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[FREETYPE]
[reactos.git] / reactos / lib / 3rdparty / freetype / src / cid / cidload.c
1 /***************************************************************************/
2 /* */
3 /* cidload.c */
4 /* */
5 /* CID-keyed Type1 font loader (body). */
6 /* */
7 /* Copyright 1996-2006, 2009, 2011-2013 by */
8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
9 /* */
10 /* This file is part of the FreeType project, and may only be used, */
11 /* modified, and distributed under the terms of the FreeType project */
12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
13 /* this file you indicate that you have read the license and */
14 /* understand and accept it fully. */
15 /* */
16 /***************************************************************************/
17
18
19 #include <ft2build.h>
20 #include FT_INTERNAL_DEBUG_H
21 #include FT_CONFIG_CONFIG_H
22 #include FT_MULTIPLE_MASTERS_H
23 #include FT_INTERNAL_TYPE1_TYPES_H
24
25 #include "cidload.h"
26
27 #include "ciderrs.h"
28
29
30 /*************************************************************************/
31 /* */
32 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
33 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
34 /* messages during execution. */
35 /* */
36 #undef FT_COMPONENT
37 #define FT_COMPONENT trace_cidload
38
39
40 /* read a single offset */
41 FT_LOCAL_DEF( FT_Long )
42 cid_get_offset( FT_Byte* *start,
43 FT_Byte offsize )
44 {
45 FT_ULong result;
46 FT_Byte* p = *start;
47
48
49 for ( result = 0; offsize > 0; offsize-- )
50 {
51 result <<= 8;
52 result |= *p++;
53 }
54
55 *start = p;
56 return (FT_Long)result;
57 }
58
59
60 /*************************************************************************/
61 /*************************************************************************/
62 /***** *****/
63 /***** TYPE 1 SYMBOL PARSING *****/
64 /***** *****/
65 /*************************************************************************/
66 /*************************************************************************/
67
68
69 static FT_Error
70 cid_load_keyword( CID_Face face,
71 CID_Loader* loader,
72 const T1_Field keyword )
73 {
74 FT_Error error;
75 CID_Parser* parser = &loader->parser;
76 FT_Byte* object;
77 void* dummy_object;
78 CID_FaceInfo cid = &face->cid;
79
80
81 /* if the keyword has a dedicated callback, call it */
82 if ( keyword->type == T1_FIELD_TYPE_CALLBACK )
83 {
84 keyword->reader( (FT_Face)face, parser );
85 error = parser->root.error;
86 goto Exit;
87 }
88
89 /* we must now compute the address of our target object */
90 switch ( keyword->location )
91 {
92 case T1_FIELD_LOCATION_CID_INFO:
93 object = (FT_Byte*)cid;
94 break;
95
96 case T1_FIELD_LOCATION_FONT_INFO:
97 object = (FT_Byte*)&cid->font_info;
98 break;
99
100 case T1_FIELD_LOCATION_FONT_EXTRA:
101 object = (FT_Byte*)&face->font_extra;
102 break;
103
104 case T1_FIELD_LOCATION_BBOX:
105 object = (FT_Byte*)&cid->font_bbox;
106 break;
107
108 default:
109 {
110 CID_FaceDict dict;
111
112
113 if ( parser->num_dict < 0 || parser->num_dict >= cid->num_dicts )
114 {
115 FT_ERROR(( "cid_load_keyword: invalid use of `%s'\n",
116 keyword->ident ));
117 error = FT_THROW( Syntax_Error );
118 goto Exit;
119 }
120
121 dict = cid->font_dicts + parser->num_dict;
122 switch ( keyword->location )
123 {
124 case T1_FIELD_LOCATION_PRIVATE:
125 object = (FT_Byte*)&dict->private_dict;
126 break;
127
128 default:
129 object = (FT_Byte*)dict;
130 }
131 }
132 }
133
134 dummy_object = object;
135
136 /* now, load the keyword data in the object's field(s) */
137 if ( keyword->type == T1_FIELD_TYPE_INTEGER_ARRAY ||
138 keyword->type == T1_FIELD_TYPE_FIXED_ARRAY )
139 error = cid_parser_load_field_table( &loader->parser, keyword,
140 &dummy_object );
141 else
142 error = cid_parser_load_field( &loader->parser,
143 keyword, &dummy_object );
144 Exit:
145 return error;
146 }
147
148
149 FT_CALLBACK_DEF( FT_Error )
150 cid_parse_font_matrix( CID_Face face,
151 CID_Parser* parser )
152 {
153 FT_Matrix* matrix;
154 FT_Vector* offset;
155 CID_FaceDict dict;
156 FT_Face root = (FT_Face)&face->root;
157 FT_Fixed temp[6];
158 FT_Fixed temp_scale;
159
160
161 if ( parser->num_dict >= 0 && parser->num_dict < face->cid.num_dicts )
162 {
163 dict = face->cid.font_dicts + parser->num_dict;
164 matrix = &dict->font_matrix;
165 offset = &dict->font_offset;
166
167 (void)cid_parser_to_fixed_array( parser, 6, temp, 3 );
168
169 temp_scale = FT_ABS( temp[3] );
170
171 /* Set Units per EM based on FontMatrix values. We set the value to */
172 /* 1000 / temp_scale, because temp_scale was already multiplied by */
173 /* 1000 (in t1_tofixed, from psobjs.c). */
174
175 root->units_per_EM = (FT_UShort)FT_DivFix( 1000, temp_scale );
176
177 /* we need to scale the values by 1.0/temp[3] */
178 if ( temp_scale != 0x10000L )
179 {
180 temp[0] = FT_DivFix( temp[0], temp_scale );
181 temp[1] = FT_DivFix( temp[1], temp_scale );
182 temp[2] = FT_DivFix( temp[2], temp_scale );
183 temp[4] = FT_DivFix( temp[4], temp_scale );
184 temp[5] = FT_DivFix( temp[5], temp_scale );
185 temp[3] = 0x10000L;
186 }
187
188 matrix->xx = temp[0];
189 matrix->yx = temp[1];
190 matrix->xy = temp[2];
191 matrix->yy = temp[3];
192
193 /* note that the font offsets are expressed in integer font units */
194 offset->x = temp[4] >> 16;
195 offset->y = temp[5] >> 16;
196 }
197
198 return FT_Err_Ok; /* this is a callback function; */
199 /* we must return an error code */
200 }
201
202
203 FT_CALLBACK_DEF( FT_Error )
204 parse_fd_array( CID_Face face,
205 CID_Parser* parser )
206 {
207 CID_FaceInfo cid = &face->cid;
208 FT_Memory memory = face->root.memory;
209 FT_Error error = FT_Err_Ok;
210 FT_Long num_dicts;
211
212
213 num_dicts = cid_parser_to_int( parser );
214
215 if ( !cid->font_dicts )
216 {
217 FT_Int n;
218
219
220 if ( FT_NEW_ARRAY( cid->font_dicts, num_dicts ) )
221 goto Exit;
222
223 cid->num_dicts = (FT_UInt)num_dicts;
224
225 /* don't forget to set a few defaults */
226 for ( n = 0; n < cid->num_dicts; n++ )
227 {
228 CID_FaceDict dict = cid->font_dicts + n;
229
230
231 /* default value for lenIV */
232 dict->private_dict.lenIV = 4;
233 }
234 }
235
236 Exit:
237 return error;
238 }
239
240
241 /* by mistake, `expansion_factor' appears both in PS_PrivateRec */
242 /* and CID_FaceDictRec (both are public header files and can't */
243 /* changed); we simply copy the value */
244
245 FT_CALLBACK_DEF( FT_Error )
246 parse_expansion_factor( CID_Face face,
247 CID_Parser* parser )
248 {
249 CID_FaceDict dict;
250
251
252 if ( parser->num_dict >= 0 && parser->num_dict < face->cid.num_dicts )
253 {
254 dict = face->cid.font_dicts + parser->num_dict;
255
256 dict->expansion_factor = cid_parser_to_fixed( parser, 0 );
257 dict->private_dict.expansion_factor = dict->expansion_factor;
258 }
259
260 return FT_Err_Ok;
261 }
262
263
264 static
265 const T1_FieldRec cid_field_records[] =
266 {
267
268 #include "cidtoken.h"
269
270 T1_FIELD_CALLBACK( "FDArray", parse_fd_array, 0 )
271 T1_FIELD_CALLBACK( "FontMatrix", cid_parse_font_matrix, 0 )
272 T1_FIELD_CALLBACK( "ExpansionFactor", parse_expansion_factor, 0 )
273
274 { 0, T1_FIELD_LOCATION_CID_INFO, T1_FIELD_TYPE_NONE, 0, 0, 0, 0, 0, 0 }
275 };
276
277
278 static FT_Error
279 cid_parse_dict( CID_Face face,
280 CID_Loader* loader,
281 FT_Byte* base,
282 FT_Long size )
283 {
284 CID_Parser* parser = &loader->parser;
285
286
287 parser->root.cursor = base;
288 parser->root.limit = base + size;
289 parser->root.error = FT_Err_Ok;
290
291 {
292 FT_Byte* cur = base;
293 FT_Byte* limit = cur + size;
294
295
296 for (;;)
297 {
298 FT_Byte* newlimit;
299
300
301 parser->root.cursor = cur;
302 cid_parser_skip_spaces( parser );
303
304 if ( parser->root.cursor >= limit )
305 newlimit = limit - 1 - 17;
306 else
307 newlimit = parser->root.cursor - 17;
308
309 /* look for `%ADOBeginFontDict' */
310 for ( ; cur < newlimit; cur++ )
311 {
312 if ( *cur == '%' &&
313 ft_strncmp( (char*)cur, "%ADOBeginFontDict", 17 ) == 0 )
314 {
315 /* if /FDArray was found, then cid->num_dicts is > 0, and */
316 /* we can start increasing parser->num_dict */
317 if ( face->cid.num_dicts > 0 )
318 parser->num_dict++;
319 }
320 }
321
322 cur = parser->root.cursor;
323 /* no error can occur in cid_parser_skip_spaces */
324 if ( cur >= limit )
325 break;
326
327 cid_parser_skip_PS_token( parser );
328 if ( parser->root.cursor >= limit || parser->root.error )
329 break;
330
331 /* look for immediates */
332 if ( *cur == '/' && cur + 2 < limit )
333 {
334 FT_PtrDist len;
335
336
337 cur++;
338 len = parser->root.cursor - cur;
339
340 if ( len > 0 && len < 22 )
341 {
342 /* now compare the immediate name to the keyword table */
343 T1_Field keyword = (T1_Field)cid_field_records;
344
345
346 for (;;)
347 {
348 FT_Byte* name;
349
350
351 name = (FT_Byte*)keyword->ident;
352 if ( !name )
353 break;
354
355 if ( cur[0] == name[0] &&
356 len == (FT_PtrDist)ft_strlen( (const char*)name ) )
357 {
358 FT_PtrDist n;
359
360
361 for ( n = 1; n < len; n++ )
362 if ( cur[n] != name[n] )
363 break;
364
365 if ( n >= len )
366 {
367 /* we found it - run the parsing callback */
368 parser->root.error = cid_load_keyword( face,
369 loader,
370 keyword );
371 if ( parser->root.error )
372 return parser->root.error;
373 break;
374 }
375 }
376 keyword++;
377 }
378 }
379 }
380
381 cur = parser->root.cursor;
382 }
383 }
384 return parser->root.error;
385 }
386
387
388 /* read the subrmap and the subrs of each font dict */
389 static FT_Error
390 cid_read_subrs( CID_Face face )
391 {
392 CID_FaceInfo cid = &face->cid;
393 FT_Memory memory = face->root.memory;
394 FT_Stream stream = face->cid_stream;
395 FT_Error error;
396 FT_Int n;
397 CID_Subrs subr;
398 FT_UInt max_offsets = 0;
399 FT_ULong* offsets = 0;
400 PSAux_Service psaux = (PSAux_Service)face->psaux;
401
402
403 if ( FT_NEW_ARRAY( face->subrs, cid->num_dicts ) )
404 goto Exit;
405
406 subr = face->subrs;
407 for ( n = 0; n < cid->num_dicts; n++, subr++ )
408 {
409 CID_FaceDict dict = cid->font_dicts + n;
410 FT_Int lenIV = dict->private_dict.lenIV;
411 FT_UInt count, num_subrs = dict->num_subrs;
412 FT_ULong data_len;
413 FT_Byte* p;
414
415
416 /* Check for possible overflow. */
417 if ( num_subrs == FT_UINT_MAX )
418 {
419 error = FT_THROW( Syntax_Error );
420 goto Fail;
421 }
422
423 /* reallocate offsets array if needed */
424 if ( num_subrs + 1 > max_offsets )
425 {
426 FT_UInt new_max = FT_PAD_CEIL( num_subrs + 1, 4 );
427
428
429 if ( new_max <= max_offsets )
430 {
431 error = FT_THROW( Syntax_Error );
432 goto Fail;
433 }
434
435 if ( FT_RENEW_ARRAY( offsets, max_offsets, new_max ) )
436 goto Fail;
437
438 max_offsets = new_max;
439 }
440
441 /* read the subrmap's offsets */
442 if ( FT_STREAM_SEEK( cid->data_offset + dict->subrmap_offset ) ||
443 FT_FRAME_ENTER( ( num_subrs + 1 ) * dict->sd_bytes ) )
444 goto Fail;
445
446 p = (FT_Byte*)stream->cursor;
447 for ( count = 0; count <= num_subrs; count++ )
448 offsets[count] = cid_get_offset( &p, (FT_Byte)dict->sd_bytes );
449
450 FT_FRAME_EXIT();
451
452 /* offsets must be ordered */
453 for ( count = 1; count <= num_subrs; count++ )
454 if ( offsets[count - 1] > offsets[count] )
455 goto Fail;
456
457 /* now, compute the size of subrs charstrings, */
458 /* allocate, and read them */
459 data_len = offsets[num_subrs] - offsets[0];
460
461 if ( FT_NEW_ARRAY( subr->code, num_subrs + 1 ) ||
462 FT_ALLOC( subr->code[0], data_len ) )
463 goto Fail;
464
465 if ( FT_STREAM_SEEK( cid->data_offset + offsets[0] ) ||
466 FT_STREAM_READ( subr->code[0], data_len ) )
467 goto Fail;
468
469 /* set up pointers */
470 for ( count = 1; count <= num_subrs; count++ )
471 {
472 FT_ULong len;
473
474
475 len = offsets[count] - offsets[count - 1];
476 subr->code[count] = subr->code[count - 1] + len;
477 }
478
479 /* decrypt subroutines, but only if lenIV >= 0 */
480 if ( lenIV >= 0 )
481 {
482 for ( count = 0; count < num_subrs; count++ )
483 {
484 FT_ULong len;
485
486
487 len = offsets[count + 1] - offsets[count];
488 psaux->t1_decrypt( subr->code[count], len, 4330 );
489 }
490 }
491
492 subr->num_subrs = num_subrs;
493 }
494
495 Exit:
496 FT_FREE( offsets );
497 return error;
498
499 Fail:
500 if ( face->subrs )
501 {
502 for ( n = 0; n < cid->num_dicts; n++ )
503 {
504 if ( face->subrs[n].code )
505 FT_FREE( face->subrs[n].code[0] );
506
507 FT_FREE( face->subrs[n].code );
508 }
509 FT_FREE( face->subrs );
510 }
511 goto Exit;
512 }
513
514
515 static void
516 cid_init_loader( CID_Loader* loader,
517 CID_Face face )
518 {
519 FT_UNUSED( face );
520
521 FT_MEM_ZERO( loader, sizeof ( *loader ) );
522 }
523
524
525 static void
526 cid_done_loader( CID_Loader* loader )
527 {
528 CID_Parser* parser = &loader->parser;
529
530
531 /* finalize parser */
532 cid_parser_done( parser );
533 }
534
535
536 static FT_Error
537 cid_hex_to_binary( FT_Byte* data,
538 FT_Long data_len,
539 FT_ULong offset,
540 CID_Face face )
541 {
542 FT_Stream stream = face->root.stream;
543 FT_Error error;
544
545 FT_Byte buffer[256];
546 FT_Byte *p, *plimit;
547 FT_Byte *d, *dlimit;
548 FT_Byte val;
549
550 FT_Bool upper_nibble, done;
551
552
553 if ( FT_STREAM_SEEK( offset ) )
554 goto Exit;
555
556 d = data;
557 dlimit = d + data_len;
558 p = buffer;
559 plimit = p;
560
561 upper_nibble = 1;
562 done = 0;
563
564 while ( d < dlimit )
565 {
566 if ( p >= plimit )
567 {
568 FT_ULong oldpos = FT_STREAM_POS();
569 FT_ULong size = stream->size - oldpos;
570
571
572 if ( size == 0 )
573 {
574 error = FT_THROW( Syntax_Error );
575 goto Exit;
576 }
577
578 if ( FT_STREAM_READ( buffer, 256 > size ? size : 256 ) )
579 goto Exit;
580 p = buffer;
581 plimit = p + FT_STREAM_POS() - oldpos;
582 }
583
584 if ( ft_isdigit( *p ) )
585 val = (FT_Byte)( *p - '0' );
586 else if ( *p >= 'a' && *p <= 'f' )
587 val = (FT_Byte)( *p - 'a' );
588 else if ( *p >= 'A' && *p <= 'F' )
589 val = (FT_Byte)( *p - 'A' + 10 );
590 else if ( *p == ' ' ||
591 *p == '\t' ||
592 *p == '\r' ||
593 *p == '\n' ||
594 *p == '\f' ||
595 *p == '\0' )
596 {
597 p++;
598 continue;
599 }
600 else if ( *p == '>' )
601 {
602 val = 0;
603 done = 1;
604 }
605 else
606 {
607 error = FT_THROW( Syntax_Error );
608 goto Exit;
609 }
610
611 if ( upper_nibble )
612 *d = (FT_Byte)( val << 4 );
613 else
614 {
615 *d = (FT_Byte)( *d + val );
616 d++;
617 }
618
619 upper_nibble = (FT_Byte)( 1 - upper_nibble );
620
621 if ( done )
622 break;
623
624 p++;
625 }
626
627 error = FT_Err_Ok;
628
629 Exit:
630 return error;
631 }
632
633
634 FT_LOCAL_DEF( FT_Error )
635 cid_face_open( CID_Face face,
636 FT_Int face_index )
637 {
638 CID_Loader loader;
639 CID_Parser* parser;
640 FT_Memory memory = face->root.memory;
641 FT_Error error;
642
643
644 cid_init_loader( &loader, face );
645
646 parser = &loader.parser;
647 error = cid_parser_new( parser, face->root.stream, face->root.memory,
648 (PSAux_Service)face->psaux );
649 if ( error )
650 goto Exit;
651
652 error = cid_parse_dict( face, &loader,
653 parser->postscript,
654 parser->postscript_len );
655 if ( error )
656 goto Exit;
657
658 if ( face_index < 0 )
659 goto Exit;
660
661 if ( FT_NEW( face->cid_stream ) )
662 goto Exit;
663
664 if ( parser->binary_length )
665 {
666 /* we must convert the data section from hexadecimal to binary */
667 if ( FT_ALLOC( face->binary_data, parser->binary_length ) ||
668 cid_hex_to_binary( face->binary_data, parser->binary_length,
669 parser->data_offset, face ) )
670 goto Exit;
671
672 FT_Stream_OpenMemory( face->cid_stream,
673 face->binary_data, parser->binary_length );
674 face->cid.data_offset = 0;
675 }
676 else
677 {
678 *face->cid_stream = *face->root.stream;
679 face->cid.data_offset = loader.parser.data_offset;
680 }
681
682 error = cid_read_subrs( face );
683
684 Exit:
685 cid_done_loader( &loader );
686 return error;
687 }
688
689
690 /* END */
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