-
Notifications
You must be signed in to change notification settings - Fork 0
/
pngtrans.c.gcov
866 lines (866 loc) · 38.3 KB
/
pngtrans.c.gcov
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
-: 0:Source:pngtrans.c
-: 0:Programs:15
-: 1:
-: 2:/* pngtrans.c - transforms the data in a row (used by both readers and writers)
-: 3: *
-: 4: * Last changed in libpng 1.6.33 [September 28, 2017]
-: 5: * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
-: 6: * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
-: 7: * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
-: 8: *
-: 9: * This code is released under the libpng license.
-: 10: * For conditions of distribution and use, see the disclaimer
-: 11: * and license in png.h
-: 12: */
-: 13:
-: 14:#include "pngpriv.h"
-: 15:
-: 16:#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-: 17:
-: 18:#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
-: 19:/* Turn on BGR-to-RGB mapping */
-: 20:void PNGAPI
#####: 21:png_set_bgr(png_structrp png_ptr)
-: 22:{
-: 23: png_debug(1, "in png_set_bgr");
-: 24:
#####: 25: if (png_ptr == NULL)
#####: 26: return;
-: 27:
#####: 28: png_ptr->transformations |= PNG_BGR;
-: 29:}
-: 30:#endif
-: 31:
-: 32:#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
-: 33:/* Turn on 16-bit byte swapping */
-: 34:void PNGAPI
#####: 35:png_set_swap(png_structrp png_ptr)
-: 36:{
-: 37: png_debug(1, "in png_set_swap");
-: 38:
#####: 39: if (png_ptr == NULL)
#####: 40: return;
-: 41:
#####: 42: if (png_ptr->bit_depth == 16)
#####: 43: png_ptr->transformations |= PNG_SWAP_BYTES;
-: 44:}
-: 45:#endif
-: 46:
-: 47:#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
-: 48:/* Turn on pixel packing */
-: 49:void PNGAPI
#####: 50:png_set_packing(png_structrp png_ptr)
-: 51:{
-: 52: png_debug(1, "in png_set_packing");
-: 53:
#####: 54: if (png_ptr == NULL)
#####: 55: return;
-: 56:
#####: 57: if (png_ptr->bit_depth < 8)
-: 58: {
#####: 59: png_ptr->transformations |= PNG_PACK;
-: 60:# ifdef PNG_WRITE_SUPPORTED
#####: 61: png_ptr->usr_bit_depth = 8;
-: 62:# endif
-: 63: }
-: 64:}
-: 65:#endif
-: 66:
-: 67:#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
-: 68:/* Turn on packed pixel swapping */
-: 69:void PNGAPI
#####: 70:png_set_packswap(png_structrp png_ptr)
-: 71:{
-: 72: png_debug(1, "in png_set_packswap");
-: 73:
#####: 74: if (png_ptr == NULL)
#####: 75: return;
-: 76:
#####: 77: if (png_ptr->bit_depth < 8)
#####: 78: png_ptr->transformations |= PNG_PACKSWAP;
-: 79:}
-: 80:#endif
-: 81:
-: 82:#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
-: 83:void PNGAPI
#####: 84:png_set_shift(png_structrp png_ptr, png_const_color_8p true_bits)
-: 85:{
-: 86: png_debug(1, "in png_set_shift");
-: 87:
#####: 88: if (png_ptr == NULL)
#####: 89: return;
-: 90:
#####: 91: png_ptr->transformations |= PNG_SHIFT;
#####: 92: png_ptr->shift = *true_bits;
-: 93:}
-: 94:#endif
-: 95:
-: 96:#if defined(PNG_READ_INTERLACING_SUPPORTED) || \
-: 97: defined(PNG_WRITE_INTERLACING_SUPPORTED)
-: 98:int PNGAPI
6: 99:png_set_interlace_handling(png_structrp png_ptr)
-: 100:{
-: 101: png_debug(1, "in png_set_interlace handling");
-: 102:
6: 103: if (png_ptr != 0 && png_ptr->interlaced != 0)
-: 104: {
#####: 105: png_ptr->transformations |= PNG_INTERLACE;
#####: 106: return (7);
-: 107: }
-: 108:
6: 109: return (1);
-: 110:}
-: 111:#endif
-: 112:
-: 113:#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
-: 114:/* Add a filler byte on read, or remove a filler or alpha byte on write.
-: 115: * The filler type has changed in v0.95 to allow future 2-byte fillers
-: 116: * for 48-bit input data, as well as to avoid problems with some compilers
-: 117: * that don't like bytes as parameters.
-: 118: */
-: 119:void PNGAPI
#####: 120:png_set_filler(png_structrp png_ptr, png_uint_32 filler, int filler_loc)
-: 121:{
-: 122: png_debug(1, "in png_set_filler");
-: 123:
#####: 124: if (png_ptr == NULL)
#####: 125: return;
-: 126:
-: 127: /* In libpng 1.6 it is possible to determine whether this is a read or write
-: 128: * operation and therefore to do more checking here for a valid call.
-: 129: */
#####: 130: if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0)
-: 131: {
-: 132:# ifdef PNG_READ_FILLER_SUPPORTED
-: 133: /* On read png_set_filler is always valid, regardless of the base PNG
-: 134: * format, because other transformations can give a format where the
-: 135: * filler code can execute (basically an 8 or 16-bit component RGB or G
-: 136: * format.)
-: 137: *
-: 138: * NOTE: usr_channels is not used by the read code! (This has led to
-: 139: * confusion in the past.) The filler is only used in the read code.
-: 140: */
#####: 141: png_ptr->filler = (png_uint_16)filler;
-: 142:# else
-: 143: png_app_error(png_ptr, "png_set_filler not supported on read");
-: 144: PNG_UNUSED(filler) /* not used in the write case */
-: 145: return;
-: 146:# endif
-: 147: }
-: 148:
-: 149: else /* write */
-: 150: {
-: 151:# ifdef PNG_WRITE_FILLER_SUPPORTED
-: 152: /* On write the usr_channels parameter must be set correctly at the
-: 153: * start to record the number of channels in the app-supplied data.
-: 154: */
#####: 155: switch (png_ptr->color_type)
-: 156: {
-: 157: case PNG_COLOR_TYPE_RGB:
#####: 158: png_ptr->usr_channels = 4;
#####: 159: break;
-: 160:
-: 161: case PNG_COLOR_TYPE_GRAY:
#####: 162: if (png_ptr->bit_depth >= 8)
-: 163: {
#####: 164: png_ptr->usr_channels = 2;
#####: 165: break;
-: 166: }
-: 167:
-: 168: else
-: 169: {
-: 170: /* There simply isn't any code in libpng to strip out bits
-: 171: * from bytes when the components are less than a byte in
-: 172: * size!
-: 173: */
#####: 174: png_app_error(png_ptr,
-: 175: "png_set_filler is invalid for"
-: 176: " low bit depth gray output");
#####: 177: return;
-: 178: }
-: 179:
-: 180: default:
#####: 181: png_app_error(png_ptr,
-: 182: "png_set_filler: inappropriate color type");
#####: 183: return;
-: 184: }
-: 185:# else
-: 186: png_app_error(png_ptr, "png_set_filler not supported on write");
-: 187: return;
-: 188:# endif
-: 189: }
-: 190:
-: 191: /* Here on success - libpng supports the operation, set the transformation
-: 192: * and the flag to say where the filler channel is.
-: 193: */
#####: 194: png_ptr->transformations |= PNG_FILLER;
-: 195:
#####: 196: if (filler_loc == PNG_FILLER_AFTER)
#####: 197: png_ptr->flags |= PNG_FLAG_FILLER_AFTER;
-: 198:
-: 199: else
#####: 200: png_ptr->flags &= ~PNG_FLAG_FILLER_AFTER;
-: 201:}
-: 202:
-: 203:/* Added to libpng-1.2.7 */
-: 204:void PNGAPI
#####: 205:png_set_add_alpha(png_structrp png_ptr, png_uint_32 filler, int filler_loc)
-: 206:{
-: 207: png_debug(1, "in png_set_add_alpha");
-: 208:
#####: 209: if (png_ptr == NULL)
#####: 210: return;
-: 211:
#####: 212: png_set_filler(png_ptr, filler, filler_loc);
-: 213: /* The above may fail to do anything. */
#####: 214: if ((png_ptr->transformations & PNG_FILLER) != 0)
#####: 215: png_ptr->transformations |= PNG_ADD_ALPHA;
-: 216:}
-: 217:
-: 218:#endif
-: 219:
-: 220:#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \
-: 221: defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
-: 222:void PNGAPI
#####: 223:png_set_swap_alpha(png_structrp png_ptr)
-: 224:{
-: 225: png_debug(1, "in png_set_swap_alpha");
-: 226:
#####: 227: if (png_ptr == NULL)
#####: 228: return;
-: 229:
#####: 230: png_ptr->transformations |= PNG_SWAP_ALPHA;
-: 231:}
-: 232:#endif
-: 233:
-: 234:#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \
-: 235: defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
-: 236:void PNGAPI
#####: 237:png_set_invert_alpha(png_structrp png_ptr)
-: 238:{
-: 239: png_debug(1, "in png_set_invert_alpha");
-: 240:
#####: 241: if (png_ptr == NULL)
#####: 242: return;
-: 243:
#####: 244: png_ptr->transformations |= PNG_INVERT_ALPHA;
-: 245:}
-: 246:#endif
-: 247:
-: 248:#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
-: 249:void PNGAPI
#####: 250:png_set_invert_mono(png_structrp png_ptr)
-: 251:{
-: 252: png_debug(1, "in png_set_invert_mono");
-: 253:
#####: 254: if (png_ptr == NULL)
#####: 255: return;
-: 256:
#####: 257: png_ptr->transformations |= PNG_INVERT_MONO;
-: 258:}
-: 259:
-: 260:/* Invert monochrome grayscale data */
-: 261:void /* PRIVATE */
#####: 262:png_do_invert(png_row_infop row_info, png_bytep row)
-: 263:{
-: 264: png_debug(1, "in png_do_invert");
-: 265:
-: 266: /* This test removed from libpng version 1.0.13 and 1.2.0:
-: 267: * if (row_info->bit_depth == 1 &&
-: 268: */
#####: 269: if (row_info->color_type == PNG_COLOR_TYPE_GRAY)
-: 270: {
#####: 271: png_bytep rp = row;
-: 272: png_size_t i;
#####: 273: png_size_t istop = row_info->rowbytes;
-: 274:
#####: 275: for (i = 0; i < istop; i++)
-: 276: {
#####: 277: *rp = (png_byte)(~(*rp));
#####: 278: rp++;
-: 279: }
-: 280: }
-: 281:
#####: 282: else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
#####: 283: row_info->bit_depth == 8)
#####: 284: {
#####: 285: png_bytep rp = row;
-: 286: png_size_t i;
#####: 287: png_size_t istop = row_info->rowbytes;
-: 288:
#####: 289: for (i = 0; i < istop; i += 2)
-: 290: {
#####: 291: *rp = (png_byte)(~(*rp));
#####: 292: rp += 2;
-: 293: }
-: 294: }
-: 295:
-: 296:#ifdef PNG_16BIT_SUPPORTED
#####: 297: else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
#####: 298: row_info->bit_depth == 16)
-: 299: {
#####: 300: png_bytep rp = row;
-: 301: png_size_t i;
#####: 302: png_size_t istop = row_info->rowbytes;
-: 303:
#####: 304: for (i = 0; i < istop; i += 4)
-: 305: {
#####: 306: *rp = (png_byte)(~(*rp));
#####: 307: *(rp + 1) = (png_byte)(~(*(rp + 1)));
#####: 308: rp += 4;
-: 309: }
-: 310: }
-: 311:#endif
#####: 312:}
-: 313:#endif
-: 314:
-: 315:#ifdef PNG_16BIT_SUPPORTED
-: 316:#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
-: 317:/* Swaps byte order on 16-bit depth images */
-: 318:void /* PRIVATE */
#####: 319:png_do_swap(png_row_infop row_info, png_bytep row)
-: 320:{
-: 321: png_debug(1, "in png_do_swap");
-: 322:
#####: 323: if (row_info->bit_depth == 16)
-: 324: {
#####: 325: png_bytep rp = row;
-: 326: png_uint_32 i;
#####: 327: png_uint_32 istop= row_info->width * row_info->channels;
-: 328:
#####: 329: for (i = 0; i < istop; i++, rp += 2)
-: 330: {
-: 331:#ifdef PNG_BUILTIN_BSWAP16_SUPPORTED
-: 332: /* Feature added to libpng-1.6.11 for testing purposes, not
-: 333: * enabled by default.
-: 334: */
-: 335: *(png_uint_16*)rp = __builtin_bswap16(*(png_uint_16*)rp);
-: 336:#else
#####: 337: png_byte t = *rp;
#####: 338: *rp = *(rp + 1);
#####: 339: *(rp + 1) = t;
-: 340:#endif
-: 341: }
-: 342: }
#####: 343:}
-: 344:#endif
-: 345:#endif
-: 346:
-: 347:#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
-: 348:static PNG_CONST png_byte onebppswaptable[256] = {
-: 349: 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0,
-: 350: 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
-: 351: 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8,
-: 352: 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
-: 353: 0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4,
-: 354: 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
-: 355: 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC,
-: 356: 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
-: 357: 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2,
-: 358: 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
-: 359: 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA,
-: 360: 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
-: 361: 0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6,
-: 362: 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
-: 363: 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE,
-: 364: 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
-: 365: 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1,
-: 366: 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
-: 367: 0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9,
-: 368: 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
-: 369: 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5,
-: 370: 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
-: 371: 0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED,
-: 372: 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
-: 373: 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3,
-: 374: 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
-: 375: 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB,
-: 376: 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
-: 377: 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7,
-: 378: 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
-: 379: 0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF,
-: 380: 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
-: 381:};
-: 382:
-: 383:static PNG_CONST png_byte twobppswaptable[256] = {
-: 384: 0x00, 0x40, 0x80, 0xC0, 0x10, 0x50, 0x90, 0xD0,
-: 385: 0x20, 0x60, 0xA0, 0xE0, 0x30, 0x70, 0xB0, 0xF0,
-: 386: 0x04, 0x44, 0x84, 0xC4, 0x14, 0x54, 0x94, 0xD4,
-: 387: 0x24, 0x64, 0xA4, 0xE4, 0x34, 0x74, 0xB4, 0xF4,
-: 388: 0x08, 0x48, 0x88, 0xC8, 0x18, 0x58, 0x98, 0xD8,
-: 389: 0x28, 0x68, 0xA8, 0xE8, 0x38, 0x78, 0xB8, 0xF8,
-: 390: 0x0C, 0x4C, 0x8C, 0xCC, 0x1C, 0x5C, 0x9C, 0xDC,
-: 391: 0x2C, 0x6C, 0xAC, 0xEC, 0x3C, 0x7C, 0xBC, 0xFC,
-: 392: 0x01, 0x41, 0x81, 0xC1, 0x11, 0x51, 0x91, 0xD1,
-: 393: 0x21, 0x61, 0xA1, 0xE1, 0x31, 0x71, 0xB1, 0xF1,
-: 394: 0x05, 0x45, 0x85, 0xC5, 0x15, 0x55, 0x95, 0xD5,
-: 395: 0x25, 0x65, 0xA5, 0xE5, 0x35, 0x75, 0xB5, 0xF5,
-: 396: 0x09, 0x49, 0x89, 0xC9, 0x19, 0x59, 0x99, 0xD9,
-: 397: 0x29, 0x69, 0xA9, 0xE9, 0x39, 0x79, 0xB9, 0xF9,
-: 398: 0x0D, 0x4D, 0x8D, 0xCD, 0x1D, 0x5D, 0x9D, 0xDD,
-: 399: 0x2D, 0x6D, 0xAD, 0xED, 0x3D, 0x7D, 0xBD, 0xFD,
-: 400: 0x02, 0x42, 0x82, 0xC2, 0x12, 0x52, 0x92, 0xD2,
-: 401: 0x22, 0x62, 0xA2, 0xE2, 0x32, 0x72, 0xB2, 0xF2,
-: 402: 0x06, 0x46, 0x86, 0xC6, 0x16, 0x56, 0x96, 0xD6,
-: 403: 0x26, 0x66, 0xA6, 0xE6, 0x36, 0x76, 0xB6, 0xF6,
-: 404: 0x0A, 0x4A, 0x8A, 0xCA, 0x1A, 0x5A, 0x9A, 0xDA,
-: 405: 0x2A, 0x6A, 0xAA, 0xEA, 0x3A, 0x7A, 0xBA, 0xFA,
-: 406: 0x0E, 0x4E, 0x8E, 0xCE, 0x1E, 0x5E, 0x9E, 0xDE,
-: 407: 0x2E, 0x6E, 0xAE, 0xEE, 0x3E, 0x7E, 0xBE, 0xFE,
-: 408: 0x03, 0x43, 0x83, 0xC3, 0x13, 0x53, 0x93, 0xD3,
-: 409: 0x23, 0x63, 0xA3, 0xE3, 0x33, 0x73, 0xB3, 0xF3,
-: 410: 0x07, 0x47, 0x87, 0xC7, 0x17, 0x57, 0x97, 0xD7,
-: 411: 0x27, 0x67, 0xA7, 0xE7, 0x37, 0x77, 0xB7, 0xF7,
-: 412: 0x0B, 0x4B, 0x8B, 0xCB, 0x1B, 0x5B, 0x9B, 0xDB,
-: 413: 0x2B, 0x6B, 0xAB, 0xEB, 0x3B, 0x7B, 0xBB, 0xFB,
-: 414: 0x0F, 0x4F, 0x8F, 0xCF, 0x1F, 0x5F, 0x9F, 0xDF,
-: 415: 0x2F, 0x6F, 0xAF, 0xEF, 0x3F, 0x7F, 0xBF, 0xFF
-: 416:};
-: 417:
-: 418:static PNG_CONST png_byte fourbppswaptable[256] = {
-: 419: 0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70,
-: 420: 0x80, 0x90, 0xA0, 0xB0, 0xC0, 0xD0, 0xE0, 0xF0,
-: 421: 0x01, 0x11, 0x21, 0x31, 0x41, 0x51, 0x61, 0x71,
-: 422: 0x81, 0x91, 0xA1, 0xB1, 0xC1, 0xD1, 0xE1, 0xF1,
-: 423: 0x02, 0x12, 0x22, 0x32, 0x42, 0x52, 0x62, 0x72,
-: 424: 0x82, 0x92, 0xA2, 0xB2, 0xC2, 0xD2, 0xE2, 0xF2,
-: 425: 0x03, 0x13, 0x23, 0x33, 0x43, 0x53, 0x63, 0x73,
-: 426: 0x83, 0x93, 0xA3, 0xB3, 0xC3, 0xD3, 0xE3, 0xF3,
-: 427: 0x04, 0x14, 0x24, 0x34, 0x44, 0x54, 0x64, 0x74,
-: 428: 0x84, 0x94, 0xA4, 0xB4, 0xC4, 0xD4, 0xE4, 0xF4,
-: 429: 0x05, 0x15, 0x25, 0x35, 0x45, 0x55, 0x65, 0x75,
-: 430: 0x85, 0x95, 0xA5, 0xB5, 0xC5, 0xD5, 0xE5, 0xF5,
-: 431: 0x06, 0x16, 0x26, 0x36, 0x46, 0x56, 0x66, 0x76,
-: 432: 0x86, 0x96, 0xA6, 0xB6, 0xC6, 0xD6, 0xE6, 0xF6,
-: 433: 0x07, 0x17, 0x27, 0x37, 0x47, 0x57, 0x67, 0x77,
-: 434: 0x87, 0x97, 0xA7, 0xB7, 0xC7, 0xD7, 0xE7, 0xF7,
-: 435: 0x08, 0x18, 0x28, 0x38, 0x48, 0x58, 0x68, 0x78,
-: 436: 0x88, 0x98, 0xA8, 0xB8, 0xC8, 0xD8, 0xE8, 0xF8,
-: 437: 0x09, 0x19, 0x29, 0x39, 0x49, 0x59, 0x69, 0x79,
-: 438: 0x89, 0x99, 0xA9, 0xB9, 0xC9, 0xD9, 0xE9, 0xF9,
-: 439: 0x0A, 0x1A, 0x2A, 0x3A, 0x4A, 0x5A, 0x6A, 0x7A,
-: 440: 0x8A, 0x9A, 0xAA, 0xBA, 0xCA, 0xDA, 0xEA, 0xFA,
-: 441: 0x0B, 0x1B, 0x2B, 0x3B, 0x4B, 0x5B, 0x6B, 0x7B,
-: 442: 0x8B, 0x9B, 0xAB, 0xBB, 0xCB, 0xDB, 0xEB, 0xFB,
-: 443: 0x0C, 0x1C, 0x2C, 0x3C, 0x4C, 0x5C, 0x6C, 0x7C,
-: 444: 0x8C, 0x9C, 0xAC, 0xBC, 0xCC, 0xDC, 0xEC, 0xFC,
-: 445: 0x0D, 0x1D, 0x2D, 0x3D, 0x4D, 0x5D, 0x6D, 0x7D,
-: 446: 0x8D, 0x9D, 0xAD, 0xBD, 0xCD, 0xDD, 0xED, 0xFD,
-: 447: 0x0E, 0x1E, 0x2E, 0x3E, 0x4E, 0x5E, 0x6E, 0x7E,
-: 448: 0x8E, 0x9E, 0xAE, 0xBE, 0xCE, 0xDE, 0xEE, 0xFE,
-: 449: 0x0F, 0x1F, 0x2F, 0x3F, 0x4F, 0x5F, 0x6F, 0x7F,
-: 450: 0x8F, 0x9F, 0xAF, 0xBF, 0xCF, 0xDF, 0xEF, 0xFF
-: 451:};
-: 452:
-: 453:/* Swaps pixel packing order within bytes */
-: 454:void /* PRIVATE */
#####: 455:png_do_packswap(png_row_infop row_info, png_bytep row)
-: 456:{
-: 457: png_debug(1, "in png_do_packswap");
-: 458:
#####: 459: if (row_info->bit_depth < 8)
-: 460: {
-: 461: png_bytep rp;
-: 462: png_const_bytep end, table;
-: 463:
#####: 464: end = row + row_info->rowbytes;
-: 465:
#####: 466: if (row_info->bit_depth == 1)
#####: 467: table = onebppswaptable;
-: 468:
#####: 469: else if (row_info->bit_depth == 2)
#####: 470: table = twobppswaptable;
-: 471:
#####: 472: else if (row_info->bit_depth == 4)
#####: 473: table = fourbppswaptable;
-: 474:
-: 475: else
#####: 476: return;
-: 477:
#####: 478: for (rp = row; rp < end; rp++)
#####: 479: *rp = table[*rp];
-: 480: }
-: 481:}
-: 482:#endif /* PACKSWAP || WRITE_PACKSWAP */
-: 483:
-: 484:#if defined(PNG_WRITE_FILLER_SUPPORTED) || \
-: 485: defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
-: 486:/* Remove a channel - this used to be 'png_do_strip_filler' but it used a
-: 487: * somewhat weird combination of flags to determine what to do. All the calls
-: 488: * to png_do_strip_filler are changed in 1.5.2 to call this instead with the
-: 489: * correct arguments.
-: 490: *
-: 491: * The routine isn't general - the channel must be the channel at the start or
-: 492: * end (not in the middle) of each pixel.
-: 493: */
-: 494:void /* PRIVATE */
#####: 495:png_do_strip_channel(png_row_infop row_info, png_bytep row, int at_start)
-: 496:{
#####: 497: png_bytep sp = row; /* source pointer */
#####: 498: png_bytep dp = row; /* destination pointer */
#####: 499: png_bytep ep = row + row_info->rowbytes; /* One beyond end of row */
-: 500:
-: 501: /* At the start sp will point to the first byte to copy and dp to where
-: 502: * it is copied to. ep always points just beyond the end of the row, so
-: 503: * the loop simply copies (channels-1) channels until sp reaches ep.
-: 504: *
-: 505: * at_start: 0 -- convert AG, XG, ARGB, XRGB, AAGG, XXGG, etc.
-: 506: * nonzero -- convert GA, GX, RGBA, RGBX, GGAA, RRGGBBXX, etc.
-: 507: */
-: 508:
-: 509: /* GA, GX, XG cases */
#####: 510: if (row_info->channels == 2)
-: 511: {
#####: 512: if (row_info->bit_depth == 8)
-: 513: {
#####: 514: if (at_start != 0) /* Skip initial filler */
#####: 515: ++sp;
-: 516: else /* Skip initial channel and, for sp, the filler */
-: 517: {
#####: 518: sp += 2; ++dp;
-: 519: }
-: 520:
-: 521: /* For a 1 pixel wide image there is nothing to do */
#####: 522: while (sp < ep)
-: 523: {
#####: 524: *dp++ = *sp; sp += 2;
-: 525: }
-: 526:
#####: 527: row_info->pixel_depth = 8;
-: 528: }
-: 529:
#####: 530: else if (row_info->bit_depth == 16)
-: 531: {
#####: 532: if (at_start != 0) /* Skip initial filler */
#####: 533: sp += 2;
-: 534: else /* Skip initial channel and, for sp, the filler */
-: 535: {
#####: 536: sp += 4; dp += 2;
-: 537: }
-: 538:
#####: 539: while (sp < ep)
-: 540: {
#####: 541: *dp++ = *sp++; *dp++ = *sp; sp += 3;
-: 542: }
-: 543:
#####: 544: row_info->pixel_depth = 16;
-: 545: }
-: 546:
-: 547: else
#####: 548: return; /* bad bit depth */
-: 549:
#####: 550: row_info->channels = 1;
-: 551:
-: 552: /* Finally fix the color type if it records an alpha channel */
#####: 553: if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
#####: 554: row_info->color_type = PNG_COLOR_TYPE_GRAY;
-: 555: }
-: 556:
-: 557: /* RGBA, RGBX, XRGB cases */
#####: 558: else if (row_info->channels == 4)
-: 559: {
#####: 560: if (row_info->bit_depth == 8)
-: 561: {
#####: 562: if (at_start != 0) /* Skip initial filler */
#####: 563: ++sp;
-: 564: else /* Skip initial channels and, for sp, the filler */
-: 565: {
#####: 566: sp += 4; dp += 3;
-: 567: }
-: 568:
-: 569: /* Note that the loop adds 3 to dp and 4 to sp each time. */
#####: 570: while (sp < ep)
-: 571: {
#####: 572: *dp++ = *sp++; *dp++ = *sp++; *dp++ = *sp; sp += 2;
-: 573: }
-: 574:
#####: 575: row_info->pixel_depth = 24;
-: 576: }
-: 577:
#####: 578: else if (row_info->bit_depth == 16)
-: 579: {
#####: 580: if (at_start != 0) /* Skip initial filler */
#####: 581: sp += 2;
-: 582: else /* Skip initial channels and, for sp, the filler */
-: 583: {
#####: 584: sp += 8; dp += 6;
-: 585: }
-: 586:
#####: 587: while (sp < ep)
-: 588: {
-: 589: /* Copy 6 bytes, skip 2 */
#####: 590: *dp++ = *sp++; *dp++ = *sp++;
#####: 591: *dp++ = *sp++; *dp++ = *sp++;
#####: 592: *dp++ = *sp++; *dp++ = *sp; sp += 3;
-: 593: }
-: 594:
#####: 595: row_info->pixel_depth = 48;
-: 596: }
-: 597:
-: 598: else
#####: 599: return; /* bad bit depth */
-: 600:
#####: 601: row_info->channels = 3;
-: 602:
-: 603: /* Finally fix the color type if it records an alpha channel */
#####: 604: if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
#####: 605: row_info->color_type = PNG_COLOR_TYPE_RGB;
-: 606: }
-: 607:
-: 608: else
#####: 609: return; /* The filler channel has gone already */
-: 610:
-: 611: /* Fix the rowbytes value. */
#####: 612: row_info->rowbytes = (png_size_t)(dp-row);
-: 613:}
-: 614:#endif
-: 615:
-: 616:#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
-: 617:/* Swaps red and blue bytes within a pixel */
-: 618:void /* PRIVATE */
#####: 619:png_do_bgr(png_row_infop row_info, png_bytep row)
-: 620:{
-: 621: png_debug(1, "in png_do_bgr");
-: 622:
#####: 623: if ((row_info->color_type & PNG_COLOR_MASK_COLOR) != 0)
-: 624: {
#####: 625: png_uint_32 row_width = row_info->width;
#####: 626: if (row_info->bit_depth == 8)
-: 627: {
#####: 628: if (row_info->color_type == PNG_COLOR_TYPE_RGB)
-: 629: {
-: 630: png_bytep rp;
-: 631: png_uint_32 i;
-: 632:
#####: 633: for (i = 0, rp = row; i < row_width; i++, rp += 3)
-: 634: {
#####: 635: png_byte save = *rp;
#####: 636: *rp = *(rp + 2);
#####: 637: *(rp + 2) = save;
-: 638: }
-: 639: }
-: 640:
#####: 641: else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
-: 642: {
-: 643: png_bytep rp;
-: 644: png_uint_32 i;
-: 645:
#####: 646: for (i = 0, rp = row; i < row_width; i++, rp += 4)
-: 647: {
#####: 648: png_byte save = *rp;
#####: 649: *rp = *(rp + 2);
#####: 650: *(rp + 2) = save;
-: 651: }
-: 652: }
-: 653: }
-: 654:
-: 655:#ifdef PNG_16BIT_SUPPORTED
#####: 656: else if (row_info->bit_depth == 16)
-: 657: {
#####: 658: if (row_info->color_type == PNG_COLOR_TYPE_RGB)
-: 659: {
-: 660: png_bytep rp;
-: 661: png_uint_32 i;
-: 662:
#####: 663: for (i = 0, rp = row; i < row_width; i++, rp += 6)
-: 664: {
#####: 665: png_byte save = *rp;
#####: 666: *rp = *(rp + 4);
#####: 667: *(rp + 4) = save;
#####: 668: save = *(rp + 1);
#####: 669: *(rp + 1) = *(rp + 5);
#####: 670: *(rp + 5) = save;
-: 671: }
-: 672: }
-: 673:
#####: 674: else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
-: 675: {
-: 676: png_bytep rp;
-: 677: png_uint_32 i;
-: 678:
#####: 679: for (i = 0, rp = row; i < row_width; i++, rp += 8)
-: 680: {
#####: 681: png_byte save = *rp;
#####: 682: *rp = *(rp + 4);
#####: 683: *(rp + 4) = save;
#####: 684: save = *(rp + 1);
#####: 685: *(rp + 1) = *(rp + 5);
#####: 686: *(rp + 5) = save;
-: 687: }
-: 688: }
-: 689: }
-: 690:#endif
-: 691: }
#####: 692:}
-: 693:#endif /* READ_BGR || WRITE_BGR */
-: 694:
-: 695:#if defined(PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED) || \
-: 696: defined(PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED)
-: 697:/* Added at libpng-1.5.10 */
-: 698:void /* PRIVATE */
#####: 699:png_do_check_palette_indexes(png_structrp png_ptr, png_row_infop row_info)
-: 700:{
#####: 701: if (png_ptr->num_palette < (1 << row_info->bit_depth) &&
#####: 702: png_ptr->num_palette > 0) /* num_palette can be 0 in MNG files */
-: 703: {
-: 704: /* Calculations moved outside switch in an attempt to stop different
-: 705: * compiler warnings. 'padding' is in *bits* within the last byte, it is
-: 706: * an 'int' because pixel_depth becomes an 'int' in the expression below,
-: 707: * and this calculation is used because it avoids warnings that other
-: 708: * forms produced on either GCC or MSVC.
-: 709: */
#####: 710: int padding = PNG_PADBITS(row_info->pixel_depth, row_info->width);
#####: 711: png_bytep rp = png_ptr->row_buf + row_info->rowbytes - 1;
-: 712:
#####: 713: switch (row_info->bit_depth)
-: 714: {
-: 715: case 1:
-: 716: {
-: 717: /* in this case, all bytes must be 0 so we don't need
-: 718: * to unpack the pixels except for the rightmost one.
-: 719: */
#####: 720: for (; rp > png_ptr->row_buf; rp--)
-: 721: {
#####: 722: if ((*rp >> padding) != 0)
#####: 723: png_ptr->num_palette_max = 1;
#####: 724: padding = 0;
-: 725: }
-: 726:
#####: 727: break;
-: 728: }
-: 729:
-: 730: case 2:
-: 731: {
#####: 732: for (; rp > png_ptr->row_buf; rp--)
-: 733: {
#####: 734: int i = ((*rp >> padding) & 0x03);
-: 735:
#####: 736: if (i > png_ptr->num_palette_max)
#####: 737: png_ptr->num_palette_max = i;
-: 738:
#####: 739: i = (((*rp >> padding) >> 2) & 0x03);
-: 740:
#####: 741: if (i > png_ptr->num_palette_max)
#####: 742: png_ptr->num_palette_max = i;
-: 743:
#####: 744: i = (((*rp >> padding) >> 4) & 0x03);
-: 745:
#####: 746: if (i > png_ptr->num_palette_max)
#####: 747: png_ptr->num_palette_max = i;
-: 748:
#####: 749: i = (((*rp >> padding) >> 6) & 0x03);
-: 750:
#####: 751: if (i > png_ptr->num_palette_max)
#####: 752: png_ptr->num_palette_max = i;
-: 753:
#####: 754: padding = 0;
-: 755: }
-: 756:
#####: 757: break;
-: 758: }
-: 759:
-: 760: case 4:
-: 761: {
#####: 762: for (; rp > png_ptr->row_buf; rp--)
-: 763: {
#####: 764: int i = ((*rp >> padding) & 0x0f);
-: 765:
#####: 766: if (i > png_ptr->num_palette_max)
#####: 767: png_ptr->num_palette_max = i;
-: 768:
#####: 769: i = (((*rp >> padding) >> 4) & 0x0f);
-: 770:
#####: 771: if (i > png_ptr->num_palette_max)
#####: 772: png_ptr->num_palette_max = i;
-: 773:
#####: 774: padding = 0;
-: 775: }
-: 776:
#####: 777: break;
-: 778: }
-: 779:
-: 780: case 8:
-: 781: {
#####: 782: for (; rp > png_ptr->row_buf; rp--)
-: 783: {
#####: 784: if (*rp > png_ptr->num_palette_max)
#####: 785: png_ptr->num_palette_max = (int) *rp;
-: 786: }
-: 787:
#####: 788: break;
-: 789: }
-: 790:
-: 791: default:
#####: 792: break;
-: 793: }
-: 794: }
#####: 795:}
-: 796:#endif /* CHECK_FOR_INVALID_INDEX */
-: 797:
-: 798:#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
-: 799: defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-: 800:#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
-: 801:void PNGAPI
#####: 802:png_set_user_transform_info(png_structrp png_ptr, png_voidp
-: 803: user_transform_ptr, int user_transform_depth, int user_transform_channels)
-: 804:{
-: 805: png_debug(1, "in png_set_user_transform_info");
-: 806:
#####: 807: if (png_ptr == NULL)
#####: 808: return;
-: 809:
-: 810:#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
#####: 811: if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0 &&
#####: 812: (png_ptr->flags & PNG_FLAG_ROW_INIT) != 0)
-: 813: {
#####: 814: png_app_error(png_ptr,
-: 815: "info change after png_start_read_image or png_read_update_info");
#####: 816: return;
-: 817: }
-: 818:#endif
-: 819:
#####: 820: png_ptr->user_transform_ptr = user_transform_ptr;
#####: 821: png_ptr->user_transform_depth = (png_byte)user_transform_depth;
#####: 822: png_ptr->user_transform_channels = (png_byte)user_transform_channels;
-: 823:}
-: 824:#endif
-: 825:
-: 826:/* This function returns a pointer to the user_transform_ptr associated with
-: 827: * the user transform functions. The application should free any memory
-: 828: * associated with this pointer before png_write_destroy and png_read_destroy
-: 829: * are called.
-: 830: */
-: 831:#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
-: 832:png_voidp PNGAPI
#####: 833:png_get_user_transform_ptr(png_const_structrp png_ptr)
-: 834:{
#####: 835: if (png_ptr == NULL)
#####: 836: return (NULL);
-: 837:
#####: 838: return png_ptr->user_transform_ptr;
-: 839:}
-: 840:#endif
-: 841:
-: 842:#ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED
-: 843:png_uint_32 PNGAPI
#####: 844:png_get_current_row_number(png_const_structrp png_ptr)
-: 845:{
-: 846: /* See the comments in png.h - this is the sub-image row when reading an
-: 847: * interlaced image.
-: 848: */
#####: 849: if (png_ptr != NULL)
#####: 850: return png_ptr->row_number;
-: 851:
#####: 852: return PNG_UINT_32_MAX; /* help the app not to fail silently */
-: 853:}
-: 854:
-: 855:png_byte PNGAPI
#####: 856:png_get_current_pass_number(png_const_structrp png_ptr)
-: 857:{
#####: 858: if (png_ptr != NULL)
#####: 859: return png_ptr->pass;
#####: 860: return 8; /* invalid */
-: 861:}
-: 862:#endif /* USER_TRANSFORM_INFO */
-: 863:#endif /* READ_USER_TRANSFORM || WRITE_USER_TRANSFORM */
-: 864:#endif /* READ || WRITE */