DD_KERNELCALLBACKS structure (ddrawint.h)
The DD_KERNELCALLBACKS structure contains entry pointers to the DirectDraw kernel-mode callback functions that the driver supports.
Syntax
typedef struct DD_KERNELCALLBACKS {
DWORD dwSize;
DWORD dwFlags;
PDD_KERNELCB_SYNCSURFACE SyncSurfaceData;
PDD_KERNELCB_SYNCVIDEOPORT SyncVideoPortData;
} DD_KERNELCALLBACKS, *PDD_KERNELCALLBACKS;
Members
dwSize
Specifies the size in bytes of this DD_KERNELCALLBACKS structure.
dwFlags
Indicates what Microsoft DirectDraw kernel callback functions the driver has implemented. For every bit set in dwFlags, the driver must initialize the corresponding function pointer member of this structure. This member can be one or more of the following flags:
- DDHAL_KERNEL_SYNCSURFACEDATA
- DDHAL_KERNEL_SYNCVIDEOPORTDATA
SyncSurfaceData
Points to the driver-supplied DdSyncSurfaceData callback.
SyncVideoPortData
Points to the driver-supplied DdSyncVideoPortData callback.
Remarks
Entries that the display driver does not use should be set to NULL. The driver should initialize this structure when its DdGetDriverInfo function is called with the GUID_KernelCallbacks GUID.
Requirements
| Requirement | Value |
|---|---|
| Header | ddrawint.h (include Winddi.h) |