qrasterdefs_p.h

奇趣公司比较新的qt/emd版本

  /*                                 try to detect drop-outs in an outline */
  /*                                 and correct the glyph bitmap to       */
  /*                                 ensure consistent shape continuity.   */
  /*                                 If set, this flag hints the scan-line */
  /*                                 converter to ignore such cases.       */
  /*                                                                       */
  /*   QT_FT_OUTLINE_HIGH_PRECISION  :: This flag indicates that the          */
  /*                                 scan-line converter should try to     */
  /*                                 convert this outline to bitmaps with  */
  /*                                 the highest possible quality.  It is  */
  /*                                 typically set for small character     */
  /*                                 sizes.  Note that this is only a      */
  /*                                 hint, that might be completely        */
  /*                                 ignored by a given scan-converter.    */
  /*                                                                       */
  /*   QT_FT_OUTLINE_SINGLE_PASS     :: This flag is set to force a given     */
  /*                                 scan-converter to only use a single   */
  /*                                 pass over the outline to render a     */
  /*                                 bitmap glyph image.  Normally, it is  */
  /*                                 set for very large character sizes.   */
  /*                                 It is only a hint, that might be      */
  /*                                 completely ignored by a given         */
  /*                                 scan-converter.                       */
  /*                                                                       */
#define QT_FT_OUTLINE_NONE             0x0
#define QT_FT_OUTLINE_OWNER            0x1
#define QT_FT_OUTLINE_EVEN_ODD_FILL    0x2
#define QT_FT_OUTLINE_REVERSE_FILL     0x4
#define QT_FT_OUTLINE_IGNORE_DROPOUTS  0x8

#define QT_FT_OUTLINE_HIGH_PRECISION   0x100
#define QT_FT_OUTLINE_SINGLE_PASS      0x200


 /*************************************************************************
  *
  * @enum:
  *   qt_ft_outline_flags
  *
  * @description:
  *   These constants are deprecated.  Please use the corresponding
  *   @QT_FT_OUTLINE_FLAGS values.
  *
  * @values:
  *   qt_ft_outline_none            :: See @QT_FT_OUTLINE_NONE.
  *   qt_ft_outline_owner           :: See @QT_FT_OUTLINE_OWNER.
  *   qt_ft_outline_even_odd_fill   :: See @QT_FT_OUTLINE_EVEN_ODD_FILL.
  *   qt_ft_outline_reverse_fill    :: See @QT_FT_OUTLINE_REVERSE_FILL.
  *   qt_ft_outline_ignore_dropouts :: See @QT_FT_OUTLINE_IGNORE_DROPOUTS.
  *   qt_ft_outline_high_precision  :: See @QT_FT_OUTLINE_HIGH_PRECISION.
  *   qt_ft_outline_single_pass     :: See @QT_FT_OUTLINE_SINGLE_PASS.
  */
#define qt_ft_outline_none             QT_FT_OUTLINE_NONE
#define qt_ft_outline_owner            QT_FT_OUTLINE_OWNER
#define qt_ft_outline_even_odd_fill    QT_FT_OUTLINE_EVEN_ODD_FILL
#define qt_ft_outline_reverse_fill     QT_FT_OUTLINE_REVERSE_FILL
#define qt_ft_outline_ignore_dropouts  QT_FT_OUTLINE_IGNORE_DROPOUTS
#define qt_ft_outline_high_precision   QT_FT_OUTLINE_HIGH_PRECISION
#define qt_ft_outline_single_pass      QT_FT_OUTLINE_SINGLE_PASS

  /* */

#define QT_FT_CURVE_TAG( flag )  ( flag & 3 )

#define QT_FT_CURVE_TAG_ON           1
#define QT_FT_CURVE_TAG_CONIC        0
#define QT_FT_CURVE_TAG_CUBIC        2

#define QT_FT_CURVE_TAG_TOUCH_X      8  /* reserved for the TrueType hinter */
#define QT_FT_CURVE_TAG_TOUCH_Y     16  /* reserved for the TrueType hinter */

#define QT_FT_CURVE_TAG_TOUCH_BOTH  ( QT_FT_CURVE_TAG_TOUCH_X | \
                                   QT_FT_CURVE_TAG_TOUCH_Y )

#define  QT_FT_Curve_Tag_On       QT_FT_CURVE_TAG_ON
#define  QT_FT_Curve_Tag_Conic    QT_FT_CURVE_TAG_CONIC
#define  QT_FT_Curve_Tag_Cubic    QT_FT_CURVE_TAG_CUBIC
#define  QT_FT_Curve_Tag_Touch_X  QT_FT_CURVE_TAG_TOUCH_X
#define  QT_FT_Curve_Tag_Touch_Y  QT_FT_CURVE_TAG_TOUCH_Y

  /*************************************************************************/
  /*                                                                       */
  /* <FuncType>                                                            */
  /*    QT_FT_Outline_MoveToFunc                                              */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A function pointer type used to describe the signature of a `move  */
  /*    to' function during outline walking/decomposition.                 */
  /*                                                                       */
  /*    A `move to' is emitted to start a new contour in an outline.       */
  /*                                                                       */
  /* <Input>                                                               */
  /*    to   :: A pointer to the target point of the `move to'.            */
  /*                                                                       */
  /*    user :: A typeless pointer which is passed from the caller of the  */
  /*            decomposition function.                                    */
  /*                                                                       */
  /* <Return>                                                              */
  /*    Error code.  0 means success.                                      */
  /*                                                                       */
  typedef int
  (*QT_FT_Outline_MoveToFunc)( QT_FT_Vector*  to,
                            void*       user );

#define QT_FT_Outline_MoveTo_Func  QT_FT_Outline_MoveToFunc

  /*************************************************************************/
  /*                                                                       */
  /* <FuncType>                                                            */
  /*    QT_FT_Outline_LineToFunc                                              */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A function pointer type used to describe the signature of a `line  */
  /*    to' function during outline walking/decomposition.                 */
  /*                                                                       */
  /*    A `line to' is emitted to indicate a segment in the outline.       */
  /*                                                                       */
  /* <Input>                                                               */
  /*    to   :: A pointer to the target point of the `line to'.            */
  /*                                                                       */
  /*    user :: A typeless pointer which is passed from the caller of the  */
  /*            decomposition function.                                    */
  /*                                                                       */
  /* <Return>                                                              */
  /*    Error code.  0 means success.                                      */
  /*                                                                       */
  typedef int
  (*QT_FT_Outline_LineToFunc)( QT_FT_Vector*  to,
                            void*       user );

#define  QT_FT_Outline_LineTo_Func  QT_FT_Outline_LineToFunc

  /*************************************************************************/
  /*                                                                       */
  /* <FuncType>                                                            */
  /*    QT_FT_Outline_ConicToFunc                                             */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A function pointer type use to describe the signature of a `conic  */
  /*    to' function during outline walking/decomposition.                 */
  /*                                                                       */
  /*    A `conic to' is emitted to indicate a second-order Bezier arc in   */
  /*    the outline.                                                       */
  /*                                                                       */
  /* <Input>                                                               */
  /*    control :: An intermediate control point between the last position */
  /*               and the new target in `to'.                             */
  /*                                                                       */
  /*    to      :: A pointer to the target end point of the conic arc.     */
  /*                                                                       */
  /*    user    :: A typeless pointer which is passed from the caller of   */
  /*               the decomposition function.                             */
  /*                                                                       */
  /* <Return>                                                              */
  /*    Error code.  0 means success.                                      */
  /*                                                                       */
  typedef int
  (*QT_FT_Outline_ConicToFunc)( QT_FT_Vector*  control,
                             QT_FT_Vector*  to,
                             void*       user );

#define  QT_FT_Outline_ConicTo_Func  QT_FT_Outline_ConicToFunc

  /*************************************************************************/
  /*                                                                       */
  /* <FuncType>                                                            */
  /*    QT_FT_Outline_CubicToFunc                                             */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A function pointer type used to describe the signature of a `cubic */
  /*    to' function during outline walking/decomposition.                 */
  /*                                                                       */
  /*    A `cubic to' is emitted to indicate a third-order Bezier arc.      */
  /*                                                                       */
  /* <Input>                                                               */
  /*    control1 :: A pointer to the first Bezier control point.           */
  /*                                                                       */
  /*    control2 :: A pointer to the second Bezier control point.          */
  /*                                                                       */
  /*    to       :: A pointer to the target end point.                     */
  /*                                                                       */
  /*    user     :: A typeless pointer which is passed from the caller of  */
  /*                the decomposition function.                            */
  /*                                                                       */
  /* <Return>                                                              */
  /*    Error code.  0 means success.                                      */
  /*                                                                       */
  typedef int
  (*QT_FT_Outline_CubicToFunc)( QT_FT_Vector*  control1,
                             QT_FT_Vector*  control2,
                             QT_FT_Vector*  to,
                             void*       user );

#define  QT_FT_Outline_CubicTo_Func  QT_FT_Outline_CubicToFunc


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    QT_FT_Outline_Funcs                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A structure to hold various function pointers used during outline  */
  /*    decomposition in order to emit segments, conic, and cubic Beziers, */
  /*    as well as `move to' and `close to' operations.                    */
  /*                                                                       */
  /* <Fields>                                                              */