t1load.c

qt-embedded-2.3.8.tar.gz源码

        n++;
        if ( n >= loader->num_glyphs )
          break;
      }
    }

    loader->num_glyphs = n;

    /* if /.notdef is found but does not occupy index 0, do our magic.      */
    if ( strcmp( (const char*)".notdef",
                 (const char*)name_table->elements[0] ) &&
         notdef_found                                      )
    {

      /* Swap glyph in index 0 with /.notdef glyph.  First, add index 0     */
      /* name/code to end of table. Then place notdef_index name/code into  */
      /* index 0.  Then take end of table name/code and place it into index */
      /* notdef_index.                                                      */

      error = T1_Add_Table( name_table, n,
                            name_table->elements[0],
                            name_table->lengths [0] );
      if ( error )
        goto Fail;
      error = T1_Add_Table( code_table, n,
                            code_table->elements[0],
                            code_table->lengths [0] );
      if ( error )
        goto Fail;

      error = T1_Add_Table( name_table, 0,
                            name_table->elements[notdef_index],
                            name_table->lengths [notdef_index] );
      if ( error )
        goto Fail;

      error = T1_Add_Table( code_table, 0,
                            code_table->elements[notdef_index],
                            code_table->lengths [notdef_index] );
      if ( error )
        goto Fail;

      error = T1_Add_Table( name_table, notdef_index,
                            name_table->elements[n],
                            name_table->lengths [n] );
      if ( error )
        goto Fail;

      error = T1_Add_Table( code_table, notdef_index,
                            code_table->elements[n],
                            code_table->lengths [n] );
      if ( error )
        goto Fail;

    }
    else if ( !notdef_found )
    {

      /* notdef_index is already 0, or /.notdef is undefined in  */
      /* charstrings dictionary. Worry about /.notdef undefined. */
      /* we take index 0 and add it to the end of the table(s)   */
      /* and add our own /.notdef glyph to index 0.              */

      /* 0 333 hsbw endchar                                      */
      FT_Byte  notdef_glyph[] = {0x8B, 0xF7, 0xE1, 0x0D, 0x0E};
      char*    notdef_name    = (char *)".notdef";


      error = T1_Add_Table( name_table, n,
                            name_table->elements[0],
                            name_table->lengths [0] );
      if ( error )
        goto Fail;

      error = T1_Add_Table( code_table, n,
                            code_table->elements[0],
                            code_table->lengths [0] );
      if ( error )
        goto Fail;

      error = T1_Add_Table( name_table, 0, notdef_name, 8 );
      if ( error )
        goto Fail;

      error = T1_Add_Table( code_table, 0, notdef_glyph, 5 );

      if ( error )
        goto Fail;

      /* we added a glyph. */
      loader->num_glyphs = n + 1;

    }

    return;

  Fail:
    parser->root.error = error;
  }


  static
  const T1_Field  t1_keywords[] =
  {

#ifdef FT_FLAT_COMPILE

#include "t1tokens.h"

#else

#include <type1/t1tokens.h>

#endif

    /* now add the special functions... */
    T1_FIELD_CALLBACK( "FontName", parse_font_name )
    T1_FIELD_CALLBACK( "FontBBox", parse_font_bbox )
    T1_FIELD_CALLBACK( "FontMatrix", parse_font_matrix )
    T1_FIELD_CALLBACK( "Encoding", parse_encoding )
    T1_FIELD_CALLBACK( "Subrs", parse_subrs )
    T1_FIELD_CALLBACK( "CharStrings", parse_charstrings )

#ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
    T1_FIELD_CALLBACK( "BlendDesignPositions", parse_blend_design_positions )
    T1_FIELD_CALLBACK( "BlendDesignMap", parse_blend_design_map )
    T1_FIELD_CALLBACK( "BlendAxisTypes", parse_blend_axis_types )
    T1_FIELD_CALLBACK( "WeightVector", parse_weight_vector )
    T1_FIELD_CALLBACK( "shareddict", parse_shared_dict )
#endif

    { 0, t1_field_cid_info, t1_field_none, 0, 0, 0, 0, 0 }
  };


  static
  FT_Error  parse_dict( T1_Face     face,
                        T1_Loader*  loader,
                        FT_Byte*    base,
                        FT_Long     size )
  {
    T1_ParserRec*  parser = &loader->parser;


    parser->root.cursor = base;
    parser->root.limit  = base + size;
    parser->root.error  = 0;

    {
      FT_Byte*  cur   = base;
      FT_Byte*  limit = cur + size;


      for ( ; cur < limit; cur++ )
      {
        /* look for `FontDirectory', which causes problems on some fonts */
        if ( *cur == 'F' && cur + 25 < limit                 &&
             strncmp( (char*)cur, "FontDirectory", 13 ) == 0 )
        {
          FT_Byte*  cur2;


          /* skip the `FontDirectory' keyword */
          cur += 13;
          cur2 = cur;

          /* lookup the `known' keyword */
          while ( cur < limit && *cur != 'k'        &&
                  strncmp( (char*)cur, "known", 5 ) )
            cur++;

          if ( cur < limit )
          {
            T1_Token  token;


            /* skip the `known' keyword and the token following it */
            cur += 5;
            loader->parser.root.cursor = cur;
            T1_ToToken( &loader->parser, &token );

            /* if the last token was an array, skip it! */
            if ( token.type == t1_token_array )
              cur2 = parser->root.cursor;
          }
          cur = cur2;
        }
        /* look for immediates */
        else if ( *cur == '/' && cur + 2 < limit )
        {
          FT_Byte*  cur2;
          FT_Int    len;


          cur++;
          cur2 = cur;
          while ( cur2 < limit && is_alpha( *cur2 ) )
            cur2++;

          len  = cur2 - cur;
          if ( len > 0 && len < 22 )
          {
            if ( !loader->fontdata )
            {
              if ( strncmp( (char*)cur, "FontInfo", 8 ) == 0 )
                loader->fontdata = 1;
            }
            else
            {
              /* now, compare the immediate name to the keyword table */
              T1_Field*  keyword = (T1_Field*)t1_keywords;


              for (;;)
              {
                FT_Byte*  name;


                name = (FT_Byte*)keyword->ident;
                if ( !name )
                  break;

                if ( cur[0] == name[0]                          &&
                     len == (FT_Int)strlen( (const char*)name ) )
                {
                  FT_Int  n;


                  for ( n = 1; n < len; n++ )
                    if ( cur[n] != name[n] )
                      break;

                  if ( n >= len )
                  {
                    /* we found it -- run the parsing callback! */
                    parser->root.cursor = cur2;
                    T1_Skip_Spaces( parser );
                    parser->root.error = t1_load_keyword( face,
                                                          loader,
                                                          keyword );
                    if ( parser->root.error )
                      return parser->root.error;

                    cur = parser->root.cursor;
                    break;
                  }
                }
                keyword++;
              }
            }
          }
        }
      }
    }
    return parser->root.error;
  }


  static
  void  t1_init_loader( T1_Loader*  loader,
                        T1_Face     face )
  {
    FT_UNUSED( face );

    MEM_Set( loader, 0, sizeof ( *loader ) );
    loader->num_glyphs = 0;
    loader->num_chars  = 0;

    /* initialize the tables -- simply set their `init' field to 0 */
    loader->encoding_table.init = 0;
    loader->charstrings.init    = 0;
    loader->glyph_names.init    = 0;
    loader->subrs.init          = 0;
    loader->fontdata            = 0;
  }


  static
  void  t1_done_loader( T1_Loader*  loader )
  {
    T1_ParserRec*  parser = &loader->parser;


    /* finalize tables */
    T1_Release_Table( &loader->encoding_table );
    T1_Release_Table( &loader->charstrings );
    T1_Release_Table( &loader->glyph_names );
    T1_Release_Table( &loader->subrs );

    /* finalize parser */
    T1_Finalize_Parser( parser );
  }


  FT_LOCAL_DEF
  FT_Error  T1_Open_Face( T1_Face  face )
  {
    T1_Loader      loader;
    T1_ParserRec*  parser;
    T1_Font*       type1 = &face->type1;
    FT_Error       error;

    PSAux_Interface*  psaux = (PSAux_Interface*)face->psaux;


    t1_init_loader( &loader, face );

    /* default lenIV */
    type1->private_dict.lenIV = 4;

    parser = &loader.parser;
    error = T1_New_Parser( parser,
                           face->root.stream,
                           face->root.memory,
                           psaux );
    if ( error )
      goto Exit;

    error = parse_dict( face, &loader, parser->base_dict, parser->base_len );
    if ( error )
      goto Exit;

    error = T1_Get_Private_Dict( parser, psaux );
    if ( error )
      goto Exit;

    error = parse_dict( face, &loader, parser->private_dict,
                        parser->private_len );
    if ( error )
      goto Exit;

    /* now, propagate the subrs, charstrings, and glyphnames tables */
    /* to the Type1 data                                            */
    type1->num_glyphs = loader.num_glyphs;

    if ( !loader.subrs.init )
    {
      FT_ERROR(( "T1_Open_Face: no subrs array in face!\n" ));
      error = T1_Err_Invalid_File_Format;
    }

    if ( !loader.charstrings.init )
    {
      FT_ERROR(( "T1_Open_Face: no charstrings array in face!\n" ));
      error = T1_Err_Invalid_File_Format;
    }

    loader.subrs.init  = 0;
    type1->num_subrs   = loader.num_subrs;
    type1->subrs_block = loader.subrs.block;
    type1->subrs       = loader.subrs.elements;
    type1->subrs_len   = loader.subrs.lengths;

    loader.charstrings.init  = 0;
    type1->charstrings_block = loader.charstrings.block;
    type1->charstrings       = loader.charstrings.elements;
    type1->charstrings_len   = loader.charstrings.lengths;

    /* we copy the glyph names `block' and `elements' fields; */
    /* the `lengths' field must be released later             */
    type1->glyph_names_block    = loader.glyph_names.block;
    type1->glyph_names          = (FT_String**)loader.glyph_names.elements;
    loader.glyph_names.block    = 0;
    loader.glyph_names.elements = 0;

    /* we must now build type1.encoding when we have a custom */
    /* array..                                                */
    if ( type1->encoding_type == t1_encoding_array )
    {
      FT_Int    charcode, index, min_char, max_char;
      FT_Byte*  char_name;
      FT_Byte*  glyph_name;


      /* OK, we do the following: for each element in the encoding  */
      /* table, look up the index of the glyph having the same name */
      /* the index is then stored in type1.encoding.char_index, and */
      /* a the name to type1.encoding.char_name                     */

      min_char = +32000;
      max_char = -32000;

      charcode = 0;
      for ( ; charcode < loader.encoding_table.max_elems; charcode++ )
      {
        type1->encoding.char_index[charcode] = 0;
        type1->encoding.char_name [charcode] = (char *)".notdef";

        char_name = loader.encoding_table.elements[charcode];
        if ( char_name )
          for ( index = 0; index < type1->num_glyphs; index++ )
          {
            glyph_name = (FT_Byte*)type1->glyph_names[index];
            if ( strcmp( (const char*)char_name,
                         (const char*)glyph_name ) == 0 )
            {
              type1->encoding.char_index[charcode] = index;
              type1->encoding.char_name [charcode] = (char*)glyph_name;

              /* Change min/max encoded char only if glyph name is */
              /* not /.notdef                                      */
              if ( strcmp( (const char*)".notdef",
                           (const char*)glyph_name ) != 0 )
              {
                if (charcode < min_char) min_char = charcode;
                if (charcode > max_char) max_char = charcode;
              }
              break;
            }
          }
      }
      type1->encoding.code_first = min_char;
      type1->encoding.code_last  = max_char;
      type1->encoding.num_chars  = loader.num_chars;
   }

  Exit:
    t1_done_loader( &loader );
    return error;
  }


/* END */