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
|
/*
This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.
Copyright (C) 2002-2012 by Jin-Hwan Cho and Shunsaku Hirata,
the dvipdfmx project team.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
/* Based on dvipdfmx-0.13.2c */
#if HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H_ */
#include <string.h>
#include "system.h"
#include "error.h"
#include "mem.h"
#include "mfileio.h"
#include "sfnt.h"
#ifdef XETEX
UNSIGNED_BYTE
ft_unsigned_byte(sfnt* f)
{
unsigned char byte;
unsigned long length = 1;
if (FT_Load_Sfnt_Table(f->ft_face, 0, f->loc, &byte, &length) != 0)
ERROR("sfnt: Freetype failure...");
f->loc += 1;
return byte;
}
SIGNED_BYTE
ft_signed_byte(sfnt* f)
{
int b = ft_unsigned_byte(f);
if (b >= 0x80)
b -= 0x100;
return (SIGNED_BYTE)b;
}
UNSIGNED_PAIR
ft_unsigned_pair(sfnt* f)
{
unsigned char buf[2];
unsigned long length = 2;
if (FT_Load_Sfnt_Table(f->ft_face, 0, f->loc, buf, &length) != 0)
ERROR("sfnt: Freetype failure...");
f->loc += 2;
return (UNSIGNED_PAIR)((unsigned)buf[0] << 8) + buf[1];
}
SIGNED_PAIR
ft_signed_pair(sfnt* f)
{
int p = ft_unsigned_pair(f);
if (p >= 0x8000U)
p -= 0x10000U;
return (SIGNED_PAIR)p;
}
UNSIGNED_QUAD
ft_unsigned_quad(sfnt* f)
{
unsigned char buf[4];
unsigned long length = 4;
if (FT_Load_Sfnt_Table(f->ft_face, 0, f->loc, buf, &length) != 0)
ERROR("sfnt: Freetype failure...");
f->loc += 4;
return ((unsigned long)buf[0] << 24) + ((unsigned long)buf[1] << 16)
+ ((unsigned long)buf[2] << 8) + (unsigned long)buf[3];
}
unsigned long
ft_read(unsigned char* buf, unsigned long len, sfnt* f)
{
unsigned long length = len;
if (FT_Load_Sfnt_Table(f->ft_face, 0, f->loc, buf, &length) != 0)
ERROR("sfnt: Freetype failure...");
f->loc += len;
return length;
}
#endif
/*
* type:
* `true' (0x74727565): TrueType (Mac)
* `typ1' (0x74797031) (Mac): PostScript font housed in a sfnt wrapper
* 0x00010000: TrueType (Win)/OpenType
* `OTTO': PostScript CFF font with OpenType wrapper
* `ttcf': TrueType Collection
*/
#define SFNT_TRUETYPE 0x00010000UL
#define SFNT_MAC_TRUE 0x74727565UL
#define SFNT_OPENTYPE 0x00010000UL
#define SFNT_POSTSCRIPT 0x4f54544fUL
#define SFNT_TTC 0x74746366UL
#ifdef XETEX
sfnt *
sfnt_open (FT_Face face, int accept_types)
{
sfnt *sfont;
ULONG type;
if (!face || !FT_IS_SFNT(face))
return NULL;
sfont = NEW(1, sfnt);
sfont->ft_face = face;
sfont->type = 0;
sfont->loc = 0;
sfont->offset = 0;
type = sfnt_get_ulong(sfont);
if (type == SFNT_TRUETYPE || type == SFNT_MAC_TRUE) {
sfont->type = SFNT_TYPE_TRUETYPE;
} else if (type == SFNT_OPENTYPE) {
sfont->type = SFNT_TYPE_OPENTYPE;
} else if (type == SFNT_POSTSCRIPT) {
sfont->type = SFNT_TYPE_POSTSCRIPT;
} else if (type == SFNT_TTC) {
sfont->type = SFNT_TYPE_TTC;
}
if ((sfont->type & accept_types) == 0) {
RELEASE(sfont);
return NULL;
}
sfont->directory = NULL;
return sfont;
}
#else /* not XETEX */
sfnt *
sfnt_open (FILE *fp)
{
sfnt *sfont;
ULONG type;
ASSERT(fp);
rewind(fp);
sfont = NEW(1, sfnt);
sfont->stream = fp;
type = sfnt_get_ulong(sfont);
if (type == SFNT_TRUETYPE || type == SFNT_MAC_TRUE) {
sfont->type = SFNT_TYPE_TRUETYPE;
} else if (type == SFNT_OPENTYPE) {
sfont->type = SFNT_TYPE_OPENTYPE;
} else if (type == SFNT_POSTSCRIPT) {
sfont->type = SFNT_TYPE_POSTSCRIPT;
} else if (type == SFNT_TTC) {
sfont->type = SFNT_TYPE_TTC;
}
rewind(sfont->stream);
sfont->directory = NULL;
sfont->offset = 0UL;
return sfont;
}
sfnt *
dfont_open (FILE *fp, int index)
{
sfnt *sfont;
ULONG rdata_pos, map_pos, tags_pos, types_pos, res_pos, tag;
USHORT tags_num, types_num, i;
ASSERT(fp);
rewind(fp);
sfont = NEW(1, sfnt);
sfont->stream = fp;
rdata_pos = sfnt_get_ulong(sfont);
map_pos = sfnt_get_ulong(sfont);
sfnt_seek_set(sfont, map_pos + 0x18);
tags_pos = map_pos + sfnt_get_ushort(sfont);
sfnt_seek_set(sfont, tags_pos);
tags_num = sfnt_get_ushort(sfont);
for (i = 0; i <= tags_num; i++) {
tag = sfnt_get_ulong(sfont); /* tag name */
types_num = sfnt_get_ushort(sfont); /* typefaces number */
types_pos = tags_pos + sfnt_get_ushort(sfont); /* typefaces position */
if (tag == 0x73666e74UL) /* "sfnt" */
break;
}
if (i > tags_num) {
RELEASE(sfont);
return NULL;
}
sfnt_seek_set(sfont, types_pos);
if (index > types_num) {
ERROR("Invalid index %d for dfont.", index);
}
for (i = 0; i <= types_num; i++) {
(void) sfnt_get_ushort(sfont); /* resource id */
(void) sfnt_get_ushort(sfont); /* resource name position from name_list */
res_pos = sfnt_get_ulong(sfont); /* resource flag (byte) + resource offset */
sfnt_get_ulong(sfont); /* mbz */
if (i == index) break;
}
rewind(sfont->stream);
sfont->type = SFNT_TYPE_DFONT;
sfont->directory = NULL;
sfont->offset = (res_pos & 0x00ffffffUL) + rdata_pos + 4;
return sfont;
}
#endif
static void
release_directory (struct sfnt_table_directory *td)
{
long i;
if (td) {
if (td->tables) {
for (i = 0; i < td->num_tables; i++) {
if (td->tables[i].data)
RELEASE(td->tables[i].data);
}
RELEASE(td->tables);
}
if (td->flags)
RELEASE(td->flags);
RELEASE(td);
}
return;
}
void
sfnt_close (sfnt *sfont)
{
if (sfont) {
if (sfont->directory)
release_directory(sfont->directory);
RELEASE(sfont);
}
return;
}
int
put_big_endian (void *s, LONG q, int n)
{
int i;
char *p;
p = (char *) s;
for (i = n - 1; i >= 0; i--) {
p[i] = (char) (q & 0xff);
q >>= 8;
}
return n;
}
/* Convert four-byte number to big endianess
* in a machine independent way.
*/
static void
convert_tag (char *tag, unsigned long u_tag)
{
int i;
for (i = 3; i >= 0; i--) {
tag[i] = (char) (u_tag % 256);
u_tag /= 256;
}
return;
}
/*
* Computes the max power of 2 <= n
*/
static unsigned
max2floor (unsigned n)
{
int val = 1;
while (n > 1) {
n /= 2;
val *= 2;
}
return val;
}
/*
* Computes the log2 of the max power of 2 <= n
*/
static unsigned
log2floor (unsigned n)
{
unsigned val = 0;
while (n > 1) {
n /= 2;
val++;
}
return val;
}
static ULONG
sfnt_calc_checksum(void *data, ULONG length)
{
ULONG chksum = 0;
BYTE *p, *endptr;
int count = 0;
p = (BYTE *) data;
endptr = p + length;
while (p < endptr) {
chksum += (p[0] << (8 * ( 3 - count)));
count = ((count + 1) & 3);
p++;
}
return chksum;
}
static int
find_table_index (struct sfnt_table_directory *td, const char *tag)
{
int idx;
if (!td)
return -1;
for (idx = 0; idx < td->num_tables; idx++) {
if (!memcmp(td->tables[idx].tag, tag, 4))
return idx;
}
return -1;
}
void
sfnt_set_table (sfnt *sfont, const char *tag, void *data, ULONG length)
{
struct sfnt_table_directory *td;
int idx;
ASSERT(sfont);
td = sfont->directory;
idx = find_table_index(td, tag);
if (idx < 0) {
idx = td->num_tables;
td->num_tables++;
td->tables = RENEW(td->tables, td->num_tables, struct sfnt_table);
memcpy(td->tables[idx].tag, tag, 4);
}
td->tables[idx].check_sum = sfnt_calc_checksum(data, length);
td->tables[idx].offset = 0L;
td->tables[idx].length = length;
td->tables[idx].data = data;
return;
}
ULONG
sfnt_find_table_len (sfnt *sfont, const char *tag)
{
ULONG length;
struct sfnt_table_directory *td;
int idx;
ASSERT(sfont && tag);
td = sfont->directory;
idx = find_table_index(td, tag);
if (idx < 0)
length = 0;
else {
length = td->tables[idx].length;
}
return length;
}
ULONG
sfnt_find_table_pos (sfnt *sfont, const char *tag)
{
ULONG offset;
struct sfnt_table_directory *td;
int idx;
ASSERT(sfont && tag);
td = sfont->directory;
idx = find_table_index(td, tag);
if (idx < 0)
offset = 0;
else {
offset = td->tables[idx].offset;
}
return offset;
}
ULONG
sfnt_locate_table (sfnt *sfont, const char *tag)
{
ULONG offset;
ASSERT(sfont && tag);
offset = sfnt_find_table_pos(sfont, tag);
if (offset == 0)
ERROR("sfnt: table not found...");
sfnt_seek_set(sfont, offset);
return offset;
}
int
sfnt_read_table_directory (sfnt *sfont, ULONG offset)
{
struct sfnt_table_directory *td;
unsigned long i, u_tag;
ASSERT(sfont);
if (sfont->directory)
release_directory(sfont->directory);
sfont->directory = td = NEW (1, struct sfnt_table_directory);
#ifdef XETEX
ASSERT(sfont->ft_face);
#else
ASSERT(sfont->stream);
#endif
sfnt_seek_set(sfont, offset);
td->version = sfnt_get_ulong(sfont);
td->num_tables = sfnt_get_ushort(sfont);
td->search_range = sfnt_get_ushort(sfont);
td->entry_selector = sfnt_get_ushort(sfont);
td->range_shift = sfnt_get_ushort(sfont);
td->flags = NEW(td->num_tables, char);
td->tables = NEW(td->num_tables, struct sfnt_table);
for (i = 0; i < td->num_tables; i++) {
u_tag = sfnt_get_ulong(sfont);
convert_tag(td->tables[i].tag, u_tag);
td->tables[i].check_sum = sfnt_get_ulong(sfont);
td->tables[i].offset = sfnt_get_ulong(sfont) + sfont->offset;
td->tables[i].length = sfnt_get_ulong(sfont);
td->tables[i].data = NULL;
//fprintf(stderr, "[%4s:%x]", td->tables[i].tag, td->tables[i].offset);
td->flags[i] = 0;
}
td->num_kept_tables = 0;
return 0;
}
int
sfnt_require_table (sfnt *sfont, const char *tag, int must_exist)
{
struct sfnt_table_directory *td;
int idx;
ASSERT(sfont && sfont->directory);
td = sfont->directory;
idx = find_table_index(td, tag);
if (idx < 0) {
if (must_exist)
return -1;
} else {
td->flags[idx] |= SFNT_TABLE_REQUIRED;
td->num_kept_tables++;
}
return 0;
}
#include "pdfobj.h"
/*
* o All tables begin on four byte boundries, and pad any remaining space
* between tables with zeros
*
* o Entries in the Table Directory must be sorted in ascending order by tag
*
* o The head table contains checksum of the whole font file.
* To compute: first set it to 0, sum the entire font as ULONG,
* then store 0xB1B0AFBA - sum.
*/
static unsigned char wbuf[1024], padbytes[4] = {0, 0, 0, 0};
pdf_obj *
sfnt_create_FontFile_stream (sfnt *sfont)
{
pdf_obj *stream;
pdf_obj *stream_dict;
struct sfnt_table_directory *td;
long offset, nb_read, length;
int i, sr;
char *p;
ASSERT(sfont && sfont->directory);
stream = pdf_new_stream(STREAM_COMPRESS);
td = sfont->directory;
/* Header */
p = (char *) wbuf;
p += sfnt_put_ulong (p, td->version);
p += sfnt_put_ushort(p, td->num_kept_tables);
sr = max2floor(td->num_kept_tables) * 16;
p += sfnt_put_ushort(p, sr);
p += sfnt_put_ushort(p, log2floor(td->num_kept_tables));
p += sfnt_put_ushort(p, td->num_kept_tables * 16 - sr);
pdf_add_stream(stream, wbuf, 12);
/*
* Compute start of actual tables (after headers).
*/
offset = 12 + 16 * td->num_kept_tables;
for (i = 0; i < td->num_tables; i++) {
/* This table must exist in FontFile */
if (td->flags[i] & SFNT_TABLE_REQUIRED) {
if ((offset % 4) != 0) {
offset += 4 - (offset % 4);
}
p = (char *) wbuf;
memcpy(p, td->tables[i].tag, 4);
p += 4;
p += sfnt_put_ulong(p, td->tables[i].check_sum);
p += sfnt_put_ulong(p, offset);
p += sfnt_put_ulong(p, td->tables[i].length);
pdf_add_stream(stream, wbuf, 16);
offset += td->tables[i].length;
}
}
offset = 12 + 16 * td->num_kept_tables;
for (i = 0; i < td->num_tables; i++) {
if (td->flags[i] & SFNT_TABLE_REQUIRED) {
if ((offset % 4) != 0) {
length = 4 - (offset % 4);
pdf_add_stream(stream, padbytes, length);
offset += length;
}
if (!td->tables[i].data) {
#ifdef XETEX
if (!sfont->ft_face)
#else
if (!sfont->stream)
#endif
{
pdf_release_obj(stream);
ERROR("Font file not opened or already closed...");
return NULL;
}
length = td->tables[i].length;
sfnt_seek_set(sfont, td->tables[i].offset);
while (length > 0) {
nb_read = sfnt_read(wbuf, MIN(length, 1024), sfont);
if (nb_read < 0) {
pdf_release_obj(stream);
ERROR("Reading file failed...");
return NULL;
} else if (nb_read > 0) {
pdf_add_stream(stream, wbuf, nb_read);
}
length -= nb_read;
}
} else {
pdf_add_stream(stream,
td->tables[i].data, td->tables[i].length);
RELEASE(td->tables[i].data);
td->tables[i].data = NULL;
}
/* Set offset for next table */
offset += td->tables[i].length;
}
}
stream_dict = pdf_stream_dict(stream);
pdf_add_dict(stream_dict,
pdf_new_name("Length1"),
pdf_new_number(offset));
return stream;
}
|