aboutsummaryrefslogtreecommitdiff
path: root/xorg-server/mi/mipointer.c
blob: 7680ca19b12e3464e699d09d951499d66f4c3255 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
/*

Copyright 1989, 1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.

The above copyright notice and this permission notice 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
OPEN GROUP 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.

Except as contained in this notice, the name of The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.
*/

/**
 * @file
 * This file contains functions to move the pointer on the screen and/or
 * restrict its movement. These functions are divided into two sets:
 * Screen-specific functions that are used as function pointers from other
 * parts of the server (and end up heavily wrapped by e.g. animcur and
 * xfixes):
 *      miPointerConstrainCursor
 *      miPointerCursorLimits
 *      miPointerDisplayCursor
 *      miPointerRealizeCursor
 *      miPointerUnrealizeCursor
 *      miPointerSetCursorPosition
 *      miRecolorCursor
 *      miPointerDeviceInitialize
 *      miPointerDeviceCleanup
 * If wrapped, these are the last element in the wrapping chain. They may
 * call into sprite-specific code through further function pointers though.
 *
 * The second type of functions are those that are directly called by the
 * DIX, DDX and some drivers.
 */

#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

# include   <X11/X.h>
# include   <X11/Xmd.h>
# include   <X11/Xproto.h>
# include   "misc.h"
# include   "windowstr.h"
# include   "pixmapstr.h"
# include   "mi.h"
# include   "scrnintstr.h"
# include   "mipointrst.h"
# include   "cursorstr.h"
# include   "dixstruct.h"
# include   "inputstr.h"
# include   "inpututils.h"
# include   "eventstr.h"

DevPrivateKeyRec miPointerScreenKeyRec;

#define GetScreenPrivate(s) ((miPointerScreenPtr) \
    dixLookupPrivate(&(s)->devPrivates, miPointerScreenKey))
#define SetupScreen(s)	miPointerScreenPtr  pScreenPriv = GetScreenPrivate(s)

DevPrivateKeyRec miPointerPrivKeyRec;

#define MIPOINTER(dev) \
    (IsFloating(dev) ? \
        (miPointerPtr)dixLookupPrivate(&(dev)->devPrivates, miPointerPrivKey): \
        (miPointerPtr)dixLookupPrivate(&(GetMaster(dev, MASTER_POINTER))->devPrivates, miPointerPrivKey))

static Bool miPointerRealizeCursor(DeviceIntPtr pDev, ScreenPtr pScreen, 
                                   CursorPtr pCursor);
static Bool miPointerUnrealizeCursor(DeviceIntPtr pDev, ScreenPtr pScreen, 
                                     CursorPtr pCursor);
static Bool miPointerDisplayCursor(DeviceIntPtr pDev, ScreenPtr pScreen, 
                                   CursorPtr pCursor);
static void miPointerConstrainCursor(DeviceIntPtr pDev, ScreenPtr pScreen,
                                     BoxPtr pBox); 
static void miPointerCursorLimits(DeviceIntPtr pDev, ScreenPtr pScreen,
                                  CursorPtr pCursor, BoxPtr pHotBox, 
                                  BoxPtr pTopLeftBox);
static Bool miPointerSetCursorPosition(DeviceIntPtr pDev, ScreenPtr pScreen, 
                                       int x, int y,
				       Bool generateEvent);
static Bool miPointerCloseScreen(int index, ScreenPtr pScreen);
static void miPointerMove(DeviceIntPtr pDev, ScreenPtr pScreen, 
                          int x, int y);
static Bool miPointerDeviceInitialize(DeviceIntPtr pDev, ScreenPtr pScreen);
static void miPointerDeviceCleanup(DeviceIntPtr pDev,
                                   ScreenPtr pScreen);
static void miPointerMoveNoEvent (DeviceIntPtr pDev, ScreenPtr pScreen, int x, int y);

static InternalEvent* events; /* for WarpPointer MotionNotifies */

Bool
miPointerInitialize (ScreenPtr                  pScreen,
                     miPointerSpriteFuncPtr     spriteFuncs,
                     miPointerScreenFuncPtr     screenFuncs,
                     Bool                       waitForUpdate)
{
    miPointerScreenPtr	pScreenPriv;

    if (!dixRegisterPrivateKey(&miPointerScreenKeyRec, PRIVATE_SCREEN, 0))
	return FALSE;

    if (!dixRegisterPrivateKey(&miPointerPrivKeyRec, PRIVATE_DEVICE, 0))
	return FALSE;

    pScreenPriv = malloc(sizeof (miPointerScreenRec));
    if (!pScreenPriv)
	return FALSE;
    pScreenPriv->spriteFuncs = spriteFuncs;
    pScreenPriv->screenFuncs = screenFuncs;
    /*
     * check for uninitialized methods
     */
    if (!screenFuncs->EnqueueEvent)
	screenFuncs->EnqueueEvent = mieqEnqueue;
    if (!screenFuncs->NewEventScreen)
	screenFuncs->NewEventScreen = mieqSwitchScreen;
    pScreenPriv->waitForUpdate = waitForUpdate;
    pScreenPriv->showTransparent = FALSE;
    pScreenPriv->CloseScreen = pScreen->CloseScreen;
    pScreen->CloseScreen = miPointerCloseScreen;
    dixSetPrivate(&pScreen->devPrivates, miPointerScreenKey, pScreenPriv);
    /*
     * set up screen cursor method table
     */
    pScreen->ConstrainCursor = miPointerConstrainCursor;
    pScreen->CursorLimits = miPointerCursorLimits;
    pScreen->DisplayCursor = miPointerDisplayCursor;
    pScreen->RealizeCursor = miPointerRealizeCursor;
    pScreen->UnrealizeCursor = miPointerUnrealizeCursor;
    pScreen->SetCursorPosition = miPointerSetCursorPosition;
    pScreen->RecolorCursor = miRecolorCursor;
    pScreen->DeviceCursorInitialize = miPointerDeviceInitialize;
    pScreen->DeviceCursorCleanup = miPointerDeviceCleanup;

    events = NULL;
    return TRUE;
}

/**
 * Destroy screen-specific information.
 *
 * @param index Screen index of the screen in screenInfo.screens[]
 * @param pScreen The actual screen pointer
 */
static Bool
miPointerCloseScreen (int index, ScreenPtr pScreen)
{
    SetupScreen(pScreen);

    pScreen->CloseScreen = pScreenPriv->CloseScreen;
    free((pointer) pScreenPriv);
    FreeEventList(events, GetMaximumEventsNum());
    events = NULL;
    return (*pScreen->CloseScreen) (index, pScreen);
}

/*
 * DIX/DDX interface routines
 */

static Bool
miPointerRealizeCursor (DeviceIntPtr pDev, ScreenPtr pScreen, CursorPtr pCursor)
{
    SetupScreen(pScreen);
    return (*pScreenPriv->spriteFuncs->RealizeCursor) (pDev, pScreen, pCursor);
}

static Bool
miPointerUnrealizeCursor (DeviceIntPtr  pDev,
                          ScreenPtr     pScreen,
                          CursorPtr     pCursor)
{
    SetupScreen(pScreen);
    return (*pScreenPriv->spriteFuncs->UnrealizeCursor) (pDev, pScreen, pCursor);
}

static Bool
miPointerDisplayCursor (DeviceIntPtr pDev, ScreenPtr pScreen, CursorPtr pCursor)
{
    miPointerPtr pPointer;

    /* return for keyboards */
    if (!IsPointerDevice(pDev))
            return FALSE;

    pPointer = MIPOINTER(pDev);

    pPointer->pCursor = pCursor;
    pPointer->pScreen = pScreen;
    miPointerUpdateSprite(pDev);
    return TRUE;
}

/**
 * Set up the constraints for the given device. This function does not
 * actually constrain the cursor but merely copies the given box to the
 * internal constraint storage.
 *
 * @param pDev The device to constrain to the box
 * @param pBox The rectangle to constrain the cursor to
 * @param pScreen Used for copying screen confinement
 */
static void
miPointerConstrainCursor (DeviceIntPtr pDev, ScreenPtr pScreen, BoxPtr pBox)
{
    miPointerPtr pPointer;

    pPointer = MIPOINTER(pDev);

    pPointer->limits = *pBox;
    pPointer->confined = PointerConfinedToScreen(pDev);
}

/**
 * Should calculate the box for the given cursor, based on screen and the
 * confinement given. But we assume that whatever box is passed in is valid
 * anyway.
 *
 * @param pDev The device to calculate the cursor limits for
 * @param pScreen The screen the confinement happens on
 * @param pCursor The screen the confinement happens on
 * @param pHotBox The confinement box for the cursor
 * @param[out] pTopLeftBox The new confinement box, always *pHotBox.
 */
static void
miPointerCursorLimits(DeviceIntPtr pDev, ScreenPtr pScreen, CursorPtr pCursor,
                      BoxPtr pHotBox, BoxPtr pTopLeftBox)
{
    *pTopLeftBox = *pHotBox;
}

/**
 * Set the device's cursor position to the x/y position on the given screen.
 * Generates and event if required.
 *
 * This function is called from:
 *    - sprite init code to place onto initial position
 *    - the various WarpPointer implementations (core, XI, Xinerama, dmx,…)
 *    - during the cursor update path in CheckMotion
 *    - in the Xinerama part of NewCurrentScreen
 *    - when a RandR/RandR1.2 mode was applied (it may have moved the pointer, so
 *      it's set back to the original pos)
 *
 * @param pDev The device to move
 * @param pScreen The screen the device is on
 * @param x The x coordinate in per-screen coordinates
 * @param y The y coordinate in per-screen coordinates
 * @param generateEvent True if the pointer movement should generate an
 * event.
 *
 * @return TRUE in all cases
 */
static Bool
miPointerSetCursorPosition(DeviceIntPtr pDev, ScreenPtr pScreen,
                           int x, int y, Bool generateEvent)
{
    SetupScreen (pScreen);
    miPointerPtr pPointer = MIPOINTER(pDev);

    pPointer->generateEvent = generateEvent;

    if (pScreen->ConstrainCursorHarder)
	pScreen->ConstrainCursorHarder(pDev, pScreen, Absolute, &x, &y);

    /* device dependent - must pend signal and call miPointerWarpCursor */
    (*pScreenPriv->screenFuncs->WarpCursor) (pDev, pScreen, x, y);
    if (!generateEvent)
	miPointerUpdateSprite(pDev);
    return TRUE;
}

/**
 * Set up sprite information for the device.
 * This function will be called once for each device after it is initialized
 * in the DIX.
 *
 * @param pDev The newly created device
 * @param pScreen The initial sprite scree.
 */
static Bool
miPointerDeviceInitialize(DeviceIntPtr pDev, ScreenPtr pScreen)
{
    miPointerPtr pPointer;
    SetupScreen (pScreen);

    pPointer = malloc(sizeof(miPointerRec));
    if (!pPointer)
        return FALSE;

    pPointer->pScreen = NULL;
    pPointer->pSpriteScreen = NULL;
    pPointer->pCursor = NULL;
    pPointer->pSpriteCursor = NULL;
    pPointer->limits.x1 = 0;
    pPointer->limits.x2 = 32767;
    pPointer->limits.y1 = 0;
    pPointer->limits.y2 = 32767;
    pPointer->confined = FALSE;
    pPointer->x = 0;
    pPointer->y = 0;
    pPointer->generateEvent = FALSE;

    if (!((*pScreenPriv->spriteFuncs->DeviceCursorInitialize)(pDev, pScreen)))
    {
        free(pPointer);
        return FALSE;
    }

    dixSetPrivate(&pDev->devPrivates, miPointerPrivKey, pPointer);
    return TRUE;
}

/**
 * Clean up after device.
 * This function will be called once before the device is freed in the DIX
 *
 * @param pDev The device to be removed from the server
 * @param pScreen Current screen of the device
 */
static void
miPointerDeviceCleanup(DeviceIntPtr pDev, ScreenPtr pScreen)
{
    SetupScreen(pScreen);

    if (!IsMaster(pDev) && !IsFloating(pDev))
        return;

    (*pScreenPriv->spriteFuncs->DeviceCursorCleanup)(pDev, pScreen);
    free(dixLookupPrivate(&pDev->devPrivates, miPointerPrivKey));
    dixSetPrivate(&pDev->devPrivates, miPointerPrivKey, NULL);
}


/**
 * Warp the pointer to the given position on the given screen. May generate
 * an event, depending on whether we're coming from miPointerSetPosition.
 *
 * Once signals are ignored, the WarpCursor function can call this
 *
 * @param pDev The device to warp
 * @param pScreen Screen to warp on
 * @param x The x coordinate in per-screen coordinates
 * @param y The y coordinate in per-screen coordinates
 */

void
miPointerWarpCursor (DeviceIntPtr pDev, ScreenPtr pScreen, int x, int y)
{
    miPointerPtr pPointer;
    BOOL changedScreen = FALSE;

    SetupScreen (pScreen);
    pPointer = MIPOINTER(pDev);

    if (pPointer->pScreen != pScreen)
    {
	(*pScreenPriv->screenFuncs->NewEventScreen) (pDev, pScreen, TRUE);
        changedScreen = TRUE;
    }

    if (pPointer->generateEvent)
	miPointerMove (pDev, pScreen, x, y);
    else
        miPointerMoveNoEvent(pDev, pScreen, x, y);

    /* Don't call USFS if we use Xinerama, otherwise the root window is
     * updated to the second screen, and we never receive any events.
     * (FDO bug #18668) */
    if (changedScreen
#ifdef PANORAMIX
            && noPanoramiXExtension
#endif
       )
        UpdateSpriteForScreen (pDev, pScreen) ;
}

/**
 * Syncronize the sprite with the cursor.
 *
 * @param pDev The device to sync
 */
void
miPointerUpdateSprite (DeviceIntPtr pDev)
{
    ScreenPtr		pScreen;
    miPointerScreenPtr	pScreenPriv;
    CursorPtr		pCursor;
    int			x, y, devx, devy;
    miPointerPtr        pPointer;

    if (!pDev || !pDev->coreEvents)
        return;

    pPointer = MIPOINTER(pDev);

    if (!pPointer)
        return;

    pScreen = pPointer->pScreen;
    if (!pScreen)
	return;

    x = pPointer->x;
    y = pPointer->y;
    devx = pPointer->devx;
    devy = pPointer->devy;

    pScreenPriv = GetScreenPrivate (pScreen);
    /*
     * if the cursor has switched screens, disable the sprite
     * on the old screen
     */
    if (pScreen != pPointer->pSpriteScreen)
    {
	if (pPointer->pSpriteScreen)
	{
	    miPointerScreenPtr  pOldPriv;
    	
	    pOldPriv = GetScreenPrivate (pPointer->pSpriteScreen);
	    if (pPointer->pCursor)
	    {
	    	(*pOldPriv->spriteFuncs->SetCursor)
			    	(pDev, pPointer->pSpriteScreen, NullCursor, 0, 0);
	    }
	    (*pOldPriv->screenFuncs->CrossScreen) (pPointer->pSpriteScreen, FALSE);
	}
	(*pScreenPriv->screenFuncs->CrossScreen) (pScreen, TRUE);
	(*pScreenPriv->spriteFuncs->SetCursor)
				(pDev, pScreen, pPointer->pCursor, x, y);
	pPointer->devx = x;
	pPointer->devy = y;
	pPointer->pSpriteCursor = pPointer->pCursor;
	pPointer->pSpriteScreen = pScreen;
    }
    /*
     * if the cursor has changed, display the new one
     */
    else if (pPointer->pCursor != pPointer->pSpriteCursor)
    {
	pCursor = pPointer->pCursor;
	if (!pCursor || (pCursor->bits->emptyMask && !pScreenPriv->showTransparent))
	    pCursor = NullCursor;
	(*pScreenPriv->spriteFuncs->SetCursor) (pDev, pScreen, pCursor, x, y);

	pPointer->devx = x;
	pPointer->devy = y;
	pPointer->pSpriteCursor = pPointer->pCursor;
    }
    else if (x != devx || y != devy)
    {
	pPointer->devx = x;
	pPointer->devy = y;
	if(pPointer->pCursor && !pPointer->pCursor->bits->emptyMask)
	    (*pScreenPriv->spriteFuncs->MoveCursor) (pDev, pScreen, x, y);
    }
}

/**
 * Set the device to the coordinates on the given screen.
 *
 * @param pDev The device to move
 * @param screen_no Index of the screen to move to
 * @param x The x coordinate in per-screen coordinates
 * @param y The y coordinate in per-screen coordinates
 */
void
miPointerSetScreen(DeviceIntPtr pDev, int screen_no, int x, int y)
{
	miPointerScreenPtr pScreenPriv;
	ScreenPtr pScreen;
        miPointerPtr pPointer;

        pPointer = MIPOINTER(pDev);

	pScreen = screenInfo.screens[screen_no];
	pScreenPriv = GetScreenPrivate (pScreen);
	(*pScreenPriv->screenFuncs->NewEventScreen) (pDev, pScreen, FALSE);
	NewCurrentScreen (pDev, pScreen, x, y);

        pPointer->limits.x2 = pScreen->width;
        pPointer->limits.y2 = pScreen->height;
}

/**
 * @return The current screen of the VCP
 */
ScreenPtr
miPointerCurrentScreen (void)
{
    return miPointerGetScreen(inputInfo.pointer);
}

/**
 * @return The current screen of the given device or NULL.
 */
ScreenPtr
miPointerGetScreen(DeviceIntPtr pDev)
{
    miPointerPtr pPointer = MIPOINTER(pDev);
    return (pPointer) ? pPointer->pScreen : NULL;
}

/* Controls whether the cursor image should be updated immediately when
   moved (FALSE) or if something else will be responsible for updating
   it later (TRUE).  Returns current setting.
   Caller is responsible for calling OsBlockSignal first.
*/
Bool
miPointerSetWaitForUpdate(ScreenPtr pScreen, Bool wait)
{
    SetupScreen(pScreen);
    Bool prevWait = pScreenPriv->waitForUpdate;

    pScreenPriv->waitForUpdate = wait;
    return prevWait;
}


/* Move the pointer on the current screen,  and update the sprite. */
static void
miPointerMoveNoEvent (DeviceIntPtr pDev, ScreenPtr pScreen,
                int x, int y)
{
    miPointerPtr pPointer;
    SetupScreen(pScreen);

    pPointer = MIPOINTER(pDev);

    /* Hack: We mustn't call into ->MoveCursor for anything but the
     * VCP, as this may cause a non-HW rendered cursor to be rendered during
     * SIGIO. This again leads to allocs during SIGIO which leads to SIGABRT.
     */
    if (GetMaster(pDev, MASTER_POINTER) == inputInfo.pointer
        && !pScreenPriv->waitForUpdate && pScreen == pPointer->pSpriteScreen)
    {
	pPointer->devx = x;
	pPointer->devy = y;
	if(pPointer->pCursor && !pPointer->pCursor->bits->emptyMask)
	    (*pScreenPriv->spriteFuncs->MoveCursor) (pDev, pScreen, x, y);
    }

    pPointer->x = x;
    pPointer->y = y;
    pPointer->pScreen = pScreen;
}

/**
 * Set the devices' cursor position to the given x/y position.
 *
 * This function is called during the pointer update path in
 * GetPointerEvents and friends (and the same in the xwin DDX).
 *
 * The coordinates provided are always absolute. The parameter mode whether
 * it was relative or absolute movement that landed us at those coordinates.
 *
 * @param pDev The device to move
 * @param mode Movement mode (Absolute or Relative)
 * @param[in,out] x The x coordiante in screen coordinates (in regards to total
 * desktop size)
 * @param[in,out] y The y coordiante in screen coordinates (in regards to total
 * desktop size)
 */
void
miPointerSetPosition(DeviceIntPtr pDev, int mode, int *x, int *y)
{
    miPointerScreenPtr	pScreenPriv;
    ScreenPtr		pScreen;
    ScreenPtr		newScreen;

    miPointerPtr        pPointer; 

    if (!pDev || !pDev->coreEvents)
        return;

    pPointer = MIPOINTER(pDev);
    pScreen = pPointer->pScreen;
    if (!pScreen)
	return;	    /* called before ready */

    if (*x < 0 || *x >= pScreen->width || *y < 0 || *y >= pScreen->height)
    {
	pScreenPriv = GetScreenPrivate (pScreen);
	if (!pPointer->confined)
	{
	    newScreen = pScreen;
	    (*pScreenPriv->screenFuncs->CursorOffScreen) (&newScreen, x, y);
	    if (newScreen != pScreen)
	    {
		pScreen = newScreen;
		(*pScreenPriv->screenFuncs->NewEventScreen) (pDev, pScreen,
							     FALSE);
	    	/* Smash the confine to the new screen */
                pPointer->limits.x2 = pScreen->width;
                pPointer->limits.y2 = pScreen->height;
	    }
	}
    }
    /* Constrain the sprite to the current limits. */
    if (*x < pPointer->limits.x1)
	*x = pPointer->limits.x1;
    if (*x >= pPointer->limits.x2)
	*x = pPointer->limits.x2 - 1;
    if (*y < pPointer->limits.y1)
	*y = pPointer->limits.y1;
    if (*y >= pPointer->limits.y2)
	*y = pPointer->limits.y2 - 1;

    if (pScreen->ConstrainCursorHarder)
       pScreen->ConstrainCursorHarder(pDev, pScreen, mode, x, y);

    if (pPointer->x == *x && pPointer->y == *y && 
            pPointer->pScreen == pScreen) 
        return;

    miPointerMoveNoEvent(pDev, pScreen, *x, *y);
}

/**
 * Get the current position of the device in desktop coordinates.
 *
 * @param x Return value for the current x coordinate in desktop coordiates.
 * @param y Return value for the current y coordinate in desktop coordiates.
 */
void
miPointerGetPosition(DeviceIntPtr pDev, int *x, int *y)
{
    *x = MIPOINTER(pDev)->x;
    *y = MIPOINTER(pDev)->y;
}

#ifdef XQUARTZ
#include <pthread.h>
void darwinEvents_lock(void);
void darwinEvents_unlock(void);
#endif

/**
 * Move the device's pointer to the x/y coordinates on the given screen.
 * This function generates and enqueues pointer events.
 *
 * @param pDev The device to move
 * @param pScreen The screen the device is on
 * @param x The x coordinate in per-screen coordinates
 * @param y The y coordinate in per-screen coordinates
 */
void
miPointerMove (DeviceIntPtr pDev, ScreenPtr pScreen, int x, int y)
{
    int i, nevents;
    int valuators[2];
    ValuatorMask mask;

    miPointerMoveNoEvent(pDev, pScreen, x, y);

    /* generate motion notify */
    valuators[0] = x;
    valuators[1] = y;

    if (!events)
    {
        events = InitEventList(GetMaximumEventsNum());

        if (!events)
        {
            FatalError("Could not allocate event store.\n");
            return;
        }
    }

    valuator_mask_set_range(&mask, 0, 2, valuators);
    nevents = GetPointerEvents(events, pDev, MotionNotify, 0,
                               POINTER_SCREEN | POINTER_ABSOLUTE | POINTER_NORAW, &mask);

    OsBlockSignals();
#ifdef XQUARTZ
    darwinEvents_lock();
#endif
    for (i = 0; i < nevents; i++)
        mieqEnqueue(pDev, &events[i]);
#ifdef XQUARTZ
    darwinEvents_unlock();
#endif
    OsReleaseSignals();
}