reactos/lib/3rdparty/freetype/src/type42/t42objs.c

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  t42objs.c                                                              */
   4 /*                                                                         */
   5 /*    Type 42 objects manager (body).                                      */
   6 /*                                                                         */
   7 /*  Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009               */
   8 /*  by Roberto Alameda.                                                    */
   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 "t42objs.h"
  20 #include "t42parse.h"
  21 #include "t42error.h"
  22 #include FT_INTERNAL_DEBUG_H
  23 #include FT_LIST_H
  24 #include FT_TRUETYPE_IDS_H
  25
  26
  27 #undef  FT_COMPONENT
  28 #define FT_COMPONENT  trace_t42
  29
  30
  31   static FT_Error
  32   T42_Open_Face( T42_Face  face )
  33   {
  34     T42_LoaderRec  loader;
  35     T42_Parser     parser;
  36     T1_Font        type1 = &face->type1;
  37     FT_Memory      memory = face->root.memory;
  38     FT_Error       error;
  39
  40     PSAux_Service  psaux  = (PSAux_Service)face->psaux;
  41
  42
  43     t42_loader_init( &loader, face );
  44
  45     parser = &loader.parser;
  46
  47     if ( FT_ALLOC( face->ttf_data, 12 ) )
  48       goto Exit;
  49
  50     error = t42_parser_init( parser,
  51                              face->root.stream,
  52                              memory,
  53                              psaux);
  54     if ( error )
  55       goto Exit;
  56
  57     error = t42_parse_dict( face, &loader,
  58                             parser->base_dict, parser->base_len );
  59     if ( error )
  60       goto Exit;
  61
  62     if ( type1->font_type != 42 )
  63     {
  64       error = T42_Err_Unknown_File_Format;
  65       goto Exit;
  66     }
  67
  68     /* now, propagate the charstrings and glyphnames tables */
  69     /* to the Type1 data                                    */
  70     type1->num_glyphs = loader.num_glyphs;
  71
  72     if ( !loader.charstrings.init )
  73     {
  74       FT_ERROR(( "T42_Open_Face: no charstrings array in face\n" ));
  75       error = T42_Err_Invalid_File_Format;
  76     }
  77
  78     loader.charstrings.init  = 0;
  79     type1->charstrings_block = loader.charstrings.block;
  80     type1->charstrings       = loader.charstrings.elements;
  81     type1->charstrings_len   = loader.charstrings.lengths;
  82
  83     /* we copy the glyph names `block' and `elements' fields; */
  84     /* the `lengths' field must be released later             */
  85     type1->glyph_names_block    = loader.glyph_names.block;
  86     type1->glyph_names          = (FT_String**)loader.glyph_names.elements;
  87     loader.glyph_names.block    = 0;
  88     loader.glyph_names.elements = 0;
  89
  90     /* we must now build type1.encoding when we have a custom array */
  91     if ( type1->encoding_type == T1_ENCODING_TYPE_ARRAY )
  92     {
  93       FT_Int    charcode, idx, min_char, max_char;
  94       FT_Byte*  char_name;
  95       FT_Byte*  glyph_name;
  96
  97
  98       /* OK, we do the following: for each element in the encoding   */
  99       /* table, look up the index of the glyph having the same name  */
 100       /* as defined in the CharStrings array.                        */
 101       /* The index is then stored in type1.encoding.char_index, and  */
 102       /* the name in type1.encoding.char_name                        */
 103
 104       min_char = 0;
 105       max_char = 0;
 106
 107       charcode = 0;
 108       for ( ; charcode < loader.encoding_table.max_elems; charcode++ )
 109       {
 110         type1->encoding.char_index[charcode] = 0;
 111         type1->encoding.char_name [charcode] = (char *)".notdef";
 112
 113         char_name = loader.encoding_table.elements[charcode];
 114         if ( char_name )
 115           for ( idx = 0; idx < type1->num_glyphs; idx++ )
 116           {
 117             glyph_name = (FT_Byte*)type1->glyph_names[idx];
 118             if ( ft_strcmp( (const char*)char_name,
 119                             (const char*)glyph_name ) == 0 )
 120             {
 121               type1->encoding.char_index[charcode] = (FT_UShort)idx;
 122               type1->encoding.char_name [charcode] = (char*)glyph_name;
 123
 124               /* Change min/max encoded char only if glyph name is */
 125               /* not /.notdef                                      */
 126               if ( ft_strcmp( (const char*)".notdef",
 127                               (const char*)glyph_name ) != 0 )
 128               {
 129                 if ( charcode < min_char )
 130                   min_char = charcode;
 131                 if ( charcode >= max_char )
 132                   max_char = charcode + 1;
 133               }
 134               break;
 135             }
 136           }
 137       }
 138
 139       type1->encoding.code_first = min_char;
 140       type1->encoding.code_last  = max_char;
 141       type1->encoding.num_chars  = loader.num_chars;
 142     }
 143
 144   Exit:
 145     t42_loader_done( &loader );
 146     return error;
 147   }
 148
 149
 150   /***************** Driver Functions *************/
 151
 152
 153   FT_LOCAL_DEF( FT_Error )
 154   T42_Face_Init( FT_Stream      stream,
 155                  T42_Face       face,
 156                  FT_Int         face_index,
 157                  FT_Int         num_params,
 158                  FT_Parameter*  params )
 159   {
 160     FT_Error            error;
 161     FT_Service_PsCMaps  psnames;
 162     PSAux_Service       psaux;
 163     FT_Face             root  = (FT_Face)&face->root;
 164     T1_Font             type1 = &face->type1;
 165     PS_FontInfo         info  = &type1->font_info;
 166
 167     FT_UNUSED( num_params );
 168     FT_UNUSED( params );
 169     FT_UNUSED( face_index );
 170     FT_UNUSED( stream );
 171
 172
 173     face->ttf_face       = NULL;
 174     face->root.num_faces = 1;
 175
 176     FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
 177     face->psnames = psnames;
 178
 179     face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
 180                                            "psaux" );
 181     psaux = (PSAux_Service)face->psaux;
 182
 183     /* open the tokenizer, this will also check the font format */
 184     error = T42_Open_Face( face );
 185     if ( error )
 186       goto Exit;
 187
 188     /* if we just wanted to check the format, leave successfully now */
 189     if ( face_index < 0 )
 190       goto Exit;
 191
 192     /* check the face index */
 193     if ( face_index > 0 )
 194     {
 195       FT_ERROR(( "T42_Face_Init: invalid face index\n" ));
 196       error = T42_Err_Invalid_Argument;
 197       goto Exit;
 198     }
 199
 200     /* Now load the font program into the face object */
 201
 202     /* Init the face object fields */
 203     /* Now set up root face fields */
 204
 205     root->num_glyphs   = type1->num_glyphs;
 206     root->num_charmaps = 0;
 207     root->face_index   = 0;
 208
 209     root->face_flags = FT_FACE_FLAG_SCALABLE    |
 210                        FT_FACE_FLAG_HORIZONTAL  |
 211                        FT_FACE_FLAG_GLYPH_NAMES;
 212
 213     if ( info->is_fixed_pitch )
 214       root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
 215
 216     /* We only set this flag if we have the patented bytecode interpreter. */
 217     /* There are no known `tricky' Type42 fonts that could be loaded with  */
 218     /* the unpatented interpreter.                                         */
 219 #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
 220     root->face_flags |= FT_FACE_FLAG_HINTER;
 221 #endif
 222
 223     /* XXX: TODO -- add kerning with .afm support */
 224
 225     /* get style name -- be careful, some broken fonts only */
 226     /* have a `/FontName' dictionary entry!                 */
 227     root->family_name = info->family_name;
 228     /* assume "Regular" style if we don't know better */
 229     root->style_name = (char *)"Regular";
 230     if ( root->family_name )
 231     {
 232       char*  full   = info->full_name;
 233       char*  family = root->family_name;
 234
 235
 236       if ( full )
 237       {
 238         while ( *full )
 239         {
 240           if ( *full == *family )
 241           {
 242             family++;
 243             full++;
 244           }
 245           else
 246           {
 247             if ( *full == ' ' || *full == '-' )
 248               full++;
 249             else if ( *family == ' ' || *family == '-' )
 250               family++;
 251             else
 252             {
 253               if ( !*family )
 254                 root->style_name = full;
 255               break;
 256             }
 257           }
 258         }
 259       }
 260     }
 261     else
 262     {
 263       /* do we have a `/FontName'? */
 264       if ( type1->font_name )
 265         root->family_name = type1->font_name;
 266     }
 267
 268     /* no embedded bitmap support */
 269     root->num_fixed_sizes = 0;
 270     root->available_sizes = 0;
 271
 272     /* Load the TTF font embedded in the T42 font */
 273     {
 274       FT_Open_Args  args;
 275
 276
 277       args.flags       = FT_OPEN_MEMORY;
 278       args.memory_base = face->ttf_data;
 279       args.memory_size = face->ttf_size;
 280
 281       if ( num_params )
 282       {
 283         args.flags     |= FT_OPEN_PARAMS;
 284         args.num_params = num_params;
 285         args.params     = params;
 286       }
 287
 288       error = FT_Open_Face( FT_FACE_LIBRARY( face ),
 289                             &args, 0, &face->ttf_face );
 290     }
 291
 292     if ( error )
 293       goto Exit;
 294
 295     FT_Done_Size( face->ttf_face->size );
 296
 297     /* Ignore info in FontInfo dictionary and use the info from the  */
 298     /* loaded TTF font.  The PostScript interpreter also ignores it. */
 299     root->bbox         = face->ttf_face->bbox;
 300     root->units_per_EM = face->ttf_face->units_per_EM;
 301
 302     root->ascender  = face->ttf_face->ascender;
 303     root->descender = face->ttf_face->descender;
 304     root->height    = face->ttf_face->height;
 305
 306     root->max_advance_width  = face->ttf_face->max_advance_width;
 307     root->max_advance_height = face->ttf_face->max_advance_height;
 308
 309     root->underline_position  = (FT_Short)info->underline_position;
 310     root->underline_thickness = (FT_Short)info->underline_thickness;
 311
 312     /* compute style flags */
 313     root->style_flags = 0;
 314     if ( info->italic_angle )
 315       root->style_flags |= FT_STYLE_FLAG_ITALIC;
 316
 317     if ( face->ttf_face->style_flags & FT_STYLE_FLAG_BOLD )
 318       root->style_flags |= FT_STYLE_FLAG_BOLD;
 319
 320     if ( face->ttf_face->face_flags & FT_FACE_FLAG_VERTICAL )
 321       root->face_flags |= FT_FACE_FLAG_VERTICAL;
 322
 323     {
 324       if ( psnames && psaux )
 325       {
 326         FT_CharMapRec    charmap;
 327         T1_CMap_Classes  cmap_classes = psaux->t1_cmap_classes;
 328         FT_CMap_Class    clazz;
 329
 330
 331         charmap.face = root;
 332
 333         /* first of all, try to synthesize a Unicode charmap */
 334         charmap.platform_id = TT_PLATFORM_MICROSOFT;
 335         charmap.encoding_id = TT_MS_ID_UNICODE_CS;
 336         charmap.encoding    = FT_ENCODING_UNICODE;
 337
 338         error = FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL );
 339         if ( error && FT_Err_No_Unicode_Glyph_Name != error )
 340           goto Exit;
 341         error = FT_Err_Ok;
 342
 343         /* now, generate an Adobe Standard encoding when appropriate */
 344         charmap.platform_id = TT_PLATFORM_ADOBE;
 345         clazz               = NULL;
 346
 347         switch ( type1->encoding_type )
 348         {
 349         case T1_ENCODING_TYPE_STANDARD:
 350           charmap.encoding    = FT_ENCODING_ADOBE_STANDARD;
 351           charmap.encoding_id = TT_ADOBE_ID_STANDARD;
 352           clazz               = cmap_classes->standard;
 353           break;
 354
 355         case T1_ENCODING_TYPE_EXPERT:
 356           charmap.encoding    = FT_ENCODING_ADOBE_EXPERT;
 357           charmap.encoding_id = TT_ADOBE_ID_EXPERT;
 358           clazz               = cmap_classes->expert;
 359           break;
 360
 361         case T1_ENCODING_TYPE_ARRAY:
 362           charmap.encoding    = FT_ENCODING_ADOBE_CUSTOM;
 363           charmap.encoding_id = TT_ADOBE_ID_CUSTOM;
 364           clazz               = cmap_classes->custom;
 365           break;
 366
 367         case T1_ENCODING_TYPE_ISOLATIN1:
 368           charmap.encoding    = FT_ENCODING_ADOBE_LATIN_1;
 369           charmap.encoding_id = TT_ADOBE_ID_LATIN_1;
 370           clazz               = cmap_classes->unicode;
 371           break;
 372
 373         default:
 374           ;
 375         }
 376
 377         if ( clazz )
 378           error = FT_CMap_New( clazz, NULL, &charmap, NULL );
 379
 380 #if 0
 381         /* Select default charmap */
 382         if ( root->num_charmaps )
 383           root->charmap = root->charmaps[0];
 384 #endif
 385       }
 386     }
 387   Exit:
 388     return error;
 389   }
 390
 391
 392   FT_LOCAL_DEF( void )
 393   T42_Face_Done( T42_Face  face )
 394   {
 395     T1_Font      type1;
 396     PS_FontInfo  info;
 397     FT_Memory    memory;
 398
 399
 400     if ( !face )
 401       return;
 402
 403     type1  = &face->type1;
 404     info   = &type1->font_info;
 405     memory = face->root.memory;
 406
 407     /* delete internal ttf face prior to freeing face->ttf_data */
 408     if ( face->ttf_face )
 409       FT_Done_Face( face->ttf_face );
 410
 411     /* release font info strings */
 412     FT_FREE( info->version );
 413     FT_FREE( info->notice );
 414     FT_FREE( info->full_name );
 415     FT_FREE( info->family_name );
 416     FT_FREE( info->weight );
 417
 418     /* release top dictionary */
 419     FT_FREE( type1->charstrings_len );
 420     FT_FREE( type1->charstrings );
 421     FT_FREE( type1->glyph_names );
 422
 423     FT_FREE( type1->charstrings_block );
 424     FT_FREE( type1->glyph_names_block );
 425
 426     FT_FREE( type1->encoding.char_index );
 427     FT_FREE( type1->encoding.char_name );
 428     FT_FREE( type1->font_name );
 429
 430     FT_FREE( face->ttf_data );
 431
 432 #if 0
 433     /* release afm data if present */
 434     if ( face->afm_data )
 435       T1_Done_AFM( memory, (T1_AFM*)face->afm_data );
 436 #endif
 437
 438     /* release unicode map, if any */
 439     FT_FREE( face->unicode_map.maps );
 440     face->unicode_map.num_maps = 0;
 441
 442     face->root.family_name = 0;
 443     face->root.style_name  = 0;
 444   }
 445
 446
 447   /*************************************************************************/
 448   /*                                                                       */
 449   /* <Function>                                                            */
 450   /*    T42_Driver_Init                                                    */
 451   /*                                                                       */
 452   /* <Description>                                                         */
 453   /*    Initializes a given Type 42 driver object.                         */
 454   /*                                                                       */
 455   /* <Input>                                                               */
 456   /*    driver :: A handle to the target driver object.                    */
 457   /*                                                                       */
 458   /* <Return>                                                              */
 459   /*    FreeType error code.  0 means success.                             */
 460   /*                                                                       */
 461   FT_LOCAL_DEF( FT_Error )
 462   T42_Driver_Init( T42_Driver  driver )
 463   {
 464     FT_Module  ttmodule;
 465
 466
 467     ttmodule = FT_Get_Module( FT_MODULE(driver)->library, "truetype" );
 468     driver->ttclazz = (FT_Driver_Class)ttmodule->clazz;
 469
 470     return T42_Err_Ok;
 471   }
 472
 473
 474   FT_LOCAL_DEF( void )
 475   T42_Driver_Done( T42_Driver  driver )
 476   {
 477     FT_UNUSED( driver );
 478   }
 479
 480
 481   FT_LOCAL_DEF( FT_Error )
 482   T42_Size_Init( T42_Size  size )
 483   {
 484     FT_Face   face = size->root.face;
 485     T42_Face  t42face = (T42_Face)face;
 486     FT_Size   ttsize;
 487     FT_Error  error   = T42_Err_Ok;
 488
 489
 490     error = FT_New_Size( t42face->ttf_face, &ttsize );
 491     size->ttsize = ttsize;
 492
 493     FT_Activate_Size( ttsize );
 494
 495     return error;
 496   }
 497
 498
 499   FT_LOCAL_DEF( FT_Error )
 500   T42_Size_Request( T42_Size         size,
 501                     FT_Size_Request  req )
 502   {
 503     T42_Face  face = (T42_Face)size->root.face;
 504     FT_Error  error;
 505
 506
 507     FT_Activate_Size( size->ttsize );
 508
 509     error = FT_Request_Size( face->ttf_face, req );
 510     if ( !error )
 511       ( (FT_Size)size )->metrics = face->ttf_face->size->metrics;
 512
 513     return error;
 514   }
 515
 516
 517   FT_LOCAL_DEF( FT_Error )
 518   T42_Size_Select( T42_Size  size,
 519                    FT_ULong  strike_index )
 520   {
 521     T42_Face  face = (T42_Face)size->root.face;
 522     FT_Error  error;
 523
 524
 525     FT_Activate_Size( size->ttsize );
 526
 527     error = FT_Select_Size( face->ttf_face, (FT_Int)strike_index );
 528     if ( !error )
 529       ( (FT_Size)size )->metrics = face->ttf_face->size->metrics;
 530
 531     return error;
 532
 533   }
 534
 535
 536   FT_LOCAL_DEF( void )
 537   T42_Size_Done( T42_Size  size )
 538   {
 539     FT_Face      face    = size->root.face;
 540     T42_Face     t42face = (T42_Face)face;
 541     FT_ListNode  node;
 542
 543
 544     node = FT_List_Find( &t42face->ttf_face->sizes_list, size->ttsize );
 545     if ( node )
 546     {
 547       FT_Done_Size( size->ttsize );
 548       size->ttsize = NULL;
 549     }
 550   }
 551
 552
 553   FT_LOCAL_DEF( FT_Error )
 554   T42_GlyphSlot_Init( T42_GlyphSlot  slot )
 555   {
 556     FT_Face       face    = slot->root.face;
 557     T42_Face      t42face = (T42_Face)face;
 558     FT_GlyphSlot  ttslot;
 559     FT_Error      error   = T42_Err_Ok;
 560
 561
 562     if ( face->glyph == NULL )
 563     {
 564       /* First glyph slot for this face */
 565       slot->ttslot = t42face->ttf_face->glyph;
 566     }
 567     else
 568     {
 569       error = FT_New_GlyphSlot( t42face->ttf_face, &ttslot );
 570       slot->ttslot = ttslot;
 571     }
 572
 573     return error;
 574   }
 575
 576
 577   FT_LOCAL_DEF( void )
 578   T42_GlyphSlot_Done( T42_GlyphSlot slot )
 579   {
 580     FT_Done_GlyphSlot( slot->ttslot );
 581   }
 582
 583
 584   static void
 585   t42_glyphslot_clear( FT_GlyphSlot  slot )
 586   {
 587     /* free bitmap if needed */
 588     ft_glyphslot_free_bitmap( slot );
 589
 590     /* clear all public fields in the glyph slot */
 591     FT_ZERO( &slot->metrics );
 592     FT_ZERO( &slot->outline );
 593     FT_ZERO( &slot->bitmap );
 594
 595     slot->bitmap_left   = 0;
 596     slot->bitmap_top    = 0;
 597     slot->num_subglyphs = 0;
 598     slot->subglyphs     = 0;
 599     slot->control_data  = 0;
 600     slot->control_len   = 0;
 601     slot->other         = 0;
 602     slot->format        = FT_GLYPH_FORMAT_NONE;
 603
 604     slot->linearHoriAdvance = 0;
 605     slot->linearVertAdvance = 0;
 606   }
 607
 608
 609   FT_LOCAL_DEF( FT_Error )
 610   T42_GlyphSlot_Load( FT_GlyphSlot  glyph,
 611                       FT_Size       size,
 612                       FT_UInt       glyph_index,
 613                       FT_Int32      load_flags )
 614   {
 615     FT_Error         error;
 616     T42_GlyphSlot    t42slot = (T42_GlyphSlot)glyph;
 617     T42_Size         t42size = (T42_Size)size;
 618     FT_Driver_Class  ttclazz = ((T42_Driver)glyph->face->driver)->ttclazz;
 619
 620
 621     t42_glyphslot_clear( t42slot->ttslot );
 622     error = ttclazz->load_glyph( t42slot->ttslot,
 623                                  t42size->ttsize,
 624                                  glyph_index,
 625                                  load_flags | FT_LOAD_NO_BITMAP );
 626
 627     if ( !error )
 628     {
 629       glyph->metrics = t42slot->ttslot->metrics;
 630
 631       glyph->linearHoriAdvance = t42slot->ttslot->linearHoriAdvance;
 632       glyph->linearVertAdvance = t42slot->ttslot->linearVertAdvance;
 633
 634       glyph->format  = t42slot->ttslot->format;
 635       glyph->outline = t42slot->ttslot->outline;
 636
 637       glyph->bitmap      = t42slot->ttslot->bitmap;
 638       glyph->bitmap_left = t42slot->ttslot->bitmap_left;
 639       glyph->bitmap_top  = t42slot->ttslot->bitmap_top;
 640
 641       glyph->num_subglyphs = t42slot->ttslot->num_subglyphs;
 642       glyph->subglyphs     = t42slot->ttslot->subglyphs;
 643
 644       glyph->control_data  = t42slot->ttslot->control_data;
 645       glyph->control_len   = t42slot->ttslot->control_len;
 646     }
 647
 648     return error;
 649   }
 650
 651
 652 /* END */