DXGK_FEATURE_INTERFACE structure (dispmprt.h)

The DXGK_FEATURE_INTERFACE structure contains the port driver's interface that can be used to query it for its enabled features and their support.

Syntax

typedef struct _DXGK_FEATURE_INTERFACE {
  USHORT                       Size;
  USHORT                       Version;
  PVOID                        Context;
  PINTERFACE_REFERENCE         InterfaceReference;
  PINTERFACE_DEREFERENCE       InterfaceDereference;
  DXGKCB_ISFEATUREENABLED2     IsFeatureEnabled;
  DXGKCB_QUERYFEATUREINTERFACE QueryFeatureInterface;
} DXGK_FEATURE_INTERFACE, *PDXGK_FEATURE_INTERFACE;

Members

Size

Size of this structure, in bytes.

Version

The version number of the feature interface. Version number constants are defined in Dispmprt.h (for example, DXGK_FEATURE_INTERFACE_VERSION_1).

Context

Pointer to a private context block.

InterfaceReference

Pointer to the port driver's interface reference function.

InterfaceDereference

Pointer to the port driver's interface dereference function.

IsFeatureEnabled

The port driver's DXGKCB_ISFEATUREENABLED2 function. KMD can call this function to query whether the system has enabled a feature.

QueryFeatureInterface

The port driver's DXGKCB_QUERYFEATUREINTERFACE function. KMD can call this function to query the OS for a feature's interface.

Remarks

To get this interface, KMD calls Dxgkrnl's DxgkCbQueryServices callback with ServiceType set to DxgkServicesFeature. KMD can call DxgkCbQueryServices once it obtains the callback's pointer from a call to its DxgkDdiStartDevice.

For more information, see Querying WDDM feature support and enablement.

Requirements

See also

DXGK_SERVICES

DXGKCB_ISFEATUREENABLED2

DXGKCB_QUERYFEATUREINTERFACE

DxgkCbQueryServices

DxgkDdiStartDevice