aboutsummaryrefslogtreecommitdiff
path: root/freetype/src/pfr/pfrgload.c
blob: 7b067ea16c1e2f3df444aa41919ab020a3b2f981 (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
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
/***************************************************************************/
/*                                                                         */
/*  pfrgload.c                                                             */
/*                                                                         */
/*    FreeType PFR glyph loader (body).                                    */
/*                                                                         */
/*  Copyright 2002, 2003, 2005, 2007, 2010, 2013 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 "pfrgload.h"
#include "pfrsbit.h"
#include "pfrload.h"            /* for macro definitions */
#include <freetype/internal/ftdebug.h>

#include "pfrerror.h"

#undef  FT_COMPONENT
#define FT_COMPONENT  trace_pfr


  /*************************************************************************/
  /*************************************************************************/
  /*****                                                               *****/
  /*****                      PFR GLYPH BUILDER                        *****/
  /*****                                                               *****/
  /*************************************************************************/
  /*************************************************************************/


  FT_LOCAL_DEF( void )
  pfr_glyph_init( PFR_Glyph       glyph,
                  FT_GlyphLoader  loader )
  {
    FT_ZERO( glyph );

    glyph->loader     = loader;
    glyph->path_begun = 0;

    FT_GlyphLoader_Rewind( loader );
  }


  FT_LOCAL_DEF( void )
  pfr_glyph_done( PFR_Glyph  glyph )
  {
    FT_Memory  memory = glyph->loader->memory;


    FT_FREE( glyph->x_control );
    glyph->y_control = NULL;

    glyph->max_xy_control = 0;
#if 0
    glyph->num_x_control  = 0;
    glyph->num_y_control  = 0;
#endif

    FT_FREE( glyph->subs );

    glyph->max_subs = 0;
    glyph->num_subs = 0;

    glyph->loader     = NULL;
    glyph->path_begun = 0;
  }


  /* close current contour, if any */
  static void
  pfr_glyph_close_contour( PFR_Glyph  glyph )
  {
    FT_GlyphLoader  loader  = glyph->loader;
    FT_Outline*     outline = &loader->current.outline;
    FT_Int          last, first;


    if ( !glyph->path_begun )
      return;

    /* compute first and last point indices in current glyph outline */
    last  = outline->n_points - 1;
    first = 0;
    if ( outline->n_contours > 0 )
      first = outline->contours[outline->n_contours - 1];

    /* if the last point falls on the same location than the first one */
    /* we need to delete it                                            */
    if ( last > first )
    {
      FT_Vector*  p1 = outline->points + first;
      FT_Vector*  p2 = outline->points + last;


      if ( p1->x == p2->x && p1->y == p2->y )
      {
        outline->n_points--;
        last--;
      }
    }

    /* don't add empty contours */
    if ( last >= first )
      outline->contours[outline->n_contours++] = (short)last;

    glyph->path_begun = 0;
  }


  /* reset glyph to start the loading of a new glyph */
  static void
  pfr_glyph_start( PFR_Glyph  glyph )
  {
    glyph->path_begun = 0;
  }


  static FT_Error
  pfr_glyph_line_to( PFR_Glyph   glyph,
                     FT_Vector*  to )
  {
    FT_GlyphLoader  loader  = glyph->loader;
    FT_Outline*     outline = &loader->current.outline;
    FT_Error        error;


    /* check that we have begun a new path */
    if ( !glyph->path_begun )
    {
      error = FT_THROW( Invalid_Table );
      FT_ERROR(( "pfr_glyph_line_to: invalid glyph data\n" ));
      goto Exit;
    }

    error = FT_GLYPHLOADER_CHECK_POINTS( loader, 1, 0 );
    if ( !error )
    {
      FT_UInt  n = outline->n_points;


      outline->points[n] = *to;
      outline->tags  [n] = FT_CURVE_TAG_ON;

      outline->n_points++;
    }

  Exit:
    return error;
  }


  static FT_Error
  pfr_glyph_curve_to( PFR_Glyph   glyph,
                      FT_Vector*  control1,
                      FT_Vector*  control2,
                      FT_Vector*  to )
  {
    FT_GlyphLoader  loader  = glyph->loader;
    FT_Outline*     outline = &loader->current.outline;
    FT_Error        error;


    /* check that we have begun a new path */
    if ( !glyph->path_begun )
    {
      error = FT_THROW( Invalid_Table );
      FT_ERROR(( "pfr_glyph_line_to: invalid glyph data\n" ));
      goto Exit;
    }

    error = FT_GLYPHLOADER_CHECK_POINTS( loader, 3, 0 );
    if ( !error )
    {
      FT_Vector*  vec = outline->points         + outline->n_points;
      FT_Byte*    tag = (FT_Byte*)outline->tags + outline->n_points;


      vec[0] = *control1;
      vec[1] = *control2;
      vec[2] = *to;
      tag[0] = FT_CURVE_TAG_CUBIC;
      tag[1] = FT_CURVE_TAG_CUBIC;
      tag[2] = FT_CURVE_TAG_ON;

      outline->n_points = (FT_Short)( outline->n_points + 3 );
    }

  Exit:
    return error;
  }


  static FT_Error
  pfr_glyph_move_to( PFR_Glyph   glyph,
                     FT_Vector*  to )
  {
    FT_GlyphLoader  loader  = glyph->loader;
    FT_Error        error;


    /* close current contour if any */
    pfr_glyph_close_contour( glyph );

    /* indicate that a new contour has started */
    glyph->path_begun = 1;

    /* check that there is space for a new contour and a new point */
    error = FT_GLYPHLOADER_CHECK_POINTS( loader, 1, 1 );
    if ( !error )
      /* add new start point */
      error = pfr_glyph_line_to( glyph, to );

    return error;
  }


  static void
  pfr_glyph_end( PFR_Glyph  glyph )
  {
    /* close current contour if any */
    pfr_glyph_close_contour( glyph );

    /* merge the current glyph into the stack */
    FT_GlyphLoader_Add( glyph->loader );
  }


  /*************************************************************************/
  /*************************************************************************/
  /*****                                                               *****/
  /*****                      PFR GLYPH LOADER                         *****/
  /*****                                                               *****/
  /*************************************************************************/
  /*************************************************************************/


  /* load a simple glyph */
  static FT_Error
  pfr_glyph_load_simple( PFR_Glyph  glyph,
                         FT_Byte*   p,
                         FT_Byte*   limit )
  {
    FT_Error   error  = FT_Err_Ok;
    FT_Memory  memory = glyph->loader->memory;
    FT_UInt    flags, x_count, y_count, i, count, mask;
    FT_Int     x;


    PFR_CHECK( 1 );
    flags = PFR_NEXT_BYTE( p );

    /* test for composite glyphs */
    if ( flags & PFR_GLYPH_IS_COMPOUND )
      goto Failure;

    x_count = 0;
    y_count = 0;

    if ( flags & PFR_GLYPH_1BYTE_XYCOUNT )
    {
      PFR_CHECK( 1 );
      count   = PFR_NEXT_BYTE( p );
      x_count = count & 15;
      y_count = count >> 4;
    }
    else
    {
      if ( flags & PFR_GLYPH_XCOUNT )
      {
        PFR_CHECK( 1 );
        x_count = PFR_NEXT_BYTE( p );
      }

      if ( flags & PFR_GLYPH_YCOUNT )
      {
        PFR_CHECK( 1 );
        y_count = PFR_NEXT_BYTE( p );
      }
    }

    count = x_count + y_count;

    /* re-allocate array when necessary */
    if ( count > glyph->max_xy_control )
    {
      FT_UInt  new_max = FT_PAD_CEIL( count, 8 );


      if ( FT_RENEW_ARRAY( glyph->x_control,
                           glyph->max_xy_control,
                           new_max ) )
        goto Exit;

      glyph->max_xy_control = new_max;
    }

    glyph->y_control = glyph->x_control + x_count;

    mask  = 0;
    x     = 0;

    for ( i = 0; i < count; i++ )
    {
      if ( ( i & 7 ) == 0 )
      {
        PFR_CHECK( 1 );
        mask = PFR_NEXT_BYTE( p );
      }

      if ( mask & 1 )
      {
        PFR_CHECK( 2 );
        x = PFR_NEXT_SHORT( p );
      }
      else
      {
        PFR_CHECK( 1 );
        x += PFR_NEXT_BYTE( p );
      }

      glyph->x_control[i] = x;

      mask >>= 1;
    }

    /* XXX: for now we ignore the secondary stroke and edge definitions */
    /*      since we don't want to support native PFR hinting           */
    /*                                                                  */
    if ( flags & PFR_GLYPH_EXTRA_ITEMS )
    {
      error = pfr_extra_items_skip( &p, limit );
      if ( error )
        goto Exit;
    }

    pfr_glyph_start( glyph );

    /* now load a simple glyph */
    {
      FT_Vector   pos[4];
      FT_Vector*  cur;


      pos[0].x = pos[0].y = 0;
      pos[3]   = pos[0];

      for (;;)
      {
        FT_UInt  format, format_low, args_format = 0, args_count, n;


        /***************************************************************/
        /*  read instruction                                           */
        /*                                                             */
        PFR_CHECK( 1 );
        format     = PFR_NEXT_BYTE( p );
        format_low = format & 15;

        switch ( format >> 4 )
        {
        case 0:                             /* end glyph */
          FT_TRACE6(( "- end glyph" ));
          args_count = 0;
          break;

        case 1:                             /* general line operation */
          FT_TRACE6(( "- general line" ));
          goto Line1;

        case 4:                             /* move to inside contour  */
          FT_TRACE6(( "- move to inside" ));
          goto Line1;

        case 5:                             /* move to outside contour */
          FT_TRACE6(( "- move to outside" ));
        Line1:
          args_format = format_low;
          args_count  = 1;
          break;

        case 2:                             /* horizontal line to */
          FT_TRACE6(( "- horizontal line to cx.%d", format_low ));
          if ( format_low >= x_count )
            goto Failure;
          pos[0].x   = glyph->x_control[format_low];
          pos[0].y   = pos[3].y;
          pos[3]     = pos[0];
          args_count = 0;
          break;

        case 3:                             /* vertical line to */
          FT_TRACE6(( "- vertical line to cy.%d", format_low ));
          if ( format_low >= y_count )
            goto Failure;
          pos[0].x   = pos[3].x;
          pos[0].y   = glyph->y_control[format_low];
          pos[3]     = pos[0];
          args_count = 0;
          break;

        case 6:                             /* horizontal to vertical curve */
          FT_TRACE6(( "- hv curve " ));
          args_format = 0xB8E;
          args_count  = 3;
          break;

        case 7:                             /* vertical to horizontal curve */
          FT_TRACE6(( "- vh curve" ));
          args_format = 0xE2B;
          args_count  = 3;
          break;

        default:                            /* general curve to */
          FT_TRACE6(( "- general curve" ));
          args_count  = 4;
          args_format = format_low;
        }

        /***********************************************************/
        /*  now read arguments                                     */
        /*                                                         */
        cur = pos;
        for ( n = 0; n < args_count; n++ )
        {
          FT_UInt  idx;
          FT_Int   delta;


          /* read the X argument */
          switch ( args_format & 3 )
          {
          case 0:                           /* 8-bit index */
            PFR_CHECK( 1 );
            idx  = PFR_NEXT_BYTE( p );
            if ( idx >= x_count )
              goto Failure;
            cur->x = glyph->x_control[idx];
            FT_TRACE7(( " cx#%d", idx ));
            break;

          case 1:                           /* 16-bit value */
            PFR_CHECK( 2 );
            cur->x = PFR_NEXT_SHORT( p );
            FT_TRACE7(( " x.%d", cur->x ));
            break;

          case 2:                           /* 8-bit delta */
            PFR_CHECK( 1 );
            delta  = PFR_NEXT_INT8( p );
            cur->x = pos[3].x + delta;
            FT_TRACE7(( " dx.%d", delta ));
            break;

          default:
            FT_TRACE7(( " |" ));
            cur->x = pos[3].x;
          }

          /* read the Y argument */
          switch ( ( args_format >> 2 ) & 3 )
          {
          case 0:                           /* 8-bit index */
            PFR_CHECK( 1 );
            idx  = PFR_NEXT_BYTE( p );
            if ( idx >= y_count )
              goto Failure;
            cur->y = glyph->y_control[idx];
            FT_TRACE7(( " cy#%d", idx ));
            break;

          case 1:                           /* 16-bit absolute value */
            PFR_CHECK( 2 );
            cur->y = PFR_NEXT_SHORT( p );
            FT_TRACE7(( " y.%d", cur->y ));
            break;

          case 2:                           /* 8-bit delta */
            PFR_CHECK( 1 );
            delta  = PFR_NEXT_INT8( p );
            cur->y = pos[3].y + delta;
            FT_TRACE7(( " dy.%d", delta ));
            break;

          default:
            FT_TRACE7(( " -" ));
            cur->y = pos[3].y;
          }

          /* read the additional format flag for the general curve */
          if ( n == 0 && args_count == 4 )
          {
            PFR_CHECK( 1 );
            args_format = PFR_NEXT_BYTE( p );
            args_count--;
          }
          else
            args_format >>= 4;

          /* save the previous point */
          pos[3] = cur[0];
          cur++;
        }

        FT_TRACE7(( "\n" ));

        /***********************************************************/
        /*  finally, execute instruction                           */
        /*                                                         */
        switch ( format >> 4 )
        {
        case 0:                             /* end glyph => EXIT */
          pfr_glyph_end( glyph );
          goto Exit;

        case 1:                             /* line operations */
        case 2:
        case 3:
          error = pfr_glyph_line_to( glyph, pos );
          goto Test_Error;

        case 4:                             /* move to inside contour  */
        case 5:                             /* move to outside contour */
          error = pfr_glyph_move_to( glyph, pos );
          goto Test_Error;

        default:                            /* curve operations */
          error = pfr_glyph_curve_to( glyph, pos, pos + 1, pos + 2 );

        Test_Error:  /* test error condition */
          if ( error )
            goto Exit;
        }
      } /* for (;;) */
    }

  Exit:
    return error;

  Failure:
  Too_Short:
    error = FT_THROW( Invalid_Table );
    FT_ERROR(( "pfr_glyph_load_simple: invalid glyph data\n" ));
    goto Exit;
  }


  /* load a composite/compound glyph */
  static FT_Error
  pfr_glyph_load_compound( PFR_Glyph  glyph,
                           FT_Byte*   p,
                           FT_Byte*   limit )
  {
    FT_Error        error  = FT_Err_Ok;
    FT_GlyphLoader  loader = glyph->loader;
    FT_Memory       memory = loader->memory;
    PFR_SubGlyph    subglyph;
    FT_UInt         flags, i, count, org_count;
    FT_Int          x_pos, y_pos;


    PFR_CHECK( 1 );
    flags = PFR_NEXT_BYTE( p );

    /* test for composite glyphs */
    if ( !( flags & PFR_GLYPH_IS_COMPOUND ) )
      goto Failure;

    count = flags & 0x3F;

    /* ignore extra items when present */
    /*                                 */
    if ( flags & PFR_GLYPH_EXTRA_ITEMS )
    {
      error = pfr_extra_items_skip( &p, limit );
      if (error) goto Exit;
    }

    /* we can't rely on the FT_GlyphLoader to load sub-glyphs, because   */
    /* the PFR format is dumb, using direct file offsets to point to the */
    /* sub-glyphs (instead of glyph indices).  Sigh.                     */
    /*                                                                   */
    /* For now, we load the list of sub-glyphs into a different array    */
    /* but this will prevent us from using the auto-hinter at its best   */
    /* quality.                                                          */
    /*                                                                   */
    org_count = glyph->num_subs;

    if ( org_count + count > glyph->max_subs )
    {
      FT_UInt  new_max = ( org_count + count + 3 ) & (FT_UInt)-4;


      /* we arbitrarily limit the number of subglyphs */
      /* to avoid endless recursion                   */
      if ( new_max > 64 )
      {
        error = FT_THROW( Invalid_Table );
        FT_ERROR(( "pfr_glyph_load_compound:"
                   " too many compound glyphs components\n" ));
        goto Exit;
      }

      if ( FT_RENEW_ARRAY( glyph->subs, glyph->max_subs, new_max ) )
        goto Exit;

      glyph->max_subs = new_max;
    }

    subglyph = glyph->subs + org_count;

    for ( i = 0; i < count; i++, subglyph++ )
    {
      FT_UInt  format;


      x_pos = 0;
      y_pos = 0;

      PFR_CHECK( 1 );
      format = PFR_NEXT_BYTE( p );

      /* read scale when available */
      subglyph->x_scale = 0x10000L;
      if ( format & PFR_SUBGLYPH_XSCALE )
      {
        PFR_CHECK( 2 );
        subglyph->x_scale = PFR_NEXT_SHORT( p ) << 4;
      }

      subglyph->y_scale = 0x10000L;
      if ( format & PFR_SUBGLYPH_YSCALE )
      {
        PFR_CHECK( 2 );
        subglyph->y_scale = PFR_NEXT_SHORT( p ) << 4;
      }

      /* read offset */
      switch ( format & 3 )
      {
      case 1:
        PFR_CHECK( 2 );
        x_pos = PFR_NEXT_SHORT( p );
        break;

      case 2:
        PFR_CHECK( 1 );
        x_pos += PFR_NEXT_INT8( p );
        break;

      default:
        ;
      }

      switch ( ( format >> 2 ) & 3 )
      {
      case 1:
        PFR_CHECK( 2 );
        y_pos = PFR_NEXT_SHORT( p );
        break;

      case 2:
        PFR_CHECK( 1 );
        y_pos += PFR_NEXT_INT8( p );
        break;

      default:
        ;
      }

      subglyph->x_delta = x_pos;
      subglyph->y_delta = y_pos;

      /* read glyph position and size now */
      if ( format & PFR_SUBGLYPH_2BYTE_SIZE )
      {
        PFR_CHECK( 2 );
        subglyph->gps_size = PFR_NEXT_USHORT( p );
      }
      else
      {
        PFR_CHECK( 1 );
        subglyph->gps_size = PFR_NEXT_BYTE( p );
      }

      if ( format & PFR_SUBGLYPH_3BYTE_OFFSET )
      {
        PFR_CHECK( 3 );
        subglyph->gps_offset = PFR_NEXT_LONG( p );
      }
      else
      {
        PFR_CHECK( 2 );
        subglyph->gps_offset = PFR_NEXT_USHORT( p );
      }

      glyph->num_subs++;
    }

  Exit:
    return error;

  Failure:
  Too_Short:
    error = FT_THROW( Invalid_Table );
    FT_ERROR(( "pfr_glyph_load_compound: invalid glyph data\n" ));
    goto Exit;
  }


  static FT_Error
  pfr_glyph_load_rec( PFR_Glyph  glyph,
                      FT_Stream  stream,
                      FT_ULong   gps_offset,
                      FT_ULong   offset,
                      FT_ULong   size )
  {
    FT_Error  error;
    FT_Byte*  p;
    FT_Byte*  limit;


    if ( FT_STREAM_SEEK( gps_offset + offset ) ||
         FT_FRAME_ENTER( size )                )
      goto Exit;

    p     = (FT_Byte*)stream->cursor;
    limit = p + size;

    if ( size > 0 && *p & PFR_GLYPH_IS_COMPOUND )
    {
      FT_Int          n, old_count, count;
      FT_GlyphLoader  loader = glyph->loader;
      FT_Outline*     base   = &loader->base.outline;


      old_count = glyph->num_subs;

      /* this is a compound glyph - load it */
      error = pfr_glyph_load_compound( glyph, p, limit );

      FT_FRAME_EXIT();

      if ( error )
        goto Exit;

      count = glyph->num_subs - old_count;

      FT_TRACE4(( "compound glyph with %d elements (offset %lu):\n",
                  count, offset ));

      /* now, load each individual glyph */
      for ( n = 0; n < count; n++ )
      {
        FT_Int        i, old_points, num_points;
        PFR_SubGlyph  subglyph;


        FT_TRACE4(( "subglyph %d:\n", n ));

        subglyph   = glyph->subs + old_count + n;
        old_points = base->n_points;

        error = pfr_glyph_load_rec( glyph, stream, gps_offset,
                                    subglyph->gps_offset,
                                    subglyph->gps_size );
        if ( error )
          break;

        /* note that `glyph->subs' might have been re-allocated */
        subglyph   = glyph->subs + old_count + n;
        num_points = base->n_points - old_points;

        /* translate and eventually scale the new glyph points */
        if ( subglyph->x_scale != 0x10000L || subglyph->y_scale != 0x10000L )
        {
          FT_Vector*  vec = base->points + old_points;


          for ( i = 0; i < num_points; i++, vec++ )
          {
            vec->x = FT_MulFix( vec->x, subglyph->x_scale ) +
                       subglyph->x_delta;
            vec->y = FT_MulFix( vec->y, subglyph->y_scale ) +
                       subglyph->y_delta;
          }
        }
        else
        {
          FT_Vector*  vec = loader->base.outline.points + old_points;


          for ( i = 0; i < num_points; i++, vec++ )
          {
            vec->x += subglyph->x_delta;
            vec->y += subglyph->y_delta;
          }
        }

        /* proceed to next sub-glyph */
      }

      FT_TRACE4(( "end compound glyph with %d elements\n", count ));
    }
    else
    {
      FT_TRACE4(( "simple glyph (offset %lu)\n", offset ));

      /* load a simple glyph */
      error = pfr_glyph_load_simple( glyph, p, limit );

      FT_FRAME_EXIT();
    }

  Exit:
    return error;
  }


  FT_LOCAL_DEF( FT_Error )
  pfr_glyph_load( PFR_Glyph  glyph,
                  FT_Stream  stream,
                  FT_ULong   gps_offset,
                  FT_ULong   offset,
                  FT_ULong   size )
  {
    /* initialize glyph loader */
    FT_GlyphLoader_Rewind( glyph->loader );

    glyph->num_subs = 0;

    /* load the glyph, recursively when needed */
    return pfr_glyph_load_rec( glyph, stream, gps_offset, offset, size );
  }


/* END */