C++ FT_THROW函数代码示例

  FT_Outline_EmboldenXY( FT_Outline*  outline,
                         FT_Pos       xstrength,
                         FT_Pos       ystrength )
  {
    FT_Vector*  points;
    FT_Int      c, first, last;
    FT_Int      orientation;


    if ( !outline )
      return FT_THROW( Invalid_Outline );

    xstrength /= 2;
    ystrength /= 2;
    if ( xstrength == 0 && ystrength == 0 )
      return FT_Err_Ok;

    orientation = FT_Outline_Get_Orientation( outline );
    if ( orientation == FT_ORIENTATION_NONE )
    {
      if ( outline->n_contours )
        return FT_THROW( Invalid_Argument );
      else
        return FT_Err_Ok;
    }

    points = outline->points;

    first = 0;
    for ( c = 0; c < outline->n_contours; c++ )
    {
      FT_Vector  in, out, anchor, shift;
      FT_Fixed   l_in, l_out, l_anchor = 0, l, q, d;
      FT_Int     i, j, k;


      l_in = 0;
      last = outline->contours[c];

      /* pacify compiler */
      in.x = in.y = anchor.x = anchor.y = 0;

      /* Counter j cycles though the points; counter i advances only  */
      /* when points are moved; anchor k marks the first moved point. */
      for ( i = last, j = first, k = -1;
            j != i && i != k;
            j = j < last ? j + 1 : first )
      {
        if ( j != k )
        {
          out.x = points[j].x - points[i].x;
          out.y = points[j].y - points[i].y;
          l_out = (FT_Fixed)FT_Vector_NormLen( &out );

          if ( l_out == 0 )
            continue;
        }
        else
        {
          out   = anchor;
          l_out = l_anchor;
        }

        if ( l_in != 0 )
        {
          if ( k < 0 )
          {
            k        = i;
            anchor   = in;
            l_anchor = l_in;
          }

          d = FT_MulFix( in.x, out.x ) + FT_MulFix( in.y, out.y );

          /* shift only if turn is less than ~160 degrees */
          if ( d > -0xF000L )
          {
            d = d + 0x10000L;

            /* shift components along lateral bisector in proper orientation */
            shift.x = in.y + out.y;
            shift.y = in.x + out.x;

            if ( orientation == FT_ORIENTATION_TRUETYPE )
              shift.x = -shift.x;
            else
              shift.y = -shift.y;

            /* restrict shift magnitude to better handle collapsing segments */
            q = FT_MulFix( out.x, in.y ) - FT_MulFix( out.y, in.x );
            if ( orientation == FT_ORIENTATION_TRUETYPE )
              q = -q;

            l = FT_MIN( l_in, l_out );

            /* non-strict inequalities avoid divide-by-zero when q == l == 0 */
            if ( FT_MulFix( xstrength, q ) <= FT_MulFix( l, d ) )
              shift.x = FT_MulDiv( shift.x, xstrength, d );
            else
              shift.x = FT_MulDiv( shift.x, l, q );
//.........这里部分代码省略.........

  FT_Stream_Open( FT_Stream    stream,
                  const char*  filepathname )
  {
    int          file;
    struct stat  stat_buf;


    if ( !stream )
      return FT_THROW( Invalid_Stream_Handle );

    /* open the file */
    file = open( filepathname, O_RDONLY );
    if ( file < 0 )
    {
      FT_ERROR(( "FT_Stream_Open:" ));
      FT_ERROR(( " could not open `%s'\n", filepathname ));
      return FT_THROW( Cannot_Open_Resource );
    }

    /* Here we ensure that a "fork" will _not_ duplicate   */
    /* our opened input streams on Unix.  This is critical */
    /* since it avoids some (possible) access control      */
    /* issues and cleans up the kernel file table a bit.   */
    /*                                                     */
#ifdef F_SETFD
#ifdef FD_CLOEXEC
    (void)fcntl( file, F_SETFD, FD_CLOEXEC );
#else
    (void)fcntl( file, F_SETFD, 1 );
#endif /* FD_CLOEXEC */
#endif /* F_SETFD */

    if ( fstat( file, &stat_buf ) < 0 )
    {
      FT_ERROR(( "FT_Stream_Open:" ));
      FT_ERROR(( " could not `fstat' file `%s'\n", filepathname ));
      goto Fail_Map;
    }

    /* XXX: TODO -- real 64bit platform support                        */
    /*                                                                 */
    /* `stream->size' is typedef'd to unsigned long (in `ftsystem.h'); */
    /* `stat_buf.st_size', however, is usually typedef'd to off_t      */
    /* (in sys/stat.h).                                                */
    /* On some platforms, the former is 32bit and the latter is 64bit. */
    /* To avoid overflow caused by fonts in huge files larger than     */
    /* 2GB, do a test.  Temporary fix proposed by Sean McBride.        */
    /*                                                                 */
    if ( stat_buf.st_size > LONG_MAX )
    {
      FT_ERROR(( "FT_Stream_Open: file is too big\n" ));
      goto Fail_Map;
    }
    else if ( stat_buf.st_size == 0 )
    {
      FT_ERROR(( "FT_Stream_Open: zero-length file\n" ));
      goto Fail_Map;
    }

    /* This cast potentially truncates a 64bit to 32bit! */
    stream->size = (unsigned long)stat_buf.st_size;
    stream->pos  = 0;
    stream->base = (unsigned char *)mmap( NULL,
                                          stream->size,
                                          PROT_READ,
                                          MAP_FILE | MAP_PRIVATE,
                                          file,
                                          0 );

    /* on some RTOS, mmap might return 0 */
    if ( (long)stream->base != -1 && stream->base != NULL )
      stream->close = ft_close_stream_by_munmap;
    else
    {
      ssize_t  total_read_count;


      FT_ERROR(( "FT_Stream_Open:" ));
      FT_ERROR(( " could not `mmap' file `%s'\n", filepathname ));

      stream->base = (unsigned char*)ft_alloc( NULL, stream->size );

      if ( !stream->base )
      {
        FT_ERROR(( "FT_Stream_Open:" ));
        FT_ERROR(( " could not `alloc' memory\n" ));
        goto Fail_Map;
      }

      total_read_count = 0;
      do
      {
        ssize_t  read_count;


        read_count = read( file,
                           stream->base + total_read_count,
                           stream->size - total_read_count );

        if ( read_count <= 0 )
//.........这里部分代码省略.........

  FT_Get_Glyph( FT_GlyphSlot  slot,
                FT_Glyph     *aglyph )
  {
    FT_Library  library;
    FT_Error    error;
    FT_Glyph    glyph;

    const FT_Glyph_Class*  clazz = NULL;


    if ( !slot )
      return FT_THROW( Invalid_Slot_Handle );

    library = slot->library;

    if ( !aglyph )
      return FT_THROW( Invalid_Argument );

    /* if it is a bitmap, that's easy :-) */
    if ( slot->format == FT_GLYPH_FORMAT_BITMAP )
      clazz = FT_BITMAP_GLYPH_CLASS_GET;

    /* if it is an outline */
    else if ( slot->format == FT_GLYPH_FORMAT_OUTLINE )
      clazz = FT_OUTLINE_GLYPH_CLASS_GET;

    else
    {
      /* try to find a renderer that supports the glyph image format */
      FT_Renderer  render = FT_Lookup_Renderer( library, slot->format, 0 );


      if ( render )
        clazz = &render->glyph_class;
    }

    if ( !clazz )
    {
      error = FT_THROW( Invalid_Glyph_Format );
      goto Exit;
    }

    /* create FT_Glyph object */
    error = ft_new_glyph( library, clazz, &glyph );
    if ( error )
      goto Exit;

    /* copy advance while converting 26.6 to 16.16 format */
    glyph->advance.x = slot->advance.x * 1024;
    glyph->advance.y = slot->advance.y * 1024;

    /* now import the image from the glyph slot */
    error = clazz->glyph_init( glyph, slot );

    /* if an error occurred, destroy the glyph */
    if ( error )
      FT_Done_Glyph( glyph );
    else
      *aglyph = glyph;

  Exit:
    return error;
  }

  /* check and skip .gz header - we don't support `transparent' compression */
  static FT_Error
  ft_gzip_check_header( FT_Stream  stream )
  {
    FT_Error  error;
    FT_Byte   head[4];


    if ( FT_STREAM_SEEK( 0 )       ||
         FT_STREAM_READ( head, 4 ) )
      goto Exit;

    /* head[0] && head[1] are the magic numbers;    */
    /* head[2] is the method, and head[3] the flags */
    if ( head[0] != 0x1f              ||
         head[1] != 0x8b              ||
         head[2] != Z_DEFLATED        ||
        (head[3] & FT_GZIP_RESERVED)  )
    {
      error = FT_THROW( Invalid_File_Format );
      goto Exit;
    }

    /* skip time, xflags and os code */
    (void)FT_STREAM_SKIP( 6 );

    /* skip the extra field */
    if ( head[3] & FT_GZIP_EXTRA_FIELD )
    {
      FT_UInt  len;


      if ( FT_READ_USHORT_LE( len ) ||
           FT_STREAM_SKIP( len )    )
        goto Exit;
    }

    /* skip original file name */
    if ( head[3] & FT_GZIP_ORIG_NAME )
      for (;;)
      {
        FT_UInt  c;


        if ( FT_READ_BYTE( c ) )
          goto Exit;

        if ( c == 0 )
          break;
      }

    /* skip .gz comment */
    if ( head[3] & FT_GZIP_COMMENT )
      for (;;)
      {
        FT_UInt  c;


        if ( FT_READ_BYTE( c ) )
          goto Exit;

        if ( c == 0 )
          break;
      }

    /* skip CRC */
    if ( head[3] & FT_GZIP_HEAD_CRC )
      if ( FT_STREAM_SKIP( 2 ) )
        goto Exit;

  Exit:
    return error;
  }

  FT_Stream_ReadFields( FT_Stream              stream,
                        const FT_Frame_Field*  fields,
                        void*                  structure )
  {
    FT_Error  error;
    FT_Bool   frame_accessed = 0;
    FT_Byte*  cursor;


    if ( !fields )
      return FT_THROW( Invalid_Argument );

    if ( !stream )
      return FT_THROW( Invalid_Stream_Handle );

    cursor = stream->cursor;

    error = FT_Err_Ok;
    do
    {
      FT_ULong  value;
      FT_Int    sign_shift;
      FT_Byte*  p;


      switch ( fields->value )
      {
      case ft_frame_start:  /* access a new frame */
        error = FT_Stream_EnterFrame( stream, fields->offset );
        if ( error )
          goto Exit;

        frame_accessed = 1;
        cursor         = stream->cursor;
        fields++;
        continue;  /* loop! */

      case ft_frame_bytes:  /* read a byte sequence */
      case ft_frame_skip:   /* skip some bytes      */
        {
          FT_UInt  len = fields->size;


          if ( cursor + len > stream->limit )
          {
            error = FT_THROW( Invalid_Stream_Operation );
            goto Exit;
          }

          if ( fields->value == ft_frame_bytes )
          {
            p = (FT_Byte*)structure + fields->offset;
            FT_MEM_COPY( p, cursor, len );
          }
          cursor += len;
          fields++;
          continue;
        }

      case ft_frame_byte:
      case ft_frame_schar:  /* read a single byte */
        value = FT_NEXT_BYTE( cursor );
        sign_shift = 24;
        break;

      case ft_frame_short_be:
      case ft_frame_ushort_be:  /* read a 2-byte big-endian short */
        value = FT_NEXT_USHORT( cursor) ;
        sign_shift = 16;
        break;

      case ft_frame_short_le:
      case ft_frame_ushort_le:  /* read a 2-byte little-endian short */
        value = FT_NEXT_USHORT_LE( cursor );
        sign_shift = 16;
        break;

      case ft_frame_long_be:
      case ft_frame_ulong_be:  /* read a 4-byte big-endian long */
        value = FT_NEXT_ULONG( cursor );
        sign_shift = 0;
        break;

      case ft_frame_long_le:
      case ft_frame_ulong_le:  /* read a 4-byte little-endian long */
        value = FT_NEXT_ULONG_LE( cursor );
        sign_shift = 0;
        break;

      case ft_frame_off3_be:
      case ft_frame_uoff3_be:  /* read a 3-byte big-endian long */
        value = FT_NEXT_UOFF3( cursor );
        sign_shift = 8;
        break;

      case ft_frame_off3_le:
      case ft_frame_uoff3_le:  /* read a 3-byte little-endian long */
        value = FT_NEXT_UOFF3_LE( cursor );
        sign_shift = 8;
        break;
//.........这里部分代码省略.........

  /*
   * This function tries to load a small bitmap within a given FTC_SNode.
   * Note that it returns a non-zero error code _only_ in the case of
   * out-of-memory condition.  For all other errors (e.g., corresponding
   * to a bad font file), this function will mark the sbit as `unavailable'
   * and return a value of 0.
   *
   * You should also read the comment within the @ftc_snode_compare
   * function below to see how out-of-memory is handled during a lookup.
   */
  static FT_Error
  ftc_snode_load( FTC_SNode    snode,
                  FTC_Manager  manager,
                  FT_UInt      gindex,
                  FT_ULong    *asize )
  {
    FT_Error          error;
    FTC_GNode         gnode  = FTC_GNODE( snode );
    FTC_Family        family = gnode->family;
    FT_Memory         memory = manager->memory;
    FT_Face           face;
    FTC_SBit          sbit;
    FTC_SFamilyClass  clazz;


    if ( (FT_UInt)(gindex - gnode->gindex) >= snode->count )
    {
      FT_ERROR(( "ftc_snode_load: invalid glyph index" ));
      return FT_THROW( Invalid_Argument );
    }

    sbit  = snode->sbits + ( gindex - gnode->gindex );
    clazz = (FTC_SFamilyClass)family->clazz;

    sbit->buffer = 0;

    error = clazz->family_load_glyph( family, gindex, manager, &face );
    if ( error )
      goto BadGlyph;

    {
      FT_Int        temp;
      FT_GlyphSlot  slot   = face->glyph;
      FT_Bitmap*    bitmap = &slot->bitmap;
      FT_Pos        xadvance, yadvance; /* FT_GlyphSlot->advance.{x|y} */


      if ( slot->format != FT_GLYPH_FORMAT_BITMAP )
      {
        FT_TRACE0(( "ftc_snode_load:"
                    " glyph loaded didn't return a bitmap\n" ));
        goto BadGlyph;
      }

      /* Check whether our values fit into 8-bit containers!    */
      /* If this is not the case, our bitmap is too large       */
      /* and we will leave it as `missing' with sbit.buffer = 0 */

#define CHECK_CHAR( d )  ( temp = (FT_Char)d, (FT_Int) temp == (FT_Int) d )
#define CHECK_BYTE( d )  ( temp = (FT_Byte)d, (FT_UInt)temp == (FT_UInt)d )

      /* horizontal advance in pixels */
      xadvance = ( slot->advance.x + 32 ) >> 6;
      yadvance = ( slot->advance.y + 32 ) >> 6;

      if ( !CHECK_BYTE( bitmap->rows  )     ||
           !CHECK_BYTE( bitmap->width )     ||
           !CHECK_CHAR( bitmap->pitch )     ||
           !CHECK_CHAR( slot->bitmap_left ) ||
           !CHECK_CHAR( slot->bitmap_top  ) ||
           !CHECK_CHAR( xadvance )          ||
           !CHECK_CHAR( yadvance )          )
      {
        FT_TRACE2(( "ftc_snode_load:"
                    " glyph too large for small bitmap cache\n"));
        goto BadGlyph;
      }

      sbit->width     = (FT_Byte)bitmap->width;
      sbit->height    = (FT_Byte)bitmap->rows;
      sbit->pitch     = (FT_Char)bitmap->pitch;
      sbit->left      = (FT_Char)slot->bitmap_left;
      sbit->top       = (FT_Char)slot->bitmap_top;
      sbit->xadvance  = (FT_Char)xadvance;
      sbit->yadvance  = (FT_Char)yadvance;
      sbit->format    = (FT_Byte)bitmap->pixel_mode;
      sbit->max_grays = (FT_Byte)(bitmap->num_grays - 1);

      /* copy the bitmap into a new buffer -- ignore error */
      error = ftc_sbit_copy_bitmap( sbit, bitmap, memory );

      /* now, compute size */
      if ( asize )
        *asize = (FT_ULong)FT_ABS( sbit->pitch ) * sbit->height;

    } /* glyph loading successful */

    /* ignore the errors that might have occurred --   */
    /* we mark unloaded glyphs with `sbit.buffer == 0' */
    /* and `width == 255', `height == 0'               */
//.........这里部分代码省略.........

  /* Create a new FT_Face from an SFNT resource, specified by res ID. */
  static FT_Error
  FT_New_Face_From_SFNT( FT_Library  library,
                         ResID       sfnt_id,
                         FT_Long     face_index,
                         FT_Face*    aface )
  {
    Handle     sfnt = NULL;
    FT_Byte*   sfnt_data;
    size_t     sfnt_size;
    FT_Error   error  = FT_Err_Ok;
    FT_Memory  memory = library->memory;
    int        is_cff, is_sfnt_ps;


    sfnt = GetResource( TTAG_sfnt, sfnt_id );
    if ( sfnt == NULL )
      return FT_THROW( Invalid_Handle );

    sfnt_size = (FT_ULong)GetHandleSize( sfnt );
    if ( FT_ALLOC( sfnt_data, (FT_Long)sfnt_size ) )
    {
      ReleaseResource( sfnt );
      return error;
    }

    ft_memcpy( sfnt_data, *sfnt, sfnt_size );
    ReleaseResource( sfnt );

    is_cff     = sfnt_size > 4 && !ft_memcmp( sfnt_data, "OTTO", 4 );
    is_sfnt_ps = sfnt_size > 4 && !ft_memcmp( sfnt_data, "typ1", 4 );

    if ( is_sfnt_ps )
    {
      FT_Stream  stream;


      if ( FT_NEW( stream ) )
        goto Try_OpenType;

      FT_Stream_OpenMemory( stream, sfnt_data, sfnt_size );
      if ( !open_face_PS_from_sfnt_stream( library,
                                           stream,
                                           face_index,
                                           0, NULL,
                                           aface ) )
      {
        FT_Stream_Close( stream );
        FT_FREE( stream );
        FT_FREE( sfnt_data );
        goto Exit;
      }

      FT_FREE( stream );
    }
  Try_OpenType:
    error = open_face_from_buffer( library,
                                   sfnt_data,
                                   sfnt_size,
                                   face_index,
                                   is_cff ? "cff" : "truetype",
                                   aface );
  Exit:
    return error;
  }

  static FT_Error
  load_format_25( TT_Face    face,
                  FT_Stream  stream,
                  FT_ULong   post_limit )
  {
    FT_Memory  memory = stream->memory;
    FT_Error   error;

    FT_Int     num_glyphs;
    FT_Char*   offset_table = NULL;

    FT_UNUSED( post_limit );


    /* UNDOCUMENTED!  This value appears only in the Apple TT specs. */
    if ( FT_READ_USHORT( num_glyphs ) )
      goto Exit;

    /* check the number of glyphs */
    if ( num_glyphs > face->max_profile.numGlyphs || num_glyphs > 258 )
    {
      error = FT_THROW( Invalid_File_Format );
      goto Exit;
    }

    if ( FT_NEW_ARRAY( offset_table, num_glyphs )   ||
         FT_STREAM_READ( offset_table, num_glyphs ) )
      goto Fail;

    /* now check the offset table */
    {
      FT_Int  n;


      for ( n = 0; n < num_glyphs; n++ )
      {
        FT_Long  idx = (FT_Long)n + offset_table[n];


        if ( idx < 0 || idx > num_glyphs )
        {
          error = FT_THROW( Invalid_File_Format );
          goto Fail;
        }
      }
    }

    /* OK, set table fields and exit successfully */
    {
      TT_Post_25  table = &face->postscript_names.names.format_25;


      table->num_glyphs = (FT_UShort)num_glyphs;
      table->offsets    = offset_table;
    }

    return FT_Err_Ok;

  Fail:
    FT_FREE( offset_table );

  Exit:
    return error;
  }

  tt_face_get_ps_name( TT_Face      face,
                       FT_UInt      idx,
                       FT_String**  PSname )
  {
    FT_Error       error;
    TT_Post_Names  names;
    FT_Fixed       format;

#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
    FT_Service_PsCMaps  psnames;
#endif


    if ( !face )
      return FT_THROW( Invalid_Face_Handle );

    if ( idx >= (FT_UInt)face->max_profile.numGlyphs )
      return FT_THROW( Invalid_Glyph_Index );

#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
    psnames = (FT_Service_PsCMaps)face->psnames;
    if ( !psnames )
      return FT_THROW( Unimplemented_Feature );
#endif

    names = &face->postscript_names;

    /* `.notdef' by default */
    *PSname = MAC_NAME( 0 );

    format = face->postscript.FormatType;

    if ( format == 0x00010000L )
    {
      if ( idx < 258 )                    /* paranoid checking */
        *PSname = MAC_NAME( idx );
    }
    else if ( format == 0x00020000L )
    {
      TT_Post_20  table = &names->names.format_20;


      if ( !names->loaded )
      {
        error = load_post_names( face );
        if ( error )
          goto End;
      }

      if ( idx < (FT_UInt)table->num_glyphs )
      {
        FT_UShort  name_index = table->glyph_indices[idx];


        if ( name_index < 258 )
          *PSname = MAC_NAME( name_index );
        else
          *PSname = (FT_String*)table->glyph_names[name_index - 258];
      }
    }
    else if ( format == 0x00028000L )
    {
      TT_Post_25  table = &names->names.format_25;


      if ( !names->loaded )
      {
        error = load_post_names( face );
        if ( error )
          goto End;
      }

      if ( idx < (FT_UInt)table->num_glyphs )    /* paranoid checking */
        *PSname = MAC_NAME( (FT_Int)idx + table->offsets[idx] );
    }

    /* nothing to do for format == 0x00030000L */

  End:
    return FT_Err_Ok;
  }

//.........这里部分代码省略.........
    {
      FT_UInt  n, count;


      PFR_CHECK( 1 );
      phy_font->num_blue_values = count = PFR_NEXT_BYTE( p );

      PFR_CHECK( count * 2 );

      if ( FT_NEW_ARRAY( phy_font->blue_values, count ) )
        goto Fail;

      for ( n = 0; n < count; n++ )
        phy_font->blue_values[n] = PFR_NEXT_SHORT( p );
    }

    PFR_CHECK( 8 );
    phy_font->blue_fuzz  = PFR_NEXT_BYTE( p );
    phy_font->blue_scale = PFR_NEXT_BYTE( p );

    phy_font->vertical.standard   = PFR_NEXT_USHORT( p );
    phy_font->horizontal.standard = PFR_NEXT_USHORT( p );

    /* read the character descriptors */
    {
      FT_UInt  n, count, Size;


      phy_font->num_chars    = count = PFR_NEXT_USHORT( p );
      phy_font->chars_offset = offset + (FT_Offset)( p - stream->cursor );

      Size = 1 + 1 + 2;
      if ( flags & PFR_PHY_2BYTE_CHARCODE )
        Size += 1;

      if ( flags & PFR_PHY_PROPORTIONAL )
        Size += 2;

      if ( flags & PFR_PHY_ASCII_CODE )
        Size += 1;

      if ( flags & PFR_PHY_2BYTE_GPS_SIZE )
        Size += 1;

      if ( flags & PFR_PHY_3BYTE_GPS_OFFSET )
        Size += 1;

      PFR_CHECK_SIZE( count * Size );

      if ( FT_NEW_ARRAY( phy_font->chars, count ) )
        goto Fail;

      for ( n = 0; n < count; n++ )
      {
        PFR_Char  cur = &phy_font->chars[n];


        cur->char_code = ( flags & PFR_PHY_2BYTE_CHARCODE )
                         ? PFR_NEXT_USHORT( p )
                         : PFR_NEXT_BYTE( p );

        cur->advance   = ( flags & PFR_PHY_PROPORTIONAL )
                         ? PFR_NEXT_SHORT( p )
                         : phy_font->standard_advance;

#if 0
        cur->ascii     = ( flags & PFR_PHY_ASCII_CODE )
                         ? PFR_NEXT_BYTE( p )
                         : 0;
#else
        if ( flags & PFR_PHY_ASCII_CODE )
          p += 1;
#endif
        cur->gps_size  = ( flags & PFR_PHY_2BYTE_GPS_SIZE )
                         ? PFR_NEXT_USHORT( p )
                         : PFR_NEXT_BYTE( p );

        cur->gps_offset = ( flags & PFR_PHY_3BYTE_GPS_OFFSET )
                          ? PFR_NEXT_ULONG( p )
                          : PFR_NEXT_USHORT( p );
      }
    }

    /* that's it! */

  Fail:
    FT_FRAME_EXIT();

    /* save position of bitmap info */
    phy_font->bct_offset = FT_STREAM_POS();
    phy_font->cursor     = NULL;

  Exit:
    return error;

  Too_Short:
    error = FT_THROW( Invalid_Table );
    FT_ERROR(( "pfr_phy_font_load: invalid physical font table\n" ));
    goto Fail;
  }

  static FT_Error
  load_format_20( TT_Face    face,
                  FT_Stream  stream,
                  FT_ULong   post_limit )
  {
    FT_Memory   memory = stream->memory;
    FT_Error    error;

    FT_Int      num_glyphs;
    FT_UShort   num_names;

    FT_UShort*  glyph_indices = NULL;
    FT_Char**   name_strings  = NULL;


    if ( FT_READ_USHORT( num_glyphs ) )
      goto Exit;

    /* UNDOCUMENTED!  The number of glyphs in this table can be smaller */
    /* than the value in the maxp table (cf. cyberbit.ttf).             */

    /* There already exist fonts which have more than 32768 glyph names */
    /* in this table, so the test for this threshold has been dropped.  */

    if ( num_glyphs > face->max_profile.numGlyphs )
    {
      error = FT_THROW( Invalid_File_Format );
      goto Exit;
    }

    /* load the indices */
    {
      FT_Int  n;


      if ( FT_NEW_ARRAY ( glyph_indices, num_glyphs ) ||
           FT_FRAME_ENTER( num_glyphs * 2L )          )
        goto Fail;

      for ( n = 0; n < num_glyphs; n++ )
        glyph_indices[n] = FT_GET_USHORT();

      FT_FRAME_EXIT();
    }

    /* compute number of names stored in table */
    {
      FT_Int  n;


      num_names = 0;

      for ( n = 0; n < num_glyphs; n++ )
      {
        FT_Int  idx;


        idx = glyph_indices[n];
        if ( idx >= 258 )
        {
          idx -= 257;
          if ( idx > num_names )
            num_names = (FT_UShort)idx;
        }
      }
    }

    /* now load the name strings */
    {
      FT_UShort  n;


      if ( FT_NEW_ARRAY( name_strings, num_names ) )
        goto Fail;

      for ( n = 0; n < num_names; n++ )
      {
        FT_UInt  len;


        if ( FT_STREAM_POS() >= post_limit )
          break;
        else
        {
          FT_TRACE6(( "load_format_20: %d byte left in post table\n",
                      post_limit - FT_STREAM_POS() ));

          if ( FT_READ_BYTE( len ) )
            goto Fail1;
        }

        if ( len > post_limit                   ||
             FT_STREAM_POS() > post_limit - len )
        {
          FT_Int  d = (FT_Int)post_limit - (FT_Int)FT_STREAM_POS();


          FT_ERROR(( "load_format_20:"
                     " exceeding string length (%d),"
                     " truncating at end of post table (%d byte left)\n",
//.........这里部分代码省略.........

  pfr_extra_item_load_kerning_pairs( FT_Byte*     p,
                                     FT_Byte*     limit,
                                     PFR_PhyFont  phy_font )
  {
    PFR_KernItem  item   = NULL;
    FT_Error      error  = FT_Err_Ok;
    FT_Memory     memory = phy_font->memory;


    if ( FT_NEW( item ) )
      goto Exit;

    PFR_CHECK( 4 );

    item->pair_count = PFR_NEXT_BYTE( p );
    item->base_adj   = PFR_NEXT_SHORT( p );
    item->flags      = PFR_NEXT_BYTE( p );
    item->offset     = phy_font->offset +
                       (FT_Offset)( p - phy_font->cursor );

#ifndef PFR_CONFIG_NO_CHECKS
    item->pair_size = 3;

    if ( item->flags & PFR_KERN_2BYTE_CHAR )
      item->pair_size += 2;

    if ( item->flags & PFR_KERN_2BYTE_ADJ )
      item->pair_size += 1;

    PFR_CHECK( item->pair_count * item->pair_size );
#endif

    /* load first and last pairs into the item to speed up */
    /* lookup later...                                     */
    if ( item->pair_count > 0 )
    {
      FT_UInt   char1, char2;
      FT_Byte*  q;


      if ( item->flags & PFR_KERN_2BYTE_CHAR )
      {
        q     = p;
        char1 = PFR_NEXT_USHORT( q );
        char2 = PFR_NEXT_USHORT( q );

        item->pair1 = PFR_KERN_INDEX( char1, char2 );

        q = p + item->pair_size * ( item->pair_count - 1 );
        char1 = PFR_NEXT_USHORT( q );
        char2 = PFR_NEXT_USHORT( q );

        item->pair2 = PFR_KERN_INDEX( char1, char2 );
      }
      else
      {
        q     = p;
        char1 = PFR_NEXT_BYTE( q );
        char2 = PFR_NEXT_BYTE( q );

        item->pair1 = PFR_KERN_INDEX( char1, char2 );

        q = p + item->pair_size * ( item->pair_count - 1 );
        char1 = PFR_NEXT_BYTE( q );
        char2 = PFR_NEXT_BYTE( q );

        item->pair2 = PFR_KERN_INDEX( char1, char2 );
      }

      /* add new item to the current list */
      item->next                 = NULL;
      *phy_font->kern_items_tail = item;
      phy_font->kern_items_tail  = &item->next;
      phy_font->num_kern_pairs  += item->pair_count;
    }
    else
    {
      /* empty item! */
      FT_FREE( item );
    }

  Exit:
    return error;

  Too_Short:
    FT_FREE( item );

    error = FT_THROW( Invalid_Table );
    FT_ERROR(( "pfr_extra_item_load_kerning_pairs:"
               " invalid kerning pairs table\n" ));
    goto Exit;
  }

  pfr_extra_item_load_bitmap_info( FT_Byte*     p,
                                   FT_Byte*     limit,
                                   PFR_PhyFont  phy_font )
  {
    FT_Memory   memory = phy_font->memory;
    PFR_Strike  strike;
    FT_UInt     flags0;
    FT_UInt     n, count, size1;
    FT_Error    error = FT_Err_Ok;


    PFR_CHECK( 5 );

    p     += 3;  /* skip bctSize */
    flags0 = PFR_NEXT_BYTE( p );
    count  = PFR_NEXT_BYTE( p );

    /* re-allocate when needed */
    if ( phy_font->num_strikes + count > phy_font->max_strikes )
    {
      FT_UInt  new_max = FT_PAD_CEIL( phy_font->num_strikes + count, 4 );


      if ( FT_RENEW_ARRAY( phy_font->strikes,
                           phy_font->num_strikes,
                           new_max ) )
        goto Exit;

      phy_font->max_strikes = new_max;
    }

    size1 = 1 + 1 + 1 + 2 + 2 + 1;
    if ( flags0 & PFR_STRIKE_2BYTE_XPPM )
      size1++;

    if ( flags0 & PFR_STRIKE_2BYTE_YPPM )
      size1++;

    if ( flags0 & PFR_STRIKE_3BYTE_SIZE )
      size1++;

    if ( flags0 & PFR_STRIKE_3BYTE_OFFSET )
      size1++;

    if ( flags0 & PFR_STRIKE_2BYTE_COUNT )
      size1++;

    strike = phy_font->strikes + phy_font->num_strikes;

    PFR_CHECK( count * size1 );

    for ( n = 0; n < count; n++, strike++ )
    {
      strike->x_ppm       = ( flags0 & PFR_STRIKE_2BYTE_XPPM )
                            ? PFR_NEXT_USHORT( p )
                            : PFR_NEXT_BYTE( p );

      strike->y_ppm       = ( flags0 & PFR_STRIKE_2BYTE_YPPM )
                            ? PFR_NEXT_USHORT( p )
                            : PFR_NEXT_BYTE( p );

      strike->flags       = PFR_NEXT_BYTE( p );

      strike->bct_size    = ( flags0 & PFR_STRIKE_3BYTE_SIZE )
                            ? PFR_NEXT_ULONG( p )
                            : PFR_NEXT_USHORT( p );

      strike->bct_offset  = ( flags0 & PFR_STRIKE_3BYTE_OFFSET )
                            ? PFR_NEXT_ULONG( p )
                            : PFR_NEXT_USHORT( p );

      strike->num_bitmaps = ( flags0 & PFR_STRIKE_2BYTE_COUNT )
                            ? PFR_NEXT_USHORT( p )
                            : PFR_NEXT_BYTE( p );
    }

    phy_font->num_strikes += count;

  Exit:
    return error;

  Too_Short:
    error = FT_THROW( Invalid_Table );
    FT_ERROR(( "pfr_extra_item_load_bitmap_info:"
               " invalid bitmap info table\n" ));
    goto Exit;
  }

  pfr_log_font_load( PFR_LogFont  log_font,
                     FT_Stream    stream,
                     FT_UInt      idx,
                     FT_UInt32    section_offset,
                     FT_Bool      size_increment )
  {
    FT_UInt    num_log_fonts;
    FT_UInt    flags;
    FT_UInt32  offset;
    FT_UInt32  size;
    FT_Error   error;


    if ( FT_STREAM_SEEK( section_offset ) ||
         FT_READ_USHORT( num_log_fonts )  )
      goto Exit;

    if ( idx >= num_log_fonts )
      return FT_THROW( Invalid_Argument );

    if ( FT_STREAM_SKIP( idx * 5 ) ||
         FT_READ_USHORT( size )    ||
         FT_READ_UOFF3 ( offset )  )
      goto Exit;

    /* save logical font size and offset */
    log_font->size   = size;
    log_font->offset = offset;

    /* now, check the rest of the table before loading it */
    {
      FT_Byte*  p;
      FT_Byte*  limit;
      FT_UInt   local;


      if ( FT_STREAM_SEEK( offset ) ||
           FT_FRAME_ENTER( size )   )
        goto Exit;

      p     = stream->cursor;
      limit = p + size;

      PFR_CHECK( 13 );

      log_font->matrix[0] = PFR_NEXT_LONG( p );
      log_font->matrix[1] = PFR_NEXT_LONG( p );
      log_font->matrix[2] = PFR_NEXT_LONG( p );
      log_font->matrix[3] = PFR_NEXT_LONG( p );

      flags = PFR_NEXT_BYTE( p );

      local = 0;
      if ( flags & PFR_LOG_STROKE )
      {
        local++;
        if ( flags & PFR_LOG_2BYTE_STROKE )
          local++;

        if ( ( flags & PFR_LINE_JOIN_MASK ) == PFR_LINE_JOIN_MITER )
          local += 3;
      }
      if ( flags & PFR_LOG_BOLD )
      {
        local++;
        if ( flags & PFR_LOG_2BYTE_BOLD )
          local++;
      }

      PFR_CHECK( local );

      if ( flags & PFR_LOG_STROKE )
      {
        log_font->stroke_thickness = ( flags & PFR_LOG_2BYTE_STROKE )
                                     ? PFR_NEXT_SHORT( p )
                                     : PFR_NEXT_BYTE( p );

        if ( ( flags & PFR_LINE_JOIN_MASK ) == PFR_LINE_JOIN_MITER )
          log_font->miter_limit = PFR_NEXT_LONG( p );
      }

      if ( flags & PFR_LOG_BOLD )
      {
        log_font->bold_thickness = ( flags & PFR_LOG_2BYTE_BOLD )
                                   ? PFR_NEXT_SHORT( p )
                                   : PFR_NEXT_BYTE( p );
      }

      if ( flags & PFR_LOG_EXTRA_ITEMS )
      {
        error = pfr_extra_items_skip( &p, limit );
        if ( error )
          goto Fail;
      }

      PFR_CHECK( 5 );
      log_font->phys_size   = PFR_NEXT_USHORT( p );
      log_font->phys_offset = PFR_NEXT_ULONG( p );
      if ( size_increment )
      {
//.........这里部分代码省略.........

  cid_load_glyph( T1_Decoder  decoder,
                  FT_UInt     glyph_index )
  {
    CID_Face       face = (CID_Face)decoder->builder.face;
    CID_FaceInfo   cid  = &face->cid;
    FT_Byte*       p;
    FT_ULong       fd_select;
    FT_Stream      stream       = face->cid_stream;
    FT_Error       error        = FT_Err_Ok;
    FT_Byte*       charstring   = NULL;
    FT_Memory      memory       = face->root.memory;
    FT_ULong       glyph_length = 0;
    PSAux_Service  psaux        = (PSAux_Service)face->psaux;

#ifdef FT_CONFIG_OPTION_INCREMENTAL
    FT_Incremental_InterfaceRec *inc =
                                  face->root.internal->incremental_interface;
#endif


    FT_TRACE1(( "cid_load_glyph: glyph index %d\n", glyph_index ));

#ifdef FT_CONFIG_OPTION_INCREMENTAL

    /* For incremental fonts get the character data using */
    /* the callback function.                             */
    if ( inc )
    {
      FT_Data  glyph_data;


      error = inc->funcs->get_glyph_data( inc->object,
                                          glyph_index, &glyph_data );
      if ( error )
        goto Exit;

      p         = (FT_Byte*)glyph_data.pointer;
      fd_select = cid_get_offset( &p, (FT_Byte)cid->fd_bytes );

      if ( glyph_data.length != 0 )
      {
        glyph_length = (FT_ULong)( glyph_data.length - cid->fd_bytes );
        (void)FT_ALLOC( charstring, glyph_length );
        if ( !error )
          ft_memcpy( charstring, glyph_data.pointer + cid->fd_bytes,
                     glyph_length );
      }

      inc->funcs->free_glyph_data( inc->object, &glyph_data );

      if ( error )
        goto Exit;
    }

    else

#endif /* FT_CONFIG_OPTION_INCREMENTAL */

    /* For ordinary fonts read the CID font dictionary index */
    /* and charstring offset from the CIDMap.                */
    {
      FT_UInt   entry_len = (FT_UInt)( cid->fd_bytes + cid->gd_bytes );
      FT_ULong  off1;


      if ( FT_STREAM_SEEK( cid->data_offset + cid->cidmap_offset +
                           glyph_index * entry_len )               ||
           FT_FRAME_ENTER( 2 * entry_len )                         )
        goto Exit;

      p            = (FT_Byte*)stream->cursor;
      fd_select    = cid_get_offset( &p, (FT_Byte)cid->fd_bytes );
      off1         = cid_get_offset( &p, (FT_Byte)cid->gd_bytes );
      p           += cid->fd_bytes;
      glyph_length = cid_get_offset( &p, (FT_Byte)cid->gd_bytes ) - off1;
      FT_FRAME_EXIT();

      if ( fd_select >= (FT_ULong)cid->num_dicts )
      {
        error = FT_THROW( Invalid_Offset );
        goto Exit;
      }
      if ( glyph_length == 0 )
        goto Exit;
      if ( FT_ALLOC( charstring, glyph_length ) )
        goto Exit;
      if ( FT_STREAM_READ_AT( cid->data_offset + off1,
                              charstring, glyph_length ) )
        goto Exit;
    }

    /* Now set up the subrs array and parse the charstrings. */
    {
      CID_FaceDict  dict;
      CID_Subrs     cid_subrs = face->subrs + fd_select;
      FT_UInt       cs_offset;


      /* Set up subrs */
      decoder->num_subrs = cid_subrs->num_subrs;
//.........这里部分代码省略.........