1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
|
/* Copyright (C) 2001-2022 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.
*/
/* Command list reading for Ghostscript. */
#include "memory_.h"
#include "gx.h"
#include "gp.h" /* for gp_fmode_rb */
#include "gpcheck.h"
#include "gserrors.h"
#include "gxdevice.h"
#include "gscoord.h" /* requires gsmatrix.h */
#include "gsdevice.h" /* for gs_deviceinitialmatrix */
#include "gxdevmem.h" /* must precede gxcldev.h */
#include "gxcldev.h"
#include "gxgetbit.h"
#include "gxhttile.h"
#include "gdevplnx.h"
#include "gdevp14.h"
#include "gsmemory.h"
#include "gsicc_cache.h"
/*
* We really don't like the fact that gdevprn.h is included here, since
* command lists are supposed to be usable for purposes other than printer
* devices; but gdev_prn_color_usage and gdev_create_buf_device are
* currently only applicable to printer devices.
*/
#include "gdevprn.h"
#include "stream.h"
#include "strimpl.h"
/* #define EXTRA_OFFSET_MAP_DEBUGGING */
/* forward decl */
private_st_clist_icctable_entry();
private_st_clist_icctable();
/* ------ Band file reading stream ------ */
#ifdef DEBUG
/* An auxiliary table for mapping clist buffer offsets to cfile offsets. */
typedef struct {
uint buffered;
int64_t file_offset;
} cbuf_offset_map_elem;
#endif
/*
* To separate banding per se from command list interpretation,
* we make the command list interpreter simply read from a stream.
* When we are actually doing banding, the stream filters the band file
* and only passes through the commands for the current bands (or band
* ranges that include a current band).
*/
typedef struct stream_band_read_state_s {
stream_state_common;
gx_band_page_info_t page_info;
int band_first, band_last;
uint left; /* amount of data left in this run */
cmd_block b_this;
gs_memory_t *local_memory;
#ifdef DEBUG
bool skip_first;
cbuf_offset_map_elem *offset_map;
int bytes_skipped;
int offset_map_length;
int offset_map_max_length;
int skip_next;
#endif
} stream_band_read_state;
static int
s_band_read_init(stream_state * st)
{
stream_band_read_state *const ss = (stream_band_read_state *) st;
const clist_io_procs_t *io_procs = ss->page_info.io_procs;
ss->left = 0;
ss->b_this.band_min = 0;
ss->b_this.band_max = 0;
ss->b_this.pos = 0;
return io_procs->rewind(ss->page_bfile, false, ss->page_bfname);
}
#ifdef DEBUG
static int
s_band_read_init_offset_map(gx_device_clist_reader *crdev, stream_state * st)
{
stream_band_read_state *const ss = (stream_band_read_state *) st;
if (gs_debug_c('L')) {
ss->offset_map_length = 0;
ss->offset_map_max_length = cbuf_size + 1; /* fixme: Wanted a more accurate implementation. */
ss->offset_map = (cbuf_offset_map_elem *)gs_alloc_byte_array(crdev->memory,
ss->offset_map_max_length, sizeof(*ss->offset_map), "s_band_read_init_offset_map");
if (ss->offset_map == NULL)
return_error(gs_error_VMerror);
ss->offset_map[0].buffered = 0;
ss->bytes_skipped = 0;
crdev->offset_map = ss->offset_map; /* Prevent collecting it as garbage.
Debugged with ppmraw -r300 014-09.ps . */
} else {
ss->offset_map_length = 0;
ss->offset_map_max_length = 0;
ss->offset_map = NULL;
ss->bytes_skipped = 0;
crdev->offset_map = NULL;
}
ss->skip_first = true;
ss->skip_next = 0;
return 0;
}
static void
s_band_read_dnit_offset_map(gx_device_clist_reader *crdev, stream_state * st)
{
if (gs_debug_c('L')) {
stream_band_read_state *const ss = (stream_band_read_state *) st;
gs_free_object(crdev->memory, ss->offset_map, "s_band_read_dnit_offset_map");
crdev->offset_map = 0;
}
}
#endif
static int
s_band_read_process(stream_state * st, stream_cursor_read * ignore_pr,
stream_cursor_write * pw, bool last)
{
stream_band_read_state *const ss = (stream_band_read_state *) st;
register byte *q = pw->ptr;
byte *wlimit = pw->limit;
clist_file_ptr cfile = ss->page_cfile;
clist_file_ptr bfile = ss->page_bfile;
uint left = ss->left;
int status = 1;
uint count;
const clist_io_procs_t *io_procs = ss->page_info.io_procs;
int64_t pos;
/* left = number of bytes unread in the current command. */
/* count = number of bytes we have room in our buffer for. */
while ((count = wlimit - q) != 0) {
int bmin, bmax;
/* If there is more data to be read in the current command, then pull that in. */
if (left) {
if (count > left)
count = left;
#ifdef DEBUG
if (gs_debug_c('L')) {
if (ss->skip_next) {
/* This buffer fill is NOT going into the normal buffer. */
ss->skip_next = 0;
ss->bytes_skipped += count;
#ifdef EXTRA_OFFSET_MAP_DEBUGGING
if (ss->offset_map_length != 1) {
dmlprintf(ss->local_memory, "offset_map: confused!\n");
exit(1);
}
#endif
} else {
#ifdef EXTRA_OFFSET_MAP_DEBUGGING
if (ss->offset_map[ss->offset_map_length - 1].buffered + count > cbuf_size*2) {
dmlprintf2(ss->local_memory, "Invalid update to buffered. %d %d\n",
ss->offset_map[ss->offset_map_length - 1].buffered, count);
exit(1);
}
#endif
ss->offset_map[ss->offset_map_length - 1].buffered += count;
}
}
#endif
io_procs->fread_chars(q + 1, count, cfile);
if (io_procs->ferror_code(cfile) < 0) {
status = ERRC;
break;
}
q += count;
left -= count;
process_interrupts(ss->local_memory);
continue;
}
/* The current command is over. So find the next command in the bfile
* that applies to the current band(s) and read that in. */
do {
int nread;
/* If we hit eof, end! */
/* Could this test be moved into the nread < sizeof() test below? */
if (ss->b_this.band_min == cmd_band_end &&
io_procs->ftell(bfile) == ss->page_bfile_end_pos) {
pw->ptr = q;
ss->left = left;
return EOFC;
}
/* Read the next cmd_block from the bfile. Each cmd_block contains
* the bands to use, and the file position of the END of the data.
* We therefore want to read the data from the file position given
* in the PREVIOUS record onwards, and compare to the band min/max
* given there too. */
bmin = ss->b_this.band_min;
bmax = ss->b_this.band_max;
pos = ss->b_this.pos; /* Record where our data starts! */
nread = io_procs->fread_chars(&ss->b_this, sizeof(ss->b_this), bfile);
if (nread < sizeof(ss->b_this)) {
DISCARD(gs_note_error(gs_error_unregistered)); /* Must not happen. */
return ERRC;
}
} while (ss->band_last < bmin || ss->band_first > bmax);
/* So let's set up to read the actual command data from cfile. Seek... */
io_procs->fseek(cfile, pos, SEEK_SET, ss->page_cfname);
left = (uint) (ss->b_this.pos - pos);
#ifdef DEBUG
if (left > 0 && gs_debug_c('L')) {
if (ss->offset_map_length >= ss->offset_map_max_length) {
DISCARD(gs_note_error(gs_error_unregistered)); /* Must not happen. */
return ERRC;
}
ss->offset_map[ss->offset_map_length].file_offset = pos;
ss->offset_map[ss->offset_map_length].buffered = 0;
ss->offset_map_length++;
}
#endif
if_debug5m('l', ss->local_memory,
"[l]reading for bands (%d,%d) at bfile %"PRId64", cfile %"PRId64", length %u\n",
bmin, bmax,
(io_procs->ftell(bfile) - sizeof(ss->b_this)), (int64_t)pos, left);
}
pw->ptr = q;
ss->left = left;
return status;
}
/* Stream template */
static const stream_template s_band_read_template = {
&st_stream_state, s_band_read_init, s_band_read_process, 1, cbuf_size
};
#ifdef DEBUG
/* In DEBUG builds, we maintain an "offset_map" within stream_band_read_state,
* that allows us to relate offsets within the buffer, to offsets within the
* cfile.
*
* At any given point, for stream_band_read_state *ss:
* There are n = ss->offset_map_length records in the table.
* offset = 0;
* for (i = 0; i < n; i++)
* // Offset 'offset' in the buffer corresponds to ss->offset_map[i].file_offset in the file.
* offset += ss->offset_map[i].buffered
*
* As we pull data from the stream, we keep file_offset and buffered up to date. Note that
* there are 2 cbuf_size sized buffers in play here. The cmd_buffer has one cbuf_size sized
* buffer in it. Data is pulled into that from the stream, which has another cbuf_sized
* buffer into it. Accordingly, 'buffered' should never be > 2*cbuf_size = 8192.
*
* Sometimes we will pull data out of the stream, bypassing the cmd_buffer's buffer. In this
* case, we 'skip' data, and record the number of bytes skipped in ss->bytes_skipped. This
* should only ever happen when we have already advanced as much as possible (i.e. when the
* current offset is in the first record).
*/
/* Given buffer_offset (an offset within the buffer), return the number of the offset_map
* record that contains it. Also fill poffset0 in with the offset of the start of that
* record within the buffer. (NOTE, depending on how much of the record has already been
* read, some bytes may already have been lost). */
static int
buffer_segment_index(const stream_band_read_state *ss, uint buffer_offset, uint *poffset0)
{
uint i, offset0, offset = 0;
#ifdef EXTRA_OFFSET_MAP_DEBUGGING
dmlprintf1(ss->local_memory, "buffer_segment_index: buffer_offset=%d\n", buffer_offset);
for (i = 0; i < ss->offset_map_length; i++) {
dmlprintf3(ss->local_memory, " offset_map[%d].file_offset=%"PRId64" buffered=%d\n", i, ss->offset_map[i].file_offset, ss->offset_map[i].buffered);
}
#endif
for (i = 0; i < ss->offset_map_length; i++) {
offset0 = offset;
offset += ss->offset_map[i].buffered;
if (buffer_offset < offset) {
*poffset0 = offset0;
return i;
}
}
/* Now cope with the case where we've read exactly to the end of the buffer.
* There might be more data still to come. */
if (buffer_offset == offset) {
*poffset0 = offset0;
return i-1;
}
#ifdef EXTRA_OFFSET_MAP_DEBUGGING
dmlprintf1(ss->local_memory, "buffer_segment_index fail: buffer_offset=%d not found\n", buffer_offset);
exit(1);
#else
(void)gs_note_error(gs_error_unregistered); /* Must not happen. */
#endif
return -1;
}
/* Map from a buffer offset, to the offset of the corresponding byte in the
* cfile. */
int64_t
clist_file_offset(const stream_state * st, uint buffer_offset)
{
const stream_band_read_state *ss = (const stream_band_read_state *) st;
uint offset0;
int i = buffer_segment_index(ss, buffer_offset, &offset0);
return ss->offset_map[i].file_offset + (uint)(buffer_offset - offset0);
}
void
top_up_offset_map(stream_state * st, const byte *buf, const byte *ptr, const byte *end)
{
/* NOTE: The clist data are buffered in the clist reader buffer and in the
internal buffer of the clist stream. Since the 1st buffer is not accessible
from s_band_read_process, offset_map corresponds the union of the 2 buffers.
*/
stream_band_read_state *const ss = (stream_band_read_state *) st;
uint buffer_offset, offset0, consumed;
int i;
#ifdef EXTRA_OFFSET_MAP_DEBUGGING
if (ptr < buf || end < ptr || end < buf || end > buf + cbuf_size)
{
dmlprintf3(ss->local_memory, "Invalid pointers for top_up_offset_map: buf=%p ptr=%p end=%p\n", buf, ptr, end);
}
#endif
if (!gs_debug_c('L'))
return;
if (ss->skip_first) {
/* Work around the trick with initializing the buffer pointer with the buffer end. */
ss->skip_first = false;
return;
}
if (ptr == buf)
return;
/* We know that buf <= ptr <= end <= buf+4096, so uint is quite enough! */
buffer_offset = ptr - buf;
i = buffer_segment_index(ss, buffer_offset, &offset0);
consumed = buffer_offset - offset0;
#ifdef EXTRA_OFFSET_MAP_DEBUGGING
dmlprintf3(ss->local_memory, "offset_map: dump %d entries + %d bytes + %d skipped bytes\n", i, consumed, ss->bytes_skipped);
if (ss->offset_map[i].buffered < consumed) {
dmlprintf2(ss->local_memory, "Invalid update to buffered. B %d %d\n", ss->offset_map[i].buffered, consumed);
exit(1);
}
#endif
ss->offset_map[i].buffered -= consumed;
ss->offset_map[i].file_offset += consumed;
ss->bytes_skipped = 0;
if (i) {
memmove(ss->offset_map, ss->offset_map + i,
(ss->offset_map_length - i) * sizeof(*ss->offset_map));
ss->offset_map_length -= i;
}
}
/* This function is called when data is copied from the stream out into a separate
* buffer without going through the usual clist buffers. Essentially data for the
* id we are reading at buffer_offset within the buffer is skipped. */
void adjust_offset_map_for_skipped_data(stream_state *st, uint buffer_offset, uint skipped)
{
uint offset0;
stream_band_read_state *const ss = (stream_band_read_state *) st;
int i;
if (!gs_debug_c('L'))
return;
i = buffer_segment_index(ss, buffer_offset, &offset0);
ss->offset_map[i].buffered -= skipped;
ss->offset_map[i].file_offset += skipped;
}
void
offset_map_next_data_out_of_band(stream_state *st)
{
stream_band_read_state *const ss = (stream_band_read_state *) st;
if (!gs_debug_c('L'))
return;
ss->skip_next = 1;
}
#endif /* DEBUG */
/* ------ Reading/rendering ------ */
/* Calculate the raster for a chunky or planar device. */
static int
clist_plane_raster(const gx_device *dev, const gx_render_plane_t *render_plane)
{
return gx_device_raster_plane(dev, render_plane);
}
/* Select full-pixel rendering if required for RasterOp. */
void
clist_select_render_plane(gx_device *dev, int y, int height,
gx_render_plane_t *render_plane, int index)
{
if (index >= 0) {
gx_color_usage_t color_usage;
int ignore_start;
gdev_prn_color_usage(dev, y, height, &color_usage, &ignore_start);
if (color_usage.slow_rop)
index = -1;
}
if (index < 0)
render_plane->index = index;
else
gx_render_plane_init(render_plane, dev, index);
}
/*
* Do device setup from params stored in command list. This is only for
* async rendering & assumes that the first command in every command list
* is a put_params command which sets all space-related parameters to the
* value they will have for the duration of that command list.
*/
int
clist_setup_params(gx_device *dev)
{
gx_device_clist *cldev = (gx_device_clist *)dev;
gx_device_clist_reader * const crdev = &cldev->reader;
int code = clist_render_init(cldev);
if (code < 0)
return code;
code = clist_playback_file_bands(playback_action_setup,
crdev, &crdev->page_info, 0, 0, 0, 0, 0);
/* put_params may have reinitialized device into a writer */
clist_render_init(cldev);
return code;
}
int
clist_close_writer_and_init_reader(gx_device_clist *cldev)
{
gx_device_clist_reader * const crdev = &cldev->reader;
gs_memory_t *base_mem = crdev->memory->thread_safe_memory;
gs_memory_status_t mem_status;
int code = 0;
/* Initialize for rendering if we haven't done so yet. */
if (crdev->ymin < 0) {
code = clist_end_page(&cldev->writer);
if (code < 0)
return code;
code = clist_render_init(cldev);
if (code < 0)
return code;
/* allocate and load the color_usage_array */
code = clist_read_color_usage_array(crdev);
if (code < 0)
return code;
/* Check for and get ICC profile table */
code = clist_read_icctable(crdev);
if (code < 0)
return code;
/* Allocate the icc cache for the clist reader */
/* Since we may be rendering in multiple threads, make sure the memory */
/* is thread safe by using a known thread_safe memory allocator */
gs_memory_status(base_mem, &mem_status);
if (mem_status.is_thread_safe == false) {
return_error(gs_error_VMerror);
}
if (crdev->icc_cache_cl == NULL) {
code = (crdev->icc_cache_cl = gsicc_cache_new(base_mem)) == NULL ? gs_error_VMerror : code;
}
}
check_device_compatible_encoding((gx_device *)cldev);
return code;
}
/* Used to find the command block information in the bfile
that is related to extra information stored in a psuedo band.
Currently application of this is storage of the ICC profile
table, the per-band color_usage array, and the spot equivalent
colors when doing overprint simulation. We may eventually
use this for storing other information like compressed images. */
static int
clist_find_pseudoband(gx_device_clist_reader *crdev, int band, cmd_block *cb)
{
gx_band_page_info_t *page_info = &(crdev->page_info);
clist_file_ptr bfile = page_info->bfile;
int64_t save_pos = page_info->bfile_end_pos;
int64_t start_pos;
int code;
if (bfile == NULL) {
/* files haven't been opened yet. Do it now */
char fmode[4];
strcpy(fmode, "r");
strncat(fmode, gp_fmode_binary_suffix, 1);
if ((code=page_info->io_procs->fopen(page_info->cfname, fmode,
&page_info->cfile,
crdev->memory, crdev->memory, true)) < 0 ||
(code=page_info->io_procs->fopen(page_info->bfname, fmode,
&page_info->bfile,
crdev->memory, crdev->memory, false)) < 0) {
return code;
}
bfile = page_info->bfile;
}
/* Go to the start of the last command block */
start_pos = page_info->bfile_end_pos - sizeof(cmd_block);
page_info->io_procs->fseek(bfile, start_pos, SEEK_SET, page_info->bfname);
while( 1 ) {
int read = page_info->io_procs->fread_chars(cb, sizeof(cmd_block), bfile);
if (read < sizeof(cmd_block))
return -1;
if (cb->band_max == band && cb->band_min == band) {
page_info->io_procs->fseek(bfile, save_pos, SEEK_SET, page_info->bfname);
return(0); /* Found it */
}
start_pos -= sizeof(cmd_block);
if (start_pos < 0) {
page_info->io_procs->fseek(bfile, save_pos, SEEK_SET, page_info->bfname);
return(-1); /* Did not find it before getting into other stuff in normal bands */
}
page_info->io_procs->fseek(bfile, start_pos, SEEK_SET, page_info->bfname);
}
}
/* A procedure to read a chunk of data from the cfile at a particular location into buff */
int
clist_read_chunk(gx_device_clist_reader *crdev, int64_t position, int size, unsigned char *buf)
{
clist_file_ptr cfile = crdev->page_info.cfile;
int64_t save_pos;
/* Save our current location */
save_pos = crdev->page_info.io_procs->ftell(cfile);
/* Go to our new position */
crdev->page_info.io_procs->fseek(cfile, position, SEEK_SET, crdev->page_info.cfname);
/* Get the data */
crdev->page_info.io_procs->fread_chars(buf, size, cfile);
/* Restore our position */
crdev->page_info.io_procs->fseek(cfile, save_pos, SEEK_SET, crdev->page_info.cfname);
return 0;
}
/* read the color_usage_array back from the pseudo band */
int
clist_read_color_usage_array(gx_device_clist_reader *crdev)
{
int code, size_data = crdev->nbands * sizeof(gx_color_usage_t );
cmd_block cb;
if (crdev->color_usage_array != NULL)
gs_free_object(crdev->memory, crdev->color_usage_array,
"clist reader color_usage_array");
crdev->color_usage_array = (gx_color_usage_t *)gs_alloc_bytes(crdev->memory, size_data,
"clist reader color_usage_array");
if (crdev->color_usage_array == NULL)
return_error(gs_error_VMerror);
code = clist_find_pseudoband(crdev, crdev->nbands + COLOR_USAGE_OFFSET - 1, &cb);
if (code < 0)
return code;
code = clist_read_chunk(crdev, cb.pos, size_data, (unsigned char *)crdev->color_usage_array);
return code;
}
/* read the cmyk equivalent spot colors */
int
clist_read_op_equiv_cmyk_colors(gx_device_clist_reader *crdev,
equivalent_cmyk_color_params *op_equiv_cmyk_colors)
{
int code;
cmd_block cb;
code = clist_find_pseudoband(crdev, crdev->nbands + SPOT_EQUIV_COLORS - 1, &cb);
if (code < 0)
return code;
code = clist_read_chunk(crdev, cb.pos, sizeof(equivalent_cmyk_color_params),
(unsigned char *)op_equiv_cmyk_colors);
return code;
}
/* Unserialize the icc table information stored in the cfile and
place it in the reader device */
static int
clist_unserialize_icctable(gx_device_clist_reader *crdev, cmd_block *cb)
{
clist_file_ptr cfile = crdev->page_info.cfile;
clist_icctable_t *icc_table = crdev->icc_table;
int64_t save_pos;
int number_entries, size_data;
unsigned char *buf, *buf_start;
clist_icctable_entry_t *curr_entry;
int k;
gs_memory_t *stable_mem = crdev->memory->stable_memory;
if ( icc_table != NULL )
return(0);
save_pos = crdev->page_info.io_procs->ftell(cfile);
crdev->page_info.io_procs->fseek(cfile, cb->pos, SEEK_SET, crdev->page_info.cfname);
/* First four bytes tell us the number of entries. */
crdev->page_info.io_procs->fread_chars(&number_entries, sizeof(number_entries), cfile);
/* Allocate the space */
size_data = number_entries*sizeof(clist_icc_serial_entry_t);
buf = gs_alloc_bytes(crdev->memory, size_data, "clist_read_icctable");
buf_start = buf;
if (buf == NULL)
return gs_rethrow(-1, "insufficient memory for icc table buffer reader");
/* Get the data */
clist_read_chunk(crdev, cb->pos + 4, size_data, buf);
icc_table = gs_alloc_struct(stable_mem, clist_icctable_t,
&st_clist_icctable, "clist_read_icctable");
if (icc_table == NULL) {
gs_free_object(stable_mem, buf_start, "clist_read_icctable");
return gs_rethrow(-1, "insufficient memory for icc table buffer reader");
}
icc_table->memory = stable_mem;
icc_table->head = NULL;
icc_table->final = NULL;
/* Allocate and fill each entry */
icc_table->tablesize = number_entries;
crdev->icc_table = icc_table;
for (k = 0; k < number_entries; k++) {
curr_entry = gs_alloc_struct(stable_mem, clist_icctable_entry_t,
&st_clist_icctable_entry, "clist_read_icctable");
if (curr_entry == NULL) {
gs_free_object(stable_mem, buf_start, "clist_read_icctable");
return gs_rethrow(-1, "insufficient memory for icc table entry");
}
memcpy(&(curr_entry->serial_data), buf, sizeof(clist_icc_serial_entry_t));
buf += sizeof(clist_icc_serial_entry_t);
curr_entry->icc_profile = NULL;
if ( icc_table->head == NULL ) {
icc_table->head = curr_entry;
icc_table->final = curr_entry;
} else {
icc_table->final->next = curr_entry;
icc_table->final = curr_entry;
}
curr_entry->next = NULL;
}
gs_free_object(crdev->memory, buf_start, "clist_read_icctable");
crdev->page_info.io_procs->fseek(cfile, save_pos, SEEK_SET, crdev->page_info.cfname);
return 0;
}
/* Get the ICC profile table information from the clist */
int
clist_read_icctable(gx_device_clist_reader *crdev)
{
/* Look for the command block of the ICC Profile. */
cmd_block cb;
int code;
/* First get the command block which will tell us where the
information is stored in the cfile */
code = clist_find_pseudoband(crdev, crdev->nbands + ICC_TABLE_OFFSET - 1, &cb);
if (code < 0)
return(0); /* No ICC information */
/* Unserialize the icc_table from the cfile */
code = clist_unserialize_icctable(crdev, &cb);
return(code);
}
/* Initialize for reading. */
int
clist_render_init(gx_device_clist *dev)
{
gx_device_clist_reader * const crdev = &dev->reader;
crdev->ymin = crdev->ymax = 0;
crdev->yplane.index = -1;
/* For normal rasterizing, pages and num_pages is 1. */
crdev->pages = 0;
crdev->num_pages = 1; /* always at least one page */
crdev->offset_map = NULL;
crdev->icc_table = NULL;
crdev->color_usage_array = NULL;
crdev->render_threads = NULL;
return 0;
}
/* Copy a rasterized rectangle to the client, rasterizing if needed. */
int
clist_get_bits_rectangle(gx_device *dev, const gs_int_rect * prect,
gs_get_bits_params_t *params)
{
gx_device_clist *cldev = (gx_device_clist *)dev;
gx_device_clist_reader *crdev = &cldev->reader;
gx_device_clist_common *cdev = (gx_device_clist_common *)dev;
gs_get_bits_options_t options = params->options;
int y = prect->p.y;
int end_y = prect->q.y;
int line_count = end_y - y;
gs_int_rect band_rect;
int lines_rasterized;
gx_device *bdev;
uint num_planes =
(options & GB_PACKING_CHUNKY ? 1 :
options & GB_PACKING_PLANAR ? dev->color_info.num_components :
options & GB_PACKING_BIT_PLANAR ? dev->color_info.depth :
0 /****** NOT POSSIBLE ******/);
gx_render_plane_t render_plane;
int plane_index;
int my;
int code;
if (prect->p.x < 0 || prect->q.x > dev->width ||
y < 0 || end_y > dev->height
)
return_error(gs_error_rangecheck);
if (line_count <= 0 || prect->p.x >= prect->q.x)
return 0;
/*
* Calculate the render_plane from the params. There are two cases:
* full pixels, or a single plane.
*/
plane_index = -1;
if (options & GB_SELECT_PLANES) {
/* Look for the one selected plane. */
int i;
for (i = 0; i < num_planes; ++i)
if (params->data[i]) {
if (plane_index >= 0) /* >1 plane requested */
return gx_default_get_bits_rectangle(dev, prect, params);
plane_index = i;
}
}
if (0 > (code = clist_close_writer_and_init_reader(cldev)))
return code;
clist_select_render_plane(dev, y, line_count, &render_plane, plane_index);
code = gdev_create_buf_device(cdev->buf_procs.create_buf_device,
&bdev, cdev->target, y, &render_plane,
dev->memory,
&(crdev->color_usage_array[y/crdev->page_band_height]));
if (code < 0)
return code;
code = clist_rasterize_lines(dev, y, line_count, bdev, &render_plane, &my);
if (code >= 0) {
lines_rasterized = min(code, line_count);
/* Return as much of the rectangle as falls within the rasterized lines. */
band_rect = *prect;
band_rect.p.y = my;
band_rect.q.y = my + lines_rasterized;
code = dev_proc(bdev, get_bits_rectangle)
(bdev, &band_rect, params);
}
cdev->buf_procs.destroy_buf_device(bdev);
if (code < 0 || lines_rasterized == line_count)
return code;
/*
* We'll have to return the rectangle in pieces. Force GB_RETURN_COPY
* rather than GB_RETURN_POINTER, and require all subsequent pieces to
* use the same values as the first piece for all of the other format
* options. If copying isn't allowed, or if there are any unread
* rectangles, punt.
*/
if (!(options & GB_RETURN_COPY) || code > 0)
return gx_default_get_bits_rectangle(dev, prect, params);
options = params->options;
if (!(options & GB_RETURN_COPY)) {
/* Redo the first piece with copying. */
params->options = options =
(params->options & ~GB_RETURN_ALL) | GB_RETURN_COPY;
lines_rasterized = 0;
}
{
gs_get_bits_params_t band_params;
uint raster = gx_device_raster(bdev, true);
code = gdev_create_buf_device(cdev->buf_procs.create_buf_device,
&bdev, cdev->target, y, &render_plane,
dev->memory,
&(crdev->color_usage_array[y/crdev->page_band_height]));
if (code < 0)
return code;
band_params = *params;
while ((y += lines_rasterized) < end_y) {
int i;
/* Increment data pointers by lines_rasterized. */
for (i = 0; i < num_planes; ++i)
if (band_params.data[i])
band_params.data[i] += raster * lines_rasterized;
line_count = end_y - y;
code = clist_rasterize_lines(dev, y, line_count, bdev,
&render_plane, &my);
if (code < 0)
break;
lines_rasterized = min(code, line_count);
band_rect.p.y = my;
band_rect.q.y = my + lines_rasterized;
code = dev_proc(bdev, get_bits_rectangle)
(bdev, &band_rect, &band_params);
if (code < 0)
break;
params->options = options = band_params.options;
if (lines_rasterized == line_count)
break;
}
cdev->buf_procs.destroy_buf_device(bdev);
}
return code;
}
/* Copy scan lines to the client. This is where rendering gets done. */
/* Processes min(requested # lines, # lines available thru end of band) */
int /* returns -ve error code, or # scan lines copied */
clist_rasterize_lines(gx_device *dev, int y, int line_count,
gx_device *bdev, const gx_render_plane_t *render_plane,
int *pmy)
{
gx_device_clist * const cldev = (gx_device_clist *)dev;
gx_device_clist_reader * const crdev = &cldev->reader;
gx_device *target = crdev->target;
uint raster = clist_plane_raster(target, render_plane);
byte *mdata = crdev->data + crdev->page_tile_cache_size;
byte *mlines = (crdev->page_line_ptrs_offset == 0 ? NULL : mdata + crdev->page_line_ptrs_offset);
int plane_index = (render_plane ? render_plane->index : -1);
int code;
/* Render a band if necessary, and copy it incrementally. */
if (crdev->ymin < 0 || crdev->yplane.index != plane_index ||
!(y >= crdev->ymin && y < crdev->ymax)
) {
int band_height = crdev->page_band_height;
int band = y / band_height;
int band_begin_line = band * band_height;
int band_end_line = band_begin_line + band_height;
int band_num_lines;
gs_int_rect band_rect;
if (band_end_line > dev->height)
band_end_line = dev->height;
/* Clip line_count to current band */
if (line_count > band_end_line - y)
line_count = band_end_line - y;
band_num_lines = band_end_line - band_begin_line;
if (y < 0 || y > dev->height)
return_error(gs_error_rangecheck);
code = crdev->buf_procs.setup_buf_device
(bdev, mdata, raster, (byte **)mlines, 0, band_num_lines, band_num_lines);
band_rect.p.x = 0;
band_rect.p.y = band_begin_line;
band_rect.q.x = dev->width;
band_rect.q.y = band_end_line;
if (code >= 0)
code = clist_render_rectangle(cldev, &band_rect, bdev, render_plane,
true);
/* Reset the band boundaries now, so that we don't get */
/* an infinite loop. */
crdev->ymin = band_begin_line;
crdev->ymax = band_end_line;
crdev->offset_map = NULL;
if (code < 0)
return code;
}
if (line_count > crdev->ymax - y)
line_count = crdev->ymax - y;
code = crdev->buf_procs.setup_buf_device
(bdev, mdata, raster, (byte **)mlines, y - crdev->ymin, line_count,
crdev->ymax - crdev->ymin);
if (code < 0)
return code;
*pmy = 0;
return line_count;
}
/*
* Render a rectangle to a client-supplied device. There is no necessary
* relationship between band boundaries and the region being rendered.
*/
int
clist_render_rectangle(gx_device_clist *cldev, const gs_int_rect *prect,
gx_device *bdev,
const gx_render_plane_t *render_plane, bool clear)
{
gx_device_clist_reader * const crdev = &cldev->reader;
const gx_placed_page *ppages;
int num_pages = crdev->num_pages;
int band_height = crdev->page_band_height;
int band_first = prect->p.y / band_height;
int band_last = (prect->q.y - 1) / band_height;
gx_band_page_info_t *pinfo;
gx_band_page_info_t page_info;
int code = 0;
int i;
bool save_pageneutralcolor;
if (render_plane)
crdev->yplane = *render_plane;
else
crdev->yplane.index = -1;
if_debug2m('l', bdev->memory, "[l]rendering bands (%d,%d)\n", band_first, band_last);
ppages = crdev->pages;
/* Before playing back the clist, make sure that the gray detection is disabled */
/* so we don't slow down the rendering (primarily high level images). */
save_pageneutralcolor = crdev->icc_struct->pageneutralcolor;
crdev->icc_struct->pageneutralcolor = false;
for (i = 0; i < num_pages && code >= 0; ++i) {
bool pdf14_needed = false;
int band;
if (ppages == NULL) {
/*
* If we aren't rendering saved pages, do the current one.
* Note that this is the only case in which we may encounter
* a gx_saved_page with non-zero cfile or bfile.
*/
bdev->band_offset_x = 0;
bdev->band_offset_y = band_first * (long)band_height;
pinfo = &(crdev->page_info);
} else {
const gx_placed_page *ppage = &ppages[i];
/* Store the page information. */
page_info.cfile = page_info.bfile = NULL;
strncpy(page_info.cfname, ppage->page->cfname, sizeof(page_info.cfname)-1);
strncpy(page_info.bfname, ppage->page->bfname, sizeof(page_info.bfname)-1);
page_info.io_procs = ppage->page->io_procs;
page_info.tile_cache_size = ppage->page->tile_cache_size;
page_info.bfile_end_pos = ppage->page->bfile_end_pos;
page_info.band_params = ppage->page->band_params;
page_info.line_ptrs_offset = 0;
pinfo = &page_info;
/*
* Set the band_offset_? values in case the buffer device
* needs this. Example, a device may need to adjust the
* phase of the dithering based on the page position, NOT
* the position within the band buffer to avoid band stitch
* lines in the dither pattern. The old wtsimdi device did this
*
* The band_offset_x is not important for placed pages that
* are nested on a 'master' page (imposition) since each
* page expects to be dithered independently, but setting
* this allows pages to be contiguous without a dithering
* shift.
*
* The following sets the band_offset_? relative to the
* master page.
*/
bdev->band_offset_x = ppage->offset.x;
bdev->band_offset_y = ppage->offset.y + (band_first * band_height);
}
/* if any of the requested bands need transparency, use it for all of them */
/* The pdf14_ok_to_optimize checks if the target device (bdev) is compatible */
/* with the pdf14 compositor info that was written to the clist: colorspace, */
/* colorspace, etc. */
pdf14_needed = !pdf14_ok_to_optimize(bdev);
for (band=band_first; !pdf14_needed && band <= band_last; band++)
pdf14_needed |= (crdev->color_usage_array[band].trans_bbox.p.y <=
crdev->color_usage_array[band].trans_bbox.q.y) ? true : false;
code = clist_playback_file_bands(pdf14_needed ?
playback_action_render : playback_action_render_no_pdf14,
crdev, pinfo,
bdev, band_first, band_last,
prect->p.x - bdev->band_offset_x,
prect->p.y);
}
crdev->icc_struct->pageneutralcolor = save_pageneutralcolor; /* restore it */
return code;
}
/* Playback the band file, taking the indicated action w/ its contents. */
int
clist_playback_file_bands(clist_playback_action action,
gx_device_clist_reader *crdev,
gx_band_page_info_t *page_info, gx_device *target,
int band_first, int band_last, int x0, int y0)
{
int code = 0;
bool opened_bfile = false;
bool opened_cfile = false;
/* We have to pick some allocator for rendering.... */
gs_memory_t *mem =crdev->memory;
stream_band_read_state rs;
/* setup stream */
s_init_state((stream_state *)&rs, &s_band_read_template,
(gs_memory_t *)0); /* Not mem, as we don't want to free rs */
rs.band_first = band_first;
rs.band_last = band_last;
rs.page_info = *page_info;
rs.local_memory = mem;
/* If this is a saved page, open the files. */
if (rs.page_cfile == 0) {
code = crdev->page_info.io_procs->fopen(rs.page_cfname,
gp_fmode_rb, &rs.page_cfile, crdev->bandlist_memory,
crdev->bandlist_memory, true);
opened_cfile = (code >= 0);
}
if (rs.page_bfile == 0 && code >= 0) {
code = crdev->page_info.io_procs->fopen(rs.page_bfname,
gp_fmode_rb, &rs.page_bfile, crdev->bandlist_memory,
crdev->bandlist_memory, false);
opened_bfile = (code >= 0);
}
if (rs.page_cfile != 0 && rs.page_bfile != 0) {
stream s;
byte sbuf[cbuf_size];
static const stream_procs no_procs = {
s_std_noavailable, s_std_noseek, s_std_read_reset,
s_std_read_flush, s_std_close, s_band_read_process
};
s_band_read_init((stream_state *)&rs);
# ifdef DEBUG
s_band_read_init_offset_map(crdev, (stream_state *)&rs);
# endif
/* The stream doesn't need a memory, but we'll need to access s.memory->gs_lib_ctx. */
s_init(&s, mem);
s_std_init(&s, sbuf, cbuf_size, &no_procs, s_mode_read);
s.foreign = 1;
s.state = (stream_state *)&rs;
code = clist_playback_band(action, crdev, &s, target, x0, y0, mem);
# ifdef DEBUG
s_band_read_dnit_offset_map(crdev, (stream_state *)&rs);
# endif
}
/* Close the files if we just opened them. */
if (opened_bfile && rs.page_bfile != 0)
crdev->page_info.io_procs->fclose(rs.page_bfile, rs.page_bfname, false);
if (opened_cfile && rs.page_cfile != 0)
crdev->page_info.io_procs->fclose(rs.page_cfile, rs.page_cfname, false);
return code;
}
|