-
Notifications
You must be signed in to change notification settings - Fork 9
/
turbo-1.1.c
1783 lines (1510 loc) · 66 KB
/
turbo-1.1.c
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
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* tight.c
*
* Routines to implement Tight Encoding
*/
/*
* Copyright (C) 2010-2012, 2014 D. R. Commander. All Rights Reserved.
* Copyright (C) 2005-2008 Sun Microsystems, Inc. All Rights Reserved.
* Copyright (C) 2004 Landmark Graphics Corporation. All Rights Reserved.
* Copyright (C) 2000, 2001 Const Kaplinsky. All Rights Reserved.
* Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <errno.h>
#include <unistd.h>
#include "rfb.h"
#include "turbojpeg.h"
#ifndef min
#define min(a,b) ((a)<(b)?(a):(b))
#endif
static int enableLastRectEncoding = 1;
extern int decompress, ublen;
/* Note: The following constant should not be changed. */
#define TIGHT_MIN_TO_COMPRESS 12
/* The parameters below may be adjusted. */
#define MIN_SPLIT_RECT_SIZE 4096
#define MIN_SOLID_SUBRECT_SIZE 2048
#define MAX_SPLIT_TILE_SIZE 16
/* This variable is set on every rfbSendRectEncodingTight() call. */
static Bool usePixelFormat24;
/* Compression level stuff. The following array contains various
encoder parameters for each of 10 compression levels (0..9).
Last three parameters correspond to JPEG quality levels (0..9). */
typedef struct TIGHT_CONF_s {
int maxRectSize, maxRectWidth;
int monoMinRectSize;
int idxZlibLevel, monoZlibLevel, rawZlibLevel;
int idxMaxColorsDivisor;
int palMaxColorsWithJPEG;
} TIGHT_CONF;
static TIGHT_CONF tightConf[4] = {
{ 65536, 2048, 6, 0, 0, 0, 4, 24 }, // 0 (used only without JPEG)
{ 65536, 2048, 32, 1, 1, 1, 96, 24 }, // 1
{ 65536, 2048, 32, 3, 3, 2, 96, 96 }, // 2 (used only with JPEG)
{ 65536, 2048, 32, 7, 7, 5, 96, 256 } // 9
};
static int compressLevel = 1;
static int qualityLevel = 95;
static int subsampLevel = 0;
static const int subsampLevel2tjsubsamp[TVNC_SAMPOPT] = {
TJ_444, TJ_420, TJ_422, TJ_GRAYSCALE
};
/* Stuff dealing with palettes. */
typedef struct COLOR_LIST_s {
struct COLOR_LIST_s *next;
int idx;
CARD32 rgb;
} COLOR_LIST;
typedef struct PALETTE_ENTRY_s {
COLOR_LIST *listNode;
int numPixels;
} PALETTE_ENTRY;
typedef struct PALETTE_s {
PALETTE_ENTRY entry[256];
COLOR_LIST *hash[256];
COLOR_LIST list[256];
} PALETTE;
/* Globals for multi-threading */
#define TVNC_MAXTHREADS 8
static Bool threadInit = FALSE;
static int _nt;
static pthread_t thnd[TVNC_MAXTHREADS] = {0, 0, 0, 0, 0, 0, 0, 0};
typedef struct _threadparam {
rfbClientPtr cl;
int x, y, w, h, id, _ublen, *ublen;
char *tightBeforeBuf;
int tightBeforeBufSize;
char *tightAfterBuf;
int tightAfterBufSize;
char *updateBuf;
int updateBufSize;
int paletteNumColors, paletteMaxColors;
CARD32 monoBackground, monoForeground;
PALETTE palette;
tjhandle j;
int bytessent, rectsent;
int streamId, baseStreamId, nStreams;
pthread_mutex_t ready, done;
Bool status, deadyet;
unsigned long solidrect, solidpixels, monorect, monopixels, ndxrect,
ndxpixels, jpegrect, jpegpixels, fcrect, fcpixels;
} threadparam;
static threadparam tparam[TVNC_MAXTHREADS];
/* Prototypes for static functions. */
static void FindBestSolidArea (rfbClientPtr cl, int x, int y, int w, int h,
CARD32 colorValue, int *w_ptr, int *h_ptr);
static void ExtendSolidArea (rfbClientPtr cl, int x, int y, int w, int h,
CARD32 colorValue,
int *x_ptr, int *y_ptr, int *w_ptr, int *h_ptr);
static Bool CheckSolidTile (rfbClientPtr cl, int x, int y, int w, int h,
CARD32 *colorPtr, Bool needSameColor);
static Bool CheckSolidTile8 (rfbClientPtr cl, int x, int y, int w, int h,
CARD32 *colorPtr, Bool needSameColor);
static Bool CheckSolidTile16 (rfbClientPtr cl, int x, int y, int w, int h,
CARD32 *colorPtr, Bool needSameColor);
static Bool CheckSolidTile32 (rfbClientPtr cl, int x, int y, int w, int h,
CARD32 *colorPtr, Bool needSameColor);
static Bool SendRectSimple (threadparam *t, int x, int y, int w, int h);
static Bool SendSubrect (threadparam *t, int x, int y, int w, int h);
static Bool SendTightHeader (threadparam *t, int x, int y, int w, int h);
static Bool SendSolidRect (threadparam *t);
static Bool SendMonoRect (threadparam *t, int w, int h);
static Bool SendIndexedRect (threadparam *t, int w, int h);
static Bool SendFullColorRect (threadparam *t, int w, int h);
static Bool CompressData (threadparam *t, int streamId, int dataLen,
int zlibLevel, int zlibStrategy);
static Bool SendCompressedData (threadparam *t, char *buf, int compressedLen);
static void FillPalette8 (threadparam *t, int count);
static void FillPalette16 (threadparam *t, int count);
static void FillPalette32 (threadparam *t, int count);
static void FastFillPalette16 (threadparam *t, CARD16 *data, int w, int pitch,
int h);
static void FastFillPalette32 (threadparam *t, CARD32 *data, int w, int pitch,
int h);
static void PaletteReset (threadparam *t);
static int PaletteInsert (threadparam *t, CARD32 rgb, int numPixels, int bpp);
static void Pack24 (char *buf, rfbPixelFormat *fmt, int count);
static void EncodeIndexedRect16(threadparam *t, CARD8 *buf, int count);
static void EncodeIndexedRect32(threadparam *t, CARD8 *buf, int count);
static void EncodeMonoRect8(threadparam *t, CARD8 *buf, int w, int h);
static void EncodeMonoRect16(threadparam *t, CARD8 *buf, int w, int h);
static void EncodeMonoRect32(threadparam *t, CARD8 *buf, int w, int h);
static Bool SendJpegRect(threadparam *t, int x, int y, int w, int h,
int quality);
static Bool SendRectEncodingTight(threadparam *t, int x, int y, int w, int h);
static void *TightThreadFunc(void *param);
static Bool CheckUpdateBuf(threadparam *t, int bytes);
static int nthreads(void);
unsigned long solidrect = 0, solidpixels = 0, monorect = 0, monopixels = 0,
ndxrect = 0, ndxpixels = 0, jpegrect = 0, jpegpixels = 0, fcrect = 0,
fcpixels = 0, gradrect = 0, gradpixels = 0;
/*
* Tight encoding implementation.
*/
int
rfbNumCodedRectsTight(rfbClientPtr cl, int x, int y, int w, int h)
{
int maxRectSize, maxRectWidth;
int subrectMaxWidth, subrectMaxHeight;
/* No matter how many rectangles we will send if LastRect markers
are used to terminate rectangle stream. */
if (enableLastRectEncoding && w * h >= MIN_SPLIT_RECT_SIZE)
return 0;
maxRectSize = tightConf[compressLevel].maxRectSize;
maxRectWidth = tightConf[compressLevel].maxRectWidth;
if (w > maxRectWidth || w * h > maxRectSize) {
subrectMaxWidth = (w > maxRectWidth) ? maxRectWidth : w;
subrectMaxHeight = maxRectSize / subrectMaxWidth;
return (((w - 1) / maxRectWidth + 1) *
((h - 1) / subrectMaxHeight + 1));
} else {
return 1;
}
}
static int
nthreads(void)
{
char *mtenv = getenv("TVNC_MT");
char *ntenv = getenv("TVNC_NTHREADS");
int np = sysconf(_SC_NPROCESSORS_CONF), nt = 0;
if (!mtenv || strlen(mtenv) < 1 || strcmp(mtenv, "1"))
return 1;
if (np == -1) np = 1;
np = min(np, TVNC_MAXTHREADS);
if (ntenv && strlen(ntenv) > 0) nt = atoi(ntenv);
if (nt >= 1 && nt <= np) return nt;
else return np;
}
static void
InitThreads(void)
{
int err = 0, i;
if (threadInit) return;
_nt = nthreads();
memset(tparam, 0, sizeof(threadparam) * TVNC_MAXTHREADS);
tparam[0].ublen = &ublen;
tparam[0].updateBuf = updateBuf;
for (i = 1; i < TVNC_MAXTHREADS; i++) {
tparam[i].ublen = &tparam[i]._ublen;
tparam[i].id = i;
}
rfbLog("Using %d thread%s for Tight encoding\n", _nt,
_nt == 1 ? "" : "s");
if (_nt > 1) {
for (i = 1; i < _nt; i++) {
if (!tparam[i].updateBuf) {
tparam[i].updateBufSize = UPDATE_BUF_SIZE;
tparam[i].updateBuf = (char *)malloc(tparam[i].updateBufSize);
}
pthread_mutex_init(&tparam[i].ready, NULL);
pthread_mutex_lock(&tparam[i].ready);
pthread_mutex_init(&tparam[i].done, NULL);
pthread_mutex_lock(&tparam[i].done);
if ((err = pthread_create(&thnd[i], NULL, TightThreadFunc,
&tparam[i])) != 0) {
rfbLog ("Could not start thread %d: %s\n", i + 1,
strerror(err == -1 ? errno : err));
return;
}
}
}
threadInit = TRUE;
}
void
ShutdownTightThreads(void)
{
int i;
if (!threadInit) return;
if (_nt > 1) {
for (i = 1; i < _nt; i++) {
if (thnd[i]) {
tparam[i].deadyet = TRUE;
pthread_mutex_unlock(&tparam[i].ready);
pthread_join(thnd[i], NULL);
thnd[i] = 0;
pthread_mutex_destroy(&tparam[i].ready);
pthread_mutex_destroy(&tparam[i].done);
}
}
}
for (i = 0; i < _nt; i++) {
if (tparam[i].tightAfterBuf) free(tparam[i].tightAfterBuf);
if (tparam[i].tightBeforeBuf) free(tparam[i].tightBeforeBuf);
if (i != 0 && tparam[i].updateBuf) free(tparam[i].updateBuf);
if (tparam[i].j) tjDestroy(tparam[i].j);
memset(&tparam[i], 0, sizeof(threadparam));
}
threadInit = FALSE;
}
static void *
TightThreadFunc(void *param)
{
threadparam *t = (threadparam *)param;
while (!t->deadyet) {
pthread_mutex_lock(&t->ready);
if (t->deadyet) break;
t->status = SendRectEncodingTight(t, t->x, t->y, t->w, t->h);
pthread_mutex_unlock(&t->done);
}
return NULL;
}
static Bool
CheckUpdateBuf(threadparam *t, int bytes)
{
rfbClientPtr cl = t->cl;
if (t->id == 0) {
if (ublen + bytes > UPDATE_BUF_SIZE) {
if (!rfbSendUpdateBuf(cl))
return FALSE;
}
}
else {
if ((*t->ublen) + bytes > t->updateBufSize) {
t->updateBufSize += UPDATE_BUF_SIZE;
t->updateBuf = (char *)realloc(t->updateBuf, t->updateBufSize);
}
}
return TRUE;
}
Bool
rfbSendRectEncodingTight(rfbClientPtr cl, int x, int y, int w, int h)
{
Bool status = TRUE;
int i, nt;
if (!threadInit) {
InitThreads();
if (!threadInit) return FALSE;
}
/* CL 9 (which maps internally to CL 3) is included mainly for backward
compatibility with TightVNC Compression Levels 5-9. It should be used
only in extremely low-bandwidth cases in which it can be shown to have a
benefit. For low-color workloads, it provides typically only 10-20%
better compression than CL 2 with JPEG and CL 1 without JPEG, and it
uses, on average, twice as much CPU time. */
if (compressLevel > 3) compressLevel = 3;
/* We only allow compression levels that have a demonstrable performance
benefit. CL 0 with JPEG reduces CPU usage for workloads that have low
numbers of unique colors, but the same thing can be accomplished by
using CL 0 without JPEG (AKA "Lossless Tight.") For those same
low-color workloads, CL 2 can provide typically 20-40% better
compression than CL 1 (with a commensurate increase in CPU usage.) For
high-color workloads, CL 1 should always be used, as higher compression
levels increase CPU usage for these workloads without providing any
significant reduction in bandwidth. */
if (qualityLevel != -1) {
if (compressLevel < 1) compressLevel = 1;
}
/* With JPEG disabled, CL 2 offers no significant bandwidth savings over
CL 1, so we don't include it. */
else if (compressLevel == 2) compressLevel = 1;
if (cl->format.depth == 24 && cl->format.redMax == 0xFF &&
cl->format.greenMax == 0xFF && cl->format.blueMax == 0xFF) {
usePixelFormat24 = TRUE;
} else {
usePixelFormat24 = FALSE;
}
nt = min(_nt, w * h / tightConf[compressLevel].maxRectSize);
if (nt < 1) nt = 1;
for (i = 0; i < nt; i++) {
tparam[i].status = TRUE;
tparam[i].cl = cl;
tparam[i].x = x;
tparam[i].y = h / nt * i + y;
tparam[i].w = w;
tparam[i].h = (i == nt - 1) ? (h - (h / nt * i)) : h / nt;
tparam[i].bytessent = tparam[i].rectsent = 0;
if (i < 4) {
int n = min(nt, 4);
tparam[i].baseStreamId = 4 / n * i;
if (i == n - 1) tparam[i].nStreams = 4 - tparam[i].baseStreamId;
else tparam[i].nStreams = 4 / n;
tparam[i].streamId = tparam[i].baseStreamId;
}
tparam[i].solidrect = tparam[i].solidpixels = 0;
tparam[i].monorect = tparam[i].monopixels = 0;
tparam[i].ndxrect = tparam[i].ndxpixels = 0;
tparam[i].jpegrect = tparam[i].jpegpixels = 0;
tparam[i].fcrect = tparam[i].fcpixels = 0;
}
if (nt > 1) {
for (i = 1; i < nt; i++) pthread_mutex_unlock(&tparam[i].ready);
}
status &= SendRectEncodingTight(&tparam[0], tparam[0].x, tparam[0].y,
tparam[0].w, tparam[0].h);
if (!status) return FALSE;
cl->rfbBytesSent[rfbEncodingTight] += tparam[0].bytessent;
cl->rfbRectanglesSent[rfbEncodingTight] += tparam[0].rectsent;
if (nt > 1) {
for (i = 1; i < nt; i++) {
pthread_mutex_lock (&tparam[i].done);
status &= tparam[i].status;
}
if (status == FALSE) return FALSE;
if (ublen > 0) {
if (!rfbSendUpdateBuf(cl)) {
return FALSE;
}
}
for (i = 1; i < nt; i++) {
if ((*tparam[i].ublen) > 0 && decompress) {
if ((*tparam[i].ublen) + sblen > SEND_BUF_SIZE) {
rfbLog("ERROR: Send buffer overrun.\n");
return FALSE;
}
memcpy(&sendBuf[sblen], tparam[i].updateBuf, *tparam[i].ublen);
sblen += (*tparam[i].ublen);
}
(*tparam[i].ublen) = 0;
cl->rfbBytesSent[rfbEncodingTight] += tparam[i].bytessent;
cl->rfbRectanglesSent[rfbEncodingTight] += tparam[i].rectsent;
}
}
for (i = 0; i < nt; i++) {
solidrect += tparam[i].solidrect;
solidpixels += tparam[i].solidpixels;
monorect += tparam[i].monorect;
monopixels += tparam[i].monopixels;
ndxrect += tparam[i].ndxrect;
ndxpixels += tparam[i].ndxpixels;
jpegrect += tparam[i].jpegrect;
jpegpixels += tparam[i].jpegpixels;
fcrect += tparam[i].fcrect;
fcpixels += tparam[i].fcpixels;
}
return status;
}
static Bool
SendRectEncodingTight(threadparam *t, int x, int y, int w, int h)
{
int nMaxRows;
CARD32 colorValue = 0;
int dx, dy, dw, dh;
int x_best, y_best, w_best, h_best;
char *fbptr;
rfbClientPtr cl = t->cl;
if (!enableLastRectEncoding || w * h < MIN_SPLIT_RECT_SIZE)
return SendRectSimple(t, x, y, w, h);
/* Make sure we can write at least one pixel into tightBeforeBuf. */
if (t->tightBeforeBufSize < 4) {
t->tightBeforeBufSize = 4;
if (t->tightBeforeBuf == NULL)
t->tightBeforeBuf = (char *)malloc(t->tightBeforeBufSize);
else
t->tightBeforeBuf = (char *)realloc(t->tightBeforeBuf,
t->tightBeforeBufSize);
}
/* Calculate maximum number of rows in one non-solid rectangle. */
{
int maxRectSize, maxRectWidth, nMaxWidth;
maxRectSize = tightConf[compressLevel].maxRectSize;
maxRectWidth = tightConf[compressLevel].maxRectWidth;
nMaxWidth = (w > maxRectWidth) ? maxRectWidth : w;
nMaxRows = maxRectSize / nMaxWidth;
}
/* Try to find large solid-color areas and send them separately. */
for (dy = y; dy < y + h; dy += MAX_SPLIT_TILE_SIZE) {
/* If a rectangle becomes too large, send its upper part now. */
if (dy - y >= nMaxRows) {
if (!SendRectSimple(t, x, y, w, nMaxRows))
return 0;
y += nMaxRows;
h -= nMaxRows;
}
dh = (dy + MAX_SPLIT_TILE_SIZE <= y + h) ?
MAX_SPLIT_TILE_SIZE : (y + h - dy);
for (dx = x; dx < x + w; dx += MAX_SPLIT_TILE_SIZE) {
dw = (dx + MAX_SPLIT_TILE_SIZE <= x + w) ?
MAX_SPLIT_TILE_SIZE : (x + w - dx);
if (CheckSolidTile(cl, dx, dy, dw, dh, &colorValue, FALSE)) {
if (subsampLevel == TJ_GRAYSCALE && qualityLevel != -1) {
CARD32 r = (colorValue >> 16) & 0xFF;
CARD32 g = (colorValue >> 8) & 0xFF;
CARD32 b = (colorValue) & 0xFF;
double y = (0.257 * (double)r) + (0.504 * (double)g)
+ (0.098 * (double)b) + 16.;
colorValue = (int)y + (((int)y) << 8) + (((int)y) << 16);
}
/* Get dimensions of solid-color area. */
FindBestSolidArea(cl, dx, dy, w - (dx - x), h - (dy - y),
colorValue, &w_best, &h_best);
/* Make sure a solid rectangle is large enough
(or the whole rectangle is of the same color). */
if (w_best * h_best != w * h &&
w_best * h_best < MIN_SOLID_SUBRECT_SIZE)
continue;
/* Try to extend solid rectangle to maximum size. */
x_best = dx; y_best = dy;
ExtendSolidArea(cl, x, y, w, h, colorValue,
&x_best, &y_best, &w_best, &h_best);
/* Send rectangles at top and left to solid-color area. */
if (y_best != y &&
!SendRectSimple(t, x, y, w, y_best - y))
return FALSE;
if (x_best != x &&
!SendRectEncodingTight(t, x, y_best,
x_best - x, h_best))
return FALSE;
/* Send solid-color rectangle. */
if (!SendTightHeader(t, x_best, y_best, w_best, h_best))
return FALSE;
fbptr = (cl->fb +
(rfbScreen.paddedWidthInBytes * y_best) +
(x_best * (rfbScreen.bitsPerPixel / 8)));
(*cl->translateFn)(cl->translateLookupTable, &rfbServerFormat,
&cl->format, fbptr, t->tightBeforeBuf,
rfbScreen.paddedWidthInBytes, 1, 1);
t->solidrect++; t->solidpixels += w_best * h_best;
if (!SendSolidRect(t))
return FALSE;
/* Send remaining rectangles (at right and bottom). */
if (x_best + w_best != x + w &&
!SendRectEncodingTight(t, x_best + w_best, y_best,
w - (x_best - x) - w_best, h_best))
return FALSE;
if (y_best + h_best != y + h &&
!SendRectEncodingTight(t, x, y_best + h_best,
w, h - (y_best - y) - h_best))
return FALSE;
/* Return after all recursive calls are done. */
return TRUE;
}
}
}
/* No suitable solid-color rectangles found. */
return SendRectSimple(t, x, y, w, h);
}
static void
FindBestSolidArea(rfbClientPtr cl, int x, int y, int w, int h,
CARD32 colorValue, int *w_ptr, int *h_ptr)
{
int dx, dy, dw, dh;
int w_prev;
int w_best = 0, h_best = 0;
w_prev = w;
for (dy = y; dy < y + h; dy += MAX_SPLIT_TILE_SIZE) {
dh = (dy + MAX_SPLIT_TILE_SIZE <= y + h) ?
MAX_SPLIT_TILE_SIZE : (y + h - dy);
dw = (w_prev > MAX_SPLIT_TILE_SIZE) ?
MAX_SPLIT_TILE_SIZE : w_prev;
if (!CheckSolidTile(cl, x, dy, dw, dh, &colorValue, TRUE))
break;
for (dx = x + dw; dx < x + w_prev;) {
dw = (dx + MAX_SPLIT_TILE_SIZE <= x + w_prev) ?
MAX_SPLIT_TILE_SIZE : (x + w_prev - dx);
if (!CheckSolidTile(cl, dx, dy, dw, dh, &colorValue, TRUE))
break;
dx += dw;
}
w_prev = dx - x;
if (w_prev * (dy + dh - y) > w_best * h_best) {
w_best = w_prev;
h_best = dy + dh - y;
}
}
*w_ptr = w_best;
*h_ptr = h_best;
}
static void
ExtendSolidArea(rfbClientPtr cl, int x, int y, int w, int h, CARD32 colorValue,
int *x_ptr, int *y_ptr, int *w_ptr, int *h_ptr)
{
int cx, cy;
/* Try to extend the area upwards. */
for (cy = *y_ptr - 1;
cy >= y && CheckSolidTile(cl, *x_ptr, cy, *w_ptr, 1, &colorValue,
TRUE);
cy--);
*h_ptr += *y_ptr - (cy + 1);
*y_ptr = cy + 1;
/* ... downwards. */
for (cy = *y_ptr + *h_ptr;
cy < y + h &&
CheckSolidTile(cl, *x_ptr, cy, *w_ptr, 1, &colorValue, TRUE);
cy++);
*h_ptr += cy - (*y_ptr + *h_ptr);
/* ... to the left. */
for (cx = *x_ptr - 1;
cx >= x && CheckSolidTile(cl, cx, *y_ptr, 1, *h_ptr, &colorValue,
TRUE);
cx--);
*w_ptr += *x_ptr - (cx + 1);
*x_ptr = cx + 1;
/* ... to the right. */
for (cx = *x_ptr + *w_ptr;
cx < x + w &&
CheckSolidTile(cl, cx, *y_ptr, 1, *h_ptr, &colorValue, TRUE);
cx++);
*w_ptr += cx - (*x_ptr + *w_ptr);
}
/*
* Check if a rectangle is all of the same color. If needSameColor is
* set to non-zero, then also check that its color equals to the
* *colorPtr value. The result is 1 if the test is successfull, and in
* that case new color will be stored in *colorPtr.
*/
static Bool
CheckSolidTile(rfbClientPtr cl, int x, int y, int w, int h, CARD32 *colorPtr,
Bool needSameColor)
{
switch(rfbServerFormat.bitsPerPixel) {
case 32:
return CheckSolidTile32(cl, x, y, w, h, colorPtr, needSameColor);
case 16:
return CheckSolidTile16(cl, x, y, w, h, colorPtr, needSameColor);
default:
return CheckSolidTile8(cl, x, y, w, h, colorPtr, needSameColor);
}
}
#define DEFINE_CHECK_SOLID_FUNCTION(bpp) \
\
static Bool \
CheckSolidTile##bpp(cl, x, y, w, h, colorPtr, needSameColor) \
rfbClientPtr cl; \
int x, y, w, h; \
CARD32 *colorPtr; \
Bool needSameColor; \
{ \
CARD##bpp *fbptr; \
CARD##bpp colorValue; \
int dx, dy; \
\
fbptr = (CARD##bpp *) \
&cl->fb[y * rfbScreen.paddedWidthInBytes + x * (bpp/8)]; \
\
colorValue = *fbptr; \
if (needSameColor && (CARD32)colorValue != *colorPtr) \
return FALSE; \
\
for (dy = 0; dy < h; dy++) { \
for (dx = 0; dx < w; dx++) { \
if (colorValue != fbptr[dx]) \
return FALSE; \
} \
fbptr = (CARD##bpp *)((CARD8 *)fbptr + rfbScreen.paddedWidthInBytes); \
} \
\
*colorPtr = (CARD32)colorValue; \
return TRUE; \
}
DEFINE_CHECK_SOLID_FUNCTION(8)
DEFINE_CHECK_SOLID_FUNCTION(16)
DEFINE_CHECK_SOLID_FUNCTION(32)
static Bool
SendRectSimple(threadparam *t, int x, int y, int w, int h)
{
int maxBeforeSize, maxAfterSize;
int maxRectSize, maxRectWidth;
int subrectMaxWidth, subrectMaxHeight;
int dx, dy;
int rw, rh;
rfbClientPtr cl = t->cl;
maxRectSize = tightConf[compressLevel].maxRectSize;
maxRectWidth = tightConf[compressLevel].maxRectWidth;
maxBeforeSize = maxRectSize * (cl->format.bitsPerPixel / 8);
maxAfterSize = maxBeforeSize + (maxBeforeSize + 99) / 100 + 12;
if (t->tightBeforeBufSize < maxBeforeSize) {
t->tightBeforeBufSize = maxBeforeSize;
if (t->tightBeforeBuf == NULL)
t->tightBeforeBuf = (char *)malloc(t->tightBeforeBufSize);
else
t->tightBeforeBuf = (char *)realloc(t->tightBeforeBuf,
t->tightBeforeBufSize);
}
if (t->tightAfterBufSize < maxAfterSize) {
t->tightAfterBufSize = maxAfterSize;
if (t->tightAfterBuf == NULL)
t->tightAfterBuf = (char *)malloc(t->tightAfterBufSize);
else
t->tightAfterBuf = (char *)realloc(t->tightAfterBuf,
t->tightAfterBufSize);
}
if (w > maxRectWidth || w * h > maxRectSize) {
subrectMaxWidth = (w > maxRectWidth) ? maxRectWidth : w;
subrectMaxHeight = maxRectSize / subrectMaxWidth;
for (dy = 0; dy < h; dy += subrectMaxHeight) {
for (dx = 0; dx < w; dx += maxRectWidth) {
rw = (dx + maxRectWidth < w) ? maxRectWidth : w - dx;
rh = (dy + subrectMaxHeight < h) ? subrectMaxHeight : h - dy;
if (!SendSubrect(t, x + dx, y + dy, rw, rh))
return FALSE;
}
}
} else {
if (!SendSubrect(t, x, y, w, h))
return FALSE;
}
return TRUE;
}
static Bool
SendSubrect(threadparam *t, int x, int y, int w, int h)
{
char *fbptr;
Bool success = FALSE;
rfbClientPtr cl = t->cl;
/* Send pending data if there is more than 128 bytes. */
if (t->id == 0) {
if (ublen > 128) {
if (!rfbSendUpdateBuf(cl))
return FALSE;
}
}
if (!SendTightHeader(t, x, y, w, h))
return FALSE;
fbptr = (cl->fb + (rfbScreen.paddedWidthInBytes * y)
+ (x * (rfbScreen.bitsPerPixel / 8)));
if (subsampLevel == TJ_GRAYSCALE && qualityLevel != -1 &&
rfbScreen.bitsPerPixel > 8)
return SendJpegRect(t, x, y, w, h, qualityLevel);
t->paletteMaxColors = w * h / tightConf[compressLevel].idxMaxColorsDivisor;
if (qualityLevel != -1)
t->paletteMaxColors = tightConf[compressLevel].palMaxColorsWithJPEG;
if (t->paletteMaxColors < 2 &&
w * h >= tightConf[compressLevel].monoMinRectSize) {
t->paletteMaxColors = 2;
}
if (cl->format.bitsPerPixel == rfbServerFormat.bitsPerPixel &&
cl->format.redMax == rfbServerFormat.redMax &&
cl->format.greenMax == rfbServerFormat.greenMax &&
cl->format.blueMax == rfbServerFormat.blueMax &&
cl->format.bitsPerPixel >= 16) {
/* This is so we can avoid translating the pixels when compressing
with JPEG, since it is unnecessary */
switch (cl->format.bitsPerPixel) {
case 16:
FastFillPalette16(t, (CARD16 *)fbptr, w,
rfbScreen.paddedWidthInBytes/2, h);
break;
default:
FastFillPalette32(t, (CARD32 *)fbptr, w,
rfbScreen.paddedWidthInBytes/4, h);
}
if (t->paletteNumColors != 0 || qualityLevel == -1) {
(*cl->translateFn)(cl->translateLookupTable, &rfbServerFormat,
&cl->format, fbptr, t->tightBeforeBuf,
rfbScreen.paddedWidthInBytes, w, h);
}
}
else {
(*cl->translateFn)(cl->translateLookupTable, &rfbServerFormat,
&cl->format, fbptr, t->tightBeforeBuf,
rfbScreen.paddedWidthInBytes, w, h);
switch (cl->format.bitsPerPixel) {
case 8:
FillPalette8(t, w * h);
break;
case 16:
FillPalette16(t, w * h);
break;
default:
FillPalette32(t, w * h);
}
}
switch (t->paletteNumColors) {
case 0:
/* Truecolor image */
if (qualityLevel != -1) {
success = SendJpegRect(t, x, y, w, h, qualityLevel);
} else {
success = SendFullColorRect(t, w, h);
}
break;
case 1:
/* Solid rectangle */
t->solidrect++; t->solidpixels += w*h;
success = SendSolidRect(t);
break;
case 2:
/* Two-color rectangle */
success = SendMonoRect(t, w, h);
break;
default:
/* Up to 256 different colors */
success = SendIndexedRect(t, w, h);
}
return success;
}
static Bool
SendTightHeader(threadparam *t, int x, int y, int w, int h)
{
rfbFramebufferUpdateRectHeader rect;
if (!CheckUpdateBuf(t, sz_rfbFramebufferUpdateRectHeader))
return FALSE;
rect.r.x = Swap16IfLE(x);
rect.r.y = Swap16IfLE(y);
rect.r.w = Swap16IfLE(w);
rect.r.h = Swap16IfLE(h);
rect.encoding = Swap32IfLE(rfbEncodingTight);
memcpy(&t->updateBuf[*t->ublen], (char *)&rect,
sz_rfbFramebufferUpdateRectHeader);
(*t->ublen) += sz_rfbFramebufferUpdateRectHeader;
t->rectsent++;
t->bytessent += sz_rfbFramebufferUpdateRectHeader;
return TRUE;
}
/*
* Subencoding implementations.
*/
static Bool
SendSolidRect(threadparam *t)
{
int len;
rfbClientPtr cl = t->cl;
if (usePixelFormat24) {
Pack24(t->tightBeforeBuf, &cl->format, 1);
len = 3;
} else
len = cl->format.bitsPerPixel / 8;
if (!CheckUpdateBuf(t, 1 + len))
return FALSE;
t->updateBuf[(*t->ublen)++] = (char)(rfbTightFill << 4);
memcpy(&t->updateBuf[*t->ublen], t->tightBeforeBuf, len);
(*t->ublen) += len;
t->bytessent += len + 1;
return TRUE;
}
static Bool
SendMonoRect(threadparam *t, int w, int h)
{
int streamId = t->streamId;
int paletteLen, dataLen;
rfbClientPtr cl = t->cl;
t->monorect++; t->monopixels += w*h;
if (!CheckUpdateBuf(t, TIGHT_MIN_TO_COMPRESS + 6 +
2 * cl->format.bitsPerPixel / 8))
return FALSE;
if (t->nStreams > 0) {
t->streamId++;
if (t->streamId >= t->baseStreamId + t->nStreams)
t->streamId = t->baseStreamId;
}
/* Prepare tight encoding header. */
dataLen = (w + 7) / 8;
dataLen *= h;
if (tightConf[compressLevel].monoZlibLevel == 0 || t->id > 3)
t->updateBuf[(*t->ublen)++] =
(char)((rfbTightNoZlib | rfbTightExplicitFilter) << 4);
else
t->updateBuf[(*t->ublen)++] = (streamId | rfbTightExplicitFilter) << 4;
t->updateBuf[(*t->ublen)++] = rfbTightFilterPalette;
t->updateBuf[(*t->ublen)++] = 1;
/* Prepare palette, convert image. */
switch (cl->format.bitsPerPixel) {
case 32:
EncodeMonoRect32(t, (CARD8 *)t->tightBeforeBuf, w, h);
((CARD32 *)t->tightAfterBuf)[0] = t->monoBackground;
((CARD32 *)t->tightAfterBuf)[1] = t->monoForeground;
if (usePixelFormat24) {
Pack24(t->tightAfterBuf, &cl->format, 2);
paletteLen = 6;
} else
paletteLen = 8;
memcpy(&t->updateBuf[*t->ublen], t->tightAfterBuf, paletteLen);
(*t->ublen) += paletteLen;
t->bytessent += 3 + paletteLen;
break;
case 16:
EncodeMonoRect16(t, (CARD8 *)t->tightBeforeBuf, w, h);