DXGKDDI_VIDPNTOPOLOGY_GETNUMPATHS callback function (d3dkmddi.h)
The pfnGetNumPaths function returns the number of video present paths in a specified VidPN topology.
Syntax
DXGKDDI_VIDPNTOPOLOGY_GETNUMPATHS DxgkddiVidpntopologyGetnumpaths;
NTSTATUS DxgkddiVidpntopologyGetnumpaths(
[in] IN_CONST_D3DKMDT_HVIDPNTOPOLOGY hVidPnTopology,
[out] OUT_PSIZE_T pNumPaths
)
{...}
Parameters
[in] hVidPnTopology
A handle to a VidPN topology object. The display miniport driver previously obtained this handle by calling the pfnGetTopology function of the DXGK_VIDPN_INTERFACE interface.
[out] pNumPaths
A pointer to a SIZE_T-typed variable that receives the number of paths.
Return value
The pfnGetNumPaths function returns one of the following values:
Return code | Description |
---|---|
STATUS_SUCCESS | The function succeeded. |
STATUS_GRAPHICS_INVALID_VIDPN_TOPOLOGY | The handle supplied in hVidPnTopology was invalid. |
Remarks
The D3DKMDT_HVIDPNTOPOLOGY data type is defined in D3dkmdt.h.
Requirements
Requirement | Value |
---|---|
Minimum supported client | Windows Vista |
Target Platform | Desktop |
Header | d3dkmddi.h (include D3dkmddi.h) |
IRQL | PASSIVE_LEVEL |