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NtGdiDdRenderMoComp function

[This function is subject to change with each operating system revision. Instead, use the Microsoft DirectDraw and Microsoft Direct3DAPIs; these APIs insulate applications from such operating system changes, and hide many other difficulties involved in interacting directly with display drivers.]

Tells the driver what macroblocks to render by specifying the surfaces containing the macroblocks, the offsets in each surface where the macroblocks exist, and the size of the macroblock data to be rendered.


  _In_    HANDLE               hMoComp,
  _Inout_ PDD_RENDERMOCOMPDATA puRenderMoCompData


hMoComp [in]

Handle to a DD_MOTIONCOMP_LOCAL structure that contains a description of the motion compensation being requested.

puRenderMoCompData [in, out]

Pointer to a DD_RENDERMOCOMPDATA structure that contains the information needed to render a frame.

Return value

NtGdiDdRenderMoComp returns one of the following callback codes.

Return codeDescription

The driver has performed the operation and returned a valid return code for that operation. If this code is DD_OK, DirectDraw or Direct3D proceeds with the function. Otherwise, DirectDraw or Direct3D returns the error code provided by the driver and aborts the function.


The driver has no comment on the requested operation. If the driver is required to have implemented a particular callback, DirectDraw or Direct3D reports an error condition. Otherwise, DirectDraw or Direct3D handles the operation as if the driver callback had not been defined by executing the DirectDraw or Direct3D device-independent implementation.



For more information, see the Microsoft DirectX Video Acceleration Driver Development Kit (DDK).


Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]



See also

Graphics Low Level Client Support



Community Additions

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