sfobjs.c

qt-embedded-2.3.8.tar.gz源码

      else
        goto Exit;
    }
#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */

    if ( LOAD_( hdmx )    ||
         LOAD_( gasp )    ||
         LOAD_( kerning ) ||
         LOAD_( pclt )    )
      goto Exit;

#ifdef TT_CONFIG_OPTION_EXTEND_ENGINE
    if ( ( error = TT_Extension_Create( face ) ) != TT_Err_Ok )
      goto Exit;
#endif

    face->root.family_name = Get_Name( face, TT_NAME_ID_FONT_FAMILY );
    face->root.style_name  = Get_Name( face, TT_NAME_ID_FONT_SUBFAMILY );

    /* now set up root fields */
    {
      FT_Face     root = &face->root;
      FT_Int      flags = 0;
      TT_CharMap  charmap;
      FT_Int      n;
      FT_Memory   memory;


      memory = root->memory;

      /*********************************************************************/
      /*                                                                   */
      /* Compute face flags.                                               */
      /*                                                                   */
      if ( has_outline == TRUE )
        flags = FT_FACE_FLAG_SCALABLE;    /* scalable outlines */

      flags |= FT_FACE_FLAG_SFNT      |   /* SFNT file format  */
               FT_FACE_FLAG_HORIZONTAL;   /* horizontal data   */

#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
      /* might need more polish to detect the presence of a Postscript */
      /* name table in the font                                        */
      flags |= FT_FACE_FLAG_GLYPH_NAMES;
#endif

      /* fixed width font? */
      if ( face->postscript.isFixedPitch )
        flags |= FT_FACE_FLAG_FIXED_WIDTH;

      /* vertical information? */
      if ( face->vertical_info )
        flags |= FT_FACE_FLAG_VERTICAL;

      /* kerning available ? */
      if ( face->kern_pairs )
        flags |= FT_FACE_FLAG_KERNING;

      root->face_flags = flags;

      /*********************************************************************/
      /*                                                                   */
      /* Compute style flags.                                              */
      /*                                                                   */
      flags = 0;
      if ( has_outline == TRUE && face->os2.version != 0xFFFF )
      {
        /* we have an OS/2 table; use the `fsSelection' field */
        if ( face->os2.fsSelection & 1 )
          flags |= FT_STYLE_FLAG_ITALIC;

        if ( face->os2.fsSelection & 32 )
          flags |= FT_STYLE_FLAG_BOLD;
      }
      else
      {
        /* this is an old Mac font, use the header field */
        if ( face->header.Mac_Style & 1 )
          flags |= FT_STYLE_FLAG_BOLD;

        if ( face->header.Mac_Style & 2 )
          flags |= FT_STYLE_FLAG_ITALIC;
      }

      root->style_flags = flags;

      /*********************************************************************/
      /*                                                                   */
      /* Polish the charmaps.                                              */
      /*                                                                   */
      /*   Try to set the charmap encoding according to the platform &     */
      /*   encoding ID of each charmap.                                    */
      /*                                                                   */
      charmap            = face->charmaps;
      root->num_charmaps = face->num_charmaps;

      /* allocate table of pointers */
      if ( ALLOC_ARRAY( root->charmaps, root->num_charmaps, FT_CharMap ) )
        goto Exit;

      for ( n = 0; n < root->num_charmaps; n++, charmap++ )
      {
        FT_Int  platform = charmap->cmap.platformID;
        FT_Int  encoding = charmap->cmap.platformEncodingID;


        charmap->root.face        = (FT_Face)face;
        charmap->root.platform_id = platform;
        charmap->root.encoding_id = encoding;
        charmap->root.encoding    = find_encoding( platform, encoding );

        /* now, set root->charmap with a unicode charmap */
        /* wherever available                            */
        if ( !root->charmap                                &&
             charmap->root.encoding == ft_encoding_unicode )
          root->charmap = (FT_CharMap)charmap;

        root->charmaps[n] = (FT_CharMap)charmap;
      }

#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS

      if ( face->num_sbit_strikes )
      {
        root->face_flags |= FT_FACE_FLAG_FIXED_SIZES;

#if 0
        /* I don't know criteria whether layout is horizontal or vertical */
        if ( has_outline.... )
        {
          ...
          root->face_flags |= FT_FACE_FLAG_VERTICAL;
        }
#endif
        root->num_fixed_sizes = face->num_sbit_strikes;

        if ( ALLOC_ARRAY( root->available_sizes,
                          face->num_sbit_strikes,
                          FT_Bitmap_Size ) )
          goto Exit;

        for ( n = 0 ; n < face->num_sbit_strikes ; n++ )
        {
          root->available_sizes[n].width =
            face->sbit_strikes[n].x_ppem;

          root->available_sizes[n].height =
            face->sbit_strikes[n].y_ppem;
        }
      }
      else

#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */

      {
        root->num_fixed_sizes = 0;
        root->available_sizes = 0;
      }

      /*********************************************************************/
      /*                                                                   */
      /*  Set up metrics.                                                  */
      /*                                                                   */
      if ( has_outline == TRUE )
      {
        /* XXX What about if outline header is missing */
        /*     (e.g. sfnt wrapped outline)?            */
        root->bbox.xMin    = face->header.xMin;
        root->bbox.yMin    = face->header.yMin;
        root->bbox.xMax    = face->header.xMax;
        root->bbox.yMax    = face->header.yMax;
        root->units_per_EM = face->header.Units_Per_EM;


        /* XXX: Computing the ascender/descender/height is very different */
        /*      from what the specification tells you.  Apparently, we    */
        /*      must be careful because                                   */
        /*                                                                */
        /*      - not all fonts have an OS/2 table; in this case, we take */
        /*        the values in the horizontal header.  However, these    */
        /*        values very often are not reliable.                     */
        /*                                                                */
        /*      - otherwise, the correct typographic values are in the    */
        /*        sTypoAscender, sTypoDescender & sTypoLineGap fields.    */
        /*                                                                */
        /*        However, certains fonts have these fields set to 0.     */
        /*        Rather, they have usWinAscent & usWinDescent correctly  */
        /*        set (but with different values).                        */
        /*                                                                */
        /*      As an example, Arial Narrow is implemented through four   */
        /*      files ARIALN.TTF, ARIALNI.TTF, ARIALNB.TTF & ARIALNBI.TTF */
        /*                                                                */
        /*      Strangely, all fonts have the same values in their        */
        /*      sTypoXXX fields, except ARIALNB which sets them to 0.     */
        /*                                                                */
        /*      On the other hand, they all have different                */
        /*      usWinAscent/Descent values -- as a conclusion, the OS/2   */
        /*      table cannot be used to compute the text height reliably! */
        /*                                                                */

        /* The ascender/descender/height are computed from the OS/2 table */
        /* when found.  Otherwise, they're taken from the horizontal      */
        /* header.                                                        */
        /*                                                                */

        root->ascender  = face->horizontal.Ascender;
        root->descender = face->horizontal.Descender;

        root->height    = root->ascender - root->descender +
                          face->horizontal.Line_Gap;

        /* if the line_gap is 0, we add an extra 15% to the text height --  */
        /* this computation is based on various versions of Times New Roman */
        if ( face->horizontal.Line_Gap == 0 )
          root->height = ( root->height * 115 + 50 ) / 100;

#if 0

        /* some fonts have the OS/2 "sTypoAscender", "sTypoDescender" & */
        /* "sTypoLineGap" fields set to 0, like ARIALNB.TTF             */
        if ( face->os2.version != 0xFFFF && root->ascender )
        {
          FT_Int  height;


          root->ascender  =  face->os2.sTypoAscender;
          root->descender = -face->os2.sTypoDescender;

          height = root->ascender + root->descender + face->os2.sTypoLineGap;
          if ( height > root->height )
            root->height = height;
        }

#endif /* 0 */

        root->max_advance_width   = face->horizontal.advance_Width_Max;

        root->max_advance_height  = face->vertical_info
                                      ? face->vertical.advance_Height_Max
                                      : root->height;

        root->underline_position  = face->postscript.underlinePosition;
        root->underline_thickness = face->postscript.underlineThickness;

        /* root->max_points   -- already set up */
        /* root->max_contours -- already set up */
      }
    }

  Exit:
    return error;
  }


#undef LOAD_


  FT_LOCAL_DEF
  void  SFNT_Done_Face( TT_Face  face )
  {
    FT_Memory        memory = face->root.memory;
    SFNT_Interface*  sfnt   = (SFNT_Interface*)face->sfnt;


    if ( sfnt )
    {
      /* destroy the postscript names table if it is loaded */
      if ( sfnt->free_psnames )
        sfnt->free_psnames( face );

      /* destroy the embedded bitmaps table if it is loaded */
      if ( sfnt->free_sbits )
        sfnt->free_sbits( face );
    }

    /* freeing the kerning table */
    FREE( face->kern_pairs );
    face->num_kern_pairs = 0;

    /* freeing the collection table */
    FREE( face->ttc_header.offsets );
    face->ttc_header.count = 0;

    /* freeing table directory */
    FREE( face->dir_tables );
    face->num_tables = 0;

    /* freeing the character mapping tables */
    if ( sfnt && sfnt->load_charmaps )
    {
      FT_UShort  n;


      for ( n = 0; n < face->num_charmaps; n++ )
        sfnt->free_charmap( face, &face->charmaps[n].cmap );
    }

    FREE( face->charmaps );
    face->num_charmaps = 0;

    FREE( face->root.charmaps );
    face->root.num_charmaps = 0;
    face->root.charmap      = 0;

    /* freeing the horizontal metrics */
    FREE( face->horizontal.long_metrics );
    FREE( face->horizontal.short_metrics );

    /* freeing the vertical ones, if any */
    if ( face->vertical_info )
    {
      FREE( face->vertical.long_metrics  );
      FREE( face->vertical.short_metrics );
      face->vertical_info = 0;
    }

    /* freeing the gasp table */
    FREE( face->gasp.gaspRanges );
    face->gasp.numRanges = 0;

    /* freeing the name table */
    sfnt->free_names( face );

    /* freeing the hdmx table */
    sfnt->free_hdmx( face );

    /* freeing family and style name */
    FREE( face->root.family_name );
    FREE( face->root.style_name );

    /* freeing sbit size table */
    face->root.num_fixed_sizes = 0;
    if ( face->root.available_sizes )
      FREE( face->root.available_sizes );

    face->sfnt = 0;
  }


/* END */