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 by Roberto Alameda.       */
   8 /*                                                                         */
   9 /*  This file is part of the FreeType project, and may only be used,       */
  10 /*  modified, and distributed under the terms of the FreeType project      */
  11 /*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
  12 /*  this file you indicate that you have read the license and              */
  13 /*  understand and accept it fully.                                        */
  14 /*                                                                         */
  15 /***************************************************************************/
  16
  17
  18 #include "t42objs.h"
  19 #include "t42parse.h"
  20 #include "t42error.h"
  21 #include FT_INTERNAL_DEBUG_H
  22 #include FT_INTERNAL_STREAM_H
  23 #include FT_LIST_H
  24
  25
  26 #undef  FT_COMPONENT
  27 #define FT_COMPONENT  trace_t42
  28
  29
  30   static FT_Error
  31   T42_Open_Face( T42_Face  face )
  32   {
  33     T42_LoaderRec  loader;
  34     T42_Parser     parser;
  35     T1_Font        type1 = &face->type1;
  36     FT_Memory      memory = face->root.memory;
  37     FT_Error       error;
  38
  39     PSAux_Service  psaux  = (PSAux_Service)face->psaux;
  40
  41
  42     t42_loader_init( &loader, face );
  43
  44     parser = &loader.parser;
  45
  46     if ( FT_ALLOC( face->ttf_data, 12 ) )
  47       goto Exit;
  48
  49     error = t42_parser_init( parser,
  50                              face->root.stream,
  51                              memory,
  52                              psaux);
  53     if ( error )
  54       goto Exit;
  55
  56     error = t42_parse_dict( face, &loader,
  57                             parser->base_dict, parser->base_len );
  58     if ( error )
  59       goto Exit;
  60
  61     if ( type1->font_type != 42 )
  62     {
  63       error = T42_Err_Unknown_File_Format;
  64       goto Exit;
  65     }
  66
  67     /* now, propagate the charstrings and glyphnames tables */
  68     /* to the Type1 data                                    */
  69     type1->num_glyphs = loader.num_glyphs;
  70
  71     if ( !loader.charstrings.init )
  72     {
  73       FT_ERROR(( "T42_Open_Face: no charstrings array in face!\n" ));
  74       error = T42_Err_Invalid_File_Format;
  75     }
  76
  77     loader.charstrings.init  = 0;
  78     type1->charstrings_block = loader.charstrings.block;
  79     type1->charstrings       = loader.charstrings.elements;
  80     type1->charstrings_len   = loader.charstrings.lengths;
  81
  82     /* we copy the glyph names `block' and `elements' fields; */
  83     /* the `lengths' field must be released later             */
  84     type1->glyph_names_block    = loader.glyph_names.block;
  85     type1->glyph_names          = (FT_String**)loader.glyph_names.elements;
  86     loader.glyph_names.block    = 0;
  87     loader.glyph_names.elements = 0;
  88
  89     /* we must now build type1.encoding when we have a custom array */
  90     if ( type1->encoding_type == T1_ENCODING_TYPE_ARRAY )
  91     {
  92       FT_Int    charcode, idx, min_char, max_char;
  93       FT_Byte*  char_name;
  94       FT_Byte*  glyph_name;
  95
  96
  97       /* OK, we do the following: for each element in the encoding   */
  98       /* table, look up the index of the glyph having the same name  */
  99       /* as defined in the CharStrings array.                        */
 100       /* The index is then stored in type1.encoding.char_index, and  */
 101       /* the name in type1.encoding.char_name                        */
 102
 103       min_char = +32000;
 104       max_char = -32000;
 105
 106       charcode = 0;
 107       for ( ; charcode < loader.encoding_table.max_elems; charcode++ )
 108       {
 109         type1->encoding.char_index[charcode] = 0;
 110         type1->encoding.char_name [charcode] = (char *)".notdef";
 111
 112         char_name = loader.encoding_table.elements[charcode];
 113         if ( char_name )
 114           for ( idx = 0; idx < type1->num_glyphs; idx++ )
 115           {
 116             glyph_name = (FT_Byte*)type1->glyph_names[idx];
 117             if ( ft_strcmp( (const char*)char_name,
 118                             (const char*)glyph_name ) == 0 )
 119             {
 120               type1->encoding.char_index[charcode] = (FT_UShort)idx;
 121               type1->encoding.char_name [charcode] = (char*)glyph_name;
 122
 123               /* Change min/max encoded char only if glyph name is */
 124               /* not /.notdef                                      */
 125               if ( ft_strcmp( (const char*)".notdef",
 126                               (const char*)glyph_name ) != 0 )
 127               {
 128                 if ( charcode < min_char )
 129                   min_char = charcode;
 130                 if ( charcode > max_char )
 131                   max_char = charcode;
 132               }
 133               break;
 134             }
 135           }
 136       }
 137       type1->encoding.code_first = min_char;
 138       type1->encoding.code_last  = max_char;
 139       type1->encoding.num_chars  = loader.num_chars;
 140     }
 141
 142   Exit:
 143     t42_loader_done( &loader );
 144     return error;
 145   }
 146
 147
 148   /***************** Driver Functions *************/
 149
 150
 151   FT_LOCAL_DEF( FT_Error )
 152   T42_Face_Init( FT_Stream      stream,
 153                  T42_Face       face,
 154                  FT_Int         face_index,
 155                  FT_Int         num_params,
 156                  FT_Parameter*  params )
 157   {
 158     FT_Error            error;
 159     FT_Service_PsCMaps  psnames;
 160     PSAux_Service       psaux;
 161     FT_Face             root  = (FT_Face)&face->root;
 162     T1_Font             type1 = &face->type1;
 163     PS_FontInfo         info  = &type1->font_info;
 164
 165     FT_UNUSED( num_params );
 166     FT_UNUSED( params );
 167     FT_UNUSED( face_index );
 168     FT_UNUSED( stream );
 169
 170
 171     face->ttf_face       = NULL;
 172     face->root.num_faces = 1;
 173
 174     FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
 175     face->psnames = psnames;
 176
 177     face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
 178                                            "psaux" );
 179     psaux = (PSAux_Service)face->psaux;
 180
 181     /* open the tokenizer, this will also check the font format */
 182     error = T42_Open_Face( face );
 183     if ( error )
 184       goto Exit;
 185
 186     /* if we just wanted to check the format, leave successfully now */
 187     if ( face_index < 0 )
 188       goto Exit;
 189
 190     /* check the face index */
 191     if ( face_index != 0 )
 192     {
 193       FT_ERROR(( "T42_Face_Init: invalid face index\n" ));
 194       error = T42_Err_Invalid_Argument;
 195       goto Exit;
 196     }
 197
 198     /* Now load the font program into the face object */
 199
 200     /* Init the face object fields */
 201     /* Now set up root face fields */
 202
 203     root->num_glyphs   = type1->num_glyphs;
 204     root->num_charmaps = 0;
 205     root->face_index   = face_index;
 206
 207     root->face_flags = FT_FACE_FLAG_SCALABLE    |
 208                        FT_FACE_FLAG_HORIZONTAL  |
 209                        FT_FACE_FLAG_GLYPH_NAMES;
 210
 211     if ( info->is_fixed_pitch )
 212       root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
 213
 214     /* We only set this flag if we have the patented bytecode interpreter. */
 215     /* There are no known `tricky' Type42 fonts that could be loaded with  */
 216     /* the unpatented interpreter.                                         */
 217 #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
 218     root->face_flags |= FT_FACE_FLAG_HINTER;
 219 #endif
 220
 221     /* XXX: TODO -- add kerning with .afm support */
 222
 223     /* get style name -- be careful, some broken fonts only */
 224     /* have a `/FontName' dictionary entry!                 */
 225     root->family_name = info->family_name;
 226     /* assume "Regular" style if we don't know better */
 227     root->style_name = (char *)"Regular";
 228     if ( root->family_name )
 229     {
 230       char*  full   = info->full_name;
 231       char*  family = root->family_name;
 232
 233
 234       if ( full )
 235       {
 236         while ( *full )
 237         {
 238           if ( *full == *family )
 239           {
 240             family++;
 241             full++;
 242           }
 243           else
 244           {
 245             if ( *full == ' ' || *full == '-' )
 246               full++;
 247             else if ( *family == ' ' || *family == '-' )
 248               family++;
 249             else
 250             {
 251               if ( !*family )
 252                 root->style_name = full;
 253               break;
 254             }
 255           }
 256         }
 257       }
 258     }
 259     else
 260     {
 261       /* do we have a `/FontName'? */
 262       if ( type1->font_name )
 263         root->family_name = type1->font_name;
 264     }
 265
 266     /* no embedded bitmap support */
 267     root->num_fixed_sizes = 0;
 268     root->available_sizes = 0;
 269
 270     /* Load the TTF font embedded in the T42 font */
 271     {
 272       FT_Open_Args  args;
 273
 274
 275       args.flags       = FT_OPEN_MEMORY;
 276       args.memory_base = face->ttf_data;
 277       args.memory_size = face->ttf_size;
 278
 279       if ( num_params )
 280       {
 281         args.flags     |= FT_OPEN_PARAMS;
 282         args.num_params = num_params;
 283         args.params     = params;
 284       }
 285
 286       error = FT_Open_Face( FT_FACE_LIBRARY( face ),
 287                             &args, 0, &face->ttf_face );
 288     }
 289
 290     if ( error )
 291       goto Exit;
 292
 293     FT_Done_Size( face->ttf_face->size );
 294
 295     /* Ignore info in FontInfo dictionary and use the info from the  */
 296     /* loaded TTF font.  The PostScript interpreter also ignores it. */
 297     root->bbox         = face->ttf_face->bbox;
 298     root->units_per_EM = face->ttf_face->units_per_EM;
 299
 300     root->ascender  = face->ttf_face->ascender;
 301     root->descender = face->ttf_face->descender;
 302     root->height    = face->ttf_face->height;
 303
 304     root->max_advance_width  = face->ttf_face->max_advance_width;
 305     root->max_advance_height = face->ttf_face->max_advance_height;
 306
 307     root->underline_position  = (FT_Short)info->underline_position;
 308     root->underline_thickness = (FT_Short)info->underline_thickness;
 309
 310     /* compute style flags */
 311     root->style_flags = 0;
 312     if ( info->italic_angle )
 313       root->style_flags |= FT_STYLE_FLAG_ITALIC;
 314
 315     if ( face->ttf_face->style_flags & FT_STYLE_FLAG_BOLD )
 316       root->style_flags |= FT_STYLE_FLAG_BOLD;
 317
 318     if ( face->ttf_face->face_flags & FT_FACE_FLAG_VERTICAL )
 319       root->face_flags |= FT_FACE_FLAG_VERTICAL;
 320
 321     {
 322       if ( psnames && psaux )
 323       {
 324         FT_CharMapRec    charmap;
 325         T1_CMap_Classes  cmap_classes = psaux->t1_cmap_classes;
 326         FT_CMap_Class    clazz;
 327
 328
 329         charmap.face = root;
 330
 331         /* first of all, try to synthetize a Unicode charmap */
 332         charmap.platform_id = 3;
 333         charmap.encoding_id = 1;
 334         charmap.encoding    = FT_ENCODING_UNICODE;
 335
 336         FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL );
 337
 338         /* now, generate an Adobe Standard encoding when appropriate */
 339         charmap.platform_id = 7;
 340         clazz               = NULL;
 341
 342         switch ( type1->encoding_type )
 343         {
 344         case T1_ENCODING_TYPE_STANDARD:
 345           charmap.encoding    = FT_ENCODING_ADOBE_STANDARD;
 346           charmap.encoding_id = 0;
 347           clazz               = cmap_classes->standard;
 348           break;
 349
 350         case T1_ENCODING_TYPE_EXPERT:
 351           charmap.encoding    = FT_ENCODING_ADOBE_EXPERT;
 352           charmap.encoding_id = 1;
 353           clazz               = cmap_classes->expert;
 354           break;
 355
 356         case T1_ENCODING_TYPE_ARRAY:
 357           charmap.encoding    = FT_ENCODING_ADOBE_CUSTOM;
 358           charmap.encoding_id = 2;
 359           clazz               = cmap_classes->custom;
 360           break;
 361
 362         case T1_ENCODING_TYPE_ISOLATIN1:
 363           charmap.encoding    = FT_ENCODING_ADOBE_LATIN_1;
 364           charmap.encoding_id = 3;
 365           clazz               = cmap_classes->unicode;
 366           break;
 367
 368         default:
 369           ;
 370         }
 371
 372         if ( clazz )
 373           FT_CMap_New( clazz, NULL, &charmap, NULL );
 374
 375 #if 0
 376         /* Select default charmap */
 377         if ( root->num_charmaps )
 378           root->charmap = root->charmaps[0];
 379 #endif
 380       }
 381     }
 382   Exit:
 383     return error;
 384   }
 385
 386
 387   FT_LOCAL_DEF( void )
 388   T42_Face_Done( T42_Face  face )
 389   {
 390     T1_Font      type1;
 391     PS_FontInfo  info;
 392     FT_Memory    memory;
 393
 394
 395     if ( face )
 396     {
 397       type1  = &face->type1;
 398       info   = &type1->font_info;
 399       memory = face->root.memory;
 400
 401       /* delete internal ttf face prior to freeing face->ttf_data */
 402       if ( face->ttf_face )
 403         FT_Done_Face( face->ttf_face );
 404
 405       /* release font info strings */
 406       FT_FREE( info->version );
 407       FT_FREE( info->notice );
 408       FT_FREE( info->full_name );
 409       FT_FREE( info->family_name );
 410       FT_FREE( info->weight );
 411
 412       /* release top dictionary */
 413       FT_FREE( type1->charstrings_len );
 414       FT_FREE( type1->charstrings );
 415       FT_FREE( type1->glyph_names );
 416
 417       FT_FREE( type1->charstrings_block );
 418       FT_FREE( type1->glyph_names_block );
 419
 420       FT_FREE( type1->encoding.char_index );
 421       FT_FREE( type1->encoding.char_name );
 422       FT_FREE( type1->font_name );
 423
 424       FT_FREE( face->ttf_data );
 425
 426 #if 0
 427       /* release afm data if present */
 428       if ( face->afm_data )
 429         T1_Done_AFM( memory, (T1_AFM*)face->afm_data );
 430 #endif
 431
 432       /* release unicode map, if any */
 433       FT_FREE( face->unicode_map.maps );
 434       face->unicode_map.num_maps = 0;
 435
 436       face->root.family_name = 0;
 437       face->root.style_name  = 0;
 438     }
 439   }
 440
 441
 442   /*************************************************************************/
 443   /*                                                                       */
 444   /* <Function>                                                            */
 445   /*    T42_Driver_Init                                                    */
 446   /*                                                                       */
 447   /* <Description>                                                         */
 448   /*    Initializes a given Type 42 driver object.                         */
 449   /*                                                                       */
 450   /* <Input>                                                               */
 451   /*    driver :: A handle to the target driver object.                    */
 452   /*                                                                       */
 453   /* <Return>                                                              */
 454   /*    FreeType error code.  0 means success.                             */
 455   /*                                                                       */
 456   FT_LOCAL_DEF( FT_Error )
 457   T42_Driver_Init( T42_Driver  driver )
 458   {
 459     FT_Module  ttmodule;
 460
 461
 462     ttmodule = FT_Get_Module( FT_MODULE(driver)->library, "truetype" );
 463     driver->ttclazz = (FT_Driver_Class)ttmodule->clazz;
 464
 465     return T42_Err_Ok;
 466   }
 467
 468
 469   FT_LOCAL_DEF( void )
 470   T42_Driver_Done( T42_Driver  driver )
 471   {
 472     FT_UNUSED( driver );
 473   }
 474
 475
 476   FT_LOCAL_DEF( FT_Error )
 477   T42_Size_Init( T42_Size  size )
 478   {
 479     FT_Face   face = size->root.face;
 480     T42_Face  t42face = (T42_Face)face;
 481     FT_Size   ttsize;
 482     FT_Error  error   = T42_Err_Ok;
 483
 484
 485     error = FT_New_Size( t42face->ttf_face, &ttsize );
 486     size->ttsize = ttsize;
 487
 488     FT_Activate_Size( ttsize );
 489
 490     return error;
 491   }
 492
 493
 494   FT_LOCAL_DEF( FT_Error )
 495   T42_Size_Request( T42_Size         size,
 496                     FT_Size_Request  req )
 497   {
 498     T42_Face  face = (T42_Face)size->root.face;
 499     FT_Error  error;
 500
 501
 502     FT_Activate_Size( size->ttsize );
 503
 504     error = FT_Request_Size( face->ttf_face, req );
 505     if ( !error )
 506       ( (FT_Size)size )->metrics = face->ttf_face->size->metrics;
 507
 508     return error;
 509   }
 510
 511
 512   FT_LOCAL_DEF( FT_Error )
 513   T42_Size_Select( T42_Size  size,
 514                    FT_ULong  strike_index )
 515   {
 516     T42_Face  face = (T42_Face)size->root.face;
 517     FT_Error  error;
 518
 519
 520     FT_Activate_Size( size->ttsize );
 521
 522     error = FT_Select_Size( face->ttf_face, strike_index );
 523     if ( !error )
 524       ( (FT_Size)size )->metrics = face->ttf_face->size->metrics;
 525
 526     return error;
 527
 528   }
 529
 530
 531   FT_LOCAL_DEF( void )
 532   T42_Size_Done( T42_Size  size )
 533   {
 534     FT_Face      face    = size->root.face;
 535     T42_Face     t42face = (T42_Face)face;
 536     FT_ListNode  node;
 537
 538
 539     node = FT_List_Find( &t42face->ttf_face->sizes_list, size->ttsize );
 540     if ( node )
 541     {
 542       FT_Done_Size( size->ttsize );
 543       size->ttsize = NULL;
 544     }
 545   }
 546
 547
 548   FT_LOCAL_DEF( FT_Error )
 549   T42_GlyphSlot_Init( T42_GlyphSlot  slot )
 550   {
 551     FT_Face       face    = slot->root.face;
 552     T42_Face      t42face = (T42_Face)face;
 553     FT_GlyphSlot  ttslot;
 554     FT_Error      error   = T42_Err_Ok;
 555
 556
 557     if ( face->glyph == NULL )
 558     {
 559       /* First glyph slot for this face */
 560       slot->ttslot = t42face->ttf_face->glyph;
 561     }
 562     else
 563     {
 564       error = FT_New_GlyphSlot( t42face->ttf_face, &ttslot );
 565       slot->ttslot = ttslot;
 566     }
 567
 568     return error;
 569   }
 570
 571
 572   FT_LOCAL_DEF( void )
 573   T42_GlyphSlot_Done( T42_GlyphSlot slot )
 574   {
 575     FT_Done_GlyphSlot( slot->ttslot );
 576   }
 577
 578
 579   static void
 580   t42_glyphslot_clear( FT_GlyphSlot  slot )
 581   {
 582     /* free bitmap if needed */
 583     ft_glyphslot_free_bitmap( slot );
 584
 585     /* clear all public fields in the glyph slot */
 586     FT_ZERO( &slot->metrics );
 587     FT_ZERO( &slot->outline );
 588     FT_ZERO( &slot->bitmap );
 589
 590     slot->bitmap_left   = 0;
 591     slot->bitmap_top    = 0;
 592     slot->num_subglyphs = 0;
 593     slot->subglyphs     = 0;
 594     slot->control_data  = 0;
 595     slot->control_len   = 0;
 596     slot->other         = 0;
 597     slot->format        = FT_GLYPH_FORMAT_NONE;
 598
 599     slot->linearHoriAdvance = 0;
 600     slot->linearVertAdvance = 0;
 601   }
 602
 603
 604   FT_LOCAL_DEF( FT_Error )
 605   T42_GlyphSlot_Load( FT_GlyphSlot  glyph,
 606                       FT_Size       size,
 607                       FT_UInt       glyph_index,
 608                       FT_Int32      load_flags )
 609   {
 610     FT_Error         error;
 611     T42_GlyphSlot    t42slot = (T42_GlyphSlot)glyph;
 612     T42_Size         t42size = (T42_Size)size;
 613     FT_Driver_Class  ttclazz = ((T42_Driver)glyph->face->driver)->ttclazz;
 614
 615
 616     t42_glyphslot_clear( t42slot->ttslot );
 617     error = ttclazz->load_glyph( t42slot->ttslot,
 618                                  t42size->ttsize,
 619                                  glyph_index,
 620                                  load_flags | FT_LOAD_NO_BITMAP );
 621
 622     if ( !error )
 623     {
 624       glyph->metrics = t42slot->ttslot->metrics;
 625
 626       glyph->linearHoriAdvance = t42slot->ttslot->linearHoriAdvance;
 627       glyph->linearVertAdvance = t42slot->ttslot->linearVertAdvance;
 628
 629       glyph->format  = t42slot->ttslot->format;
 630       glyph->outline = t42slot->ttslot->outline;
 631
 632       glyph->bitmap      = t42slot->ttslot->bitmap;
 633       glyph->bitmap_left = t42slot->ttslot->bitmap_left;
 634       glyph->bitmap_top  = t42slot->ttslot->bitmap_top;
 635
 636       glyph->num_subglyphs = t42slot->ttslot->num_subglyphs;
 637       glyph->subglyphs     = t42slot->ttslot->subglyphs;
 638
 639       glyph->control_data  = t42slot->ttslot->control_data;
 640       glyph->control_len   = t42slot->ttslot->control_len;
 641     }
 642
 643     return error;
 644   }
 645
 646
 647 /* END */