1 /***************************************************************************/
2 /* */
3 /* t1load.c */
4 /* */
5 /* Type 1 font loader (body). */
6 /* */
7 /* Copyright 1996-2001 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 /***************************************************************************/
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 /*************************************************************************/
64 #include <ft2build.h>
65 #include FT_INTERNAL_DEBUG_H
66 #include FT_CONFIG_CONFIG_H
67 #include FT_MULTIPLE_MASTERS_H
68 #include FT_INTERNAL_TYPE1_TYPES_H
70 #include "t1load.h"
72 #include "t1errors.h"
74 #include <string.h> /* for strncmp(), strcmp() */
75 #include <ctype.h> /* for isalnum() */
78 /*************************************************************************/
79 /* */
80 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
81 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
82 /* messages during execution. */
83 /* */
84 #undef FT_COMPONENT
85 #define FT_COMPONENT trace_t1load
88 #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
91 /*************************************************************************/
92 /*************************************************************************/
93 /***** *****/
94 /***** MULTIPLE MASTERS SUPPORT *****/
95 /***** *****/
96 /*************************************************************************/
97 /*************************************************************************/
99 static FT_Error
100 t1_allocate_blend( T1_Face face,
101 FT_UInt num_designs,
102 FT_UInt num_axis )
103 {
104 T1_Blend* blend;
105 FT_Memory memory = face->root.memory;
106 FT_Error error = 0;
109 blend = face->blend;
110 if ( !blend )
111 {
112 if ( ALLOC( blend, sizeof ( *blend ) ) )
113 goto Exit;
115 face->blend = blend;
116 }
118 /* allocate design data if needed */
119 if ( num_designs > 0 )
120 {
121 if ( blend->num_designs == 0 )
122 {
123 FT_UInt nn;
126 /* allocate the blend `private' and `font_info' dictionaries */
127 if ( ALLOC_ARRAY( blend->font_infos[1], num_designs, T1_FontInfo ) ||
128 ALLOC_ARRAY( blend->privates[1], num_designs, T1_Private ) ||
129 ALLOC_ARRAY( blend->weight_vector, num_designs * 2, FT_Fixed ) )
130 goto Exit;
132 blend->default_weight_vector = blend->weight_vector + num_designs;
134 blend->font_infos[0] = &face->type1.font_info;
135 blend->privates [0] = &face->type1.private_dict;
137 for ( nn = 2; nn <= num_designs; nn++ )
138 {
139 blend->privates[nn] = blend->privates [nn - 1] + 1;
140 blend->font_infos[nn] = blend->font_infos[nn - 1] + 1;
141 }
143 blend->num_designs = num_designs;
144 }
145 else if ( blend->num_designs != num_designs )
146 goto Fail;
147 }
149 /* allocate axis data if needed */
150 if ( num_axis > 0 )
151 {
152 if ( blend->num_axis != 0 && blend->num_axis != num_axis )
153 goto Fail;
155 blend->num_axis = num_axis;
156 }
158 /* allocate the blend design pos table if needed */
159 num_designs = blend->num_designs;
160 num_axis = blend->num_axis;
161 if ( num_designs && num_axis && blend->design_pos[0] == 0 )
162 {
163 FT_UInt n;
166 if ( ALLOC_ARRAY( blend->design_pos[0],
167 num_designs * num_axis, FT_Fixed ) )
168 goto Exit;
170 for ( n = 1; n < num_designs; n++ )
171 blend->design_pos[n] = blend->design_pos[0] + num_axis * n;
172 }
174 Exit:
175 return error;
177 Fail:
178 error = -1;
179 goto Exit;
180 }
183 FT_LOCAL_DEF FT_Error
184 T1_Get_Multi_Master( T1_Face face,
185 FT_Multi_Master* master )
186 {
187 T1_Blend* blend = face->blend;
188 FT_UInt n;
189 FT_Error error;
192 error = T1_Err_Invalid_Argument;
194 if ( blend )
195 {
196 master->num_axis = blend->num_axis;
197 master->num_designs = blend->num_designs;
199 for ( n = 0; n < blend->num_axis; n++ )
200 {
201 FT_MM_Axis* axis = master->axis + n;
202 T1_DesignMap* map = blend->design_map + n;
205 axis->name = blend->axis_names[n];
206 axis->minimum = map->design_points[0];
207 axis->maximum = map->design_points[map->num_points - 1];
208 }
209 error = 0;
210 }
211 return error;
212 }
215 FT_LOCAL_DEF FT_Error
216 T1_Set_MM_Blend( T1_Face face,
217 FT_UInt num_coords,
218 FT_Fixed* coords )
219 {
220 T1_Blend* blend = face->blend;
221 FT_Error error;
222 FT_UInt n, m;
225 error = T1_Err_Invalid_Argument;
227 if ( blend && blend->num_axis == num_coords )
228 {
229 /* recompute the weight vector from the blend coordinates */
230 error = T1_Err_Ok;
232 for ( n = 0; n < blend->num_designs; n++ )
233 {
234 FT_Fixed result = 0x10000L; /* 1.0 fixed */
237 for ( m = 0; m < blend->num_axis; m++ )
238 {
239 FT_Fixed factor;
242 /* get current blend axis position */
243 factor = coords[m];
244 if ( factor < 0 ) factor = 0;
245 if ( factor > 0x10000L ) factor = 0x10000L;
247 if ( ( n & ( 1 << m ) ) == 0 )
248 factor = 0x10000L - factor;
250 result = FT_MulFix( result, factor );
251 }
252 blend->weight_vector[n] = result;
253 }
255 error = T1_Err_Ok;
256 }
257 return error;
258 }
261 FT_LOCAL_DEF FT_Error
262 T1_Set_MM_Design( T1_Face face,
263 FT_UInt num_coords,
264 FT_Long* coords )
265 {
266 T1_Blend* blend = face->blend;
267 FT_Error error;
268 FT_UInt n, p;
271 error = T1_Err_Invalid_Argument;
272 if ( blend && blend->num_axis == num_coords )
273 {
274 /* compute the blend coordinates through the blend design map */
275 FT_Fixed final_blends[T1_MAX_MM_DESIGNS];
278 for ( n = 0; n < blend->num_axis; n++ )
279 {
280 FT_Long design = coords[n];
281 FT_Fixed the_blend;
282 T1_DesignMap* map = blend->design_map + n;
283 FT_Fixed* designs = map->design_points;
284 FT_Fixed* blends = map->blend_points;
285 FT_Int before = -1, after = -1;
287 for ( p = 0; p < (FT_UInt)map->num_points; p++ )
288 {
289 FT_Fixed p_design = designs[p];
292 /* exact match ? */
293 if ( design == p_design )
294 {
295 the_blend = blends[p];
296 goto Found;
297 }
299 if ( design < p_design )
300 {
301 after = p;
302 break;
303 }
305 before = p;
306 }
308 /* now, interpolate if needed */
309 if ( before < 0 )
310 the_blend = blends[0];
312 else if ( after < 0 )
313 the_blend = blends[map->num_points - 1];
315 else
316 the_blend = FT_MulDiv( design - designs[before],
317 blends [after] - blends [before],
318 designs[after] - designs[before] );
320 Found:
321 final_blends[n] = the_blend;
322 }
324 error = T1_Set_MM_Blend( face, num_coords, final_blends );
325 }
327 return error;
328 }
331 FT_LOCAL_DEF void
332 T1_Done_Blend( T1_Face face )
333 {
334 FT_Memory memory = face->root.memory;
335 T1_Blend* blend = face->blend;
338 if ( blend )
339 {
340 FT_UInt num_designs = blend->num_designs;
341 FT_UInt num_axis = blend->num_axis;
342 FT_UInt n;
345 /* release design pos table */
346 FREE( blend->design_pos[0] );
347 for ( n = 1; n < num_designs; n++ )
348 blend->design_pos[n] = 0;
350 /* release blend `private' and `font info' dictionaries */
351 FREE( blend->privates[1] );
352 FREE( blend->font_infos[1] );
354 for ( n = 0; n < num_designs; n++ )
355 {
356 blend->privates [n] = 0;
357 blend->font_infos[n] = 0;
358 }
360 /* release weight vectors */
361 FREE( blend->weight_vector );
362 blend->default_weight_vector = 0;
364 /* release axis names */
365 for ( n = 0; n < num_axis; n++ )
366 FREE( blend->axis_names[n] );
368 /* release design map */
369 for ( n = 0; n < num_axis; n++ )
370 {
371 T1_DesignMap* dmap = blend->design_map + n;
374 FREE( dmap->design_points );
375 dmap->num_points = 0;
376 }
378 FREE( face->blend );
379 }
380 }
383 static void
384 parse_blend_axis_types( T1_Face face,
385 T1_Loader* loader )
386 {
387 T1_Token axis_tokens[ T1_MAX_MM_AXIS ];
388 FT_Int n, num_axis;
389 FT_Error error = 0;
390 T1_Blend* blend;
391 FT_Memory memory;
394 /* take an array of objects */
395 T1_ToTokenArray( &loader->parser, axis_tokens,
396 T1_MAX_MM_AXIS, &num_axis );
397 if ( num_axis <= 0 || num_axis > T1_MAX_MM_AXIS )
398 {
399 FT_ERROR(( "parse_blend_axis_types: incorrect number of axes: %d\n",
400 num_axis ));
401 error = T1_Err_Invalid_File_Format;
402 goto Exit;
403 }
405 /* allocate blend if necessary */
406 error = t1_allocate_blend( face, 0, (FT_UInt)num_axis );
407 if ( error )
408 goto Exit;
410 blend = face->blend;
411 memory = face->root.memory;
413 /* each token is an immediate containing the name of the axis */
414 for ( n = 0; n < num_axis; n++ )
415 {
416 T1_Token* token = axis_tokens + n;
417 FT_Byte* name;
418 FT_Int len;
420 /* skip first slash, if any */
421 if (token->start[0] == '/')
422 token->start++;
424 len = (FT_Int)( token->limit - token->start );
425 if ( len <= 0 )
426 {
427 error = T1_Err_Invalid_File_Format;
428 goto Exit;
429 }
431 if ( ALLOC( blend->axis_names[n], len + 1 ) )
432 goto Exit;
434 name = (FT_Byte*)blend->axis_names[n];
435 MEM_Copy( name, token->start, len );
436 name[len] = 0;
437 }
439 Exit:
440 loader->parser.root.error = error;
441 }
444 static void
445 parse_blend_design_positions( T1_Face face,
446 T1_Loader* loader )
447 {
448 T1_Token design_tokens[ T1_MAX_MM_DESIGNS ];
449 FT_Int num_designs;
450 FT_Int num_axis;
451 T1_ParserRec* parser = &loader->parser;
453 FT_Error error = 0;
454 T1_Blend* blend;
457 /* get the array of design tokens - compute number of designs */
458 T1_ToTokenArray( parser, design_tokens, T1_MAX_MM_DESIGNS, &num_designs );
459 if ( num_designs <= 0 || num_designs > T1_MAX_MM_DESIGNS )
460 {
461 FT_ERROR(( "parse_blend_design_positions:" ));
462 FT_ERROR(( " incorrect number of designs: %d\n",
463 num_designs ));
464 error = T1_Err_Invalid_File_Format;
465 goto Exit;
466 }
468 {
469 FT_Byte* old_cursor = parser->root.cursor;
470 FT_Byte* old_limit = parser->root.limit;
471 FT_UInt n;
474 blend = face->blend;
475 num_axis = 0; /* make compiler happy */
477 for ( n = 0; n < (FT_UInt)num_designs; n++ )
478 {
479 T1_Token axis_tokens[ T1_MAX_MM_DESIGNS ];
480 T1_Token* token;
481 FT_Int axis, n_axis;
484 /* read axis/coordinates tokens */
485 token = design_tokens + n;
486 parser->root.cursor = token->start - 1;
487 parser->root.limit = token->limit + 1;
488 T1_ToTokenArray( parser, axis_tokens, T1_MAX_MM_AXIS, &n_axis );
490 if ( n == 0 )
491 {
492 num_axis = n_axis;
493 error = t1_allocate_blend( face, num_designs, num_axis );
494 if ( error )
495 goto Exit;
496 blend = face->blend;
497 }
498 else if ( n_axis != num_axis )
499 {
500 FT_ERROR(( "parse_blend_design_positions: incorrect table\n" ));
501 error = T1_Err_Invalid_File_Format;
502 goto Exit;
503 }
505 /* now, read each axis token into the design position */
506 for ( axis = 0; axis < n_axis; axis++ )
507 {
508 T1_Token* token2 = axis_tokens + axis;
511 parser->root.cursor = token2->start;
512 parser->root.limit = token2->limit;
513 blend->design_pos[n][axis] = T1_ToFixed( parser, 0 );
514 }
515 }
517 loader->parser.root.cursor = old_cursor;
518 loader->parser.root.limit = old_limit;
519 }
521 Exit:
522 loader->parser.root.error = error;
523 }
526 static void
527 parse_blend_design_map( T1_Face face,
528 T1_Loader* loader )
529 {
530 FT_Error error = 0;
531 T1_ParserRec* parser = &loader->parser;
532 T1_Blend* blend;
533 T1_Token axis_tokens[ T1_MAX_MM_AXIS ];
534 FT_Int n, num_axis;
535 FT_Byte* old_cursor;
536 FT_Byte* old_limit;
537 FT_Memory memory = face->root.memory;
540 T1_ToTokenArray( parser, axis_tokens, T1_MAX_MM_AXIS, &num_axis );
541 if ( num_axis <= 0 || num_axis > T1_MAX_MM_AXIS )
542 {
543 FT_ERROR(( "parse_blend_design_map: incorrect number of axes: %d\n",
544 num_axis ));
545 error = T1_Err_Invalid_File_Format;
546 goto Exit;
547 }
548 old_cursor = parser->root.cursor;
549 old_limit = parser->root.limit;
551 error = t1_allocate_blend( face, 0, num_axis );
552 if ( error )
553 goto Exit;
554 blend = face->blend;
556 /* now, read each axis design map */
557 for ( n = 0; n < num_axis; n++ )
558 {
559 T1_DesignMap* map = blend->design_map + n;
560 T1_Token* token;
561 FT_Int p, num_points;
564 token = axis_tokens + n;
565 parser->root.cursor = token->start;
566 parser->root.limit = token->limit;
568 /* count the number of map points */
569 {
570 FT_Byte* ptr = token->start;
571 FT_Byte* limit = token->limit;
574 num_points = 0;
575 for ( ; ptr < limit; ptr++ )
576 if ( ptr[0] == '[' )
577 num_points++;
578 }
579 if ( num_points <= 0 || num_points > T1_MAX_MM_MAP_POINTS )
580 {
581 FT_ERROR(( "parse_blend_design_map: incorrect table\n" ));
582 error = T1_Err_Invalid_File_Format;
583 goto Exit;
584 }
586 /* allocate design map data */
587 if ( ALLOC_ARRAY( map->design_points, num_points * 2, FT_Fixed ) )
588 goto Exit;
589 map->blend_points = map->design_points + num_points;
590 map->num_points = (FT_Byte)num_points;
592 for ( p = 0; p < num_points; p++ )
593 {
594 map->design_points[p] = T1_ToInt( parser );
595 map->blend_points [p] = T1_ToFixed( parser, 0 );
596 }
597 }
599 parser->root.cursor = old_cursor;
600 parser->root.limit = old_limit;
602 Exit:
603 parser->root.error = error;
604 }
607 static void
608 parse_weight_vector( T1_Face face,
609 T1_Loader* loader )
610 {
611 FT_Error error = 0;
612 T1_ParserRec* parser = &loader->parser;
613 T1_Blend* blend = face->blend;
614 T1_Token master;
615 FT_UInt n;
616 FT_Byte* old_cursor;
617 FT_Byte* old_limit;
620 if ( !blend || blend->num_designs == 0 )
621 {
622 FT_ERROR(( "parse_weight_vector: too early!\n" ));
623 error = T1_Err_Invalid_File_Format;
624 goto Exit;
625 }
627 T1_ToToken( parser, &master );
628 if ( master.type != t1_token_array )
629 {
630 FT_ERROR(( "parse_weight_vector: incorrect format!\n" ));
631 error = T1_Err_Invalid_File_Format;
632 goto Exit;
633 }
635 old_cursor = parser->root.cursor;
636 old_limit = parser->root.limit;
638 parser->root.cursor = master.start;
639 parser->root.limit = master.limit;
641 for ( n = 0; n < blend->num_designs; n++ )
642 {
643 blend->default_weight_vector[n] =
644 blend->weight_vector[n] = T1_ToFixed( parser, 0 );
645 }
647 parser->root.cursor = old_cursor;
648 parser->root.limit = old_limit;
650 Exit:
651 parser->root.error = error;
652 }
655 /* the keyword `/shareddict' appears in some multiple master fonts */
656 /* with a lot of Postscript garbage behind it (that's completely out */
657 /* of spec!); we detect it and terminate the parsing */
658 /* */
659 static void
660 parse_shared_dict( T1_Face face,
661 T1_Loader* loader )
662 {
663 T1_ParserRec* parser = &loader->parser;
665 FT_UNUSED( face );
668 parser->root.cursor = parser->root.limit;
669 parser->root.error = 0;
670 }
672 #endif /* T1_CONFIG_OPTION_NO_MM_SUPPORT */
675 /*************************************************************************/
676 /*************************************************************************/
677 /***** *****/
678 /***** TYPE 1 SYMBOL PARSING *****/
679 /***** *****/
680 /*************************************************************************/
681 /*************************************************************************/
684 /*************************************************************************/
685 /* */
686 /* First of all, define the token field static variables. This is a set */
687 /* of T1_Field variables used later. */
688 /* */
689 /*************************************************************************/
692 static FT_Error
693 t1_load_keyword( T1_Face face,
694 T1_Loader* loader,
695 T1_Field* field )
696 {
697 FT_Error error;
698 void* dummy_object;
699 void** objects;
700 FT_UInt max_objects;
701 T1_Blend* blend = face->blend;
704 /* if the keyword has a dedicated callback, call it */
705 if ( field->type == t1_field_callback )
706 {
707 field->reader( (FT_Face)face, loader );
708 error = loader->parser.root.error;
709 goto Exit;
710 }
712 /* now, the keyword is either a simple field, or a table of fields; */
713 /* we are now going to take care of it */
714 switch ( field->location )
715 {
716 case t1_field_font_info:
717 dummy_object = &face->type1.font_info;
718 objects = &dummy_object;
719 max_objects = 0;
721 if ( blend )
722 {
723 objects = (void**)blend->font_infos;
724 max_objects = blend->num_designs;
725 }
726 break;
728 case t1_field_private:
729 dummy_object = &face->type1.private_dict;
730 objects = &dummy_object;
731 max_objects = 0;
733 if ( blend )
734 {
735 objects = (void**)blend->privates;
736 max_objects = blend->num_designs;
737 }
738 break;
740 default:
741 dummy_object = &face->type1;
742 objects = &dummy_object;
743 max_objects = 0;
744 }
746 if ( field->type == t1_field_integer_array ||
747 field->type == t1_field_fixed_array )
748 error = T1_Load_Field_Table( &loader->parser, field,
749 objects, max_objects, 0 );
750 else
751 error = T1_Load_Field( &loader->parser, field,
752 objects, max_objects, 0 );
754 Exit:
755 return error;
756 }
759 static int
760 is_space( FT_Byte c )
761 {
762 return ( c == ' ' || c == '\t' || c == '\r' || c == '\n' );
763 }
766 static int
767 is_alpha( FT_Byte c )
768 {
769 /* Note: we must accept "+" as a valid character, as it is used in */
770 /* embedded type1 fonts in PDF documents. */
771 /* */
772 return ( isalnum( c ) || c == '.' || c == '_' || c == '-' || c == '+' );
773 }
776 static int
777 read_binary_data( T1_ParserRec* parser,
778 FT_Int* size,
779 FT_Byte** base )
780 {
781 FT_Byte* cur;
782 FT_Byte* limit = parser->root.limit;
785 /* the binary data has the following format */
786 /* */
787 /* `size' [white*] RD white ....... ND */
788 /* */
790 T1_Skip_Spaces( parser );
791 cur = parser->root.cursor;
793 if ( cur < limit && (FT_Byte)( *cur - '0' ) < 10 )
794 {
795 *size = T1_ToInt( parser );
797 T1_Skip_Spaces( parser );
798 T1_Skip_Alpha ( parser ); /* `RD' or `-|' or something else */
800 /* there is only one whitespace char after the */
801 /* `RD' or `-|' token */
802 *base = parser->root.cursor + 1;
804 parser->root.cursor += *size + 1;
805 return 1;
806 }
808 FT_ERROR(( "read_binary_data: invalid size field\n" ));
809 parser->root.error = T1_Err_Invalid_File_Format;
810 return 0;
811 }
814 /* we will now define the routines used to handle */
815 /* the `/Encoding', `/Subrs', and `/CharStrings' */
816 /* dictionaries */
818 static void
819 parse_font_name( T1_Face face,
820 T1_Loader* loader )
821 {
822 T1_ParserRec* parser = &loader->parser;
823 FT_Error error;
824 FT_Memory memory = parser->root.memory;
825 FT_Int len;
826 FT_Byte* cur;
827 FT_Byte* cur2;
828 FT_Byte* limit;
831 T1_Skip_Spaces( parser );
833 cur = parser->root.cursor;
834 limit = parser->root.limit;
836 if ( cur >= limit - 1 || *cur != '/' )
837 return;
839 cur++;
840 cur2 = cur;
841 while ( cur2 < limit && is_alpha( *cur2 ) )
842 cur2++;
844 len = (FT_Int)( cur2 - cur );
845 if ( len > 0 )
846 {
847 if ( ALLOC( face->type1.font_name, len + 1 ) )
848 {
849 parser->root.error = error;
850 return;
851 }
853 MEM_Copy( face->type1.font_name, cur, len );
854 face->type1.font_name[len] = '\0';
855 }
856 parser->root.cursor = cur2;
857 }
860 static void
861 parse_font_bbox( T1_Face face,
862 T1_Loader* loader )
863 {
864 T1_ParserRec* parser = &loader->parser;
865 FT_Fixed temp[4];
866 FT_BBox* bbox = &face->type1.font_bbox;
869 (void)T1_ToFixedArray( parser, 4, temp, 0 );
870 bbox->xMin = FT_RoundFix( temp[0] );
871 bbox->yMin = FT_RoundFix( temp[1] );
872 bbox->xMax = FT_RoundFix( temp[2] );
873 bbox->yMax = FT_RoundFix( temp[3] );
874 }
877 static void
878 parse_font_matrix( T1_Face face,
879 T1_Loader* loader )
880 {
881 T1_ParserRec* parser = &loader->parser;
882 FT_Matrix* matrix = &face->type1.font_matrix;
883 FT_Vector* offset = &face->type1.font_offset;
884 FT_Face root = (FT_Face)&face->root;
885 FT_Fixed temp[6];
886 FT_Fixed temp_scale;
889 if ( matrix->xx || matrix->yx )
890 /* with synthetic fonts, it's possible we get here twice */
891 return;
893 (void)T1_ToFixedArray( parser, 6, temp, 3 );
895 temp_scale = ABS( temp[3] );
897 /* Set Units per EM based on FontMatrix values. We set the value to */
898 /* 1000 / temp_scale, because temp_scale was already multiplied by */
899 /* 1000 (in t1_tofixed, from psobjs.c). */
901 root->units_per_EM = (FT_UShort)( FT_DivFix( 1000 * 0x10000L,
902 temp_scale ) >> 16 );
904 /* we need to scale the values by 1.0/temp_scale */
905 if ( temp_scale != 0x10000L )
906 {
907 temp[0] = FT_DivFix( temp[0], temp_scale );
908 temp[1] = FT_DivFix( temp[1], temp_scale );
909 temp[2] = FT_DivFix( temp[2], temp_scale );
910 temp[4] = FT_DivFix( temp[4], temp_scale );
911 temp[5] = FT_DivFix( temp[5], temp_scale );
912 temp[3] = 0x10000L;
913 }
915 matrix->xx = temp[0];
916 matrix->yx = temp[1];
917 matrix->xy = temp[2];
918 matrix->yy = temp[3];
920 /* note that the offsets must be expressed in integer font units */
921 offset->x = temp[4] >> 16;
922 offset->y = temp[5] >> 16;
923 }
926 static void
927 parse_encoding( T1_Face face,
928 T1_Loader* loader )
929 {
930 T1_ParserRec* parser = &loader->parser;
931 FT_Byte* cur = parser->root.cursor;
932 FT_Byte* limit = parser->root.limit;
934 PSAux_Interface* psaux = (PSAux_Interface*)face->psaux;
937 /* skip whitespace */
938 while ( is_space( *cur ) )
939 {
940 cur++;
941 if ( cur >= limit )
942 {
943 FT_ERROR(( "parse_encoding: out of bounds!\n" ));
944 parser->root.error = T1_Err_Invalid_File_Format;
945 return;
946 }
947 }
949 /* if we have a number, then the encoding is an array, */
950 /* and we must load it now */
951 if ( (FT_Byte)( *cur - '0' ) < 10 )
952 {
953 T1_Encoding* encode = &face->type1.encoding;
954 FT_Int count, n;
955 PS_Table* char_table = &loader->encoding_table;
956 FT_Memory memory = parser->root.memory;
957 FT_Error error;
960 /* read the number of entries in the encoding, should be 256 */
961 count = T1_ToInt( parser );
962 if ( parser->root.error )
963 return;
965 /* we use a T1_Table to store our charnames */
966 encode->num_chars = count;
967 if ( ALLOC_ARRAY( encode->char_index, count, FT_Short ) ||
968 ALLOC_ARRAY( encode->char_name, count, FT_String* ) ||
969 ( error = psaux->ps_table_funcs->init(
970 char_table, count, memory ) ) != 0 )
971 {
972 parser->root.error = error;
973 return;
974 }
976 /* We need to `zero' out encoding_table.elements */
977 for ( n = 0; n < count; n++ )
978 {
979 char* notdef = (char *)".notdef";
982 T1_Add_Table( char_table, n, notdef, 8 );
983 }
985 /* Now, we will need to read a record of the form */
986 /* ... charcode /charname ... for each entry in our table */
987 /* */
988 /* We simply look for a number followed by an immediate */
989 /* name. Note that this ignores correctly the sequence */
990 /* that is often seen in type1 fonts: */
991 /* */
992 /* 0 1 255 { 1 index exch /.notdef put } for dup */
993 /* */
994 /* used to clean the encoding array before anything else. */
995 /* */
996 /* We stop when we encounter a `def'. */
998 cur = parser->root.cursor;
999 limit = parser->root.limit;
1000 n = 0;
1002 for ( ; cur < limit; )
1003 {
1004 FT_Byte c;
1007 c = *cur;
1009 /* we stop when we encounter a `def' */
1010 if ( c == 'd' && cur + 3 < limit )
1011 {
1012 if ( cur[1] == 'e' &&
1013 cur[2] == 'f' &&
1014 is_space(cur[-1]) &&
1015 is_space(cur[3]) )
1016 {
1017 FT_TRACE6(( "encoding end\n" ));
1018 break;
1019 }
1020 }
1022 /* otherwise, we must find a number before anything else */
1023 if ( (FT_Byte)( c - '0' ) < 10 )
1024 {
1025 FT_Int charcode;
1028 parser->root.cursor = cur;
1029 charcode = T1_ToInt( parser );
1030 cur = parser->root.cursor;
1032 /* skip whitespace */
1033 while ( cur < limit && is_space( *cur ) )
1034 cur++;
1036 if ( cur < limit && *cur == '/' )
1037 {
1038 /* bingo, we have an immediate name -- it must be a */
1039 /* character name */
1040 FT_Byte* cur2 = cur + 1;
1041 FT_Int len;
1044 while ( cur2 < limit && is_alpha( *cur2 ) )
1045 cur2++;
1047 len = (FT_Int)( cur2 - cur - 1 );
1049 parser->root.error = T1_Add_Table( char_table, charcode,
1050 cur + 1, len + 1 );
1051 char_table->elements[charcode][len] = '\0';
1052 if ( parser->root.error )
1053 return;
1055 cur = cur2;
1056 }
1057 }
1058 else
1059 cur++;
1060 }
1062 face->type1.encoding_type = t1_encoding_array;
1063 parser->root.cursor = cur;
1064 }
1065 /* Otherwise, we should have either `StandardEncoding' or */
1066 /* `ExpertEncoding' */
1067 else
1068 {
1069 if ( cur + 17 < limit &&
1070 strncmp( (const char*)cur, "StandardEncoding", 16 ) == 0 )
1071 face->type1.encoding_type = t1_encoding_standard;
1073 else if ( cur + 15 < limit &&
1074 strncmp( (const char*)cur, "ExpertEncoding", 14 ) == 0 )
1075 face->type1.encoding_type = t1_encoding_expert;
1077 else
1078 {
1079 FT_ERROR(( "parse_encoding: invalid token!\n" ));
1080 parser->root.error = T1_Err_Invalid_File_Format;
1081 }
1082 }
1083 }
1086 static void
1087 parse_subrs( T1_Face face,
1088 T1_Loader* loader )
1089 {
1090 T1_ParserRec* parser = &loader->parser;
1091 PS_Table* table = &loader->subrs;
1092 FT_Memory memory = parser->root.memory;
1093 FT_Error error;
1094 FT_Int n;
1096 PSAux_Interface* psaux = (PSAux_Interface*)face->psaux;
1099 loader->num_subrs = T1_ToInt( parser );
1100 if ( parser->root.error )
1101 return;
1103 /* position the parser right before the `dup' of the first subr */
1104 T1_Skip_Spaces( parser );
1105 T1_Skip_Alpha( parser ); /* `array' */
1106 T1_Skip_Spaces( parser );
1108 /* initialize subrs array */
1109 error = psaux->ps_table_funcs->init( table, loader->num_subrs, memory );
1110 if ( error )
1111 goto Fail;
1113 /* the format is simple: */
1114 /* */
1115 /* `index' + binary data */
1116 /* */
1118 for ( n = 0; n < loader->num_subrs; n++ )
1119 {
1120 FT_Int index, size;
1121 FT_Byte* base;
1124 /* If the next token isn't `dup', we are also done. This */
1125 /* happens when there are `holes' in the Subrs array. */
1126 if ( strncmp( (char*)parser->root.cursor, "dup", 3 ) != 0 )
1127 break;
1129 index = T1_ToInt( parser );
1131 if ( !read_binary_data( parser, &size, &base ) )
1132 return;
1134 /* The binary string is followed by one token, e.g. `NP' */
1135 /* (bound to `noaccess put') or by two separate tokens: */
1136 /* `noaccess' & `put'. We position the parser right */
1137 /* before the next `dup', if any. */
1138 T1_Skip_Spaces( parser );
1139 T1_Skip_Alpha( parser ); /* `NP' or `I' or `noaccess' */
1140 T1_Skip_Spaces( parser );
1142 if ( strncmp( (char*)parser->root.cursor, "put", 3 ) == 0 )
1143 {
1144 T1_Skip_Alpha( parser ); /* skip `put' */
1145 T1_Skip_Spaces( parser );
1146 }
1148 /* some fonts use a value of -1 for lenIV to indicate that */
1149 /* the charstrings are unencoded */
1150 /* */
1151 /* thanks to Tom Kacvinsky for pointing this out */
1152 /* */
1153 if ( face->type1.private_dict.lenIV >= 0 )
1154 {
1155 psaux->t1_decrypt( base, size, 4330 );
1156 size -= face->type1.private_dict.lenIV;
1157 base += face->type1.private_dict.lenIV;
1158 }
1160 error = T1_Add_Table( table, index, base, size );
1161 if ( error )
1162 goto Fail;
1163 }
1164 return;
1166 Fail:
1167 parser->root.error = error;
1168 }
1171 static void
1172 parse_charstrings( T1_Face face,
1173 T1_Loader* loader )
1174 {
1175 T1_ParserRec* parser = &loader->parser;
1176 PS_Table* code_table = &loader->charstrings;
1177 PS_Table* name_table = &loader->glyph_names;
1178 PS_Table* swap_table = &loader->swap_table;
1179 FT_Memory memory = parser->root.memory;
1180 FT_Error error;
1182 PSAux_Interface* psaux = (PSAux_Interface*)face->psaux;
1184 FT_Byte* cur;
1185 FT_Byte* limit = parser->root.limit;
1186 FT_Int n;
1187 FT_UInt notdef_index = 0;
1188 FT_Byte notdef_found = 0;
1191 if ( loader->num_glyphs )
1192 /* with synthetic fonts, it's possible we get here twice */
1193 return;
1195 loader->num_glyphs = T1_ToInt( parser );
1196 if ( parser->root.error )
1197 return;
1199 /* initialize tables (leaving room for addition of .notdef, */
1200 /* if necessary). */
1202 error = psaux->ps_table_funcs->init( code_table,
1203 loader->num_glyphs + 1,
1204 memory );
1205 if ( error )
1206 goto Fail;
1208 error = psaux->ps_table_funcs->init( name_table,
1209 loader->num_glyphs + 1,
1210 memory );
1211 if ( error )
1212 goto Fail;
1214 /* Initialize table for swapping index notdef_index and */
1215 /* index 0 names and codes (if necessary). */
1217 error = psaux->ps_table_funcs->init( swap_table, 4, memory );
1219 if ( error )
1220 goto Fail;
1223 n = 0;
1224 for (;;)
1225 {
1226 FT_Int size;
1227 FT_Byte* base;
1230 /* the format is simple: */
1231 /* `/glyphname' + binary data */
1232 /* */
1233 /* note that we stop when we find a `def' */
1234 /* */
1235 T1_Skip_Spaces( parser );
1237 cur = parser->root.cursor;
1238 if ( cur >= limit )
1239 break;
1241 /* we stop when we find a `def' or `end' keyword */
1242 if ( *cur == 'd' &&
1243 cur + 3 < limit &&
1244 cur[1] == 'e' &&
1245 cur[2] == 'f' )
1246 break;
1248 if ( *cur == 'e' &&
1249 cur + 3 < limit &&
1250 cur[1] == 'n' &&
1251 cur[2] == 'd' )
1252 break;
1254 if ( *cur != '/' )
1255 T1_Skip_Alpha( parser );
1256 else
1257 {
1258 FT_Byte* cur2 = cur + 1;
1259 FT_Int len;
1262 while ( cur2 < limit && is_alpha( *cur2 ) )
1263 cur2++;
1264 len = (FT_Int)( cur2 - cur - 1 );
1266 error = T1_Add_Table( name_table, n, cur + 1, len + 1 );
1267 if ( error )
1268 goto Fail;
1270 /* add a trailing zero to the name table */
1271 name_table->elements[n][len] = '\0';
1273 /* record index of /.notdef */
1274 if ( strcmp( (const char*)".notdef",
1275 (const char*)(name_table->elements[n]) ) == 0 )
1276 {
1277 notdef_index = n;
1278 notdef_found = 1;
1279 }
1281 parser->root.cursor = cur2;
1282 if ( !read_binary_data( parser, &size, &base ) )
1283 return;
1285 if ( face->type1.private_dict.lenIV >= 0 )
1286 {
1287 psaux->t1_decrypt( base, size, 4330 );
1288 size -= face->type1.private_dict.lenIV;
1289 base += face->type1.private_dict.lenIV;
1290 }
1292 error = T1_Add_Table( code_table, n, base, size );
1293 if ( error )
1294 goto Fail;
1296 n++;
1297 if ( n >= loader->num_glyphs )
1298 break;
1299 }
1300 }
1302 loader->num_glyphs = n;
1304 /* if /.notdef is found but does not occupy index 0, do our magic. */
1305 if ( strcmp( (const char*)".notdef",
1306 (const char*)name_table->elements[0] ) &&
1307 notdef_found )
1308 {
1309 /* Swap glyph in index 0 with /.notdef glyph. First, add index 0 */
1310 /* name and code entries to swap_table. Then place notdef_index name */
1311 /* and code entries into swap_table. Then swap name and code */
1312 /* entries at indices notdef_index and 0 using values stored in */
1313 /* swap_table. */
1315 /* Index 0 name */
1316 error = T1_Add_Table( swap_table, 0,
1317 name_table->elements[0],
1318 name_table->lengths [0] );
1319 if ( error )
1320 goto Fail;
1322 /* Index 0 code */
1323 error = T1_Add_Table( swap_table, 1,
1324 code_table->elements[0],
1325 code_table->lengths [0] );
1326 if ( error )
1327 goto Fail;
1329 /* Index notdef_index name */
1330 error = T1_Add_Table( swap_table, 2,
1331 name_table->elements[notdef_index],
1332 name_table->lengths [notdef_index] );
1333 if ( error )
1334 goto Fail;
1336 /* Index notdef_index code */
1337 error = T1_Add_Table( swap_table, 3,
1338 code_table->elements[notdef_index],
1339 code_table->lengths [notdef_index] );
1340 if ( error )
1341 goto Fail;
1343 error = T1_Add_Table( name_table, notdef_index,
1344 swap_table->elements[0],
1345 swap_table->lengths [0] );
1346 if ( error )
1347 goto Fail;
1349 error = T1_Add_Table( code_table, notdef_index,
1350 swap_table->elements[1],
1351 swap_table->lengths [1] );
1352 if ( error )
1353 goto Fail;
1355 error = T1_Add_Table( name_table, 0,
1356 swap_table->elements[2],
1357 swap_table->lengths [2] );
1358 if ( error )
1359 goto Fail;
1361 error = T1_Add_Table( code_table, 0,
1362 swap_table->elements[3],
1363 swap_table->lengths [3] );
1364 if ( error )
1365 goto Fail;
1367 }
1368 else if ( !notdef_found )
1369 {
1371 /* notdef_index is already 0, or /.notdef is undefined in */
1372 /* charstrings dictionary. Worry about /.notdef undefined. */
1373 /* We take index 0 and add it to the end of the table(s) */
1374 /* and add our own /.notdef glyph to index 0. */
1376 /* 0 333 hsbw endchar */
1377 FT_Byte notdef_glyph[] = {0x8B, 0xF7, 0xE1, 0x0D, 0x0E};
1378 char* notdef_name = (char *)".notdef";
1381 error = T1_Add_Table( swap_table, 0,
1382 name_table->elements[0],
1383 name_table->lengths [0] );
1384 if ( error )
1385 goto Fail;
1387 error = T1_Add_Table( swap_table, 1,
1388 code_table->elements[0],
1389 code_table->lengths [0] );
1390 if ( error )
1391 goto Fail;
1393 error = T1_Add_Table( name_table, 0, notdef_name, 8 );
1394 if ( error )
1395 goto Fail;
1397 error = T1_Add_Table( code_table, 0, notdef_glyph, 5 );
1399 if ( error )
1400 goto Fail;
1402 error = T1_Add_Table( name_table, n,
1403 swap_table->elements[0],
1404 swap_table->lengths [0] );
1405 if ( error )
1406 goto Fail;
1408 error = T1_Add_Table( code_table, n,
1409 swap_table->elements[1],
1410 swap_table->lengths [1] );
1411 if ( error )
1412 goto Fail;
1414 /* we added a glyph. */
1415 loader->num_glyphs = n + 1;
1417 }
1420 return;
1422 Fail:
1423 parser->root.error = error;
1424 }
1427 static
1428 const T1_Field t1_keywords[] =
1429 {
1431 #include "t1tokens.h"
1433 /* now add the special functions... */
1434 T1_FIELD_CALLBACK( "FontName", parse_font_name )
1435 T1_FIELD_CALLBACK( "FontBBox", parse_font_bbox )
1436 T1_FIELD_CALLBACK( "FontMatrix", parse_font_matrix )
1437 T1_FIELD_CALLBACK( "Encoding", parse_encoding )
1438 T1_FIELD_CALLBACK( "Subrs", parse_subrs )
1439 T1_FIELD_CALLBACK( "CharStrings", parse_charstrings )
1441 #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
1442 T1_FIELD_CALLBACK( "BlendDesignPositions", parse_blend_design_positions )
1443 T1_FIELD_CALLBACK( "BlendDesignMap", parse_blend_design_map )
1444 T1_FIELD_CALLBACK( "BlendAxisTypes", parse_blend_axis_types )
1445 T1_FIELD_CALLBACK( "WeightVector", parse_weight_vector )
1446 T1_FIELD_CALLBACK( "shareddict", parse_shared_dict )
1447 #endif
1449 { 0, t1_field_cid_info, t1_field_none, 0, 0, 0, 0, 0 }
1450 };
1453 static FT_Error
1454 parse_dict( T1_Face face,
1455 T1_Loader* loader,
1456 FT_Byte* base,
1457 FT_Long size )
1458 {
1459 T1_ParserRec* parser = &loader->parser;
1462 parser->root.cursor = base;
1463 parser->root.limit = base + size;
1464 parser->root.error = 0;
1466 {
1467 FT_Byte* cur = base;
1468 FT_Byte* limit = cur + size;
1471 for ( ; cur < limit; cur++ )
1472 {
1473 /* look for `FontDirectory', which causes problems on some fonts */
1474 if ( *cur == 'F' && cur + 25 < limit &&
1475 strncmp( (char*)cur, "FontDirectory", 13 ) == 0 )
1476 {
1477 FT_Byte* cur2;
1480 /* skip the `FontDirectory' keyword */
1481 cur += 13;
1482 cur2 = cur;
1484 /* lookup the `known' keyword */
1485 while ( cur < limit && *cur != 'k' &&
1486 strncmp( (char*)cur, "known", 5 ) )
1487 cur++;
1489 if ( cur < limit )
1490 {
1491 T1_Token token;
1494 /* skip the `known' keyword and the token following it */
1495 cur += 5;
1496 loader->parser.root.cursor = cur;
1497 T1_ToToken( &loader->parser, &token );
1499 /* if the last token was an array, skip it! */
1500 if ( token.type == t1_token_array )
1501 cur2 = parser->root.cursor;
1502 }
1503 cur = cur2;
1504 }
1505 /* look for immediates */
1506 else if ( *cur == '/' && cur + 2 < limit )
1507 {
1508 FT_Byte* cur2;
1509 FT_Int len;
1512 cur++;
1513 cur2 = cur;
1514 while ( cur2 < limit && is_alpha( *cur2 ) )
1515 cur2++;
1517 len = (FT_Int)( cur2 - cur );
1518 if ( len > 0 && len < 22 )
1519 {
1520 {
1521 /* now, compare the immediate name to the keyword table */
1522 T1_Field* keyword = (T1_Field*)t1_keywords;
1525 for (;;)
1526 {
1527 FT_Byte* name;
1530 name = (FT_Byte*)keyword->ident;
1531 if ( !name )
1532 break;
1534 if ( cur[0] == name[0] &&
1535 len == (FT_Int)strlen( (const char*)name ) )
1536 {
1537 FT_Int n;
1540 for ( n = 1; n < len; n++ )
1541 if ( cur[n] != name[n] )
1542 break;
1544 if ( n >= len )
1545 {
1546 /* we found it -- run the parsing callback! */
1547 parser->root.cursor = cur2;
1548 T1_Skip_Spaces( parser );
1549 parser->root.error = t1_load_keyword( face,
1550 loader,
1551 keyword );
1552 if ( parser->root.error )
1553 return parser->root.error;
1555 cur = parser->root.cursor;
1556 break;
1557 }
1558 }
1559 keyword++;
1560 }
1561 }
1562 }
1563 }
1564 }
1565 }
1566 return parser->root.error;
1567 }
1570 static void
1571 t1_init_loader( T1_Loader* loader,
1572 T1_Face face )
1573 {
1574 FT_UNUSED( face );
1576 MEM_Set( loader, 0, sizeof ( *loader ) );
1577 loader->num_glyphs = 0;
1578 loader->num_chars = 0;
1580 /* initialize the tables -- simply set their `init' field to 0 */
1581 loader->encoding_table.init = 0;
1582 loader->charstrings.init = 0;
1583 loader->glyph_names.init = 0;
1584 loader->subrs.init = 0;
1585 loader->swap_table.init = 0;
1586 loader->fontdata = 0;
1587 }
1590 static void
1591 t1_done_loader( T1_Loader* loader )
1592 {
1593 T1_ParserRec* parser = &loader->parser;
1596 /* finalize tables */
1597 T1_Release_Table( &loader->encoding_table );
1598 T1_Release_Table( &loader->charstrings );
1599 T1_Release_Table( &loader->glyph_names );
1600 T1_Release_Table( &loader->swap_table );
1601 T1_Release_Table( &loader->subrs );
1603 /* finalize parser */
1604 T1_Finalize_Parser( parser );
1605 }
1608 FT_LOCAL_DEF FT_Error
1609 T1_Open_Face( T1_Face face )
1610 {
1611 T1_Loader loader;
1612 T1_ParserRec* parser;
1613 T1_Font* type1 = &face->type1;
1614 FT_Error error;
1616 PSAux_Interface* psaux = (PSAux_Interface*)face->psaux;
1619 t1_init_loader( &loader, face );
1621 /* default lenIV */
1622 type1->private_dict.lenIV = 4;
1624 parser = &loader.parser;
1625 error = T1_New_Parser( parser,
1626 face->root.stream,
1627 face->root.memory,
1628 psaux );
1629 if ( error )
1630 goto Exit;
1632 error = parse_dict( face, &loader, parser->base_dict, parser->base_len );
1633 if ( error )
1634 goto Exit;
1636 error = T1_Get_Private_Dict( parser, psaux );
1637 if ( error )
1638 goto Exit;
1640 error = parse_dict( face, &loader, parser->private_dict,
1641 parser->private_len );
1642 if ( error )
1643 goto Exit;
1645 /* now, propagate the subrs, charstrings, and glyphnames tables */
1646 /* to the Type1 data */
1647 type1->num_glyphs = loader.num_glyphs;
1649 if ( loader.subrs.init )
1650 {
1651 loader.subrs.init = 0;
1652 type1->num_subrs = loader.num_subrs;
1653 type1->subrs_block = loader.subrs.block;
1654 type1->subrs = loader.subrs.elements;
1655 type1->subrs_len = loader.subrs.lengths;
1656 }
1658 if ( !loader.charstrings.init )
1659 {
1660 FT_ERROR(( "T1_Open_Face: no charstrings array in face!\n" ));
1661 error = T1_Err_Invalid_File_Format;
1662 }
1664 loader.charstrings.init = 0;
1665 type1->charstrings_block = loader.charstrings.block;
1666 type1->charstrings = loader.charstrings.elements;
1667 type1->charstrings_len = loader.charstrings.lengths;
1669 /* we copy the glyph names `block' and `elements' fields; */
1670 /* the `lengths' field must be released later */
1671 type1->glyph_names_block = loader.glyph_names.block;
1672 type1->glyph_names = (FT_String**)loader.glyph_names.elements;
1673 loader.glyph_names.block = 0;
1674 loader.glyph_names.elements = 0;
1676 /* we must now build type1.encoding when we have a custom */
1677 /* array.. */
1678 if ( type1->encoding_type == t1_encoding_array )
1679 {
1680 FT_Int charcode, index, min_char, max_char;
1681 FT_Byte* char_name;
1682 FT_Byte* glyph_name;
1685 /* OK, we do the following: for each element in the encoding */
1686 /* table, look up the index of the glyph having the same name */
1687 /* the index is then stored in type1.encoding.char_index, and */
1688 /* a the name to type1.encoding.char_name */
1690 min_char = +32000;
1691 max_char = -32000;
1693 charcode = 0;
1694 for ( ; charcode < loader.encoding_table.max_elems; charcode++ )
1695 {
1696 type1->encoding.char_index[charcode] = 0;
1697 type1->encoding.char_name [charcode] = (char *)".notdef";
1699 char_name = loader.encoding_table.elements[charcode];
1700 if ( char_name )
1701 for ( index = 0; index < type1->num_glyphs; index++ )
1702 {
1703 glyph_name = (FT_Byte*)type1->glyph_names[index];
1704 if ( strcmp( (const char*)char_name,
1705 (const char*)glyph_name ) == 0 )
1706 {
1707 type1->encoding.char_index[charcode] = (FT_UShort)index;
1708 type1->encoding.char_name [charcode] = (char*)glyph_name;
1710 /* Change min/max encoded char only if glyph name is */
1711 /* not /.notdef */
1712 if ( strcmp( (const char*)".notdef",
1713 (const char*)glyph_name ) != 0 )
1714 {
1715 if (charcode < min_char) min_char = charcode;
1716 if (charcode > max_char) max_char = charcode;
1717 }
1718 break;
1719 }
1720 }
1721 }
1722 type1->encoding.code_first = min_char;
1723 type1->encoding.code_last = max_char;
1724 type1->encoding.num_chars = loader.num_chars;
1725 }
1727 Exit:
1728 t1_done_loader( &loader );
1729 return error;
1730 }
1733 /* END */