1 /***************************************************************************/
2 /* */
3 /* t1objs.c */
4 /* */
5 /* Type 1 objects manager (body). */
6 /* */
7 /* Copyright 1996-2018 by */
8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
9 /* */
10 /* This file is part of the FreeType project, and may only be used, */
11 /* modified, and distributed under the terms of the FreeType project */
12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
13 /* this file you indicate that you have read the license and */
14 /* understand and accept it fully. */
15 /* */
16 /***************************************************************************/
17
18
19 #include <ft2build.h>
20 #include FT_INTERNAL_CALC_H
21 #include FT_INTERNAL_DEBUG_H
22 #include FT_INTERNAL_STREAM_H
23 #include FT_TRUETYPE_IDS_H
24 #include FT_DRIVER_H
25
26 #include "t1gload.h"
27 #include "t1load.h"
28
29 #include "t1errors.h"
30
31 #ifndef T1_CONFIG_OPTION_NO_AFM
32 #include "t1afm.h"
33 #endif
34
35 #include FT_SERVICE_POSTSCRIPT_CMAPS_H
36 #include FT_INTERNAL_POSTSCRIPT_AUX_H
37
38
39 /*************************************************************************/
40 /* */
41 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
42 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
43 /* messages during execution. */
44 /* */
45 #undef FT_COMPONENT
46 #define FT_COMPONENT trace_t1objs
47
48
49 /*************************************************************************/
50 /* */
51 /* SIZE FUNCTIONS */
52 /* */
53 /*************************************************************************/
54
55
56 static PSH_Globals_Funcs
57 T1_Size_Get_Globals_Funcs( T1_Size size )
58 {
59 T1_Face face = (T1_Face)size->root.face;
60 PSHinter_Service pshinter = (PSHinter_Service)face->pshinter;
61 FT_Module module;
62
63
64 module = FT_Get_Module( size->root.face->driver->root.library,
65 "pshinter" );
66 return ( module && pshinter && pshinter->get_globals_funcs )
67 ? pshinter->get_globals_funcs( module )
68 : 0;
69 }
70
71
72 FT_LOCAL_DEF( void )
73 T1_Size_Done( FT_Size t1size ) /* T1_Size */
74 {
75 T1_Size size = (T1_Size)t1size;
76
77
78 if ( t1size->internal->module_data )
79 {
80 PSH_Globals_Funcs funcs;
81
82
83 funcs = T1_Size_Get_Globals_Funcs( size );
84 if ( funcs )
85 funcs->destroy( (PSH_Globals)t1size->internal->module_data );
86
87 t1size->internal->module_data = NULL;
88 }
89 }
90
91
92 FT_LOCAL_DEF( FT_Error )
93 T1_Size_Init( FT_Size t1size ) /* T1_Size */
94 {
95 T1_Size size = (T1_Size)t1size;
96 FT_Error error = FT_Err_Ok;
97 PSH_Globals_Funcs funcs = T1_Size_Get_Globals_Funcs( size );
98
99
100 if ( funcs )
101 {
102 PSH_Globals globals;
103 T1_Face face = (T1_Face)size->root.face;
104
105
106 error = funcs->create( size->root.face->memory,
107 &face->type1.private_dict, &globals );
108 if ( !error )
109 t1size->internal->module_data = globals;
110 }
111
112 return error;
113 }
114
115
116 FT_LOCAL_DEF( FT_Error )
117 T1_Size_Request( FT_Size t1size, /* T1_Size */
118 FT_Size_Request req )
119 {
120 T1_Size size = (T1_Size)t1size;
121 PSH_Globals_Funcs funcs = T1_Size_Get_Globals_Funcs( size );
122
123
124 FT_Request_Metrics( size->root.face, req );
125
126 if ( funcs )
127 funcs->set_scale( (PSH_Globals)t1size->internal->module_data,
128 size->root.metrics.x_scale,
129 size->root.metrics.y_scale,
130 0, 0 );
131
132 return FT_Err_Ok;
133 }
134
135
136 /*************************************************************************/
137 /* */
138 /* SLOT FUNCTIONS */
139 /* */
140 /*************************************************************************/
141
142 FT_LOCAL_DEF( void )
143 T1_GlyphSlot_Done( FT_GlyphSlot slot )
144 {
145 slot->internal->glyph_hints = NULL;
146 }
147
148
149 FT_LOCAL_DEF( FT_Error )
150 T1_GlyphSlot_Init( FT_GlyphSlot slot )
151 {
152 T1_Face face;
153 PSHinter_Service pshinter;
154
155
156 face = (T1_Face)slot->face;
157 pshinter = (PSHinter_Service)face->pshinter;
158
159 if ( pshinter )
160 {
161 FT_Module module;
162
163
164 module = FT_Get_Module( slot->face->driver->root.library,
165 "pshinter" );
166 if ( module )
167 {
168 T1_Hints_Funcs funcs;
169
170
171 funcs = pshinter->get_t1_funcs( module );
172 slot->internal->glyph_hints = (void*)funcs;
173 }
174 }
175
176 return 0;
177 }
178
179
180 /*************************************************************************/
181 /* */
182 /* FACE FUNCTIONS */
183 /* */
184 /*************************************************************************/
185
186
187 /*************************************************************************/
188 /* */
189 /* <Function> */
190 /* T1_Face_Done */
191 /* */
192 /* <Description> */
193 /* The face object destructor. */
194 /* */
195 /* <Input> */
196 /* face :: A typeless pointer to the face object to destroy. */
197 /* */
198 FT_LOCAL_DEF( void )
199 T1_Face_Done( FT_Face t1face ) /* T1_Face */
200 {
201 T1_Face face = (T1_Face)t1face;
202 FT_Memory memory;
203 T1_Font type1;
204
205
206 if ( !face )
207 return;
208
209 memory = face->root.memory;
210 type1 = &face->type1;
211
212 #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
213 /* release multiple masters information */
214 FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) );
215
216 if ( face->buildchar )
217 {
218 FT_FREE( face->buildchar );
219
220 face->buildchar = NULL;
221 face->len_buildchar = 0;
222 }
223
224 T1_Done_Blend( face );
225 face->blend = NULL;
226 #endif
227
228 /* release font info strings */
229 {
230 PS_FontInfo info = &type1->font_info;
231
232
233 FT_FREE( info->version );
234 FT_FREE( info->notice );
235 FT_FREE( info->full_name );
236 FT_FREE( info->family_name );
237 FT_FREE( info->weight );
238 }
239
240 /* release top dictionary */
241 FT_FREE( type1->charstrings_len );
242 FT_FREE( type1->charstrings );
243 FT_FREE( type1->glyph_names );
244
245 FT_FREE( type1->subrs );
246 FT_FREE( type1->subrs_len );
247
248 ft_hash_num_free( type1->subrs_hash, memory );
249 FT_FREE( type1->subrs_hash );
250
251 FT_FREE( type1->subrs_block );
252 FT_FREE( type1->charstrings_block );
253 FT_FREE( type1->glyph_names_block );
254
255 FT_FREE( type1->encoding.char_index );
256 FT_FREE( type1->encoding.char_name );
257 FT_FREE( type1->font_name );
258
259 #ifndef T1_CONFIG_OPTION_NO_AFM
260 /* release afm data if present */
261 if ( face->afm_data )
262 T1_Done_Metrics( memory, (AFM_FontInfo)face->afm_data );
263 #endif
264
265 /* release unicode map, if any */
266 #if 0
267 FT_FREE( face->unicode_map_rec.maps );
268 face->unicode_map_rec.num_maps = 0;
269 face->unicode_map = NULL;
270 #endif
271
272 face->root.family_name = NULL;
273 face->root.style_name = NULL;
274 }
275
276
277 /*************************************************************************/
278 /* */
279 /* <Function> */
280 /* T1_Face_Init */
281 /* */
282 /* <Description> */
283 /* The face object constructor. */
284 /* */
285 /* <Input> */
286 /* stream :: input stream where to load font data. */
287 /* */
288 /* face_index :: The index of the font face in the resource. */
289 /* */
290 /* num_params :: Number of additional generic parameters. Ignored. */
291 /* */
292 /* params :: Additional generic parameters. Ignored. */
293 /* */
294 /* <InOut> */
295 /* face :: The face record to build. */
296 /* */
297 /* <Return> */
298 /* FreeType error code. 0 means success. */
299 /* */
300 FT_LOCAL_DEF( FT_Error )
301 T1_Face_Init( FT_Stream stream,
302 FT_Face t1face, /* T1_Face */
303 FT_Int face_index,
304 FT_Int num_params,
305 FT_Parameter* params )
306 {
307 T1_Face face = (T1_Face)t1face;
308 FT_Error error;
309 FT_Service_PsCMaps psnames;
310 PSAux_Service psaux;
311 T1_Font type1 = &face->type1;
312 PS_FontInfo info = &type1->font_info;
313
314 FT_UNUSED( num_params );
315 FT_UNUSED( params );
316 FT_UNUSED( stream );
317
318
319 face->root.num_faces = 1;
320
321 FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
322 face->psnames = psnames;
323
324 face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
325 "psaux" );
326 psaux = (PSAux_Service)face->psaux;
327 if ( !psaux )
328 {
329 FT_ERROR(( "T1_Face_Init: cannot access `psaux' module\n" ));
330 error = FT_THROW( Missing_Module );
331 goto Exit;
332 }
333
334 face->pshinter = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
335 "pshinter" );
336
337 FT_TRACE2(( "Type 1 driver\n" ));
338
339 /* open the tokenizer; this will also check the font format */
340 error = T1_Open_Face( face );
341 if ( error )
342 goto Exit;
343
344 /* if we just wanted to check the format, leave successfully now */
345 if ( face_index < 0 )
346 goto Exit;
347
348 /* check the face index */
349 if ( ( face_index & 0xFFFF ) > 0 )
350 {
351 FT_ERROR(( "T1_Face_Init: invalid face index\n" ));
352 error = FT_THROW( Invalid_Argument );
353 goto Exit;
354 }
355
356 /* now load the font program into the face object */
357
358 /* initialize the face object fields */
359
360 /* set up root face fields */
361 {
362 FT_Face root = (FT_Face)&face->root;
363
364
365 root->num_glyphs = type1->num_glyphs;
366 root->face_index = 0;
367
368 root->face_flags |= FT_FACE_FLAG_SCALABLE |
369 FT_FACE_FLAG_HORIZONTAL |
370 FT_FACE_FLAG_GLYPH_NAMES |
371 FT_FACE_FLAG_HINTER;
372
373 if ( info->is_fixed_pitch )
374 root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
375
376 if ( face->blend )
377 root->face_flags |= FT_FACE_FLAG_MULTIPLE_MASTERS;
378
379 /* The following code to extract the family and the style is very */
380 /* simplistic and might get some things wrong. For a full-featured */
381 /* algorithm you might have a look at the whitepaper given at */
382 /* */
383 /* https://blogs.msdn.com/text/archive/2007/04/23/wpf-font-selection-model.aspx */
384
385 /* get style name -- be careful, some broken fonts only */
386 /* have a `/FontName' dictionary entry! */
387 root->family_name = info->family_name;
388 root->style_name = NULL;
389
390 if ( root->family_name )
391 {
392 char* full = info->full_name;
393 char* family = root->family_name;
394
395
396 if ( full )
397 {
398 FT_Bool the_same = TRUE;
399
400
401 while ( *full )
402 {
403 if ( *full == *family )
404 {
405 family++;
406 full++;
407 }
408 else
409 {
410 if ( *full == ' ' || *full == '-' )
411 full++;
412 else if ( *family == ' ' || *family == '-' )
413 family++;
414 else
415 {
416 the_same = FALSE;
417
418 if ( !*family )
419 root->style_name = full;
420 break;
421 }
422 }
423 }
424
425 if ( the_same )
426 root->style_name = (char *)"Regular";
427 }
428 }
429 else
430 {
431 /* do we have a `/FontName'? */
432 if ( type1->font_name )
433 root->family_name = type1->font_name;
434 }
435
436 if ( !root->style_name )
437 {
438 if ( info->weight )
439 root->style_name = info->weight;
440 else
441 /* assume `Regular' style because we don't know better */
442 root->style_name = (char *)"Regular";
443 }
444
445 /* compute style flags */
446 root->style_flags = 0;
447 if ( info->italic_angle )
448 root->style_flags |= FT_STYLE_FLAG_ITALIC;
449 if ( info->weight )
450 {
451 if ( !ft_strcmp( info->weight, "Bold" ) ||
452 !ft_strcmp( info->weight, "Black" ) )
453 root->style_flags |= FT_STYLE_FLAG_BOLD;
454 }
455
456 /* no embedded bitmap support */
457 root->num_fixed_sizes = 0;
458 root->available_sizes = NULL;
459
460 root->bbox.xMin = type1->font_bbox.xMin >> 16;
461 root->bbox.yMin = type1->font_bbox.yMin >> 16;
462 /* no `U' suffix here to 0xFFFF! */
463 root->bbox.xMax = ( type1->font_bbox.xMax + 0xFFFF ) >> 16;
464 root->bbox.yMax = ( type1->font_bbox.yMax + 0xFFFF ) >> 16;
465
466 /* Set units_per_EM if we didn't set it in t1_parse_font_matrix. */
467 if ( !root->units_per_EM )
468 root->units_per_EM = 1000;
469
470 root->ascender = (FT_Short)( root->bbox.yMax );
471 root->descender = (FT_Short)( root->bbox.yMin );
472
473 root->height = (FT_Short)( ( root->units_per_EM * 12 ) / 10 );
474 if ( root->height < root->ascender - root->descender )
475 root->height = (FT_Short)( root->ascender - root->descender );
476
477 /* now compute the maximum advance width */
478 root->max_advance_width =
479 (FT_Short)( root->bbox.xMax );
480 {
481 FT_Pos max_advance;
482
483
484 error = T1_Compute_Max_Advance( face, &max_advance );
485
486 /* in case of error, keep the standard width */
487 if ( !error )
488 root->max_advance_width = (FT_Short)FIXED_TO_INT( max_advance );
489 else
490 error = FT_Err_Ok; /* clear error */
491 }
492
493 root->max_advance_height = root->height;
494
495 root->underline_position = (FT_Short)info->underline_position;
496 root->underline_thickness = (FT_Short)info->underline_thickness;
497 }
498
499 {
500 FT_Face root = &face->root;
501
502
503 if ( psnames )
504 {
505 FT_CharMapRec charmap;
506 T1_CMap_Classes cmap_classes = psaux->t1_cmap_classes;
507 FT_CMap_Class clazz;
508
509
510 charmap.face = root;
511
512 /* first of all, try to synthesize a Unicode charmap */
513 charmap.platform_id = TT_PLATFORM_MICROSOFT;
514 charmap.encoding_id = TT_MS_ID_UNICODE_CS;
515 charmap.encoding = FT_ENCODING_UNICODE;
516
517 error = FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL );
518 if ( error &&
519 FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) )
520 goto Exit;
521 error = FT_Err_Ok;
522
523 /* now, generate an Adobe Standard encoding when appropriate */
524 charmap.platform_id = TT_PLATFORM_ADOBE;
525 clazz = NULL;
526
527 switch ( type1->encoding_type )
528 {
529 case T1_ENCODING_TYPE_STANDARD:
530 charmap.encoding = FT_ENCODING_ADOBE_STANDARD;
531 charmap.encoding_id = TT_ADOBE_ID_STANDARD;
532 clazz = cmap_classes->standard;
533 break;
534
535 case T1_ENCODING_TYPE_EXPERT:
536 charmap.encoding = FT_ENCODING_ADOBE_EXPERT;
537 charmap.encoding_id = TT_ADOBE_ID_EXPERT;
538 clazz = cmap_classes->expert;
539 break;
540
541 case T1_ENCODING_TYPE_ARRAY:
542 charmap.encoding = FT_ENCODING_ADOBE_CUSTOM;
543 charmap.encoding_id = TT_ADOBE_ID_CUSTOM;
544 clazz = cmap_classes->custom;
545 break;
546
547 case T1_ENCODING_TYPE_ISOLATIN1:
548 charmap.encoding = FT_ENCODING_ADOBE_LATIN_1;
549 charmap.encoding_id = TT_ADOBE_ID_LATIN_1;
550 clazz = cmap_classes->unicode;
551 break;
552
553 default:
554 ;
555 }
556
557 if ( clazz )
558 error = FT_CMap_New( clazz, NULL, &charmap, NULL );
559 }
560 }
561
562 Exit:
563 return error;
564 }
565
566
567 /*************************************************************************/
568 /* */
569 /* <Function> */
570 /* T1_Driver_Init */
571 /* */
572 /* <Description> */
573 /* Initializes a given Type 1 driver object. */
574 /* */
575 /* <Input> */
576 /* driver :: A handle to the target driver object. */
577 /* */
578 /* <Return> */
579 /* FreeType error code. 0 means success. */
580 /* */
581 FT_LOCAL_DEF( FT_Error )
582 T1_Driver_Init( FT_Module module )
583 {
584 PS_Driver driver = (PS_Driver)module;
585
586 FT_UInt32 seed;
587
588
589 /* set default property values, cf. `ftt1drv.h' */
590 #ifdef T1_CONFIG_OPTION_OLD_ENGINE
591 driver->hinting_engine = FT_HINTING_FREETYPE;
592 #else
593 driver->hinting_engine = FT_HINTING_ADOBE;
594 #endif
595
596 driver->no_stem_darkening = TRUE;
597
598 driver->darken_params[0] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1;
599 driver->darken_params[1] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1;
600 driver->darken_params[2] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2;
601 driver->darken_params[3] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2;
602 driver->darken_params[4] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3;
603 driver->darken_params[5] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3;
604 driver->darken_params[6] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4;
605 driver->darken_params[7] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4;
606
607 /* compute random seed from some memory addresses */
608 seed = (FT_UInt32)( (FT_Offset)(char*)&seed ^
609 (FT_Offset)(char*)&module ^
610 (FT_Offset)(char*)module->memory );
611 seed = seed ^ ( seed >> 10 ) ^ ( seed >> 20 );
612
613 driver->random_seed = (FT_Int32)seed;
614 if ( driver->random_seed < 0 )
615 driver->random_seed = -driver->random_seed;
616 else if ( driver->random_seed == 0 )
617 driver->random_seed = 123456789;
618
619 return FT_Err_Ok;
620 }
621
622
623 /*************************************************************************/
624 /* */
625 /* <Function> */
626 /* T1_Driver_Done */
627 /* */
628 /* <Description> */
629 /* Finalizes a given Type 1 driver. */
630 /* */
631 /* <Input> */
632 /* driver :: A handle to the target Type 1 driver. */
633 /* */
634 FT_LOCAL_DEF( void )
635 T1_Driver_Done( FT_Module driver )
636 {
637 FT_UNUSED( driver );
638 }
639
640
641 /* END */