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ENGCALLBACKS (Compact 2013)

  • Article

3/26/2014

This structure contains function pointers to the GDI functions for display drivers. It is passed from GDI through DrvEnableDriver to GPEEnableDriver.

Syntax

typedef struct _ENGCALLBACKS {
  PVOID (* BRUSHOBJ_pvAllocRbrush)(
    BRUSHOBJ* pbo,
    ULONG cj
  );
  PVOID (* BRUSHOBJ_pvGetRbrush)(
    BRUSHOBJ* pbo
  );
  ULONG (* CLIPOBJ_cEnumStart)(
    CLIPOBJ* pco,
    BOOL bAll,
    ULONG iType,
    ULONG iDirection,
    ULONG cLimit
  );
  BOOL (* CLIPOBJ_bEnum)(
    CLIPOBJ* pco,
    ULONG cj,
    ULONG* pul
  );
  ULONG (* PALOBJ_cGetColors)(
    PALOBJ* ppalo,
    ULONG iStart,
    ULONG cColors,
    ULONG* pulColors
  );
  VOID (* PATHOBJ_vEnumStart)(
    PATHOBJ* ppo
  );
  BOOL (* PATHOBJ_bEnum)(
    PATHOBJ* ppo,
    PATHDATA* ppd
  );
  VOID (* PATHOBJ_vGetBounds)(
    PATHOBJ* ppo,
    PRECTFX prectfx
  );
  ULONG (* XLATEOBJ_cGetPalette)(
    XLATEOBJ* pxlo,
    ULONG iPal,
    ULONG cPal,
    ULONG* pPal
  );
  HSURF (* EngCreateDeviceSurface)(
    DHSURF dhsurf,
    SIZEL sizl,
    ULONG iFormatCompat
  );
  BOOL (* EngDeleteSurface)(
    HSURF hsurf
  );
  HBITMAP (* EngCreateDeviceBitmap)(
    DHSURF dhsurf,
    SIZEL sizl,
    ULONG iFormatCompat
  );
  HPALETTE (* EngCreatePalette)(
    ULONG iMode,
    ULONG cColors,
    PULONG pulColors,
    FLONG flRed,
    FLONG flGreen,
    FLONG flBlue
  );
} ENGCALLBACKS,* PENGCALLBACKS;

Members

  • BRUSHOBJ_pvAllocRbrush
    Pointer to a function that allocates memory for a brush. For more information, see BRUSHOBJ_pvAllocRbrush.
  • BRUSHOBJ_pvGetRbrush
    Pointer to a function that retrieves a pointer to the specified brush. For more information, see BRUSHOBJ_pvGetRbrush.
  • CLIPOBJ_cEnumStart
    Pointer to a function that sets parameters for enumerating the rectangles in a clipping region. For more information, see CLIPOBJ_cEnumStart.
  • CLIPOBJ_bEnum
    Pointer to a function that enumerates clipping rectangles from a clipping region. For more information, see CLIPOBJ_bEnum.
  • PALOBJ_cGetColors
    Pointer to a function that copies colors into a palette. For more information, see PALOBJ_cGetColors.
  • PATHOBJ_vEnumStart
    Pointer to a function that readies a drawing path to have its component line segments enumerated. For more information, see PATHOBJ_vEnumStart.
  • PATHOBJ_bEnum
    Pointer to a function that enumerates PATHDATA records from a drawing path. For more information, see PATHOBJ_bEnum.
  • PATHOBJ_vGetBounds
    Pointer to a function that returns the bounding rectangle for a drawing path. For more information, see PATHOBJ_vGetBounds.
  • XLATEOBJ_cGetPalette
    Pointer to a function that retrieves colors from an indexed palette. For more information, see XLATEOBJ_cGetPalette.
  • EngCreateDeviceSurface
    Pointer to a function that causes the GDI to create a device surface that the display driver manages. For more information, see EngCreateDeviceSurface.
  • EngDeleteSurface
    Pointer to a function that informs the GDI that a device surface no longer is needed by the display driver. For more information, see EngDeleteSurface.
  • EngCreateDeviceBitmap
    Pointer to a function that causes the GDI to create a handle for a device bitmap. For more information, see EngCreateDeviceBitmap.
  • EngCreatePalette
    Pointer to a function that causes the GDI to create a handle to a default palette. For more information, see EngCreatePalette.

Requirements

Header

winddi.h

See Also

Reference

Display Driver Structures
DrvEnableDriver
GPEEnableDriver