DXGKDDI_FEATURE_INTERFACE structure (dispmprt.h)

The DXGKDDI_FEATURE_INTERFACE structure contains the display kernel-mode miniport driver's (KMD's) interface that the port driver can call to query for KMD's feature support.

Syntax

typedef struct _DXGKDDI_FEATURE_INTERFACE {
  USHORT                         Size;
  USHORT                         Version;
  PVOID                          Context;
  PINTERFACE_REFERENCE           InterfaceReference;
  PINTERFACE_DEREFERENCE         InterfaceDereference;
  PDXGKDDI_QUERYFEATURESUPPORT   QueryFeatureSupport;
  PDXGKDDI_QUERYFEATUREINTERFACE QueryFeatureInterface;
} DXGKDDI_FEATURE_INTERFACE, *PDXGKDDI_FEATURE_INTERFACE;

Members

Size

The size, in bytes, of this structure.

Version

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

Context

A pointer to a private context block.

InterfaceReference

Pointer to a KMD-implemented interface reference function.

InterfaceDereference

Pointer to a KMD-implemented interface dereference function.

QueryFeatureSupport

Pointer to a KMD-implemented DxgkDdiQueryFeatureSupport function to query feature support.

QueryFeatureInterface

Pointer to a KMD-implemented DxgkDdiQueryFeatureInterface function to query KMD's interfaces for a feature. The OS only calls these interfaces for enabled features, and always requests the interface for a version of the feature that the driver supports.

Remarks

If the driver implements the DXGKDDI_FEATURE_INTERFACE, it no longer needs to call DxgkCbQueryFeatureSupport to enable a feature in the port driver ahead of time. It can instead query feature support on demand using its DXGKDDI_FEATURE_INTERFACE interface.

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

Requirements

See also

DxgkDdiQueryFeatureSupport

DxgkDdiQueryInterface