VideoPortZeroDeviceMemory function (video.h)
The VideoPortZeroDeviceMemory function fills an adapter frame buffer or other device memory with zeros.
Syntax
VIDEOPORT_DEPRECATED VIDEOPORT_API VOID VideoPortZeroDeviceMemory(
[out] PVOID Destination,
ULONG Length
);
Parameters
[out] Destination
Specifies the base address of the adapter memory area. This value must be a mapped logical address returned by VideoPortGetDeviceBase.
Length
Specifies the size, in bytes, to be filled.
Return value
None
Remarks
Miniport drivers should always call this function, rather than VideoPortZeroMemory, to fill on-adapter memory with zeros.
A miniport driver's HwVidInterrupt or HwVidSynchronizeExecutionCallback function can call VideoPortZeroDeviceMemory.
Callers of VideoPortZeroDeviceMemory can be running at any IRQL if the memory pointed to by the Destination parameter is in nonpaged pool. Otherwise, the caller must be running at IRQL < DISPATCH_LEVEL.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Available in Windows 2000 and later versions of the Windows operating systems. |
| Target Platform | Desktop |
| Header | video.h (include Video.h) |
| Library | Videoprt.lib |
| DLL | Videoprt.sys |
| IRQL | See Remarks section. |