D3D12可以枚举取到适配器但不能取到输出。

Question

    for (int i = 0; factory->EnumAdapters(i, &adapter) != DXGI_ERROR_NOT_FOUND; ++i) 
    {
        //创建一个Direct3D 12 设备
        result = D3D12CreateDevice(adapter, featureLevel, __uuidof(ID3D12Device), (void**)&m_device);
        if (SUCCEEDED(result)) 
        {
            break;
        }
    }
    if (FAILED(result))
    {
        MessageBox(hwnd, L"Could not create a DirectX 12.1 device.The default video card does not support DirectX 12.1", L"DirectX Device Failure", MB_OK);
        return false;
    }
    //枚举主适配器输出
    result = adapter->EnumOutputs(0, &adapterOutput);
    if (FAILED(result))
    {
        return false;
    }

笔记本电脑有一块集显和一块独显，在第三次调用factory->EnumAdapters返回了ok，但是在下边调用adapter->EnumOutputs时，adapterOutput为NULL，这是为什么？

Answer 1

http://blog.csdn.net/tcx19900712/article/details/19846369