// d3dumddi.h

typedef struct _D3DDDIARG_DISCARD {
  HANDLE     hResource;
  UINT       FirstSubResource;
  UINT       NumSubResources;
  const RECT *pRects;
  UINT       NumRects;
} D3DDDIARG_DISCARD;
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Windows Driver Kit DDI reference (ns-d3dumddi-_d3dddiarg_discard)

_D3DDDIARG_DISCARD structure

Description

Defines video display memory that can be discarded because the contents are no longer needed.

Members

`hResource`

A handle to the resource in which subresources are to be discarded.

`FirstSubResource`

The index of the first subresource to be discarded.

`NumSubResources`

The number of subresources to be discarded.

`pRects`

An array of RECT structures for the rectangles in the resource view to discard. If NULL, the Discard function discards the entire surface.

`NumRects`

The number of rectangles in the array that the pRects member specifies.

D3DDDIARG_DISCARD - NtDoc