summaryrefslogtreecommitdiff
path: root/composite/compalloc.c
blob: 19c7db0b3fc9a4f58c796bc97ddad44361d4b660 (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
/*
 * Copyright © 2006 Sun Microsystems
 *
 * 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, and that the name of Sun Microsystems not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Sun Microsystems makes no
 * representations about the suitability of this software for any purpose.  It
 * is provided "as is" without express or implied warranty.
 *
 * SUN MICROSYSTEMS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL SUN MICROSYSTEMS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 *
 * Copyright © 2003 Keith Packard
 *
 * 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, and that the name of Keith Packard not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Keith Packard makes no
 * representations about the suitability of this software for any purpose.  It
 * is provided "as is" without express or implied warranty.
 *
 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

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

#include "compint.h"

static void
compReportDamage (DamagePtr pDamage, RegionPtr pRegion, void *closure)
{
    WindowPtr	    pWin = (WindowPtr) closure;
    ScreenPtr	    pScreen = pWin->drawable.pScreen;
    CompScreenPtr   cs = GetCompScreen (pScreen);
    CompWindowPtr   cw = GetCompWindow (pWin);

    cs->damaged = TRUE;
    cw->damaged = TRUE;
}

static void
compDestroyDamage (DamagePtr pDamage, void *closure)
{
    WindowPtr	    pWin = (WindowPtr) closure;
    CompWindowPtr   cw = GetCompWindow (pWin);

    cw->damage = 0;
}

/*
 * Redirect one window for one client
 */
int
compRedirectWindow (ClientPtr pClient, WindowPtr pWin, int update)
{
    CompWindowPtr	cw = GetCompWindow (pWin);
    CompClientWindowPtr	ccw;
    Bool		wasMapped = pWin->mapped;
    CompScreenPtr       cs = GetCompScreen(pWin->drawable.pScreen);
    
    if (pWin == cs->pOverlayWin) {
	return Success;
    }

    if (!pWin->parent)
	return BadMatch;

    /*
     * Only one Manual update is allowed
     */
    if (cw && update == CompositeRedirectManual)
	for (ccw = cw->clients; ccw; ccw = ccw->next)
	    if (ccw->update == CompositeRedirectManual)
		return BadAccess;
    
    /*
     * Allocate per-client per-window structure 
     * The client *could* allocate multiple, but while supported,
     * it is not expected to be common
     */
    ccw = xalloc (sizeof (CompClientWindowRec));
    if (!ccw)
	return BadAlloc;
    ccw->id = FakeClientID (pClient->index);
    ccw->update = update;
    /*
     * Now make sure there's a per-window structure to hang this from
     */
    if (!cw)
    {
	cw = xalloc (sizeof (CompWindowRec));
	if (!cw)
	{
	    xfree (ccw);
	    return BadAlloc;
	}
	cw->damage = DamageCreate (compReportDamage,
				   compDestroyDamage,
				   DamageReportNonEmpty,
				   FALSE,
				   pWin->drawable.pScreen,
				   pWin);
	if (!cw->damage)
	{
	    xfree (ccw);
	    xfree (cw);
	    return BadAlloc;
	}
	if (wasMapped)
	{
	    DisableMapUnmapEvents (pWin);
	    UnmapWindow (pWin, FALSE);
	    EnableMapUnmapEvents (pWin);
	}

	REGION_NULL (pScreen, &cw->borderClip);
	cw->update = CompositeRedirectAutomatic;
	cw->clients = 0;
	cw->oldx = COMP_ORIGIN_INVALID;
	cw->oldy = COMP_ORIGIN_INVALID;
	cw->damageRegistered = FALSE;
	cw->damaged = FALSE;
	dixSetPrivate(&pWin->devPrivates, CompWindowPrivateKey, cw);
    }
    ccw->next = cw->clients;
    cw->clients = ccw;
    if (!AddResource (ccw->id, CompositeClientWindowType, pWin))
	return BadAlloc;
    if (ccw->update == CompositeRedirectManual)
    {
	if (cw->damageRegistered)
	{
	    DamageUnregister (&pWin->drawable, cw->damage);
	    cw->damageRegistered = FALSE;
	}
	cw->update = CompositeRedirectManual;
    }

    if (!compCheckRedirect (pWin))
    {
	FreeResource (ccw->id, RT_NONE);
	return BadAlloc;
    }
    if (wasMapped && !pWin->mapped)
    {
	Bool	overrideRedirect = pWin->overrideRedirect;
	pWin->overrideRedirect = TRUE;
	DisableMapUnmapEvents (pWin);
	MapWindow (pWin, pClient);
	EnableMapUnmapEvents (pWin);
	pWin->overrideRedirect = overrideRedirect;
    }
    
    return Success;
}

/*
 * Free one of the per-client per-window resources, clearing
 * redirect and the per-window pointer as appropriate
 */
void
compFreeClientWindow (WindowPtr pWin, XID id)
{
    CompWindowPtr	cw = GetCompWindow (pWin);
    CompClientWindowPtr	ccw, *prev;
    Bool		wasMapped = pWin->mapped;

    if (!cw)
	return;
    for (prev = &cw->clients; (ccw = *prev); prev = &ccw->next)
    {
	if (ccw->id == id)
	{
	    *prev = ccw->next;
	    if (ccw->update == CompositeRedirectManual)
		cw->update = CompositeRedirectAutomatic;
	    xfree (ccw);
	    break;
	}
    }
    if (!cw->clients)
    {
	if (wasMapped)
	{
	    DisableMapUnmapEvents (pWin);
	    UnmapWindow (pWin, FALSE);
	    EnableMapUnmapEvents (pWin);
	}
    
	if (pWin->redirectDraw != RedirectDrawNone)
	    compFreePixmap (pWin);

	if (cw->damage)
	    DamageDestroy (cw->damage);
	
	REGION_UNINIT (pScreen, &cw->borderClip);
    
	dixSetPrivate(&pWin->devPrivates, CompWindowPrivateKey, NULL);
	xfree (cw);
    }
    else if (cw->update == CompositeRedirectAutomatic &&
	     !cw->damageRegistered && pWin->redirectDraw != RedirectDrawNone)
    {
	DamageRegister (&pWin->drawable, cw->damage);
	cw->damageRegistered = TRUE;
	pWin->redirectDraw = RedirectDrawAutomatic;
	DamageDamageRegion (&pWin->drawable, &pWin->borderSize);
    }
    if (wasMapped && !pWin->mapped)
    {
	Bool	overrideRedirect = pWin->overrideRedirect;
	pWin->overrideRedirect = TRUE;
	DisableMapUnmapEvents (pWin);
	MapWindow (pWin, clients[CLIENT_ID(id)]);
	EnableMapUnmapEvents (pWin);
	pWin->overrideRedirect = overrideRedirect;
    }
}

/*
 * This is easy, just free the appropriate resource.
 */

int
compUnredirectWindow (ClientPtr pClient, WindowPtr pWin, int update)
{
    CompWindowPtr	cw = GetCompWindow (pWin);
    CompClientWindowPtr	ccw;

    if (!cw)
	return BadValue;

    for (ccw = cw->clients; ccw; ccw = ccw->next)
	if (ccw->update == update && CLIENT_ID(ccw->id) == pClient->index)
	{
	    FreeResource (ccw->id, RT_NONE);
	    return Success;
	}
    return BadValue;
}
	
/*
 * Redirect all subwindows for one client
 */

int
compRedirectSubwindows (ClientPtr pClient, WindowPtr pWin, int update)
{
    CompSubwindowsPtr	csw = GetCompSubwindows (pWin);
    CompClientWindowPtr	ccw;
    WindowPtr		pChild;

    /*
     * Only one Manual update is allowed
     */
    if (csw && update == CompositeRedirectManual)
	for (ccw = csw->clients; ccw; ccw = ccw->next)
	    if (ccw->update == CompositeRedirectManual)
		return BadAccess;
    /*
     * Allocate per-client per-window structure 
     * The client *could* allocate multiple, but while supported,
     * it is not expected to be common
     */
    ccw = xalloc (sizeof (CompClientWindowRec));
    if (!ccw)
	return BadAlloc;
    ccw->id = FakeClientID (pClient->index);
    ccw->update = update;
    /*
     * Now make sure there's a per-window structure to hang this from
     */
    if (!csw)
    {
	csw = xalloc (sizeof (CompSubwindowsRec));
	if (!csw)
	{
	    xfree (ccw);
	    return BadAlloc;
	}
	csw->update = CompositeRedirectAutomatic;
	csw->clients = 0;
	dixSetPrivate(&pWin->devPrivates, CompSubwindowsPrivateKey, csw);
    }
    /*
     * Redirect all existing windows
     */
    for (pChild = pWin->lastChild; pChild; pChild = pChild->prevSib)
    {
	int ret = compRedirectWindow (pClient, pChild, update);
	if (ret != Success)
	{
	    for (pChild = pChild->nextSib; pChild; pChild = pChild->nextSib)
		(void) compUnredirectWindow (pClient, pChild, update);
	    if (!csw->clients)
	    {
		xfree (csw);
		dixSetPrivate(&pWin->devPrivates, CompSubwindowsPrivateKey, 0);
	    }
	    xfree (ccw);
	    return ret;
	}
    }
    /*
     * Hook into subwindows list
     */
    ccw->next = csw->clients;
    csw->clients = ccw;
    if (!AddResource (ccw->id, CompositeClientSubwindowsType, pWin))
	return BadAlloc;
    if (ccw->update == CompositeRedirectManual)
    {
	csw->update = CompositeRedirectManual;
	/* 
	 * tell damage extension that damage events for this client are
	 * critical output
	 */
	DamageExtSetCritical (pClient, TRUE);
    }
    return Success;
}

/*
 * Free one of the per-client per-subwindows resources,
 * which frees one redirect per subwindow
 */
void
compFreeClientSubwindows (WindowPtr pWin, XID id)
{
    CompSubwindowsPtr	csw = GetCompSubwindows (pWin);
    CompClientWindowPtr	ccw, *prev;
    WindowPtr		pChild;

    if (!csw)
	return;
    for (prev = &csw->clients; (ccw = *prev); prev = &ccw->next)
    {
	if (ccw->id == id)
	{
	    ClientPtr	pClient = clients[CLIENT_ID(id)];
	    
	    *prev = ccw->next;
	    if (ccw->update == CompositeRedirectManual)
	    {
		/* 
		 * tell damage extension that damage events for this client are
		 * critical output
		 */
		DamageExtSetCritical (pClient, FALSE);
		csw->update = CompositeRedirectAutomatic;
		if (pWin->mapped)
		    (*pWin->drawable.pScreen->ClearToBackground)(pWin, 0, 0, 0, 0, TRUE);
	    }

	    /*
	     * Unredirect all existing subwindows
	     */
	    for (pChild = pWin->lastChild; pChild; pChild = pChild->prevSib)
		(void) compUnredirectWindow (pClient, pChild, ccw->update);

	    xfree (ccw);
	    break;
	}
    }

    /*
     * Check if all of the per-client records are gone
     */
    if (!csw->clients)
    {
	dixSetPrivate(&pWin->devPrivates, CompSubwindowsPrivateKey, NULL);
	xfree (csw);
    }
}

/*
 * This is easy, just free the appropriate resource.
 */

int
compUnredirectSubwindows (ClientPtr pClient, WindowPtr pWin, int update)
{
    CompSubwindowsPtr	csw = GetCompSubwindows (pWin);
    CompClientWindowPtr	ccw;
    
    if (!csw)
	return BadValue;
    for (ccw = csw->clients; ccw; ccw = ccw->next)
	if (ccw->update == update && CLIENT_ID(ccw->id) == pClient->index)
	{
	    FreeResource (ccw->id, RT_NONE);
	    return Success;
	}
    return BadValue;
}

/*
 * Add redirection information for one subwindow (during reparent)
 */

int
compRedirectOneSubwindow (WindowPtr pParent, WindowPtr pWin)
{
    CompSubwindowsPtr	csw = GetCompSubwindows (pParent);
    CompClientWindowPtr	ccw;

    if (!csw)
	return Success;
    for (ccw = csw->clients; ccw; ccw = ccw->next)
    {
	int ret = compRedirectWindow (clients[CLIENT_ID(ccw->id)],
				      pWin, ccw->update);
	if (ret != Success)
	    return ret;
    }
    return Success;
}

/*
 * Remove redirection information for one subwindow (during reparent)
 */

int
compUnredirectOneSubwindow (WindowPtr pParent, WindowPtr pWin)
{
    CompSubwindowsPtr	csw = GetCompSubwindows (pParent);
    CompClientWindowPtr	ccw;

    if (!csw)
	return Success;
    for (ccw = csw->clients; ccw; ccw = ccw->next)
    {
	int ret = compUnredirectWindow (clients[CLIENT_ID(ccw->id)],
					pWin, ccw->update);
	if (ret != Success)
	    return ret;
    }
    return Success;
}

static PixmapPtr
compNewPixmap (WindowPtr pWin, int x, int y, int w, int h)
{
    ScreenPtr	    pScreen = pWin->drawable.pScreen;
    WindowPtr	    pParent = pWin->parent;
    PixmapPtr	    pPixmap;

    pPixmap = (*pScreen->CreatePixmap) (pScreen, w, h, pWin->drawable.depth,
					CREATE_PIXMAP_USAGE_BACKING_PIXMAP);

    if (!pPixmap)
	return 0;
    
    pPixmap->screen_x = x;
    pPixmap->screen_y = y;
    
    if (pParent->drawable.depth == pWin->drawable.depth)
    {
	GCPtr	pGC = GetScratchGC (pWin->drawable.depth, pScreen);
	
	/*
	 * Copy bits from the parent into the new pixmap so that it will
	 * have "reasonable" contents in case for background None areas.
	 */
	if (pGC)
	{
	    XID val = IncludeInferiors;
	    
	    ValidateGC(&pPixmap->drawable, pGC);
	    dixChangeGC (serverClient, pGC, GCSubwindowMode, &val, NULL);
	    (*pGC->ops->CopyArea) (&pParent->drawable,
				   &pPixmap->drawable,
				   pGC,
				   x - pParent->drawable.x,
				   y - pParent->drawable.y,
				   w, h, 0, 0);
	    FreeScratchGC (pGC);
	}
    }
    else
    {
	PictFormatPtr	pSrcFormat = compWindowFormat (pParent);
	PictFormatPtr	pDstFormat = compWindowFormat (pWin);
	XID		inferiors = IncludeInferiors;
	int		error;

	PicturePtr	pSrcPicture = CreatePicture (None,
						     &pParent->drawable,
						     pSrcFormat,
						     CPSubwindowMode,
						     &inferiors,
						     serverClient, &error);
						    
	PicturePtr	pDstPicture = CreatePicture (None,
						     &pPixmap->drawable,
						     pDstFormat,
						     0, 0,
						     serverClient, &error);

	if (pSrcPicture && pDstPicture)
	{
	    CompositePicture (PictOpSrc,
			      pSrcPicture,
			      NULL,
			      pDstPicture,
			      x - pParent->drawable.x,
			      y - pParent->drawable.y,
			      0, 0, 0, 0, w, h);
	}
	if (pSrcPicture)
	    FreePicture (pSrcPicture, 0);
	if (pDstPicture)
	    FreePicture (pDstPicture, 0);
    }
    return pPixmap;
}

Bool
compAllocPixmap (WindowPtr pWin)
{
    int		    bw = (int) pWin->borderWidth;
    int		    x = pWin->drawable.x - bw;
    int		    y = pWin->drawable.y - bw;
    int		    w = pWin->drawable.width + (bw << 1);
    int		    h = pWin->drawable.height + (bw << 1);
    PixmapPtr	    pPixmap = compNewPixmap (pWin, x, y, w, h);
    CompWindowPtr   cw = GetCompWindow (pWin);

    if (!pPixmap)
	return FALSE;
    if (cw->update == CompositeRedirectAutomatic)
	pWin->redirectDraw = RedirectDrawAutomatic;
    else
	pWin->redirectDraw = RedirectDrawManual;

    compSetPixmap (pWin, pPixmap);
    cw->oldx = COMP_ORIGIN_INVALID;
    cw->oldy = COMP_ORIGIN_INVALID;
    cw->damageRegistered = FALSE;
    if (cw->update == CompositeRedirectAutomatic)
    {
	DamageRegister (&pWin->drawable, cw->damage);
	cw->damageRegistered = TRUE;
    }
    return TRUE;
}

void
compFreePixmap (WindowPtr pWin)
{
    ScreenPtr	    pScreen = pWin->drawable.pScreen;
    PixmapPtr	    pRedirectPixmap, pParentPixmap;
    CompWindowPtr   cw = GetCompWindow (pWin);

    if (cw->damageRegistered)
    {
	DamageUnregister (&pWin->drawable, cw->damage);
	cw->damageRegistered = FALSE;
	DamageEmpty (cw->damage);
    }
    /*
     * Move the parent-constrained border clip region back into
     * the window so that ValidateTree will handle the unmap
     * case correctly.  Unmap adds the window borderClip to the
     * parent exposed area; regions beyond the parent cause crashes
     */
    REGION_COPY (pScreen, &pWin->borderClip, &cw->borderClip);
    pRedirectPixmap = (*pScreen->GetWindowPixmap) (pWin);
    pParentPixmap = (*pScreen->GetWindowPixmap) (pWin->parent);
    pWin->redirectDraw = RedirectDrawNone;
    compSetPixmap (pWin, pParentPixmap);
    (*pScreen->DestroyPixmap) (pRedirectPixmap);
}

/*
 * Make sure the pixmap is the right size and offset.  Allocate a new
 * pixmap to change size, adjust origin to change offset, leaving the
 * old pixmap in cw->pOldPixmap so bits can be recovered
 */
Bool
compReallocPixmap (WindowPtr pWin, int draw_x, int draw_y,
		   unsigned int w, unsigned int h, int bw)
{
    ScreenPtr	    pScreen = pWin->drawable.pScreen;
    PixmapPtr	    pOld = (*pScreen->GetWindowPixmap) (pWin);
    PixmapPtr	    pNew;
    CompWindowPtr   cw = GetCompWindow (pWin);
    int		    pix_x, pix_y;
    int		    pix_w, pix_h;

    assert (cw && pWin->redirectDraw != RedirectDrawNone);
    cw->oldx = pOld->screen_x;
    cw->oldy = pOld->screen_y;
    pix_x = draw_x - bw;
    pix_y = draw_y - bw;
    pix_w = w + (bw << 1);
    pix_h = h + (bw << 1);
    if (pix_w != pOld->drawable.width || pix_h != pOld->drawable.height)
    {
	pNew = compNewPixmap (pWin, pix_x, pix_y, pix_w, pix_h);
	if (!pNew)
	    return FALSE;
	cw->pOldPixmap = pOld;
	compSetPixmap (pWin, pNew);
    }
    else
    {
	pNew = pOld;
	cw->pOldPixmap = 0;
    }
    pNew->screen_x = pix_x;
    pNew->screen_y = pix_y;
    return TRUE;
}