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1/***************************************************************************/
2/* */
3/* z1load.c */
4/* */
5/* Experimental Type 1 font loader (body). */
6/* */
7/* Copyright 1996-2000 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 /*************************************************************************/
20 /* */
21 /* This is the new and improved Type 1 data loader for FreeType 2. The */
22 /* old loader has several problems: it is slow, complex, difficult to */
23 /* maintain, and contains incredible hacks to make it accept some */
24 /* ill-formed Type 1 fonts without hiccup-ing. Moreover, about 5% of */
25 /* the Type 1 fonts on my machine still aren't loaded correctly by it. */
26 /* */
27 /* This version is much simpler, much faster and also easier to read and */
28 /* maintain by a great order of magnitude. The idea behind it is to */
29 /* _not_ try to read the Type 1 token stream with a state machine (i.e. */
30 /* a Postscript-like interpreter) but rather to perform simple pattern */
31 /* matching. */
32 /* */
33 /* Indeed, nearly all data definitions follow a simple pattern like */
34 /* */
35 /* ... /Field <data> ... */
36 /* */
37 /* where <data> can be a number, a boolean, a string, or an array of */
38 /* numbers. There are a few exceptions, namely the encoding, font name, */
39 /* charstrings, and subrs; they are handled with a special pattern */
40 /* matching routine. */
41 /* */
42 /* All other common cases are handled very simply. The matching rules */
43 /* are defined in the file `t1tokens.h' through the use of several */
44 /* macros calls PARSE_XXX. */
45 /* */
46 /* This file is included twice here; the first time to generate parsing */
47 /* callback functions, the second to generate a table of keywords (with */
48 /* pointers to the associated callback). */
49 /* */
50 /* The function `parse_dict' simply scans *linearly* a given dictionary */
51 /* (either the top-level or private one) and calls the appropriate */
52 /* callback when it encounters an immediate keyword. */
53 /* */
54 /* This is by far the fastest way one can find to parse and read all */
55 /* data. */
56 /* */
57 /* This led to tremendous code size reduction. Note that later, the */
58 /* glyph loader will also be _greatly_ simplified, and the automatic */
59 /* hinter will replace the clumsy `t1hinter'. */
60 /* */
61 /*************************************************************************/
62
63
64#include <freetype/internal/ftdebug.h>
65#include <freetype/config/ftconfig.h>
66#include <freetype/ftmm.h>
67
68#include <freetype/internal/t1types.h>
69#include <freetype/internal/t1errors.h>
70
71
72#ifdef FT_FLAT_COMPILE
73
74#include "z1load.h"
75
76#else
77
78#include <type1z/z1load.h>
79
80#endif
81
82
83#include <string.h> /* for strncmp(), strcmp() */
84#include <ctype.h> /* for isalnum() */
85
86
87 /*************************************************************************/
88 /* */
89 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
90 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
91 /* messages during execution. */
92 /* */
93#undef FT_COMPONENT
94#define FT_COMPONENT trace_z1load
95
96
97#ifndef Z1_CONFIG_OPTION_NO_MM_SUPPORT
98
99
100 /*************************************************************************/
101 /*************************************************************************/
102 /***** *****/
103 /***** MULTIPLE MASTERS SUPPORT *****/
104 /***** *****/
105 /*************************************************************************/
106 /*************************************************************************/
107
108 static
109 FT_Error t1_allocate_blend( T1_Face face,
110 FT_UInt num_designs,
111 FT_UInt num_axis )
112 {
113 T1_Blend* blend;
114 FT_Memory memory = face->root.memory;
115 FT_Error error = 0;
116
117
118 blend = face->blend;
119 if ( !blend )
120 {
121 if ( ALLOC( blend, sizeof ( *blend ) ) )
122 goto Exit;
123
124 face->blend = blend;
125 }
126
127 /* allocate design data if needed */
128 if ( num_designs > 0 )
129 {
130 if ( blend->num_designs == 0 )
131 {
132 FT_UInt nn;
133
134
135 /* allocate the blend `private' and `font_info' dictionaries */
136 if ( ALLOC_ARRAY( blend->font_infos[1], num_designs, T1_FontInfo ) ||
137 ALLOC_ARRAY( blend->privates[1], num_designs, T1_Private ) ||
138 ALLOC_ARRAY( blend->weight_vector, num_designs * 2, FT_Fixed ) )
139 goto Exit;
140
141 blend->default_weight_vector = blend->weight_vector + num_designs;
142
143 blend->font_infos[0] = &face->type1.font_info;
144 blend->privates [0] = &face->type1.private_dict;
145
146 for ( nn = 2; nn <= num_designs; nn++ )
147 {
148 blend->privates[nn] = blend->privates [nn - 1] + 1;
149 blend->font_infos[nn] = blend->font_infos[nn - 1] + 1;
150 }
151
152 blend->num_designs = num_designs;
153 }
154 else if ( blend->num_designs != num_designs )
155 goto Fail;
156 }
157
158 /* allocate axis data if needed */
159 if ( num_axis > 0 )
160 {
161 if ( blend->num_axis != 0 && blend->num_axis != num_axis )
162 goto Fail;
163
164 blend->num_axis = num_axis;
165 }
166
167 /* allocate the blend design pos table if needed */
168 num_designs = blend->num_designs;
169 num_axis = blend->num_axis;
170 if ( num_designs && num_axis && blend->design_pos[0] == 0 )
171 {
172 FT_UInt n;
173
174
175 if ( ALLOC_ARRAY( blend->design_pos[0],
176 num_designs * num_axis, FT_Fixed ) )
177 goto Exit;
178
179 for ( n = 1; n < num_designs; n++ )
180 blend->design_pos[n] = blend->design_pos[0] + num_axis * n;
181 }
182
183 Exit:
184 return error;
185
186 Fail:
187 error = -1;
188 goto Exit;
189 }
190
191
192 LOCAL_FUNC
193 FT_Error Z1_Get_Multi_Master( T1_Face face,
194 FT_Multi_Master* master )
195 {
196 T1_Blend* blend = face->blend;
197 FT_UInt n;
198 FT_Error error;
199
200
201 error = T1_Err_Invalid_Argument;
202
203 if ( blend )
204 {
205 master->num_axis = blend->num_axis;
206 master->num_designs = blend->num_designs;
207
208 for ( n = 0; n < blend->num_axis; n++ )
209 {
210 FT_MM_Axis* axis = master->axis + n;
211 T1_DesignMap* map = blend->design_map + n;
212
213
214 axis->name = blend->axis_names[n];
215 axis->minimum = map->design_points[0];
216 axis->maximum = map->design_points[map->num_points - 1];
217 }
218 error = 0;
219 }
220 return error;
221 }
222
223
224 LOCAL_FUNC
225 FT_Error Z1_Set_MM_Blend( T1_Face face,
226 FT_UInt num_coords,
227 FT_Fixed* coords )
228 {
229 T1_Blend* blend = face->blend;
230 FT_Error error;
231 FT_UInt n, m;
232
233
234 error = T1_Err_Invalid_Argument;
235
236 if ( blend && blend->num_axis == num_coords )
237 {
238 /* recompute the weight vector from the blend coordinates */
239 error = FT_Err_Ok;
240
241 for ( n = 0; n < blend->num_designs; n++ )
242 {
243 FT_Fixed result = 0x10000L; /* 1.0 fixed */
244
245
246 for ( m = 0; m < blend->num_axis; m++ )
247 {
248 FT_Fixed factor;
249
250
251 /* get current blend axis position */
252 factor = coords[m];
253 if ( factor < 0 ) factor = 0;
254 if ( factor > 0x10000L ) factor = 0x10000L;
255
256 if ( ( n & ( 1 << m ) ) == 0 )
257 factor = 0x10000L - factor;
258
259 result = FT_MulFix( result, factor );
260 }
261 blend->weight_vector[n] = result;
262 }
263
264 error = FT_Err_Ok;
265 }
266 return error;
267 }
268
269
270 LOCAL_FUNC
271 FT_Error Z1_Set_MM_Design( T1_Face face,
272 FT_UInt num_coords,
273 FT_Long* coords )
274 {
275 T1_Blend* blend = face->blend;
276 FT_Error error;
277 FT_UInt n, p;
278
279
280 error = T1_Err_Invalid_Argument;
281 if ( blend && blend->num_axis == num_coords )
282 {
283 /* compute the blend coordinates through the blend design map */
284 FT_Fixed final_blends[T1_MAX_MM_DESIGNS];
285
286
287 for ( n = 0; n < blend->num_axis; n++ )
288 {
289 FT_Long design = coords[n];
290 FT_Fixed the_blend;
291 T1_DesignMap* map = blend->design_map + n;
292 FT_Fixed* designs = map->design_points;
293 FT_Fixed* blends = map->blend_points;
294 FT_Int before = -1, after = -1;
295
296 for ( p = 0; p < map->num_points; p++ )
297 {
298 FT_Fixed p_design = designs[p];
299
300
301 /* exact match ? */
302 if ( design == p_design )
303 {
304 the_blend = blends[p];
305 goto Found;
306 }
307
308 if ( design < p_design )
309 {
310 after = p;
311 break;
312 }
313
314 before = p;
315 }
316
317 /* now, interpolate if needed */
318 if ( before < 0 )
319 the_blend = blends[0];
320
321 else if ( after < 0 )
322 the_blend = blends[map->num_points - 1];
323
324 else
325 the_blend = FT_MulDiv( design - designs[before],
326 blends [after] - blends [before],
327 designs[after] - designs[before] );
328
329 Found:
330 final_blends[n] = the_blend;
331 }
332
333 error = Z1_Set_MM_Blend( face, num_coords, final_blends );
334 }
335
336 return error;
337 }
338
339
340 LOCAL_FUNC
341 void Z1_Done_Blend( T1_Face face )
342 {
343 FT_Memory memory = face->root.memory;
344 T1_Blend* blend = face->blend;
345
346
347 if ( blend )
348 {
349 FT_UInt num_designs = blend->num_designs;
350 FT_UInt num_axis = blend->num_axis;
351 FT_UInt n;
352
353
354 /* release design pos table */
355 FREE( blend->design_pos[0] );
356 for ( n = 1; n < num_designs; n++ )
357 blend->design_pos[n] = 0;
358
359 /* release blend `private' and `font info' dictionaries */
360 FREE( blend->privates[1] );
361 FREE( blend->font_infos[1] );
362
363 for ( n = 0; n < num_designs; n++ )
364 {
365 blend->privates [n] = 0;
366 blend->font_infos[n] = 0;
367 }
368
369 /* release weight vectors */
370 FREE( blend->weight_vector );
371 blend->default_weight_vector = 0;
372
373 /* release axis names */
374 for ( n = 0; n < num_axis; n++ )
375 FREE( blend->axis_names[n] );
376
377 /* release design map */
378 for ( n = 0; n < num_axis; n++ )
379 {
380 T1_DesignMap* dmap = blend->design_map + n;
381
382
383 FREE( dmap->design_points );
384 dmap->num_points = 0;
385 }
386
387 FREE( face->blend );
388 }
389 }
390
391
392 static
393 void parse_blend_axis_types( T1_Face face,
394 Z1_Loader* loader )
395 {
396 Z1_Token_Rec axis_tokens[ T1_MAX_MM_AXIS ];
397 FT_Int n, num_axis;
398 FT_Error error = 0;
399 T1_Blend* blend;
400 FT_Memory memory;
401
402
403 /* take an array of objects */
404 Z1_ToTokenArray( &loader->parser, axis_tokens,
405 T1_MAX_MM_AXIS, &num_axis );
406 if ( num_axis <= 0 || num_axis > T1_MAX_MM_AXIS )
407 {
408 FT_ERROR(( "parse_blend_axis_types: incorrect number of axes: %d\n",
409 num_axis ));
410 error = T1_Err_Invalid_File_Format;
411 goto Exit;
412 }
413
414 /* allocate blend if necessary */
415 error = t1_allocate_blend( face, 0, (FT_UInt)num_axis );
416 if ( error )
417 goto Exit;
418
419 blend = face->blend;
420 memory = face->root.memory;
421
422 /* each token is an immediate containing the name of the axis */
423 for ( n = 0; n < num_axis; n++ )
424 {
425 Z1_Token_Rec* token = axis_tokens + n;
426 FT_Byte* name;
427 FT_Int len;
428
429 /* skip first slash, if any */
430 if (token->start[0] == '/')
431 token->start++;
432
433 len = token->limit - token->start;
434 if ( len <= 0 )
435 {
436 error = T1_Err_Invalid_File_Format;
437 goto Exit;
438 }
439
440 if ( ALLOC( blend->axis_names[n], len + 1 ) )
441 goto Exit;
442
443 name = (FT_Byte*)blend->axis_names[n];
444 MEM_Copy( name, token->start, len );
445 name[len] = 0;
446 }
447
448 Exit:
449 loader->parser.error = error;
450 }
451
452
453 static
454 void parse_blend_design_positions( T1_Face face,
455 Z1_Loader* loader )
456 {
457 Z1_Token_Rec design_tokens[ T1_MAX_MM_DESIGNS ];
458 FT_Int num_designs;
459 FT_Int num_axis;
460 Z1_Parser* parser = &loader->parser;
461
462 FT_Error error = 0;
463 T1_Blend* blend;
464
465
466 /* get the array of design tokens - compute number of designs */
467 Z1_ToTokenArray( parser, design_tokens, T1_MAX_MM_DESIGNS, &num_designs );
468 if ( num_designs <= 0 || num_designs > T1_MAX_MM_DESIGNS )
469 {
470 FT_ERROR(( "parse_blend_design_positions:" ));
471 FT_ERROR(( " incorrect number of designs: %d\n",
472 num_designs ));
473 error = T1_Err_Invalid_File_Format;
474 goto Exit;
475 }
476
477 {
478 FT_Byte* old_cursor = parser->cursor;
479 FT_Byte* old_limit = parser->limit;
480 FT_UInt n;
481
482
483 blend = face->blend;
484 num_axis = 0; /* make compiler happy */
485
486 for ( n = 0; n < (FT_UInt)num_designs; n++ )
487 {
488 Z1_Token_Rec axis_tokens[ T1_MAX_MM_DESIGNS ];
489 Z1_Token_Rec* token;
490 FT_Int axis, n_axis;
491
492
493 /* read axis/coordinates tokens */
494 token = design_tokens + n;
495 parser->cursor = token->start - 1;
496 parser->limit = token->limit + 1;
497 Z1_ToTokenArray( parser, axis_tokens, T1_MAX_MM_AXIS, &n_axis );
498
499 if ( n == 0 )
500 {
501 num_axis = n_axis;
502 error = t1_allocate_blend( face, num_designs, num_axis );
503 if ( error )
504 goto Exit;
505 blend = face->blend;
506 }
507 else if ( n_axis != num_axis )
508 {
509 FT_ERROR(( "parse_blend_design_positions: incorrect table\n" ));
510 error = T1_Err_Invalid_File_Format;
511 goto Exit;
512 }
513
514 /* now, read each axis token into the design position */
515 for ( axis = 0; axis < n_axis; axis++ )
516 {
517 Z1_Token_Rec* token2 = axis_tokens + axis;
518
519
520 parser->cursor = token2->start;
521 parser->limit = token2->limit;
522 blend->design_pos[n][axis] = Z1_ToFixed( parser, 0 );
523 }
524 }
525
526 loader->parser.cursor = old_cursor;
527 loader->parser.limit = old_limit;
528 }
529
530 Exit:
531 loader->parser.error = error;
532 }
533
534
535 static
536 void parse_blend_design_map( T1_Face face,
537 Z1_Loader* loader )
538 {
539 FT_Error error = 0;
540 Z1_Parser* parser = &loader->parser;
541 T1_Blend* blend;
542 Z1_Token_Rec axis_tokens[ T1_MAX_MM_AXIS ];
543 FT_Int n, num_axis;
544 FT_Byte* old_cursor;
545 FT_Byte* old_limit;
546 FT_Memory memory = face->root.memory;
547
548
549 Z1_ToTokenArray( parser, axis_tokens, T1_MAX_MM_AXIS, &num_axis );
550 if ( num_axis <= 0 || num_axis > T1_MAX_MM_AXIS )
551 {
552 FT_ERROR(( "parse_blend_design_map: incorrect number of axes: %d\n",
553 num_axis ));
554 error = T1_Err_Invalid_File_Format;
555 goto Exit;
556 }
557 old_cursor = parser->cursor;
558 old_limit = parser->limit;
559
560 error = t1_allocate_blend( face, 0, num_axis );
561 if ( error )
562 goto Exit;
563 blend = face->blend;
564
565 /* now, read each axis design map */
566 for ( n = 0; n < num_axis; n++ )
567 {
568 T1_DesignMap* map = blend->design_map + n;
569 Z1_Token_Rec* token;
570 FT_Int p, num_points;
571
572
573 token = axis_tokens + n;
574 parser->cursor = token->start;
575 parser->limit = token->limit;
576
577 /* count the number of map points */
578 {
579 FT_Byte* p = token->start;
580 FT_Byte* limit = token->limit;
581
582
583 num_points = 0;
584 for ( ; p < limit; p++ )
585 if ( p[0] == '[' )
586 num_points++;
587 }
588 if ( num_points <= 0 || num_points > T1_MAX_MM_MAP_POINTS )
589 {
590 FT_ERROR(( "parse_blend_design_map: incorrect table\n" ));
591 error = T1_Err_Invalid_File_Format;
592 goto Exit;
593 }
594
595 /* allocate design map data */
596 if ( ALLOC_ARRAY( map->design_points, num_points * 2, FT_Fixed ) )
597 goto Exit;
598 map->blend_points = map->design_points + num_points;
599 map->num_points = (FT_Byte)num_points;
600
601 for ( p = 0; p < num_points; p++ )
602 {
603 map->design_points[p] = Z1_ToInt( parser );
604 map->blend_points [p] = Z1_ToFixed( parser, 0 );
605 }
606 }
607
608 parser->cursor = old_cursor;
609 parser->limit = old_limit;
610
611 Exit:
612 parser->error = error;
613 }
614
615
616 static
617 void parse_weight_vector( T1_Face face,
618 Z1_Loader* loader )
619 {
620 FT_Error error = 0;
621 Z1_Parser* parser = &loader->parser;
622 T1_Blend* blend = face->blend;
623 Z1_Token_Rec master;
624 FT_UInt n;
625 FT_Byte* old_cursor;
626 FT_Byte* old_limit;
627
628
629 if ( !blend || blend->num_designs == 0 )
630 {
631 FT_ERROR(( "parse_weight_vector: too early!\n" ));
632 error = T1_Err_Invalid_File_Format;
633 goto Exit;
634 }
635
636 Z1_ToToken( parser, &master );
637 if ( master.type != t1_token_array )
638 {
639 FT_ERROR(( "parse_weight_vector: incorrect format!\n" ));
640 error = T1_Err_Invalid_File_Format;
641 goto Exit;
642 }
643
644 old_cursor = parser->cursor;
645 old_limit = parser->limit;
646
647 parser->cursor = master.start;
648 parser->limit = master.limit;
649
650 for ( n = 0; n < blend->num_designs; n++ )
651 {
652 blend->default_weight_vector[n] =
653 blend->weight_vector[n] = Z1_ToFixed( parser, 0 );
654 }
655
656 parser->cursor = old_cursor;
657 parser->limit = old_limit;
658
659 Exit:
660 parser->error = error;
661 }
662
663
664 /* the keyword `/shareddict' appears in some multiple master fonts */
665 /* with a lot of Postscript garbage behind it (that's completely out */
666 /* of spec!); we detect it and terminate the parsing */
667 /* */
668 static
669 void parse_shared_dict( T1_Face face,
670 Z1_Loader* loader )
671 {
672 Z1_Parser* parser = &loader->parser;
673
674 FT_UNUSED( face );
675
676
677 parser->cursor = parser->limit;
678 parser->error = 0;
679 }
680
681#endif /* Z1_CONFIG_OPTION_NO_MM_SUPPORT */
682
683
684 /*************************************************************************/
685 /*************************************************************************/
686 /***** *****/
687 /***** TYPE 1 SYMBOL PARSING *****/
688 /***** *****/
689 /*************************************************************************/
690 /*************************************************************************/
691
692
693 /*************************************************************************/
694 /* */
695 /* First of all, define the token field static variables. This is a set */
696 /* of Z1_Field_Rec variables used later. */
697 /* */
698 /*************************************************************************/
699
700#define Z1_NEW_STRING( _name, _field ) \
701 static \
702 const Z1_Field_Rec t1_field_ ## _field = \
703 Z1_FIELD_STRING( T1TYPE, _field );
704
705#define Z1_NEW_BOOL( _name, _field ) \
706 static \
707 const Z1_Field_Rec t1_field_ ## _field = \
708 Z1_FIELD_BOOL( T1TYPE, _field );
709
710#define Z1_NEW_NUM( _name, _field ) \
711 static \
712 const Z1_Field_Rec t1_field_ ## _field = \
713 Z1_FIELD_NUM( T1TYPE, _field );
714
715#define Z1_NEW_FIXED( _name, _field ) \
716 static \
717 const Z1_Field_Rec t1_field_ ## _field = \
718 Z1_FIELD_FIXED( T1TYPE, _field, _power );
719
720#define Z1_NEW_NUM_TABLE( _name, _field, _max, _count ) \
721 static \
722 const Z1_Field_Rec t1_field_ ## _field = \
723 Z1_FIELD_NUM_ARRAY( T1TYPE, _field, _count, _max );
724
725#define Z1_NEW_FIXED_TABLE( _name, _field, _max, _count ) \
726 static \
727 const Z1_Field_Rec t1_field_ ## _field = \
728 Z1_FIELD_FIXED_ARRAY( T1TYPE, _field, _count, _max );
729
730#define Z1_NEW_NUM_TABLE2( _name, _field, _max ) \
731 static \
732 const Z1_Field_Rec t1_field_ ## _field = \
733 Z1_FIELD_NUM_ARRAY2( T1TYPE, _field, _max );
734
735#define Z1_NEW_FIXED_TABLE2( _name, _field, _max ) \
736 static \
737 const Z1_Field_Rec t1_field_ ## _field = \
738 Z1_FIELD_FIXED_ARRAY2( T1TYPE, _field, _max );
739
740
741#define Z1_FONTINFO_STRING( n, f ) Z1_NEW_STRING( n, f )
742#define Z1_FONTINFO_NUM( n, f ) Z1_NEW_NUM( n, f )
743#define Z1_FONTINFO_BOOL( n, f ) Z1_NEW_BOOL( n, f )
744#define Z1_PRIVATE_NUM( n, f ) Z1_NEW_NUM( n, f )
745#define Z1_PRIVATE_FIXED( n, f ) Z1_NEW_FIXED( n, f )
746#define Z1_PRIVATE_NUM_TABLE( n, f, m, c ) Z1_NEW_NUM_TABLE( n, f, m, c )
747#define Z1_PRIVATE_NUM_TABLE2( n, f, m ) Z1_NEW_NUM_TABLE2( n, f, m )
748#define Z1_TOPDICT_NUM( n, f ) Z1_NEW_NUM( n, f )
749#define Z1_TOPDICT_NUM_FIXED2( n, f, m ) Z1_NEW_FIXED_TABLE2( n, f, m )
750
751
752 /* including this file defines all field variables */
753#ifdef FT_FLAT_COMPILE
754
755#include "z1tokens.h"
756
757#else
758
759#include <type1z/z1tokens.h>
760
761#endif
762
763
764 /*************************************************************************/
765 /* */
766 /* Second, define the keyword variables. This is a set of Z1_KeyWord */
767 /* structures used to model the way each keyword is `loaded'. */
768 /* */
769 /*************************************************************************/
770
771 typedef void (*Z1_Parse_Func)( T1_Face face,
772 Z1_Loader* loader );
773
774
775 typedef enum Z1_KeyWord_Type_
776 {
777 t1_keyword_callback = 0,
778 t1_keyword_field,
779 t1_keyword_field_table
780
781 } Z1_KeyWord_Type;
782
783
784 typedef enum Z1_KeyWord_Location_
785 {
786 t1_keyword_type1 = 0,
787 t1_keyword_font_info,
788 t1_keyword_private
789
790 } Z1_KeyWord_Location;
791
792
793 typedef struct Z1_KeyWord_
794 {
795 const char* name;
796 Z1_KeyWord_Type type;
797 Z1_KeyWord_Location location;
798 Z1_Parse_Func parsing;
799 const Z1_Field_Rec* field;
800
801 } Z1_KeyWord;
802
803
804#define Z1_KEYWORD_CALLBACK( name, callback ) \
805 { \
806 name, t1_keyword_callback, t1_keyword_type1, callback, 0 \
807 }
808
809#define Z1_KEYWORD_TYPE1( name, f ) \
810 { \
811 name, t1_keyword_field, t1_keyword_type1, 0, &t1_field_ ## f \
812 }
813
814#define Z1_KEYWORD_FONTINFO( name, f ) \
815 { \
816 name, t1_keyword_field, t1_keyword_font_info, 0, &t1_field_ ## f \
817 }
818
819#define Z1_KEYWORD_PRIVATE( name, f ) \
820 { \
821 name, t1_keyword_field, t1_keyword_private, 0, &t1_field_ ## f \
822 }
823
824#define Z1_KEYWORD_FONTINFO_TABLE( name, f ) \
825 { \
826 name, t1_keyword_field_table, t1_keyword_font_info, 0, \
827 &t1_field_ ## f \
828 }
829
830#define Z1_KEYWORD_PRIVATE_TABLE( name, f ) \
831 { \
832 name, t1_keyword_field_table, t1_keyword_private, 0, \
833 &t1_field_ ## f \
834 }
835
836
837#undef Z1_FONTINFO_STRING
838#undef Z1_FONTINFO_NUM
839#undef Z1_FONTINFO_BOOL
840#undef Z1_PRIVATE_NUM
841#undef Z1_PRIVATE_FIXED
842#undef Z1_PRIVATE_NUM_TABLE
843#undef Z1_PRIVATE_NUM_TABLE2
844#undef Z1_TOPDICT_NUM
845#undef Z1_TOPDICT_NUM_FIXED2
846
847#define Z1_FONTINFO_STRING( n, f ) Z1_KEYWORD_FONTINFO( n, f ),
848#define Z1_FONTINFO_NUM( n, f ) Z1_KEYWORD_FONTINFO( n, f ),
849#define Z1_FONTINFO_BOOL( n, f ) Z1_KEYWORD_FONTINFO( n, f ),
850#define Z1_PRIVATE_NUM( n, f ) Z1_KEYWORD_PRIVATE( n, f ),
851#define Z1_PRIVATE_FIXED( n, f ) Z1_KEYWORD_PRIVATE( n, f ),
852#define Z1_PRIVATE_NUM_TABLE( n, f, m, c ) Z1_KEYWORD_PRIVATE_TABLE( n, f ),
853#define Z1_PRIVATE_NUM_TABLE2( n, f, m ) Z1_KEYWORD_PRIVATE_TABLE( n, f ),
854#define Z1_TOPDICT_NUM( n, f ) Z1_KEYWORD_TYPE1( n, f ),
855#define Z1_TOPDICT_NUM_FIXED2( n, f, m ) Z1_KEYWORD_TYPE1( n, f ),
856
857
858 static
859 FT_Error t1_load_keyword( T1_Face face,
860 Z1_Loader* loader,
861 Z1_KeyWord* keyword )
862 {
863 FT_Error error;
864 void* dummy_object;
865 void** objects;
866 FT_UInt max_objects;
867 T1_Blend* blend = face->blend;
868
869
870 /* if the keyword has a dedicated callback, call it */
871 if ( keyword->type == t1_keyword_callback )
872 {
873 keyword->parsing( face, loader );
874 error = loader->parser.error;
875 goto Exit;
876 }
877
878 /* now, the keyword is either a simple field, or a table of fields; */
879 /* we are now going to take care of it */
880 switch ( keyword->location )
881 {
882 case t1_keyword_font_info:
883 dummy_object = &face->type1.font_info;
884 objects = &dummy_object;
885 max_objects = 0;
886
887 if ( blend )
888 {
889 objects = (void**)blend->font_infos;
890 max_objects = blend->num_designs;
891 }
892 break;
893
894 case t1_keyword_private:
895 dummy_object = &face->type1.private_dict;
896 objects = &dummy_object;
897 max_objects = 0;
898
899 if ( blend )
900 {
901 objects = (void**)blend->privates;
902 max_objects = blend->num_designs;
903 }
904 break;
905
906 default:
907 dummy_object = &face->type1;
908 objects = &dummy_object;
909 max_objects = 0;
910 }
911
912 if ( keyword->type == t1_keyword_field_table )
913 error = Z1_Load_Field_Table( &loader->parser, keyword->field,
914 objects, max_objects, 0 );
915 else
916 error = Z1_Load_Field( &loader->parser, keyword->field,
917 objects, max_objects, 0 );
918
919 Exit:
920 return error;
921 }
922
923
924 static
925 int is_space( char c )
926 {
927 return ( c == ' ' || c == '\t' || c == '\r' || c == '\n' );
928 }
929
930
931 static
932 int is_alpha( char c )
933 {
934 return ( isalnum( c ) ||
935 ( c == '.' ) ||
936 ( c == '_' ) );
937 }
938
939
940 static
941 void skip_whitespace( Z1_Parser* parser )
942 {
943 FT_Byte* cur = parser->cursor;
944
945
946 while ( cur < parser->limit && is_space( *cur ) )
947 cur++;
948
949 parser->cursor = cur;
950 }
951
952
953 static
954 void skip_blackspace( Z1_Parser* parser )
955 {
956 FT_Byte* cur = parser->cursor;
957
958 while ( cur < parser->limit && !is_space( *cur ) )
959 cur++;
960
961 parser->cursor = cur;
962 }
963
964
965 static
966 int read_binary_data( Z1_Parser* parser,
967 FT_Int* size,
968 FT_Byte** base )
969 {
970 FT_Byte* cur;
971 FT_Byte* limit = parser->limit;
972
973
974 /* the binary data has the following format */
975 /* */
976 /* `size' [white*] RD white ....... ND */
977 /* */
978
979 skip_whitespace( parser );
980 cur = parser->cursor;
981
982 if ( cur < limit && (FT_Byte)( *cur - '0' ) < 10 )
983 {
984 *size = Z1_ToInt( parser );
985
986 skip_whitespace( parser );
987 skip_blackspace( parser ); /* `RD' or `-|' or something else */
988
989 /* there is only one whitespace char after the */
990 /* `RD' or `-|' token */
991 *base = parser->cursor + 1;
992
993 parser->cursor += *size+1;
994 return 1;
995 }
996
997 FT_ERROR(( "read_binary_data: invalid size field\n" ));
998 parser->error = T1_Err_Invalid_File_Format;
999 return 0;
1000 }
1001
1002
1003 /* we will now define the routines used to handle */
1004 /* the `/Encoding', `/Subrs', and `/CharStrings' */
1005 /* dictionaries */
1006
1007 static
1008 void parse_font_name( T1_Face face,
1009 Z1_Loader* loader )
1010 {
1011 Z1_Parser* parser = &loader->parser;
1012 FT_Error error;
1013 FT_Memory memory = parser->memory;
1014 FT_Int len;
1015 FT_Byte* cur;
1016 FT_Byte* cur2;
1017 FT_Byte* limit;
1018
1019
1020 skip_whitespace( parser );
1021
1022 cur = parser->cursor;
1023 limit = parser->limit;
1024
1025 if ( cur >= limit - 1 || *cur != '/' )
1026 return;
1027
1028 cur++;
1029 cur2 = cur;
1030 while ( cur2 < limit && is_alpha( *cur2 ) )
1031 cur2++;
1032
1033 len = cur2 - cur;
1034 if ( len > 0 )
1035 {
1036 if ( ALLOC( face->type1.font_name, len + 1 ) )
1037 {
1038 parser->error = error;
1039 return;
1040 }
1041
1042 MEM_Copy( face->type1.font_name, cur, len );
1043 face->type1.font_name[len] = '\0';
1044 }
1045 parser->cursor = cur2;
1046 }
1047
1048
1049 static
1050 void parse_font_bbox( T1_Face face,
1051 Z1_Loader* loader )
1052 {
1053 Z1_Parser* parser = &loader->parser;
1054 FT_Short temp[4];
1055 FT_BBox* bbox = &face->type1.font_bbox;
1056
1057
1058 (void)Z1_ToCoordArray( parser, 4, temp );
1059 bbox->xMin = temp[0];
1060 bbox->yMin = temp[1];
1061 bbox->xMax = temp[2];
1062 bbox->yMax = temp[3];
1063 }
1064
1065
1066 static
1067 void parse_font_matrix( T1_Face face,
1068 Z1_Loader* loader )
1069 {
1070 Z1_Parser* parser = &loader->parser;
1071 FT_Matrix* matrix = &face->type1.font_matrix;
1072 FT_Fixed temp[4];
1073
1074
1075 (void)Z1_ToFixedArray( parser, 4, temp, 3 );
1076 matrix->xx = temp[0];
1077 matrix->yx = temp[1];
1078 matrix->xy = temp[2];
1079 matrix->yy = temp[3];
1080 }
1081
1082
1083 static
1084 void parse_encoding( T1_Face face,
1085 Z1_Loader* loader )
1086 {
1087 Z1_Parser* parser = &loader->parser;
1088 FT_Byte* cur = parser->cursor;
1089 FT_Byte* limit = parser->limit;
1090
1091
1092 /* skip whitespace */
1093 while ( is_space( *cur ) )
1094 {
1095 cur++;
1096 if ( cur >= limit )
1097 {
1098 FT_ERROR(( "parse_encoding: out of bounds!\n" ));
1099 parser->error = T1_Err_Invalid_File_Format;
1100 return;
1101 }
1102 }
1103
1104 /* if we have a number, then the encoding is an array, */
1105 /* and we must load it now */
1106 if ( (FT_Byte)( *cur - '0' ) < 10 )
1107 {
1108 T1_Encoding* encode = &face->type1.encoding;
1109 FT_Int count, n;
1110 Z1_Table* char_table = &loader->encoding_table;
1111 FT_Memory memory = parser->memory;
1112 FT_Error error;
1113
1114
1115 /* read the number of entries in the encoding, should be 256 */
1116 count = Z1_ToInt( parser );
1117 if ( parser->error )
1118 return;
1119
1120 /* we use a Z1_Table to store our charnames */
1121 encode->num_chars = count;
1122 if ( ALLOC_ARRAY( encode->char_index, count, FT_Short ) ||
1123 ALLOC_ARRAY( encode->char_name, count, FT_String* ) ||
1124 ( error = Z1_New_Table( char_table, count, memory ) ) != 0 )
1125 {
1126 parser->error = error;
1127 return;
1128 }
1129
1130 /* Now, we will need to read a record of the form */
1131 /* ... charcode /charname ... for each entry in our table */
1132 /* */
1133 /* We simply look for a number followed by an immediate */
1134 /* name. Note that this ignores correctly the sequence */
1135 /* that is often seen in type1 fonts: */
1136 /* */
1137 /* 0 1 255 { 1 index exch /.notdef put } for dup */
1138 /* */
1139 /* used to clean the encoding array before anything else. */
1140 /* */
1141 /* We stop when we encounter a `def'. */
1142
1143 cur = parser->cursor;
1144 limit = parser->limit;
1145 n = 0;
1146
1147 for ( ; cur < limit; )
1148 {
1149 FT_Byte c;
1150
1151
1152 c = *cur;
1153
1154 /* we stop when we encounter a `def' */
1155 if ( c == 'd' && cur + 3 < limit )
1156 {
1157 if ( cur[1] == 'e' &&
1158 cur[2] == 'f' &&
1159 is_space(cur[-1]) &&
1160 is_space(cur[3]) )
1161 {
1162 FT_TRACE6(( "encoding end\n" ));
1163 break;
1164 }
1165 }
1166
1167 /* otherwise, we must find a number before anything else */
1168 if ( (FT_Byte)( c - '0' ) < 10 )
1169 {
1170 FT_Int charcode;
1171
1172
1173 parser->cursor = cur;
1174 charcode = Z1_ToInt( parser );
1175 cur = parser->cursor;
1176
1177 /* skip whitespace */
1178 while ( cur < limit && is_space( *cur ) )
1179 cur++;
1180
1181 if ( cur < limit && *cur == '/' )
1182 {
1183 /* bingo, we have an immediate name -- it must be a */
1184 /* character name */
1185 FT_Byte* cur2 = cur + 1;
1186 FT_Int len;
1187
1188
1189 while ( cur2 < limit && is_alpha( *cur2 ) )
1190 cur2++;
1191
1192 len = cur2 - cur - 1;
1193
1194 parser->error = Z1_Add_Table( char_table, charcode,
1195 cur + 1, len + 1 );
1196 char_table->elements[charcode][len] = '\0';
1197 if ( parser->error )
1198 return;
1199
1200 cur = cur2;
1201 }
1202 }
1203 else
1204 cur++;
1205 }
1206
1207 face->type1.encoding_type = t1_encoding_array;
1208 parser->cursor = cur;
1209 }
1210 /* Otherwise, we should have either `StandardEncoding' or */
1211 /* `ExpertEncoding' */
1212 else
1213 {
1214 if ( cur + 17 < limit &&
1215 strncmp( (const char*)cur, "StandardEncoding", 16 ) == 0 )
1216 face->type1.encoding_type = t1_encoding_standard;
1217
1218 else if ( cur + 15 < limit &&
1219 strncmp( (const char*)cur, "ExpertEncoding", 14 ) == 0 )
1220 face->type1.encoding_type = t1_encoding_expert;
1221
1222 else
1223 {
1224 FT_ERROR(( "parse_encoding: invalid token!\n" ));
1225 parser->error = T1_Err_Invalid_File_Format;
1226 }
1227 }
1228 }
1229
1230
1231 static
1232 void parse_subrs( T1_Face face,
1233 Z1_Loader* loader )
1234 {
1235 Z1_Parser* parser = &loader->parser;
1236 Z1_Table* table = &loader->subrs;
1237 FT_Memory memory = parser->memory;
1238 FT_Error error;
1239 FT_Int n;
1240
1241
1242 loader->num_subrs = Z1_ToInt( parser );
1243 if ( parser->error )
1244 return;
1245
1246 /* position the parser right before the `dup' of the first subr */
1247 skip_whitespace( parser );
1248 skip_blackspace( parser ); /* `array' */
1249 skip_whitespace( parser );
1250
1251 /* initialize subrs array */
1252 error = Z1_New_Table( table, loader->num_subrs, memory );
1253 if ( error )
1254 goto Fail;
1255
1256 /* the format is simple: */
1257 /* */
1258 /* `index' + binary data */
1259 /* */
1260
1261 for ( n = 0; n < loader->num_subrs; n++ )
1262 {
1263 FT_Int index, size;
1264 FT_Byte* base;
1265
1266
1267 /* If the next token isn't `dup', we are also done. This */
1268 /* happens when there are `holes' in the Subrs array. */
1269 if ( strncmp( (char*)parser->cursor, "dup", 3 ) != 0 )
1270 break;
1271
1272 index = Z1_ToInt( parser );
1273
1274 if ( !read_binary_data( parser, &size, &base ) )
1275 return;
1276
1277 /* The binary string is followed by one token, e.g. `NP' */
1278 /* (bound to `noaccess put') or by two separate tokens: */
1279 /* `noaccess' & `put'. We position the parser right */
1280 /* before the next `dup', if any. */
1281 skip_whitespace( parser );
1282 skip_blackspace( parser ); /* `NP' or `I' or `noaccess' */
1283 skip_whitespace( parser );
1284
1285 if ( strncmp( (char*)parser->cursor, "put", 3 ) == 0 )
1286 {
1287 skip_blackspace( parser ); /* skip `put' */
1288 skip_whitespace( parser );
1289 }
1290
1291 /* some fonts use a value of -1 for lenIV to indicate that */
1292 /* the charstrings are unencoded */
1293 /* */
1294 /* thanks to Tom Kacvinsky for pointing this out */
1295 /* */
1296 if ( face->type1.private_dict.lenIV >= 0 )
1297 {
1298 Z1_Decrypt( base, size, 4330 );
1299 size -= face->type1.private_dict.lenIV;
1300 base += face->type1.private_dict.lenIV;
1301 }
1302
1303 error = Z1_Add_Table( table, index, base, size );
1304 if ( error )
1305 goto Fail;
1306 }
1307 return;
1308
1309 Fail:
1310 parser->error = error;
1311 }
1312
1313
1314 static
1315 void parse_charstrings( T1_Face face,
1316 Z1_Loader* loader )
1317 {
1318 Z1_Parser* parser = &loader->parser;
1319 Z1_Table* code_table = &loader->charstrings;
1320 Z1_Table* name_table = &loader->glyph_names;
1321 FT_Memory memory = parser->memory;
1322 FT_Error error;
1323
1324 FT_Byte* cur;
1325 FT_Byte* limit = parser->limit;
1326 FT_Int n;
1327
1328
1329 loader->num_glyphs = Z1_ToInt( parser );
1330 if ( parser->error )
1331 return;
1332
1333 /* initialize tables */
1334 error = Z1_New_Table( code_table, loader->num_glyphs, memory ) ||
1335 Z1_New_Table( name_table, loader->num_glyphs, memory );
1336 if ( error )
1337 goto Fail;
1338
1339 n = 0;
1340 for (;;)
1341 {
1342 FT_Int size;
1343 FT_Byte* base;
1344
1345
1346 /* the format is simple: */
1347 /* `/glyphname' + binary data */
1348 /* */
1349 /* note that we stop when we find a `def' */
1350 /* */
1351 skip_whitespace( parser );
1352
1353 cur = parser->cursor;
1354 if ( cur >= limit )
1355 break;
1356
1357 /* we stop when we find a `def' or `end' keyword */
1358 if ( *cur == 'd' &&
1359 cur + 3 < limit &&
1360 cur[1] == 'e' &&
1361 cur[2] == 'f' )
1362 break;
1363
1364 if ( *cur == 'e' &&
1365 cur + 3 < limit &&
1366 cur[1] == 'n' &&
1367 cur[2] == 'd' )
1368 break;
1369
1370 if ( *cur != '/' )
1371 skip_blackspace( parser );
1372 else
1373 {
1374 FT_Byte* cur2 = cur + 1;
1375 FT_Int len;
1376
1377
1378 while ( cur2 < limit && is_alpha( *cur2 ) )
1379 cur2++;
1380 len = cur2 - cur - 1;
1381
1382 error = Z1_Add_Table( name_table, n, cur + 1, len + 1 );
1383 if ( error )
1384 goto Fail;
1385
1386 /* add a trailing zero to the name table */
1387 name_table->elements[n][len] = '\0';
1388
1389 parser->cursor = cur2;
1390 if ( !read_binary_data( parser, &size, &base ) )
1391 return;
1392
1393 if ( face->type1.private_dict.lenIV >= 0 )
1394 {
1395 Z1_Decrypt( base, size, 4330 );
1396 size -= face->type1.private_dict.lenIV;
1397 base += face->type1.private_dict.lenIV;
1398 }
1399
1400 error = Z1_Add_Table( code_table, n, base, size );
1401 if ( error )
1402 goto Fail;
1403
1404 n++;
1405 if ( n >= loader->num_glyphs )
1406 break;
1407 }
1408 }
1409 loader->num_glyphs = n;
1410 return;
1411
1412 Fail:
1413 parser->error = error;
1414 }
1415
1416
1417 static
1418 const Z1_KeyWord t1_keywords[] =
1419 {
1420
1421#ifdef FT_FLAT_COMPILE
1422
1423#include "z1tokens.h"
1424
1425#else
1426
1427#include <type1z/z1tokens.h>
1428
1429#endif
1430
1431 /* now add the special functions... */
1432 Z1_KEYWORD_CALLBACK( "FontName", parse_font_name ),
1433 Z1_KEYWORD_CALLBACK( "FontBBox", parse_font_bbox ),
1434 Z1_KEYWORD_CALLBACK( "FontMatrix", parse_font_matrix ),
1435 Z1_KEYWORD_CALLBACK( "Encoding", parse_encoding ),
1436 Z1_KEYWORD_CALLBACK( "Subrs", parse_subrs ),
1437 Z1_KEYWORD_CALLBACK( "CharStrings", parse_charstrings ),
1438
1439#ifndef Z1_CONFIG_OPTION_NO_MM_SUPPORT
1440 Z1_KEYWORD_CALLBACK( "BlendDesignPositions", parse_blend_design_positions ),
1441 Z1_KEYWORD_CALLBACK( "BlendDesignMap", parse_blend_design_map ),
1442 Z1_KEYWORD_CALLBACK( "BlendAxisTypes", parse_blend_axis_types ),
1443 Z1_KEYWORD_CALLBACK( "WeightVector", parse_weight_vector ),
1444 Z1_KEYWORD_CALLBACK( "shareddict", parse_shared_dict ),
1445#endif
1446
1447 Z1_KEYWORD_CALLBACK( 0, 0 )
1448 };
1449
1450
1451 static
1452 FT_Error parse_dict( T1_Face face,
1453 Z1_Loader* loader,
1454 FT_Byte* base,
1455 FT_Long size )
1456 {
1457 Z1_Parser* parser = &loader->parser;
1458
1459
1460 parser->cursor = base;
1461 parser->limit = base + size;
1462 parser->error = 0;
1463
1464 {
1465 FT_Byte* cur = base;
1466 FT_Byte* limit = cur + size;
1467
1468
1469 for ( ; cur < limit; cur++ )
1470 {
1471 /* look for `FontDirectory', which causes problems on some fonts */
1472 if ( *cur == 'F' && cur + 25 < limit &&
1473 strncmp( (char*)cur, "FontDirectory", 13 ) == 0 )
1474 {
1475 FT_Byte* cur2;
1476
1477
1478 /* skip the `FontDirectory' keyword */
1479 cur += 13;
1480 cur2 = cur;
1481
1482 /* lookup the `known' keyword */
1483 while ( cur < limit && *cur != 'k' &&
1484 strncmp( (char*)cur, "known", 5 ) )
1485 cur++;
1486
1487 if ( cur < limit )
1488 {
1489 Z1_Token_Rec token;
1490
1491
1492 /* skip the `known' keyword and the token following it */
1493 cur += 5;
1494 loader->parser.cursor = cur;
1495 Z1_ToToken( &loader->parser, &token );
1496
1497 /* if the last token was an array, skip it! */
1498 if ( token.type == t1_token_array )
1499 cur2 = parser->cursor;
1500 }
1501 cur = cur2;
1502 }
1503 /* look for immediates */
1504 else if ( *cur == '/' && cur + 2 < limit )
1505 {
1506 FT_Byte* cur2;
1507 FT_Int len;
1508
1509
1510 cur++;
1511 cur2 = cur;
1512 while ( cur2 < limit && is_alpha( *cur2 ) )
1513 cur2++;
1514
1515 len = cur2 - cur;
1516 if ( len > 0 && len < 22 )
1517 {
1518 if ( !loader->fontdata )
1519 {
1520 if ( strncmp( (char*)cur, "FontInfo", 8 ) == 0 )
1521 loader->fontdata = 1;
1522 }
1523 else
1524 {
1525 /* now, compare the immediate name to the keyword table */
1526 Z1_KeyWord* keyword = (Z1_KeyWord*)t1_keywords;
1527
1528
1529 for (;;)
1530 {
1531 FT_Byte* name;
1532
1533
1534 name = (FT_Byte*)keyword->name;
1535 if ( !name )
1536 break;
1537
1538 if ( cur[0] == name[0] &&
1539 len == (FT_Int)strlen( (const char*)name ) )
1540 {
1541 FT_Int n;
1542
1543
1544 for ( n = 1; n < len; n++ )
1545 if ( cur[n] != name[n] )
1546 break;
1547
1548 if ( n >= len )
1549 {
1550 /* we found it -- run the parsing callback! */
1551 parser->cursor = cur2;
1552 skip_whitespace( parser );
1553 parser->error = t1_load_keyword( face, loader, keyword );
1554 if ( parser->error )
1555 return parser->error;
1556
1557 cur = parser->cursor;
1558 break;
1559 }
1560 }
1561 keyword++;
1562 }
1563 }
1564 }
1565 }
1566 }
1567 }
1568 return parser->error;
1569 }
1570
1571
1572 static
1573 void t1_init_loader( Z1_Loader* loader,
1574 T1_Face face )
1575 {
1576 FT_UNUSED( face );
1577
1578 MEM_Set( loader, 0, sizeof ( *loader ) );
1579 loader->num_glyphs = 0;
1580 loader->num_chars = 0;
1581
1582 /* initialize the tables -- simply set their `init' field to 0 */
1583 loader->encoding_table.init = 0;
1584 loader->charstrings.init = 0;
1585 loader->glyph_names.init = 0;
1586 loader->subrs.init = 0;
1587 loader->fontdata = 0;
1588 }
1589
1590
1591 static
1592 void t1_done_loader( Z1_Loader* loader )
1593 {
1594 Z1_Parser* parser = &loader->parser;
1595
1596
1597 /* finalize tables */
1598 Z1_Release_Table( &loader->encoding_table );
1599 Z1_Release_Table( &loader->charstrings );
1600 Z1_Release_Table( &loader->glyph_names );
1601 Z1_Release_Table( &loader->subrs );
1602
1603 /* finalize parser */
1604 Z1_Done_Parser( parser );
1605 }
1606
1607
1608 LOCAL_FUNC
1609 FT_Error Z1_Open_Face( T1_Face face )
1610 {
1611 Z1_Loader loader;
1612 Z1_Parser* parser;
1613 T1_Font* type1 = &face->type1;
1614 FT_Error error;
1615
1616
1617 t1_init_loader( &loader, face );
1618
1619 /* default lenIV */
1620 type1->private_dict.lenIV = 4;
1621
1622 parser = &loader.parser;
1623 error = Z1_New_Parser( parser, face->root.stream, face->root.memory );
1624 if ( error )
1625 goto Exit;
1626
1627 error = parse_dict( face, &loader, parser->base_dict, parser->base_len );
1628 if ( error )
1629 goto Exit;
1630
1631 error = Z1_Get_Private_Dict( parser );
1632 if ( error )
1633 goto Exit;
1634
1635 error = parse_dict( face, &loader, parser->private_dict,
1636 parser->private_len );
1637 if ( error )
1638 goto Exit;
1639
1640 /* now, propagate the subrs, charstrings, and glyphnames tables */
1641 /* to the Type1 data */
1642 type1->num_glyphs = loader.num_glyphs;
1643
1644 if ( !loader.subrs.init )
1645 {
1646 FT_ERROR(( "Z1_Open_Face: no subrs array in face!\n" ));
1647 error = T1_Err_Invalid_File_Format;
1648 }
1649
1650 if ( !loader.charstrings.init )
1651 {
1652 FT_ERROR(( "Z1_Open_Face: no charstrings array in face!\n" ));
1653 error = T1_Err_Invalid_File_Format;
1654 }
1655
1656 loader.subrs.init = 0;
1657 type1->num_subrs = loader.num_subrs;
1658 type1->subrs_block = loader.subrs.block;
1659 type1->subrs = loader.subrs.elements;
1660 type1->subrs_len = loader.subrs.lengths;
1661
1662 loader.charstrings.init = 0;
1663 type1->charstrings_block = loader.charstrings.block;
1664 type1->charstrings = loader.charstrings.elements;
1665 type1->charstrings_len = loader.charstrings.lengths;
1666
1667 /* we copy the glyph names `block' and `elements' fields; */
1668 /* the `lengths' field must be released later */
1669 type1->glyph_names_block = loader.glyph_names.block;
1670 type1->glyph_names = (FT_String**)loader.glyph_names.elements;
1671 loader.glyph_names.block = 0;
1672 loader.glyph_names.elements = 0;
1673
1674 /* we must now build type1.encoding when we have a custom */
1675 /* array.. */
1676 if ( type1->encoding_type == t1_encoding_array )
1677 {
1678 FT_Int charcode, index, min_char, max_char;
1679 FT_Byte* char_name;
1680 FT_Byte* glyph_name;
1681
1682
1683 /* OK, we do the following: for each element in the encoding */
1684 /* table, look up the index of the glyph having the same name */
1685 /* the index is then stored in type1.encoding.char_index, and */
1686 /* a the name to type1.encoding.char_name */
1687
1688 min_char = +32000;
1689 max_char = -32000;
1690
1691 charcode = 0;
1692 for ( ; charcode < loader.encoding_table.num_elems; charcode++ )
1693 {
1694 type1->encoding.char_index[charcode] = 0;
1695 type1->encoding.char_name [charcode] = ".notdef";
1696
1697 char_name = loader.encoding_table.elements[charcode];
1698 if ( char_name )
1699 for ( index = 0; index < type1->num_glyphs; index++ )
1700 {
1701 glyph_name = (FT_Byte*)type1->glyph_names[index];
1702 if ( strcmp( (const char*)char_name,
1703 (const char*)glyph_name ) == 0 )
1704 {
1705 type1->encoding.char_index[charcode] = index;
1706 type1->encoding.char_name [charcode] = (char*)glyph_name;
1707
1708 if (charcode < min_char) min_char = charcode;
1709 if (charcode > max_char) max_char = charcode;
1710 break;
1711 }
1712 }
1713 }
1714 type1->encoding.code_first = min_char;
1715 type1->encoding.code_last = max_char;
1716 type1->encoding.num_chars = loader.num_chars;
1717 }
1718
1719 Exit:
1720 t1_done_loader( &loader );
1721 return error;
1722 }
1723
1724
1725/* END */
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