summaryrefslogtreecommitdiffstats
path: root/libpng/pngset.c
blob: 7878f370892f6449c464fce9aa6493844b186d5a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
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

/* pngset.c - storage of image information into info struct
 *
 * libpng 1.2.1 - December 12, 2001
 * For conditions of distribution and use, see copyright notice in png.h
 * Copyright (c) 1998-2001 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
 *
 * The functions here are used during reads to store data from the file
 * into the info struct, and during writes to store application data
 * into the info struct for writing into the file.  This abstracts the
 * info struct and allows us to change the structure in the future.
 */

#define PNG_INTERNAL
#include "png.h"

#if defined(PNG_bKGD_SUPPORTED)
void PNGAPI
png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
{
   png_debug1(1, "in %s storage function\n", "bKGD");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   png_memcpy(&(info_ptr->background), background, sizeof(png_color_16));
   info_ptr->valid |= PNG_INFO_bKGD;
}
#endif

#if defined(PNG_cHRM_SUPPORTED)
#ifdef PNG_FLOATING_POINT_SUPPORTED
void PNGAPI
png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
   double white_x, double white_y, double red_x, double red_y,
   double green_x, double green_y, double blue_x, double blue_y)
{
   png_debug1(1, "in %s storage function\n", "cHRM");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   info_ptr->x_white = (float)white_x;
   info_ptr->y_white = (float)white_y;
   info_ptr->x_red   = (float)red_x;
   info_ptr->y_red   = (float)red_y;
   info_ptr->x_green = (float)green_x;
   info_ptr->y_green = (float)green_y;
   info_ptr->x_blue  = (float)blue_x;
   info_ptr->y_blue  = (float)blue_y;
#ifdef PNG_FIXED_POINT_SUPPORTED
   info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
   info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
   info_ptr->int_x_red   = (png_fixed_point)(red_x*100000.+0.5);
   info_ptr->int_y_red   = (png_fixed_point)(red_y*100000.+0.5);
   info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
   info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
   info_ptr->int_x_blue  = (png_fixed_point)(blue_x*100000.+0.5);
   info_ptr->int_y_blue  = (png_fixed_point)(blue_y*100000.+0.5);
#endif
   info_ptr->valid |= PNG_INFO_cHRM;
}
#endif
#ifdef PNG_FIXED_POINT_SUPPORTED
void PNGAPI
png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
   png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
   png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
   png_fixed_point blue_x, png_fixed_point blue_y)
{
   png_debug1(1, "in %s storage function\n", "cHRM");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   info_ptr->int_x_white = white_x;
   info_ptr->int_y_white = white_y;
   info_ptr->int_x_red   = red_x;
   info_ptr->int_y_red   = red_y;
   info_ptr->int_x_green = green_x;
   info_ptr->int_y_green = green_y;
   info_ptr->int_x_blue  = blue_x;
   info_ptr->int_y_blue  = blue_y;
#ifdef PNG_FLOATING_POINT_SUPPORTED
   info_ptr->x_white = (float)(white_x/100000.);
   info_ptr->y_white = (float)(white_y/100000.);
   info_ptr->x_red   = (float)(red_x/100000.);
   info_ptr->y_red   = (float)(red_y/100000.);
   info_ptr->x_green = (float)(green_x/100000.);
   info_ptr->y_green = (float)(green_y/100000.);
   info_ptr->x_blue  = (float)(blue_x/100000.);
   info_ptr->y_blue  = (float)(blue_y/100000.);
#endif
   info_ptr->valid |= PNG_INFO_cHRM;
}
#endif
#endif

#if defined(PNG_gAMA_SUPPORTED)
#ifdef PNG_FLOATING_POINT_SUPPORTED
void PNGAPI
png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
{
   png_debug1(1, "in %s storage function\n", "gAMA");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   info_ptr->gamma = (float)file_gamma;
#ifdef PNG_FIXED_POINT_SUPPORTED
   info_ptr->int_gamma = (int)(file_gamma*100000.+.5);
#endif
   info_ptr->valid |= PNG_INFO_gAMA;
   if(file_gamma == 0.0)
      png_warning(png_ptr, "Setting gamma=0");
}
#endif
void PNGAPI
png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
   int_gamma)
{
   png_debug1(1, "in %s storage function\n", "gAMA");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

#ifdef PNG_FLOATING_POINT_SUPPORTED
   info_ptr->gamma = (float)(int_gamma/100000.);
#endif
#ifdef PNG_FIXED_POINT_SUPPORTED
   info_ptr->int_gamma = int_gamma;
#endif
   info_ptr->valid |= PNG_INFO_gAMA;
   if(int_gamma == 0)
      png_warning(png_ptr, "Setting gamma=0");
}
#endif

#if defined(PNG_hIST_SUPPORTED)
void PNGAPI
png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
{
   int	i;

   png_debug1(1, "in %s storage function\n", "hIST");
   if (png_ptr == NULL || info_ptr == NULL)
      return;
   if (info_ptr->num_palette == 0)
   {
       png_warning(png_ptr,
          "Palette size 0, hIST allocation skipped.");
       return;
   }

#ifdef PNG_FREE_ME_SUPPORTED
   png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
#endif
   /* Changed from info->num_palette to 256 in version 1.2.1 */
   png_ptr->hist = (png_uint_16p)png_malloc(png_ptr,
      (png_uint_32)(256 * sizeof (png_uint_16)));

   for (i = 0; i < info_ptr->num_palette; i++)
       png_ptr->hist[i] = hist[i];
   info_ptr->hist = png_ptr->hist;
   info_ptr->valid |= PNG_INFO_hIST;

#ifdef PNG_FREE_ME_SUPPORTED
   info_ptr->free_me |= PNG_FREE_HIST;
#else
   png_ptr->flags |= PNG_FLAG_FREE_HIST;
#endif
}
#endif

void PNGAPI
png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
   png_uint_32 width, png_uint_32 height, int bit_depth,
   int color_type, int interlace_type, int compression_type,
   int filter_type)
{
   int rowbytes_per_pixel;
   png_debug1(1, "in %s storage function\n", "IHDR");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   /* check for width and height valid values */
   if (width == 0 || height == 0)
      png_error(png_ptr, "Image width or height is zero in IHDR");
   if (width > PNG_MAX_UINT || height > PNG_MAX_UINT)
      png_error(png_ptr, "Invalid image size in IHDR");

   /* check other values */
   if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
      bit_depth != 8 && bit_depth != 16)
      png_error(png_ptr, "Invalid bit depth in IHDR");

   if (color_type < 0 || color_type == 1 ||
      color_type == 5 || color_type > 6)
      png_error(png_ptr, "Invalid color type in IHDR");

   if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) ||
       ((color_type == PNG_COLOR_TYPE_RGB ||
         color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
         color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8))
      png_error(png_ptr, "Invalid color type/bit depth combination in IHDR");

   if (interlace_type >= PNG_INTERLACE_LAST)
      png_error(png_ptr, "Unknown interlace method in IHDR");

   if (compression_type != PNG_COMPRESSION_TYPE_BASE)
      png_error(png_ptr, "Unknown compression method in IHDR");

#if defined(PNG_MNG_FEATURES_SUPPORTED)
   /* Accept filter_method 64 (intrapixel differencing) only if
    * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
    * 2. Libpng did not read a PNG signature (this filter_method is only
    *    used in PNG datastreams that are embedded in MNG datastreams) and
    * 3. The application called png_permit_mng_features with a mask that
    *    included PNG_FLAG_MNG_FILTER_64 and
    * 4. The filter_method is 64 and
    * 5. The color_type is RGB or RGBA
    */
   if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted)
      png_warning(png_ptr,"MNG features are not allowed in a PNG datastream\n");
   if(filter_type != PNG_FILTER_TYPE_BASE)
   {
     if(!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
        (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
        ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
        (color_type == PNG_COLOR_TYPE_RGB || 
         color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
        png_error(png_ptr, "Unknown filter method in IHDR");
     if(png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)
        png_warning(png_ptr, "Invalid filter method in IHDR");
   }
#else
   if(filter_type != PNG_FILTER_TYPE_BASE)
      png_error(png_ptr, "Unknown filter method in IHDR");
#endif

   info_ptr->width = width;
   info_ptr->height = height;
   info_ptr->bit_depth = (png_byte)bit_depth;
   info_ptr->color_type =(png_byte) color_type;
   info_ptr->compression_type = (png_byte)compression_type;
   info_ptr->filter_type = (png_byte)filter_type;
   info_ptr->interlace_type = (png_byte)interlace_type;
   if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
      info_ptr->channels = 1;
   else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
      info_ptr->channels = 3;
   else
      info_ptr->channels = 1;
   if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
      info_ptr->channels++;
   info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);

   /* check for overflow */
   rowbytes_per_pixel = (info_ptr->pixel_depth + 7) >> 3;
   if (( width > PNG_MAX_UINT/rowbytes_per_pixel))
   {
      png_warning(png_ptr,
         "Width too large to process image data; rowbytes will overflow.");
      info_ptr->rowbytes = (png_size_t)0;
   }
   else
      info_ptr->rowbytes = (info_ptr->width * info_ptr->pixel_depth + 7) >> 3;
}

#if defined(PNG_oFFs_SUPPORTED)
void PNGAPI
png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
   png_int_32 offset_x, png_int_32 offset_y, int unit_type)
{
   png_debug1(1, "in %s storage function\n", "oFFs");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   info_ptr->x_offset = offset_x;
   info_ptr->y_offset = offset_y;
   info_ptr->offset_unit_type = (png_byte)unit_type;
   info_ptr->valid |= PNG_INFO_oFFs;
}
#endif

#if defined(PNG_pCAL_SUPPORTED)
void PNGAPI
png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
   png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
   png_charp units, png_charpp params)
{
   png_uint_32 length;
   int i;

   png_debug1(1, "in %s storage function\n", "pCAL");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   length = png_strlen(purpose) + 1;
   png_debug1(3, "allocating purpose for info (%lu bytes)\n", length);
   info_ptr->pcal_purpose = (png_charp)png_malloc(png_ptr, length);
   png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);

   png_debug(3, "storing X0, X1, type, and nparams in info\n");
   info_ptr->pcal_X0 = X0;
   info_ptr->pcal_X1 = X1;
   info_ptr->pcal_type = (png_byte)type;
   info_ptr->pcal_nparams = (png_byte)nparams;

   length = png_strlen(units) + 1;
   png_debug1(3, "allocating units for info (%lu bytes)\n", length);
   info_ptr->pcal_units = (png_charp)png_malloc(png_ptr, length);
   png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);

   info_ptr->pcal_params = (png_charpp)png_malloc(png_ptr,
      (png_uint_32)((nparams + 1) * sizeof(png_charp)));

   info_ptr->pcal_params[nparams] = NULL;

   for (i = 0; i < nparams; i++)
   {
      length = png_strlen(params[i]) + 1;
      png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i, length);
      info_ptr->pcal_params[i] = (png_charp)png_malloc(png_ptr, length);
      png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
   }

   info_ptr->valid |= PNG_INFO_pCAL;
#ifdef PNG_FREE_ME_SUPPORTED
   info_ptr->free_me |= PNG_FREE_PCAL;
#endif
}
#endif

#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
#ifdef PNG_FLOATING_POINT_SUPPORTED
void PNGAPI
png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
             int unit, double width, double height)
{
   png_debug1(1, "in %s storage function\n", "sCAL");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   info_ptr->scal_unit = (png_byte)unit;
   info_ptr->scal_pixel_width = width;
   info_ptr->scal_pixel_height = height;

   info_ptr->valid |= PNG_INFO_sCAL;
}
#else
#ifdef PNG_FIXED_POINT_SUPPORTED
void PNGAPI
png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
             int unit, png_charp swidth, png_charp sheight)
{
   png_uint_32 length;

   png_debug1(1, "in %s storage function\n", "sCAL");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   info_ptr->scal_unit = (png_byte)unit;

   length = png_strlen(swidth) + 1;
   png_debug1(3, "allocating unit for info (%d bytes)\n", length);
   info_ptr->scal_s_width = (png_charp)png_malloc(png_ptr, length);
   png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);

   length = png_strlen(sheight) + 1;
   png_debug1(3, "allocating unit for info (%d bytes)\n", length);
   info_ptr->scal_s_height = (png_charp)png_malloc(png_ptr, length);
   png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);

   info_ptr->valid |= PNG_INFO_sCAL;
#ifdef PNG_FREE_ME_SUPPORTED
   info_ptr->free_me |= PNG_FREE_SCAL;
#endif
}
#endif
#endif
#endif

#if defined(PNG_pHYs_SUPPORTED)
void PNGAPI
png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
   png_uint_32 res_x, png_uint_32 res_y, int unit_type)
{
   png_debug1(1, "in %s storage function\n", "pHYs");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   info_ptr->x_pixels_per_unit = res_x;
   info_ptr->y_pixels_per_unit = res_y;
   info_ptr->phys_unit_type = (png_byte)unit_type;
   info_ptr->valid |= PNG_INFO_pHYs;
}
#endif

void PNGAPI
png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
   png_colorp palette, int num_palette)
{

   png_debug1(1, "in %s storage function\n", "PLTE");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   /*
    * It may not actually be necessary to set png_ptr->palette here;
    * we do it for backward compatibility with the way the png_handle_tRNS
    * function used to do the allocation.
    */
#ifdef PNG_FREE_ME_SUPPORTED
   png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
#endif
   /* Changed in libpng-1.2.1 to allocate 256 instead of num_palette entries,
      in case of an invalid PNG file that has too-large sample values. */
   png_ptr->palette = (png_colorp)png_zalloc(png_ptr, (uInt)256,
      sizeof (png_color));
   png_memcpy(png_ptr->palette, palette, num_palette * sizeof (png_color));
   info_ptr->palette = png_ptr->palette;
   info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;

#ifdef PNG_FREE_ME_SUPPORTED
   info_ptr->free_me |= PNG_FREE_PLTE;
#else
   png_ptr->flags |= PNG_FLAG_FREE_PLTE;
#endif

   info_ptr->valid |= PNG_INFO_PLTE;
}

#if defined(PNG_sBIT_SUPPORTED)
void PNGAPI
png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
   png_color_8p sig_bit)
{
   png_debug1(1, "in %s storage function\n", "sBIT");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   png_memcpy(&(info_ptr->sig_bit), sig_bit, sizeof (png_color_8));
   info_ptr->valid |= PNG_INFO_sBIT;
}
#endif

#if defined(PNG_sRGB_SUPPORTED)
void PNGAPI
png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
{
   png_debug1(1, "in %s storage function\n", "sRGB");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   info_ptr->srgb_intent = (png_byte)intent;
   info_ptr->valid |= PNG_INFO_sRGB;
}

void PNGAPI
png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
   int intent)
{
#if defined(PNG_gAMA_SUPPORTED)
#ifdef PNG_FLOATING_POINT_SUPPORTED
   float file_gamma;
#endif
#ifdef PNG_FIXED_POINT_SUPPORTED
   png_fixed_point int_file_gamma;
#endif
#endif
#if defined(PNG_cHRM_SUPPORTED)
#ifdef PNG_FLOATING_POINT_SUPPORTED
   float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
#endif
#ifdef PNG_FIXED_POINT_SUPPORTED
   png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
      int_green_y, int_blue_x, int_blue_y;
#endif
#endif
   png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   png_set_sRGB(png_ptr, info_ptr, intent);

#if defined(PNG_gAMA_SUPPORTED)
#ifdef PNG_FLOATING_POINT_SUPPORTED
   file_gamma = (float).45455;
   png_set_gAMA(png_ptr, info_ptr, file_gamma);
#endif
#ifdef PNG_FIXED_POINT_SUPPORTED
   int_file_gamma = 45455L;
   png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
#endif
#endif

#if defined(PNG_cHRM_SUPPORTED)
#ifdef PNG_FIXED_POINT_SUPPORTED
   int_white_x = 31270L;
   int_white_y = 32900L;
   int_red_x   = 64000L;
   int_red_y   = 33000L;
   int_green_x = 30000L;
   int_green_y = 60000L;
   int_blue_x  = 15000L;
   int_blue_y  =  6000L;

   png_set_cHRM_fixed(png_ptr, info_ptr,
      int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, int_green_y,
      int_blue_x, int_blue_y);
#endif
#ifdef PNG_FLOATING_POINT_SUPPORTED
   white_x = (float).3127;
   white_y = (float).3290;
   red_x   = (float).64;
   red_y   = (float).33;
   green_x = (float).30;
   green_y = (float).60;
   blue_x  = (float).15;
   blue_y  = (float).06;

   png_set_cHRM(png_ptr, info_ptr,
      white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
#endif
#endif
}
#endif


#if defined(PNG_iCCP_SUPPORTED)
void PNGAPI
png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
             png_charp name, int compression_type,
             png_charp profile, png_uint_32 proflen)
{
   png_charp new_iccp_name;
   png_charp new_iccp_profile;

   png_debug1(1, "in %s storage function\n", "iCCP");
   if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
      return;

   new_iccp_name = (png_charp)png_malloc(png_ptr, png_strlen(name)+1);
   png_strcpy(new_iccp_name, name);
   new_iccp_profile = (png_charp)png_malloc(png_ptr, proflen);
   png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);

   png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);

   info_ptr->iccp_proflen = proflen;
   info_ptr->iccp_name = new_iccp_name;
   info_ptr->iccp_profile = new_iccp_profile;
   /* Compression is always zero but is here so the API and info structure
    * does not have to change if we introduce multiple compression types */
   info_ptr->iccp_compression = (png_byte)compression_type;
#ifdef PNG_FREE_ME_SUPPORTED
   info_ptr->free_me |= PNG_FREE_ICCP;
#endif
   info_ptr->valid |= PNG_INFO_iCCP;
}
#endif

#if defined(PNG_TEXT_SUPPORTED)
void PNGAPI
png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
   int num_text)
{
   int i;

   png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ?
      "text" : (png_const_charp)png_ptr->chunk_name));

   if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
      return;

   /* Make sure we have enough space in the "text" array in info_struct
    * to hold all of the incoming text_ptr objects.
    */
   if (info_ptr->num_text + num_text > info_ptr->max_text)
   {
      if (info_ptr->text != NULL)
      {
         png_textp old_text;
         int old_max;

         old_max = info_ptr->max_text;
         info_ptr->max_text = info_ptr->num_text + num_text + 8;
         old_text = info_ptr->text;
         info_ptr->text = (png_textp)png_malloc(png_ptr,
            (png_uint_32)(info_ptr->max_text * sizeof (png_text)));
         png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
            sizeof(png_text)));
         png_free(png_ptr, old_text);
      }
      else
      {
         info_ptr->max_text = num_text + 8;
         info_ptr->num_text = 0;
         info_ptr->text = (png_textp)png_malloc(png_ptr,
            (png_uint_32)(info_ptr->max_text * sizeof (png_text)));
#ifdef PNG_FREE_ME_SUPPORTED
         info_ptr->free_me |= PNG_FREE_TEXT;
#endif
      }
      png_debug1(3, "allocated %d entries for info_ptr->text\n",
         info_ptr->max_text);
   }
   for (i = 0; i < num_text; i++)
   {
      png_size_t text_length,key_len;
      png_size_t lang_len,lang_key_len;
      png_textp textp = &(info_ptr->text[info_ptr->num_text]);

      if (text_ptr[i].key == NULL)
          continue;

      key_len = png_strlen(text_ptr[i].key);

      if(text_ptr[i].compression <= 0)
      {
        lang_len = 0;
        lang_key_len = 0;
      }
      else
#ifdef PNG_iTXt_SUPPORTED
      {
        /* set iTXt data */
        if (text_ptr[i].key != NULL)
          lang_len = png_strlen(text_ptr[i].lang);
        else
          lang_len = 0;
        if (text_ptr[i].lang_key != NULL)
          lang_key_len = png_strlen(text_ptr[i].lang_key);
        else
          lang_key_len = 0;
      }
#else
      {
        png_warning(png_ptr, "iTXt chunk not supported.");
        continue;
      }
#endif

      if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
      {
         text_length = 0;
#ifdef PNG_iTXt_SUPPORTED
         if(text_ptr[i].compression > 0)
            textp->compression = PNG_ITXT_COMPRESSION_NONE;
         else
#endif
            textp->compression = PNG_TEXT_COMPRESSION_NONE;
      }
      else
      {
         text_length = png_strlen(text_ptr[i].text);
         textp->compression = text_ptr[i].compression;
      }

      textp->key = (png_charp)png_malloc(png_ptr,
         (png_uint_32)(key_len + text_length + lang_len + lang_key_len + 4));
      png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n",
         (png_uint_32)(key_len + lang_len + lang_key_len + text_length + 4),
         (int)textp->key);

      png_memcpy(textp->key, text_ptr[i].key,
         (png_size_t)(key_len));
      *(textp->key+key_len) = '\0';
#ifdef PNG_iTXt_SUPPORTED
      if (text_ptr[i].compression > 0)
      {
         textp->lang=textp->key + key_len + 1;
         png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
         *(textp->lang+lang_len) = '\0';
         textp->lang_key=textp->lang + lang_len + 1;
         png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
         *(textp->lang_key+lang_key_len) = '\0';
         textp->text=textp->lang_key + lang_key_len + 1;
      }
      else
#endif
      {
#ifdef PNG_iTXt_SUPPORTED
         textp->lang=NULL;
         textp->lang_key=NULL;
#endif
         textp->text=textp->key + key_len + 1;
      }
      if(text_length)
         png_memcpy(textp->text, text_ptr[i].text,
            (png_size_t)(text_length));
      *(textp->text+text_length) = '\0';

#ifdef PNG_iTXt_SUPPORTED
      if(textp->compression > 0)
      {
         textp->text_length = 0;
         textp->itxt_length = text_length;
      }
      else
#endif
      {
         textp->text_length = text_length;
#ifdef PNG_iTXt_SUPPORTED
         textp->itxt_length = 0;
#endif
      }
      info_ptr->text[info_ptr->num_text]= *textp;
      info_ptr->num_text++;
      png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
   }
}
#endif

#if defined(PNG_tIME_SUPPORTED)
void PNGAPI
png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
{
   png_debug1(1, "in %s storage function\n", "tIME");
   if (png_ptr == NULL || info_ptr == NULL ||
       (png_ptr->mode & PNG_WROTE_tIME))
      return;

   png_memcpy(&(info_ptr->mod_time), mod_time, sizeof (png_time));
   info_ptr->valid |= PNG_INFO_tIME;
}
#endif

#if defined(PNG_tRNS_SUPPORTED)
void PNGAPI
png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
   png_bytep trans, int num_trans, png_color_16p trans_values)
{
   png_debug1(1, "in %s storage function\n", "tRNS");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   if (trans != NULL)
   {
       /*
	* It may not actually be necessary to set png_ptr->trans here;
	* we do it for backward compatibility with the way the png_handle_tRNS
	* function used to do the allocation.
	*/
#ifdef PNG_FREE_ME_SUPPORTED
       png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
#endif
       /* Changed from num_trans to 256 in version 1.2.1 */
       png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
           (png_uint_32)256);
       png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
#ifdef PNG_FREE_ME_SUPPORTED
       info_ptr->free_me |= PNG_FREE_TRNS;
#else
       png_ptr->flags |= PNG_FLAG_FREE_TRNS;
#endif
   }

   if (trans_values != NULL)
   {
      png_memcpy(&(info_ptr->trans_values), trans_values,
         sizeof(png_color_16));
      if (num_trans == 0)
        num_trans = 1;
   }
   info_ptr->num_trans = (png_uint_16)num_trans;
   info_ptr->valid |= PNG_INFO_tRNS;
}
#endif

#if defined(PNG_sPLT_SUPPORTED)
void PNGAPI
png_set_sPLT(png_structp png_ptr,
             png_infop info_ptr, png_sPLT_tp entries, int nentries)
{
    png_sPLT_tp np;
    int i;

    np = (png_sPLT_tp)png_malloc(png_ptr,
        (info_ptr->splt_palettes_num + nentries) * sizeof(png_sPLT_t));

    png_memcpy(np, info_ptr->splt_palettes,
           info_ptr->splt_palettes_num * sizeof(png_sPLT_t));
    png_free(png_ptr, info_ptr->splt_palettes);
    info_ptr->splt_palettes=NULL;

    for (i = 0; i < nentries; i++)
    {
        png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
        png_sPLT_tp from = entries + i;

        to->name = (png_charp)png_malloc(png_ptr,
            png_strlen(from->name) + 1);
        png_strcpy(to->name, from->name);
        to->entries = (png_sPLT_entryp)png_malloc(png_ptr,
            from->nentries * sizeof(png_sPLT_t));
        png_memcpy(to->entries, from->entries,
            from->nentries * sizeof(png_sPLT_t));
        to->nentries = from->nentries;
        to->depth = from->depth;
    }

    info_ptr->splt_palettes = np;
    info_ptr->splt_palettes_num += nentries;
    info_ptr->valid |= PNG_INFO_sPLT;
#ifdef PNG_FREE_ME_SUPPORTED
    info_ptr->free_me |= PNG_FREE_SPLT;
#endif
}
#endif /* PNG_sPLT_SUPPORTED */

#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
void PNGAPI
png_set_unknown_chunks(png_structp png_ptr,
   png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
{
    png_unknown_chunkp np;
    int i;

    if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
        return;

    np = (png_unknown_chunkp)png_malloc(png_ptr,
        (info_ptr->unknown_chunks_num + num_unknowns) *
        sizeof(png_unknown_chunk));

    png_memcpy(np, info_ptr->unknown_chunks,
           info_ptr->unknown_chunks_num * sizeof(png_unknown_chunk));
    png_free(png_ptr, info_ptr->unknown_chunks);
    info_ptr->unknown_chunks=NULL;

    for (i = 0; i < num_unknowns; i++)
    {
        png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
        png_unknown_chunkp from = unknowns + i;

        png_strcpy((png_charp)to->name, (png_charp)from->name);
        to->data = (png_bytep)png_malloc(png_ptr, from->size);
        png_memcpy(to->data, from->data, from->size);
        to->size = from->size;

        /* note our location in the read or write sequence */
        to->location = (png_byte)(png_ptr->mode & 0xff);
    }

    info_ptr->unknown_chunks = np;
    info_ptr->unknown_chunks_num += num_unknowns;
#ifdef PNG_FREE_ME_SUPPORTED
    info_ptr->free_me |= PNG_FREE_UNKN;
#endif
}
void PNGAPI
png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
   int chunk, int location)
{
   if(png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
         (int)info_ptr->unknown_chunks_num)
      info_ptr->unknown_chunks[chunk].location = (png_byte)location;
}
#endif

#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
    defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
void PNGAPI
png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
{
   /* This function is deprecated in favor of png_permit_mng_features()
      and will be removed from libpng-2.0.0 */
   png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n");
   if (png_ptr == NULL)
      return;
   png_ptr->mng_features_permitted = (png_byte)
     ((png_ptr->mng_features_permitted & (~(PNG_FLAG_MNG_EMPTY_PLTE))) |
     ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
}
#endif

#if defined(PNG_MNG_FEATURES_SUPPORTED)
png_uint_32 PNGAPI
png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
{
   png_debug(1, "in png_permit_mng_features\n");
   if (png_ptr == NULL)
      return (png_uint_32)0;
   png_ptr->mng_features_permitted =
     (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
   return (png_uint_32)png_ptr->mng_features_permitted;
}
#endif

#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
void PNGAPI
png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
   chunk_list, int num_chunks)
{
    png_bytep new_list, p;
    int i, old_num_chunks;
    if (num_chunks == 0)
    {
      if(keep == HANDLE_CHUNK_ALWAYS || keep == HANDLE_CHUNK_IF_SAFE)
        png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
      else
        png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;

      if(keep == HANDLE_CHUNK_ALWAYS)
        png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
      else
        png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
      return;
    }
    if (chunk_list == NULL)
      return;
    old_num_chunks=png_ptr->num_chunk_list;
    new_list=(png_bytep)png_malloc(png_ptr,
       (png_uint_32)(5*(num_chunks+old_num_chunks)));
    if(png_ptr->chunk_list != NULL)
    {
       png_memcpy(new_list, png_ptr->chunk_list,
          (png_size_t)(5*old_num_chunks));
       png_free(png_ptr, png_ptr->chunk_list);
       png_ptr->chunk_list=NULL;
    }
    png_memcpy(new_list+5*old_num_chunks, chunk_list,
       (png_size_t)(5*num_chunks));
    for (p=new_list+5*old_num_chunks+4, i=0; i<num_chunks; i++, p+=5)
       *p=(png_byte)keep;
    png_ptr->num_chunk_list=old_num_chunks+num_chunks;
    png_ptr->chunk_list=new_list;
#ifdef PNG_FREE_ME_SUPPORTED
    png_ptr->free_me |= PNG_FREE_LIST;
#endif
}
#endif

#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
void PNGAPI
png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
   png_user_chunk_ptr read_user_chunk_fn)
{
   png_debug(1, "in png_set_read_user_chunk_fn\n");
   png_ptr->read_user_chunk_fn = read_user_chunk_fn;
   png_ptr->user_chunk_ptr = user_chunk_ptr;
}
#endif

#if defined(PNG_INFO_IMAGE_SUPPORTED)
void PNGAPI
png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
{
   png_debug1(1, "in %s storage function\n", "rows");

   if (png_ptr == NULL || info_ptr == NULL)
      return;

   if(info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
      png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
   info_ptr->row_pointers = row_pointers;
   if(row_pointers)
      info_ptr->valid |= PNG_INFO_IDAT;
}
#endif

void PNGAPI
png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size)
{
    if(png_ptr->zbuf)
       png_free(png_ptr, png_ptr->zbuf);
    png_ptr->zbuf_size = (png_size_t)size;
    png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
    png_ptr->zstream.next_out = png_ptr->zbuf;
    png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
}

void PNGAPI
png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
{
   if (png_ptr && info_ptr)
      info_ptr->valid &= ~(mask);
}


#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
/* this function was added to libpng 1.2.0 and should always exist by default */
void PNGAPI
png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
{
    png_uint_32 settable_asm_flags;
    png_uint_32 settable_mmx_flags;

    settable_mmx_flags =
#ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
                         PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  |
#endif
#ifdef PNG_HAVE_ASSEMBLER_READ_INTERLACE
                         PNG_ASM_FLAG_MMX_READ_INTERLACE    |
#endif
#ifdef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
                         PNG_ASM_FLAG_MMX_READ_FILTER_SUB   |
                         PNG_ASM_FLAG_MMX_READ_FILTER_UP    |
                         PNG_ASM_FLAG_MMX_READ_FILTER_AVG   |
                         PNG_ASM_FLAG_MMX_READ_FILTER_PAETH |
#endif
                         0;

    /* could be some non-MMX ones in the future, but not currently: */
    settable_asm_flags = settable_mmx_flags;

    if (!(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_COMPILED) ||
        !(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU))
    {
        /* clear all MMX flags if MMX isn't supported */
        settable_asm_flags &= ~settable_mmx_flags;
        png_ptr->asm_flags &= ~settable_mmx_flags;
    }

    /* we're replacing the settable bits with those passed in by the user,
     * so first zero them out of the master copy, then logical-OR in the
     * allowed subset that was requested */

    png_ptr->asm_flags &= ~settable_asm_flags;			/* zero them */
    png_ptr->asm_flags |= (asm_flags & settable_asm_flags);	/* set them */
}
#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */

#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
/* this function was added to libpng 1.2.0 */
void PNGAPI
png_set_mmx_thresholds (png_structp png_ptr,
                        png_byte mmx_bitdepth_threshold,
                        png_uint_32 mmx_rowbytes_threshold)
{
    png_ptr->mmx_bitdepth_threshold = mmx_bitdepth_threshold;
    png_ptr->mmx_rowbytes_threshold = mmx_rowbytes_threshold;
}
#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */