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[FREETYPE]
[reactos.git] / reactos / lib / 3rdparty / freetype / src / type42 / t42objs.c
1 /***************************************************************************/
2 /* */
3 /* t42objs.c */
4 /* */
5 /* Type 42 objects manager (body). */
6 /* */
7 /* Copyright 2002-2009, 2011, 2013 */
8 /* by 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 "t42objs.h"
20 #include "t42parse.h"
21 #include "t42error.h"
22 #include FT_INTERNAL_DEBUG_H
23 #include FT_LIST_H
24 #include FT_TRUETYPE_IDS_H
25
26
27 #undef FT_COMPONENT
28 #define FT_COMPONENT trace_t42
29
30
31 static FT_Error
32 T42_Open_Face( T42_Face face )
33 {
34 T42_LoaderRec loader;
35 T42_Parser parser;
36 T1_Font type1 = &face->type1;
37 FT_Memory memory = face->root.memory;
38 FT_Error error;
39
40 PSAux_Service psaux = (PSAux_Service)face->psaux;
41
42
43 t42_loader_init( &loader, face );
44
45 parser = &loader.parser;
46
47 if ( FT_ALLOC( face->ttf_data, 12 ) )
48 goto Exit;
49
50 error = t42_parser_init( parser,
51 face->root.stream,
52 memory,
53 psaux);
54 if ( error )
55 goto Exit;
56
57 error = t42_parse_dict( face, &loader,
58 parser->base_dict, parser->base_len );
59 if ( error )
60 goto Exit;
61
62 if ( type1->font_type != 42 )
63 {
64 FT_ERROR(( "T42_Open_Face: cannot handle FontType %d\n",
65 type1->font_type ));
66 error = FT_THROW( Unknown_File_Format );
67 goto Exit;
68 }
69
70 /* now, propagate the charstrings and glyphnames tables */
71 /* to the Type1 data */
72 type1->num_glyphs = loader.num_glyphs;
73
74 if ( !loader.charstrings.init )
75 {
76 FT_ERROR(( "T42_Open_Face: no charstrings array in face\n" ));
77 error = FT_THROW( Invalid_File_Format );
78 }
79
80 loader.charstrings.init = 0;
81 type1->charstrings_block = loader.charstrings.block;
82 type1->charstrings = loader.charstrings.elements;
83 type1->charstrings_len = loader.charstrings.lengths;
84
85 /* we copy the glyph names `block' and `elements' fields; */
86 /* the `lengths' field must be released later */
87 type1->glyph_names_block = loader.glyph_names.block;
88 type1->glyph_names = (FT_String**)loader.glyph_names.elements;
89 loader.glyph_names.block = 0;
90 loader.glyph_names.elements = 0;
91
92 /* we must now build type1.encoding when we have a custom array */
93 if ( type1->encoding_type == T1_ENCODING_TYPE_ARRAY )
94 {
95 FT_Int charcode, idx, min_char, max_char;
96 FT_Byte* glyph_name;
97
98
99 /* OK, we do the following: for each element in the encoding */
100 /* table, look up the index of the glyph having the same name */
101 /* as defined in the CharStrings array. */
102 /* The index is then stored in type1.encoding.char_index, and */
103 /* the name in type1.encoding.char_name */
104
105 min_char = 0;
106 max_char = 0;
107
108 charcode = 0;
109 for ( ; charcode < loader.encoding_table.max_elems; charcode++ )
110 {
111 FT_Byte* char_name;
112
113
114 type1->encoding.char_index[charcode] = 0;
115 type1->encoding.char_name [charcode] = (char *)".notdef";
116
117 char_name = loader.encoding_table.elements[charcode];
118 if ( char_name )
119 for ( idx = 0; idx < type1->num_glyphs; idx++ )
120 {
121 glyph_name = (FT_Byte*)type1->glyph_names[idx];
122 if ( ft_strcmp( (const char*)char_name,
123 (const char*)glyph_name ) == 0 )
124 {
125 type1->encoding.char_index[charcode] = (FT_UShort)idx;
126 type1->encoding.char_name [charcode] = (char*)glyph_name;
127
128 /* Change min/max encoded char only if glyph name is */
129 /* not /.notdef */
130 if ( ft_strcmp( (const char*)".notdef",
131 (const char*)glyph_name ) != 0 )
132 {
133 if ( charcode < min_char )
134 min_char = charcode;
135 if ( charcode >= max_char )
136 max_char = charcode + 1;
137 }
138 break;
139 }
140 }
141 }
142
143 type1->encoding.code_first = min_char;
144 type1->encoding.code_last = max_char;
145 type1->encoding.num_chars = loader.num_chars;
146 }
147
148 Exit:
149 t42_loader_done( &loader );
150 return error;
151 }
152
153
154 /***************** Driver Functions *************/
155
156
157 FT_LOCAL_DEF( FT_Error )
158 T42_Face_Init( FT_Stream stream,
159 FT_Face t42face, /* T42_Face */
160 FT_Int face_index,
161 FT_Int num_params,
162 FT_Parameter* params )
163 {
164 T42_Face face = (T42_Face)t42face;
165 FT_Error error;
166 FT_Service_PsCMaps psnames;
167 PSAux_Service psaux;
168 FT_Face root = (FT_Face)&face->root;
169 T1_Font type1 = &face->type1;
170 PS_FontInfo info = &type1->font_info;
171
172 FT_UNUSED( num_params );
173 FT_UNUSED( params );
174 FT_UNUSED( face_index );
175 FT_UNUSED( stream );
176
177
178 face->ttf_face = NULL;
179 face->root.num_faces = 1;
180
181 FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
182 face->psnames = psnames;
183
184 face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
185 "psaux" );
186 psaux = (PSAux_Service)face->psaux;
187 if ( !psaux )
188 {
189 FT_ERROR(( "T42_Face_Init: cannot access `psaux' module\n" ));
190 error = FT_THROW( Missing_Module );
191 goto Exit;
192 }
193
194 FT_TRACE2(( "Type 42 driver\n" ));
195
196 /* open the tokenizer, this will also check the font format */
197 error = T42_Open_Face( face );
198 if ( error )
199 goto Exit;
200
201 /* if we just wanted to check the format, leave successfully now */
202 if ( face_index < 0 )
203 goto Exit;
204
205 /* check the face index */
206 if ( face_index > 0 )
207 {
208 FT_ERROR(( "T42_Face_Init: invalid face index\n" ));
209 error = FT_THROW( Invalid_Argument );
210 goto Exit;
211 }
212
213 /* Now load the font program into the face object */
214
215 /* Init the face object fields */
216 /* Now set up root face fields */
217
218 root->num_glyphs = type1->num_glyphs;
219 root->num_charmaps = 0;
220 root->face_index = 0;
221
222 root->face_flags = FT_FACE_FLAG_SCALABLE |
223 FT_FACE_FLAG_HORIZONTAL |
224 FT_FACE_FLAG_GLYPH_NAMES;
225
226 if ( info->is_fixed_pitch )
227 root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
228
229 /* We only set this flag if we have the patented bytecode interpreter. */
230 /* There are no known `tricky' Type42 fonts that could be loaded with */
231 /* the unpatented interpreter. */
232 #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
233 root->face_flags |= FT_FACE_FLAG_HINTER;
234 #endif
235
236 /* XXX: TODO -- add kerning with .afm support */
237
238 /* get style name -- be careful, some broken fonts only */
239 /* have a `/FontName' dictionary entry! */
240 root->family_name = info->family_name;
241 /* assume "Regular" style if we don't know better */
242 root->style_name = (char *)"Regular";
243 if ( root->family_name )
244 {
245 char* full = info->full_name;
246 char* family = root->family_name;
247
248
249 if ( full )
250 {
251 while ( *full )
252 {
253 if ( *full == *family )
254 {
255 family++;
256 full++;
257 }
258 else
259 {
260 if ( *full == ' ' || *full == '-' )
261 full++;
262 else if ( *family == ' ' || *family == '-' )
263 family++;
264 else
265 {
266 if ( !*family )
267 root->style_name = full;
268 break;
269 }
270 }
271 }
272 }
273 }
274 else
275 {
276 /* do we have a `/FontName'? */
277 if ( type1->font_name )
278 root->family_name = type1->font_name;
279 }
280
281 /* no embedded bitmap support */
282 root->num_fixed_sizes = 0;
283 root->available_sizes = 0;
284
285 /* Load the TTF font embedded in the T42 font */
286 {
287 FT_Open_Args args;
288
289
290 args.flags = FT_OPEN_MEMORY;
291 args.memory_base = face->ttf_data;
292 args.memory_size = face->ttf_size;
293
294 if ( num_params )
295 {
296 args.flags |= FT_OPEN_PARAMS;
297 args.num_params = num_params;
298 args.params = params;
299 }
300
301 error = FT_Open_Face( FT_FACE_LIBRARY( face ),
302 &args, 0, &face->ttf_face );
303 }
304
305 if ( error )
306 goto Exit;
307
308 FT_Done_Size( face->ttf_face->size );
309
310 /* Ignore info in FontInfo dictionary and use the info from the */
311 /* loaded TTF font. The PostScript interpreter also ignores it. */
312 root->bbox = face->ttf_face->bbox;
313 root->units_per_EM = face->ttf_face->units_per_EM;
314
315 root->ascender = face->ttf_face->ascender;
316 root->descender = face->ttf_face->descender;
317 root->height = face->ttf_face->height;
318
319 root->max_advance_width = face->ttf_face->max_advance_width;
320 root->max_advance_height = face->ttf_face->max_advance_height;
321
322 root->underline_position = (FT_Short)info->underline_position;
323 root->underline_thickness = (FT_Short)info->underline_thickness;
324
325 /* compute style flags */
326 root->style_flags = 0;
327 if ( info->italic_angle )
328 root->style_flags |= FT_STYLE_FLAG_ITALIC;
329
330 if ( face->ttf_face->style_flags & FT_STYLE_FLAG_BOLD )
331 root->style_flags |= FT_STYLE_FLAG_BOLD;
332
333 if ( face->ttf_face->face_flags & FT_FACE_FLAG_VERTICAL )
334 root->face_flags |= FT_FACE_FLAG_VERTICAL;
335
336 {
337 if ( psnames )
338 {
339 FT_CharMapRec charmap;
340 T1_CMap_Classes cmap_classes = psaux->t1_cmap_classes;
341 FT_CMap_Class clazz;
342
343
344 charmap.face = root;
345
346 /* first of all, try to synthesize a Unicode charmap */
347 charmap.platform_id = TT_PLATFORM_MICROSOFT;
348 charmap.encoding_id = TT_MS_ID_UNICODE_CS;
349 charmap.encoding = FT_ENCODING_UNICODE;
350
351 error = FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL );
352 if ( error &&
353 FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) )
354 goto Exit;
355 error = FT_Err_Ok;
356
357 /* now, generate an Adobe Standard encoding when appropriate */
358 charmap.platform_id = TT_PLATFORM_ADOBE;
359 clazz = NULL;
360
361 switch ( type1->encoding_type )
362 {
363 case T1_ENCODING_TYPE_STANDARD:
364 charmap.encoding = FT_ENCODING_ADOBE_STANDARD;
365 charmap.encoding_id = TT_ADOBE_ID_STANDARD;
366 clazz = cmap_classes->standard;
367 break;
368
369 case T1_ENCODING_TYPE_EXPERT:
370 charmap.encoding = FT_ENCODING_ADOBE_EXPERT;
371 charmap.encoding_id = TT_ADOBE_ID_EXPERT;
372 clazz = cmap_classes->expert;
373 break;
374
375 case T1_ENCODING_TYPE_ARRAY:
376 charmap.encoding = FT_ENCODING_ADOBE_CUSTOM;
377 charmap.encoding_id = TT_ADOBE_ID_CUSTOM;
378 clazz = cmap_classes->custom;
379 break;
380
381 case T1_ENCODING_TYPE_ISOLATIN1:
382 charmap.encoding = FT_ENCODING_ADOBE_LATIN_1;
383 charmap.encoding_id = TT_ADOBE_ID_LATIN_1;
384 clazz = cmap_classes->unicode;
385 break;
386
387 default:
388 ;
389 }
390
391 if ( clazz )
392 error = FT_CMap_New( clazz, NULL, &charmap, NULL );
393
394 #if 0
395 /* Select default charmap */
396 if ( root->num_charmaps )
397 root->charmap = root->charmaps[0];
398 #endif
399 }
400 }
401 Exit:
402 return error;
403 }
404
405
406 FT_LOCAL_DEF( void )
407 T42_Face_Done( FT_Face t42face )
408 {
409 T42_Face face = (T42_Face)t42face;
410 T1_Font type1;
411 PS_FontInfo info;
412 FT_Memory memory;
413
414
415 if ( !face )
416 return;
417
418 type1 = &face->type1;
419 info = &type1->font_info;
420 memory = face->root.memory;
421
422 /* delete internal ttf face prior to freeing face->ttf_data */
423 if ( face->ttf_face )
424 FT_Done_Face( face->ttf_face );
425
426 /* release font info strings */
427 FT_FREE( info->version );
428 FT_FREE( info->notice );
429 FT_FREE( info->full_name );
430 FT_FREE( info->family_name );
431 FT_FREE( info->weight );
432
433 /* release top dictionary */
434 FT_FREE( type1->charstrings_len );
435 FT_FREE( type1->charstrings );
436 FT_FREE( type1->glyph_names );
437
438 FT_FREE( type1->charstrings_block );
439 FT_FREE( type1->glyph_names_block );
440
441 FT_FREE( type1->encoding.char_index );
442 FT_FREE( type1->encoding.char_name );
443 FT_FREE( type1->font_name );
444
445 FT_FREE( face->ttf_data );
446
447 #if 0
448 /* release afm data if present */
449 if ( face->afm_data )
450 T1_Done_AFM( memory, (T1_AFM*)face->afm_data );
451 #endif
452
453 /* release unicode map, if any */
454 FT_FREE( face->unicode_map.maps );
455 face->unicode_map.num_maps = 0;
456
457 face->root.family_name = 0;
458 face->root.style_name = 0;
459 }
460
461
462 /*************************************************************************/
463 /* */
464 /* <Function> */
465 /* T42_Driver_Init */
466 /* */
467 /* <Description> */
468 /* Initializes a given Type 42 driver object. */
469 /* */
470 /* <Input> */
471 /* driver :: A handle to the target driver object. */
472 /* */
473 /* <Return> */
474 /* FreeType error code. 0 means success. */
475 /* */
476 FT_LOCAL_DEF( FT_Error )
477 T42_Driver_Init( FT_Module module ) /* T42_Driver */
478 {
479 T42_Driver driver = (T42_Driver)module;
480 FT_Module ttmodule;
481
482
483 ttmodule = FT_Get_Module( module->library, "truetype" );
484 if ( !ttmodule )
485 {
486 FT_ERROR(( "T42_Driver_Init: cannot access `truetype' module\n" ));
487 return FT_THROW( Missing_Module );
488 }
489
490 driver->ttclazz = (FT_Driver_Class)ttmodule->clazz;
491
492 return FT_Err_Ok;
493 }
494
495
496 FT_LOCAL_DEF( void )
497 T42_Driver_Done( FT_Module module )
498 {
499 FT_UNUSED( module );
500 }
501
502
503 FT_LOCAL_DEF( FT_Error )
504 T42_Size_Init( FT_Size size ) /* T42_Size */
505 {
506 T42_Size t42size = (T42_Size)size;
507 FT_Face face = size->face;
508 T42_Face t42face = (T42_Face)face;
509 FT_Size ttsize;
510 FT_Error error = FT_Err_Ok;
511
512
513 error = FT_New_Size( t42face->ttf_face, &ttsize );
514 t42size->ttsize = ttsize;
515
516 FT_Activate_Size( ttsize );
517
518 return error;
519 }
520
521
522 FT_LOCAL_DEF( FT_Error )
523 T42_Size_Request( FT_Size t42size, /* T42_Size */
524 FT_Size_Request req )
525 {
526 T42_Size size = (T42_Size)t42size;
527 T42_Face face = (T42_Face)t42size->face;
528 FT_Error error;
529
530
531 FT_Activate_Size( size->ttsize );
532
533 error = FT_Request_Size( face->ttf_face, req );
534 if ( !error )
535 t42size->metrics = face->ttf_face->size->metrics;
536
537 return error;
538 }
539
540
541 FT_LOCAL_DEF( FT_Error )
542 T42_Size_Select( FT_Size t42size, /* T42_Size */
543 FT_ULong strike_index )
544 {
545 T42_Size size = (T42_Size)t42size;
546 T42_Face face = (T42_Face)t42size->face;
547 FT_Error error;
548
549
550 FT_Activate_Size( size->ttsize );
551
552 error = FT_Select_Size( face->ttf_face, (FT_Int)strike_index );
553 if ( !error )
554 t42size->metrics = face->ttf_face->size->metrics;
555
556 return error;
557
558 }
559
560
561 FT_LOCAL_DEF( void )
562 T42_Size_Done( FT_Size t42size ) /* T42_Size */
563 {
564 T42_Size size = (T42_Size)t42size;
565 FT_Face face = t42size->face;
566 T42_Face t42face = (T42_Face)face;
567 FT_ListNode node;
568
569
570 node = FT_List_Find( &t42face->ttf_face->sizes_list, size->ttsize );
571 if ( node )
572 {
573 FT_Done_Size( size->ttsize );
574 size->ttsize = NULL;
575 }
576 }
577
578
579 FT_LOCAL_DEF( FT_Error )
580 T42_GlyphSlot_Init( FT_GlyphSlot t42slot ) /* T42_GlyphSlot */
581 {
582 T42_GlyphSlot slot = (T42_GlyphSlot)t42slot;
583 FT_Face face = t42slot->face;
584 T42_Face t42face = (T42_Face)face;
585 FT_GlyphSlot ttslot;
586 FT_Error error = FT_Err_Ok;
587
588
589 if ( face->glyph == NULL )
590 {
591 /* First glyph slot for this face */
592 slot->ttslot = t42face->ttf_face->glyph;
593 }
594 else
595 {
596 error = FT_New_GlyphSlot( t42face->ttf_face, &ttslot );
597 slot->ttslot = ttslot;
598 }
599
600 return error;
601 }
602
603
604 FT_LOCAL_DEF( void )
605 T42_GlyphSlot_Done( FT_GlyphSlot t42slot ) /* T42_GlyphSlot */
606 {
607 T42_GlyphSlot slot = (T42_GlyphSlot)t42slot;
608
609
610 FT_Done_GlyphSlot( slot->ttslot );
611 }
612
613
614 static void
615 t42_glyphslot_clear( FT_GlyphSlot slot )
616 {
617 /* free bitmap if needed */
618 ft_glyphslot_free_bitmap( slot );
619
620 /* clear all public fields in the glyph slot */
621 FT_ZERO( &slot->metrics );
622 FT_ZERO( &slot->outline );
623 FT_ZERO( &slot->bitmap );
624
625 slot->bitmap_left = 0;
626 slot->bitmap_top = 0;
627 slot->num_subglyphs = 0;
628 slot->subglyphs = 0;
629 slot->control_data = 0;
630 slot->control_len = 0;
631 slot->other = 0;
632 slot->format = FT_GLYPH_FORMAT_NONE;
633
634 slot->linearHoriAdvance = 0;
635 slot->linearVertAdvance = 0;
636 }
637
638
639 FT_LOCAL_DEF( FT_Error )
640 T42_GlyphSlot_Load( FT_GlyphSlot glyph,
641 FT_Size size,
642 FT_UInt glyph_index,
643 FT_Int32 load_flags )
644 {
645 FT_Error error;
646 T42_GlyphSlot t42slot = (T42_GlyphSlot)glyph;
647 T42_Size t42size = (T42_Size)size;
648 FT_Driver_Class ttclazz = ((T42_Driver)glyph->face->driver)->ttclazz;
649
650
651 t42_glyphslot_clear( t42slot->ttslot );
652 error = ttclazz->load_glyph( t42slot->ttslot,
653 t42size->ttsize,
654 glyph_index,
655 load_flags | FT_LOAD_NO_BITMAP );
656
657 if ( !error )
658 {
659 glyph->metrics = t42slot->ttslot->metrics;
660
661 glyph->linearHoriAdvance = t42slot->ttslot->linearHoriAdvance;
662 glyph->linearVertAdvance = t42slot->ttslot->linearVertAdvance;
663
664 glyph->format = t42slot->ttslot->format;
665 glyph->outline = t42slot->ttslot->outline;
666
667 glyph->bitmap = t42slot->ttslot->bitmap;
668 glyph->bitmap_left = t42slot->ttslot->bitmap_left;
669 glyph->bitmap_top = t42slot->ttslot->bitmap_top;
670
671 glyph->num_subglyphs = t42slot->ttslot->num_subglyphs;
672 glyph->subglyphs = t42slot->ttslot->subglyphs;
673
674 glyph->control_data = t42slot->ttslot->control_data;
675 glyph->control_len = t42slot->ttslot->control_len;
676 }
677
678 return error;
679 }
680
681
682 /* END */
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