aboutsummaryrefslogtreecommitdiff
path: root/freetype/src/type1/t1driver.c
blob: 2602bdb6ffca4f22e9ca6b5f3e60c59414ebed98 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
/***************************************************************************/
/*                                                                         */
/*  t1driver.c                                                             */
/*                                                                         */
/*    Type 1 driver interface (body).                                      */
/*                                                                         */
/*  Copyright 1996-2004, 2006, 2007, 2009, 2011, 2013, 2014 by             */
/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
/*                                                                         */
/*  This file is part of the FreeType project, and may only be used,       */
/*  modified, and distributed under the terms of the FreeType project      */
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
/*  this file you indicate that you have read the license and              */
/*  understand and accept it fully.                                        */
/*                                                                         */
/***************************************************************************/


#include <ft2build.h>
#include "t1driver.h"
#include "t1gload.h"
#include "t1load.h"

#include "t1errors.h"

#ifndef T1_CONFIG_OPTION_NO_AFM
#include "t1afm.h"
#endif

#include FT_INTERNAL_DEBUG_H
#include FT_INTERNAL_STREAM_H

#include FT_SERVICE_MULTIPLE_MASTERS_H
#include FT_SERVICE_GLYPH_DICT_H
#include FT_SERVICE_XFREE86_NAME_H
#include FT_SERVICE_POSTSCRIPT_NAME_H
#include FT_SERVICE_POSTSCRIPT_CMAPS_H
#include FT_SERVICE_POSTSCRIPT_INFO_H
#include FT_SERVICE_KERNING_H


  /*************************************************************************/
  /*                                                                       */
  /* The macro FT_COMPONENT is used in trace mode.  It is an implicit      */
  /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log  */
  /* messages during execution.                                            */
  /*                                                                       */
#undef  FT_COMPONENT
#define FT_COMPONENT  trace_t1driver

 /*
  *  GLYPH DICT SERVICE
  *
  */

  static FT_Error
  t1_get_glyph_name( T1_Face     face,
                     FT_UInt     glyph_index,
                     FT_Pointer  buffer,
                     FT_UInt     buffer_max )
  {
    FT_STRCPYN( buffer, face->type1.glyph_names[glyph_index], buffer_max );

    return FT_Err_Ok;
  }


  static FT_UInt
  t1_get_name_index( T1_Face     face,
                     FT_String*  glyph_name )
  {
    FT_Int  i;


    for ( i = 0; i < face->type1.num_glyphs; i++ )
    {
      FT_String*  gname = face->type1.glyph_names[i];


      if ( !ft_strcmp( glyph_name, gname ) )
        return (FT_UInt)i;
    }

    return 0;
  }


  static const FT_Service_GlyphDictRec  t1_service_glyph_dict =
  {
    (FT_GlyphDict_GetNameFunc)  t1_get_glyph_name,
    (FT_GlyphDict_NameIndexFunc)t1_get_name_index
  };


  /*
   *  POSTSCRIPT NAME SERVICE
   *
   */

  static const char*
  t1_get_ps_name( T1_Face  face )
  {
    return (const char*) face->type1.font_name;
  }


  static const FT_Service_PsFontNameRec  t1_service_ps_name =
  {
    (FT_PsName_GetFunc)t1_get_ps_name
  };


  /*
   *  MULTIPLE MASTERS SERVICE
   *
   */

#ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
  static const FT_Service_MultiMastersRec  t1_service_multi_masters =
  {
    (FT_Get_MM_Func)        T1_Get_Multi_Master,
    (FT_Set_MM_Design_Func) T1_Set_MM_Design,
    (FT_Set_MM_Blend_Func)  T1_Set_MM_Blend,
    (FT_Get_MM_Var_Func)    T1_Get_MM_Var,
    (FT_Set_Var_Design_Func)T1_Set_Var_Design
  };
#endif


  /*
   *  POSTSCRIPT INFO SERVICE
   *
   */

  static FT_Error
  t1_ps_get_font_info( FT_Face          face,
                       PS_FontInfoRec*  afont_info )
  {
    *afont_info = ((T1_Face)face)->type1.font_info;

    return FT_Err_Ok;
  }


  static FT_Error
  t1_ps_get_font_extra( FT_Face           face,
                        PS_FontExtraRec*  afont_extra )
  {
    *afont_extra = ((T1_Face)face)->type1.font_extra;

    return FT_Err_Ok;
  }


  static FT_Int
  t1_ps_has_glyph_names( FT_Face  face )
  {
    FT_UNUSED( face );

    return 1;
  }


  static FT_Error
  t1_ps_get_font_private( FT_Face         face,
                          PS_PrivateRec*  afont_private )
  {
    *afont_private = ((T1_Face)face)->type1.private_dict;

    return FT_Err_Ok;
  }


  static FT_Long
  t1_ps_get_font_value( FT_Face       face,
                        PS_Dict_Keys  key,
                        FT_UInt       idx,
                        void         *value,
                        FT_Long       value_len )
  {
    FT_Long  retval = -1;
    T1_Face  t1face = (T1_Face)face;
    T1_Font  type1  = &t1face->type1;


    switch ( key )
    {
    case PS_DICT_FONT_TYPE:
      retval = sizeof ( type1->font_type );
      if ( value && value_len >= retval )
        *((FT_Byte *)value) = type1->font_type;
      break;

    case PS_DICT_FONT_MATRIX:
      if ( idx < sizeof ( type1->font_matrix ) /
                   sizeof ( type1->font_matrix.xx ) )
      {
        FT_Fixed  val = 0;


        retval = sizeof ( val );
        if ( value && value_len >= retval )
        {
          switch ( idx )
          {
          case 0:
            val = type1->font_matrix.xx;
            break;
          case 1:
            val = type1->font_matrix.xy;
            break;
          case 2:
            val = type1->font_matrix.yx;
            break;
          case 3:
            val = type1->font_matrix.yy;
            break;
          }
          *((FT_Fixed *)value) = val;
        }
      }
      break;

    case PS_DICT_FONT_BBOX:
      if ( idx < sizeof ( type1->font_bbox ) /
                   sizeof ( type1->font_bbox.xMin ) )
      {
        FT_Fixed val = 0;


        retval = sizeof ( val );
        if ( value && value_len >= retval )
        {
          switch ( idx )
          {
          case 0:
            val = type1->font_bbox.xMin;
            break;
          case 1:
            val = type1->font_bbox.yMin;
            break;
          case 2:
            val = type1->font_bbox.xMax;
            break;
          case 3:
            val = type1->font_bbox.yMax;
            break;
          }
          *((FT_Fixed *)value) = val;
        }
      }
      break;

    case PS_DICT_PAINT_TYPE:
      retval = sizeof ( type1->paint_type );
      if ( value && value_len >= retval )
        *((FT_Byte *)value) = type1->paint_type;
      break;

    case PS_DICT_FONT_NAME:
      retval = (FT_Long)( ft_strlen( type1->font_name ) + 1 );
      if ( value && value_len >= retval )
        ft_memcpy( value, (void *)( type1->font_name ), retval );
      break;

    case PS_DICT_UNIQUE_ID:
      retval = sizeof ( type1->private_dict.unique_id );
      if ( value && value_len >= retval )
        *((FT_Int *)value) = type1->private_dict.unique_id;
      break;

    case PS_DICT_NUM_CHAR_STRINGS:
      retval = sizeof ( type1->num_glyphs );
      if ( value && value_len >= retval )
        *((FT_Int *)value) = type1->num_glyphs;
      break;

    case PS_DICT_CHAR_STRING_KEY:
      if ( idx < (FT_UInt)type1->num_glyphs )
      {
        retval = (FT_Long)( ft_strlen( type1->glyph_names[idx] ) + 1 );
        if ( value && value_len >= retval )
        {
          ft_memcpy( value, (void *)( type1->glyph_names[idx] ), retval );
          ((FT_Char *)value)[retval - 1] = (FT_Char)'\0';
        }
      }
      break;

    case PS_DICT_CHAR_STRING:
      if ( idx < (FT_UInt)type1->num_glyphs )
      {
        retval = (FT_Long)( type1->charstrings_len[idx] + 1 );
        if ( value && value_len >= retval )
        {
          ft_memcpy( value, (void *)( type1->charstrings[idx] ),
                     retval - 1 );
          ((FT_Char *)value)[retval - 1] = (FT_Char)'\0';
        }
      }
      break;

    case PS_DICT_ENCODING_TYPE:
      retval = sizeof ( type1->encoding_type );
      if ( value && value_len >= retval )
        *((T1_EncodingType *)value) = type1->encoding_type;
      break;

    case PS_DICT_ENCODING_ENTRY:
      if ( type1->encoding_type == T1_ENCODING_TYPE_ARRAY &&
           idx < (FT_UInt)type1->encoding.num_chars       )
      {
        retval = (FT_Long)( ft_strlen( type1->encoding.char_name[idx] ) + 1 );
        if ( value && value_len >= retval )
        {
          ft_memcpy( value, (void *)( type1->encoding.char_name[idx] ),
                     retval - 1 );
          ((FT_Char *)value)[retval - 1] = (FT_Char)'\0';
        }
      }
      break;

    case PS_DICT_NUM_SUBRS:
      retval = sizeof ( type1->num_subrs );
      if ( value && value_len >= retval )
        *((FT_Int *)value) = type1->num_subrs;
      break;

    case PS_DICT_SUBR:
      if ( idx < (FT_UInt)type1->num_subrs )
      {
        retval = (FT_Long)( type1->subrs_len[idx] + 1 );
        if ( value && value_len >= retval )
        {
          ft_memcpy( value, (void *)( type1->subrs[idx] ), retval - 1 );
          ((FT_Char *)value)[retval - 1] = (FT_Char)'\0';
        }
      }
      break;

    case PS_DICT_STD_HW:
      retval = sizeof ( type1->private_dict.standard_width[0] );
      if ( value && value_len >= retval )
        *((FT_UShort *)value) = type1->private_dict.standard_width[0];
      break;

    case PS_DICT_STD_VW:
      retval = sizeof ( type1->private_dict.standard_height[0] );
      if ( value && value_len >= retval )
        *((FT_UShort *)value) = type1->private_dict.standard_height[0];
      break;

    case PS_DICT_NUM_BLUE_VALUES:
      retval = sizeof ( type1->private_dict.num_blue_values );
      if ( value && value_len >= retval )
        *((FT_Byte *)value) = type1->private_dict.num_blue_values;
      break;

    case PS_DICT_BLUE_VALUE:
      if ( idx < type1->private_dict.num_blue_values )
      {
        retval = sizeof ( type1->private_dict.blue_values[idx] );
        if ( value && value_len >= retval )
          *((FT_Short *)value) = type1->private_dict.blue_values[idx];
      }
      break;

    case PS_DICT_BLUE_SCALE:
      retval = sizeof ( type1->private_dict.blue_scale );
      if ( value && value_len >= retval )
        *((FT_Fixed *)value) = type1->private_dict.blue_scale;
      break;

    case PS_DICT_BLUE_FUZZ:
      retval = sizeof ( type1->private_dict.blue_fuzz );
      if ( value && value_len >= retval )
        *((FT_Int *)value) = type1->private_dict.blue_fuzz;
      break;

    case PS_DICT_BLUE_SHIFT:
      retval = sizeof ( type1->private_dict.blue_shift );
      if ( value && value_len >= retval )
        *((FT_Int *)value) = type1->private_dict.blue_shift;
      break;

    case PS_DICT_NUM_OTHER_BLUES:
      retval = sizeof ( type1->private_dict.num_other_blues );
      if ( value && value_len >= retval )
        *((FT_Byte *)value) = type1->private_dict.num_other_blues;
      break;

    case PS_DICT_OTHER_BLUE:
      if ( idx < type1->private_dict.num_other_blues )
      {
        retval = sizeof ( type1->private_dict.other_blues[idx] );
        if ( value && value_len >= retval )
          *((FT_Short *)value) = type1->private_dict.other_blues[idx];
      }
      break;

    case PS_DICT_NUM_FAMILY_BLUES:
      retval = sizeof ( type1->private_dict.num_family_blues );
      if ( value && value_len >= retval )
        *((FT_Byte *)value) = type1->private_dict.num_family_blues;
      break;

    case PS_DICT_FAMILY_BLUE:
      if ( idx < type1->private_dict.num_family_blues )
      {
        retval = sizeof ( type1->private_dict.family_blues[idx] );
        if ( value && value_len >= retval )
          *((FT_Short *)value) = type1->private_dict.family_blues[idx];
      }
      break;

    case PS_DICT_NUM_FAMILY_OTHER_BLUES:
      retval = sizeof ( type1->private_dict.num_family_other_blues );
      if ( value && value_len >= retval )
        *((FT_Byte *)value) = type1->private_dict.num_family_other_blues;
      break;

    case PS_DICT_FAMILY_OTHER_BLUE:
      if ( idx < type1->private_dict.num_family_other_blues )
      {
        retval = sizeof ( type1->private_dict.family_other_blues[idx] );
        if ( value && value_len >= retval )
          *((FT_Short *)value) = type1->private_dict.family_other_blues[idx];
      }
      break;

    case PS_DICT_NUM_STEM_SNAP_H:
      retval = sizeof ( type1->private_dict.num_snap_widths );
      if ( value && value_len >= retval )
        *((FT_Byte *)value) = type1->private_dict.num_snap_widths;
      break;

    case PS_DICT_STEM_SNAP_H:
      if ( idx < type1->private_dict.num_snap_widths )
      {
        retval = sizeof ( type1->private_dict.snap_widths[idx] );
        if ( value && value_len >= retval )
          *((FT_Short *)value) = type1->private_dict.snap_widths[idx];
      }
      break;

    case PS_DICT_NUM_STEM_SNAP_V:
      retval = sizeof ( type1->private_dict.num_snap_heights );
      if ( value && value_len >= retval )
        *((FT_Byte *)value) = type1->private_dict.num_snap_heights;
      break;

    case PS_DICT_STEM_SNAP_V:
      if ( idx < type1->private_dict.num_snap_heights )
      {
        retval = sizeof ( type1->private_dict.snap_heights[idx] );
        if ( value && value_len >= retval )
          *((FT_Short *)value) = type1->private_dict.snap_heights[idx];
      }
      break;

    case PS_DICT_RND_STEM_UP:
      retval = sizeof ( type1->private_dict.round_stem_up );
      if ( value && value_len >= retval )
        *((FT_Bool *)value) = type1->private_dict.round_stem_up;
      break;

    case PS_DICT_FORCE_BOLD:
      retval = sizeof ( type1->private_dict.force_bold );
      if ( value && value_len >= retval )
        *((FT_Bool *)value) = type1->private_dict.force_bold;
      break;

    case PS_DICT_MIN_FEATURE:
      if ( idx < sizeof ( type1->private_dict.min_feature ) /
                   sizeof ( type1->private_dict.min_feature[0] ) )
      {
        retval = sizeof ( type1->private_dict.min_feature[idx] );
        if ( value && value_len >= retval )
          *((FT_Short *)value) = type1->private_dict.min_feature[idx];
      }
      break;

    case PS_DICT_LEN_IV:
      retval = sizeof ( type1->private_dict.lenIV );
      if ( value && value_len >= retval )
        *((FT_Int *)value) = type1->private_dict.lenIV;
      break;

    case PS_DICT_PASSWORD:
      retval = sizeof ( type1->private_dict.password );
      if ( value && value_len >= retval )
        *((FT_Long *)value) = type1->private_dict.password;
      break;

    case PS_DICT_LANGUAGE_GROUP:
      retval = sizeof ( type1->private_dict.language_group );
      if ( value && value_len >= retval )
        *((FT_Long *)value) = type1->private_dict.language_group;
      break;

    case PS_DICT_IS_FIXED_PITCH:
      retval = sizeof ( type1->font_info.is_fixed_pitch );
      if ( value && value_len >= retval )
        *((FT_Bool *)value) = type1->font_info.is_fixed_pitch;
      break;

    case PS_DICT_UNDERLINE_POSITION:
      retval = sizeof ( type1->font_info.underline_position );
      if ( value && value_len >= retval )
        *((FT_Short *)value) = type1->font_info.underline_position;
      break;

    case PS_DICT_UNDERLINE_THICKNESS:
      retval = sizeof ( type1->font_info.underline_thickness );
      if ( value && value_len >= retval )
        *((FT_UShort *)value) = type1->font_info.underline_thickness;
      break;

    case PS_DICT_FS_TYPE:
      retval = sizeof ( type1->font_extra.fs_type );
      if ( value && value_len >= retval )
        *((FT_UShort *)value) = type1->font_extra.fs_type;
      break;

    case PS_DICT_VERSION:
      retval = (FT_Long)( ft_strlen( type1->font_info.version ) + 1 );
      if ( value && value_len >= retval )
        ft_memcpy( value, (void *)( type1->font_info.version ), retval );
      break;

    case PS_DICT_NOTICE:
      retval = (FT_Long)( ft_strlen( type1->font_info.notice ) + 1 );
      if ( value && value_len >= retval )
        ft_memcpy( value, (void *)( type1->font_info.notice ), retval );
      break;

    case PS_DICT_FULL_NAME:
      retval = (FT_Long)( ft_strlen( type1->font_info.full_name ) + 1 );
      if ( value && value_len >= retval )
        ft_memcpy( value, (void *)( type1->font_info.full_name ), retval );
      break;

    case PS_DICT_FAMILY_NAME:
      retval = (FT_Long)( ft_strlen( type1->font_info.family_name ) + 1 );
      if ( value && value_len >= retval )
        ft_memcpy( value, (void *)( type1->font_info.family_name ), retval );
      break;

    case PS_DICT_WEIGHT:
      retval = (FT_Long)( ft_strlen( type1->font_info.weight ) + 1 );
      if ( value && value_len >= retval )
        ft_memcpy( value, (void *)( type1->font_info.weight ), retval );
      break;

    case PS_DICT_ITALIC_ANGLE:
      retval = sizeof ( type1->font_info.italic_angle );
      if ( value && value_len >= retval )
        *((FT_Long *)value) = type1->font_info.italic_angle;
      break;
    }

    return retval;
  }


  static const FT_Service_PsInfoRec  t1_service_ps_info =
  {
    (PS_GetFontInfoFunc)   t1_ps_get_font_info,
    (PS_GetFontExtraFunc)  t1_ps_get_font_extra,
    (PS_HasGlyphNamesFunc) t1_ps_has_glyph_names,
    (PS_GetFontPrivateFunc)t1_ps_get_font_private,
    (PS_GetFontValueFunc)  t1_ps_get_font_value,
  };


#ifndef T1_CONFIG_OPTION_NO_AFM
  static const FT_Service_KerningRec  t1_service_kerning =
  {
    T1_Get_Track_Kerning,
  };
#endif


  /*
   *  SERVICE LIST
   *
   */

  static const FT_ServiceDescRec  t1_services[] =
  {
    { FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &t1_service_ps_name },
    { FT_SERVICE_ID_GLYPH_DICT,           &t1_service_glyph_dict },
    { FT_SERVICE_ID_XF86_NAME,            FT_XF86_FORMAT_TYPE_1 },
    { FT_SERVICE_ID_POSTSCRIPT_INFO,      &t1_service_ps_info },

#ifndef T1_CONFIG_OPTION_NO_AFM
    { FT_SERVICE_ID_KERNING,              &t1_service_kerning },
#endif

#ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
    { FT_SERVICE_ID_MULTI_MASTERS,        &t1_service_multi_masters },
#endif
    { NULL, NULL }
  };


  FT_CALLBACK_DEF( FT_Module_Interface )
  Get_Interface( FT_Module         module,
                 const FT_String*  t1_interface )
  {
    FT_UNUSED( module );

    return ft_service_list_lookup( t1_services, t1_interface );
  }


#ifndef T1_CONFIG_OPTION_NO_AFM

  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    Get_Kerning                                                        */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A driver method used to return the kerning vector between two      */
  /*    glyphs of the same face.                                           */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face        :: A handle to the source face object.                 */
  /*                                                                       */
  /*    left_glyph  :: The index of the left glyph in the kern pair.       */
  /*                                                                       */
  /*    right_glyph :: The index of the right glyph in the kern pair.      */
  /*                                                                       */
  /* <Output>                                                              */
  /*    kerning     :: The kerning vector.  This is in font units for      */
  /*                   scalable formats, and in pixels for fixed-sizes     */
  /*                   formats.                                            */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0 means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    Only horizontal layouts (left-to-right & right-to-left) are        */
  /*    supported by this function.  Other layouts, or more sophisticated  */
  /*    kernings are out of scope of this method (the basic driver         */
  /*    interface is meant to be simple).                                  */
  /*                                                                       */
  /*    They can be implemented by format-specific interfaces.             */
  /*                                                                       */
  static FT_Error
  Get_Kerning( FT_Face     t1face,        /* T1_Face */
               FT_UInt     left_glyph,
               FT_UInt     right_glyph,
               FT_Vector*  kerning )
  {
    T1_Face  face = (T1_Face)t1face;


    kerning->x = 0;
    kerning->y = 0;

    if ( face->afm_data )
      T1_Get_Kerning( (AFM_FontInfo)face->afm_data,
                      left_glyph,
                      right_glyph,
                      kerning );

    return FT_Err_Ok;
  }


#endif /* T1_CONFIG_OPTION_NO_AFM */


  FT_CALLBACK_TABLE_DEF
  const FT_Driver_ClassRec  t1_driver_class =
  {
    {
      FT_MODULE_FONT_DRIVER       |
      FT_MODULE_DRIVER_SCALABLE   |
      FT_MODULE_DRIVER_HAS_HINTER,

      sizeof ( FT_DriverRec ),

      "type1",
      0x10000L,
      0x20000L,

      0,   /* format interface */

      T1_Driver_Init,
      T1_Driver_Done,
      Get_Interface,
    },

    sizeof ( T1_FaceRec ),
    sizeof ( T1_SizeRec ),
    sizeof ( T1_GlyphSlotRec ),

    T1_Face_Init,
    T1_Face_Done,
    T1_Size_Init,
    T1_Size_Done,
    T1_GlyphSlot_Init,
    T1_GlyphSlot_Done,

    T1_Load_Glyph,

#ifdef T1_CONFIG_OPTION_NO_AFM
    0,                     /* FT_Face_GetKerningFunc */
    0,                     /* FT_Face_AttachFunc     */
#else
    Get_Kerning,
    T1_Read_Metrics,
#endif
    T1_Get_Advances,
    T1_Size_Request,
    0                      /* FT_Size_SelectFunc     */
  };


/* END */