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Windows Mobile 6.5
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This method adds a dirty region to a texture resource.

HRESULT AddDirtyRect(
  CONST RECT* pDirtyRect


[in] Pointer to a RECT structure that specifies the dirty region to add. Specifying NULL expands the dirty region to cover the entire texture.

If the method succeeds, the return value is D3DM_OK (see D3DM Values).

If the method fails, the return value can be D3DMERR_INVALIDCALL (see D3DMERR Values).

For performance reasons, dirty regions are only recorded for level zero of a texture. For sublevels, it is assumed that the corresponding (scaled) rectangle or box is also dirty. Dirty regions are automatically recorded when IDirect3DMobileTexture::LockRect is called without D3DMLOCK_NO_DIRTY_UPDATE or D3DMLOCK_READONLY (see D3DMLOCK Values). Also, the destination surface of a IDirect3DMobileDevice::CopyRects call is marked dirty.

Applications can optimize what subset of a resource is copied by specifying dirty regions on the resource.

LibraryD3dm.lib, D3dmguid.lib
Windows Embedded CEWindows CE 5.0 and later
Windows MobileWindows Mobile Version 5.0 and later

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