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
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
|
/* -- xdamage.c -- */
#include "x11vnc.h"
#include "xwrappers.h"
#include "userinput.h"
#include "unixpw.h"
#if LIBVNCSERVER_HAVE_LIBXDAMAGE
Damage xdamage = 0;
#endif
#ifndef XDAMAGE
#define XDAMAGE 1
#endif
int use_xdamage = XDAMAGE; /* use the xdamage rects for scanline hints */
int xdamage_present = 0;
#ifdef MACOSX
int xdamage_max_area = 50000;
#else
int xdamage_max_area = 20000; /* pixels */
#endif
double xdamage_memory = 1.0; /* in units of NSCAN */
int xdamage_tile_count = 0, xdamage_direct_count = 0;
double xdamage_scheduled_mark = 0.0;
sraRegionPtr xdamage_scheduled_mark_region = NULL;
sraRegionPtr *xdamage_regions = NULL;
int xdamage_ticker = 0;
int XD_skip = 0, XD_tot = 0, XD_des = 0; /* for stats */
void add_region_xdamage(sraRegionPtr new_region);
void clear_xdamage_mark_region(sraRegionPtr markregion, int flush);
int collect_macosx_damage(int x_in, int y_in, int w_in, int h_in, int call);
int collect_xdamage(int scancnt, int call);
int xdamage_hint_skip(int y);
void initialize_xdamage(void);
void create_xdamage_if_needed(void);
void destroy_xdamage_if_needed(void);
void check_xdamage_state(void);
static void record_desired_xdamage_rect(int x, int y, int w, int h);
static void record_desired_xdamage_rect(int x, int y, int w, int h) {
/*
* Unfortunately we currently can't trust an xdamage event
* to correspond to real screen damage. E.g. focus-in for
* mozilla (depending on wm) will mark the whole toplevel
* area as damaged, when only the border has changed.
* Similar things for terminal windows.
*
* This routine uses some heuristics to detect small enough
* damage regions that we will not have a performance problem
* if we believe them even though they are wrong. We record
* the corresponding tiles the damage regions touch.
*/
int dt_x, dt_y, nt_x1, nt_y1, nt_x2, nt_y2, nt;
int ix, iy, cnt = 0;
int area = w*h, always_accept = 0;
/*
* XXX: not working yet, slow and overlaps with scan_display()
* probably slow because tall skinny rectangles very inefficient
* in general and in direct_fb_copy() (100X slower then horizontal).
*/
int use_direct_fb_copy = 0;
int wh_min, wh_max;
static int first = 1, udfb = 0;
/* compiler warning: */
nt_x1 = 0; nt_y1 = 0; nt_x2 = 0; nt_y2 = 0;
if (first) {
if (getenv("XD_DFC")) {
udfb = 1;
}
first = 0;
}
if (udfb) {
use_direct_fb_copy = 1;
}
if (xdamage_max_area <= 0) {
always_accept = 1;
}
if (!always_accept && area > xdamage_max_area) {
return;
}
dt_x = w / tile_x;
dt_y = h / tile_y;
if (w < h) {
wh_min = w;
wh_max = h;
} else {
wh_min = h;
wh_max = w;
}
if (!always_accept && dt_y >= 3 && area > 4000) {
/*
* if it is real it should be caught by a normal scanline
* poll, but we might as well keep if small (tall line?).
*/
return;
}
if (use_direct_fb_copy) {
X_UNLOCK;
direct_fb_copy(x, y, x + w, y + h, 1);
xdamage_direct_count++;
X_LOCK;
} else if (0 && wh_min < tile_x/4 && wh_max > 30 * wh_min) {
/* try it for long, skinny rects, XXX still no good */
X_UNLOCK;
direct_fb_copy(x, y, x + w, y + h, 1);
xdamage_direct_count++;
X_LOCK;
} else {
nt_x1 = nfix( (x)/tile_x, ntiles_x);
nt_x2 = nfix((x+w)/tile_x, ntiles_x);
nt_y1 = nfix( (y)/tile_y, ntiles_y);
nt_y2 = nfix((y+h)/tile_y, ntiles_y);
/*
* loop over the rectangle of tiles (1 tile for a small
* input rect).
*/
for (ix = nt_x1; ix <= nt_x2; ix++) {
for (iy = nt_y1; iy <= nt_y2; iy++) {
nt = ix + iy * ntiles_x;
cnt++;
if (! tile_has_xdamage_diff[nt]) {
XD_des++;
tile_has_xdamage_diff[nt] = 1;
}
/* not used: */
tile_row_has_xdamage_diff[iy] = 1;
xdamage_tile_count++;
}
}
}
if (debug_xdamage > 1) {
fprintf(stderr, "xdamage: desired: %dx%d+%d+%d\tA: %6d tiles="
"%02d-%02d/%02d-%02d tilecnt: %d\n", w, h, x, y,
w * h, nt_x1, nt_x2, nt_y1, nt_y2, cnt);
}
}
void add_region_xdamage(sraRegionPtr new_region) {
sraRegionPtr reg;
int prev_tick, nreg;
if (! xdamage_regions) {
return;
}
nreg = (xdamage_memory * NSCAN) + 1;
prev_tick = xdamage_ticker - 1;
if (prev_tick < 0) {
prev_tick = nreg - 1;
}
reg = xdamage_regions[prev_tick];
if (reg != NULL && new_region != NULL) {
if (debug_xdamage > 1) fprintf(stderr, "add_region_xdamage: prev_tick: %d reg %p new_region %p\n", prev_tick, (void *)reg, (void *)new_region);
sraRgnOr(reg, new_region);
}
}
void clear_xdamage_mark_region(sraRegionPtr markregion, int flush) {
#if LIBVNCSERVER_HAVE_LIBXDAMAGE
XEvent ev;
sraRegionPtr tmpregion;
int count = 0;
RAWFB_RET_VOID
if (! xdamage_present || ! use_xdamage) {
return;
}
if (! xdamage) {
return;
}
if (! xdamage_base_event_type) {
return;
}
if (unixpw_in_progress) return;
X_LOCK;
if (flush) {
XFlush_wr(dpy);
}
while (XCheckTypedEvent(dpy, xdamage_base_event_type+XDamageNotify, &ev)) {
count++;
}
/* clear the whole damage region */
XDamageSubtract(dpy, xdamage, None, None);
X_UNLOCK;
if (debug_tiles || debug_xdamage) {
fprintf(stderr, "clear_xdamage_mark_region: %d\n", count);
}
if (! markregion) {
/* NULL means mark the whole display */
tmpregion = sraRgnCreateRect(0, 0, dpy_x, dpy_y);
add_region_xdamage(tmpregion);
sraRgnDestroy(tmpregion);
} else {
add_region_xdamage(markregion);
}
#else
if (0) flush++; /* compiler warnings */
if (0) markregion = NULL;
#endif
}
int collect_macosx_damage(int x_in, int y_in, int w_in, int h_in, int call) {
sraRegionPtr tmpregion;
sraRegionPtr reg;
static int rect_count = 0;
int nreg, ccount = 0, dcount = 0, ecount = 0;
static time_t last_rpt = 0;
time_t now;
double tm, dt;
int x, y, w, h, x2, y2;
if (call && debug_xdamage > 1) fprintf(stderr, "collect_macosx_damage: %d %d %d %d - %d / %d\n", x_in, y_in, w_in, h_in, call, use_xdamage);
if (! use_xdamage) {
return 0;
}
if (! xdamage_regions) {
return 0;
}
dtime0(&tm);
nreg = (xdamage_memory * NSCAN) + 1;
if (call == 0) {
xdamage_ticker = (xdamage_ticker+1) % nreg;
xdamage_direct_count = 0;
reg = xdamage_regions[xdamage_ticker];
if (reg != NULL) {
sraRgnMakeEmpty(reg);
}
} else {
reg = xdamage_regions[xdamage_ticker];
}
if (reg == NULL) {
return 0;
}
if (x_in < 0) {
return 0;
}
x = x_in;
y = y_in;
w = w_in;
h = h_in;
/* translate if needed */
if (clipshift) {
/* set coords relative to fb origin */
if (0 && rootshift) {
/*
* Note: not needed because damage is
* relative to subwin, not rootwin.
*/
x = x - off_x;
y = y - off_y;
}
if (clipshift) {
x = x - coff_x;
y = y - coff_y;
}
x2 = x + w; /* upper point */
x = nfix(x, dpy_x); /* place both in fb area */
x2 = nfix(x2, dpy_x+1);
w = x2 - x; /* recompute w */
y2 = y + h;
y = nfix(y, dpy_y);
y2 = nfix(y2, dpy_y+1);
h = y2 - y;
if (w <= 0 || h <= 0) {
return 0;
}
}
if (debug_xdamage > 2) {
fprintf(stderr, "xdamage: -> event %dx%d+%d+%d area:"
" %d dups: %d %s reg: %p\n", w, h, x, y, w*h, dcount,
(w*h > xdamage_max_area) ? "TOO_BIG" : "", (void *)reg);
}
record_desired_xdamage_rect(x, y, w, h);
tmpregion = sraRgnCreateRect(x, y, x + w, y + h);
sraRgnOr(reg, tmpregion);
sraRgnDestroy(tmpregion);
rect_count++;
ccount++;
if (0 && xdamage_direct_count) {
fb_push();
}
dt = dtime(&tm);
if ((debug_tiles > 1 && ecount) || (debug_tiles && ecount > 200)
|| debug_xdamage > 1) {
fprintf(stderr, "collect_macosx_damage(%d): %.4f t: %.4f ev/dup/accept"
"/direct %d/%d/%d/%d\n", call, dt, tm - x11vnc_start, ecount,
dcount, ccount, xdamage_direct_count);
}
now = time(NULL);
if (! last_rpt) {
last_rpt = now;
}
if (now > last_rpt + 15) {
double rat = -1.0;
if (XD_tot) {
rat = ((double) XD_skip)/XD_tot;
}
if (debug_tiles || debug_xdamage) {
fprintf(stderr, "xdamage: == scanline skip/tot: "
"%04d/%04d =%.3f rects: %d desired: %d\n",
XD_skip, XD_tot, rat, rect_count, XD_des);
}
XD_skip = 0;
XD_tot = 0;
XD_des = 0;
rect_count = 0;
last_rpt = now;
}
return 0;
}
int collect_xdamage(int scancnt, int call) {
#if LIBVNCSERVER_HAVE_LIBXDAMAGE
XDamageNotifyEvent *dev;
XEvent ev;
sraRegionPtr tmpregion;
sraRegionPtr reg;
static int rect_count = 0;
int nreg, ccount = 0, dcount = 0, ecount = 0;
static time_t last_rpt = 0;
time_t now;
int x, y, w, h, x2, y2;
int i, dup, next = 0, dup_max = 0;
#define DUPSZ 32
int dup_x[DUPSZ], dup_y[DUPSZ], dup_w[DUPSZ], dup_h[DUPSZ];
double tm, dt;
RAWFB_RET(0)
if (scancnt) {} /* unused vars warning: */
if (! xdamage_present || ! use_xdamage) {
return 0;
}
if (! xdamage) {
return 0;
}
if (! xdamage_base_event_type) {
return 0;
}
if (! xdamage_regions) {
return 0;
}
dtime0(&tm);
nreg = (xdamage_memory * NSCAN) + 1;
if (call == 0) {
xdamage_ticker = (xdamage_ticker+1) % nreg;
xdamage_direct_count = 0;
reg = xdamage_regions[xdamage_ticker];
if (reg != NULL) {
sraRgnMakeEmpty(reg);
}
} else {
reg = xdamage_regions[xdamage_ticker];
}
if (reg == NULL) {
return 0;
}
X_LOCK;
if (0) XFlush_wr(dpy);
if (0) XEventsQueued(dpy, QueuedAfterFlush);
while (XCheckTypedEvent(dpy, xdamage_base_event_type+XDamageNotify, &ev)) {
/*
* TODO max cut off time in this loop?
* Could check QLength and if huge just mark the whole
* screen.
*/
ecount++;
if (ev.type != xdamage_base_event_type + XDamageNotify) {
break;
}
dev = (XDamageNotifyEvent *) &ev;
if (dev->damage != xdamage) {
continue; /* not ours! */
}
x = dev->area.x;
y = dev->area.y;
w = dev->area.width;
h = dev->area.height;
/*
* we try to manually remove some duplicates because
* certain activities can lead to many 10's of dups
* in a row. The region work can be costly and reg is
* later used in xdamage_hint_skip loops, so it is good
* to skip them if possible.
*/
dup = 0;
for (i=0; i < dup_max; i++) {
if (dup_x[i] == x && dup_y[i] == y && dup_w[i] == w &&
dup_h[i] == h) {
dup = 1;
break;
}
}
if (dup) {
dcount++;
continue;
}
if (dup_max < DUPSZ) {
next = dup_max;
dup_max++;
} else {
next = (next+1) % DUPSZ;
}
dup_x[next] = x;
dup_y[next] = y;
dup_w[next] = w;
dup_h[next] = h;
/* translate if needed */
if (clipshift) {
/* set coords relative to fb origin */
if (0 && rootshift) {
/*
* Note: not needed because damage is
* relative to subwin, not rootwin.
*/
x = x - off_x;
y = y - off_y;
}
if (clipshift) {
x = x - coff_x;
y = y - coff_y;
}
x2 = x + w; /* upper point */
x = nfix(x, dpy_x); /* place both in fb area */
x2 = nfix(x2, dpy_x+1);
w = x2 - x; /* recompute w */
y2 = y + h;
y = nfix(y, dpy_y);
y2 = nfix(y2, dpy_y+1);
h = y2 - y;
if (w <= 0 || h <= 0) {
continue;
}
}
if (debug_xdamage > 2) {
fprintf(stderr, "xdamage: -> event %dx%d+%d+%d area:"
" %d dups: %d %s\n", w, h, x, y, w*h, dcount,
(w*h > xdamage_max_area) ? "TOO_BIG" : "");
}
record_desired_xdamage_rect(x, y, w, h);
tmpregion = sraRgnCreateRect(x, y, x + w, y + h);
sraRgnOr(reg, tmpregion);
sraRgnDestroy(tmpregion);
rect_count++;
ccount++;
}
/* clear the whole damage region for next time. XXX check */
if (call == 1) {
XDamageSubtract(dpy, xdamage, None, None);
}
X_UNLOCK;
if (0 && xdamage_direct_count) {
fb_push();
}
dt = dtime(&tm);
if ((debug_tiles > 1 && ecount) || (debug_tiles && ecount > 200)
|| debug_xdamage > 1) {
fprintf(stderr, "collect_xdamage(%d): %.4f t: %.4f ev/dup/accept"
"/direct %d/%d/%d/%d\n", call, dt, tm - x11vnc_start, ecount,
dcount, ccount, xdamage_direct_count);
}
now = time(NULL);
if (! last_rpt) {
last_rpt = now;
}
if (now > last_rpt + 15) {
double rat = -1.0;
if (XD_tot) {
rat = ((double) XD_skip)/XD_tot;
}
if (debug_tiles || debug_xdamage) {
fprintf(stderr, "xdamage: == scanline skip/tot: "
"%04d/%04d =%.3f rects: %d desired: %d\n",
XD_skip, XD_tot, rat, rect_count, XD_des);
}
XD_skip = 0;
XD_tot = 0;
XD_des = 0;
rect_count = 0;
last_rpt = now;
}
#else
if (0) scancnt++; /* compiler warnings */
if (0) call++;
if (0) record_desired_xdamage_rect(0, 0, 0, 0);
#endif
return 0;
}
int xdamage_hint_skip(int y) {
static sraRegionPtr scanline = NULL;
sraRegionPtr reg, tmpl;
int ret, i, n, nreg;
static int ncache_no_skip = 0;
static double last_ncache_no_skip = 0.0;
static double last_ncache_no_skip_long = 0.0, ncache_fac = 0.25;
if (! xdamage_present || ! use_xdamage) {
return 0; /* cannot skip */
}
if (! xdamage_regions) {
return 0; /* cannot skip */
}
if (! scanline) {
/* keep it around to avoid malloc etc, recreate */
scanline = sraRgnCreate();
}
nreg = (xdamage_memory * NSCAN) + 1;
#ifndef NO_NCACHE
if (ncache > 0) {
if (ncache_no_skip == 0) {
double now = dnow();
if (now > last_ncache_no_skip + 8.0) {
ncache_no_skip = 1;
} else if (now < last_bs_restore + 0.5) {
ncache_no_skip = 1;
} else if (now < last_su_restore + 0.5) {
ncache_no_skip = 1;
} else if (now < last_copyrect + 0.5) {
ncache_no_skip = 1;
}
if (ncache_no_skip) {
last_ncache_no_skip = dnow();
if (now > last_ncache_no_skip_long + 60.0) {
ncache_fac = 2.0;
last_ncache_no_skip_long = now;
} else {
ncache_fac = 0.25;
}
return 0;
}
} else {
if (ncache_no_skip++ >= ncache_fac*nreg + 4) {
ncache_no_skip = 0;
} else {
return 0;
}
}
}
#endif
tmpl = sraRgnCreateRect(0, y, dpy_x, y+1);
ret = 1;
for (i=0; i<nreg; i++) {
/* go back thru the history starting at most recent */
n = (xdamage_ticker + nreg - i) % nreg;
reg = xdamage_regions[n];
if (reg == NULL) {
continue;
}
if (sraRgnEmpty(reg)) {
/* checking for emptiness is very fast */
continue;
}
sraRgnMakeEmpty(scanline);
sraRgnOr(scanline, tmpl);
if (sraRgnAnd(scanline, reg)) {
ret = 0;
break;
}
}
sraRgnDestroy(tmpl);
if (0) fprintf(stderr, "xdamage_hint_skip: %d -> %d\n", y, ret);
return ret;
}
void initialize_xdamage(void) {
sraRegionPtr *ptr;
int i, nreg;
if (! xdamage_present) {
use_xdamage = 0;
}
if (xdamage_regions) {
ptr = xdamage_regions;
while (*ptr != NULL) {
sraRgnDestroy(*ptr);
ptr++;
}
free(xdamage_regions);
xdamage_regions = NULL;
}
if (use_xdamage) {
nreg = (xdamage_memory * NSCAN) + 2;
xdamage_regions = (sraRegionPtr *)
malloc(nreg * sizeof(sraRegionPtr));
for (i = 0; i < nreg; i++) {
ptr = xdamage_regions+i;
if (i == nreg - 1) {
*ptr = NULL;
} else {
*ptr = sraRgnCreate();
sraRgnMakeEmpty(*ptr);
}
}
/* set so will be 0 in first collect_xdamage call */
xdamage_ticker = -1;
}
}
void create_xdamage_if_needed(void) {
RAWFB_RET_VOID
#if LIBVNCSERVER_HAVE_LIBXDAMAGE
if (! xdamage) {
X_LOCK;
xdamage = XDamageCreate(dpy, window, XDamageReportRawRectangles);
XDamageSubtract(dpy, xdamage, None, None);
X_UNLOCK;
rfbLog("created xdamage object: 0x%lx\n", xdamage);
}
#endif
}
void destroy_xdamage_if_needed(void) {
RAWFB_RET_VOID
#if LIBVNCSERVER_HAVE_LIBXDAMAGE
if (xdamage) {
XEvent ev;
X_LOCK;
XDamageDestroy(dpy, xdamage);
XFlush_wr(dpy);
if (xdamage_base_event_type) {
while (XCheckTypedEvent(dpy,
xdamage_base_event_type+XDamageNotify, &ev)) {
;
}
}
X_UNLOCK;
rfbLog("destroyed xdamage object: 0x%lx\n", xdamage);
xdamage = 0;
}
#endif
}
void check_xdamage_state(void) {
if (! xdamage_present) {
return;
}
/*
* Create or destroy the Damage object as needed, we don't want
* one if no clients are connected.
*/
if (client_count && use_xdamage) {
create_xdamage_if_needed();
if (xdamage_scheduled_mark > 0.0 && dnow() >
xdamage_scheduled_mark) {
if (xdamage_scheduled_mark_region) {
mark_region_for_xdamage(
xdamage_scheduled_mark_region);
sraRgnDestroy(xdamage_scheduled_mark_region);
xdamage_scheduled_mark_region = NULL;
} else {
mark_for_xdamage(0, 0, dpy_x, dpy_y);
}
xdamage_scheduled_mark = 0.0;
}
} else {
destroy_xdamage_if_needed();
}
}
|