Virtualbox WDDM 用户模式显示驱动之OpenAdapter

/*On input, this structure contains information that the driver can use. 作为输入，包含驱动可以使用的信息On output, the driver specifies information that the Microsoft Direct3D runtime can use.作为输出，驱动填充D3D runtime能使用的数据*/HRESULT APIENTRY OpenAdapter (__inout D3DDDIARG_OPENADAPTER*  pOpenData){    vboxVDbgPrint(("==> "__FUNCTION__"\n"));    AssertBreakpoint();    PVBOXWDDMDISP_ADAPTER pAdapter = (PVBOXWDDMDISP_ADAPTER)RTMemAllocZ(sizeof (VBOXWDDMDISP_ADAPTER));    Assert(pAdapter);    if (!pAdapter)    {        vboxVDbgPrintR((__FUNCTION__": RTMemAllocZ returned NULL\n"));        return E_OUTOFMEMORY;    }    pAdapter->hAdapter = pOpenData->hAdapter;    pAdapter->uIfVersion = pOpenData->Interface;    pAdapter->uRtVersion= pOpenData->Version;    pAdapter->RtCallbacks = *pOpenData->pAdapterCallbacks;    pOpenData->hAdapter = pAdapter;    pOpenData->pAdapterFuncs->pfnGetCaps = vboxWddmDispGetCaps;    pOpenData->pAdapterFuncs->pfnCreateDevice = vboxWddmDispCreateDevice;    pOpenData->pAdapterFuncs->pfnCloseAdapter = vboxWddmDispCloseAdapter;    pOpenData->DriverVersion = D3D_UMD_INTERFACE_VERSION;    vboxVDbgPrint(("<== "__FUNCTION__", pAdapter(0x%p)\n", pAdapter));    return S_OK;}