t2driver.c

qt-embedded-2.3.8.tar.gz源码

    if ( !slot )
      return T2_Err_Invalid_Glyph_Handle;

    /* check whether we want a scaled outline or bitmap */
    if ( !size )
      load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;

    if ( load_flags & FT_LOAD_NO_SCALE )
      size = NULL;

    /* reset the size object if necessary */
    if ( size )
    {
      /* these two object must have the same parent */
      if ( size->face != slot->root.face )
        return T2_Err_Invalid_Face_Handle;
    }

    /* now load the glyph outline if necessary */
    error = T2_Load_Glyph( slot, size, glyph_index, load_flags );

    /* force drop-out mode to 2 - irrelevant now */
    /* slot->outline.dropout_mode = 2; */

    return error;
  }


  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /****                                                                 ****/
  /****                                                                 ****/
  /****             C H A R A C T E R   M A P P I N G S                 ****/
  /****                                                                 ****/
  /****                                                                 ****/
  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/

  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    Get_Char_Index                                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Uses a charmap to return a given character code's glyph index.     */
  /*                                                                       */
  /* <Input>                                                               */
  /*    charmap  :: A handle to the source charmap object.                 */
  /*    charcode :: The character code.                                    */
  /*                                                                       */
  /* <Return>                                                              */
  /*    Glyph index.  0 means `undefined character code'.                  */
  /*                                                                       */
  static
  FT_UInt  t2_get_char_index( TT_CharMap  charmap,
                              FT_Long     charcode )
  {
    FT_Error       error;
    T2_Face        face;
    TT_CMapTable*  cmap;


    cmap = &charmap->cmap;
    face = (T2_Face)charmap->root.face;

    /* Load table if needed */
    if ( !cmap->loaded )
    {
      SFNT_Interface*  sfnt = (SFNT_Interface*)face->sfnt;


      error = sfnt->load_charmap( face, cmap, face->root.stream );
      if ( error )
        return 0;

      cmap->loaded = TRUE;
    }

    return ( cmap->get_index ? cmap->get_index( cmap, charcode ) : 0 );
  }


  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /****                                                                 ****/
  /****                                                                 ****/
  /****                D R I V E R  I N T E R F A C E                   ****/
  /****                                                                 ****/
  /****                                                                 ****/
  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/


  static
  FT_Module_Interface  t2_get_interface( T2_Driver    driver,
                                         const char*  interface )
  {
    FT_Module  sfnt;


    /* we simply pass our request to the `sfnt' module */
    sfnt = FT_Get_Module( driver->root.root.library, "sfnt" );

    return sfnt ? sfnt->clazz->get_interface( sfnt, interface ) : 0;
  }


  /* The FT_DriverInterface structure is defined in ftdriver.h. */

  FT_CALLBACK_TABLE_DEF
  const FT_Driver_Class  cff_driver_class =
  {
    /* begin with the FT_Module_Class fields */
    {
      ft_module_font_driver | ft_module_driver_scalable,
      sizeof( T2_DriverRec ),
      "cff",
      0x10000L,
      0x20000L,

      0,   /* module-specific interface */

      (FT_Module_Constructor)T2_Init_Driver,
      (FT_Module_Destructor) T2_Done_Driver,
      (FT_Module_Requester)  t2_get_interface,
    },

    /* now the specific driver fields */
    sizeof( TT_FaceRec ),
    sizeof( FT_SizeRec ),
    sizeof( T2_GlyphSlotRec ),

    (FTDriver_initFace)     T2_Init_Face,
    (FTDriver_doneFace)     T2_Done_Face,
    (FTDriver_initSize)     0,
    (FTDriver_doneSize)     0,
    (FTDriver_initGlyphSlot)0,
    (FTDriver_doneGlyphSlot)0,

    (FTDriver_setCharSizes) 0,
    (FTDriver_setPixelSizes)0,

    (FTDriver_loadGlyph)    Load_Glyph,
    (FTDriver_getCharIndex) t2_get_char_index,

    (FTDriver_getKerning)   Get_Kerning,
    (FTDriver_attachFile)   0,
    (FTDriver_getAdvances)  0
  };


#ifdef FT_CONFIG_OPTION_DYNAMIC_DRIVERS


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    getDriverClass                                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    This function is used when compiling the TrueType driver as a      */
  /*    shared library (`.DLL' or `.so').  It will be used by the          */
  /*    high-level library of FreeType to retrieve the address of the      */
  /*    driver's generic interface.                                        */
  /*                                                                       */
  /*    It shouldn't be implemented in a static build, as each driver must */
  /*    have the same function as an exported entry point.                 */
  /*                                                                       */
  /* <Return>                                                              */
  /*    The address of the TrueType's driver generic interface.  The       */
  /*    format-specific interface can then be retrieved through the method */
  /*    interface->get_format_interface.                                   */
  /*                                                                       */
  FT_EXPORT_DEF( const FT_Driver_Class* )  getDriverClass( void )
  {
    return &cff_driver_class;
  }


#endif /* CONFIG_OPTION_DYNAMIC_DRIVERS */


/* END */