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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

See also

pfnGetNumPathsFromSource