projects / reactos.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
Sync with trunk r63343.
[reactos.git] / lib / 3rdparty / freetype / src / type42 / t42parse.c
1 /***************************************************************************/
2 /* */
3 /* t42parse.c */
4 /* */
5 /* Type 42 font parser (body). */
6 /* */
7 /* Copyright 2002-2014 by */
8 /* Roberto Alameda. */
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 "t42parse.h"
20 #include "t42error.h"
21 #include FT_INTERNAL_DEBUG_H
22 #include FT_INTERNAL_STREAM_H
23 #include FT_INTERNAL_POSTSCRIPT_AUX_H
24
25
26 /*************************************************************************/
27 /* */
28 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
29 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
30 /* messages during execution. */
31 /* */
32 #undef FT_COMPONENT
33 #define FT_COMPONENT trace_t42
34
35
36 static void
37 t42_parse_font_matrix( T42_Face face,
38 T42_Loader loader );
39 static void
40 t42_parse_encoding( T42_Face face,
41 T42_Loader loader );
42
43 static void
44 t42_parse_charstrings( T42_Face face,
45 T42_Loader loader );
46
47 static void
48 t42_parse_sfnts( T42_Face face,
49 T42_Loader loader );
50
51
52 /* as Type42 fonts have no Private dict, */
53 /* we set the last argument of T1_FIELD_XXX to 0 */
54 static const
55 T1_FieldRec t42_keywords[] =
56 {
57
58 #undef FT_STRUCTURE
59 #define FT_STRUCTURE T1_FontInfo
60 #undef T1CODE
61 #define T1CODE T1_FIELD_LOCATION_FONT_INFO
62
63 T1_FIELD_STRING( "version", version, 0 )
64 T1_FIELD_STRING( "Notice", notice, 0 )
65 T1_FIELD_STRING( "FullName", full_name, 0 )
66 T1_FIELD_STRING( "FamilyName", family_name, 0 )
67 T1_FIELD_STRING( "Weight", weight, 0 )
68 T1_FIELD_NUM ( "ItalicAngle", italic_angle, 0 )
69 T1_FIELD_BOOL ( "isFixedPitch", is_fixed_pitch, 0 )
70 T1_FIELD_NUM ( "UnderlinePosition", underline_position, 0 )
71 T1_FIELD_NUM ( "UnderlineThickness", underline_thickness, 0 )
72
73 #undef FT_STRUCTURE
74 #define FT_STRUCTURE PS_FontExtraRec
75 #undef T1CODE
76 #define T1CODE T1_FIELD_LOCATION_FONT_EXTRA
77
78 T1_FIELD_NUM ( "FSType", fs_type, 0 )
79
80 #undef FT_STRUCTURE
81 #define FT_STRUCTURE T1_FontRec
82 #undef T1CODE
83 #define T1CODE T1_FIELD_LOCATION_FONT_DICT
84
85 T1_FIELD_KEY ( "FontName", font_name, 0 )
86 T1_FIELD_NUM ( "PaintType", paint_type, 0 )
87 T1_FIELD_NUM ( "FontType", font_type, 0 )
88 T1_FIELD_FIXED( "StrokeWidth", stroke_width, 0 )
89
90 #undef FT_STRUCTURE
91 #define FT_STRUCTURE FT_BBox
92 #undef T1CODE
93 #define T1CODE T1_FIELD_LOCATION_BBOX
94
95 T1_FIELD_BBOX("FontBBox", xMin, 0 )
96
97 T1_FIELD_CALLBACK( "FontMatrix", t42_parse_font_matrix, 0 )
98 T1_FIELD_CALLBACK( "Encoding", t42_parse_encoding, 0 )
99 T1_FIELD_CALLBACK( "CharStrings", t42_parse_charstrings, 0 )
100 T1_FIELD_CALLBACK( "sfnts", t42_parse_sfnts, 0 )
101
102 { 0, T1_FIELD_LOCATION_CID_INFO, T1_FIELD_TYPE_NONE, 0, 0, 0, 0, 0, 0 }
103 };
104
105
106 #define T1_Add_Table( p, i, o, l ) (p)->funcs.add( (p), i, o, l )
107 #define T1_Done_Table( p ) \
108 do \
109 { \
110 if ( (p)->funcs.done ) \
111 (p)->funcs.done( p ); \
112 } while ( 0 )
113 #define T1_Release_Table( p ) \
114 do \
115 { \
116 if ( (p)->funcs.release ) \
117 (p)->funcs.release( p ); \
118 } while ( 0 )
119
120 #define T1_Skip_Spaces( p ) (p)->root.funcs.skip_spaces( &(p)->root )
121 #define T1_Skip_PS_Token( p ) (p)->root.funcs.skip_PS_token( &(p)->root )
122
123 #define T1_ToInt( p ) \
124 (p)->root.funcs.to_int( &(p)->root )
125 #define T1_ToBytes( p, b, m, n, d ) \
126 (p)->root.funcs.to_bytes( &(p)->root, b, m, n, d )
127
128 #define T1_ToFixedArray( p, m, f, t ) \
129 (p)->root.funcs.to_fixed_array( &(p)->root, m, f, t )
130 #define T1_ToToken( p, t ) \
131 (p)->root.funcs.to_token( &(p)->root, t )
132
133 #define T1_Load_Field( p, f, o, m, pf ) \
134 (p)->root.funcs.load_field( &(p)->root, f, o, m, pf )
135 #define T1_Load_Field_Table( p, f, o, m, pf ) \
136 (p)->root.funcs.load_field_table( &(p)->root, f, o, m, pf )
137
138
139 /********************* Parsing Functions ******************/
140
141 FT_LOCAL_DEF( FT_Error )
142 t42_parser_init( T42_Parser parser,
143 FT_Stream stream,
144 FT_Memory memory,
145 PSAux_Service psaux )
146 {
147 FT_Error error = FT_Err_Ok;
148 FT_Long size;
149
150
151 psaux->ps_parser_funcs->init( &parser->root, 0, 0, memory );
152
153 parser->stream = stream;
154 parser->base_len = 0;
155 parser->base_dict = 0;
156 parser->in_memory = 0;
157
158 /*******************************************************************/
159 /* */
160 /* Here a short summary of what is going on: */
161 /* */
162 /* When creating a new Type 42 parser, we try to locate and load */
163 /* the base dictionary, loading the whole font into memory. */
164 /* */
165 /* When `loading' the base dictionary, we only set up pointers */
166 /* in the case of a memory-based stream. Otherwise, we allocate */
167 /* and load the base dictionary in it. */
168 /* */
169 /* parser->in_memory is set if we have a memory stream. */
170 /* */
171
172 if ( FT_STREAM_SEEK( 0L ) ||
173 FT_FRAME_ENTER( 17 ) )
174 goto Exit;
175
176 if ( ft_memcmp( stream->cursor, "%!PS-TrueTypeFont", 17 ) != 0 )
177 {
178 FT_TRACE2(( " not a Type42 font\n" ));
179 error = FT_THROW( Unknown_File_Format );
180 }
181
182 FT_FRAME_EXIT();
183
184 if ( error || FT_STREAM_SEEK( 0 ) )
185 goto Exit;
186
187 size = stream->size;
188
189 /* now, try to load `size' bytes of the `base' dictionary we */
190 /* found previously */
191
192 /* if it is a memory-based resource, set up pointers */
193 if ( !stream->read )
194 {
195 parser->base_dict = (FT_Byte*)stream->base + stream->pos;
196 parser->base_len = size;
197 parser->in_memory = 1;
198
199 /* check that the `size' field is valid */
200 if ( FT_STREAM_SKIP( size ) )
201 goto Exit;
202 }
203 else
204 {
205 /* read segment in memory */
206 if ( FT_ALLOC( parser->base_dict, size ) ||
207 FT_STREAM_READ( parser->base_dict, size ) )
208 goto Exit;
209
210 parser->base_len = size;
211 }
212
213 parser->root.base = parser->base_dict;
214 parser->root.cursor = parser->base_dict;
215 parser->root.limit = parser->root.cursor + parser->base_len;
216
217 Exit:
218 if ( error && !parser->in_memory )
219 FT_FREE( parser->base_dict );
220
221 return error;
222 }
223
224
225 FT_LOCAL_DEF( void )
226 t42_parser_done( T42_Parser parser )
227 {
228 FT_Memory memory = parser->root.memory;
229
230
231 /* free the base dictionary only when we have a disk stream */
232 if ( !parser->in_memory )
233 FT_FREE( parser->base_dict );
234
235 parser->root.funcs.done( &parser->root );
236 }
237
238
239 static int
240 t42_is_space( FT_Byte c )
241 {
242 return ( c == ' ' || c == '\t' ||
243 c == '\r' || c == '\n' || c == '\f' ||
244 c == '\0' );
245 }
246
247
248 static void
249 t42_parse_font_matrix( T42_Face face,
250 T42_Loader loader )
251 {
252 T42_Parser parser = &loader->parser;
253 FT_Matrix* matrix = &face->type1.font_matrix;
254 FT_Vector* offset = &face->type1.font_offset;
255 FT_Face root = (FT_Face)&face->root;
256 FT_Fixed temp[6];
257 FT_Fixed temp_scale;
258 FT_Int result;
259
260
261 result = T1_ToFixedArray( parser, 6, temp, 3 );
262
263 if ( result < 6 )
264 {
265 parser->root.error = FT_THROW( Invalid_File_Format );
266 return;
267 }
268
269 temp_scale = FT_ABS( temp[3] );
270
271 if ( temp_scale == 0 )
272 {
273 FT_ERROR(( "t1_parse_font_matrix: invalid font matrix\n" ));
274 parser->root.error = FT_THROW( Invalid_File_Format );
275 return;
276 }
277
278 /* Set Units per EM based on FontMatrix values. We set the value to */
279 /* 1000 / temp_scale, because temp_scale was already multiplied by */
280 /* 1000 (in t1_tofixed, from psobjs.c). */
281
282 root->units_per_EM = (FT_UShort)FT_DivFix( 1000, temp_scale );
283
284 /* we need to scale the values by 1.0/temp_scale */
285 if ( temp_scale != 0x10000L )
286 {
287 temp[0] = FT_DivFix( temp[0], temp_scale );
288 temp[1] = FT_DivFix( temp[1], temp_scale );
289 temp[2] = FT_DivFix( temp[2], temp_scale );
290 temp[4] = FT_DivFix( temp[4], temp_scale );
291 temp[5] = FT_DivFix( temp[5], temp_scale );
292 temp[3] = temp[3] < 0 ? -0x10000L : 0x10000L;
293 }
294
295 matrix->xx = temp[0];
296 matrix->yx = temp[1];
297 matrix->xy = temp[2];
298 matrix->yy = temp[3];
299
300 /* note that the offsets must be expressed in integer font units */
301 offset->x = temp[4] >> 16;
302 offset->y = temp[5] >> 16;
303 }
304
305
306 static void
307 t42_parse_encoding( T42_Face face,
308 T42_Loader loader )
309 {
310 T42_Parser parser = &loader->parser;
311 FT_Byte* cur;
312 FT_Byte* limit = parser->root.limit;
313
314 PSAux_Service psaux = (PSAux_Service)face->psaux;
315
316
317 T1_Skip_Spaces( parser );
318 cur = parser->root.cursor;
319 if ( cur >= limit )
320 {
321 FT_ERROR(( "t42_parse_encoding: out of bounds\n" ));
322 parser->root.error = FT_THROW( Invalid_File_Format );
323 return;
324 }
325
326 /* if we have a number or `[', the encoding is an array, */
327 /* and we must load it now */
328 if ( ft_isdigit( *cur ) || *cur == '[' )
329 {
330 T1_Encoding encode = &face->type1.encoding;
331 FT_Int count, n;
332 PS_Table char_table = &loader->encoding_table;
333 FT_Memory memory = parser->root.memory;
334 FT_Error error;
335 FT_Bool only_immediates = 0;
336
337
338 /* read the number of entries in the encoding; should be 256 */
339 if ( *cur == '[' )
340 {
341 count = 256;
342 only_immediates = 1;
343 parser->root.cursor++;
344 }
345 else
346 count = (FT_Int)T1_ToInt( parser );
347
348 T1_Skip_Spaces( parser );
349 if ( parser->root.cursor >= limit )
350 return;
351
352 /* we use a T1_Table to store our charnames */
353 loader->num_chars = encode->num_chars = count;
354 if ( FT_NEW_ARRAY( encode->char_index, count ) ||
355 FT_NEW_ARRAY( encode->char_name, count ) ||
356 FT_SET_ERROR( psaux->ps_table_funcs->init(
357 char_table, count, memory ) ) )
358 {
359 parser->root.error = error;
360 return;
361 }
362
363 /* We need to `zero' out encoding_table.elements */
364 for ( n = 0; n < count; n++ )
365 {
366 char* notdef = (char *)".notdef";
367
368
369 T1_Add_Table( char_table, n, notdef, 8 );
370 }
371
372 /* Now we need to read records of the form */
373 /* */
374 /* ... charcode /charname ... */
375 /* */
376 /* for each entry in our table. */
377 /* */
378 /* We simply look for a number followed by an immediate */
379 /* name. Note that this ignores correctly the sequence */
380 /* that is often seen in type42 fonts: */
381 /* */
382 /* 0 1 255 { 1 index exch /.notdef put } for dup */
383 /* */
384 /* used to clean the encoding array before anything else. */
385 /* */
386 /* Alternatively, if the array is directly given as */
387 /* */
388 /* /Encoding [ ... ] */
389 /* */
390 /* we only read immediates. */
391
392 n = 0;
393 T1_Skip_Spaces( parser );
394
395 while ( parser->root.cursor < limit )
396 {
397 cur = parser->root.cursor;
398
399 /* we stop when we encounter `def' or `]' */
400 if ( *cur == 'd' && cur + 3 < limit )
401 {
402 if ( cur[1] == 'e' &&
403 cur[2] == 'f' &&
404 t42_is_space( cur[3] ) )
405 {
406 FT_TRACE6(( "encoding end\n" ));
407 cur += 3;
408 break;
409 }
410 }
411 if ( *cur == ']' )
412 {
413 FT_TRACE6(( "encoding end\n" ));
414 cur++;
415 break;
416 }
417
418 /* check whether we have found an entry */
419 if ( ft_isdigit( *cur ) || only_immediates )
420 {
421 FT_Int charcode;
422
423
424 if ( only_immediates )
425 charcode = n;
426 else
427 {
428 charcode = (FT_Int)T1_ToInt( parser );
429 T1_Skip_Spaces( parser );
430 }
431
432 cur = parser->root.cursor;
433
434 if ( cur + 2 < limit && *cur == '/' && n < count )
435 {
436 FT_PtrDist len;
437
438
439 cur++;
440
441 parser->root.cursor = cur;
442 T1_Skip_PS_Token( parser );
443 if ( parser->root.cursor >= limit )
444 return;
445 if ( parser->root.error )
446 return;
447
448 len = parser->root.cursor - cur;
449
450 parser->root.error = T1_Add_Table( char_table, charcode,
451 cur, len + 1 );
452 if ( parser->root.error )
453 return;
454 char_table->elements[charcode][len] = '\0';
455
456 n++;
457 }
458 else if ( only_immediates )
459 {
460 /* Since the current position is not updated for */
461 /* immediates-only mode we would get an infinite loop if */
462 /* we don't do anything here. */
463 /* */
464 /* This encoding array is not valid according to the type1 */
465 /* specification (it might be an encoding for a CID type1 */
466 /* font, however), so we conclude that this font is NOT a */
467 /* type1 font. */
468 parser->root.error = FT_THROW( Unknown_File_Format );
469 return;
470 }
471 }
472 else
473 {
474 T1_Skip_PS_Token( parser );
475 if ( parser->root.error )
476 return;
477 }
478
479 T1_Skip_Spaces( parser );
480 }
481
482 face->type1.encoding_type = T1_ENCODING_TYPE_ARRAY;
483 parser->root.cursor = cur;
484 }
485
486 /* Otherwise, we should have either `StandardEncoding', */
487 /* `ExpertEncoding', or `ISOLatin1Encoding' */
488 else
489 {
490 if ( cur + 17 < limit &&
491 ft_strncmp( (const char*)cur, "StandardEncoding", 16 ) == 0 )
492 face->type1.encoding_type = T1_ENCODING_TYPE_STANDARD;
493
494 else if ( cur + 15 < limit &&
495 ft_strncmp( (const char*)cur, "ExpertEncoding", 14 ) == 0 )
496 face->type1.encoding_type = T1_ENCODING_TYPE_EXPERT;
497
498 else if ( cur + 18 < limit &&
499 ft_strncmp( (const char*)cur, "ISOLatin1Encoding", 17 ) == 0 )
500 face->type1.encoding_type = T1_ENCODING_TYPE_ISOLATIN1;
501
502 else
503 parser->root.error = FT_THROW( Ignore );
504 }
505 }
506
507
508 typedef enum T42_Load_Status_
509 {
510 BEFORE_START,
511 BEFORE_TABLE_DIR,
512 OTHER_TABLES
513
514 } T42_Load_Status;
515
516
517 static void
518 t42_parse_sfnts( T42_Face face,
519 T42_Loader loader )
520 {
521 T42_Parser parser = &loader->parser;
522 FT_Memory memory = parser->root.memory;
523 FT_Byte* cur;
524 FT_Byte* limit = parser->root.limit;
525 FT_Error error;
526 FT_Int num_tables = 0;
527 FT_ULong count, ttf_size = 0;
528
529 FT_Long n, string_size, old_string_size, real_size;
530 FT_Byte* string_buf = NULL;
531 FT_Bool allocated = 0;
532
533 T42_Load_Status status;
534
535
536 /* The format is */
537 /* */
538 /* /sfnts [ <hexstring> <hexstring> ... ] def */
539 /* */
540 /* or */
541 /* */
542 /* /sfnts [ */
543 /* <num_bin_bytes> RD <binary data> */
544 /* <num_bin_bytes> RD <binary data> */
545 /* ... */
546 /* ] def */
547 /* */
548 /* with exactly one space after the `RD' token. */
549
550 T1_Skip_Spaces( parser );
551
552 if ( parser->root.cursor >= limit || *parser->root.cursor++ != '[' )
553 {
554 FT_ERROR(( "t42_parse_sfnts: can't find begin of sfnts vector\n" ));
555 error = FT_THROW( Invalid_File_Format );
556 goto Fail;
557 }
558
559 T1_Skip_Spaces( parser );
560 status = BEFORE_START;
561 string_size = 0;
562 old_string_size = 0;
563 count = 0;
564
565 while ( parser->root.cursor < limit )
566 {
567 cur = parser->root.cursor;
568
569 if ( *cur == ']' )
570 {
571 parser->root.cursor++;
572 goto Exit;
573 }
574
575 else if ( *cur == '<' )
576 {
577 T1_Skip_PS_Token( parser );
578 if ( parser->root.error )
579 goto Exit;
580
581 /* don't include delimiters */
582 string_size = (FT_Long)( ( parser->root.cursor - cur - 2 + 1 ) / 2 );
583 if ( FT_REALLOC( string_buf, old_string_size, string_size ) )
584 goto Fail;
585
586 allocated = 1;
587
588 parser->root.cursor = cur;
589 (void)T1_ToBytes( parser, string_buf, string_size, &real_size, 1 );
590 old_string_size = string_size;
591 string_size = real_size;
592 }
593
594 else if ( ft_isdigit( *cur ) )
595 {
596 if ( allocated )
597 {
598 FT_ERROR(( "t42_parse_sfnts: "
599 "can't handle mixed binary and hex strings\n" ));
600 error = FT_THROW( Invalid_File_Format );
601 goto Fail;
602 }
603
604 string_size = T1_ToInt( parser );
605 if ( string_size < 0 )
606 {
607 FT_ERROR(( "t42_parse_sfnts: invalid string size\n" ));
608 error = FT_THROW( Invalid_File_Format );
609 goto Fail;
610 }
611
612 T1_Skip_PS_Token( parser ); /* `RD' */
613 if ( parser->root.error )
614 return;
615
616 string_buf = parser->root.cursor + 1; /* one space after `RD' */
617
618 if ( limit - parser->root.cursor < string_size )
619 {
620 FT_ERROR(( "t42_parse_sfnts: too many binary data\n" ));
621 error = FT_THROW( Invalid_File_Format );
622 goto Fail;
623 }
624 else
625 parser->root.cursor += string_size + 1;
626 }
627
628 if ( !string_buf )
629 {
630 FT_ERROR(( "t42_parse_sfnts: invalid data in sfnts array\n" ));
631 error = FT_THROW( Invalid_File_Format );
632 goto Fail;
633 }
634
635 /* A string can have a trailing zero (odd) byte for padding. */
636 /* Ignore it. */
637 if ( ( string_size & 1 ) && string_buf[string_size - 1] == 0 )
638 string_size--;
639
640 if ( !string_size )
641 {
642 FT_ERROR(( "t42_parse_sfnts: invalid string\n" ));
643 error = FT_THROW( Invalid_File_Format );
644 goto Fail;
645 }
646
647 for ( n = 0; n < string_size; n++ )
648 {
649 switch ( status )
650 {
651 case BEFORE_START:
652 /* load offset table, 12 bytes */
653 if ( count < 12 )
654 {
655 face->ttf_data[count++] = string_buf[n];
656 continue;
657 }
658 else
659 {
660 num_tables = 16 * face->ttf_data[4] + face->ttf_data[5];
661 status = BEFORE_TABLE_DIR;
662 ttf_size = 12 + 16 * num_tables;
663
664 if ( FT_REALLOC( face->ttf_data, 12, ttf_size ) )
665 goto Fail;
666 }
667 /* fall through */
668
669 case BEFORE_TABLE_DIR:
670 /* the offset table is read; read the table directory */
671 if ( count < ttf_size )
672 {
673 face->ttf_data[count++] = string_buf[n];
674 continue;
675 }
676 else
677 {
678 int i;
679 FT_ULong len;
680
681
682 for ( i = 0; i < num_tables; i++ )
683 {
684 FT_Byte* p = face->ttf_data + 12 + 16 * i + 12;
685
686
687 len = FT_PEEK_ULONG( p );
688
689 /* Pad to a 4-byte boundary length */
690 ttf_size += ( len + 3 ) & ~3;
691 }
692
693 status = OTHER_TABLES;
694 face->ttf_size = ttf_size;
695
696 /* there are no more than 256 tables, so no size check here */
697 if ( FT_REALLOC( face->ttf_data, 12 + 16 * num_tables,
698 ttf_size + 1 ) )
699 goto Fail;
700 }
701 /* fall through */
702
703 case OTHER_TABLES:
704 /* all other tables are just copied */
705 if ( count >= ttf_size )
706 {
707 FT_ERROR(( "t42_parse_sfnts: too many binary data\n" ));
708 error = FT_THROW( Invalid_File_Format );
709 goto Fail;
710 }
711 face->ttf_data[count++] = string_buf[n];
712 }
713 }
714
715 T1_Skip_Spaces( parser );
716 }
717
718 /* if control reaches this point, the format was not valid */
719 error = FT_THROW( Invalid_File_Format );
720
721 Fail:
722 parser->root.error = error;
723
724 Exit:
725 if ( allocated )
726 FT_FREE( string_buf );
727 }
728
729
730 static void
731 t42_parse_charstrings( T42_Face face,
732 T42_Loader loader )
733 {
734 T42_Parser parser = &loader->parser;
735 PS_Table code_table = &loader->charstrings;
736 PS_Table name_table = &loader->glyph_names;
737 PS_Table swap_table = &loader->swap_table;
738 FT_Memory memory = parser->root.memory;
739 FT_Error error;
740
741 PSAux_Service psaux = (PSAux_Service)face->psaux;
742
743 FT_Byte* cur;
744 FT_Byte* limit = parser->root.limit;
745 FT_UInt n;
746 FT_UInt notdef_index = 0;
747 FT_Byte notdef_found = 0;
748
749
750 T1_Skip_Spaces( parser );
751
752 if ( parser->root.cursor >= limit )
753 {
754 FT_ERROR(( "t42_parse_charstrings: out of bounds\n" ));
755 error = FT_THROW( Invalid_File_Format );
756 goto Fail;
757 }
758
759 if ( ft_isdigit( *parser->root.cursor ) )
760 {
761 loader->num_glyphs = (FT_UInt)T1_ToInt( parser );
762 if ( parser->root.error )
763 return;
764 }
765 else if ( *parser->root.cursor == '<' )
766 {
767 /* We have `<< ... >>'. Count the number of `/' in the dictionary */
768 /* to get its size. */
769 FT_UInt count = 0;
770
771
772 T1_Skip_PS_Token( parser );
773 if ( parser->root.error )
774 return;
775 T1_Skip_Spaces( parser );
776 cur = parser->root.cursor;
777
778 while ( parser->root.cursor < limit )
779 {
780 if ( *parser->root.cursor == '/' )
781 count++;
782 else if ( *parser->root.cursor == '>' )
783 {
784 loader->num_glyphs = count;
785 parser->root.cursor = cur; /* rewind */
786 break;
787 }
788 T1_Skip_PS_Token( parser );
789 if ( parser->root.error )
790 return;
791 T1_Skip_Spaces( parser );
792 }
793 }
794 else
795 {
796 FT_ERROR(( "t42_parse_charstrings: invalid token\n" ));
797 error = FT_THROW( Invalid_File_Format );
798 goto Fail;
799 }
800
801 if ( parser->root.cursor >= limit )
802 {
803 FT_ERROR(( "t42_parse_charstrings: out of bounds\n" ));
804 error = FT_THROW( Invalid_File_Format );
805 goto Fail;
806 }
807
808 /* initialize tables */
809
810 error = psaux->ps_table_funcs->init( code_table,
811 loader->num_glyphs,
812 memory );
813 if ( error )
814 goto Fail;
815
816 error = psaux->ps_table_funcs->init( name_table,
817 loader->num_glyphs,
818 memory );
819 if ( error )
820 goto Fail;
821
822 /* Initialize table for swapping index notdef_index and */
823 /* index 0 names and codes (if necessary). */
824
825 error = psaux->ps_table_funcs->init( swap_table, 4, memory );
826 if ( error )
827 goto Fail;
828
829 n = 0;
830
831 for (;;)
832 {
833 /* The format is simple: */
834 /* `/glyphname' + index [+ def] */
835
836 T1_Skip_Spaces( parser );
837
838 cur = parser->root.cursor;
839 if ( cur >= limit )
840 break;
841
842 /* We stop when we find an `end' keyword or '>' */
843 if ( *cur == 'e' &&
844 cur + 3 < limit &&
845 cur[1] == 'n' &&
846 cur[2] == 'd' &&
847 t42_is_space( cur[3] ) )
848 break;
849 if ( *cur == '>' )
850 break;
851
852 T1_Skip_PS_Token( parser );
853 if ( parser->root.error )
854 return;
855
856 if ( *cur == '/' )
857 {
858 FT_PtrDist len;
859
860
861 if ( cur + 1 >= limit )
862 {
863 FT_ERROR(( "t42_parse_charstrings: out of bounds\n" ));
864 error = FT_THROW( Invalid_File_Format );
865 goto Fail;
866 }
867
868 cur++; /* skip `/' */
869 len = parser->root.cursor - cur;
870
871 error = T1_Add_Table( name_table, n, cur, len + 1 );
872 if ( error )
873 goto Fail;
874
875 /* add a trailing zero to the name table */
876 name_table->elements[n][len] = '\0';
877
878 /* record index of /.notdef */
879 if ( *cur == '.' &&
880 ft_strcmp( ".notdef",
881 (const char*)(name_table->elements[n]) ) == 0 )
882 {
883 notdef_index = n;
884 notdef_found = 1;
885 }
886
887 T1_Skip_Spaces( parser );
888
889 cur = parser->root.cursor;
890
891 (void)T1_ToInt( parser );
892 if ( parser->root.cursor >= limit )
893 {
894 FT_ERROR(( "t42_parse_charstrings: out of bounds\n" ));
895 error = FT_THROW( Invalid_File_Format );
896 goto Fail;
897 }
898
899 len = parser->root.cursor - cur;
900
901 error = T1_Add_Table( code_table, n, cur, len + 1 );
902 if ( error )
903 goto Fail;
904
905 code_table->elements[n][len] = '\0';
906
907 n++;
908 if ( n >= loader->num_glyphs )
909 break;
910 }
911 }
912
913 loader->num_glyphs = n;
914
915 if ( !notdef_found )
916 {
917 FT_ERROR(( "t42_parse_charstrings: no /.notdef glyph\n" ));
918 error = FT_THROW( Invalid_File_Format );
919 goto Fail;
920 }
921
922 /* if /.notdef does not occupy index 0, do our magic. */
923 if ( ft_strcmp( (const char*)".notdef",
924 (const char*)name_table->elements[0] ) )
925 {
926 /* Swap glyph in index 0 with /.notdef glyph. First, add index 0 */
927 /* name and code entries to swap_table. Then place notdef_index */
928 /* name and code entries into swap_table. Then swap name and code */
929 /* entries at indices notdef_index and 0 using values stored in */
930 /* swap_table. */
931
932 /* Index 0 name */
933 error = T1_Add_Table( swap_table, 0,
934 name_table->elements[0],
935 name_table->lengths [0] );
936 if ( error )
937 goto Fail;
938
939 /* Index 0 code */
940 error = T1_Add_Table( swap_table, 1,
941 code_table->elements[0],
942 code_table->lengths [0] );
943 if ( error )
944 goto Fail;
945
946 /* Index notdef_index name */
947 error = T1_Add_Table( swap_table, 2,
948 name_table->elements[notdef_index],
949 name_table->lengths [notdef_index] );
950 if ( error )
951 goto Fail;
952
953 /* Index notdef_index code */
954 error = T1_Add_Table( swap_table, 3,
955 code_table->elements[notdef_index],
956 code_table->lengths [notdef_index] );
957 if ( error )
958 goto Fail;
959
960 error = T1_Add_Table( name_table, notdef_index,
961 swap_table->elements[0],
962 swap_table->lengths [0] );
963 if ( error )
964 goto Fail;
965
966 error = T1_Add_Table( code_table, notdef_index,
967 swap_table->elements[1],
968 swap_table->lengths [1] );
969 if ( error )
970 goto Fail;
971
972 error = T1_Add_Table( name_table, 0,
973 swap_table->elements[2],
974 swap_table->lengths [2] );
975 if ( error )
976 goto Fail;
977
978 error = T1_Add_Table( code_table, 0,
979 swap_table->elements[3],
980 swap_table->lengths [3] );
981 if ( error )
982 goto Fail;
983
984 }
985
986 return;
987
988 Fail:
989 parser->root.error = error;
990 }
991
992
993 static FT_Error
994 t42_load_keyword( T42_Face face,
995 T42_Loader loader,
996 T1_Field field )
997 {
998 FT_Error error;
999 void* dummy_object;
1000 void** objects;
1001 FT_UInt max_objects = 0;
1002
1003
1004 /* if the keyword has a dedicated callback, call it */
1005 if ( field->type == T1_FIELD_TYPE_CALLBACK )
1006 {
1007 field->reader( (FT_Face)face, loader );
1008 error = loader->parser.root.error;
1009 goto Exit;
1010 }
1011
1012 /* now the keyword is either a simple field or a table of fields; */
1013 /* we are now going to take care of it */
1014
1015 switch ( field->location )
1016 {
1017 case T1_FIELD_LOCATION_FONT_INFO:
1018 dummy_object = &face->type1.font_info;
1019 break;
1020
1021 case T1_FIELD_LOCATION_FONT_EXTRA:
1022 dummy_object = &face->type1.font_extra;
1023 break;
1024
1025 case T1_FIELD_LOCATION_BBOX:
1026 dummy_object = &face->type1.font_bbox;
1027 break;
1028
1029 default:
1030 dummy_object = &face->type1;
1031 }
1032
1033 objects = &dummy_object;
1034
1035 if ( field->type == T1_FIELD_TYPE_INTEGER_ARRAY ||
1036 field->type == T1_FIELD_TYPE_FIXED_ARRAY )
1037 error = T1_Load_Field_Table( &loader->parser, field,
1038 objects, max_objects, 0 );
1039 else
1040 error = T1_Load_Field( &loader->parser, field,
1041 objects, max_objects, 0 );
1042
1043 Exit:
1044 return error;
1045 }
1046
1047
1048 FT_LOCAL_DEF( FT_Error )
1049 t42_parse_dict( T42_Face face,
1050 T42_Loader loader,
1051 FT_Byte* base,
1052 FT_Long size )
1053 {
1054 T42_Parser parser = &loader->parser;
1055 FT_Byte* limit;
1056 FT_Int n_keywords = (FT_Int)( sizeof ( t42_keywords ) /
1057 sizeof ( t42_keywords[0] ) );
1058
1059
1060 parser->root.cursor = base;
1061 parser->root.limit = base + size;
1062 parser->root.error = FT_Err_Ok;
1063
1064 limit = parser->root.limit;
1065
1066 T1_Skip_Spaces( parser );
1067
1068 while ( parser->root.cursor < limit )
1069 {
1070 FT_Byte* cur;
1071
1072
1073 cur = parser->root.cursor;
1074
1075 /* look for `FontDirectory' which causes problems for some fonts */
1076 if ( *cur == 'F' && cur + 25 < limit &&
1077 ft_strncmp( (char*)cur, "FontDirectory", 13 ) == 0 )
1078 {
1079 FT_Byte* cur2;
1080
1081
1082 /* skip the `FontDirectory' keyword */
1083 T1_Skip_PS_Token( parser );
1084 T1_Skip_Spaces ( parser );
1085 cur = cur2 = parser->root.cursor;
1086
1087 /* look up the `known' keyword */
1088 while ( cur < limit )
1089 {
1090 if ( *cur == 'k' && cur + 5 < limit &&
1091 ft_strncmp( (char*)cur, "known", 5 ) == 0 )
1092 break;
1093
1094 T1_Skip_PS_Token( parser );
1095 if ( parser->root.error )
1096 goto Exit;
1097 T1_Skip_Spaces ( parser );
1098 cur = parser->root.cursor;
1099 }
1100
1101 if ( cur < limit )
1102 {
1103 T1_TokenRec token;
1104
1105
1106 /* skip the `known' keyword and the token following it */
1107 T1_Skip_PS_Token( parser );
1108 T1_ToToken( parser, &token );
1109
1110 /* if the last token was an array, skip it! */
1111 if ( token.type == T1_TOKEN_TYPE_ARRAY )
1112 cur2 = parser->root.cursor;
1113 }
1114 parser->root.cursor = cur2;
1115 }
1116
1117 /* look for immediates */
1118 else if ( *cur == '/' && cur + 2 < limit )
1119 {
1120 FT_PtrDist len;
1121
1122
1123 cur++;
1124
1125 parser->root.cursor = cur;
1126 T1_Skip_PS_Token( parser );
1127 if ( parser->root.error )
1128 goto Exit;
1129
1130 len = parser->root.cursor - cur;
1131
1132 if ( len > 0 && len < 22 && parser->root.cursor < limit )
1133 {
1134 int i;
1135
1136
1137 /* now compare the immediate name to the keyword table */
1138
1139 /* loop through all known keywords */
1140 for ( i = 0; i < n_keywords; i++ )
1141 {
1142 T1_Field keyword = (T1_Field)&t42_keywords[i];
1143 FT_Byte *name = (FT_Byte*)keyword->ident;
1144
1145
1146 if ( !name )
1147 continue;
1148
1149 if ( cur[0] == name[0] &&
1150 len == (FT_PtrDist)ft_strlen( (const char *)name ) &&
1151 ft_memcmp( cur, name, len ) == 0 )
1152 {
1153 /* we found it -- run the parsing callback! */
1154 parser->root.error = t42_load_keyword( face,
1155 loader,
1156 keyword );
1157 if ( parser->root.error )
1158 return parser->root.error;
1159 break;
1160 }
1161 }
1162 }
1163 }
1164 else
1165 {
1166 T1_Skip_PS_Token( parser );
1167 if ( parser->root.error )
1168 goto Exit;
1169 }
1170
1171 T1_Skip_Spaces( parser );
1172 }
1173
1174 Exit:
1175 return parser->root.error;
1176 }
1177
1178
1179 FT_LOCAL_DEF( void )
1180 t42_loader_init( T42_Loader loader,
1181 T42_Face face )
1182 {
1183 FT_UNUSED( face );
1184
1185 FT_MEM_ZERO( loader, sizeof ( *loader ) );
1186 loader->num_glyphs = 0;
1187 loader->num_chars = 0;
1188
1189 /* initialize the tables -- simply set their `init' field to 0 */
1190 loader->encoding_table.init = 0;
1191 loader->charstrings.init = 0;
1192 loader->glyph_names.init = 0;
1193 }
1194
1195
1196 FT_LOCAL_DEF( void )
1197 t42_loader_done( T42_Loader loader )
1198 {
1199 T42_Parser parser = &loader->parser;
1200
1201
1202 /* finalize tables */
1203 T1_Release_Table( &loader->encoding_table );
1204 T1_Release_Table( &loader->charstrings );
1205 T1_Release_Table( &loader->glyph_names );
1206 T1_Release_Table( &loader->swap_table );
1207
1208 /* finalize parser */
1209 t42_parser_done( parser );
1210 }
1211
1212
1213 /* END */
A free Windows-compatible Operating System