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The DDHAL_UPDATEVPORTDATAstructure contains the information required to start, stop, and change the video port. This structure passes the information to the DirectDraw HAL UpdateVideoPortcallback function.
typedef struct _DDHAL_UPDATEVPORTDATA {
LPDDRAWI_DIRECTDRAW_LCL
lpDD
;
LPDDRAWI_DDVIDEOPORT_LCL
lpVideoPort
;
LPDDRAWI_DDRAWSURFACE_INT *
lplpDDSurface
;
LPDDRAWI_DDRAWSURFACE_INT
*
lplpDDVBISurface
;
LPDDVIDEOPORTINFO
lpVideoInfo
;
DWORD
dwFlags
;
DWORD
dwNumAutoflip
;
DWORD
dwNumVBIAutoflip
;
HRESULT
ddRVal
;
LPDDHALVPORTCB_UPDATE
UpdateVideoPort
;
} DDHAL_UPDATEVPORTDATA;
Members
- lpDD
- Pointer to the DDRAWI_DIRECTDRAW_LCLstructure that represents the DirectDraw object.
- lpVideoPort
- Pointer to the DDRAWI_DDVIDEOPORT_LCLstructure that represents this video port.
- lplpDDSurface
- Pointer to an array of surface structures that represent regular video surfaces. This member points to an array of surface structures to accommodate autoflipping.
- lplpDDVBISurface
- Pointer to an array of surface structures that represent VBI surfaces. This member points to an array of surface structures to accommodate autoflipping.
- lpVideoInfo
- Pointer to a DDVIDEOPORTINFOstructure that describes the transfer of video data to a surface.
- dwFlags
- Control flags for the video port. One of the following:
Flag Usage DDRAWI_VPORTSTART Indicates that the video port is being started. DDRAWI_VPORTSTOP Indicates that the video port is being stopped. DDRAWI_VPORTUPDATE Indicates that the video port is being updated. - dwNumAutoflip
- Contains the number of surfaces in the list if autoflipping is requested. If this value is greater than 1, lplpDDSurfaceand lplpDDVBISurfaceare arrays.
- dwNumVBIAutoflip
- Contains the number of surfaces in the list if autoflipping is requested. This pertains to devices that can pump the VBI data to a different surface. If this value is greater than 1, lplpDDSurfaceand lplpDDVIBSurfaceare arrays.
- ddRVal
- Passes the DirectDraw return values.
- UpdateVideoPort
- This member is used by DirectDraw and should not be filled in
by the driver.
Last updated on Tuesday, July 13, 2004