1 /****************************************************************************
2 *
3 * t1driver.c
4 *
5 * Type 1 driver interface (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 "t1driver.h"
20 #include "t1gload.h"
21 #include "t1load.h"
22
23 #include "t1errors.h"
24
25 #ifndef T1_CONFIG_OPTION_NO_AFM
26 #include "t1afm.h"
27 #endif
28
29 #include <freetype/internal/ftdebug.h>
30 #include <freetype/internal/ftstream.h>
31 #include <freetype/internal/fthash.h>
32 #include <freetype/internal/ftpsprop.h>
33 #include <freetype/ftdriver.h>
34
35 #include <freetype/internal/services/svmm.h>
36 #include <freetype/internal/services/svgldict.h>
37 #include <freetype/internal/services/svfntfmt.h>
38 #include <freetype/internal/services/svpostnm.h>
39 #include <freetype/internal/services/svpscmap.h>
40 #include <freetype/internal/services/svpsinfo.h>
41 #include <freetype/internal/services/svprop.h>
42 #include <freetype/internal/services/svkern.h>
43
44
45 /**************************************************************************
46 *
47 * The macro FT_COMPONENT is used in trace mode. It is an implicit
48 * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log
49 * messages during execution.
50 */
51 #undef FT_COMPONENT
52 #define FT_COMPONENT t1driver
53
54 /*
55 * GLYPH DICT SERVICE
56 *
57 */
58
59 FT_CALLBACK_DEF( FT_Error )
60 t1_get_glyph_name( FT_Face face, /* T1_Face */
61 FT_UInt glyph_index,
62 FT_Pointer buffer,
63 FT_UInt buffer_max )
64 {
65 T1_Face t1face = (T1_Face)face;
66
67
68 FT_STRCPYN( buffer, t1face->type1.glyph_names[glyph_index], buffer_max );
69
70 return FT_Err_Ok;
71 }
72
73
74 FT_CALLBACK_DEF( FT_UInt )
75 t1_get_name_index( FT_Face face, /* T1_Face */
76 const FT_String* glyph_name )
77 {
78 T1_Face t1face = (T1_Face)face;
79 FT_Int i;
80
81
82 for ( i = 0; i < t1face->type1.num_glyphs; i++ )
83 {
84 FT_String* gname = t1face->type1.glyph_names[i];
85
86
87 if ( !ft_strcmp( glyph_name, gname ) )
88 return (FT_UInt)i;
89 }
90
91 return 0;
92 }
93
94
95 static const FT_Service_GlyphDictRec t1_service_glyph_dict =
96 {
97 t1_get_glyph_name, /* FT_GlyphDict_GetNameFunc get_name */
98 t1_get_name_index /* FT_GlyphDict_NameIndexFunc name_index */
99 };
100
101
102 /*
103 * POSTSCRIPT NAME SERVICE
104 *
105 */
106
107 static const char*
108 t1_get_ps_name( FT_Face face ) /* T1_Face */
109 {
110 T1_Face t1face = (T1_Face)face;
111
112
113 return (const char*) t1face->type1.font_name;
114 }
115
116
117 static const FT_Service_PsFontNameRec t1_service_ps_name =
118 {
119 (FT_PsName_GetFunc)t1_get_ps_name /* get_ps_font_name */
120 };
121
122
123 /*
124 * MULTIPLE MASTERS SERVICE
125 *
126 */
127
128 #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
129 static const FT_Service_MultiMastersRec t1_service_multi_masters =
130 {
131 T1_Get_Multi_Master, /* FT_Get_MM_Func get_mm */
132 T1_Set_MM_Design, /* FT_Set_MM_Design_Func set_mm_design */
133 T1_Set_MM_Blend, /* FT_Set_MM_Blend_Func set_mm_blend */
134 T1_Get_MM_Blend, /* FT_Get_MM_Blend_Func get_mm_blend */
135 T1_Get_MM_Var, /* FT_Get_MM_Var_Func get_mm_var */
136 T1_Set_Var_Design, /* FT_Set_Var_Design_Func set_var_design */
137 T1_Get_Var_Design, /* FT_Get_Var_Design_Func get_var_design */
138 T1_Reset_MM_Blend, /* FT_Set_Named_Instance_Func set_named_instance */
139 NULL, /* FT_Get_Default_Named_Instance_Func get_default_named_instance */
140 T1_Set_MM_WeightVector,
141 /* FT_Set_MM_WeightVector_Func set_mm_weightvector */
142 T1_Get_MM_WeightVector,
143 /* FT_Get_MM_WeightVector_Func get_mm_weightvector */
144
145 NULL, /* FT_Construct_PS_Name_Func construct_ps_name */
146 NULL, /* FT_Var_Load_Delta_Set_Idx_Map_Func load_delta_set_idx_map */
147 NULL, /* FT_Var_Load_Item_Var_Store_Func load_item_variation_store */
148 NULL, /* FT_Var_Get_Item_Delta_Func get_item_delta */
149 NULL, /* FT_Var_Done_Item_Var_Store_Func done_item_variation_store */
150 NULL, /* FT_Var_Done_Delta_Set_Idx_Map_Func done_delta_set_index_map */
151 NULL, /* FT_Get_Var_Blend_Func get_var_blend */
152 T1_Done_Blend /* FT_Done_Blend_Func done_blend */
153 };
154 #endif
155
156
157 /*
158 * POSTSCRIPT INFO SERVICE
159 *
160 */
161
162 static FT_Error
163 t1_ps_get_font_info( FT_Face face,
164 PS_FontInfoRec* afont_info )
165 {
166 *afont_info = ((T1_Face)face)->type1.font_info;
167
168 return FT_Err_Ok;
169 }
170
171
172 static FT_Error
173 t1_ps_get_font_extra( FT_Face face,
174 PS_FontExtraRec* afont_extra )
175 {
176 *afont_extra = ((T1_Face)face)->type1.font_extra;
177
178 return FT_Err_Ok;
179 }
180
181
182 static FT_Int
183 t1_ps_has_glyph_names( FT_Face face )
184 {
185 FT_UNUSED( face );
186
187 return 1;
188 }
189
190
191 static FT_Error
192 t1_ps_get_font_private( FT_Face face,
193 PS_PrivateRec* afont_private )
194 {
195 *afont_private = ((T1_Face)face)->type1.private_dict;
196
197 return FT_Err_Ok;
198 }
199
200
201 static FT_Long
202 t1_ps_get_font_value( FT_Face face,
203 PS_Dict_Keys key,
204 FT_UInt idx,
205 void *value,
206 FT_Long value_len_ )
207 {
208 FT_ULong retval = 0; /* always >= 1 if valid */
209 FT_ULong value_len = value_len_ < 0 ? 0 : (FT_ULong)value_len_;
210
211 T1_Face t1face = (T1_Face)face;
212 T1_Font type1 = &t1face->type1;
213
214
215 switch ( key )
216 {
217 case PS_DICT_FONT_TYPE:
218 retval = sizeof ( type1->font_type );
219 if ( value && value_len >= retval )
220 *((FT_Byte *)value) = type1->font_type;
221 break;
222
223 case PS_DICT_FONT_MATRIX:
224 if ( idx < sizeof ( type1->font_matrix ) /
225 sizeof ( type1->font_matrix.xx ) )
226 {
227 FT_Fixed val = 0;
228
229
230 retval = sizeof ( val );
231 if ( value && value_len >= retval )
232 {
233 switch ( idx )
234 {
235 case 0:
236 val = type1->font_matrix.xx;
237 break;
238 case 1:
239 val = type1->font_matrix.xy;
240 break;
241 case 2:
242 val = type1->font_matrix.yx;
243 break;
244 case 3:
245 val = type1->font_matrix.yy;
246 break;
247 }
248 *((FT_Fixed *)value) = val;
249 }
250 }
251 break;
252
253 case PS_DICT_FONT_BBOX:
254 if ( idx < sizeof ( type1->font_bbox ) /
255 sizeof ( type1->font_bbox.xMin ) )
256 {
257 FT_Fixed val = 0;
258
259
260 retval = sizeof ( val );
261 if ( value && value_len >= retval )
262 {
263 switch ( idx )
264 {
265 case 0:
266 val = type1->font_bbox.xMin;
267 break;
268 case 1:
269 val = type1->font_bbox.yMin;
270 break;
271 case 2:
272 val = type1->font_bbox.xMax;
273 break;
274 case 3:
275 val = type1->font_bbox.yMax;
276 break;
277 }
278 *((FT_Fixed *)value) = val;
279 }
280 }
281 break;
282
283 case PS_DICT_PAINT_TYPE:
284 retval = sizeof ( type1->paint_type );
285 if ( value && value_len >= retval )
286 *((FT_Byte *)value) = type1->paint_type;
287 break;
288
289 case PS_DICT_FONT_NAME:
290 if ( type1->font_name )
291 {
292 retval = ft_strlen( type1->font_name ) + 1;
293 if ( value && value_len >= retval )
294 ft_memcpy( value, (void *)( type1->font_name ), retval );
295 }
296 break;
297
298 case PS_DICT_UNIQUE_ID:
299 retval = sizeof ( type1->private_dict.unique_id );
300 if ( value && value_len >= retval )
301 *((FT_Int *)value) = type1->private_dict.unique_id;
302 break;
303
304 case PS_DICT_NUM_CHAR_STRINGS:
305 retval = sizeof ( type1->num_glyphs );
306 if ( value && value_len >= retval )
307 *((FT_Int *)value) = type1->num_glyphs;
308 break;
309
310 case PS_DICT_CHAR_STRING_KEY:
311 if ( idx < (FT_UInt)type1->num_glyphs )
312 {
313 retval = ft_strlen( type1->glyph_names[idx] ) + 1;
314 if ( value && value_len >= retval )
315 {
316 ft_memcpy( value, (void *)( type1->glyph_names[idx] ), retval );
317 ((FT_Char *)value)[retval - 1] = (FT_Char)'\0';
318 }
319 }
320 break;
321
322 case PS_DICT_CHAR_STRING:
323 if ( idx < (FT_UInt)type1->num_glyphs )
324 {
325 retval = type1->charstrings_len[idx] + 1;
326 if ( value && value_len >= retval )
327 {
328 ft_memcpy( value, (void *)( type1->charstrings[idx] ),
329 retval - 1 );
330 ((FT_Char *)value)[retval - 1] = (FT_Char)'\0';
331 }
332 }
333 break;
334
335 case PS_DICT_ENCODING_TYPE:
336 retval = sizeof ( type1->encoding_type );
337 if ( value && value_len >= retval )
338 *((T1_EncodingType *)value) = type1->encoding_type;
339 break;
340
341 case PS_DICT_ENCODING_ENTRY:
342 if ( type1->encoding_type == T1_ENCODING_TYPE_ARRAY &&
343 idx < (FT_UInt)type1->encoding.num_chars )
344 {
345 retval = ft_strlen( type1->encoding.char_name[idx] ) + 1;
346 if ( value && value_len >= retval )
347 {
348 ft_memcpy( value, (void *)( type1->encoding.char_name[idx] ),
349 retval - 1 );
350 ((FT_Char *)value)[retval - 1] = (FT_Char)'\0';
351 }
352 }
353 break;
354
355 case PS_DICT_NUM_SUBRS:
356 retval = sizeof ( type1->num_subrs );
357 if ( value && value_len >= retval )
358 *((FT_Int *)value) = type1->num_subrs;
359 break;
360
361 case PS_DICT_SUBR:
362 {
363 FT_Bool ok = 0;
364
365
366 if ( type1->subrs_hash )
367 {
368 /* convert subr index to array index */
369 size_t* val = ft_hash_num_lookup( (FT_Int)idx,
370 type1->subrs_hash );
371
372
373 if ( val )
374 {
375 idx = *val;
376 ok = 1;
377 }
378 }
379 else
380 {
381 if ( idx < (FT_UInt)type1->num_subrs )
382 ok = 1;
383 }
384
385 if ( ok && type1->subrs )
386 {
387 retval = type1->subrs_len[idx] + 1;
388 if ( value && value_len >= retval )
389 {
390 ft_memcpy( value, (void *)( type1->subrs[idx] ), retval - 1 );
391 ((FT_Char *)value)[retval - 1] = (FT_Char)'\0';
392 }
393 }
394 }
395 break;
396
397 case PS_DICT_STD_HW:
398 retval = sizeof ( type1->private_dict.standard_width[0] );
399 if ( value && value_len >= retval )
400 *((FT_UShort *)value) = type1->private_dict.standard_width[0];
401 break;
402
403 case PS_DICT_STD_VW:
404 retval = sizeof ( type1->private_dict.standard_height[0] );
405 if ( value && value_len >= retval )
406 *((FT_UShort *)value) = type1->private_dict.standard_height[0];
407 break;
408
409 case PS_DICT_NUM_BLUE_VALUES:
410 retval = sizeof ( type1->private_dict.num_blue_values );
411 if ( value && value_len >= retval )
412 *((FT_Byte *)value) = type1->private_dict.num_blue_values;
413 break;
414
415 case PS_DICT_BLUE_VALUE:
416 if ( idx < type1->private_dict.num_blue_values )
417 {
418 retval = sizeof ( type1->private_dict.blue_values[idx] );
419 if ( value && value_len >= retval )
420 *((FT_Short *)value) = type1->private_dict.blue_values[idx];
421 }
422 break;
423
424 case PS_DICT_BLUE_SCALE:
425 retval = sizeof ( type1->private_dict.blue_scale );
426 if ( value && value_len >= retval )
427 *((FT_Fixed *)value) = type1->private_dict.blue_scale;
428 break;
429
430 case PS_DICT_BLUE_FUZZ:
431 retval = sizeof ( type1->private_dict.blue_fuzz );
432 if ( value && value_len >= retval )
433 *((FT_Int *)value) = type1->private_dict.blue_fuzz;
434 break;
435
436 case PS_DICT_BLUE_SHIFT:
437 retval = sizeof ( type1->private_dict.blue_shift );
438 if ( value && value_len >= retval )
439 *((FT_Int *)value) = type1->private_dict.blue_shift;
440 break;
441
442 case PS_DICT_NUM_OTHER_BLUES:
443 retval = sizeof ( type1->private_dict.num_other_blues );
444 if ( value && value_len >= retval )
445 *((FT_Byte *)value) = type1->private_dict.num_other_blues;
446 break;
447
448 case PS_DICT_OTHER_BLUE:
449 if ( idx < type1->private_dict.num_other_blues )
450 {
451 retval = sizeof ( type1->private_dict.other_blues[idx] );
452 if ( value && value_len >= retval )
453 *((FT_Short *)value) = type1->private_dict.other_blues[idx];
454 }
455 break;
456
457 case PS_DICT_NUM_FAMILY_BLUES:
458 retval = sizeof ( type1->private_dict.num_family_blues );
459 if ( value && value_len >= retval )
460 *((FT_Byte *)value) = type1->private_dict.num_family_blues;
461 break;
462
463 case PS_DICT_FAMILY_BLUE:
464 if ( idx < type1->private_dict.num_family_blues )
465 {
466 retval = sizeof ( type1->private_dict.family_blues[idx] );
467 if ( value && value_len >= retval )
468 *((FT_Short *)value) = type1->private_dict.family_blues[idx];
469 }
470 break;
471
472 case PS_DICT_NUM_FAMILY_OTHER_BLUES:
473 retval = sizeof ( type1->private_dict.num_family_other_blues );
474 if ( value && value_len >= retval )
475 *((FT_Byte *)value) = type1->private_dict.num_family_other_blues;
476 break;
477
478 case PS_DICT_FAMILY_OTHER_BLUE:
479 if ( idx < type1->private_dict.num_family_other_blues )
480 {
481 retval = sizeof ( type1->private_dict.family_other_blues[idx] );
482 if ( value && value_len >= retval )
483 *((FT_Short *)value) = type1->private_dict.family_other_blues[idx];
484 }
485 break;
486
487 case PS_DICT_NUM_STEM_SNAP_H:
488 retval = sizeof ( type1->private_dict.num_snap_widths );
489 if ( value && value_len >= retval )
490 *((FT_Byte *)value) = type1->private_dict.num_snap_widths;
491 break;
492
493 case PS_DICT_STEM_SNAP_H:
494 if ( idx < type1->private_dict.num_snap_widths )
495 {
496 retval = sizeof ( type1->private_dict.snap_widths[idx] );
497 if ( value && value_len >= retval )
498 *((FT_Short *)value) = type1->private_dict.snap_widths[idx];
499 }
500 break;
501
502 case PS_DICT_NUM_STEM_SNAP_V:
503 retval = sizeof ( type1->private_dict.num_snap_heights );
504 if ( value && value_len >= retval )
505 *((FT_Byte *)value) = type1->private_dict.num_snap_heights;
506 break;
507
508 case PS_DICT_STEM_SNAP_V:
509 if ( idx < type1->private_dict.num_snap_heights )
510 {
511 retval = sizeof ( type1->private_dict.snap_heights[idx] );
512 if ( value && value_len >= retval )
513 *((FT_Short *)value) = type1->private_dict.snap_heights[idx];
514 }
515 break;
516
517 case PS_DICT_RND_STEM_UP:
518 retval = sizeof ( type1->private_dict.round_stem_up );
519 if ( value && value_len >= retval )
520 *((FT_Bool *)value) = type1->private_dict.round_stem_up;
521 break;
522
523 case PS_DICT_FORCE_BOLD:
524 retval = sizeof ( type1->private_dict.force_bold );
525 if ( value && value_len >= retval )
526 *((FT_Bool *)value) = type1->private_dict.force_bold;
527 break;
528
529 case PS_DICT_MIN_FEATURE:
530 if ( idx < sizeof ( type1->private_dict.min_feature ) /
531 sizeof ( type1->private_dict.min_feature[0] ) )
532 {
533 retval = sizeof ( type1->private_dict.min_feature[idx] );
534 if ( value && value_len >= retval )
535 *((FT_Short *)value) = type1->private_dict.min_feature[idx];
536 }
537 break;
538
539 case PS_DICT_LEN_IV:
540 retval = sizeof ( type1->private_dict.lenIV );
541 if ( value && value_len >= retval )
542 *((FT_Int *)value) = type1->private_dict.lenIV;
543 break;
544
545 case PS_DICT_PASSWORD:
546 retval = sizeof ( type1->private_dict.password );
547 if ( value && value_len >= retval )
548 *((FT_Long *)value) = type1->private_dict.password;
549 break;
550
551 case PS_DICT_LANGUAGE_GROUP:
552 retval = sizeof ( type1->private_dict.language_group );
553 if ( value && value_len >= retval )
554 *((FT_Long *)value) = type1->private_dict.language_group;
555 break;
556
557 case PS_DICT_IS_FIXED_PITCH:
558 retval = sizeof ( type1->font_info.is_fixed_pitch );
559 if ( value && value_len >= retval )
560 *((FT_Bool *)value) = type1->font_info.is_fixed_pitch;
561 break;
562
563 case PS_DICT_UNDERLINE_POSITION:
564 retval = sizeof ( type1->font_info.underline_position );
565 if ( value && value_len >= retval )
566 *((FT_Short *)value) = type1->font_info.underline_position;
567 break;
568
569 case PS_DICT_UNDERLINE_THICKNESS:
570 retval = sizeof ( type1->font_info.underline_thickness );
571 if ( value && value_len >= retval )
572 *((FT_UShort *)value) = type1->font_info.underline_thickness;
573 break;
574
575 case PS_DICT_FS_TYPE:
576 retval = sizeof ( type1->font_extra.fs_type );
577 if ( value && value_len >= retval )
578 *((FT_UShort *)value) = type1->font_extra.fs_type;
579 break;
580
581 case PS_DICT_VERSION:
582 if ( type1->font_info.version )
583 {
584 retval = ft_strlen( type1->font_info.version ) + 1;
585 if ( value && value_len >= retval )
586 ft_memcpy( value, (void *)( type1->font_info.version ), retval );
587 }
588 break;
589
590 case PS_DICT_NOTICE:
591 if ( type1->font_info.notice )
592 {
593 retval = ft_strlen( type1->font_info.notice ) + 1;
594 if ( value && value_len >= retval )
595 ft_memcpy( value, (void *)( type1->font_info.notice ), retval );
596 }
597 break;
598
599 case PS_DICT_FULL_NAME:
600 if ( type1->font_info.full_name )
601 {
602 retval = ft_strlen( type1->font_info.full_name ) + 1;
603 if ( value && value_len >= retval )
604 ft_memcpy( value, (void *)( type1->font_info.full_name ), retval );
605 }
606 break;
607
608 case PS_DICT_FAMILY_NAME:
609 if ( type1->font_info.family_name )
610 {
611 retval = ft_strlen( type1->font_info.family_name ) + 1;
612 if ( value && value_len >= retval )
613 ft_memcpy( value, (void *)( type1->font_info.family_name ),
614 retval );
615 }
616 break;
617
618 case PS_DICT_WEIGHT:
619 if ( type1->font_info.weight )
620 {
621 retval = ft_strlen( type1->font_info.weight ) + 1;
622 if ( value && value_len >= retval )
623 ft_memcpy( value, (void *)( type1->font_info.weight ), retval );
624 }
625 break;
626
627 case PS_DICT_ITALIC_ANGLE:
628 retval = sizeof ( type1->font_info.italic_angle );
629 if ( value && value_len >= retval )
630 *((FT_Long *)value) = type1->font_info.italic_angle;
631 break;
632 }
633
634 return retval == 0 ? -1 : (FT_Long)retval;
635 }
636
637
638 static const FT_Service_PsInfoRec t1_service_ps_info =
639 {
640 t1_ps_get_font_info, /* PS_GetFontInfoFunc ps_get_font_info */
641 t1_ps_get_font_extra, /* PS_GetFontExtraFunc ps_get_font_extra */
642 t1_ps_has_glyph_names, /* PS_HasGlyphNamesFunc ps_has_glyph_names */
643 t1_ps_get_font_private, /* PS_GetFontPrivateFunc ps_get_font_private */
644 t1_ps_get_font_value, /* PS_GetFontValueFunc ps_get_font_value */
645 };
646
647
648 #ifndef T1_CONFIG_OPTION_NO_AFM
649 static const FT_Service_KerningRec t1_service_kerning =
650 {
651 T1_Get_Track_Kerning, /* get_track */
652 };
653 #endif
654
655
656 /*
657 * PROPERTY SERVICE
658 *
659 */
660
661 FT_DEFINE_SERVICE_PROPERTIESREC(
662 t1_service_properties,
663
664 ps_property_set, /* FT_Properties_SetFunc set_property */
665 ps_property_get /* FT_Properties_GetFunc get_property */
666 )
667
668 /*
669 * SERVICE LIST
670 *
671 */
672
673 static const FT_ServiceDescRec t1_services[] =
674 {
675 { FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &t1_service_ps_name },
676 { FT_SERVICE_ID_GLYPH_DICT, &t1_service_glyph_dict },
677 { FT_SERVICE_ID_FONT_FORMAT, FT_FONT_FORMAT_TYPE_1 },
678 { FT_SERVICE_ID_POSTSCRIPT_INFO, &t1_service_ps_info },
679 { FT_SERVICE_ID_PROPERTIES, &t1_service_properties },
680
681 #ifndef T1_CONFIG_OPTION_NO_AFM
682 { FT_SERVICE_ID_KERNING, &t1_service_kerning },
683 #endif
684
685 #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
686 { FT_SERVICE_ID_MULTI_MASTERS, &t1_service_multi_masters },
687 #endif
688 { NULL, NULL }
689 };
690
691
692 FT_CALLBACK_DEF( FT_Module_Interface )
693 Get_Interface( FT_Module module,
694 const FT_String* t1_interface )
695 {
696 FT_UNUSED( module );
697
698 return ft_service_list_lookup( t1_services, t1_interface );
699 }
700
701
702 #ifndef T1_CONFIG_OPTION_NO_AFM
703
704 /**************************************************************************
705 *
706 * @Function:
707 * Get_Kerning
708 *
709 * @Description:
710 * A driver method used to return the kerning vector between two
711 * glyphs of the same face.
712 *
713 * @Input:
714 * face ::
715 * A handle to the source face object.
716 *
717 * left_glyph ::
718 * The index of the left glyph in the kern pair.
719 *
720 * right_glyph ::
721 * The index of the right glyph in the kern pair.
722 *
723 * @Output:
724 * kerning ::
725 * The kerning vector. This is in font units for
726 * scalable formats, and in pixels for fixed-sizes
727 * formats.
728 *
729 * @Return:
730 * FreeType error code. 0 means success.
731 *
732 * @Note:
733 * Only horizontal layouts (left-to-right & right-to-left) are
734 * supported by this function. Other layouts, or more sophisticated
735 * kernings are out of scope of this method (the basic driver
736 * interface is meant to be simple).
737 *
738 * They can be implemented by format-specific interfaces.
739 */
740 static FT_Error
741 Get_Kerning( FT_Face t1face, /* T1_Face */
742 FT_UInt left_glyph,
743 FT_UInt right_glyph,
744 FT_Vector* kerning )
745 {
746 T1_Face face = (T1_Face)t1face;
747
748
749 kerning->x = 0;
750 kerning->y = 0;
751
752 if ( face->afm_data )
753 T1_Get_Kerning( (AFM_FontInfo)face->afm_data,
754 left_glyph,
755 right_glyph,
756 kerning );
757
758 return FT_Err_Ok;
759 }
760
761
762 #endif /* T1_CONFIG_OPTION_NO_AFM */
763
764
765 FT_CALLBACK_TABLE_DEF
766 const FT_Driver_ClassRec t1_driver_class =
767 {
768 {
769 FT_MODULE_FONT_DRIVER |
770 FT_MODULE_DRIVER_SCALABLE |
771 FT_MODULE_DRIVER_HAS_HINTER,
772
773 sizeof ( PS_DriverRec ),
774
775 "type1",
776 0x10000L,
777 0x20000L,
778
779 NULL, /* module-specific interface */
780
781 T1_Driver_Init, /* FT_Module_Constructor module_init */
782 T1_Driver_Done, /* FT_Module_Destructor module_done */
783 Get_Interface, /* FT_Module_Requester get_interface */
784 },
785
786 sizeof ( T1_FaceRec ),
787 sizeof ( T1_SizeRec ),
788 sizeof ( T1_GlyphSlotRec ),
789
790 T1_Face_Init, /* FT_Face_InitFunc init_face */
791 T1_Face_Done, /* FT_Face_DoneFunc done_face */
792 T1_Size_Init, /* FT_Size_InitFunc init_size */
793 T1_Size_Done, /* FT_Size_DoneFunc done_size */
794 T1_GlyphSlot_Init, /* FT_Slot_InitFunc init_slot */
795 T1_GlyphSlot_Done, /* FT_Slot_DoneFunc done_slot */
796
797 T1_Load_Glyph, /* FT_Slot_LoadFunc load_glyph */
798
799 #ifdef T1_CONFIG_OPTION_NO_AFM
800 NULL, /* FT_Face_GetKerningFunc get_kerning */
801 NULL, /* FT_Face_AttachFunc attach_file */
802 #else
803 Get_Kerning, /* FT_Face_GetKerningFunc get_kerning */
804 T1_Read_Metrics, /* FT_Face_AttachFunc attach_file */
805 #endif
806 T1_Get_Advances, /* FT_Face_GetAdvancesFunc get_advances */
807
808 T1_Size_Request, /* FT_Size_RequestFunc request_size */
809 NULL /* FT_Size_SelectFunc select_size */
810 };
811
812
813 /* END */