IDirect3DRMFrame2::SetSceneBackgroundDepth
Specifies a background-depth buffer for a scene.
HRESULT SetSceneBackgroundDepth(
LPDIRECTDRAWSURFACE lpImage
);
Parameters
lpImage
Address of a DirectDraw surface that will store the new background depth for the scene.
Return Values
Returns D3DRM_OK if successful, or an error otherwise. For a list of possible return codes, see Direct3D Retained-Mode Return Values.
Remarks
The image must have a depth of 16. If the image and viewport sizes are different, the image is scaled first. For best performance when animating the background-depth buffer, the image should be the same size as the viewport. This enables the depth buffer to be updated directly from the image memory without incurring extra overhead.
See Also