DXGK_MULTIPLANE_OVERLAY_ATTRIBUTES3 - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// d3dkmddi.h

typedef struct _DXGK_MULTIPLANE_OVERLAY_ATTRIBUTES3 {
  DXGK_MULTIPLANE_OVERLAY_FLAGS           Flags;
  RECT                                    SrcRect;
  RECT                                    DstRect;
  RECT                                    ClipRect;
  D3DDDI_ROTATION                         Rotation;
  DXGK_MULTIPLANE_OVERLAY_BLEND           Blend;
  D3DDDI_COLOR_SPACE_TYPE                 ColorSpaceType;
  DXGK_MULTIPLANE_OVERLAY_STRETCH_QUALITY StretchQuality;
  UINT                                    SDRWhiteLevel;
  UINT                                    DirtyRectCnt;
  const RECT                              *pDirtyRects;
} DXGK_MULTIPLANE_OVERLAY_ATTRIBUTES3;
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ns-d3dkmddi-_dxgk_multiplane_overlay_attributes3)

_DXGK_MULTIPLANE_OVERLAY_ATTRIBUTES3 structure

Description

A structure containing the attributes used for the image in a multiplane overlay.

Members

Flags

Specifies a combination of flip operations by Oring values in the DXGK_MULTIPLANE_OVERLAY_FLAGS enumeration.

SrcRect

Specifies the source rectangle, of type RECT, relative to the source resource.

DstRect

Specifies the destination rectangle, of type RECT, relative to the monitor resolution.

ClipRect

Specifies additional clipping information, of type RECT, relative to the DstRect rectangle, after the data has been stretched according to the values of SrcRect and DstRect.

The driver and hardware can use the ClipRect member to apply a common stretch factor as the clipping changes when an app occludes part of the DstRect destination rectangle.

Rotation

Specifies the clockwise rotation of the overlay plane, given as a value from the D3DDDI_ROTATION enumeration.

Blend

Specifies the blend mode that applies to this overlay plane and the plane beneath it, given as a value from the DXGK_MULTIPLANE_OVERLAY_BLEND enumeration.

ColorSpaceType

Specifies the color space configuration, given as a value from the D3DDDI_COLOR_SPACE_TYPE enumeration.

StretchQuality

Specifies the overlay plane's stretch quality, given as a value from the DXGK_MULTIPLANE_OVERLAY_STRETCH_QUALITY enumeration.

SDRWhiteLevel

Specifies the value in nits that the driver should to map sRGB 1.0.

For HDR content, this will always be 0.

For SDR (standard dynamic range) content, a value of 0 indicates that the driver should map sRGB 1.0 to the default value, which is 80 nits.

This value is ignored when not in HDR mode.

DirtyRectCnt

The number of dirty rectangles of pDirtyRects.

pDirtyRects

Pointer of the dirty rectangles.

Remarks

WDDM 2.3 drivers need to check the SDRWhiteLevel value passed in the CheckMultiPlaneOverlaySupport3 callback, and return unsupported if the hardware is unable to adjust the relative brightness of the SDR content.

When boosting the SDR content to the SDRWhiteLevel, the scaling must occur in linear space.

View the official Windows Driver Kit DDI reference

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