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/src/freetype/src/type1/t1objs.c

https://bitbucket.org/cabalistic/ogredeps/
C | 615 lines | 350 code | 135 blank | 130 comment | 53 complexity | faa51e64ebd85f2d73bdbbd2531bf245 MD5 | raw file
  1/***************************************************************************/
  2/*                                                                         */
  3/*  t1objs.c                                                               */
  4/*                                                                         */
  5/*    Type 1 objects manager (body).                                       */
  6/*                                                                         */
  7/*  Copyright 1996-2009, 2011 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
 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 FT_SERVICE_POSTSCRIPT_CMAPS_H
 35#include FT_INTERNAL_POSTSCRIPT_AUX_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  trace_t1objs
 46
 47
 48  /*************************************************************************/
 49  /*                                                                       */
 50  /*                            SIZE FUNCTIONS                             */
 51  /*                                                                       */
 52  /*  note that we store the global hints in the size's "internal" root    */
 53  /*  field                                                                */
 54  /*                                                                       */
 55  /*************************************************************************/
 56
 57
 58  static PSH_Globals_Funcs
 59  T1_Size_Get_Globals_Funcs( T1_Size  size )
 60  {
 61    T1_Face           face     = (T1_Face)size->root.face;
 62    PSHinter_Service  pshinter = (PSHinter_Service)face->pshinter;
 63    FT_Module         module;
 64
 65
 66    module = FT_Get_Module( size->root.face->driver->root.library,
 67                            "pshinter" );
 68    return ( module && pshinter && pshinter->get_globals_funcs )
 69           ? pshinter->get_globals_funcs( module )
 70           : 0 ;
 71  }
 72
 73
 74  FT_LOCAL_DEF( void )
 75  T1_Size_Done( FT_Size  t1size )          /* T1_Size */
 76  {
 77    T1_Size  size = (T1_Size)t1size;
 78
 79
 80    if ( size->root.internal )
 81    {
 82      PSH_Globals_Funcs  funcs;
 83
 84
 85      funcs = T1_Size_Get_Globals_Funcs( size );
 86      if ( funcs )
 87        funcs->destroy( (PSH_Globals)size->root.internal );
 88
 89      size->root.internal = 0;
 90    }
 91  }
 92
 93
 94  FT_LOCAL_DEF( FT_Error )
 95  T1_Size_Init( FT_Size  t1size )      /* T1_Size */
 96  {
 97    T1_Size            size  = (T1_Size)t1size;
 98    FT_Error           error = T1_Err_Ok;
 99    PSH_Globals_Funcs  funcs = T1_Size_Get_Globals_Funcs( size );
100
101
102    if ( funcs )
103    {
104      PSH_Globals  globals;
105      T1_Face      face = (T1_Face)size->root.face;
106
107
108      error = funcs->create( size->root.face->memory,
109                             &face->type1.private_dict, &globals );
110      if ( !error )
111        size->root.internal = (FT_Size_Internal)(void*)globals;
112    }
113
114    return error;
115  }
116
117
118  FT_LOCAL_DEF( FT_Error )
119  T1_Size_Request( FT_Size          t1size,     /* T1_Size */
120                   FT_Size_Request  req )
121  {
122    T1_Size            size  = (T1_Size)t1size;
123    PSH_Globals_Funcs  funcs = T1_Size_Get_Globals_Funcs( size );
124
125
126    FT_Request_Metrics( size->root.face, req );
127
128    if ( funcs )
129      funcs->set_scale( (PSH_Globals)size->root.internal,
130                        size->root.metrics.x_scale,
131                        size->root.metrics.y_scale,
132                        0, 0 );
133
134    return T1_Err_Ok;
135  }
136
137
138  /*************************************************************************/
139  /*                                                                       */
140  /*                            SLOT  FUNCTIONS                            */
141  /*                                                                       */
142  /*************************************************************************/
143
144  FT_LOCAL_DEF( void )
145  T1_GlyphSlot_Done( FT_GlyphSlot  slot )
146  {
147    slot->internal->glyph_hints = 0;
148  }
149
150
151  FT_LOCAL_DEF( FT_Error )
152  T1_GlyphSlot_Init( FT_GlyphSlot  slot )
153  {
154    T1_Face           face;
155    PSHinter_Service  pshinter;
156
157
158    face     = (T1_Face)slot->face;
159    pshinter = (PSHinter_Service)face->pshinter;
160
161    if ( pshinter )
162    {
163      FT_Module  module;
164
165
166      module = FT_Get_Module( slot->face->driver->root.library,
167                              "pshinter" );
168      if ( module )
169      {
170        T1_Hints_Funcs  funcs;
171
172
173        funcs = pshinter->get_t1_funcs( module );
174        slot->internal->glyph_hints = (void*)funcs;
175      }
176    }
177
178    return 0;
179  }
180
181
182  /*************************************************************************/
183  /*                                                                       */
184  /*                            FACE  FUNCTIONS                            */
185  /*                                                                       */
186  /*************************************************************************/
187
188
189  /*************************************************************************/
190  /*                                                                       */
191  /* <Function>                                                            */
192  /*    T1_Face_Done                                                       */
193  /*                                                                       */
194  /* <Description>                                                         */
195  /*    The face object destructor.                                        */
196  /*                                                                       */
197  /* <Input>                                                               */
198  /*    face :: A typeless pointer to the face object to destroy.          */
199  /*                                                                       */
200  FT_LOCAL_DEF( void )
201  T1_Face_Done( FT_Face  t1face )         /* T1_Face */
202  {
203    T1_Face    face = (T1_Face)t1face;
204    FT_Memory  memory;
205    T1_Font    type1;
206
207
208    if ( !face )
209      return;
210
211    memory = face->root.memory;
212    type1  = &face->type1;
213
214#ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
215    /* release multiple masters information */
216    FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) );
217
218    if ( face->buildchar )
219    {
220      FT_FREE( face->buildchar );
221
222      face->buildchar     = NULL;
223      face->len_buildchar = 0;
224    }
225
226    T1_Done_Blend( face );
227    face->blend = 0;
228#endif
229
230    /* release font info strings */
231    {
232      PS_FontInfo  info = &type1->font_info;
233
234
235      FT_FREE( info->version );
236      FT_FREE( info->notice );
237      FT_FREE( info->full_name );
238      FT_FREE( info->family_name );
239      FT_FREE( info->weight );
240    }
241
242    /* release top dictionary */
243    FT_FREE( type1->charstrings_len );
244    FT_FREE( type1->charstrings );
245    FT_FREE( type1->glyph_names );
246
247    FT_FREE( type1->subrs );
248    FT_FREE( type1->subrs_len );
249
250    FT_FREE( type1->subrs_block );
251    FT_FREE( type1->charstrings_block );
252    FT_FREE( type1->glyph_names_block );
253
254    FT_FREE( type1->encoding.char_index );
255    FT_FREE( type1->encoding.char_name );
256    FT_FREE( type1->font_name );
257
258#ifndef T1_CONFIG_OPTION_NO_AFM
259    /* release afm data if present */
260    if ( face->afm_data )
261      T1_Done_Metrics( memory, (AFM_FontInfo)face->afm_data );
262#endif
263
264    /* release unicode map, if any */
265#if 0
266    FT_FREE( face->unicode_map_rec.maps );
267    face->unicode_map_rec.num_maps = 0;
268    face->unicode_map              = NULL;
269#endif
270
271    face->root.family_name = NULL;
272    face->root.style_name  = NULL;
273  }
274
275
276  /*************************************************************************/
277  /*                                                                       */
278  /* <Function>                                                            */
279  /*    T1_Face_Init                                                       */
280  /*                                                                       */
281  /* <Description>                                                         */
282  /*    The face object constructor.                                       */
283  /*                                                                       */
284  /* <Input>                                                               */
285  /*    stream     ::  input stream where to load font data.               */
286  /*                                                                       */
287  /*    face_index :: The index of the font face in the resource.          */
288  /*                                                                       */
289  /*    num_params :: Number of additional generic parameters.  Ignored.   */
290  /*                                                                       */
291  /*    params     :: Additional generic parameters.  Ignored.             */
292  /*                                                                       */
293  /* <InOut>                                                               */
294  /*    face       :: The face record to build.                            */
295  /*                                                                       */
296  /* <Return>                                                              */
297  /*    FreeType error code.  0 means success.                             */
298  /*                                                                       */
299  FT_LOCAL_DEF( FT_Error )
300  T1_Face_Init( FT_Stream      stream,
301                FT_Face        t1face,          /* T1_Face */
302                FT_Int         face_index,
303                FT_Int         num_params,
304                FT_Parameter*  params )
305  {
306    T1_Face             face = (T1_Face)t1face;
307    FT_Error            error;
308    FT_Service_PsCMaps  psnames;
309    PSAux_Service       psaux;
310    T1_Font             type1 = &face->type1;
311    PS_FontInfo         info = &type1->font_info;
312
313    FT_UNUSED( num_params );
314    FT_UNUSED( params );
315    FT_UNUSED( stream );
316
317
318    face->root.num_faces = 1;
319
320    FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
321    face->psnames = psnames;
322
323    face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
324                                           "psaux" );
325    psaux = (PSAux_Service)face->psaux;
326    if ( !psaux )
327    {
328      FT_ERROR(( "T1_Face_Init: cannot access `psaux' module\n" ));
329      error = T1_Err_Missing_Module;
330      goto Exit;
331    }
332
333    face->pshinter = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
334                                              "pshinter" );
335
336    FT_TRACE2(( "Type 1 driver\n" ));
337
338    /* open the tokenizer; this will also check the font format */
339    error = T1_Open_Face( face );
340    if ( error )
341      goto Exit;
342
343    /* if we just wanted to check the format, leave successfully now */
344    if ( face_index < 0 )
345      goto Exit;
346
347    /* check the face index */
348    if ( face_index > 0 )
349    {
350      FT_ERROR(( "T1_Face_Init: invalid face index\n" ));
351      error = T1_Err_Invalid_Argument;
352      goto Exit;
353    }
354
355    /* now load the font program into the face object */
356
357    /* initialize the face object fields */
358
359    /* set up root face fields */
360    {
361      FT_Face  root = (FT_Face)&face->root;
362
363
364      root->num_glyphs = type1->num_glyphs;
365      root->face_index = 0;
366
367      root->face_flags = FT_FACE_FLAG_SCALABLE    |
368                         FT_FACE_FLAG_HORIZONTAL  |
369                         FT_FACE_FLAG_GLYPH_NAMES |
370                         FT_FACE_FLAG_HINTER;
371
372      if ( info->is_fixed_pitch )
373        root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
374
375      if ( face->blend )
376        root->face_flags |= FT_FACE_FLAG_MULTIPLE_MASTERS;
377
378      /* XXX: TODO -- add kerning with .afm support */
379
380
381      /* The following code to extract the family and the style is very   */
382      /* simplistic and might get some things wrong.  For a full-featured */
383      /* algorithm you might have a look at the whitepaper given at       */
384      /*                                                                  */
385      /*   http://blogs.msdn.com/text/archive/2007/04/23/wpf-font-selection-model.aspx */
386
387      /* get style name -- be careful, some broken fonts only */
388      /* have a `/FontName' dictionary entry!                 */
389      root->family_name = info->family_name;
390      root->style_name  = NULL;
391
392      if ( root->family_name )
393      {
394        char*  full   = info->full_name;
395        char*  family = root->family_name;
396
397
398        if ( full )
399        {
400          FT_Bool  the_same = TRUE;
401
402
403          while ( *full )
404          {
405            if ( *full == *family )
406            {
407              family++;
408              full++;
409            }
410            else
411            {
412              if ( *full == ' ' || *full == '-' )
413                full++;
414              else if ( *family == ' ' || *family == '-' )
415                family++;
416              else
417              {
418                the_same = FALSE;
419
420                if ( !*family )
421                  root->style_name = full;
422                break;
423              }
424            }
425          }
426
427          if ( the_same )
428            root->style_name = (char *)"Regular";
429        }
430      }
431      else
432      {
433        /* do we have a `/FontName'? */
434        if ( type1->font_name )
435          root->family_name = type1->font_name;
436      }
437
438      if ( !root->style_name )
439      {
440        if ( info->weight )
441          root->style_name = info->weight;
442        else
443          /* assume `Regular' style because we don't know better */
444          root->style_name = (char *)"Regular";
445      }
446
447      /* compute style flags */
448      root->style_flags = 0;
449      if ( info->italic_angle )
450        root->style_flags |= FT_STYLE_FLAG_ITALIC;
451      if ( info->weight )
452      {
453        if ( !ft_strcmp( info->weight, "Bold"  ) ||
454             !ft_strcmp( info->weight, "Black" ) )
455          root->style_flags |= FT_STYLE_FLAG_BOLD;
456      }
457
458      /* no embedded bitmap support */
459      root->num_fixed_sizes = 0;
460      root->available_sizes = 0;
461
462      root->bbox.xMin =   type1->font_bbox.xMin            >> 16;
463      root->bbox.yMin =   type1->font_bbox.yMin            >> 16;
464      /* no `U' suffix here to 0xFFFF! */
465      root->bbox.xMax = ( type1->font_bbox.xMax + 0xFFFF ) >> 16;
466      root->bbox.yMax = ( type1->font_bbox.yMax + 0xFFFF ) >> 16;
467
468      /* Set units_per_EM if we didn't set it in t1_parse_font_matrix. */
469      if ( !root->units_per_EM )
470        root->units_per_EM = 1000;
471
472      root->ascender  = (FT_Short)( root->bbox.yMax );
473      root->descender = (FT_Short)( root->bbox.yMin );
474
475      root->height = (FT_Short)( ( root->units_per_EM * 12 ) / 10 );
476      if ( root->height < root->ascender - root->descender )
477        root->height = (FT_Short)( root->ascender - root->descender );
478
479      /* now compute the maximum advance width */
480      root->max_advance_width =
481        (FT_Short)( root->bbox.xMax );
482      {
483        FT_Pos  max_advance;
484
485
486        error = T1_Compute_Max_Advance( face, &max_advance );
487
488        /* in case of error, keep the standard width */
489        if ( !error )
490          root->max_advance_width = (FT_Short)FIXED_TO_INT( max_advance );
491        else
492          error = T1_Err_Ok;   /* clear error */
493      }
494
495      root->max_advance_height = root->height;
496
497      root->underline_position  = (FT_Short)info->underline_position;
498      root->underline_thickness = (FT_Short)info->underline_thickness;
499    }
500
501    {
502      FT_Face  root = &face->root;
503
504
505      if ( psnames )
506      {
507        FT_CharMapRec    charmap;
508        T1_CMap_Classes  cmap_classes = psaux->t1_cmap_classes;
509        FT_CMap_Class    clazz;
510
511
512        charmap.face = root;
513
514        /* first of all, try to synthesize a Unicode charmap */
515        charmap.platform_id = TT_PLATFORM_MICROSOFT;
516        charmap.encoding_id = TT_MS_ID_UNICODE_CS;
517        charmap.encoding    = FT_ENCODING_UNICODE;
518
519        error = FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL );
520        if ( error && FT_Err_No_Unicode_Glyph_Name != error )
521          goto Exit;
522        error = FT_Err_Ok;
523
524        /* now, generate an Adobe Standard encoding when appropriate */
525        charmap.platform_id = TT_PLATFORM_ADOBE;
526        clazz               = NULL;
527
528        switch ( type1->encoding_type )
529        {
530        case T1_ENCODING_TYPE_STANDARD:
531          charmap.encoding    = FT_ENCODING_ADOBE_STANDARD;
532          charmap.encoding_id = TT_ADOBE_ID_STANDARD;
533          clazz               = cmap_classes->standard;
534          break;
535
536        case T1_ENCODING_TYPE_EXPERT:
537          charmap.encoding    = FT_ENCODING_ADOBE_EXPERT;
538          charmap.encoding_id = TT_ADOBE_ID_EXPERT;
539          clazz               = cmap_classes->expert;
540          break;
541
542        case T1_ENCODING_TYPE_ARRAY:
543          charmap.encoding    = FT_ENCODING_ADOBE_CUSTOM;
544          charmap.encoding_id = TT_ADOBE_ID_CUSTOM;
545          clazz               = cmap_classes->custom;
546          break;
547
548        case T1_ENCODING_TYPE_ISOLATIN1:
549          charmap.encoding    = FT_ENCODING_ADOBE_LATIN_1;
550          charmap.encoding_id = TT_ADOBE_ID_LATIN_1;
551          clazz               = cmap_classes->unicode;
552          break;
553
554        default:
555          ;
556        }
557
558        if ( clazz )
559          error = FT_CMap_New( clazz, NULL, &charmap, NULL );
560
561#if 0
562        /* Select default charmap */
563        if (root->num_charmaps)
564          root->charmap = root->charmaps[0];
565#endif
566      }
567    }
568
569  Exit:
570    return error;
571  }
572
573
574  /*************************************************************************/
575  /*                                                                       */
576  /* <Function>                                                            */
577  /*    T1_Driver_Init                                                     */
578  /*                                                                       */
579  /* <Description>                                                         */
580  /*    Initializes a given Type 1 driver object.                          */
581  /*                                                                       */
582  /* <Input>                                                               */
583  /*    driver :: A handle to the target driver object.                    */
584  /*                                                                       */
585  /* <Return>                                                              */
586  /*    FreeType error code.  0 means success.                             */
587  /*                                                                       */
588  FT_LOCAL_DEF( FT_Error )
589  T1_Driver_Init( FT_Module  driver )
590  {
591    FT_UNUSED( driver );
592
593    return T1_Err_Ok;
594  }
595
596
597  /*************************************************************************/
598  /*                                                                       */
599  /* <Function>                                                            */
600  /*    T1_Driver_Done                                                     */
601  /*                                                                       */
602  /* <Description>                                                         */
603  /*    Finalizes a given Type 1 driver.                                   */
604  /*                                                                       */
605  /* <Input>                                                               */
606  /*    driver :: A handle to the target Type 1 driver.                    */
607  /*                                                                       */
608  FT_LOCAL_DEF( void )
609  T1_Driver_Done( FT_Module  driver )
610  {
611    FT_UNUSED( driver );
612  }
613
614
615/* END */