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
|
/* Copyright (C) 2001-2020 Artifex Software, Inc.
All Rights Reserved.
This software is provided AS-IS with no warranty, either express or
implied.
This software is distributed under license and may not be copied,
modified or distributed except as expressly authorized under the terms
of the license contained in the file LICENSE in this distribution.
Refer to licensing information at http://www.artifex.com or contact
Artifex Software, Inc., 1305 Grant Avenue - Suite 200, Novato,
CA 94945, U.S.A., +1(415)492-9861, for further information.
*/
/* Implementation of transparency, other than rendering */
#include "math_.h"
#include "memory_.h"
#include "gx.h"
#include "gserrors.h"
#include "gstrans.h"
#include "gsutil.h"
#include "gzstate.h"
#include "gxdevcli.h"
#include "gdevdevn.h"
#include "gxblend.h"
#include "gdevp14.h"
#include "gscspace.h"
#include "gxarith.h"
#include "gxclist.h"
#include "gsicc_manage.h"
/* ------ Transparency-related graphics state elements ------ */
int
gs_setblendmode(gs_gstate *pgs, gs_blend_mode_t mode)
{
#ifdef DEBUG
if (gs_debug_c('v')) {
static const char *const bm_names[] = { GS_BLEND_MODE_NAMES };
dmlprintf1(pgs->memory, "[v]("PRI_INTPTR")blend_mode = ", (intptr_t)pgs);
if (mode >= 0 && mode < countof(bm_names))
dmprintf1(pgs->memory, "%s\n", bm_names[mode]);
else
dmprintf1(pgs->memory, "%d??\n", (int)mode);
}
#endif
/* Map Compatible to Normal so other code treats Compatible as Normal */
/* Often BLEND_MODE_Normal is checked for optimized handling, and */
/* Compatible is now specified to be the same. */
if (mode == BLEND_MODE_Compatible)
mode = BLEND_MODE_Normal;
if ((int)mode < 0 || (int)mode > MAX_BLEND_MODE)
return_error(gs_error_rangecheck);
pgs->blend_mode = mode;
return 0;
}
gs_blend_mode_t
gs_currentblendmode(const gs_gstate *pgs)
{
return pgs->blend_mode;
}
int
gs_settextknockout(gs_gstate *pgs, bool knockout)
{
if_debug2m('v', pgs->memory, "[v]("PRI_INTPTR")text_knockout = %s\n",
(intptr_t)pgs, (knockout ? "true" : "false"));
pgs->text_knockout = knockout;
return 0;
}
bool
gs_currenttextknockout(const gs_gstate *pgs)
{
return pgs->text_knockout;
}
/* This is used to keep pdf14 compositor actions from the interpreter from
corrupting pattern renderings. For example, if the file has a softmask,
the intrepter will send push and pop transparency state commands when
q and Q operations are encountered. If we are writing out to a pattern
clist that has no trasparency we do not want these state changes to
be entered as compositor actions in the pattern clist */
static int
check_for_nontrans_pattern(gs_gstate *pgs, unsigned char *comp_name)
{
gx_device * dev = pgs->device;
bool is_patt_clist = gx_device_is_pattern_clist(dev);
bool is_patt_acum = gx_device_is_pattern_accum(dev);
/* Check if we are collecting data for a pattern that has no
transparency. In that case, we need to ignore the state changes */
if (is_patt_clist || is_patt_acum) {
if (is_patt_clist) {
gx_device_clist_writer *clwdev = (gx_device_clist_writer*) dev;
const gs_pattern1_instance_t *pinst = clwdev->pinst;
if (!(pinst->templat.uses_transparency)) {
if_debug1m('v', pgs->memory,
"[v]%s NOT sending in pattern\n",comp_name);
return(1);
}
}
if (is_patt_acum) {
gx_device_pattern_accum *padev = (gx_device_pattern_accum*) dev;
const gs_pattern1_instance_t *pinst = padev->instance;
if (!(pinst->templat.uses_transparency)) {
if_debug1m('v', pgs->memory,
"[v]%s NOT sending in pattern\n",comp_name);
return(1);
}
}
}
return(0);
}
/*
* Push a PDF 1.4 transparency compositor onto the current device. Note that
* if the current device already is a PDF 1.4 transparency compositor, the
* create_compositor will update its parameters but not create a new
* compositor device.
*/
static int
gs_gstate_update_pdf14trans2(gs_gstate * pgs, gs_pdf14trans_params_t * pparams, bool retain_on_create)
{
gx_device * dev = pgs->device;
gx_device *pdf14dev = NULL;
int code;
int curr_num = dev->color_info.num_components;
/*
* Send the PDF 1.4 create compositor action specified by the parameters.
*/
code = send_pdf14trans(pgs, dev, &pdf14dev, pparams, pgs->memory);
if (code < 0)
return code;
/*
* If we created a new PDF 1.4 compositor device then we need to install it
* into the graphics state.
*/
if (pdf14dev != dev) {
gx_set_device_only(pgs, pdf14dev);
gx_device_retain(pdf14dev, retain_on_create);
}
/* If we had a color space change and we are in overprint, then we need to
update the drawn_comps */
if (pgs->overprint && curr_num != pdf14dev->color_info.num_components) {
code = gs_do_set_overprint(pgs);
}
return code;
}
static int
gs_gstate_update_pdf14trans(gs_gstate * pgs, gs_pdf14trans_params_t * pparams)
{
return gs_gstate_update_pdf14trans2(pgs, pparams, true);
}
void
gs_trans_group_params_init(gs_transparency_group_params_t *ptgp, float opacity)
{
ptgp->ColorSpace = NULL; /* bogus, but can't do better */
ptgp->Isolated = false;
ptgp->Knockout = false;
ptgp->page_group = false;
ptgp->text_group = PDF14_TEXTGROUP_NO_BT;
ptgp->image_with_SMask = false;
ptgp->mask_id = 0;
ptgp->iccprofile = NULL;
ptgp->group_opacity = opacity;
ptgp->group_shape = 1.0;
ptgp->shade_group = false;
}
int
gs_update_trans_marking_params(gs_gstate * pgs)
{
gs_pdf14trans_params_t params = { 0 };
if_debug0m('v', pgs->memory, "[v]gs_update_trans_marking_params\n");
params.pdf14_op = PDF14_SET_BLEND_PARAMS;
return gs_gstate_update_pdf14trans(pgs, ¶ms);
}
int
gs_begin_transparency_group(gs_gstate *pgs,
const gs_transparency_group_params_t *ptgp,
const gs_rect *pbbox, pdf14_compositor_operations group_type)
{
gs_pdf14trans_params_t params = { 0 };
const gs_color_space *blend_color_space;
cmm_profile_t *profile;
if (check_for_nontrans_pattern(pgs,
(unsigned char *)"gs_begin_transparency_group")) {
return(0);
}
/*
* Put parameters into a compositor parameter and then call the
* create_compositor. This will pass the data to the PDF 1.4
* transparency device.
*/
params.pdf14_op = group_type;
params.Isolated = ptgp->Isolated;
params.Knockout = ptgp->Knockout;
if (group_type == PDF14_BEGIN_TRANS_PAGE_GROUP)
params.page_group = true;
params.image_with_SMask = ptgp->image_with_SMask;
params.opacity = ptgp->group_opacity;
params.shape = ptgp->group_shape;
params.blend_mode = pgs->blend_mode;
params.text_group = ptgp->text_group;
params.shade_group = ptgp->shade_group;
/* This function is called during the c-list writer side.
Store some information so that we know what the color space is
so that we can adjust according later during the clist reader.
We currently will use the concrete space for any space other than a
device space. However, if the device is a sep device it will blend
in DeviceN color space as required. */
blend_color_space = gs_currentcolorspace_inline(pgs);
if (gs_color_space_get_index(blend_color_space) > gs_color_space_index_DeviceCMYK) {
/* ICC and PS CIE based case. Note that unidirectional PS CIE color
spaces should not be allowed but end up occuring when processing
PDF files with -dUseCIEColor. We will end up using the appropriate
ICC default color space in these cases. */
blend_color_space = gs_currentcolorspace_inline(pgs);
} else {
blend_color_space = cs_concrete_space(blend_color_space, pgs);
if (!blend_color_space)
return_error(gs_error_undefined);
}
/* Note that if the /CS parameter was NOT present in the push
of the transparency group, then we must actually inherent
the previous group color space, or the color space of the
target device (process color model). Here we just want
to set it as a unknown type for clist writing, as we will take care
of using the parent group color space later during clist reading.
Also, if the group was not isolated we MUST use the parent group
color space regardless of what the group color space is specified to be.
Note that the page group should always be isolated */
if (group_type == PDF14_BEGIN_TRANS_PAGE_GROUP)
params.Isolated = true;
if (ptgp->ColorSpace == NULL || params.Isolated != true) {
params.group_color_type = UNKNOWN;
params.group_color_numcomps = 0;
} else {
/* The /CS parameter was present. Use what was set. Currently
all our Device spaces are actually ICC based. The other options
are if -dUseCIEColor is set, in which case it could be
coming in as a PS CIE color space, which should not be allowed
but should default to one of the default ICC color spaces. Note
that CalRGB and CalGray, which are valid bidirectional color spaces
are converted to ICC profiles during installation. PS CIE building
to ICC is delayed. */
if ( gs_color_space_is_ICC(blend_color_space) ) {
/* Blending space is ICC based. If we are doing c-list rendering
we will need to write this color space into the clist.
*/
params.group_color_type = ICC;
params.group_color_numcomps =
blend_color_space->cmm_icc_profile_data->num_comps;
/* Get the ICC profile */
params.iccprofile = blend_color_space->cmm_icc_profile_data;
params.icc_hash = blend_color_space->cmm_icc_profile_data->hashcode;
} else {
/* Color space was NOT ICC based. PS CIE space and DeviceN are the only
other option. Use the ICC default based upon the component count. */
switch (cs_num_components(blend_color_space)) {
case 1:
profile = pgs->icc_manager->default_gray;
break;
case 3:
profile = pgs->icc_manager->default_rgb;
break;
case 4:
profile = pgs->icc_manager->default_cmyk;
break;
default:
/* We can end up here if we are in a deviceN color space and
we have a sep output device */
profile = NULL;
params.group_color_type = DEVICEN;
params.group_color_numcomps = cs_num_components(blend_color_space);
break;
}
if (profile != NULL) {
params.group_color_type = ICC;
params.group_color_numcomps = profile->num_comps;
params.iccprofile = profile;
params.icc_hash = profile->hashcode;
}
}
}
#ifdef DEBUG
if (gs_debug_c('v')) {
static const char *const cs_names[] = {
GS_COLOR_SPACE_TYPE_NAMES
};
dmlprintf6(pgs->memory, "[v]("PRI_INTPTR")begin_transparency_group [%g %g %g %g] Num_grp_clr_comp = %d\n",
(intptr_t)pgs, pbbox->p.x, pbbox->p.y, pbbox->q.x, pbbox->q.y,params.group_color_numcomps);
if (ptgp->ColorSpace)
dmprintf1(pgs->memory, " CS = %s",
cs_names[(int)gs_color_space_get_index(ptgp->ColorSpace)]);
else
dmputs(pgs->memory, " (no CS)");
dmprintf4(pgs->memory, " Isolated = %d Knockout = %d text_group = %d page_group = %d\n",
ptgp->Isolated, ptgp->Knockout, ptgp->text_group, ptgp->page_group);
}
#endif
params.bbox = *pbbox;
return gs_gstate_update_pdf14trans(pgs, ¶ms);
}
int
gx_begin_transparency_group(gs_gstate * pgs, gx_device * pdev,
const gs_pdf14trans_params_t * pparams)
{
gs_transparency_group_params_t tgp = {0};
gs_rect bbox;
if (pparams->Background_components != 0 &&
pparams->Background_components != pdev->color_info.num_components)
return_error(gs_error_rangecheck);
tgp.Isolated = pparams->Isolated;
tgp.Knockout = pparams->Knockout;
tgp.page_group = pparams->page_group;
tgp.idle = pparams->idle;
tgp.mask_id = pparams->mask_id;
tgp.text_group = pparams->text_group;
tgp.shade_group = pparams->shade_group;
/* Needed so that we do proper blending */
tgp.group_color_type = pparams->group_color_type;
tgp.group_color_numcomps = pparams->group_color_numcomps;
tgp.iccprofile = pparams->iccprofile;
tgp.icc_hashcode = pparams->icc_hash;
tgp.group_opacity = pparams->opacity;
tgp.group_shape = pparams->shape;
pgs->blend_mode = pparams->blend_mode;
bbox = pparams->bbox;
#ifdef DEBUG
if (gs_debug_c('v')) {
static const char *const cs_names[] = {
GS_COLOR_SPACE_TYPE_NAMES
};
dmlprintf6(pdev->memory, "[v]("PRI_INTPTR")gx_begin_transparency_group [%g %g %g %g] Num_grp_clr_comp = %d\n",
(intptr_t)pgs, bbox.p.x, bbox.p.y, bbox.q.x, bbox.q.y,
pparams->group_color_numcomps);
dmlprintf2(pdev->memory, " opacity = %g shape = %g\n", pparams->opacity, pparams->shape);
if (tgp.ColorSpace)
dmprintf1(pdev->memory, " CS = %s",
cs_names[(int)gs_color_space_get_index(tgp.ColorSpace)]);
else
dmputs(pdev->memory, " (no CS)");
dmprintf3(pdev->memory, " Isolated = %d Knockout = %d page_group = %d\n",
tgp.Isolated, tgp.Knockout, tgp.page_group);
if (tgp.iccprofile)
dmprintf(pdev->memory, " Have ICC Profile for blending\n");
}
#endif
return (*dev_proc(pdev, begin_transparency_group)) (pdev, &tgp, &bbox, pgs,
NULL);
}
int
gs_end_transparency_group(gs_gstate *pgs)
{
gs_pdf14trans_params_t params = { 0 };
if (check_for_nontrans_pattern(pgs,
(unsigned char *)"gs_end_transparency_group")) {
return(0);
}
if_debug0m('v', pgs->memory, "[v]gs_end_transparency_group\n");
params.pdf14_op = PDF14_END_TRANS_GROUP; /* Other parameters not used */
return gs_gstate_update_pdf14trans(pgs, ¶ms);
}
int
gs_end_transparency_text_group(gs_gstate *pgs)
{
gs_pdf14trans_params_t params = { 0 };
if (check_for_nontrans_pattern(pgs,
(unsigned char *)"gs_end_transparency_text_group")) {
return(0);
}
if_debug0m('v', pgs->memory, "[v]gs_end_transparency_text_group\n");
params.pdf14_op = PDF14_END_TRANS_TEXT_GROUP; /* Other parameters not used */
return gs_gstate_update_pdf14trans(pgs, ¶ms);
}
int
gs_begin_transparency_text_group(gs_gstate *pgs)
{
gs_pdf14trans_params_t params = { 0 };
if (check_for_nontrans_pattern(pgs,
(unsigned char *)"gs_begin_transparency_text_group")) {
return(0);
}
if_debug0m('v', pgs->memory, "[v]gs_begin_transparency_text_group\n");
params.pdf14_op = PDF14_BEGIN_TRANS_TEXT_GROUP; /* Other parameters not used */
return gs_gstate_update_pdf14trans(pgs, ¶ms);
}
int
gx_end_transparency_group(gs_gstate * pgs, gx_device * pdev)
{
if_debug0m('v', pgs->memory, "[v]gx_end_transparency_group\n");
return (*dev_proc(pdev, end_transparency_group)) (pdev, pgs);
}
/* Commands for handling q softmask Q in graphic states */
int
gs_push_transparency_state(gs_gstate *pgs)
{
gs_pdf14trans_params_t params = { 0 };
int code;
if (check_for_nontrans_pattern(pgs,
(unsigned char *)"gs_push_transparency_state")) {
return(0);
}
/* Set the pending flag to true, which indicates
that we need to watch for end transparency
soft masks when we are at this graphic state
level */
/* pgs->trans_flags.xstate_pending = true; */
/* Actually I believe the above flag is not
needed. We really should be watching for
the softmask even at the base level. What
we need to watch for are q operations after
a soft mask end has occured. */
/* Check if we have a change flag set to true.
this indicates that a softmask is present.
We will need to send a push state to save
the current soft mask, so that we can
restore it later */
if (pgs->trans_flags.xstate_change) {
if_debug0m('v', pgs->memory, "[v]gs_push_transparency_state sending\n");
params.pdf14_op = PDF14_PUSH_TRANS_STATE;
code = gs_gstate_update_pdf14trans(pgs, ¶ms);
if (code < 0)
return(code);
} else {
if_debug0m('v', pgs->memory, "[v]gs_push_transparency_state NOT sending\n");
}
return(0);
}
int
gs_pop_transparency_state(gs_gstate *pgs, bool force)
{
gs_pdf14trans_params_t params = { 0 };
int code;
if (check_for_nontrans_pattern(pgs,
(unsigned char *)"gs_pop_transparency_state")) {
return(0);
}
/* Check if flag is set, which indicates that we have
an active softmask for the graphic state. We
need to communicate to the compositor to pop
the softmask */
if ( pgs->trans_flags.xstate_change || force) {
if_debug0m('v', pgs->memory, "[v]gs_pop_transparency_state sending\n");
params.pdf14_op = PDF14_POP_TRANS_STATE;
code = gs_gstate_update_pdf14trans(pgs, ¶ms);
if ( code < 0 )
return (code);
} else {
if_debug0m('v', pgs->memory, "[v]gs_pop_transparency_state NOT sending\n");
}
/* There is no reason to reset any of the flags since
they will be reset by the graphic state restore */
return(0);
}
int
gx_pop_transparency_state(gs_gstate * pgs, gx_device * pdev)
{
if_debug0m('v', pgs->memory, "[v]gx_pop_transparency_state\n");
return (*dev_proc(pdev, pop_transparency_state)) (pdev, pgs);
}
int
gx_push_transparency_state(gs_gstate * pgs, gx_device * pdev)
{
if_debug0m('v', pgs->memory, "[v]gx_push_transparency_state\n");
return (*dev_proc(pdev, push_transparency_state)) (pdev, pgs);
}
/*
* Handler for identity mask transfer functions.
*/
static int
mask_transfer_identity(double in, float *out, void *proc_data)
{
*out = (float) in;
return 0;
}
void
gs_trans_mask_params_init(gs_transparency_mask_params_t *ptmp,
gs_transparency_mask_subtype_t subtype)
{
ptmp->ColorSpace = 0;
ptmp->subtype = subtype;
ptmp->Background_components = 0;
ptmp->Matte_components = 0;
ptmp->GrayBackground = 0.0;
ptmp->TransferFunction = mask_transfer_identity;
ptmp->TransferFunction_data = 0;
ptmp->replacing = false;
ptmp->iccprofile = NULL;
}
int
gs_begin_transparency_mask(gs_gstate * pgs,
const gs_transparency_mask_params_t * ptmp,
const gs_rect * pbbox, bool mask_is_image)
{
gs_pdf14trans_params_t params = { 0 };
gs_pdf14trans_params_t params_color = { 0 };
const int l = sizeof(params.Background[0]) * ptmp->Background_components;
const int m = sizeof(params.Matte[0]) * ptmp->Matte_components;
int i, code;
gs_color_space *blend_color_space;
gsicc_manager_t *icc_manager = pgs->icc_manager;
bool deep = device_is_deep(pgs->device);
if (check_for_nontrans_pattern(pgs,
(unsigned char *)"gs_pop_transparency_state")) {
return(0);
}
params.pdf14_op = PDF14_BEGIN_TRANS_MASK;
params.bbox = *pbbox;
params.subtype = ptmp->subtype;
params.Background_components = ptmp->Background_components;
memcpy(params.Background, ptmp->Background, l);
params.Matte_components = ptmp->Matte_components;
memcpy(params.Matte, ptmp->Matte, m);
params.GrayBackground = ptmp->GrayBackground;
params.transfer_function = ptmp->TransferFunction_data;
params.function_is_identity =
(ptmp->TransferFunction == mask_transfer_identity);
params.mask_is_image = mask_is_image;
params.replacing = ptmp->replacing;
/* The eventual state that we want this smask to be moved to
is always gray. This should provide us with a significant
speed improvement over the old code. This does not keep us
from having groups within the softmask getting blended in different
color spaces, it just makes the final space be gray, which is what
we will need to get to eventually anyway. In this way we avoid a
final color conversion on a potentially large buffer. */
/* Also check if we have loaded in the transparency icc profiles. If not
go ahead and take care of that now */
if (icc_manager->smask_profiles == NULL) {
code = gsicc_initialize_iccsmask(icc_manager);
if (code < 0)
return(code);
}
/* A new soft mask group, make sure the profiles are set */
if_debug0m('v', pgs->memory, "[v]pushing soft mask color sending\n");
if (params.subtype != TRANSPARENCY_MASK_None) {
params_color.pdf14_op = PDF14_PUSH_SMASK_COLOR;
code = gs_gstate_update_pdf14trans(pgs, ¶ms_color);
if (code < 0)
return(code);
blend_color_space = gs_cspace_new_DeviceGray(pgs->memory);
if (blend_color_space == NULL)
return_error(gs_error_VMerror);
blend_color_space->cmm_icc_profile_data = pgs->icc_manager->default_gray;
gsicc_adjust_profile_rc(blend_color_space->cmm_icc_profile_data, 1, "gs_begin_transparency_mask");
if_debug9m('v', pgs->memory, "[v]("PRI_INTPTR")gs_begin_transparency_mask [%g %g %g %g]\n"
" subtype = %d Background_components = %d, Matte_components = %d, %s\n",
(intptr_t)pgs, pbbox->p.x, pbbox->p.y, pbbox->q.x, pbbox->q.y,
(int)ptmp->subtype, ptmp->Background_components,
ptmp->Matte_components,
(ptmp->TransferFunction == mask_transfer_identity ? "no TR" :
"has TR"));
/* Sample the transfer function */
/* For non-deep cases, we sample at 00,01,02..fe,ff.
* For deep cases, we sample from 0000,0100,0200..fe00,ff00 and a final one at ffff.
* This enables us to interpolate easily.
*/
if (deep) {
uint16_t *trans16 = (uint16_t *)params.transfer_fn;
float out;
for (i = 0; i < MASK_TRANSFER_FUNCTION_SIZE; i++) {
float in = (float)(i * (1.0 / MASK_TRANSFER_FUNCTION_SIZE));
ptmp->TransferFunction(in, &out, ptmp->TransferFunction_data);
trans16[i] = (uint16_t)floor((double)(out * 65535 + 0.5));
}
ptmp->TransferFunction(1.0, &out, ptmp->TransferFunction_data);
trans16[MASK_TRANSFER_FUNCTION_SIZE] = (uint16_t)floor((double)(out * 65535 + 0.5));
} else {
for (i = 0; i < MASK_TRANSFER_FUNCTION_SIZE; i++) {
float in = (float)(i * (1.0 / (MASK_TRANSFER_FUNCTION_SIZE - 1)));
float out;
ptmp->TransferFunction(in, &out, ptmp->TransferFunction_data);
params.transfer_fn[i] = (byte)floor((double)(out * 255 + 0.5));
}
}
/* Note: This function is called during the c-list writer side. */
if ( blend_color_space->cmm_icc_profile_data != NULL ) {
/* Blending space is ICC based. If we are doing c-list rendering we will
need to write this color space into the clist. */
params.group_color_type = ICC;
params.group_color_numcomps =
blend_color_space->cmm_icc_profile_data->num_comps;
/* Get the ICC profile */
/* We don't reference count this - see comment in
* pdf14_update_device_color_procs_pop_c()
*/
params.iccprofile = blend_color_space->cmm_icc_profile_data;
params.icc_hash = blend_color_space->cmm_icc_profile_data->hashcode;
} else {
params.group_color_type = GRAY_SCALE;
params.group_color_numcomps = 1; /* Need to check */
}
/* Explicitly decrement the profile data since blend_color_space may not
* be an ICC color space object.
*/
gsicc_adjust_profile_rc(blend_color_space->cmm_icc_profile_data, -1, "gs_begin_transparency_mask");
rc_decrement_only_cs(blend_color_space, "gs_begin_transparency_mask");
}
return gs_gstate_update_pdf14trans(pgs, ¶ms);
}
/* This occurs on the c-list reader side */
int
gx_begin_transparency_mask(gs_gstate * pgs, gx_device * pdev,
const gs_pdf14trans_params_t * pparams)
{
gx_transparency_mask_params_t tmp;
const int l = sizeof(pparams->Background[0]) * pparams->Background_components;
const int m = sizeof(pparams->Matte[0]) * pparams->Matte_components;
tmp.group_color_type = pparams->group_color_type;
tmp.subtype = pparams->subtype;
tmp.group_color_numcomps = pparams->group_color_numcomps;
tmp.Background_components = pparams->Background_components;
memcpy(tmp.Background, pparams->Background, l);
tmp.Matte_components = pparams->Matte_components;
memcpy(tmp.Matte, pparams->Matte, m);
tmp.GrayBackground = pparams->GrayBackground;
tmp.function_is_identity = pparams->function_is_identity;
tmp.idle = pparams->idle;
tmp.replacing = pparams->replacing;
tmp.mask_id = pparams->mask_id;
if (tmp.group_color_type == ICC ) {
/* Do I need to ref count here? */
tmp.iccprofile = pparams->iccprofile;
tmp.icc_hashcode = pparams->icc_hash;
} else {
tmp.iccprofile = NULL;
tmp.icc_hashcode = 0;
}
memcpy(tmp.transfer_fn, pparams->transfer_fn, size_of(tmp.transfer_fn));
if_debug10m('v', pgs->memory,
"[v]("PRI_INTPTR")gx_begin_transparency_mask [%g %g %g %g]\n"
" subtype = %d Background_components = %d Matte_components = %d Num_grp_clr_comp = %d %s\n",
(intptr_t)pgs, pparams->bbox.p.x, pparams->bbox.p.y,
pparams->bbox.q.x, pparams->bbox.q.y,
(int)tmp.subtype, tmp.Background_components, tmp.Matte_components,
tmp.group_color_numcomps,
(tmp.function_is_identity ? "no TR" :
"has TR"));
return (*dev_proc(pdev, begin_transparency_mask))
(pdev, &tmp, &(pparams->bbox), pgs, NULL);
}
int
gs_end_transparency_mask(gs_gstate *pgs,
gs_transparency_channel_selector_t csel)
{
gs_pdf14trans_params_t params = { 0 };
gs_pdf14trans_params_t params_color = { 0 };
int code;
if (check_for_nontrans_pattern(pgs,
(unsigned char *)"gs_end_transparency_mask")) {
return(0);
}
/* If we have done a q then set a flag to watch for any Qs */
/* if (pgs->trans_flags.xstate_pending)
pgs->trans_flags.xstate_change = true; */
/* This should not depend upon if we have encountered a q
operation. We could be setting a softmask, before
there is any q operation. Unlikely but it could happen.
Then if we encouter a q operation (and this flag
is true) we will need to
push the mask graphic state (PDF14_PUSH_TRANS_STATE). */
pgs->trans_flags.xstate_change = true;
if_debug1m('v', pgs->memory,
"[v]xstate_changed set true, gstate level is %d\n", pgs->level);
if_debug2m('v', pgs->memory,
"[v]("PRI_INTPTR")gs_end_transparency_mask(%d)\n", (intptr_t)pgs,
(int)csel);
params.pdf14_op = PDF14_END_TRANS_MASK; /* Other parameters not used */
params.csel = csel;
/* If this is the outer end then return us to our normal defaults */
if_debug0m('v', pgs->memory, "[v]popping soft mask color sending\n");
params_color.pdf14_op = PDF14_POP_SMASK_COLOR;
code = gs_gstate_update_pdf14trans(pgs, ¶ms_color);
if (code < 0)
return(code);
return gs_gstate_update_pdf14trans(pgs, ¶ms);
}
int
gx_end_transparency_mask(gs_gstate * pgs, gx_device * pdev,
const gs_pdf14trans_params_t * pparams)
{
if_debug2m('v', pgs->memory,
"[v]("PRI_INTPTR")gx_end_transparency_mask(%d)\n", (intptr_t)pgs,
(int)pparams->csel);
return (*dev_proc(pdev, end_transparency_mask)) (pdev, pgs);
}
/*
* We really only care about the number of spot colors when we have
* a device which supports spot colors. With the other devices we use
* the tint transform function for DeviceN and Separation color spaces
* and convert spot colors into process colors.
*/
static int
get_num_pdf14_spot_colors(gs_gstate * pgs)
{
gx_device * dev = pgs->device;
gs_devn_params * pclist_devn_params = dev_proc(dev, ret_devn_params)(dev);
/*
* Devices which support spot colors store the PageSpotColors device
* parameter inside their devn_params structure. (This is done by the
* devn_put_params routine.) The PageSpotColors device parameter is
* set by pdf_main whenever a PDF page is being processed. See
* countspotcolors in lib/pdf_main.ps.
*/
if (pclist_devn_params != NULL) {
/* If the sep order names were specified, then we should only allocate
for those. But only the nonstandard colorants that are stored
in num_separations. See devn_put_params for details on this.
Right now, the PDF14 device will always include CMYK. A future
optimization is to be able to NOT have those included in the buffer
allocations if we don't specify them. It would then be possible to
output 8 separations at a time without using compressed color. */
if (pclist_devn_params->num_separation_order_names == 0) {
return pclist_devn_params->page_spot_colors;
}
return (pclist_devn_params->separations.num_separations);
}
return 0;
}
int
gs_push_pdf14trans_device(gs_gstate * pgs, bool is_pattern, bool retain)
{
gs_pdf14trans_params_t params = { 0 };
cmm_profile_t *icc_profile;
gsicc_rendering_param_t render_cond;
int code;
cmm_dev_profile_t *dev_profile;
code = dev_proc(pgs->device, get_profile)(pgs->device, &dev_profile);
if (code < 0)
return code;
gsicc_extract_profile(GS_UNKNOWN_TAG, dev_profile, &icc_profile,
&render_cond);
params.pdf14_op = PDF14_PUSH_DEVICE;
/*
* We really only care about the number of spot colors when we have
* a device which supports spot colors. With the other devices we use
* the tint transform function for DeviceN and Separation color spaces
* and convert spot colors into process colors.
*/
params.num_spot_colors = get_num_pdf14_spot_colors(pgs);
params.is_pattern = is_pattern;
/* If we happen to be in a situation where we are going out to a device
whose profile is CIELAB then we will need to make sure that we
do our blending in RGB and convert to CIELAB when we do the put_image
command */
if (icc_profile->data_cs == gsCIELAB ||
icc_profile->islab) {
params.iccprofile = pgs->icc_manager->default_rgb;
}
/* Note: Other parameters not used */
return gs_gstate_update_pdf14trans2(pgs, ¶ms, retain);
}
int
gs_pop_pdf14trans_device(gs_gstate * pgs, bool is_pattern)
{
gs_pdf14trans_params_t params = { 0 };
params.is_pattern = is_pattern;
params.pdf14_op = PDF14_POP_DEVICE; /* Other parameters not used */
return gs_gstate_update_pdf14trans(pgs, ¶ms);
}
int
gs_abort_pdf14trans_device(gs_gstate * pgs)
{
gs_pdf14trans_params_t params = { 0 };
params.pdf14_op = PDF14_ABORT_DEVICE; /* Other parameters not used */
return gs_gstate_update_pdf14trans(pgs, ¶ms);
}
/* Something has gone wrong have the device clean up everything */
int
gx_abort_trans_device(gs_gstate * pgs, gx_device * pdev)
{
if_debug1m('v', pgs->memory, "[v]("PRI_INTPTR")gx_abort_trans_device\n", (intptr_t)pgs);
return (*dev_proc(pdev, discard_transparency_layer)) (pdev, pgs);
}
int gs_setstrokeconstantalpha(gs_gstate *pgs, float alpha)
{
pgs->strokeconstantalpha = alpha;
return 0;
}
float gs_getstrokeconstantalpha(const gs_gstate *pgs)
{
return pgs->strokeconstantalpha;
}
int gs_setfillconstantalpha(gs_gstate *pgs, float alpha)
{
pgs->fillconstantalpha = (float)alpha;
return 0;
}
float gs_getfillconstantalpha(const gs_gstate *pgs)
{
return pgs->fillconstantalpha;
}
int gs_setalphaisshape(gs_gstate *pgs, bool AIS)
{
pgs->alphaisshape = AIS;
return 0;
}
bool gs_getalphaisshape(gs_gstate *pgs)
{
return pgs->alphaisshape;
}
|