summaryrefslogtreecommitdiff
blob: 194386855aa9e679af4392c1531cf7b682b96421 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
/* Copyright (C) 2001-2021 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.
*/


/* Font resource writing for pdfwrite text */
#include "memory_.h"
#include "gx.h"
#include "gserrors.h"
#include "gxfcmap.h"
#include "gxfont.h"
#include "gxfcopy.h"
#include "gscencs.h"
#include "gdevpsf.h"
#include "gdevpdfx.h"
#include "gdevpdfo.h"		/* for object->written */
#include "gdevpdtd.h"		/* for writing FontDescriptor */
#include "gdevpdtf.h"
#include "gdevpdti.h"		/* for writing bitmap fonts Encoding */
#include "gdevpdtw.h"
#include "gdevpdtv.h"
#include "sarc4.h"

static const char *const encoding_names[] = {
    KNOWN_REAL_ENCODING_NAMES
};

/* ================ Font resource writing ================ */

/* ---------------- Private ---------------- */

/* Write the Widths for a font. */
static int
pdf_write_Widths(gx_device_pdf *pdev, int first, int last, const double *widths)
{
    stream *s = pdev->strm;
    int i;

    if (first > last)
        first = last = 0;
    pprintd2(s, "/FirstChar %d/LastChar %d/Widths[", first, last);
    for (i = first; i <= last; ++i)
        pprintg1(s, (i & 15 ? " %g" : "\n%g"), psdf_round(widths[i], 100, 10));
    stream_puts(s, "]\n");
    return 0;
}

/* Check strings equality. */
static bool
strings_equal(const gs_const_string *str0, const gs_const_string *str1)
{
    return str0->size == str1->size &&
           !memcmp(str0->data, str1->data, str0->size);
}

/* Check if an encoding element differs from a standard one. */
static int
pdf_different_encoding_element(const pdf_font_resource_t *pdfont, int ch, int encoding_index)
{
    if (pdfont->u.simple.Encoding[ch].is_difference)
        return 1;
    else if (encoding_index != ENCODING_INDEX_UNKNOWN) {
        gs_glyph glyph0 = gs_c_known_encode(ch, encoding_index);
        gs_glyph glyph1 = pdfont->u.simple.Encoding[ch].glyph;
        gs_const_string str;
        int code = gs_c_glyph_name(glyph0, &str);

        if (code < 0)
            return code; /* Must not happen */
        if (glyph1 != GS_NO_GLYPH)
            if (!strings_equal(&str, &pdfont->u.simple.Encoding[ch].str))
                return 1;
    }
    return 0;
}

/* Find an index of a different encoding element. */
int
pdf_different_encoding_index(const pdf_font_resource_t *pdfont, int ch0)
{
    gs_encoding_index_t base_encoding = pdfont->u.simple.BaseEncoding;
    int ch, code;

    for (ch = ch0; ch < 256; ++ch) {
        code = pdf_different_encoding_element(pdfont, ch, base_encoding);
        if (code < 0)
            return code; /* Must not happen */
        if (code)
            break;
    }
    return ch;
}

/* Check for unknown encode (simple fonts only). */
static bool
pdf_simple_font_needs_ToUnicode(const pdf_font_resource_t *pdfont)
{
    int ch;
    unsigned char mask = (pdfont->FontType == ft_encrypted || pdfont->FontType == ft_encrypted2
                ? GS_C_PDF_GOOD_GLYPH_MASK : GS_C_PDF_GOOD_NON_SYMBOL_MASK);

    if (pdfont->u.simple.Encoding == NULL)
        return true; /* Bitmap Type 3 fonts have no pdfont->u.simple.Encoding . */
    if (pdfont->FontType == ft_TrueType)
        /*
            TrueType fonts are always written as symbolic, and so they do not have
            an Encoding entry (SVN revision 11735, bugs #690744, #691036, #691319).
            In this circumstance, write the ToUnicode map to get a searchable PDF.
        */
        return true;
    if (!pdfont->TwoByteToUnicode)
        return true;

    for (ch = 0; ch < 256; ++ch) {
        pdf_encoding_element_t *pet = &pdfont->u.simple.Encoding[ch];
        gs_glyph glyph = pet->glyph;

        if (glyph == GS_NO_GLYPH)
            continue;
        if (glyph < gs_c_min_std_encoding_glyph || glyph >= GS_MIN_CID_GLYPH) {
            if (pet->str.size == 0)
                return true;
            glyph = gs_c_name_glyph(pet->str.data, pet->str.size);
            if (glyph == GS_NO_GLYPH)
                return true;
        }
        glyph -= gs_c_min_std_encoding_glyph;
        if( glyph > GS_C_PDF_MAX_GOOD_GLYPH ||
           !(gs_c_pdf_glyph_type[glyph >> 2] & (mask << (( glyph & 3 )<<1) )))
          return true;

    }
    return false;
}

/* Write Encoding differencrs. */
int
pdf_write_encoding(gx_device_pdf *pdev, const pdf_font_resource_t *pdfont, long id, int ch)
{
    /* Note : this truncates extended glyph names to original names. */
    stream *s;
    gs_encoding_index_t base_encoding = pdfont->u.simple.BaseEncoding;
    const int sl = strlen(gx_extendeg_glyph_name_separator);
    int prev = 256, code, cnt = 0;

    pdf_open_separate(pdev, id, resourceEncoding);
    s = pdev->strm;
    stream_puts(s, "<</Type/Encoding");
    if (base_encoding < 0 && pdev->ForOPDFRead)
        base_encoding = ENCODING_INDEX_STANDARD;
    if (base_encoding > 0)
        pprints1(s, "/BaseEncoding/%s", encoding_names[base_encoding]);
    stream_puts(s, "/Differences[");
    for (; ch < 256; ++ch) {
        code = pdf_different_encoding_element(pdfont, ch, base_encoding);
        if (code < 0)
            return code; /* Must not happen */
        if (code == 0 && (pdfont->FontType == ft_user_defined ||
            pdfont->FontType == ft_PCL_user_defined ||
            pdfont->FontType == ft_MicroType ||
            pdfont->FontType == ft_GL2_stick_user_defined ||
            pdfont->FontType == ft_GL2_531)) {
            /* PDF 1.4 spec Appendix H Note 42 says that
             * Acrobat 4 can't properly handle Base Encoding.
             * Enforce writing differences against that.
             */
            if (pdfont->used[ch >> 3] & 0x80 >> (ch & 7))
                if (pdfont->u.simple.Encoding[ch].str.size)
                    code = 1;
        }
        if (code) {
            const byte *d = pdfont->u.simple.Encoding[ch].str.data;
            int i, l = pdfont->u.simple.Encoding[ch].str.size;

            if (pdev->HavePDFWidths) {
                for (i = 0; i + sl < l; i++)
                    if (!memcmp(d + i, gx_extendeg_glyph_name_separator, sl)) {
                        l = i;
                        break;
                    }
            }
            if (ch != prev + 1) {
                pprintd1(s, "\n%d", ch);
                cnt = 1;
            } else if (!(cnt++ & 15))
                stream_puts(s, "\n");
            pdf_put_name(pdev, d, l);
            prev = ch;
        }
    }
    stream_puts(s, "]>>\n");
    pdf_end_separate(pdev, resourceEncoding);
    return 0;
}

/* Write Encoding reference. */
int
pdf_write_encoding_ref(gx_device_pdf *pdev,
          const pdf_font_resource_t *pdfont, long id)
{
    stream *s = pdev->strm;

    if (id != 0) {
        pprintld1(s, "/Encoding %ld 0 R", id);
        pdf_record_usage_by_parent(pdev, id, pdfont->object->id);
    }
    else if (pdfont->u.simple.BaseEncoding > 0) {
        gs_encoding_index_t base_encoding = pdfont->u.simple.BaseEncoding;
        pprints1(s, "/Encoding/%s", encoding_names[base_encoding]);
    }
    return 0;
}

/* Write the Subtype and Encoding for a simple font. */
static int
pdf_write_simple_contents(gx_device_pdf *pdev,
                          const pdf_font_resource_t *pdfont)
{
    stream *s = pdev->strm;
    long diff_id = 0;
    int ch = (pdfont->u.simple.Encoding ? 0 : 256);
    int code = 0;

    ch = pdf_different_encoding_index(pdfont, ch);
    if (ch < 256)
        diff_id = pdf_obj_ref(pdev);
    code = pdf_write_encoding_ref(pdev, pdfont, diff_id);
    if (code < 0)
        return code;
    pprints1(s, "/Subtype/%s>>\n",
             (pdfont->FontType == ft_TrueType ? "TrueType" :
              pdfont->u.simple.s.type1.is_MM_instance ? "MMType1" : "Type1"));
    pdf_end_separate(pdev, resourceFont);
    if (diff_id) {
        mark_font_descriptor_symbolic(pdfont);
        code = pdf_write_encoding(pdev, pdfont, diff_id, ch);
        if (code < 0)
            return code;
    }
    return 0;
}

/*
 * Write the W[2] entries for a CIDFont.  *pdfont is known to be a
 * CIDFont (type 0 or 2).
 */
static bool
pdf_compute_CIDFont_default_widths(const pdf_font_resource_t *pdfont, int wmode, int *pdw, int *pdv)
{
    psf_glyph_enum_t genum;
    gs_glyph glyph;
    ushort counts[1500]; /* Some CID fonts use vertical widths 1026 .*/
    int dw_count = 0, i, dwi = 0, neg_count = 0, pos_count = 0;
    double *w = (wmode ? pdfont->u.cidfont.Widths2 : pdfont->Widths);

    /* We don't wont to scan for both negative and positive widths,
     * to save the C stack space.
     * Doubtly they both are used in same font.
     * So just count positive and negative widths separately
     * and use the corresponding sign.
     * fixme : implement 2 hystograms.
     */
    psf_enumerate_bits_begin(&genum, NULL,
                             wmode ? pdfont->u.cidfont.used2 : pdfont->used,
                             pdfont->count, GLYPH_SPACE_INDEX);
    memset(counts, 0, sizeof(counts));
    while (!psf_enumerate_glyphs_next(&genum, &glyph)) {
        int i = glyph - GS_MIN_CID_GLYPH;

        if ( i < pdfont->count) { /* safety */
            int width = (int)(w[i] + 0.5);

            counts[min(any_abs(width), countof(counts) - 1)]++;
            if (width > 0)
                pos_count++;
            else if (width < 0)
                neg_count++;
        }
    }
    for (i = 1; i < countof(counts); ++i)
        if (counts[i] > dw_count)
            dwi = i, dw_count = counts[i];
    *pdw = (neg_count > pos_count ? -dwi : dwi);
    *pdv = 0;
    if (wmode) {
        psf_enumerate_glyphs_reset(&genum);
        while (!psf_enumerate_glyphs_next(&genum, &glyph)) {
            int i = glyph - GS_MIN_CID_GLYPH;

            if ( i < pdfont->count) { /* safety */
                int width = (int)(w[i] + 0.5);

                if (min(any_abs(width), countof(counts) - 1) == any_abs(dwi)) {
                    *pdv = (int)(pdfont->u.cidfont.v[i * 2 + 1] + 0.5);
                    break;
                }
            }
        }
    }
    return (dw_count + counts[0] > 0);
}

/*
 * Write the [D]W[2] entries for a CIDFont.  *pdfont is known to be a
 * CIDFont (type 0 or 2).
 */
static int
pdf_write_CIDFont_widths(gx_device_pdf *pdev,
                         const pdf_font_resource_t *pdfont, int wmode)
{
    /*
     * The values of the CIDFont width keys are as follows:
     *   DW = w (default 0)
     *   W = [{c [w ...] | cfirst clast w}*]
     *   DW2 = [vy w1y] (default [880 -1000])
     *   W2 = [{c [w1y vx vy ...] | cfirst clast w1y vx vy}*]
     */
    stream *s = pdev->strm;
    psf_glyph_enum_t genum;
    gs_glyph glyph;
    int dw = 0, dv = 0, prev = -2;
    const char *Widths_key = (wmode ? "/W2" : "/W");
    double *w = (wmode ? pdfont->u.cidfont.Widths2 : pdfont->Widths);

    /* Compute and write default width : */
    if (pdf_compute_CIDFont_default_widths(pdfont, wmode, &dw, &dv)) {
        if (wmode) {
            pprintd2(s, "/DW2 [%d %d]\n", dv, dw);
        } else
            pprintd1(s, "/DW %d\n", dw);
    }

    /*
     * Now write all widths different from the default one.  Currently we make no
     * attempt to optimize this: we write every width individually.
     */
    psf_enumerate_bits_begin(&genum, NULL,
                             wmode ? pdfont->u.cidfont.used2 : pdfont->used,
                             pdfont->count, GLYPH_SPACE_INDEX);
    {
        while (!psf_enumerate_glyphs_next(&genum, &glyph)) {
            int cid = glyph - GS_MIN_CID_GLYPH;
            int width = (int)(w[cid] + 0.5);

      /* Must write zero widths - see test file of the bug Bug 687681. */
      /* We don't enumerate unused glyphs here due to pdfont->used. */
      /* if (width == 0)
                continue; */ /* Don't write for unused glyphs. */
            {	/* Check whether copied font really have this glyph.
                   debugged with 401-01.ps, which uses undefined CIDs. */
                gs_font_base *pfont = pdf_font_resource_font(pdfont, false);
                gs_glyph_info_t info;

                if (pfont->FontType == ft_TrueType) {
                    /* We're converting a Type 42 into CIDFontType2. */
                    /* We know that CIDs equal to char codes. */
                    gs_glyph glyph1;
                    int ch = glyph & 0xff;

                    glyph1 = pfont->procs.encode_char((gs_font *)pfont, ch, GLYPH_SPACE_NAME);
                    if (cid == 0 && glyph1 == GS_NO_GLYPH)
                        glyph1 = copied_get_notdef((gs_font *)pdf_font_resource_font(pdfont, false));
                    if (glyph1 == GS_NO_GLYPH)
                        continue;
                    if (pfont->procs.glyph_info((gs_font *)pfont, glyph1, NULL, 0, &info) < 0)
                        continue;
                } else if (pfont->procs.glyph_info((gs_font *)pfont, glyph, NULL, 0, &info) < 0)
                    continue;
            }
            if (cid == prev + 1) {
                if (wmode) {
                    int vx = (int)(pdfont->u.cidfont.v[cid * 2 + 0] + 0.5);
                    int vy = (int)(pdfont->u.cidfont.v[cid * 2 + 1] + 0.5);

                    pprintd3(s, "\n%d %d %d", width, vx, vy);
                } else
                    pprintd1(s, "\n%d", width);
            } else if (pdev->PDFA == 0 && width == dw &&
                    (!wmode || (int)(pdfont->u.cidfont.v[cid * 2 + 0] + 0.5) ==
                                (int)(pdfont->Widths[cid] / 2 + 0.5)) &&
                    (!wmode || (int)(pdfont->u.cidfont.v[cid * 2 + 1] + 0.5) == dv))
                continue;
            else {
                if (prev >= 0)
                    stream_puts(s, "]\n");
                else {
                    stream_puts(s, Widths_key);
                    stream_puts(s, "[");
                }
                if (wmode) {
                    int vx = (int)(pdfont->u.cidfont.v[cid * 2 + 0] + 0.5);
                    int vy = (int)(pdfont->u.cidfont.v[cid * 2 + 1] + 0.5);

                    pprintd4(s, "%d[%d %d %d", cid, width, vx, vy);
                } else
                    pprintd2(s, "%d[%d", cid, width);
            }
            prev = cid;
        }
        if (prev >= 0)
            stream_puts(s, "]]\n");
    }

    return 0;
}

/* ---------------- Specific FontTypes ---------------- */

/* Write the contents of a Type 0 font resource. */
int
pdf_write_contents_type0(gx_device_pdf *pdev, pdf_font_resource_t *pdfont)
{
    stream *s = pdev->strm;

    /*
     * The Encoding name might be missing if an error occurred when
     * creating the font resource.
     */
    if (pdfont->u.type0.Encoding_name[0])
        pprints1(s, "/Encoding %s", pdfont->u.type0.Encoding_name);
    pprintld1(s, "/DescendantFonts[%ld 0 R]",
              pdf_font_id(pdfont->u.type0.DescendantFont));
    stream_puts(s, "/Subtype/Type0>>\n");
    pdf_end_separate(pdev, resourceFont);
    return 0;
}

/*
 * Finish writing the contents of a Type 3 font resource (FontBBox, Widths,
 * Subtype).
 */
int
pdf_finish_write_contents_type3(gx_device_pdf *pdev,
                                pdf_font_resource_t *pdfont)
{
    stream *s = pdev->strm;

    pdf_write_font_bbox_float(pdev, &pdfont->u.simple.s.type3.FontBBox);
    pdf_write_Widths(pdev, pdfont->u.simple.FirstChar,
                    pdfont->u.simple.LastChar, pdfont->Widths);
    stream_puts(s, "/Subtype/Type3>>\n");
    pdf_end_separate(pdev, resourceFont);
    return 0;
}

/* Write the contents of a standard (base 14) font resource. */
int
pdf_write_contents_std(gx_device_pdf *pdev, pdf_font_resource_t *pdfont)
{
    return pdf_write_simple_contents(pdev, pdfont);
}

/* Write the contents of a simple (Type 1 or Type 42) font resource. */
int
pdf_write_contents_simple(gx_device_pdf *pdev, pdf_font_resource_t *pdfont)
{
    pdf_write_Widths(pdev, pdfont->u.simple.FirstChar,
                     pdfont->u.simple.LastChar, pdfont->Widths);
    return pdf_write_simple_contents(pdev, pdfont);
}

/* Write the contents of a CIDFont resource. */
static int
write_contents_cid_common(gx_device_pdf *pdev, pdf_font_resource_t *pdfont,
                          int subtype)
{
    /* Write [D]W[2], CIDSystemInfo, and Subtype, and close the object. */
    stream *s = pdev->strm;
    int code;

    if (pdfont->Widths != 0) {
        code = pdf_write_CIDFont_widths(pdev, pdfont, 0);
        if (code < 0)
            return code;
    } else {
        /* With a vertical font, the viewer uses /DW
           to determine glyph width to compute its v-vector. */
        stream_puts(s, "/DW 0\n");
    }
    if (pdfont->u.cidfont.Widths2 != 0) {
        code = pdf_write_CIDFont_widths(pdev, pdfont, 1);
        if (code < 0)
            return code;
    }
    if (pdfont->u.cidfont.CIDSystemInfo_id)
        pprintld1(s, "/CIDSystemInfo %ld 0 R",
                  pdfont->u.cidfont.CIDSystemInfo_id);
    pprintd1(s, "/Subtype/CIDFontType%d>>\n", subtype);
    pdf_end_separate(pdev, resourceFont);
    return 0;
}
int
pdf_write_contents_cid0(gx_device_pdf *pdev, pdf_font_resource_t *pdfont)
{
    return write_contents_cid_common(pdev, pdfont, 0);
}
int
pdf_write_contents_cid2(gx_device_pdf *pdev, pdf_font_resource_t *pdfont)
{
    int count = pdfont->count;
    long map_id = 0;
    psf_glyph_enum_t genum;
    gs_glyph glyph;
    int code;

    /* Check for the identity CIDMap. */
    psf_enumerate_bits_begin(&genum, NULL, pdfont->used, count,
                             GLYPH_SPACE_INDEX);
    while (!psf_enumerate_glyphs_next(&genum, &glyph)) {
        int cid = glyph - GS_MIN_CID_GLYPH;
        int gid = pdfont->u.cidfont.CIDToGIDMap[cid];

        if (gid != cid) {	/* non-identity map */
            map_id = pdf_obj_ref(pdev);
            pprintld1(pdev->strm, "/CIDToGIDMap %ld 0 R\n", map_id);
            break;
        }
    }

    if (map_id == 0 && pdf_font_descriptor_embedding(pdfont->FontDescriptor)) {
        code = stream_puts(pdev->strm, "/CIDToGIDMap /Identity\n");
        if (code < 0)
            return code;
    }

    code = write_contents_cid_common(pdev, pdfont, 2);
    if (code < 0)
        return code;

    if (map_id && pdf_font_descriptor_embedding(pdfont->FontDescriptor)) {
        pdf_data_writer_t writer;
        int i;

        pdf_begin_data_stream(pdev, &writer,
            DATA_STREAM_BINARY | (pdev->CompressFonts ? DATA_STREAM_COMPRESS : 0),
                    /* Don't set DATA_STREAM_ENCRYPT since we write to a temporary file.
                       See comment in pdf_begin_encrypt. */
                    map_id);
        for (i = 0; i < pdfont->u.cidfont.CIDToGIDMapLength; ++i) {
            uint gid = pdfont->u.cidfont.CIDToGIDMap[i];

            stream_putc(writer.binary.strm, (byte)(gid >> 8));
            stream_putc(writer.binary.strm, (byte)(gid));
        }
        code = pdf_end_data(&writer);
    }
    return code;
}

/* ---------------- External entries ---------------- */

/* Write a font resource. */
static int
pdf_write_font_resource(gx_device_pdf *pdev, pdf_font_resource_t *pdfont)
{
    stream *s;
    cos_dict_t *pcd_Resources = NULL;
    char *base14_name = NULL;
    int id;

    if (pdfont->cmap_ToUnicode != NULL && pdfont->res_ToUnicode == NULL)
        if (pdfont->FontType == ft_composite ||
            ((pdfont->FontType == ft_encrypted || pdfont->FontType == ft_encrypted2 ||
                pdfont->FontType == ft_TrueType || pdfont->FontType == ft_user_defined ||
                pdfont->FontType == ft_GL2_stick_user_defined || pdfont->FontType == ft_PCL_user_defined ||
                pdfont->FontType == ft_MicroType || pdfont->FontType == ft_GL2_531) &&
                pdf_simple_font_needs_ToUnicode(pdfont))
           ) {
            pdf_resource_t *prcmap;
            int code = pdf_cmap_alloc(pdev, pdfont->cmap_ToUnicode, &prcmap, -1);

            if (code < 0)
                return code;
            pdfont->res_ToUnicode = prcmap;
        }
    if (pdev->CompatibilityLevel >= 1.2 &&
            (pdfont->FontType == ft_user_defined ||
            pdfont->FontType == ft_PCL_user_defined ||
            pdfont->FontType == ft_MicroType ||
            pdfont->FontType == ft_GL2_stick_user_defined ||
            pdfont->FontType == ft_GL2_531) &&
            pdfont->u.simple.s.type3.Resources != NULL &&
            pdfont->u.simple.s.type3.Resources->elements != NULL) {
        int code;

        pcd_Resources = pdfont->u.simple.s.type3.Resources;
        pcd_Resources->id = pdf_obj_ref(pdev);
        pdf_open_separate(pdev, pcd_Resources->id, resourceFont);
        code = COS_WRITE(pcd_Resources, pdev);
        if (code < 0)
            return code;
        pdf_end_separate(pdev, resourceFont);
    }
    pdf_open_separate(pdev, pdf_font_id(pdfont), resourceFont);
    s = pdev->strm;
    stream_puts(s, "<<");
    if (pdfont->BaseFont.size > 0) {
        stream_puts(s, "/BaseFont");
        if (pdfont->FontDescriptor && !pdf_font_descriptor_embedding(pdfont->FontDescriptor)
            && (base14_name = (char *)pdf_find_base14_name((byte *)pdfont->BaseFont.data, (unsigned int)pdfont->BaseFont.size)))
            pdf_put_name(pdev, (byte *)base14_name, (unsigned int)strlen(base14_name));
        else
            pdf_put_name(pdev, (byte *)pdfont->BaseFont.data, pdfont->BaseFont.size);
    }
    if (pdfont->FontDescriptor) {
        id = pdf_font_descriptor_id(pdfont->FontDescriptor);
        pprintld1(s, "/FontDescriptor %ld 0 R", id);
        if (pdev->Linearise) {
            pdf_set_font_descriptor_usage(pdev, pdfont->object->id, pdfont->FontDescriptor);
        }
    }
    if (pdfont->res_ToUnicode) {
        id = pdf_resource_id((const pdf_resource_t *)pdfont->res_ToUnicode);
        pprintld1(s, "/ToUnicode %ld 0 R", id);
        pdf_record_usage_by_parent(pdev, id, pdfont->object->id);
    }
    if (pdev->CompatibilityLevel > 1.0)
        stream_puts(s, "/Type/Font\n");
    else
        pprintld1(s, "/Type/Font/Name/R%ld\n", pdf_font_id(pdfont));
    if (pdev->ForOPDFRead && pdfont->global)
        stream_puts(s, "/.Global true\n");
    if (pcd_Resources != NULL) {
        id = pcd_Resources->id;
        pprintld1(s, "/Resources %ld 0 R\n", id);
        pdf_record_usage_by_parent(pdev, id, pdfont->object->id);
    }
    return pdfont->write_contents(pdev, pdfont);
}

/*
 * Close the text-related parts of a document, including writing out font
 * and related resources.
 */
int
write_font_resources(gx_device_pdf *pdev, pdf_resource_list_t *prlist)
{
    int j;
    pdf_resource_t *pres;

    for (j = 0; j < NUM_RESOURCE_CHAINS; ++j)
        for (pres = prlist->chains[j]; pres != 0; pres = pres->next) {
            pdf_font_resource_t *const pdfont = (pdf_font_resource_t *)pres;

            if (pdf_resource_id(pres) != -1) {
                int code = pdf_compute_BaseFont(pdev, pdfont, true);

                if (code < 0)
                    return code;
                code = pdf_write_font_resource(pdev, pdfont);
                if (code < 0)
                    return code;
                pdfont->object->written = true;
            }
        }
    return 0;
}
int
pdf_finish_resources(gx_device_pdf *pdev, pdf_resource_type_t type,
                        int (*finish_proc)(gx_device_pdf *,
                                           pdf_resource_t *))
{
    int j, ecode = 0;
    pdf_resource_t *pres;

    for (j = 0; j < NUM_RESOURCE_CHAINS; ++j)
        for (pres = pdev->resources[type].chains[j];
             pres != 0; pres = pres->next
             ) {
            int code = finish_proc(pdev, pres);

            if (code < 0)
                ecode = code;
        }
    return ecode;
}

/* ================ CMap resource writing ================ */

/*
 * Write the CIDSystemInfo for a CIDFont or a CMap.
 */
static int
pdf_write_cid_system_info_to_stream(gx_device_pdf *pdev, stream *s,
                          const gs_cid_system_info_t *pcidsi, gs_id object_id)
{
    byte *Registry, *Ordering;

    Registry = gs_alloc_bytes(pdev->pdf_memory, pcidsi->Registry.size, "temporary buffer for Registry");
    if (!Registry)
        return(gs_note_error(gs_error_VMerror));
    Ordering = gs_alloc_bytes(pdev->pdf_memory, pcidsi->Ordering.size, "temporary buffer for Registry");
    if (!Ordering) {
        gs_free_object(pdev->pdf_memory, Registry, "free temporary Registry buffer");
        return(gs_note_error(gs_error_VMerror));
    }
    memcpy(Registry, pcidsi->Registry.data, pcidsi->Registry.size);
    memcpy(Ordering, pcidsi->Ordering.data, pcidsi->Ordering.size);
    if (pdev->KeyLength && object_id != 0) {
        stream_arcfour_state sarc4;
        int code;

        code = pdf_encrypt_init(pdev, object_id, &sarc4);
        if (code < 0) {
            gs_free_object(pdev->pdf_memory, Registry, "free temporary Registry buffer");
            gs_free_object(pdev->pdf_memory, Ordering, "free temporary Ordering buffer");
            return(gs_note_error(code));
        }
        s_arcfour_process_buffer(&sarc4, Registry, pcidsi->Registry.size);
        code = pdf_encrypt_init(pdev, object_id, &sarc4);
        if (code < 0) {
            gs_free_object(pdev->pdf_memory, Registry, "free temporary Registry buffer");
            gs_free_object(pdev->pdf_memory, Ordering, "free temporary Ordering buffer");
            return(gs_note_error(code));
        }
        s_arcfour_process_buffer(&sarc4, Ordering, pcidsi->Ordering.size);
    }
    stream_puts(s, "<<\n/Registry");
    s_write_ps_string(s, Registry, pcidsi->Registry.size, PRINT_HEX_NOT_OK);
    stream_puts(s, "\n/Ordering");
    s_write_ps_string(s, Ordering, pcidsi->Ordering.size, PRINT_HEX_NOT_OK);
    pprintd1(s, "\n/Supplement %d\n>>\n", pcidsi->Supplement);
    gs_free_object(pdev->pdf_memory, Registry, "free temporary Registry buffer");
    gs_free_object(pdev->pdf_memory, Ordering, "free temporary Ordering buffer");
    return 0;
}

int
pdf_write_cid_system_info(gx_device_pdf *pdev,
                          const gs_cid_system_info_t *pcidsi, gs_id object_id)
{
    return pdf_write_cid_system_info_to_stream(pdev, pdev->strm, pcidsi, object_id);
}

int
pdf_write_cid_systemInfo_separate(gx_device_pdf *pdev, const gs_cid_system_info_t *pcidsi, long *id)
{
    int code;

    *id = pdf_begin_separate(pdev, resourceCIDSystemInfo);
    code = pdf_write_cid_system_info(pdev, pcidsi, *id);
    pdf_end_separate(pdev, resourceCIDSystemInfo);
    return code;
}

/*
 * Write a CMap resource.  We pass the CMap object as well as the resource,
 * because we write CMaps when they are created.
 */
int
pdf_write_cmap(gx_device_pdf *pdev, const gs_cmap_t *pcmap,
               pdf_resource_t **ppres /*CMap*/, int font_index_only)
{
    int code;
    pdf_data_writer_t writer;
    gs_const_string alt_cmap_name;
    const gs_const_string *cmap_name = &pcmap->CMapName;

    code = pdf_begin_data_stream(pdev, &writer,
                                 DATA_STREAM_NOT_BINARY |
                            /* Don't set DATA_STREAM_ENCRYPT since we write to a temporary file.
                               See comment in pdf_begin_encrypt. */
                                 (pdev->CompressFonts ?
                                  DATA_STREAM_COMPRESS : 0), gs_no_id);
    if (code < 0)
        return code;
    *ppres = writer.pres;
    writer.pres->where_used = 0; /* CMap isn't a PDF resource. */
    if (!pcmap->ToUnicode) {
        byte buf[200];
        cos_dict_t *pcd = (cos_dict_t *)writer.pres->object;
        stream s;

        code = cos_dict_put_c_key_int(pcd, "/WMode", pcmap->WMode);
        if (code < 0)
            return code;
        buf[0] = '/';
        memcpy(buf + 1, pcmap->CMapName.data, pcmap->CMapName.size);
        code = cos_dict_put_c_key_string(pcd, "/CMapName",
                        buf, pcmap->CMapName.size + 1);
        if (code < 0)
            return code;
        s_init(&s, pdev->memory);
        swrite_string(&s, buf, sizeof(buf));
        code = pdf_write_cid_system_info_to_stream(pdev, &s, pcmap->CIDSystemInfo, 0);
        if (code < 0)
            return code;
        code = cos_dict_put_c_key_string(pcd, "/CIDSystemInfo",
                        buf, stell(&s));
        if (code < 0)
            return code;
        code = cos_dict_put_string_copy(pcd, "/Type", "/CMap");
        if (code < 0)
            return code;
    }
    if (pcmap->CMapName.size == 0) {
        /* Create an arbitrary name (for ToUnicode CMap). */
        alt_cmap_name.data = (byte *)(*ppres)->rname;
        alt_cmap_name.size = strlen((*ppres)->rname);
        cmap_name = &alt_cmap_name;
    }
    code = psf_write_cmap(pdev->memory, writer.binary.strm, pcmap,
                          pdf_put_name_chars_proc(pdev),
                          cmap_name, font_index_only);
    if (code < 0)
        return code;
    code = pdf_end_data(&writer);
    if (code < 0)
        return code;
    return code;
}

static const char *OneByteIdentityH[] = {
    "/CIDInit /ProcSet findresource begin",
    "12 dict begin",
    "begincmap",
    "/CIDSystemInfo 3 dict dup begin",
      "/Registry (Adobe) def",
      "/Ordering (Identity) def",
      "/Supplement 0 def",
    "end def",
    "/CMapName /OneByteIdentityH def",
    "/CMapVersion 1.000 def",
    "/CMapType 1 def",
    "/UIDOffset 0 def",
    "/XUID [1 10 25404 9999] def",
    "/WMode 0 def",
    "1 begincodespacerange",
    "<00> <FF>",
    "endcodespacerange",
    "1 begincidrange",
    "<00> <FF> 0",
    "endcidrange",
    "endcmap",
    "CMapName currentdict /CMap defineresource pop",
    "end",
    "end",
NULL};

/*
 * Write OneByteIdentityH CMap.
 */
int
pdf_write_OneByteIdentityH(gx_device_pdf *pdev)
{
    int code, i;
    pdf_data_writer_t writer;
    cos_dict_t *pcd;
    char buf[200];
    static const gs_cid_system_info_t cidsi = {{(const byte *)"Adobe", 5}, {(const byte *)"Identity", 8}, 0};
    long id;

    if (pdev->IdentityCIDSystemInfo_id == gs_no_id) {
        code = pdf_write_cid_systemInfo_separate(pdev, &cidsi, &id);
        if (code < 0)
            return code;
        pdev->IdentityCIDSystemInfo_id = id;
    }
    if (pdev->OneByteIdentityH != NULL)
        return 0;
    code = pdf_begin_data_stream(pdev, &writer,
                                 DATA_STREAM_NOT_BINARY |
                            /* Don't set DATA_STREAM_ENCRYPT since we write to a temporary file.
                               See comment in pdf_begin_encrypt. */
                                 (pdev->CompressFonts ?
                                  DATA_STREAM_COMPRESS : 0), gs_no_id);
    if (code < 0)
        return code;
    pdev->OneByteIdentityH = writer.pres;
    pcd = (cos_dict_t *)writer.pres->object;
    code = cos_dict_put_string_copy(pcd, "/CMapName", "/OneByteIdentityH");
    if (code < 0)
        return code;
    gs_sprintf(buf, "%ld 0 R", pdev->IdentityCIDSystemInfo_id);
    code = cos_dict_put_string_copy(pcd, "/CIDSystemInfo", buf);
    if (code < 0)
        return code;
    code = cos_dict_put_string_copy(pcd, "/Type", "/CMap");
    if (code < 0)
        return code;
    for (i = 0; OneByteIdentityH[i]; i++) {
        stream_puts(pdev->strm, OneByteIdentityH[i]);
        stream_putc(pdev->strm, '\n');
    }
    return pdf_end_data(&writer);
}