-
Notifications
You must be signed in to change notification settings - Fork 8
/
pdfcolor.c
1612 lines (1359 loc) · 37.6 KB
/
pdfcolor.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.
Copyright (C) 2002-2015 by Jin-Hwan Cho and Shunsaku Hirata,
the dvipdfmx project team.
Copyright (C) 1998, 1999 by Mark A. Wicks <mwicks@kettering.edu>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
/* No page independence here...
*/
#include "libtexpdf.h"
static int verbose = 0;
void
texpdf_color_set_verbose (void)
{
verbose++;
}
/* This function returns PDF_COLORSPACE_TYPE_GRAY,
* PDF_COLORSPACE_TYPE_RGB, PDF_COLORSPACE_TYPE_CMYK or
* PDF_COLORSPACE_TYPE_SPOT.
*/
int
texpdf_color_type (const pdf_color *color)
{
ASSERT(color);
return -color->num_components;
}
int
texpdf_color_rgbcolor (pdf_color *color, double r, double g, double b)
{
ASSERT(color);
if (r < 0.0 || r > 1.0) {
WARN("Invalid color value specified: red=%g", r);
return -1;
}
if (g < 0.0 || g > 1.0) {
WARN("Invalid color value specified: green=%g", g);
return -1;
}
if (b < 0.0 || b > 1.0) {
WARN("Invalid color value specified: blue=%g", b);
return -1;
}
color->values[0] = r;
color->values[1] = g;
color->values[2] = b;
color->num_components = 3;
color->spot_color_name = NULL;
return 0;
}
int
texpdf_color_cmykcolor (pdf_color *color,
double c, double m, double y, double k)
{
ASSERT(color);
if (c < 0.0 || c > 1.0) {
WARN("Invalid color value specified: cyan=%g", c);
return -1;
}
if (m < 0.0 || m > 1.0) {
WARN("Invalid color value specified: magenta=%g", m);
return -1;
}
if (y < 0.0 || y > 1.0) {
WARN("Invalid color value specified: yellow=%g", y);
return -1;
}
if (k < 0.0 || k > 1.0) {
WARN("Invalid color value specified: black=%g", k);
return -1;
}
color->values[0] = c;
color->values[1] = m;
color->values[2] = y;
color->values[3] = k;
color->num_components = 4;
color->spot_color_name = NULL;
return 0;
}
int
texpdf_color_graycolor (pdf_color *color, double g)
{
ASSERT(color);
if (g < 0.0 || g > 1.0) {
WARN("Invalid color value specified: gray=%g", g);
return -1;
}
color->values[0] = g;
color->num_components = 1;
color->spot_color_name = NULL;
return 0;
}
int
pdf_color_spotcolor (pdf_color *color, char* name, double c)
{
ASSERT(color);
if (c < 0.0 || c > 1.0) {
WARN("Invalid color value specified: grade=%g", c);
return -1;
}
color->values[0] = c;
color->values[1] = 0.0; /* Dummy */
color->num_components = 2;
color->spot_color_name = name;
return 0;
}
void
texpdf_color_copycolor (pdf_color *color1, const pdf_color *color2)
{
ASSERT(color1 && color2);
memcpy(color1, color2, sizeof(pdf_color));
}
/* Brighten up a color. f == 0 means no change, f == 1 means white. */
void
texpdf_color_brighten_color (pdf_color *dst, const pdf_color *src, double f)
{
ASSERT(dst && src);
if (f == 1.0) {
texpdf_color_white(dst);
} else {
double f0, f1;
int n;
n = dst->num_components = src->num_components;
f1 = n == 4 ? 0.0 : f; /* n == 4 is CMYK, others are RGB and Gray */
f0 = 1.0-f;
while (n--)
dst->values[n] = f0 * src->values[n] + f1;
}
}
int
texpdf_color_is_white (const pdf_color *color)
{
int n;
double f;
ASSERT(color);
n = color->num_components;
switch (n) {
case 1: /* Gray */
case 3: /* RGB */
f = 1.0;
break;
case 4: /* CMYK */
f = 0.0;
break;
default:
return 0;
}
while (n--)
if (color->values[n] != f)
return 0;
return 1;
}
int
texpdf_color_to_string (const pdf_color *color, char *buffer, char mask)
{
int i, len = 0;
if (texpdf_color_type(color) == PDF_COLORSPACE_TYPE_SPOT) {
len = sprintf(buffer, " /%s %c%c %g %c%c",
color->spot_color_name,
'C' | mask, 'S' | mask,
ROUND(color->values[0], 0.001),
'S' | mask, 'C' | mask);
} else {
for (i = 0; i < color->num_components; i++) {
len += sprintf(buffer+len, " %g", ROUND(color->values[i], 0.001));
}
}
return len;
}
pdf_color current_fill = {
1,
NULL,
{0.0, 0.0, 0.0, 0.0}
};
pdf_color current_stroke = {
1,
NULL,
{0.0, 0.0, 0.0, 0.0}
};
/*
* This routine is not a real color matching.
*/
int
texpdf_color_compare (const pdf_color *color1, const pdf_color *color2)
{
int n;
n = color1->num_components;
switch (n) {
case 1: /* Gray */
case 2: /* Spot */
case 3: /* RGB */
case 4: /* CMYK */
break;
default:
return -1;
}
if (n != color2->num_components)
return -1;
while (n--)
if (color1->values[n] != color2->values[n])
return -1;
if (color1->spot_color_name && color2->spot_color_name)
return strcmp(color1->spot_color_name, color2->spot_color_name);
return 0;
}
int
texpdf_color_is_valid (const pdf_color *color)
{
int n;
n = color->num_components;
switch (n) {
case 1: /* Gray */
case 2: /* Spot */
case 3: /* RGB */
case 4: /* CMYK */
break;
default:
return 0;
}
while (n--)
if (color->values[n] < 0.0 || color->values[n] > 1.0) {
WARN("Invalid color value: %g", color->values[n]);
return 0;
}
if (texpdf_color_type(color) == PDF_COLORSPACE_TYPE_SPOT) {
if (!color->spot_color_name || color->spot_color_name[0] == '\0') {
WARN("Invalid spot color: empty name");
return 0;
}
}
return 1;
}
/* Dvipdfm special */
pdf_color default_color = {
1,
NULL,
{0.0, 0.0, 0.0, 0.0}
};
void
texpdf_color_set_default (const pdf_color *color)
{
texpdf_color_copycolor(&default_color, color);
}
#define DEV_COLOR_STACK_MAX 128
static struct {
int current;
pdf_color stroke[DEV_COLOR_STACK_MAX];
pdf_color fill[DEV_COLOR_STACK_MAX];
} color_stack = {
0,
};
void
texpdf_color_clear_stack (void)
{
if (color_stack.current > 0) {
WARN("You've mistakenly made a global color change within nested colors.");
}
while (color_stack.current--) {
free(color_stack.stroke[color_stack.current].spot_color_name);
free(color_stack.fill[color_stack.current].spot_color_name);
}
color_stack.current = 0;
texpdf_color_black(color_stack.stroke);
texpdf_color_black(color_stack.fill);
return;
}
void
texpdf_color_set (pdf_doc *p, pdf_color *sc, pdf_color *fc)
{
texpdf_color_copycolor(&color_stack.stroke[color_stack.current], sc);
texpdf_color_copycolor(&color_stack.fill[color_stack.current], fc);
texpdf_dev_reset_color(p, 0);
}
void
texpdf_color_push (pdf_doc *p, pdf_color *sc, pdf_color *fc)
{
if (color_stack.current >= DEV_COLOR_STACK_MAX-1) {
WARN("Color stack overflow. Just ignore.");
} else {
color_stack.current++;
texpdf_color_set(p, sc, fc);
}
return;
}
void
texpdf_color_pop (pdf_doc *p)
{
if (color_stack.current <= 0) {
WARN("Color stack underflow. Just ignore.");
} else {
color_stack.current--;
texpdf_dev_reset_color(p, 0);
}
return;
}
void
texpdf_color_get_current (pdf_color **sc, pdf_color **fc)
{
*sc = &color_stack.stroke[color_stack.current];
*fc = &color_stack.fill[color_stack.current];
return;
}
#if 0
/* BUG (20060330): color change does not effect on the next page.
* The problem is due to the part of grestore because it restores
* the color values in the state of gsave which are not correct
* if the color values are changed inside of a page.
*/
void
texpdf_dev_preserve_color (void)
{
if (color_stack.current > 0) {
current_stroke = color_stack.stroke[color_stack.current];
current_fill = color_stack.fill[color_stack.current];
}
}
#endif
/***************************** COLOR SPACE *****************************/
static int pdf_colorspace_defineresource (const char *ident,
int subtype,
void *cdata, pdf_obj *resource);
static int pdf_colorspace_findresource (const char *ident,
int subtype, const void *cdata);
#if 0
struct calgray_cdata
{
double white_point[3]; /* required, second component must
* be equal to 1.0
*/
double black_point[3]; /* optional, default: [0 0 0] */
double gamma; /* optional, default: 1.0 */
};
struct calrgb_cdata
{
double white_point[3]; /* required, second component must
* be equal to 1.0
*/
double black_point[3]; /* optional, default: [0 0 0] */
double gamma[3]; /* optional, default: [1 1 1] */
double matrix[9]; /* optional, default: identity
* [1 0 0 0 1 0 0 0 1]
*/
};
static void
release_calrgb (void *cdata)
{
struct calrgb_cdata *calrgb;
if (cdata) {
calrgb = (struct calrgb_cdata *) cdata;
RELEASE(calrgb);
}
}
static int
compare_calrgb (const char *ident1, const void *cdata1,
const char *ident2, const void *cdata2)
{
struct calrgb_cdata *calrgb1;
struct calrgb_cdata *calrgb2;
if (ident1 && ident2 &&
!strcmp(ident1, ident2)) {
return 0;
}
}
static void
init_calrgb (struct calrgb_cdata *calrgb)
{
ASSERT(calrgb);
calrgb->white_point[0] = 1.0;
calrgb->white_point[1] = 1.0;
calrgb->white_point[2] = 1.0;
calrgb->black_point[0] = 0.0;
calrgb->black_point[1] = 0.0;
calrgb->black_point[2] = 0.0;
calrgb->gamma[0] = 1.0;
calrgb->gamma[1] = 1.0;
calrgb->gamma[2] = 1.0;
calrgb->matrix[0] = 1.0;
calrgb->matrix[1] = 0.0;
calrgb->matrix[2] = 0.0;
calrgb->matrix[3] = 0.0;
calrgb->matrix[4] = 1.0;
calrgb->matrix[5] = 0.0;
calrgb->matrix[6] = 0.0;
calrgb->matrix[7] = 0.0;
calrgb->matrix[8] = 1.0;
}
static int
valid_calrgb (struct calrgb_cdata *calrgb)
{
if (calrgb->white_point[1] != 1.0 ||
calrgb->white_point[0] <= 0.0 ||
calrgb->white_point[2] <= 0.0)
return 0;
if (calrgb->black_point[0] < 0.0 ||
calrgb->black_point[1] < 0.0 ||
calrgb->black_point[2] < 0.0)
return 0;
if (calrgb->gamma[0] < 0.0 ||
calrgb->gamma[1] < 0.0 ||
calrgb->gamma[2] < 0.0)
return 0;
/* matrix should be invertible? */
return 1;
}
static pdf_obj *
texpdf_color_make_calrgb_resource (struct calrgb_cdata *calrgb)
{
pdf_obj *colorspace;
pdf_obj *calparams, *tmp_array;
ASSERT(calrgb);
if (!valid_calrgb(calrgb))
return NULL;
colorspace = texpdf_new_array();
calparams = texpdf_new_dict();
tmp_array = texpdf_new_array();
texpdf_add_array(tmp_array, texpdf_new_number(ROUND(calrgb->white_point[0], 0.001)));
texpdf_add_array(tmp_array, texpdf_new_number(1.0));
texpdf_add_array(tmp_array, texpdf_new_number(ROUND(calrgb->white_point[2], 0.001)));
texpdf_add_dict(calparams, texpdf_new_name("WhitePoint"), tmp_array);
if (calrgb->black_point[0] != 0.0 ||
calrgb->black_point[1] != 0.0 ||
calrgb->black_point[2] != 0.0) {
tmp_array = texpdf_new_array();
texpdf_add_array(tmp_array, texpdf_new_number(ROUND(calrgb->black_point[0], 0.001)));
texpdf_add_array(tmp_array, texpdf_new_number(ROUND(calrgb->black_point[1], 0.001)));
texpdf_add_array(tmp_array, texpdf_new_number(ROUND(calrgb->black_point[2], 0.001)));
texpdf_add_dict(calparams, texpdf_new_name("BlackPoint"), tmp_array);
}
if (calrgb->gamma[0] != 1.0 ||
calrgb->gamma[1] != 1.0 ||
calrgb->gamma[2] != 1.0) {
tmp_array = texpdf_new_array();
texpdf_add_array(tmp_array, texpdf_new_number(ROUND(calrgb->gamma[0], 0.001)));
texpdf_add_array(tmp_array, texpdf_new_number(ROUND(calrgb->gamma[1], 0.001)));
texpdf_add_array(tmp_array, texpdf_new_number(ROUND(calrgb->gamma[2], 0.001)));
texpdf_add_dict(calparams, texpdf_new_name("Gamma"), tmp_array);
}
if (calrgb->matrix[0] != 1.0 ||
calrgb->matrix[1] != 0.0 ||
calrgb->matrix[2] != 0.0 ||
calrgb->matrix[3] != 0.0 ||
calrgb->matrix[4] != 1.0 ||
calrgb->matrix[5] != 0.0 ||
calrgb->matrix[6] != 0.0 ||
calrgb->matrix[7] != 0.0 ||
calrgb->matrix[8] != 1.0) {
tmp_array = texpdf_new_array();
texpdf_add_array(tmp_array, texpdf_new_number(ROUND(calrgb->matrix[0], 0.001)));
texpdf_add_array(tmp_array, texpdf_new_number(ROUND(calrgb->matrix[1], 0.001)));
texpdf_add_array(tmp_array, texpdf_new_number(ROUND(calrgb->matrix[2], 0.001)));
texpdf_add_array(tmp_array, texpdf_new_number(ROUND(calrgb->matrix[3], 0.001)));
texpdf_add_array(tmp_array, texpdf_new_number(ROUND(calrgb->matrix[4], 0.001)));
texpdf_add_array(tmp_array, texpdf_new_number(ROUND(calrgb->matrix[5], 0.001)));
texpdf_add_array(tmp_array, texpdf_new_number(ROUND(calrgb->matrix[6], 0.001)));
texpdf_add_array(tmp_array, texpdf_new_number(ROUND(calrgb->matrix[7], 0.001)));
texpdf_add_array(tmp_array, texpdf_new_number(ROUND(calrgb->matrix[8], 0.001)));
texpdf_add_dict(calparams, texpdf_new_name("Matrix"), tmp_array);
}
texpdf_add_array(colorspace, texpdf_new_name("CalRGB"));
texpdf_add_array(colorspace, calparams);
return colorspace;
}
#endif
static unsigned char nullbytes16[16] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
static struct
{
int major;
int minor;
} icc_versions[] = {
{0, 0}, /* PDF-1.0, we don't support them */
{0, 0}, /* PDF-1.1, we don't support them */
{0, 0}, /* PDF-1.2, we don't support them */
{0x02, 0x10}, /* PDF-1.3 */
{0x02, 0x20}, /* PDF-1.4 */
{0x04, 0x00}, /* PDF-1.5 */
{0x04, 0x00}, /* PDF-1.6 */
{0x04, 0x20}, /* PDF-1.7 */
};
static int
iccp_version_supported (int major, int minor)
{
int pdf_ver;
pdf_ver = texpdf_get_version();
if (pdf_ver < 8) {
if (icc_versions[pdf_ver].major < major)
return 0;
else if (icc_versions[pdf_ver].major == major &&
icc_versions[pdf_ver].minor < minor)
return 0;
else {
return 1;
}
}
return 0;
}
typedef unsigned long iccSig;
static iccSig
str2iccSig (const void *s)
{
const char *p;
p = (const char *) s;
return (iccSig) ((p[0]<<24)|(p[1]<<16)|(p[2]<<8)|p[3]);
}
typedef struct
{
long X, Y, Z; /* s15Fixed16Numeber */
} iccXYZNumber;
typedef struct
{
long size;
iccSig CMMType;
long version;
iccSig devClass;
iccSig colorSpace;
iccSig PCS; /* Profile Connection Space */
char creationDate[12];
iccSig acsp;
iccSig platform;
char flags[4];
iccSig devMnfct;
iccSig devModel;
char devAttr[8];
long intent;
iccXYZNumber illuminant;
iccSig creator;
unsigned char ID[16]; /* MD5 checksum with Rendering intent,
* Header attrs, Profile ID fields are
* set to zeros.
*/
/* 28 bytes reserved - must be set to zeros */
} iccHeader;
#define iccNullSig 0
static void
iccp_init_iccHeader (iccHeader *icch)
{
ASSERT(icch);
icch->size = 0;
icch->CMMType = iccNullSig;
icch->version = 0xFFFFFF;
icch->devClass = iccNullSig;
icch->colorSpace = iccNullSig;
icch->PCS = iccNullSig;
memset(icch->creationDate, 0, 12);
icch->acsp = str2iccSig("ascp");
icch->platform = iccNullSig;
memset(icch->flags, 0, 4);
icch->devMnfct = iccNullSig;
icch->devModel = iccNullSig;
memset(icch->devAttr, 0, 8);
icch->intent = 0;
icch->illuminant.X = 0;
icch->illuminant.Y = 0;
icch->illuminant.Z = 0;
icch->creator = iccNullSig;
memset(icch->ID, 0, 16);
}
#define ICC_INTENT_TYPE(n) ((int) (((n) >> 16) & 0xff))
#define ICC_INTENT_PERCEPTUAL 0
#define ICC_INTENT_RELATIVE 1
#define ICC_INTENT_SATURATION 2
#define ICC_INTENT_ABSOLUTE 3
/*
* In ICC profile stream dicrionary, there is /Range whose values must
* "match the information in the profile". But where is those values in?
*
* How should I treat rendering intent?
*/
struct iccbased_cdata
{
long sig; /* 'i' 'c' 'c' 'b' */
unsigned char checksum[16]; /* 16 bytes MD5 Checksum */
int colorspace; /* input colorspace:
* RGB, Gray, CMYK, (Lab?)
*/
int alternate; /* alternate colorspace (id), unused */
};
#define check_sig(d,p,q,r,s) ((d) && (d)->sig == ((p)<<24|(q)<<16|(r)<<8|(s)))
static void
init_iccbased_cdata (struct iccbased_cdata *cdata)
{
ASSERT(cdata);
cdata->sig = ('i' << 24|'c' << 16|'c' << 8|'b');
memset(cdata->checksum, 0, 16);
cdata->colorspace = PDF_COLORSPACE_TYPE_INVALID;
cdata->alternate = -1;
return;
}
static void
release_iccbased_cdata (struct iccbased_cdata *cdata)
{
ASSERT(check_sig(cdata, 'i', 'c', 'c', 'b'));
RELEASE(cdata);
}
static int
get_num_components_iccbased (const struct iccbased_cdata *cdata)
{
int num_components = 0;
ASSERT(check_sig(cdata, 'i', 'c', 'c', 'b'));
switch (cdata->colorspace) {
case PDF_COLORSPACE_TYPE_RGB:
num_components = 3;
break;
case PDF_COLORSPACE_TYPE_CMYK:
num_components = 4;
break;
case PDF_COLORSPACE_TYPE_GRAY:
num_components = 1;
break;
case PDF_COLORSPACE_TYPE_CIELAB:
num_components = 3;
break;
}
return num_components;
}
static int
compare_iccbased (const char *ident1, const struct iccbased_cdata *cdata1,
const char *ident2, const struct iccbased_cdata *cdata2)
{
if (cdata1 && cdata2) {
ASSERT(check_sig(cdata1, 'i', 'c', 'c', 'b'));
ASSERT(check_sig(cdata2, 'i', 'c', 'c', 'b'));
if (memcmp(cdata1->checksum, nullbytes16, 16) &&
memcmp(cdata2->checksum, nullbytes16, 16)) {
return memcmp(cdata1->checksum, cdata2->checksum, 16);
}
if (cdata1->colorspace != cdata2->colorspace) {
return (cdata1->colorspace - cdata2->colorspace);
}
/* Continue if checksum unknown and colorspace is same. */
}
if (ident1 && ident2)
return strcmp(ident1, ident2);
/* No way to compare */
return -1;
}
int
iccp_check_colorspace (int colortype, const void *profile, long proflen)
{
iccSig colorspace;
const unsigned char *p;
if (!profile || proflen < 128)
return -1;
p = (const unsigned char *) profile;
colorspace = str2iccSig(p + 16);
switch (colortype) {
case PDF_COLORSPACE_TYPE_CALRGB:
case PDF_COLORSPACE_TYPE_RGB:
if (colorspace != str2iccSig("RGB ")) {
return -1;
}
break;
case PDF_COLORSPACE_TYPE_CALGRAY:
case PDF_COLORSPACE_TYPE_GRAY:
if (colorspace != str2iccSig("GRAY")) {
return -1;
}
break;
case PDF_COLORSPACE_TYPE_CMYK:
if (colorspace != str2iccSig("CMYK")) {
return -1;
}
break;
default:
return -1;
}
return 0;
}
pdf_obj *
iccp_get_rendering_intent (const void *profile, long proflen)
{
pdf_obj *ri = NULL;
const unsigned char *p;
long intent;
if (!profile || proflen < 128)
return NULL;
p = (const unsigned char *) profile;
intent = (p[64] << 24)|(p[65] << 16)|(p[66] << 8)|p[67];
switch (ICC_INTENT_TYPE(intent)) {
case ICC_INTENT_SATURATION:
ri = texpdf_new_name("Saturation");
break;
case ICC_INTENT_PERCEPTUAL:
ri = texpdf_new_name("Perceptual");
break;
case ICC_INTENT_ABSOLUTE:
ri = texpdf_new_name("AbsoluteColorimetric");
break;
case ICC_INTENT_RELATIVE:
ri = texpdf_new_name("RelativeColorimetric");
break;
default:
WARN("Invalid rendering intent type: %d", ICC_INTENT_TYPE(intent));
ri = NULL;
}
return ri;
}
#define sget_signed_long(p) ((long) ((p)[0] << 24|(p)[1] << 16|(p)[2] << 8|(p)[3]))
#define sget_signed_short(p) ((short) ((p)[0] << 8|(p)[1]))
#define get_iccSig(p) ((iccSig) ((p)[0] << 24|(p)[1] << 16|(p)[2] << 8|(p)[3]))
static int
iccp_unpack_header (iccHeader *icch,
const void *profile, long proflen, int check_size)
{
const unsigned char *p, *endptr;
if (check_size) {
if (!profile || proflen < 128 ||
proflen % 4 != 0) {
WARN("Profile size: %ld", proflen);
return -1;
}
}
p = (const unsigned char *) profile;
endptr = p + 128;
icch->size = sget_signed_long(p);
if (check_size) {
if (icch->size != proflen) {
WARN("ICC Profile size: %ld(header) != %ld", icch->size, proflen);
return -1;
}
}
p += 4;
icch->CMMType = str2iccSig(p);
p += 4;
icch->version = sget_signed_long(p);
p += 4;
icch->devClass = str2iccSig(p);
p += 4;
icch->colorSpace = str2iccSig(p);
p += 4;
icch->PCS = str2iccSig(p);
p += 4;
memcpy(icch->creationDate, p, 12);
p += 12;
icch->acsp = str2iccSig(p); /* acsp */
if (icch->acsp != str2iccSig("acsp")) {
WARN("Invalid ICC profile: not \"acsp\" - %c%c%c%c ",
p[0], p[1], p[2], p[3]);
return -1;
}
p += 4;
icch->platform = str2iccSig(p);
p += 4;
memcpy(icch->flags, p, 4);
p += 4;
icch->devMnfct = str2iccSig(p);
p += 4;
icch->devModel = str2iccSig(p);
p += 4;
memcpy(icch->devAttr, p, 8);
p += 8;
icch->intent = (p[0] << 24)|(p[1] << 16)|(p[2] << 8)|p[3];
p += 4;
icch->illuminant.X = sget_signed_long(p);
p += 4;
icch->illuminant.Y = sget_signed_long(p);
p += 4;
icch->illuminant.Z = sget_signed_long(p);
p += 4;
icch->creator = str2iccSig(p);
p += 4;
memcpy(icch->ID, p, 16);
p += 16;
/* 28 bytes reserved - must be set to zeros */
for (; p < endptr; p++) {
if (*p != '\0') {
WARN("Reserved pad not zero: %02x (at offset %ld in ICC profile header.)",
*p, 128 - ((long) (endptr - p)));
return -1;
}
}
return 0;
}
/* MD5 checksum with Rendering intent,
* Header attrs, Profile ID fields are
* set to zeros.
*/
#define ICC_HEAD_SECT1_START 0
#define ICC_HEAD_SECT1_LENGTH 56
/* 8 bytes devAttr, 4 bytes intent */
#define ICC_HEAD_SECT2_START 68
#define ICC_HEAD_SECT2_LENGTH 16
/* 16 bytes ID (checksum) */
#define ICC_HEAD_SECT3_START 100
#define ICC_HEAD_SECT3_LENGTH 28
#include "dpxcrypt.h"
static void
iccp_get_checksum (unsigned char *checksum, const void *profile, long proflen)
{
const unsigned char *p;
MD5_CONTEXT md5;
p = (const unsigned char *) profile;
texpdf_MD5_init (&md5);
texpdf_MD5_write(&md5, p + ICC_HEAD_SECT1_START, ICC_HEAD_SECT1_LENGTH);
texpdf_MD5_write(&md5, nullbytes16, 12);
texpdf_MD5_write(&md5, p + ICC_HEAD_SECT2_START, ICC_HEAD_SECT2_LENGTH);
texpdf_MD5_write(&md5, nullbytes16, 16);
texpdf_MD5_write(&md5, p + ICC_HEAD_SECT3_START, ICC_HEAD_SECT3_LENGTH);
/* body */
texpdf_MD5_write(&md5, p + 128, proflen - 128);
texpdf_MD5_final(checksum, &md5);
}
static void
print_iccp_header (iccHeader *icch, unsigned char *checksum)
{
int i;
ASSERT(icch);
#define print_iccSig(s,t) if ((s) == 0) {\
MESG("pdf_color>> %s:\t(null)\n", (t)); \
} else if (!isprint(((s) >> 24) & 0xff) || \
!isprint(((s) >> 16) & 0xff) || \
!isprint(((s) >> 8) & 0xff) || \
!isprint((s) & 0xff)) { \
MESG("pdf_color>> %s:\t(invalid)\n", (t)); \
} else { \
MESG("pdf_color>> %s:\t%c%c%c%c\n", (t), \
((s) >> 24) & 0xff, ((s) >> 16) & 0xff, \
((s) >> 8) & 0xff, (s) & 0xff); \
}
MESG("\n");
MESG("pdf_color>> ICC Profile Info\n");
MESG("pdf_color>> Profile Size:\t%ld bytes\n", icch->size);
print_iccSig(icch->CMMType, "CMM Type");
MESG("pdf_color>> Profile Version:\t%d.%01d.%01d\n",
(icch->version >> 24) & 0xff,
(icch->version >> 20) & 0x0f,
(icch->version >> 16) & 0x0f);
print_iccSig(icch->devClass, "Device Class");
print_iccSig(icch->colorSpace, "Color Space");