.net 如何在 NET 5 6 中使用 Direct3D11CaptureFramePool

Alternative title: WinRT support for IDirect3DDevice

我有一个应用程序，它使用"Direct3D11CaptureFramePool"类来捕获应用程序窗口的内容，如下所示(link)

我想把这个例子移植到Net6.0

这里介绍了如何移植WinRT代码

How can i port this code to NET 6.0

    uint hr = CreateDirect3D11DeviceFromDXGIDevice(dxgiDevice.NativePointer, out IntPtr pUnknown);
    if (hr == 0)
    {
        device = Marshal.GetObjectForIUnknown(pUnknown) as IDirect3DDevice;
        Marshal.Release(pUnknown);
    }

IDrect3DDEvice没有FromAbi方法，如here所述

Edit:

我有接口类型，我有一个指向IUnknown对象的指针，但我无法获取实例，因为为IUnknown指针获取对象的代码已更改.没有 Windows.Graphics.DirectX.Direct3D11.IDirect3DDevice.FromAbi(pUnknown)个

Edit 2:

我创建了一个回购示例来重现这个问题:

这段代码适用于Net4.8，但不适用于Net6.我相信，因为

internal class Program
{

[DllImport(
        "d3d11.dll",
        EntryPoint = "CreateDirect3D11DeviceFromDXGIDevice",
        SetLastError = true,
        CharSet = CharSet.Unicode,
        ExactSpelling = true,
        CallingConvention = CallingConvention.StdCall
        )]
static extern UInt32 CreateDirect3D11DeviceFromDXGIDevice(IntPtr dxgiDevice, out IntPtr graphicsDevice);

static void Main(string[] args)
{

    using var sharpDxDevice = new SharpDX.Direct3D11.Device(SharpDX.Direct3D.DriverType.Hardware, SharpDX.Direct3D11.DeviceCreationFlags.BgraSupport);
    IDirect3DDevice direct3dDevice = CreateDirect3DDeviceFromSharpDXDevice(sharpDxDevice);

    // this will throw internal cast exception 
    using var framePool = Direct3D11CaptureFramePool.CreateFreeThreaded(
                        direct3dDevice,
                        DirectXPixelFormat.B8G8R8A8UIntNormalized,
                        2,
                        new SizeInt32(64, 64));

}

private static IDirect3DDevice CreateDirect3DDeviceFromSharpDXDevice(SharpDX.Direct3D11.Device sharpDxDevice)
{
    IDirect3DDevice device = null;
    using (var dxgiDevice = sharpDxDevice.QueryInterface<SharpDX.DXGI.Device3>())
    {
        uint hr = CreateDirect3D11DeviceFromDXGIDevice(dxgiDevice.NativePointer, out IntPtr pUnknown);
        if (hr == 0)
        {
            // with NET 6 there should be something like 
            // IDirect3DDevice.FromAbi(pUnknown)
            // see here https://github.com/microsoft/CsWinRT/blob/master/docs/interop.md#create-rcw
            device = Marshal.GetObjectForIUnknown(pUnknown) as IDirect3DDevice;
            Marshal.Release(pUnknown);
        }
    }
    return device;
}
}