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;
}