src/subtitles/subpixel_position_controler.h

   1 /************************************************************************/
   2 /* author: xy                                                           */
   3 /* date: 20110926                                                       */
   4 /************************************************************************/
   5 #ifndef __SUBPIXEL_POSITION_CONTROLER_H_61444994_2880_4407_9308_4B17D0259B2C__
   6 #define __SUBPIXEL_POSITION_CONTROLER_H_61444994_2880_4407_9308_4B17D0259B2C__
   7
   8 #include <atltypes.h>
   9
  10 class SubpixelPositionControler
  11 {
  12 public:
  13     enum SUBPIXEL_LEVEL
  14     {
  15         NONE = 0,
  16         TWO_X_TWO = 1,
  17         FOUR_X_FOUR = 2,
  18         EIGHT_X_EIGHT = 3,
  19         EIGHT_X_EIGHT_INTERPOLATE = 4,
  20         MAX_COUNT
  21     };
  22     enum SUBPIXEL_MASK
  23     {
  24         NONE_MASK = 0,
  25         TWO_X_TWO_MASK = 4,
  26         FOUR_X_FOUR_MASK = 6,
  27         EIGHT_X_EIGHT_MASK = 7,
  28         EIGHT_X_EIGHT_INTERPOLATE_MASK = 0,
  29     };
  30     SUBPIXEL_LEVEL SetSubpixelLevel(SUBPIXEL_LEVEL subpixel_level);
  31     inline SUBPIXEL_LEVEL GetSubpixelLevel()
  32     {
  33         return _subpixel_level;
  34     }
  35     inline CPoint GetSubpixel(const CPoint& p)
  36     {
  37         CPoint result(p.x & _subpixel_mask, p.y & _subpixel_mask);
  38         return result;
  39     }
  40     inline bool UseBilinearShift() { return _subpixel_level==EIGHT_X_EIGHT_INTERPOLATE; }
  41
  42     static SubpixelPositionControler& GetGlobalControler()
  43     {
  44         return s_subpixel_position_controler;
  45     }
  46
  47 private:
  48     SubpixelPositionControler()
  49     {
  50         _subpixel_level = EIGHT_X_EIGHT;
  51         _subpixel_mask = EIGHT_X_EIGHT_MASK;
  52     }
  53     SUBPIXEL_LEVEL _subpixel_level;
  54     SUBPIXEL_MASK _subpixel_mask;
  55     static SubpixelPositionControler s_subpixel_position_controler;
  56 };
  57
  58 #endif // end of __SUBPIXEL_POSITION_CONTROLER_H_61444994_2880_4407_9308_4B17D0259B2C__