DXGKDDI_VIDPNTOPOLOGY_ACQUIRENEXTPATHINFO callback function (d3dkmddi.h)
The pfnAcquireNextPathInfo function returns a descriptor of the next video present path in a specified VidPN topology, given the current path.
Syntax
DXGKDDI_VIDPNTOPOLOGY_ACQUIRENEXTPATHINFO DxgkddiVidpntopologyAcquirenextpathinfo;
NTSTATUS DxgkddiVidpntopologyAcquirenextpathinfo(
[in] IN_CONST_D3DKMDT_HVIDPNTOPOLOGY hVidPnTopology,
[in] IN_CONST_PD3DKMDT_VIDPN_PRESENT_PATH_CONST pVidPnPresentPathInfo,
[out] DEREF_OUT_CONST_PPD3DKMDT_VIDPN_PRESENT_PATH ppNextVidPnPresentPathInfo
)
{...}
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.
[in] pVidPnPresentPathInfo
A pointer to a D3DKMDT_VIDPN_PRESENT_PATH structure that describes the current path. The display miniport driver previously obtained this pointer by calling pfnAcquireFirstPathInfo or pfnAcquireNextPathInfo.
[out] ppNextVidPnPresentPathInfo
A pointer to a variable that receives a pointer to a D3DKMDT_VIDPN_PRESENT_PATH structure that describes the next path.
Return value
The pfnAcquireNextPathInfo 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
When you have finished using the D3DKMDT_VIDPN_PRESENT_PATH structure, you must release the structure by calling pfnReleasePathInfo.
You can enumerate all the paths that belong to a VidPN topology object by calling pfnAcquireFirstPathInfo and then making a sequence of calls to pfnAcquireNextPathInfo.
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 |