ahtypes.h

qt-embedded-2.3.8.tar.gz源码

  /*    contour    :: A pointer to the first point of the segment's        */
  /*                  contour.                                             */
  /*                                                                       */
  /*    pos        :: The segment position in font units.                  */
  /*                                                                       */
  /*    size       :: The segment size.                                    */
  /*                                                                       */
  /*    edge       :: The edge of the current segment.                     */
  /*                                                                       */
  /*    edge_next  :: The next segment on the same edge.                   */
  /*                                                                       */
  /*    link       :: The pairing segment for this edge.                   */
  /*                                                                       */
  /*    serif      :: The primary segment for serifs.                      */
  /*                                                                       */
  /*    num_linked :: The number of other segments that link to this one.  */
  /*                                                                       */
  /*    score      :: Used to score the segment when selecting them.       */
  /*                                                                       */
  struct AH_Segment
  {
    AH_Edge_Flags  flags;
    AH_Direction   dir;

    AH_Point*      first;       /* first point in edge segment             */
    AH_Point*      last;        /* last point in edge segment              */
    AH_Point**     contour;     /* ptr to first point of segment's contour */

    FT_Pos         pos;         /* position of segment           */
    FT_Pos         min_coord;   /* minimum coordinate of segment */
    FT_Pos         max_coord;   /* maximum coordinate of segment */

    AH_Edge*       edge;
    AH_Segment*    edge_next;

    AH_Segment*    link;        /* link segment               */
    AH_Segment*    serif;       /* primary segment for serifs */
    FT_Pos         num_linked;  /* number of linked segments  */
    FT_Int         score;
  };


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    AH_Edge                                                            */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A structure used to describe an edge, which really is a horizontal */
  /*    or vertical coordinate to be hinted depending on the segments      */
  /*    located on it.                                                     */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    flags      :: The segment edge flags (straight, rounded, etc.).    */
  /*                                                                       */
  /*    dir        :: The main segment direction on this edge.             */
  /*                                                                       */
  /*    first      :: The first edge segment.                              */
  /*                                                                       */
  /*    last       :: The last edge segment.                               */
  /*                                                                       */
  /*    fpos       :: The original edge position in font units.            */
  /*                                                                       */
  /*    opos       :: The original scaled edge position.                   */
  /*                                                                       */
  /*    pos        :: The hinted edge position.                            */
  /*                                                                       */
  /*    link       :: The linked edge.                                     */
  /*                                                                       */
  /*    serif      :: The serif edge.                                      */
  /*                                                                       */
  /*    num_paired :: The number of other edges that pair to this one.     */
  /*                                                                       */
  /*    score      :: Used to score the edge when selecting them.          */
  /*                                                                       */
  /*    blue_edge  :: Indicate the blue zone edge this edge is related to. */
  /*                  Only set for some of the horizontal edges in a Latin */
  /*                  font.                                                */
  /*                                                                       */
  struct AH_Edge
  {
    AH_Edge_Flags  flags;
    AH_Direction   dir;

    AH_Segment*    first;
    AH_Segment*    last;

    FT_Pos         fpos;
    FT_Pos         opos;
    FT_Pos         pos;

    AH_Edge*       link;
    AH_Edge*       serif;
    FT_Int         num_linked;

    FT_Int         score;
    FT_Pos*        blue_edge;
  };


  /* an outline as seen by the hinter */
  typedef struct  AH_Outline_
  {
    FT_Memory     memory;

    AH_Direction  vert_major_dir;   /* vertical major direction   */
    AH_Direction  horz_major_dir;   /* horizontal major direction */

    FT_Fixed      x_scale;
    FT_Fixed      y_scale;
    FT_Pos        edge_distance_threshold;

    FT_Int        max_points;
    FT_Int        num_points;
    AH_Point*     points;

    FT_Int        max_contours;
    FT_Int        num_contours;
    AH_Point**    contours;

    FT_Int        num_hedges;
    AH_Edge*      horz_edges;

    FT_Int        num_vedges;
    AH_Edge*      vert_edges;

    FT_Int        num_hsegments;
    AH_Segment*   horz_segments;

    FT_Int        num_vsegments;
    AH_Segment*   vert_segments;

  } AH_Outline;


#define ah_blue_capital_top     0                              /* THEZOCQS */
#define ah_blue_capital_bottom  ( ah_blue_capital_top + 1 )    /* HEZLOCUS */
#define ah_blue_small_top       ( ah_blue_capital_bottom + 1 ) /* xzroesc  */
#define ah_blue_small_bottom    ( ah_blue_small_top + 1 )      /* xzroesc  */
#define ah_blue_small_minor     ( ah_blue_small_bottom + 1 )   /* pqgjy    */
#define ah_blue_max             ( ah_blue_small_minor + 1 )

  typedef FT_Int  AH_Blue;


#define ah_hinter_monochrome  1
#define ah_hinter_optimize    2

  typedef FT_Int  AH_Hinter_Flags;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    AH_Globals                                                         */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Holds the global metrics for a given font face (be it in design    */
  /*    units or scaled pixel values).                                     */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    num_widths  :: The number of widths.                               */
  /*                                                                       */
  /*    num_heights :: The number of heights.                              */
  /*                                                                       */
  /*    widths      :: Snap widths, including standard one.                */
  /*                                                                       */
  /*    heights     :: Snap height, including standard one.                */
  /*                                                                       */
  /*    blue_refs   :: The reference positions of blue zones.              */
  /*                                                                       */
  /*    blue_shoots :: The overshoot positions of blue zones.              */
  /*                                                                       */
  typedef struct AH_Globals_
  {
    FT_Int    num_widths;
    FT_Int    num_heights;

    FT_Pos    widths [AH_MAX_WIDTHS];
    FT_Pos    heights[AH_MAX_HEIGHTS];

    FT_Pos    blue_refs  [ah_blue_max];
    FT_Pos    blue_shoots[ah_blue_max];

  } AH_Globals;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    AH_Face_Globals                                                    */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Holds the complete global metrics for a given font face (i.e., the */
  /*    design units version + a scaled version + the current scales       */
  /*    used).                                                             */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    face    :: A handle to the source face object                      */
  /*                                                                       */
  /*    design  :: The globals in font design units.                       */
  /*                                                                       */
  /*    scaled  :: Scaled globals in sub-pixel values.                     */
  /*                                                                       */
  /*    x_scale :: The current horizontal scale.                           */
  /*                                                                       */
  /*    y_scale :: The current vertical scale.                             */
  /*                                                                       */
  typedef struct  AH_Face_Globals_
  {
    FT_Face     face;
    AH_Globals  design;
    AH_Globals  scaled;
    FT_Fixed    x_scale;
    FT_Fixed    y_scale;
    FT_Bool     control_overshoot;

  } AH_Face_Globals;


  typedef struct  AH_Hinter
  {
    FT_Memory         memory;
    AH_Hinter_Flags   flags;

    FT_Int            algorithm;
    FT_Face           face;

    AH_Face_Globals*  globals;

    AH_Outline*       glyph;

    AH_Loader*        loader;
    FT_Vector         pp1;
    FT_Vector         pp2;

    FT_Bool           transformed;
    FT_Vector         trans_delta;
    FT_Matrix         trans_matrix;

  } AH_Hinter;


#ifdef __cplusplus
  }
#endif


#endif /* AHTYPES_H */


/* END */