DEVCHANGE_POINTER_EVENT, &num_events);

-

-    event = (DeviceEvent *) events->event;

-    init_event(pDev, event, GetTimeInMillis());

-    event->type = (type == ProximityIn) ? ET_ProximityIn : ET_ProximityOut;

-

-    clipValuators(pDev, &mask);

-

-    set_valuators(pDev, event, &mask);

-

-    return num_events;

-}

-

-/**

- * Synthesize a single motion event for the core pointer.

- *

- * Used in cursor functions, e.g. when cursor confinement changes, and we need

- * to shift the pointer to get it inside the new bounds.

- */

-void

-PostSyntheticMotion(DeviceIntPtr pDev,

-                    int x,

-                    int y,

-                    int screen,

-                    unsigned long time)

-{

-    DeviceEvent ev;

-

-#ifdef PANORAMIX

-    /* Translate back to the sprite screen since processInputProc

-       will translate from sprite screen to screen 0 upon reentry

-       to the DIX layer. */

-    if (!noPanoramiXExtension) {

-        x += screenInfo.screens[0]->x - screenInfo.screens[screen]->x;

-        y += screenInfo.screens[0]->y - screenInfo.screens[screen]->y;

-    }

-#endif

-

-    memset(&ev, 0, sizeof(DeviceEvent));

-    init_event(pDev, &ev, time);

-    ev.root_x = x;

-    ev.root_y = y;

-    ev.type = ET_Motion;

-    ev.time = time;

-

-    /* FIXME: MD/SD considerations? */

-    (*pDev->public.processInputProc)((InternalEvent*)&ev, pDev);

-}

+/*
+ * Copyright © 2006 Nokia Corporation
+ * Copyright © 2006-2007 Daniel Stone
+ * Copyright © 2008 Red Hat, Inc.
+ *
+ * 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 <daniel@fooishbar.org>
+ *          Peter Hutterer <peter.hutterer@who-t.net>
+ */
+
+#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 "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 <X11/extensions/XKBproto.h>
+#include "xkbsrv.h"
+
+#ifdef PANORAMIX
+#include "panoramiX.h"
+#include "panoramiXsrv.h"
+#endif
+
+#include <X11/extensions/XI.h>
+#include <X11/extensions/XIproto.h>
+#include <pixman.h>
+#include "exglobals.h"
+#include "exevents.h"
+#include "exglobals.h"
+#include "extnsionst.h"
+#include "listdev.h" /* for sizing up DeviceClassesChangedEvent */
+
+/* Number of motion history events to store. */
+#define MOTION_HISTORY_SIZE 256
+
+/* InputEventList is the container list for all input events generated by the
+ * DDX. The DDX is expected to call GetEventList() and then pass the list into
+ * Get{Pointer|Keyboard}Events.
+ */
+EventListPtr InputEventList = NULL;
+int InputEventListLen = 0;
+
+int
+GetEventList(EventListPtr* list)
+{
+    *list = InputEventList;
+    return InputEventListLen;
+}
+
+/**
+ * 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_event(DeviceIntPtr dev, DeviceEvent* event, Time ms)
+{
+    memset(event, 0, sizeof(DeviceEvent));
+    event->header = ET_Internal;
+    event->length = sizeof(DeviceEvent);
+    event->time = ms;
+    event->deviceid = dev->id;
+    event->sourceid = 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);
+    event->type = ET_RawKeyPress - ET_KeyPress + type;
+    event->time = ms;
+    event->deviceid = dev->id;
+    event->sourceid = dev->id;
+    event->detail.button = detail;
+}
+
+static void
+set_raw_valuators(RawDeviceEvent *event, ValuatorMask *mask, int32_t* data)
+{
+    int i;
+
+    for (i = 0; i < valuator_mask_size(mask); i++)
+    {
+        if (valuator_mask_isset(mask, i))
+        {
+            SetBit(event->valuators.mask, i);
+            data[i] = valuator_mask_get(mask, i);
+        }
+    }
+}
+
+
+static void
+set_valuators(DeviceIntPtr dev, DeviceEvent* event, ValuatorMask *mask)
+{
+    int i;
+
+    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(mask, i);
+            event->valuators.data_frac[i] =
+                dev->last.remainder[i] * (1 << 16) * (1 << 16);
+        }
+    }
+}
+
+void
+CreateClassesChangedEvent(EventList* event,
+                          DeviceIntPtr master,
+                          DeviceIntPtr slave,
+                          int type)
+{
+    int i;
+    DeviceChangedEvent *dce;
+    CARD32 ms = GetTimeInMillis();
+
+    dce = (DeviceChangedEvent*)event->event;
+    memset(dce, 0, sizeof(DeviceChangedEvent));
+    dce->deviceid = slave->id;
+    dce->masterid = master->id;
+    dce->header = ET_Internal;
+    dce->length = sizeof(DeviceChangedEvent);
+    dce->type = ET_DeviceChanged;
+    dce->time = ms;
+    dce->flags = type;
+    dce->flags |= DEVCHANGE_SLAVE_SWITCH;
+    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;
+        }
+    }
+    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 int
+rescaleValuatorAxis(int coord, float remainder, float *remainder_return, AxisInfoPtr from, AxisInfoPtr to,
+                    int defmax)
+{
+    int fmin = 0, tmin = 0, fmax = defmax, tmax = defmax, coord_return;
+    float value;
+
+    if(from && from->min_value < from->max_value) {
+        fmin = from->min_value;
+        fmax = from->max_value;
+    }
+    if(to && to->min_value < to->max_value) {
+        tmin = to->min_value;
+        tmax = to->max_value;
+    }
+
+    if(fmin == tmin && fmax == tmax) {
+        if (remainder_return)
+            *remainder_return = remainder;
+        return coord;
+    }
+
+    if(fmax == fmin) { /* avoid division by 0 */
+        if (remainder_return)
+            *remainder_return = 0.0;
+        return 0;
+    }
+
+    value = (coord + remainder - fmin) * (tmax - tmin) / (fmax - fmin) + tmin;
+    coord_return = lroundf(value);
+    if (remainder_return)
+        *remainder_return = value - coord_return;
+    return coord_return;
+}
+
+/**
+ * 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)
+{
+    ScreenPtr scr = miPointerGetScreen(pDev);
+    int i;
+    DeviceIntPtr lastSlave;
+
+    /* master->last.valuators[0]/[1] is in screen 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], pDev->last.remainder[0],
+                        &pDev->last.remainder[0], NULL, pDev->valuator->axes + 0, scr->width);
+    if(pDev->valuator->numAxes > 1)
+        pDev->last.valuators[1] = rescaleValuatorAxis(pDev->last.valuators[1], pDev->last.remainder[1],
+                        &pDev->last.remainder[1], NULL, pDev->valuator->axes + 1, scr->height);
+
+    /* calculate the other axis as well based on info from the old
+     * slave-device. If the old slave had less axes than this one,
+     * last.valuators is reset to 0.
+     */
+    if ((lastSlave = master->last.slave) && lastSlave->valuator) {
+        for (i = 2; i < pDev->valuator->numAxes; i++) {
+            if (i >= lastSlave->valuator->numAxes)
+                pDev->last.valuators[i] = 0;
+            else
+                pDev->last.valuators[i] =
+                    rescaleValuatorAxis(pDev->last.valuators[i],
+                            pDev->last.remainder[i],
+                            &pDev->last.remainder[i],
+                            lastSlave->valuator->axes + i,
+                            pDev->valuator->axes + i, 0);
+        }
+    }
+
+}
+
+/**
+ * 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;
+    int dflt;
+    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(&current, 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, 0.0, NULL, &from, to, 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, 0.0, NULL, &from, to, 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;
+
+                    if (j == 0 && (to->max_value < to->min_value))
+                        dflt = pScreen->width;
+                    else if (j == 1 && (to->max_value < to->min_value))
+                        dflt = pScreen->height;
+                    else
+                        dflt = 0;
+
+                    /* scale from stored range into current range */
+                    coord = rescaleValuatorAxis(coord, 0.0, NULL, &from, to, 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,
+                    int *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++)
+        {
+            /* 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);
+            memcpy(buff, &valuators[i], 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++)
+        {
+            if (valuator_mask_size(mask) <= i || !valuator_mask_isset(mask, i))
+            {
+                buff += sizeof(INT32);
+                continue;
+            }
+            memcpy(buff, &valuators[i], 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,
+ * GetKeyboardValuatorEvents, 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
+     */
+    return 3;
+}
+
+
+/**
+ * Clip an axis to its bounds, which are declared in the call to
+ * InitValuatorAxisClassStruct.
+ */
+static void
+clipAxis(DeviceIntPtr pDev, int axisNum, int *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))
+        {
+            int val = valuator_mask_get(mask, i);
+            clipAxis(pDev, i, &val);
+            valuator_mask_set(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 list.
+ * @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.
+ */
+EventListPtr
+UpdateFromMaster(EventListPtr 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);
+        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 which's pointer is to be moved.
+ * @param x Returns the x position of the pointer after the move.
+ * @param y Returns the y position of the pointer after the move.
+ * @param mask Bit mask of valid valuators.
+ * @param valuators Valuator data for each axis between @first and
+ *        @first+@num.
+ */
+static void
+moveAbsolute(DeviceIntPtr dev, int *x, int *y, ValuatorMask *mask)
+{
+    int i;
+
+    if (valuator_mask_isset(mask, 0))
+        *x = valuator_mask_get(mask, 0);
+    else
+        *x = dev->last.valuators[0];
+
+    if (valuator_mask_isset(mask, 1))
+        *y = valuator_mask_get(mask, 1);
+    else
+        *y = dev->last.valuators[1];
+
+    clipAxis(dev, 0, x);
+    clipAxis(dev, 1, y);
+
+    for (i = 2; i < valuator_mask_size(mask); i++)
+    {
+        if (valuator_mask_isset(mask, i))
+        {
+            dev->last.valuators[i] = valuator_mask_get(mask, i);
+            clipAxis(dev, i, &dev->last.valuators[i]);
+        }
+    }
+}
+
+/**
+ * Move the device's pointer by the values given in @valuators.
+ *
+ * @param dev The device which's pointer is to be moved.
+ * @param x Returns the x position of the pointer after the move.
+ * @param y Returns the y position of the pointer after the move.
+ * @param mask Bit mask of valid valuators.
+ * @param valuators Valuator data for each axis between @first and
+ *        @first+@num.
+ */
+static void
+moveRelative(DeviceIntPtr dev, int *x, int *y, ValuatorMask *mask)
+{
+    int i;
+
+    *x = dev->last.valuators[0];
+    *y = dev->last.valuators[1];
+
+    if (valuator_mask_isset(mask, 0))
+        *x += valuator_mask_get(mask, 0);
+
+    if (valuator_mask_isset(mask, 1))
+        *y += valuator_mask_get(mask, 1);
+
+    /* if attached, clip both x and y to the defined limits (usually
+     * co-ord space limit). If it is attached, we need x/y to go over the
+     * limits to be able to change screens. */
+    if(dev->u.master && dev->valuator) {
+        if (valuator_get_mode(dev, 0) == Absolute)
+            clipAxis(dev, 0, x);
+        if (valuator_get_mode(dev, 1) == Absolute)
+            clipAxis(dev, 1, y);
+    }
+
+    /* calc other axes, clip, drop back into valuators */
+    for (i = 2; i < valuator_mask_size(mask); i++)
+    {
+        if (valuator_mask_isset(mask, i))
+        {
+            dev->last.valuators[i] += valuator_mask_get(mask, i);
+            if (valuator_get_mode(dev, i) == Absolute)
+                clipAxis(dev, i, &dev->last.valuators[i]);
+            valuator_mask_set(mask, i, dev->last.valuators[i]);
+        }
+    }
+}
+
+/**
+ * Accelerate the data in valuators based on the device's acceleration scheme.
+ *
+ * @param dev The device which's pointer is to be moved.
+ * @param first The first valuator in @valuators
+ * @param num Total number of valuators in @valuators.
+ * @param valuators Valuator data for each axis between @first and
+ *        @first+@num.
+ * @param ms Current time.
+ */
+static void
+accelPointer(DeviceIntPtr dev, int first, int num, int *valuators, CARD32 ms)
+{
+    if (dev->valuator->accelScheme.AccelSchemeProc)
+        dev->valuator->accelScheme.AccelSchemeProc(dev, first, num, valuators, ms);
+}
+
+/**
+ * If we have HW cursors, this actually moves the visible sprite. If not, we
+ * just do all the screen crossing, etc.
+ *
+ * We scale from device to screen coordinates here, call
+ * miPointerSetPosition() and then scale back into device coordinates (if
+ * needed). miPSP will change x/y if the screen was crossed.
+ *
+ * @param dev The device to be moved.
+ * @param x Pointer to current x-axis value, may be modified.
+ * @param y Pointer to current y-axis value, may be modified.
+ * @param x_frac Fractional part of current x-axis value, may be modified.
+ * @param y_frac Fractional part of current y-axis value, may be modified.
+ * @param scr Screen the device's sprite is currently on.
+ * @param screenx Screen x coordinate the sprite is on after the update.
+ * @param screeny Screen y coordinate the sprite is on after the update.
+ * @param screenx_frac Fractional part of screen x coordinate, as above.
+ * @param screeny_frac Fractional part of screen y coordinate, as above.
+ */
+static void
+positionSprite(DeviceIntPtr dev, int *x, int *y, float x_frac, float y_frac,
+               ScreenPtr scr, int *screenx, int *screeny, float *screenx_frac, float *screeny_frac)
+{
+    int old_screenx, old_screeny;
+
+    /* scale x&y to screen */
+    if (dev->valuator && dev->valuator->numAxes > 0) {
+        *screenx = rescaleValuatorAxis(*x, x_frac, screenx_frac,
+                dev->valuator->axes + 0, NULL, scr->width);
+    } else {
+        *screenx = dev->last.valuators[0];
+        *screenx_frac = dev->last.remainder[0];
+    }
+
+    if (dev->valuator && dev->valuator->numAxes > 1) {
+        *screeny = rescaleValuatorAxis(*y, y_frac, screeny_frac,
+                dev->valuator->axes + 1, NULL, scr->height);
+    } else {
+        *screeny = dev->last.valuators[1];
+        *screeny_frac = dev->last.remainder[1];
+    }
+
+    /* Hit the left screen edge? */
+    if (*screenx <= 0 && *screenx_frac < 0.0f)
+    {
+        *screenx_frac = 0.0f;
+        x_frac = 0.0f;
+    }
+    if (*screeny <= 0 && *screeny_frac < 0.0f)
+    {
+        *screeny_frac = 0.0f;
+        y_frac = 0.0f;
+    }
+
+
+    old_screenx = *screenx;
+    old_screeny = *screeny;
+    /* This takes care of crossing screens for us, as well as clipping
+     * to the current screen. */
+    miPointerSetPosition(dev, screenx, screeny);
+
+    if (dev->u.master) {
+        dev->u.master->last.valuators[0] = *screenx;
+        dev->u.master->last.valuators[1] = *screeny;
+        dev->u.master->last.remainder[0] = *screenx_frac;
+        dev->u.master->last.remainder[1] = *screeny_frac;
+    }
+
+    if (dev->valuator)
+    {
+        /* Crossed screen? Scale back to device coordiantes */
+        if(*screenx != old_screenx)
+        {
+            scr = miPointerGetScreen(dev);
+            *x = rescaleValuatorAxis(*screenx, *screenx_frac, &x_frac, NULL,
+                                    dev->valuator->axes + 0, scr->width);
+        }
+        if(*screeny != old_screeny)
+        {
+            scr = miPointerGetScreen(dev);
+            *y = rescaleValuatorAxis(*screeny, *screeny_frac, &y_frac, NULL,
+                                     dev->valuator->axes + 1, scr->height);
+        }
+    }
+
+    /* dropy x/y (device coordinates) back into valuators for next event */
+    dev->last.valuators[0] = *x;
+    dev->last.valuators[1] = *y;
+    dev->last.remainder[0] = x_frac;
+    dev->last.remainder[1] = y_frac;
+}
+
+/**
+ * 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
+ */
+static void
+updateHistory(DeviceIntPtr dev, ValuatorMask *mask, CARD32 ms)
+{
+    if (!dev->valuator)
+        return;
+
+    updateMotionHistory(dev, ms, mask, dev->last.valuators);
+    if (dev->u.master)
+    {
+        DeviceIntPtr master = GetMaster(dev, MASTER_POINTER);
+        updateMotionHistory(master, ms, mask, dev->last.valuators);
+    }
+}
+
+/**
+ * Convenience wrapper around GetKeyboardValuatorEvents, that takes no
+ * valuators.
+ */
+int
+GetKeyboardEvents(EventList *events, DeviceIntPtr pDev, int type, int key_code) {
+    ValuatorMask mask;
+
+    valuator_mask_zero(&mask);
+    return GetKeyboardValuatorEvents(events, pDev, type, key_code, &mask);
+}
+
+
+/**
+ * Returns a set of InternalEvents for KeyPress/KeyRelease, optionally
+ * also with valuator events.
+ *
+ * events is not NULL-terminated; the return value is the number of events.
+ * The DDX is responsible for allocating the event structure in the first
+ * place via GetMaximumEventsNum(), and for freeing it.
+ */
+int
+GetKeyboardValuatorEvents(EventList *events, DeviceIntPtr pDev, int type,
+                          int key_code, const ValuatorMask *mask_in) {
+    int num_events = 0;
+    CARD32 ms = 0;
+    DeviceEvent *event;
+    RawDeviceEvent *raw;
+    ValuatorMask mask;
+
+    /* refuse events from disabled devices */
+    if (!pDev->enabled)
+        return 0;
+
+    if (!events ||!pDev->key || !pDev->focus || !pDev->kbdfeed ||
+       (type != KeyPress && type != KeyRelease) ||
+       (key_code < 8 || key_code > 255))
+        return 0;
+
+    num_events = 1;
+
+    events = UpdateFromMaster(events, pDev, DEVCHANGE_KEYBOARD_EVENT, &num_events);
+
+    /* Handle core repeating, via press/release/press/release. */
+    if (type == KeyPress && key_is_down(pDev, key_code, KEY_POSTED)) {
+        /* If autorepeating is disabled either globally or just for that key,
+         * or we have a modifier, don't generate a repeat event. */
+        if (!pDev->kbdfeed->ctrl.autoRepeat ||
+            !key_autorepeats(pDev, key_code) ||
+            pDev->key->xkbInfo->desc->map->modmap[key_code])
+            return 0;
+    }
+
+    ms = GetTimeInMillis();
+
+    raw = (RawDeviceEvent*)events->event;
+    events++;
+    num_events++;
+
+    valuator_mask_copy(&mask, mask_in);
+
+    init_raw(pDev, raw, ms, type, key_code);
+    set_raw_valuators(raw, &mask, raw->valuators.data_raw);
+
+    clipValuators(pDev, &mask);
+
+    set_raw_valuators(raw, &mask, raw->valuators.data);
+
+    event = (DeviceEvent*) events->event;
+    init_event(pDev, event, ms);
+    event->detail.key = key_code;
+
+    if (type == KeyPress) {
+        event->type = ET_KeyPress;
+	set_key_down(pDev, key_code, KEY_POSTED);
+    }
+    else if (type == KeyRelease) {
+        event->type = ET_KeyRelease;
+	set_key_up(pDev, key_code, KEY_POSTED);
+    }
+
+    clipValuators(pDev, &mask);
+
+    set_valuators(pDev, event, &mask);
+
+    return num_events;
+}
+
+/**
+ * Initialize an event list and fill with 32 byte sized events.
+ * This event list is to be passed into GetPointerEvents() and
+ * GetKeyboardEvents().
+ *
+ * @param num_events Number of elements in list.
+ */
+EventListPtr
+InitEventList(int num_events)
+{
+    EventListPtr events;
+    int i;
+
+    events = (EventListPtr)calloc(num_events, sizeof(EventList));
+    if (!events)
+        return NULL;
+
+    for (i = 0; i < num_events; i++)
+    {
+        events[i].evlen = sizeof(InternalEvent);
+        events[i].event = calloc(1, sizeof(InternalEvent));
+        if (!events[i].event)
+        {
+            /* rollback */
+            while(i--)
+                free(events[i].event);
+            free(events);
+            events = NULL;
+            break;
+        }
+    }
+
+    return events;
+}
+
+/**
+ * Free an event list.
+ *
+ * @param list The list to be freed.
+ * @param num_events Number of elements in list.
+ */
+void
+FreeEventList(EventListPtr list, int num_events)
+{
+    if (!list)
+        return;
+    while(num_events--)
+        free(list[num_events].event);
+    free(list);
+}
+
+static void
+transformAbsolute(DeviceIntPtr dev, ValuatorMask *mask)
+{
+    struct pixman_f_vector p;
+
+    /* p' = M * p in homogeneous coordinates */
+    p.v[0] = (valuator_mask_isset(mask, 0) ? valuator_mask_get(mask, 0) :
+              dev->last.valuators[0]);
+    p.v[1] = (valuator_mask_isset(mask, 1) ? valuator_mask_get(mask, 1) :
+              dev->last.valuators[1]);
+    p.v[2] = 1.0;
+
+    pixman_f_transform_point(&dev->transform, &p);
+
+    if (lround(p.v[0]) != dev->last.valuators[0])
+        valuator_mask_set(mask, 0, lround(p.v[0]));
+    if (lround(p.v[1]) != dev->last.valuators[1])
+        valuator_mask_set(mask, 1, lround(p.v[1]));
+}
+
+/**
+ * Generate a series of InternalEvents (filled into the EventList)
+ * representing pointer motion, or button presses.
+ *
+ * events is not NULL-terminated; the return value is the number of events.
+ * The DDX is responsible for allocating the event structure in the first
+ * place via InitEventList() and GetMaximumEventsNum(), and for freeing it.
+ *
+ * In the generated events rootX/Y will be in absolute screen coords and
+ * the valuator information in the absolute or relative device coords.
+ *
+ * last.valuators[x] of the device is always in absolute device coords.
+ * last.valuators[x] of the master device is in absolute screen coords.
+ *
+ * master->last.valuators[x] for x > 2 is undefined.
+ */
+int
+GetPointerEvents(EventList *events, DeviceIntPtr pDev, int type, int buttons,
+                 int flags, const ValuatorMask *mask_in) {
+    int num_events = 1;
+    CARD32 ms;
+    DeviceEvent *event;
+    RawDeviceEvent    *raw;
+    int x = 0, y = 0, /* device coords */
+        cx, cy; /* only screen coordinates */
+    float x_frac = 0.0, y_frac = 0.0, cx_frac, cy_frac;
+    ScreenPtr scr = miPointerGetScreen(pDev);
+    ValuatorMask mask;
+
+    /* refuse events from disabled devices */
+    if (!pDev->enabled)
+        return 0;
+
+    if (!scr)
+        return 0;
+
+    switch (type)
+    {
+        case MotionNotify:
+            if (!mask_in || valuator_mask_num_valuators(mask_in) <= 0)
+                return 0;
+            break;
+        case ButtonPress:
+        case ButtonRelease:
+            if (!pDev->button || !buttons)
+                return 0;
+            break;
+        default:
+            return 0;
+    }
+
+    ms = GetTimeInMillis(); /* before pointer update to help precision */
+
+    events = UpdateFromMaster(events, pDev, DEVCHANGE_POINTER_EVENT, &num_events);
+
+    raw = (RawDeviceEvent*)events->event;
+    events++;
+    num_events++;
+
+    valuator_mask_copy(&mask, mask_in);
+
+    init_raw(pDev, raw, ms, type, buttons);
+    set_raw_valuators(raw, &mask, raw->valuators.data_raw);
+
+    if (flags & POINTER_ABSOLUTE)
+    {
+        if (flags & POINTER_SCREEN) /* valuators are in screen coords */
+        {
+            int scaled;
+
+            if (valuator_mask_isset(&mask, 0))
+            {
+                scaled = rescaleValuatorAxis(valuator_mask_get(&mask, 0),
+                                             0.0, &x_frac, NULL,
+                                             pDev->valuator->axes + 0,
+                                             scr->width);
+                valuator_mask_set(&mask, 0, scaled);
+            }
+            if (valuator_mask_isset(&mask, 1))
+            {
+                scaled = rescaleValuatorAxis(valuator_mask_get(&mask, 1),
+                                             0.0, &y_frac, NULL,
+                                             pDev->valuator->axes + 1,
+                                             scr->height);
+                valuator_mask_set(&mask, 1, scaled);
+            }
+        }
+
+        transformAbsolute(pDev, &mask);
+        moveAbsolute(pDev, &x, &y, &mask);
+    } else {
+        if (flags & POINTER_ACCELERATE) {
+            /* FIXME: Pointer acceleration only requires X and Y values. This
+             * should be converted to masked valuators. */
+            int vals[2];
+            vals[0] = valuator_mask_isset(&mask, 0) ?
+                      valuator_mask_get(&mask, 0) : 0;
+            vals[1] = valuator_mask_isset(&mask, 1) ?
+                      valuator_mask_get(&mask, 1) : 0;
+            accelPointer(pDev, 0, 2, vals, ms);
+
+            if (valuator_mask_isset(&mask, 0))
+                valuator_mask_set(&mask, 0, vals[0]);
+            if (valuator_mask_isset(&mask, 1))
+                valuator_mask_set(&mask, 1, vals[1]);
+
+            /* The pointer acceleration code modifies the fractional part
+             * in-place, so we need to extract this information first */
+            x_frac = pDev->last.remainder[0];
+            y_frac = pDev->last.remainder[1];
+        }
+        moveRelative(pDev, &x, &y, &mask);
+    }
+
+    set_raw_valuators(raw, &mask, raw->valuators.data);
+
+    positionSprite(pDev, &x, &y, x_frac, y_frac, scr, &cx, &cy, &cx_frac, &cy_frac);
+    updateHistory(pDev, &mask, ms);
+
+    /* Update the valuators with the true value sent to the client*/
+    if (valuator_mask_isset(&mask, 0))
+        valuator_mask_set(&mask, 0, x);
+    if (valuator_mask_isset(&mask, 1))
+        valuator_mask_set(&mask, 1, y);
+
+    clipValuators(pDev, &mask);
+
+    event = (DeviceEvent*) events->event;
+    init_event(pDev, event, ms);
+
+    if (type == MotionNotify) {
+        event->type = ET_Motion;
+        event->detail.button = 0;
+    }
+    else {
+        if (type == ButtonPress) {
+            event->type = ET_ButtonPress;
+            set_button_down(pDev, buttons, BUTTON_POSTED);
+        }
+        else if (type == ButtonRelease) {
+            event->type = ET_ButtonRelease;
+            set_button_up(pDev, buttons, BUTTON_POSTED);
+        }
+        event->detail.button = buttons;
+    }
+
+    event->root_x = cx; /* root_x/y always in screen coords */
+    event->root_y = cy;
+    event->root_x_frac = cx_frac;
+    event->root_y_frac = cy_frac;
+
+    set_valuators(pDev, event, &mask);
+
+    return num_events;
+}
+
+
+/**
+ * Generate ProximityIn/ProximityOut InternalEvents, accompanied by
+ * valuators.
+ *
+ * events is not NULL-terminated; the return value is the number of events.
+ * The DDX is responsible for allocating the event structure in the first
+ * place via GetMaximumEventsNum(), and for freeing it.
+ */
+int
+GetProximityEvents(EventList *events, DeviceIntPtr pDev, int type, const ValuatorMask *mask_in)
+{
+    int num_events = 1, i;
+    DeviceEvent *event;
+    ValuatorMask mask;
+
+    /* refuse events from disabled devices */
+    if (!pDev->enabled)
+        return 0;
+
+    /* Sanity checks. */
+    if ((type != ProximityIn && type != ProximityOut) || !mask_in)
+        return 0;
+    if (!pDev->valuator)
+        return 0;
+
+    valuator_mask_copy(&mask, mask_in);
+
+    /* ignore relative axes for proximity. */
+    for (i = 0; i < valuator_mask_size(&mask); i++)
+    {
+        if (valuator_mask_isset(&mask, i) &&
+            valuator_get_mode(pDev, i) == Relative)
+            valuator_mask_unset(&mask, i);
+    }
+
+    /* FIXME: posting proximity events with relative valuators only results
+     * in an empty event, EventToXI() will fail to convert → no event sent
+     * to client. */
+
+    events = UpdateFromMaster(events, pDev, DEVCHANGE_POINTER_EVENT, &num_events);
+
+    event = (DeviceEvent *) events->event;
+    init_event(pDev, event, GetTimeInMillis());
+    event->type = (type == ProximityIn) ? ET_ProximityIn : ET_ProximityOut;
+
+    clipValuators(pDev, &mask);
+
+    set_valuators(pDev, event, &mask);
+
+    return num_events;
+}
+
+/**
+ * Synthesize a single motion event for the core pointer.
+ *
+ * Used in cursor functions, e.g. when cursor confinement changes, and we need
+ * to shift the pointer to get it inside the new bounds.
+ */
+void
+PostSyntheticMotion(DeviceIntPtr pDev,
+                    int x,
+                    int y,
+                    int screen,
+                    unsigned long time)
+{
+    DeviceEvent ev;
+
+#ifdef PANORAMIX
+    /* Translate back to the sprite screen since processInputProc
+       will translate from sprite screen to screen 0 upon reentry
+       to the DIX layer. */
+    if (!noPanoramiXExtension) {
+        x += screenInfo.screens[0]->x - screenInfo.screens[screen]->x;
+        y += screenInfo.screens[0]->y - screenInfo.screens[screen]->y;
+    }
+#endif
+
+    memset(&ev, 0, sizeof(DeviceEvent));
+    init_event(pDev, &ev, time);
+    ev.root_x = x;
+    ev.root_y = y;
+    ev.type = ET_Motion;
+    ev.time = time;
+
+    /* FIXME: MD/SD considerations? */
+    (*pDev->public.processInputProc)((InternalEvent*)&ev, pDev);
+}