DDHAL_DDCALLBACKS (Windows Embedded CE 6.0)
1/6/2010
This structure contains the DirectDraw callback functions. It is included in the DDHALINFO structure.
Syntax
typedef struct _DDHAL_DDCALLBACKS {
DWORD dwSize;
DWORD dwFlags;
LPDDHAL_CREATESURFACE CreateSurface;
LPDDHAL_WAITFORVERTICALBLANK WaitForVerticalBlank;
LPDDHAL_CANCREATESURFACE CanCreateSurface;
LPDDHAL_CREATEPALETTE CreatePalette;
LPDDHAL_GETSCANLINE GetScanLine;
} DDHAL_DDCALLBACKS;
typedef DDHAL_DDCALLBACKS FAR *LPDDHAL_DDCALLBACKS;
Members
- dwSize
Size of the structure. This parameter must be initialized before the structure is used.
dwFlags
Indicates whether the DirectDraw functions are implemented.The following table shows the possible flags.
Flag Description DDHAL_CB32_CANCREATESURFACE
Indicates whether the LPDDHAL_CANCREATESURFACE callback function is implemented.
DDHAL_CB32_CREATESURFACE
Indicates whether the LPDDHAL_CREATESURFACE callback function is implemented.
DDHAL_CB32_GETSCANLINE
Indicates whether the LPDDHAL_GETSCANLINE callback function is implemented.
DDHAL_CB32_WAITFORVERTICALBLANK
Indicates whether the LPDDHAL_WAITFORVERTICALBLANK callback function is implemented.
- CreateSurface
Pointer to the driver's implementation of the LPDDHAL_CREATESURFACE callback function.
- WaitForVerticalBlank
Pointer to the driver's implementation of the LPDDHAL_WAITFORVERTICALBLANK callback function.
- CanCreateSurface
Pointer to the driver's implementation of the LPDDHAL_CANCREATESURFACE callback function.
- CreatePalette
Unsupported. Must be set to NULL.
- GetScanLine
Pointer to the driver's implementation of the LPDDHAL_GETSCANLINE callback function.
Remarks
This structure contains the entry points in the display driver that DirectDraw calls. Entries that the display driver does not use should be set to NULL.
Requirements
| Header | ddrawi.h |
| Windows Embedded CE | Windows Embedded CE 6.0 and later |
See Also
Reference
DDHALINFO
LPDDHAL_CANCREATESURFACE
LPDDHAL_CREATESURFACE
LPDDHAL_GETSCANLINE
LPDDHAL_WAITFORVERTICALBLANK