1 /****************************************************************************
2 *
3 * t1objs.c
4 *
5 * Type 1 objects manager (body).
6 *
7 * Copyright (C) 1996-2023 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 <freetype/internal/ftcalc.h>
20 #include <freetype/internal/ftdebug.h>
21 #include <freetype/internal/ftstream.h>
22 #include <freetype/ttnameid.h>
23 #include <freetype/ftdriver.h>
24
25 #include "t1gload.h"
26 #include "t1load.h"
27
28 #include "t1errors.h"
29
30 #ifndef T1_CONFIG_OPTION_NO_AFM
31 #include "t1afm.h"
32 #endif
33
34 #include <freetype/internal/services/svpscmap.h>
35 #include <freetype/internal/psaux.h>
36
37
38 /**************************************************************************
39 *
40 * The macro FT_COMPONENT is used in trace mode. It is an implicit
41 * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log
42 * messages during execution.
43 */
44 #undef FT_COMPONENT
45 #define FT_COMPONENT t1objs
46
47
48 /**************************************************************************
49 *
50 * SIZE FUNCTIONS
51 *
52 */
53
54
55 static PSH_Globals_Funcs
56 T1_Size_Get_Globals_Funcs( T1_Size size )
57 {
58 T1_Face face = (T1_Face)size->root.face;
59 PSHinter_Service pshinter = (PSHinter_Service)face->pshinter;
60 FT_Module module;
61
62
63 module = FT_Get_Module( size->root.face->driver->root.library,
64 "pshinter" );
65 return ( module && pshinter && pshinter->get_globals_funcs )
66 ? pshinter->get_globals_funcs( module )
67 : 0;
68 }
69
70
71 FT_LOCAL_DEF( void )
72 T1_Size_Done( FT_Size t1size ) /* T1_Size */
73 {
74 T1_Size size = (T1_Size)t1size;
75
76
77 if ( t1size->internal->module_data )
78 {
79 PSH_Globals_Funcs funcs;
80
81
82 funcs = T1_Size_Get_Globals_Funcs( size );
83 if ( funcs )
84 funcs->destroy( (PSH_Globals)t1size->internal->module_data );
85
86 t1size->internal->module_data = NULL;
87 }
88 }
89
90
91 FT_LOCAL_DEF( FT_Error )
92 T1_Size_Init( FT_Size t1size ) /* T1_Size */
93 {
94 T1_Size size = (T1_Size)t1size;
95 FT_Error error = FT_Err_Ok;
96 PSH_Globals_Funcs funcs = T1_Size_Get_Globals_Funcs( size );
97
98
99 if ( funcs )
100 {
101 PSH_Globals globals;
102 T1_Face face = (T1_Face)size->root.face;
103
104
105 error = funcs->create( size->root.face->memory,
106 &face->type1.private_dict, &globals );
107 if ( !error )
108 t1size->internal->module_data = globals;
109 }
110
111 return error;
112 }
113
114
115 FT_LOCAL_DEF( FT_Error )
116 T1_Size_Request( FT_Size t1size, /* T1_Size */
117 FT_Size_Request req )
118 {
119 FT_Error error;
120
121 T1_Size size = (T1_Size)t1size;
122 PSH_Globals_Funcs funcs = T1_Size_Get_Globals_Funcs( size );
123
124
125 error = FT_Request_Metrics( size->root.face, req );
126 if ( error )
127 goto Exit;
128
129 if ( funcs )
130 funcs->set_scale( (PSH_Globals)t1size->internal->module_data,
131 size->root.metrics.x_scale,
132 size->root.metrics.y_scale,
133 0, 0 );
134
135 Exit:
136 return error;
137 }
138
139
140 /**************************************************************************
141 *
142 * SLOT FUNCTIONS
143 *
144 */
145
146 FT_LOCAL_DEF( void )
147 T1_GlyphSlot_Done( FT_GlyphSlot slot )
148 {
149 /* `slot->internal` might be NULL in out-of-memory situations. */
150 if ( slot->internal )
151 slot->internal->glyph_hints = NULL;
152 }
153
154
155 FT_LOCAL_DEF( FT_Error )
156 T1_GlyphSlot_Init( FT_GlyphSlot slot )
157 {
158 T1_Face face;
159 PSHinter_Service pshinter;
160
161
162 face = (T1_Face)slot->face;
163 pshinter = (PSHinter_Service)face->pshinter;
164
165 if ( pshinter )
166 {
167 FT_Module module;
168
169
170 module = FT_Get_Module( slot->library, "pshinter" );
171 if ( module )
172 {
173 T1_Hints_Funcs funcs;
174
175
176 funcs = pshinter->get_t1_funcs( module );
177 slot->internal->glyph_hints = (void*)funcs;
178 }
179 }
180
181 return 0;
182 }
183
184
185 /**************************************************************************
186 *
187 * FACE FUNCTIONS
188 *
189 */
190
191
192 /**************************************************************************
193 *
194 * @Function:
195 * T1_Face_Done
196 *
197 * @Description:
198 * The face object destructor.
199 *
200 * @Input:
201 * face ::
202 * A typeless pointer to the face object to destroy.
203 */
204 FT_LOCAL_DEF( void )
205 T1_Face_Done( FT_Face t1face ) /* T1_Face */
206 {
207 T1_Face face = (T1_Face)t1face;
208 FT_Memory memory;
209 T1_Font type1;
210
211
212 if ( !face )
213 return;
214
215 memory = face->root.memory;
216 type1 = &face->type1;
217
218 #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
219 /* release multiple masters information */
220 FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) );
221
222 if ( face->buildchar )
223 {
224 FT_FREE( face->buildchar );
225
226 face->len_buildchar = 0;
227 }
228
229 T1_Done_Blend( t1face );
230 face->blend = NULL;
231 #endif
232
233 /* release font info strings */
234 {
235 PS_FontInfo info = &type1->font_info;
236
237
238 FT_FREE( info->version );
239 FT_FREE( info->notice );
240 FT_FREE( info->full_name );
241 FT_FREE( info->family_name );
242 FT_FREE( info->weight );
243 }
244
245 /* release top dictionary */
246 FT_FREE( type1->charstrings_len );
247 FT_FREE( type1->charstrings );
248 FT_FREE( type1->glyph_names );
249
250 FT_FREE( type1->subrs );
251 FT_FREE( type1->subrs_len );
252
253 ft_hash_num_free( type1->subrs_hash, memory );
254 FT_FREE( type1->subrs_hash );
255
256 FT_FREE( type1->subrs_block );
257 FT_FREE( type1->charstrings_block );
258 FT_FREE( type1->glyph_names_block );
259
260 FT_FREE( type1->encoding.char_index );
261 FT_FREE( type1->encoding.char_name );
262 FT_FREE( type1->font_name );
263
264 #ifndef T1_CONFIG_OPTION_NO_AFM
265 /* release afm data if present */
266 if ( face->afm_data )
267 T1_Done_Metrics( memory, (AFM_FontInfo)face->afm_data );
268 #endif
269
270 /* release unicode map, if any */
271 #if 0
272 FT_FREE( face->unicode_map_rec.maps );
273 face->unicode_map_rec.num_maps = 0;
274 face->unicode_map = NULL;
275 #endif
276
277 face->root.family_name = NULL;
278 face->root.style_name = NULL;
279 }
280
281
282 /**************************************************************************
283 *
284 * @Function:
285 * T1_Face_Init
286 *
287 * @Description:
288 * The face object constructor.
289 *
290 * @Input:
291 * stream ::
292 * Dummy argument for compatibility with the `FT_Face_InitFunc` API.
293 * Ignored. The stream should be passed through `face->root.stream`.
294 *
295 * face_index ::
296 * The index of the font face in the resource.
297 *
298 * num_params ::
299 * Number of additional generic parameters. Ignored.
300 *
301 * params ::
302 * Additional generic parameters. Ignored.
303 *
304 * @InOut:
305 * face ::
306 * The face record to build.
307 *
308 * @Return:
309 * FreeType error code. 0 means success.
310 */
311 FT_LOCAL_DEF( FT_Error )
312 T1_Face_Init( FT_Stream stream,
313 FT_Face t1face, /* T1_Face */
314 FT_Int face_index,
315 FT_Int num_params,
316 FT_Parameter* params )
317 {
318 T1_Face face = (T1_Face)t1face;
319 FT_Error error;
320 FT_Service_PsCMaps psnames;
321 PSAux_Service psaux;
322 T1_Font type1 = &face->type1;
323 PS_FontInfo info = &type1->font_info;
324
325 FT_UNUSED( num_params );
326 FT_UNUSED( params );
327 FT_UNUSED( stream );
328
329
330 face->root.num_faces = 1;
331
332 FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
333 face->psnames = psnames;
334
335 face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
336 "psaux" );
337 psaux = (PSAux_Service)face->psaux;
338 if ( !psaux )
339 {
340 FT_ERROR(( "T1_Face_Init: cannot access `psaux' module\n" ));
341 error = FT_THROW( Missing_Module );
342 goto Exit;
343 }
344
345 face->pshinter = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
346 "pshinter" );
347
348 FT_TRACE2(( "Type 1 driver\n" ));
349
350 /* open the tokenizer; this will also check the font format */
351 error = T1_Open_Face( face );
352 if ( error )
353 goto Exit;
354
355 FT_TRACE2(( "T1_Face_Init: %p (index %d)\n",
356 (void *)face,
357 face_index ));
358
359 /* if we just wanted to check the format, leave successfully now */
360 if ( face_index < 0 )
361 goto Exit;
362
363 /* check the face index */
364 if ( ( face_index & 0xFFFF ) > 0 )
365 {
366 FT_ERROR(( "T1_Face_Init: invalid face index\n" ));
367 error = FT_THROW( Invalid_Argument );
368 goto Exit;
369 }
370
371 /* now load the font program into the face object */
372
373 /* initialize the face object fields */
374
375 /* set up root face fields */
376 {
377 FT_Face root = (FT_Face)&face->root;
378
379
380 root->num_glyphs = type1->num_glyphs;
381 root->face_index = 0;
382
383 root->face_flags |= FT_FACE_FLAG_SCALABLE |
384 FT_FACE_FLAG_HORIZONTAL |
385 FT_FACE_FLAG_GLYPH_NAMES |
386 FT_FACE_FLAG_HINTER;
387
388 if ( info->is_fixed_pitch )
389 root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
390
391 if ( face->blend )
392 root->face_flags |= FT_FACE_FLAG_MULTIPLE_MASTERS;
393
394 /* The following code to extract the family and the style is very */
395 /* simplistic and might get some things wrong. For a full-featured */
396 /* algorithm you might have a look at the whitepaper given at */
397 /* */
398 /* https://blogs.msdn.com/text/archive/2007/04/23/wpf-font-selection-model.aspx */
399
400 /* get style name -- be careful, some broken fonts only */
401 /* have a `/FontName' dictionary entry! */
402 root->family_name = info->family_name;
403 root->style_name = NULL;
404
405 if ( root->family_name )
406 {
407 char* full = info->full_name;
408 char* family = root->family_name;
409
410
411 if ( full )
412 {
413 FT_Bool the_same = TRUE;
414
415
416 while ( *full )
417 {
418 if ( *full == *family )
419 {
420 family++;
421 full++;
422 }
423 else
424 {
425 if ( *full == ' ' || *full == '-' )
426 full++;
427 else if ( *family == ' ' || *family == '-' )
428 family++;
429 else
430 {
431 the_same = FALSE;
432
433 if ( !*family )
434 root->style_name = full;
435 break;
436 }
437 }
438 }
439
440 if ( the_same )
441 root->style_name = (char *)"Regular";
442 }
443 }
444 else
445 {
446 /* do we have a `/FontName'? */
447 if ( type1->font_name )
448 root->family_name = type1->font_name;
449 }
450
451 if ( !root->style_name )
452 {
453 if ( info->weight )
454 root->style_name = info->weight;
455 else
456 /* assume `Regular' style because we don't know better */
457 root->style_name = (char *)"Regular";
458 }
459
460 /* compute style flags */
461 root->style_flags = 0;
462 if ( info->italic_angle )
463 root->style_flags |= FT_STYLE_FLAG_ITALIC;
464 if ( info->weight )
465 {
466 if ( !ft_strcmp( info->weight, "Bold" ) ||
467 !ft_strcmp( info->weight, "Black" ) )
468 root->style_flags |= FT_STYLE_FLAG_BOLD;
469 }
470
471 /* no embedded bitmap support */
472 root->num_fixed_sizes = 0;
473 root->available_sizes = NULL;
474
475 root->bbox.xMin = type1->font_bbox.xMin >> 16;
476 root->bbox.yMin = type1->font_bbox.yMin >> 16;
477 /* no `U' suffix here to 0xFFFF! */
478 root->bbox.xMax = ( type1->font_bbox.xMax + 0xFFFF ) >> 16;
479 root->bbox.yMax = ( type1->font_bbox.yMax + 0xFFFF ) >> 16;
480
481 /* Set units_per_EM if we didn't set it in t1_parse_font_matrix. */
482 if ( !root->units_per_EM )
483 root->units_per_EM = 1000;
484
485 root->ascender = (FT_Short)( root->bbox.yMax );
486 root->descender = (FT_Short)( root->bbox.yMin );
487
488 root->height = (FT_Short)( ( root->units_per_EM * 12 ) / 10 );
489 if ( root->height < root->ascender - root->descender )
490 root->height = (FT_Short)( root->ascender - root->descender );
491
492 /* now compute the maximum advance width */
493 root->max_advance_width =
494 (FT_Short)( root->bbox.xMax );
495 {
496 FT_Pos max_advance;
497
498
499 error = T1_Compute_Max_Advance( face, &max_advance );
500
501 /* in case of error, keep the standard width */
502 if ( !error )
503 root->max_advance_width = (FT_Short)FIXED_TO_INT( max_advance );
504 else
505 error = FT_Err_Ok; /* clear error */
506 }
507
508 root->max_advance_height = root->height;
509
510 root->underline_position = (FT_Short)info->underline_position;
511 root->underline_thickness = (FT_Short)info->underline_thickness;
512 }
513
514 {
515 FT_Face root = &face->root;
516
517
518 if ( psnames )
519 {
520 FT_CharMapRec charmap;
521 T1_CMap_Classes cmap_classes = psaux->t1_cmap_classes;
522 FT_CMap_Class clazz;
523
524
525 charmap.face = root;
526
527 /* first of all, try to synthesize a Unicode charmap */
528 charmap.platform_id = TT_PLATFORM_MICROSOFT;
529 charmap.encoding_id = TT_MS_ID_UNICODE_CS;
530 charmap.encoding = FT_ENCODING_UNICODE;
531
532 error = FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL );
533 if ( error &&
534 FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) &&
535 FT_ERR_NEQ( error, Unimplemented_Feature ) )
536 goto Exit;
537 error = FT_Err_Ok;
538
539 /* now, generate an Adobe Standard encoding when appropriate */
540 charmap.platform_id = TT_PLATFORM_ADOBE;
541 clazz = NULL;
542
543 switch ( type1->encoding_type )
544 {
545 case T1_ENCODING_TYPE_STANDARD:
546 charmap.encoding = FT_ENCODING_ADOBE_STANDARD;
547 charmap.encoding_id = TT_ADOBE_ID_STANDARD;
548 clazz = cmap_classes->standard;
549 break;
550
551 case T1_ENCODING_TYPE_EXPERT:
552 charmap.encoding = FT_ENCODING_ADOBE_EXPERT;
553 charmap.encoding_id = TT_ADOBE_ID_EXPERT;
554 clazz = cmap_classes->expert;
555 break;
556
557 case T1_ENCODING_TYPE_ARRAY:
558 charmap.encoding = FT_ENCODING_ADOBE_CUSTOM;
559 charmap.encoding_id = TT_ADOBE_ID_CUSTOM;
560 clazz = cmap_classes->custom;
561 break;
562
563 case T1_ENCODING_TYPE_ISOLATIN1:
564 charmap.encoding = FT_ENCODING_ADOBE_LATIN_1;
565 charmap.encoding_id = TT_ADOBE_ID_LATIN_1;
566 clazz = cmap_classes->unicode;
567 break;
568
569 default:
570 ;
571 }
572
573 if ( clazz )
574 error = FT_CMap_New( clazz, NULL, &charmap, NULL );
575 }
576 }
577
578 Exit:
579 return error;
580 }
581
582
583 /**************************************************************************
584 *
585 * @Function:
586 * T1_Driver_Init
587 *
588 * @Description:
589 * Initializes a given Type 1 driver object.
590 *
591 * @Input:
592 * driver ::
593 * A handle to the target driver object.
594 *
595 * @Return:
596 * FreeType error code. 0 means success.
597 */
598 FT_LOCAL_DEF( FT_Error )
599 T1_Driver_Init( FT_Module module )
600 {
601 PS_Driver driver = (PS_Driver)module;
602
603 FT_UInt32 seed;
604
605
606 /* set default property values, cf. `ftt1drv.h' */
607 driver->hinting_engine = FT_HINTING_ADOBE;
608
609 driver->no_stem_darkening = TRUE;
610
611 driver->darken_params[0] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1;
612 driver->darken_params[1] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1;
613 driver->darken_params[2] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2;
614 driver->darken_params[3] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2;
615 driver->darken_params[4] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3;
616 driver->darken_params[5] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3;
617 driver->darken_params[6] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4;
618 driver->darken_params[7] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4;
619
620 /* compute random seed from some memory addresses */
621 seed = (FT_UInt32)( (FT_Offset)(char*)&seed ^
622 (FT_Offset)(char*)&module ^
623 (FT_Offset)(char*)module->memory );
624 seed = seed ^ ( seed >> 10 ) ^ ( seed >> 20 );
625
626 driver->random_seed = (FT_Int32)seed;
627 if ( driver->random_seed < 0 )
628 driver->random_seed = -driver->random_seed;
629 else if ( driver->random_seed == 0 )
630 driver->random_seed = 123456789;
631
632 return FT_Err_Ok;
633 }
634
635
636 /**************************************************************************
637 *
638 * @Function:
639 * T1_Driver_Done
640 *
641 * @Description:
642 * Finalizes a given Type 1 driver.
643 *
644 * @Input:
645 * driver ::
646 * A handle to the target Type 1 driver.
647 */
648 FT_LOCAL_DEF( void )
649 T1_Driver_Done( FT_Module driver )
650 {
651 FT_UNUSED( driver );
652 }
653
654
655 /* END */