VidPN Path-Independent Rotation Interface

Starting with Windows 8.1 Update, your display miniport driver can call these functions that return a rotation value for the display screen:

In this section

TopicDescription

D3DKMDT_VPPR_GET_CONTENT_ROTATION

A helper function that extracts the combined rotation that the user sees from the default display orientation from a given value of the D3DKMDT_VIDPN_PRESENT_PATH_ROTATION enumeration. This value is effectively the sum of the offset angle and the angle that the Desktop Window Manager (DWM) has already rotated the primary clone path content. Only drivers that support path-independent rotation (DXGKDDI_INTERFACE_VERSION >= DXGKDDI_INTERFACE_VERSION_WDDM1_3_PATH_INDEPENDENT_ROTATION) should call this function.

D3DKMDT_VPPR_GET_CONTENT_ROTATION_PART

A helper function that extracts the rotation angle from a given value of the D3DKMDT_VIDPN_PRESENT_PATH_ROTATION enumeration. Only drivers that support path-independent rotation (DXGKDDI_INTERFACE_VERSION >= DXGKDDI_INTERFACE_VERSION_WDDM1_3_PATH_INDEPENDENT_ROTATION) should call this function.

D3DKMDT_VPPR_GET_OFFSET_ROTATION

A helper function that extracts the offset angle from a given value of the D3DKMDT_VIDPN_PRESENT_PATH_ROTATION enumeration. Only drivers that support path-independent rotation (DXGKDDI_INTERFACE_VERSION >= DXGKDDI_INTERFACE_VERSION_WDDM1_3_PATH_INDEPENDENT_ROTATION) should call this function.

 

For more info, see Supporting Path-Independent Rotation.

 

 

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