// d3dkmddi.h

typedef struct _DXGK_MULTIPLANE_OVERLAY_POST_COMPOSITION {
  DXGK_MULTIPLANE_OVERLAY_POST_COMPOSITION_FLAGS Flags;
  RECT                                           SrcRect;
  RECT                                           DstRect;
  D3DDDI_ROTATION                                Rotation;
} DXGK_MULTIPLANE_OVERLAY_POST_COMPOSITION;
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Windows Driver Kit DDI reference (ns-d3dkmddi-_dxgk_multiplane_overlay_post_composition)

_DXGK_MULTIPLANE_OVERLAY_POST_COMPOSITION structure

Description

Specifies information about any additional transforms that should occur after the planes are composed.

Members

`Flags`

A DXGK_MULTIPLANE_OVERLAY_POST_COMPOSITION_FLAGS structure indicating additional transform information.

`SrcRect`

Contains the source rect of the virtual mode.

`DstRect`

Contains the destination rect of the virtual mode.

`Rotation`

Indicates additional rotation that should occur on the final image.

Remarks

The source mode contains the virtual mode size and the destination rectangle indicates how the virtual mode maps to the physical mode.

For example, if a 1024x768 virtual mode is used with 1920x1080 physical mode, the following configurations are possible:

Stretch mode:

SrcRect = {0, 0, 1024, 768}
DstRect = {0, 0, 1920, 1080}

Centered mode:

SrcRect = {0, 0, 1024, 768}
DstRect = {448, 156, 1472, 924}

Aspect ratio stretched:

SrcRect = {0, 0, 1024, 768}
DstRect = {240, 0, 1680, 1080} // 1080p monitor resolution

View the official Windows Driver Kit DDI reference

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