t1load.c

qt-embedded-2.3.8.tar.gz源码

    {
      if ( ALLOC( face->type1.font_name, len + 1 ) )
      {
        parser->root.error = error;
        return;
      }

      MEM_Copy( face->type1.font_name, cur, len );
      face->type1.font_name[len] = '\0';
    }
    parser->root.cursor = cur2;
  }


  static
  void  parse_font_bbox( T1_Face     face,
                         T1_Loader*  loader )
  {
    T1_ParserRec*  parser = &loader->parser;
    FT_Short       temp[4];
    FT_BBox*       bbox   = &face->type1.font_bbox;


    (void)T1_ToCoordArray( parser, 4, temp );
    bbox->xMin = temp[0];
    bbox->yMin = temp[1];
    bbox->xMax = temp[2];
    bbox->yMax = temp[3];
  }


  static
  void  parse_font_matrix( T1_Face     face,
                           T1_Loader*  loader )
  {
    T1_ParserRec*  parser = &loader->parser;
    FT_Matrix*     matrix = &face->type1.font_matrix;
    FT_Vector*     offset = &face->type1.font_offset;
    FT_Fixed       temp[6];


    if ( matrix->xx || matrix->yx )
      /*  with synthetic fonts, it's possible we get here twice  */
      return;

    (void)T1_ToFixedArray( parser, 6, temp, 3 );

    /* we need to scale the values by 1.0/temp[3] */
    if ( temp[3] != 0x10000L )
    {
      temp[0] = FT_DivFix( temp[0], temp[3] );
      temp[1] = FT_DivFix( temp[1], temp[3] );
      temp[2] = FT_DivFix( temp[2], temp[3] );
      temp[4] = FT_DivFix( temp[4], temp[3] );
      temp[5] = FT_DivFix( temp[5], temp[3] );
      temp[3] = 0x10000L;
    }

    matrix->xx = temp[0];
    matrix->yx = temp[1];
    matrix->xy = temp[2];
    matrix->yy = temp[3];

    /* note that the offsets must be expressed in integer font units */
    offset->x  = temp[4] >> 16;
    offset->y  = temp[5] >> 16;
  }


  static
  void  parse_encoding( T1_Face     face,
                        T1_Loader*  loader )
  {
    T1_ParserRec*  parser = &loader->parser;
    FT_Byte*       cur    = parser->root.cursor;
    FT_Byte*       limit  = parser->root.limit;

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


    /* skip whitespace */
    while ( is_space( *cur ) )
    {
      cur++;
      if ( cur >= limit )
      {
        FT_ERROR(( "parse_encoding: out of bounds!\n" ));
        parser->root.error = T1_Err_Invalid_File_Format;
        return;
      }
    }

    /* if we have a number, then the encoding is an array, */
    /* and we must load it now                             */
    if ( (FT_Byte)( *cur - '0' ) < 10 )
    {
      T1_Encoding*  encode     = &face->type1.encoding;
      FT_Int        count, n;
      PS_Table*     char_table = &loader->encoding_table;
      FT_Memory     memory     = parser->root.memory;
      FT_Error      error;


      /* read the number of entries in the encoding, should be 256 */
      count = T1_ToInt( parser );
      if ( parser->root.error )
        return;

      /* we use a T1_Table to store our charnames */
      encode->num_chars = count;
      if ( ALLOC_ARRAY( encode->char_index, count, FT_Short   ) ||
           ALLOC_ARRAY( encode->char_name,  count, FT_String* ) ||
           ( error = psaux->ps_table_funcs->init(
                       char_table, count, memory ) ) != 0       )
      {
        parser->root.error = error;
        return;
      }

      /* We need to `zero' out encoding_table.elements          */
      for ( n = 0; n < count; n++ )
      {
        char*  notdef = (char *)".notdef";


        T1_Add_Table( char_table, n, notdef, 8 );
      }

      /* Now, we will need to read a record of the form         */
      /* ... charcode /charname ... for each entry in our table */
      /*                                                        */
      /* We simply look for a number followed by an immediate   */
      /* name.  Note that this ignores correctly the sequence   */
      /* that is often seen in type1 fonts:                     */
      /*                                                        */
      /*   0 1 255 { 1 index exch /.notdef put } for dup        */
      /*                                                        */
      /* used to clean the encoding array before anything else. */
      /*                                                        */
      /* We stop when we encounter a `def'.                     */

      cur   = parser->root.cursor;
      limit = parser->root.limit;
      n     = 0;

      for ( ; cur < limit; )
      {
        FT_Byte  c;


        c = *cur;

        /* we stop when we encounter a `def' */
        if ( c == 'd' && cur + 3 < limit )
        {
          if ( cur[1] == 'e' &&
               cur[2] == 'f' &&
               is_space(cur[-1]) &&
               is_space(cur[3]) )
          {
            FT_TRACE6(( "encoding end\n" ));
            break;
          }
        }

        /* otherwise, we must find a number before anything else */
        if ( (FT_Byte)( c - '0' ) < 10 )
        {
          FT_Int  charcode;


          parser->root.cursor = cur;
          charcode = T1_ToInt( parser );
          cur = parser->root.cursor;

          /* skip whitespace */
          while ( cur < limit && is_space( *cur ) )
            cur++;

          if ( cur < limit && *cur == '/' )
          {
            /* bingo, we have an immediate name -- it must be a */
            /* character name                                   */
            FT_Byte*  cur2 = cur + 1;
            FT_Int    len;


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

            len = cur2 - cur - 1;

            parser->root.error = T1_Add_Table( char_table, charcode,
                                          cur + 1, len + 1 );
            char_table->elements[charcode][len] = '\0';
            if ( parser->root.error )
              return;

            cur = cur2;
          }
        }
        else
          cur++;
      }

      face->type1.encoding_type = t1_encoding_array;
      parser->root.cursor       = cur;
    }
    /* Otherwise, we should have either `StandardEncoding' or */
    /* `ExpertEncoding'                                       */
    else
    {
      if ( cur + 17 < limit &&
           strncmp( (const char*)cur, "StandardEncoding", 16 ) == 0 )
        face->type1.encoding_type = t1_encoding_standard;

      else if ( cur + 15 < limit &&
                strncmp( (const char*)cur, "ExpertEncoding", 14 ) == 0 )
        face->type1.encoding_type = t1_encoding_expert;

      else
      {
        FT_ERROR(( "parse_encoding: invalid token!\n" ));
        parser->root.error = T1_Err_Invalid_File_Format;
      }
    }
  }


  static
  void  parse_subrs( T1_Face     face,
                     T1_Loader*  loader )
  {
    T1_ParserRec*  parser = &loader->parser;
    PS_Table*      table  = &loader->subrs;
    FT_Memory      memory = parser->root.memory;
    FT_Error       error;
    FT_Int         n;

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


    loader->num_subrs = T1_ToInt( parser );
    if ( parser->root.error )
      return;

    /* position the parser right before the `dup' of the first subr */
    T1_Skip_Spaces( parser );
    T1_Skip_Alpha( parser );      /* `array' */
    T1_Skip_Spaces( parser );

    /* initialize subrs array */
    error = psaux->ps_table_funcs->init( table, loader->num_subrs, memory );
    if ( error )
      goto Fail;

    /* the format is simple:                                 */
    /*                                                       */
    /*   `index' + binary data                               */
    /*                                                       */

    for ( n = 0; n < loader->num_subrs; n++ )
    {
      FT_Int    index, size;
      FT_Byte*  base;


      /* If the next token isn't `dup', we are also done.  This */
      /* happens when there are `holes' in the Subrs array.     */
      if ( strncmp( (char*)parser->root.cursor, "dup", 3 ) != 0 )
        break;

      index = T1_ToInt( parser );

      if ( !read_binary_data( parser, &size, &base ) )
        return;

      /* The binary string is followed by one token, e.g. `NP' */
      /* (bound to `noaccess put') or by two separate tokens:  */
      /* `noaccess' & `put'.  We position the parser right     */
      /* before the next `dup', if any.                        */
      T1_Skip_Spaces( parser );
      T1_Skip_Alpha( parser );    /* `NP' or `I' or `noaccess' */
      T1_Skip_Spaces( parser );

      if ( strncmp( (char*)parser->root.cursor, "put", 3 ) == 0 )
      {
        T1_Skip_Alpha( parser );  /* skip `put' */
        T1_Skip_Spaces( parser );
      }

      /* some fonts use a value of -1 for lenIV to indicate that */
      /* the charstrings are unencoded                           */
      /*                                                         */
      /* thanks to Tom Kacvinsky for pointing this out           */
      /*                                                         */
      if ( face->type1.private_dict.lenIV >= 0 )
      {
        psaux->t1_decrypt( base, size, 4330 );
        size -= face->type1.private_dict.lenIV;
        base += face->type1.private_dict.lenIV;
      }

      error = T1_Add_Table( table, index, base, size );
      if ( error )
        goto Fail;
    }
    return;

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


  static
  void  parse_charstrings( T1_Face     face,
                           T1_Loader*  loader )
  {
    T1_ParserRec*  parser     = &loader->parser;
    PS_Table*      code_table = &loader->charstrings;
    PS_Table*      name_table = &loader->glyph_names;
    FT_Memory      memory     = parser->root.memory;
    FT_Error       error;

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

    FT_Byte*    cur;
    FT_Byte*    limit = parser->root.limit;
    FT_Int      n;
    FT_UInt     notdef_index = 0;
    FT_Byte     notdef_found = 0;


    if ( loader->num_glyphs )
      /*  with synthetic fonts, it's possible we get here twice  */
      return;

    loader->num_glyphs = T1_ToInt( parser );
    if ( parser->root.error )
      return;

    /* initialize tables, adding space for `swap' at table end   */
    error = psaux->ps_table_funcs->init( code_table,
                                         loader->num_glyphs + 1,
                                         memory );
    if ( error )
      goto Fail;

    error = psaux->ps_table_funcs->init( name_table,
                                         loader->num_glyphs + 1,
                                         memory );
    if ( error )
      goto Fail;

    n = 0;
    for (;;)
    {
      FT_Int    size;
      FT_Byte*  base;


      /* the format is simple:                    */
      /*   `/glyphname' + binary data             */
      /*                                          */
      /* note that we stop when we find a `def'   */
      /*                                          */
      T1_Skip_Spaces( parser );

      cur = parser->root.cursor;
      if ( cur >= limit )
        break;

      /* we stop when we find a `def' or `end' keyword */
      if ( *cur   == 'd'   &&
           cur + 3 < limit &&
           cur[1] == 'e'   &&
           cur[2] == 'f'   )
        break;

      if ( *cur   == 'e'   &&
           cur + 3 < limit &&
           cur[1] == 'n'   &&
           cur[2] == 'd'   )
        break;

      if ( *cur != '/' )
        T1_Skip_Alpha( parser );
      else
      {
        FT_Byte*  cur2 = cur + 1;
        FT_Int    len;


        while ( cur2 < limit && is_alpha( *cur2 ) )
          cur2++;
        len = cur2 - cur - 1;

        error = T1_Add_Table( name_table, n, cur + 1, len + 1 );
        if ( error )
          goto Fail;

        /* add a trailing zero to the name table */
        name_table->elements[n][len] = '\0';

        /* record index of /.notdef              */
        if ( strcmp( (const char*)".notdef",
                     (const char*)(name_table->elements[n]) ) == 0 )
        {
          notdef_index = n;
          notdef_found = 1;
        }

        parser->root.cursor = cur2;
        if ( !read_binary_data( parser, &size, &base ) )
          return;

        if ( face->type1.private_dict.lenIV >= 0 )
        {
          psaux->t1_decrypt( base, size, 4330 );
          size -= face->type1.private_dict.lenIV;
          base += face->type1.private_dict.lenIV;
        }

        error = T1_Add_Table( code_table, n, base, size );
        if ( error )
          goto Fail;