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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
|
/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2011 Blender Foundation. */
#include <cstdlib>
#include "COM_DoubleEdgeMaskOperation.h"
namespace blender::compositor {
/* This part has been copied from the double edge mask. */
static void do_adjacentKeepBorders(
uint t, uint rw, const uint *limask, const uint *lomask, uint *lres, float *res, uint *rsize)
{
int x;
uint isz = 0; /* Inner edge size. */
uint osz = 0; /* Outer edge size. */
uint gsz = 0; /* Gradient fill area size. */
/* Test the four corners */
/* Upper left corner. */
x = t - rw + 1;
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if pixel underneath, or to the right, are empty in the inner mask,
* but filled in the outer mask. */
if ((!limask[x - rw] && lomask[x - rw]) || (!limask[x + 1] && lomask[x + 1])) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
/* Upper right corner. */
x = t;
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if pixel underneath, or to the left, are empty in the inner mask,
* but filled in the outer mask. */
if ((!limask[x - rw] && lomask[x - rw]) || (!limask[x - 1] && lomask[x - 1])) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
/* Lower left corner. */
x = 0;
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if pixel above, or to the right, are empty in the inner mask,
* but filled in the outer mask. */
if ((!limask[x + rw] && lomask[x + rw]) || (!limask[x + 1] && lomask[x + 1])) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
/* Lower right corner. */
x = rw - 1;
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if pixel above, or to the left, are empty in the inner mask,
* but filled in the outer mask. */
if ((!limask[x + rw] && lomask[x + rw]) || (!limask[x - 1] && lomask[x - 1])) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
/* Test the TOP row of pixels in buffer, except corners */
for (x = t - 1; x >= (t - rw) + 2; x--) {
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if pixel to the right, or to the left, are empty in the inner mask,
* but filled in the outer mask. */
if ((!limask[x - 1] && lomask[x - 1]) || (!limask[x + 1] && lomask[x + 1])) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
}
/* Test the BOTTOM row of pixels in buffer, except corners */
for (x = rw - 2; x; x--) {
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if pixel to the right, or to the left, are empty in the inner mask,
* but filled in the outer mask. */
if ((!limask[x - 1] && lomask[x - 1]) || (!limask[x + 1] && lomask[x + 1])) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
}
/* Test the LEFT edge of pixels in buffer, except corners */
for (x = t - (rw << 1) + 1; x >= rw; x -= rw) {
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if pixel underneath, or above, are empty in the inner mask,
* but filled in the outer mask. */
if ((!limask[x - rw] && lomask[x - rw]) || (!limask[x + rw] && lomask[x + rw])) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
}
/* Test the RIGHT edge of pixels in buffer, except corners */
for (x = t - rw; x > rw; x -= rw) {
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if pixel underneath, or above, are empty in the inner mask,
* but filled in the outer mask. */
if ((!limask[x - rw] && lomask[x - rw]) || (!limask[x + rw] && lomask[x + rw])) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
}
rsize[0] = isz; /* Fill in our return sizes for edges + fill. */
rsize[1] = osz;
rsize[2] = gsz;
}
static void do_adjacentBleedBorders(
uint t, uint rw, const uint *limask, const uint *lomask, uint *lres, float *res, uint *rsize)
{
int x;
uint isz = 0; /* Inner edge size. */
uint osz = 0; /* Outer edge size. */
uint gsz = 0; /* Gradient fill area size. */
/* Test the four corners */
/* Upper left corner. */
x = t - rw + 1;
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if pixel underneath, or to the right, are empty in the inner mask,
* but filled in the outer mask. */
if ((!limask[x - rw] && lomask[x - rw]) || (!limask[x + 1] && lomask[x + 1])) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
if (!lomask[x - rw] ||
!lomask[x + 1]) { /* Test if outer mask is empty underneath or to the right. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
else {
gsz++; /* Increment the gradient pixel count. */
lres[x] = 2; /* Flag pixel as gradient. */
}
}
/* Upper right corner. */
x = t;
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if pixel underneath, or to the left, are empty in the inner mask,
* but filled in the outer mask. */
if ((!limask[x - rw] && lomask[x - rw]) || (!limask[x - 1] && lomask[x - 1])) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
if (!lomask[x - rw] ||
!lomask[x - 1]) { /* Test if outer mask is empty underneath or to the left. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
else {
gsz++; /* Increment the gradient pixel count. */
lres[x] = 2; /* Flag pixel as gradient. */
}
}
/* Lower left corner. */
x = 0;
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if pixel above, or to the right, are empty in the inner mask,
* But filled in the outer mask. */
if ((!limask[x + rw] && lomask[x + rw]) || (!limask[x + 1] && lomask[x + 1])) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
if (!lomask[x + rw] ||
!lomask[x + 1]) { /* Test if outer mask is empty above or to the right. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
else {
gsz++; /* Increment the gradient pixel count. */
lres[x] = 2; /* Flag pixel as gradient. */
}
}
/* Lower right corner. */
x = rw - 1;
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if pixel above, or to the left, are empty in the inner mask,
* but filled in the outer mask. */
if ((!limask[x + rw] && lomask[x + rw]) || (!limask[x - 1] && lomask[x - 1])) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
if (!lomask[x + rw] ||
!lomask[x - 1]) { /* Test if outer mask is empty above or to the left. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
else {
gsz++; /* Increment the gradient pixel count. */
lres[x] = 2; /* Flag pixel as gradient. */
}
}
/* Test the TOP row of pixels in buffer, except corners */
for (x = t - 1; x >= (t - rw) + 2; x--) {
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if pixel to the left, or to the right, are empty in the inner mask,
* but filled in the outer mask. */
if ((!limask[x - 1] && lomask[x - 1]) || (!limask[x + 1] && lomask[x + 1])) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
if (!lomask[x - 1] ||
!lomask[x + 1]) { /* Test if outer mask is empty to the left or to the right. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
else {
gsz++; /* Increment the gradient pixel count. */
lres[x] = 2; /* Flag pixel as gradient. */
}
}
}
/* Test the BOTTOM row of pixels in buffer, except corners */
for (x = rw - 2; x; x--) {
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if pixel to the left, or to the right, are empty in the inner mask,
* but filled in the outer mask. */
if ((!limask[x - 1] && lomask[x - 1]) || (!limask[x + 1] && lomask[x + 1])) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
if (!lomask[x - 1] ||
!lomask[x + 1]) { /* Test if outer mask is empty to the left or to the right. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
else {
gsz++; /* Increment the gradient pixel count. */
lres[x] = 2; /* Flag pixel as gradient. */
}
}
}
/* Test the LEFT edge of pixels in buffer, except corners */
for (x = t - (rw << 1) + 1; x >= rw; x -= rw) {
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if pixel underneath, or above, are empty in the inner mask,
* but filled in the outer mask. */
if ((!limask[x - rw] && lomask[x - rw]) || (!limask[x + rw] && lomask[x + rw])) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
if (!lomask[x - rw] ||
!lomask[x + rw]) { /* Test if outer mask is empty underneath or above. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
else {
gsz++; /* Increment the gradient pixel count. */
lres[x] = 2; /* Flag pixel as gradient. */
}
}
}
/* Test the RIGHT edge of pixels in buffer, except corners */
for (x = t - rw; x > rw; x -= rw) {
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if pixel underneath, or above, are empty in the inner mask,
* But filled in the outer mask. */
if ((!limask[x - rw] && lomask[x - rw]) || (!limask[x + rw] && lomask[x + rw])) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
if (!lomask[x - rw] ||
!lomask[x + rw]) { /* Test if outer mask is empty underneath or above. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
else {
gsz++; /* Increment the gradient pixel count. */
lres[x] = 2; /* Flag pixel as gradient. */
}
}
}
rsize[0] = isz; /* Fill in our return sizes for edges + fill. */
rsize[1] = osz;
rsize[2] = gsz;
}
static void do_allKeepBorders(
uint t, uint rw, const uint *limask, const uint *lomask, uint *lres, float *res, uint *rsize)
{
int x;
uint isz = 0; /* Inner edge size. */
uint osz = 0; /* Outer edge size. */
uint gsz = 0; /* Gradient fill area size. */
/* Test the four corners. */
/* Upper left corner. */
x = t - rw + 1;
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if the inner mask is empty underneath or to the right. */
if (!limask[x - rw] || !limask[x + 1]) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
/* Upper right corner. */
x = t;
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if the inner mask is empty underneath or to the left. */
if (!limask[x - rw] || !limask[x - 1]) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
/* Lower left corner. */
x = 0;
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if inner mask is empty above or to the right. */
if (!limask[x + rw] || !limask[x + 1]) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
/* Lower right corner. */
x = rw - 1;
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if inner mask is empty above or to the left. */
if (!limask[x + rw] || !limask[x - 1]) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
/* Test the TOP row of pixels in buffer, except corners */
for (x = t - 1; x >= (t - rw) + 2; x--) {
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if inner mask is empty to the left or to the right. */
if (!limask[x - 1] || !limask[x + 1]) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
}
/* Test the BOTTOM row of pixels in buffer, except corners */
for (x = rw - 2; x; x--) {
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if inner mask is empty to the left or to the right. */
if (!limask[x - 1] || !limask[x + 1]) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
}
/* Test the LEFT edge of pixels in buffer, except corners */
for (x = t - (rw << 1) + 1; x >= rw; x -= rw) {
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if inner mask is empty underneath or above. */
if (!limask[x - rw] || !limask[x + rw]) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
}
/* Test the RIGHT edge of pixels in buffer, except corners */
for (x = t - rw; x > rw; x -= rw) {
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if inner mask is empty underneath or above. */
if (!limask[x - rw] || !limask[x + rw]) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
}
rsize[0] = isz; /* Fill in our return sizes for edges + fill. */
rsize[1] = osz;
rsize[2] = gsz;
}
static void do_allBleedBorders(
uint t, uint rw, const uint *limask, const uint *lomask, uint *lres, float *res, uint *rsize)
{
int x;
uint isz = 0; /* Inner edge size. */
uint osz = 0; /* Outer edge size. */
uint gsz = 0; /* Gradient fill area size. */
/* Test the four corners */
/* Upper left corner. */
x = t - rw + 1;
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if the inner mask is empty underneath or to the right. */
if (!limask[x - rw] || !limask[x + 1]) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
if (!lomask[x - rw] ||
!lomask[x + 1]) { /* Test if outer mask is empty underneath or to the right. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
else {
gsz++; /* Increment the gradient pixel count. */
lres[x] = 2; /* Flag pixel as gradient. */
}
}
/* Upper right corner. */
x = t;
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if the inner mask is empty underneath or to the left. */
if (!limask[x - rw] || !limask[x - 1]) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
if (!lomask[x - rw] ||
!lomask[x - 1]) { /* Test if outer mask is empty above or to the left. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
else {
gsz++; /* Increment the gradient pixel count. */
lres[x] = 2; /* Flag pixel as gradient. */
}
}
/* Lower left corner. */
x = 0;
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if inner mask is empty above or to the right. */
if (!limask[x + rw] || !limask[x + 1]) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
if (!lomask[x + rw] ||
!lomask[x + 1]) { /* Test if outer mask is empty underneath or to the right. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
else {
gsz++; /* Increment the gradient pixel count. */
lres[x] = 2; /* Flag pixel as gradient. */
}
}
/* Lower right corner. */
x = rw - 1;
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if inner mask is empty above or to the left. */
if (!limask[x + rw] || !limask[x - 1]) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
if (!lomask[x + rw] ||
!lomask[x - 1]) { /* Test if outer mask is empty underneath or to the left. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
else {
gsz++; /* Increment the gradient pixel count. */
lres[x] = 2; /* Flag pixel as gradient. */
}
}
/* Test the TOP row of pixels in buffer, except corners */
for (x = t - 1; x >= (t - rw) + 2; x--) {
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if inner mask is empty to the left or to the right. */
if (!limask[x - 1] || !limask[x + 1]) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
if (!lomask[x - 1] ||
!lomask[x + 1]) { /* Test if outer mask is empty to the left or to the right. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
else {
gsz++; /* Increment the gradient pixel count. */
lres[x] = 2; /* Flag pixel as gradient. */
}
}
}
/* Test the BOTTOM row of pixels in buffer, except corners */
for (x = rw - 2; x; x--) {
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if inner mask is empty to the left or to the right. */
if (!limask[x - 1] || !limask[x + 1]) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
if (!lomask[x - 1] ||
!lomask[x + 1]) { /* Test if outer mask is empty to the left or to the right. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
else {
gsz++; /* Increment the gradient pixel count. */
lres[x] = 2; /* Flag pixel as gradient. */
}
}
}
/* Test the LEFT edge of pixels in buffer, except corners */
for (x = t - (rw << 1) + 1; x >= rw; x -= rw) {
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if inner mask is empty underneath or above. */
if (!limask[x - rw] || !limask[x + rw]) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
if (!lomask[x - rw] ||
!lomask[x + rw]) { /* Test if outer mask is empty underneath or above. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
else {
gsz++; /* Increment the gradient pixel count. */
lres[x] = 2; /* Flag pixel as gradient. */
}
}
}
/* Test the RIGHT edge of pixels in buffer, except corners */
for (x = t - rw; x > rw; x -= rw) {
/* Test if inner mask is filled. */
if (limask[x]) {
/* Test if inner mask is empty underneath or above. */
if (!limask[x - rw] || !limask[x + rw]) {
isz++; /* Increment inner edge size. */
lres[x] = 4; /* Flag pixel as inner edge. */
}
else {
res[x] = 1.0f; /* Pixel is just part of inner mask, and it's not an edge. */
}
}
else if (lomask[x]) { /* Inner mask was empty, test if outer mask is filled. */
if (!lomask[x - rw] ||
!lomask[x + rw]) { /* Test if outer mask is empty underneath or above. */
osz++; /* Increment outer edge size. */
lres[x] = 3; /* Flag pixel as outer edge. */
}
else {
gsz++; /* Increment the gradient pixel count. */
lres[x] = 2; /* Flag pixel as gradient. */
}
}
}
rsize[0] = isz; /* Fill in our return sizes for edges + fill. */
rsize[1] = osz;
rsize[2] = gsz;
}
static void do_allEdgeDetection(uint t,
uint rw,
const uint *limask,
const uint *lomask,
uint *lres,
float *res,
uint *rsize,
uint in_isz,
uint in_osz,
uint in_gsz)
{
int x; /* Pixel loop counter. */
int a; /* Pixel loop counter. */
int dx; /* Delta x. */
int pix_prevRow; /* Pixel one row behind the one we are testing in a loop. */
int pix_nextRow; /* Pixel one row in front of the one we are testing in a loop. */
int pix_prevCol; /* Pixel one column behind the one we are testing in a loop. */
int pix_nextCol; /* Pixel one column in front of the one we are testing in a loop. */
/* Test all rows between the FIRST and LAST rows, excluding left and right edges */
for (x = (t - rw) + 1, dx = x - (rw - 2); dx > rw; x -= rw, dx -= rw) {
a = x - 2;
pix_prevRow = a + rw;
pix_nextRow = a - rw;
pix_prevCol = a + 1;
pix_nextCol = a - 1;
while (a > dx - 2) {
if (!limask[a]) { /* If the inner mask is empty. */
if (lomask[a]) { /* If the outer mask is full. */
/*
* Next we test all 4 directions around the current pixel: next/previous/up/down
* The test ensures that the outer mask is empty and that the inner mask
* is also empty. If both conditions are true for any one of the 4 adjacent pixels
* then the current pixel is counted as being a true outer edge pixel.
*/
if ((!lomask[pix_nextCol] && !limask[pix_nextCol]) ||
(!lomask[pix_prevCol] && !limask[pix_prevCol]) ||
(!lomask[pix_nextRow] && !limask[pix_nextRow]) ||
(!lomask[pix_prevRow] && !limask[pix_prevRow])) {
in_osz++; /* Increment the outer boundary pixel count. */
lres[a] = 3; /* Flag pixel as part of outer edge. */
}
else { /* It's not a boundary pixel, but it is a gradient pixel. */
in_gsz++; /* Increment the gradient pixel count. */
lres[a] = 2; /* Flag pixel as gradient. */
}
}
}
else {
if (!limask[pix_nextCol] || !limask[pix_prevCol] || !limask[pix_nextRow] ||
!limask[pix_prevRow]) {
in_isz++; /* Increment the inner boundary pixel count. */
lres[a] = 4; /* Flag pixel as part of inner edge. */
}
else {
res[a] = 1.0f; /* Pixel is part of inner mask, but not at an edge. */
}
}
a--;
pix_prevRow--;
pix_nextRow--;
pix_prevCol--;
pix_nextCol--;
}
}
rsize[0] = in_isz; /* Fill in our return sizes for edges + fill. */
rsize[1] = in_osz;
rsize[2] = in_gsz;
}
static void do_adjacentEdgeDetection(uint t,
uint rw,
const uint *limask,
const uint *lomask,
uint *lres,
float *res,
uint *rsize,
uint in_isz,
uint in_osz,
uint in_gsz)
{
int x; /* Pixel loop counter. */
int a; /* Pixel loop counter. */
int dx; /* Delta x. */
int pix_prevRow; /* Pixel one row behind the one we are testing in a loop. */
int pix_nextRow; /* Pixel one row in front of the one we are testing in a loop. */
int pix_prevCol; /* Pixel one column behind the one we are testing in a loop. */
int pix_nextCol; /* Pixel one column in front of the one we are testing in a loop. */
/* Test all rows between the FIRST and LAST rows, excluding left and right edges */
for (x = (t - rw) + 1, dx = x - (rw - 2); dx > rw; x -= rw, dx -= rw) {
a = x - 2;
pix_prevRow = a + rw;
pix_nextRow = a - rw;
pix_prevCol = a + 1;
pix_nextCol = a - 1;
while (a > dx - 2) {
if (!limask[a]) { /* If the inner mask is empty. */
if (lomask[a]) { /* If the outer mask is full. */
/*
* Next we test all 4 directions around the current pixel: next/previous/up/down
* The test ensures that the outer mask is empty and that the inner mask
* is also empty. If both conditions are true for any one of the 4 adjacent pixels
* then the current pixel is counted as being a true outer edge pixel.
*/
if ((!lomask[pix_nextCol] && !limask[pix_nextCol]) ||
(!lomask[pix_prevCol] && !limask[pix_prevCol]) ||
(!lomask[pix_nextRow] && !limask[pix_nextRow]) ||
(!lomask[pix_prevRow] && !limask[pix_prevRow])) {
in_osz++; /* Increment the outer boundary pixel count. */
lres[a] = 3; /* Flag pixel as part of outer edge. */
}
else { /* It's not a boundary pixel, but it is a gradient pixel. */
in_gsz++; /* Increment the gradient pixel count. */
lres[a] = 2; /* Flag pixel as gradient. */
}
}
}
else {
if ((!limask[pix_nextCol] && lomask[pix_nextCol]) ||
(!limask[pix_prevCol] && lomask[pix_prevCol]) ||
(!limask[pix_nextRow] && lomask[pix_nextRow]) ||
(!limask[pix_prevRow] && lomask[pix_prevRow])) {
in_isz++; /* Increment the inner boundary pixel count. */
lres[a] = 4; /* Flag pixel as part of inner edge. */
}
else {
res[a] = 1.0f; /* Pixel is part of inner mask, but not at an edge. */
}
}
a--;
pix_prevRow--; /* Advance all four "surrounding" pixel pointers. */
pix_nextRow--;
pix_prevCol--;
pix_nextCol--;
}
}
rsize[0] = in_isz; /* Fill in our return sizes for edges + fill. */
rsize[1] = in_osz;
rsize[2] = in_gsz;
}
static void do_createEdgeLocationBuffer(uint t,
uint rw,
const uint *lres,
float *res,
ushort *gbuf,
uint *inner_edge_offset,
uint *outer_edge_offset,
uint isz,
uint gsz)
{
int x; /* Pixel loop counter. */
int a; /* Temporary pixel index buffer loop counter. */
uint ud; /* Unscaled edge distance. */
uint dmin; /* Minimum edge distance. */
uint rsl; /* Long used for finding fast `1.0/sqrt`. */
uint gradient_fill_offset;
/* For looping inner edge pixel indexes, represents current position from offset. */
uint inner_accum = 0;
/* For looping outer edge pixel indexes, represents current position from offset. */
uint outer_accum = 0;
/* For looping gradient pixel indexes, represents current position from offset. */
uint gradient_accum = 0;
/* Disable clang-format to prevent line-wrapping. */
/* clang-format off */
/*
* Here we compute the size of buffer needed to hold (row,col) coordinates
* for each pixel previously determined to be either gradient, inner edge,
* or outer edge.
*
* Allocation is done by requesting 4 bytes "sizeof(int)" per pixel, even
* though gbuf[] is declared as `(ushort *)` (2 bytes) because we don't
* store the pixel indexes, we only store x,y location of pixel in buffer.
*
* This does make the assumption that x and y can fit in 16 unsigned bits
* so if Blender starts doing renders greater than 65536 in either direction
* this will need to allocate gbuf[] as uint *and allocate 8 bytes
* per flagged pixel.
*
* In general, the buffer on-screen:
*
* Example: 9 by 9 pixel block
*
* `.` = Pixel non-white in both outer and inner mask.
* `o` = Pixel white in outer, but not inner mask, adjacent to "." pixel.
* `g` = Pixel white in outer, but not inner mask, not adjacent to "." pixel.
* `i` = Pixel white in inner mask, adjacent to "g" or "." pixel.
* `F` = Pixel white in inner mask, only adjacent to other pixels white in the inner mask.
*
*
* ......... <----- pixel #80
* ..oooo...
* .oggggo..
* .oggiggo.
* .ogi_figo.
* .oggiggo.
* .oggggo..
* ..oooo...
* pixel #00 -----> .........
*
* gsz = 18 (18 "g" pixels above)
* isz = 4 (4 "i" pixels above)
* osz = 18 (18 "o" pixels above)
*
*
* The memory in gbuf[] after filling will look like this:
*
* gradient_fill_offset (0 pixels) inner_edge_offset (18 pixels) outer_edge_offset (22 pixels)
* / / /
* / / /
* |X Y X Y X Y X Y > <X Y X Y > <X Y X Y X Y > <X Y X Y | <- (x,y)
* +--------------------------------> <----------------> <------------------------> <----------------+
* |0 2 4 6 8 10 12 14 > ... <68 70 72 74 > ... <80 82 84 86 88 90 > ... <152 154 156 158 | <- bytes
* +--------------------------------> <----------------> <------------------------> <----------------+
* |g0 g0 g1 g1 g2 g2 g3 g3 > <g17 g17 i0 i0 > <i2 i2 i3 i3 o0 o0 > <o16 o16 o17 o17 | <- pixel
* / / /
* / / /
* / / /
* +---------- gradient_accum (18) ---------+ +--- inner_accum (22) ---+ +--- outer_accum (40) ---+
*
*
* Ultimately we do need the pixel's memory buffer index to set the output
* pixel color, but it's faster to reconstruct the memory buffer location
* each iteration of the final gradient calculation than it is to deconstruct
* a memory location into x,y pairs each round.
*/
/* clang-format on */
gradient_fill_offset = 0; /* Since there are likely "more" of these, put it first. :). */
*inner_edge_offset = gradient_fill_offset + gsz; /* Set start of inner edge indexes. */
*outer_edge_offset = (*inner_edge_offset) + isz; /* Set start of outer edge indexes. */
/* Set the accumulators to correct positions */ /* Set up some accumulator variables for loops.
*/
gradient_accum = gradient_fill_offset; /* Each accumulator variable starts at its respective. */
inner_accum = *inner_edge_offset; /* Section's offset so when we start filling, each. */
outer_accum = *outer_edge_offset; /* Section fills up its allocated space in gbuf. */
/* Uses `dmin=row`, `rsl=col`. */
for (x = 0, dmin = 0; x < t; x += rw, dmin++) {
for (rsl = 0; rsl < rw; rsl++) {
a = x + rsl;
if (lres[a] == 2) { /* It is a gradient pixel flagged by 2. */
ud = gradient_accum << 1; /* Double the index to reach correct ushort location. */
gbuf[ud] = dmin; /* Insert pixel's row into gradient pixel location buffer. */
gbuf[ud + 1] = rsl; /* Insert pixel's column into gradient pixel location buffer. */
gradient_accum++; /* Increment gradient index buffer pointer. */
}
else if (lres[a] == 3) { /* It is an outer edge pixel flagged by 3. */
ud = outer_accum << 1; /* Double the index to reach correct ushort location. */
gbuf[ud] = dmin; /* Insert pixel's row into outer edge pixel location buffer. */
gbuf[ud + 1] = rsl; /* Insert pixel's column into outer edge pixel location buffer. */
outer_accum++; /* Increment outer edge index buffer pointer. */
res[a] = 0.0f; /* Set output pixel intensity now since it won't change later. */
}
else if (lres[a] == 4) { /* It is an inner edge pixel flagged by 4. */
ud = inner_accum << 1; /* Double int index to reach correct ushort location. */
gbuf[ud] = dmin; /* Insert pixel's row into inner edge pixel location buffer. */
gbuf[ud + 1] = rsl; /* Insert pixel's column into inner edge pixel location buffer. */
inner_accum++; /* Increment inner edge index buffer pointer. */
res[a] = 1.0f; /* Set output pixel intensity now since it won't change later. */
}
}
}
}
static void do_fillGradientBuffer(uint rw,
float *res,
const ushort *gbuf,
uint isz,
uint osz,
uint gsz,
uint inner_edge_offset,
uint outer_edge_offset)
{
int x; /* Pixel loop counter. */
int a; /* Temporary pixel index buffer loop counter. */
int fsz; /* Size of the frame. */
uint rsl; /* Long used for finding fast `1.0/sqrt`. */
float rsf; /* Float used for finding fast `1.0/sqrt`. */
const float rsopf = 1.5f; /* Constant float used for finding fast `1.0/sqrt`. */
uint gradient_fill_offset;
uint t;
uint ud; /* Unscaled edge distance. */
uint dmin; /* Minimum edge distance. */
float odist; /* Current outer edge distance. */
float idist; /* Current inner edge distance. */
int dx; /* X-delta (used for distance proportion calculation) */
int dy; /* Y-delta (used for distance proportion calculation) */
/*
* The general algorithm used to color each gradient pixel is:
*
* 1.) Loop through all gradient pixels.
* A.) For each gradient pixel:
* a.) Loop through all outside edge pixels, looking for closest one
* to the gradient pixel we are in.
* b.) Loop through all inside edge pixels, looking for closest one
* to the gradient pixel we are in.
* c.) Find proportion of distance from gradient pixel to inside edge
* pixel compared to sum of distance to inside edge and distance to
* outside edge.
*
* In an image where:
* `.` = Blank (black) pixels, not covered by inner mask or outer mask.
* `+` = Desired gradient pixels, covered only by outer mask.
* `*` = White full mask pixels, covered by at least inner mask.
*
* ...............................
* ...............+++++++++++.....
* ...+O++++++..++++++++++++++....
* ..+++\++++++++++++++++++++.....
* .+++++G+++++++++*******+++.....
* .+++++|+++++++*********+++.....
* .++***I****************+++.....
* .++*******************+++......
* .+++*****************+++.......
* ..+++***************+++........
* ....+++**********+++...........
* ......++++++++++++.............
* ...............................
*
* O = outside edge pixel
* \
* G = gradient pixel
* |
* I = inside edge pixel
*
* __
* *note that IO does not need to be a straight line, in fact
* many cases can arise where straight lines do not work
* correctly.
*
* __ __ __
* d.) Pixel color is assigned as |GO| / ( |GI| + |GO| )
*
* The implementation does not compute distance, but the reciprocal of the
* distance. This is done to avoid having to compute a square root, as a
* reciprocal square root can be computed faster. Therefore, the code computes
* pixel color as |GI| / (|GI| + |GO|). Since these are reciprocals, GI serves the
* purpose of GO for the proportion calculation.
*
* For the purposes of the minimum distance comparisons, we only check
* the sums-of-squares against each other, since they are in the same
* mathematical sort-order as if we did go ahead and take square roots
*
* Loop through all gradient pixels.
*/
for (x = gsz - 1; x >= 0; x--) {
gradient_fill_offset = x << 1;
t = gbuf[gradient_fill_offset]; /* Calculate column of pixel indexed by `gbuf[x]`. */
fsz = gbuf[gradient_fill_offset + 1]; /* Calculate row of pixel indexed by `gbuf[x]`. */
dmin = 0xffffffff; /* Reset min distance to edge pixel. */
for (a = outer_edge_offset + osz - 1; a >= outer_edge_offset;
a--) { /* Loop through all outer edge buffer pixels. */
ud = a << 1;
dy = t - gbuf[ud]; /* Set dx to gradient pixel column - outer edge pixel row. */
dx = fsz - gbuf[ud + 1]; /* Set dy to gradient pixel row - outer edge pixel column. */
ud = dx * dx + dy * dy; /* Compute sum of squares. */
if (ud < dmin) { /* If our new sum of squares is less than the current minimum. */
dmin = ud; /* Set a new minimum equal to the new lower value. */
}
}
odist = float(dmin); /* Cast outer min to a float. */
rsf = odist * 0.5f;
rsl = *(uint *)&odist; /* Use some peculiar properties of the way bits are stored. */
rsl = 0x5f3759df - (rsl >> 1); /* In floats vs. uints to compute an approximate. */
odist = *(float *)&rsl; /* Reciprocal square root. */
odist = odist * (rsopf - (rsf * odist *
odist)); /* -- This line can be iterated for more accuracy. -- */
dmin = 0xffffffff; /* Reset min distance to edge pixel. */
for (a = inner_edge_offset + isz - 1; a >= inner_edge_offset;
a--) { /* Loop through all inside edge pixels. */
ud = a << 1;
dy = t - gbuf[ud]; /* Compute delta in Y from gradient pixel to inside edge pixel. */
dx = fsz - gbuf[ud + 1]; /* Compute delta in X from gradient pixel to inside edge pixel. */
ud = dx * dx + dy * dy; /* Compute sum of squares. */
if (ud <
dmin) { /* If our new sum of squares is less than the current minimum we've found. */
dmin = ud; /* Set a new minimum equal to the new lower value. */
}
}
/* Cast inner min to a float. */
idist = float(dmin);
rsf = idist * 0.5f;
rsl = *(uint *)&idist;
/* See notes above. */
rsl = 0x5f3759df - (rsl >> 1);
idist = *(float *)&rsl;
idist = idist * (rsopf - (rsf * idist * idist));
/* NOTE: once again that since we are using reciprocals of distance values our
* proportion is already the correct intensity, and does not need to be
* subtracted from 1.0 like it would have if we used real distances. */
/* Here we reconstruct the pixel's memory location in the CompBuf by
* `Pixel Index = Pixel Column + ( Pixel Row * Row Width )`. */
res[gbuf[gradient_fill_offset + 1] + (gbuf[gradient_fill_offset] * rw)] =
(idist / (idist + odist)); /* Set intensity. */
}
}
/* End of copy. */
void DoubleEdgeMaskOperation::do_double_edge_mask(float *imask, float *omask, float *res)
{
uint *lres; /* Pointer to output pixel buffer (for bit operations). */
uint *limask; /* Pointer to inner mask (for bit operations). */
uint *lomask; /* Pointer to outer mask (for bit operations). */
int rw; /* Pixel row width. */
int t; /* Total number of pixels in buffer - 1 (used for loop starts). */
int fsz; /* Size of the frame. */
uint isz = 0; /* Size (in pixels) of inside edge pixel index buffer. */
uint osz = 0; /* Size (in pixels) of outside edge pixel index buffer. */
uint gsz = 0; /* Size (in pixels) of gradient pixel index buffer. */
uint rsize[3]; /* Size storage to pass to helper functions. */
uint inner_edge_offset = 0; /* Offset into final buffer where inner edge pixel indexes start. */
uint outer_edge_offset = 0; /* Offset into final buffer where outer edge pixel indexes start. */
ushort *gbuf; /* Gradient/inner/outer pixel location index buffer. */
if (true) { /* If both input sockets have some data coming in... */
rw = this->get_width(); /* Width of a row of pixels. */
t = (rw * this->get_height()) - 1; /* Determine size of the frame. */
memset(res,
0,
sizeof(float) *
(t + 1)); /* Clear output buffer (not all pixels will be written later). */
lres = (uint *)res; /* Pointer to output buffer (for bit level ops).. */
limask = (uint *)imask; /* Pointer to input mask (for bit level ops).. */
lomask = (uint *)omask; /* Pointer to output mask (for bit level ops).. */
/*
* The whole buffer is broken up into 4 parts. The four CORNERS, the FIRST and LAST rows, the
* LEFT and RIGHT edges (excluding the corner pixels), and all OTHER rows.
* This allows for quick computation of outer edge pixels where
* a screen edge pixel is marked to be gradient.
*
* The pixel type (gradient vs inner-edge vs outer-edge) tests change
* depending on the user selected "Inner Edge Mode" and the user selected
* "Buffer Edge Mode" on the node's GUI. There are 4 sets of basically the
* same algorithm:
*
* 1.) Inner Edge -> Adjacent Only
* Buffer Edge -> Keep Inside
*
* 2.) Inner Edge -> Adjacent Only
* Buffer Edge -> Bleed Out
*
* 3.) Inner Edge -> All
* Buffer Edge -> Keep Inside
*
* 4.) Inner Edge -> All
* Buffer Edge -> Bleed Out
*
* Each version has slightly different criteria for detecting an edge pixel.
*/
if (adjacent_only_) { /* If "adjacent only" inner edge mode is turned on. */
if (keep_inside_) { /* If "keep inside" buffer edge mode is turned on. */
do_adjacentKeepBorders(t, rw, limask, lomask, lres, res, rsize);
}
else { /* "bleed out" buffer edge mode is turned on. */
do_adjacentBleedBorders(t, rw, limask, lomask, lres, res, rsize);
}
/* Set up inner edge, outer edge, and gradient buffer sizes after border pass. */
isz = rsize[0];
osz = rsize[1];
gsz = rsize[2];
/* Detect edges in all non-border pixels in the buffer. */
do_adjacentEdgeDetection(t, rw, limask, lomask, lres, res, rsize, isz, osz, gsz);
}
else { /* "all" inner edge mode is turned on. */
if (keep_inside_) { /* If "keep inside" buffer edge mode is turned on. */
do_allKeepBorders(t, rw, limask, lomask, lres, res, rsize);
}
else { /* "bleed out" buffer edge mode is turned on. */
do_allBleedBorders(t, rw, limask, lomask, lres, res, rsize);
}
/* Set up inner edge, outer edge, and gradient buffer sizes after border pass. */
isz = rsize[0];
osz = rsize[1];
gsz = rsize[2];
/* Detect edges in all non-border pixels in the buffer. */
do_allEdgeDetection(t, rw, limask, lomask, lres, res, rsize, isz, osz, gsz);
}
/* Set edge and gradient buffer sizes once again...
* the sizes in rsize[] may have been modified
* by the `do_*EdgeDetection()` function. */
isz = rsize[0];
osz = rsize[1];
gsz = rsize[2];
/* Calculate size of pixel index buffer needed. */
fsz = gsz + isz + osz;
/* Allocate edge/gradient pixel index buffer. */
gbuf = (ushort *)MEM_callocN(sizeof(ushort) * fsz * 2, "DEM");
do_createEdgeLocationBuffer(
t, rw, lres, res, gbuf, &inner_edge_offset, &outer_edge_offset, isz, gsz);
do_fillGradientBuffer(rw, res, gbuf, isz, osz, gsz, inner_edge_offset, outer_edge_offset);
/* Free the gradient index buffer. */
MEM_freeN(gbuf);
}
}
DoubleEdgeMaskOperation::DoubleEdgeMaskOperation()
{
this->add_input_socket(DataType::Value);
this->add_input_socket(DataType::Value);
this->add_output_socket(DataType::Value);
input_inner_mask_ = nullptr;
input_outer_mask_ = nullptr;
adjacent_only_ = false;
keep_inside_ = false;
flags_.complex = true;
is_output_rendered_ = false;
}
bool DoubleEdgeMaskOperation::determine_depending_area_of_interest(
rcti * /*input*/, ReadBufferOperation *read_operation, rcti *output)
{
if (cached_instance_ == nullptr) {
rcti new_input;
new_input.xmax = this->get_width();
new_input.xmin = 0;
new_input.ymax = this->get_height();
new_input.ymin = 0;
return NodeOperation::determine_depending_area_of_interest(&new_input, read_operation, output);
}
return false;
}
void DoubleEdgeMaskOperation::init_execution()
{
input_inner_mask_ = this->get_input_socket_reader(0);
input_outer_mask_ = this->get_input_socket_reader(1);
init_mutex();
cached_instance_ = nullptr;
}
void *DoubleEdgeMaskOperation::initialize_tile_data(rcti *rect)
{
if (cached_instance_) {
return cached_instance_;
}
lock_mutex();
if (cached_instance_ == nullptr) {
MemoryBuffer *inner_mask = (MemoryBuffer *)input_inner_mask_->initialize_tile_data(rect);
MemoryBuffer *outer_mask = (MemoryBuffer *)input_outer_mask_->initialize_tile_data(rect);
float *data = (float *)MEM_mallocN(sizeof(float) * this->get_width() * this->get_height(),
__func__);
float *imask = inner_mask->get_buffer();
float *omask = outer_mask->get_buffer();
do_double_edge_mask(imask, omask, data);
cached_instance_ = data;
}
unlock_mutex();
return cached_instance_;
}
void DoubleEdgeMaskOperation::execute_pixel(float output[4], int x, int y, void *data)
{
float *buffer = (float *)data;
int index = (y * this->get_width() + x);
output[0] = buffer[index];
}
void DoubleEdgeMaskOperation::deinit_execution()
{
input_inner_mask_ = nullptr;
input_outer_mask_ = nullptr;
deinit_mutex();
if (cached_instance_) {
MEM_freeN(cached_instance_);
cached_instance_ = nullptr;
}
}
void DoubleEdgeMaskOperation::get_area_of_interest(int UNUSED(input_idx),
const rcti &UNUSED(output_area),
rcti &r_input_area)
{
r_input_area = this->get_canvas();
}
void DoubleEdgeMaskOperation::update_memory_buffer(MemoryBuffer *output,
const rcti &UNUSED(area),
Span<MemoryBuffer *> inputs)
{
if (!is_output_rendered_) {
/* Ensure full buffers to work with no strides. */
MemoryBuffer *input_inner_mask = inputs[0];
MemoryBuffer *inner_mask = input_inner_mask->is_a_single_elem() ? input_inner_mask->inflate() :
input_inner_mask;
MemoryBuffer *input_outer_mask = inputs[1];
MemoryBuffer *outer_mask = input_outer_mask->is_a_single_elem() ? input_outer_mask->inflate() :
input_outer_mask;
BLI_assert(output->get_width() == this->get_width());
BLI_assert(output->get_height() == this->get_height());
/* TODO(manzanilla): Once tiled implementation is removed, use execution system to run
* multi-threaded where possible. */
do_double_edge_mask(inner_mask->get_buffer(), outer_mask->get_buffer(), output->get_buffer());
is_output_rendered_ = true;
if (inner_mask != input_inner_mask) {
delete inner_mask;
}
if (outer_mask != input_outer_mask) {
delete outer_mask;
}
}
}
} // namespace blender::compositor
|