C# 带Winform的XNA，视口错误

我有一个winforms应用程序，它使用xna充当各种2d编辑器。我基本上有一个自定义控件，用于包装新创建的GraphicsDevice（使用面板控制柄和宽度/高度创建视口）和绘制循环

现在，每次我尝试使用此控件时，我都会收到一个异常，说：

视口无效。视口不能大于或超出当前渲染目标的边界。MinDepth和MaxDepth的值必须介于0和1之间

当我创建这样一个图形设备时，我有点困惑：

public class GraphicsDeviceBuilder
{
    private Viewport viewport;
    private PresentationParameters presentationParameters;
    private GraphicsProfile graphicsProfile;
    private GraphicsAdapter graphicsAdapter;

    private void ResetBuilder()
    {
        viewport = new Viewport(0, 0, 128, 128);
        presentationParameters = new PresentationParameters();
        presentationParameters.BackBufferFormat = SurfaceFormat.Color;
        presentationParameters.DepthStencilFormat = DepthFormat.Depth24;
        presentationParameters.PresentationInterval = PresentInterval.Immediate;
        presentationParameters.IsFullScreen = false;
        graphicsProfile = GraphicsProfile.Reach;
        graphicsAdapter = GraphicsAdapter.DefaultAdapter;
    }

    public GraphicsDeviceBuilder Create()
    {
        ResetBuilder();
        return this;
    }

    public GraphicsDeviceBuilder WithViewport(Viewport viewport)
    {
        this.viewport = viewport;
        return this;
    }

    public GraphicsDeviceBuilder WithPresentationParameters(PresentationParameters presentationParameters)
    {
        this.presentationParameters = presentationParameters;
        return this;
    }

    public GraphicsDeviceBuilder WithGraphicsProfile(GraphicsProfile graphicsProfile)
    {
        this.graphicsProfile = graphicsProfile;
        return this;
    }

    public GraphicsDeviceBuilder WithGraphicsAdapter(GraphicsAdapter graphicsAdapter)
    {
        this.graphicsAdapter = graphicsAdapter;
        return this;
    }

    public GraphicsDevice Build(IntPtr handle)
    {
        presentationParameters.DeviceWindowHandle = handle;
        presentationParameters.BackBufferWidth = viewport.Width;
        presentationParameters.BackBufferHeight = viewport.Height;
        return new GraphicsDevice(graphicsAdapter, graphicsProfile, presentationParameters)
        {
            Viewport = viewport
        };
    }
}

然后在封装此创建设备的面板中：

private void SetupGraphics(GraphicsDeviceBuilder graphicsDeviceBuilder)
{
    var viewport = new Viewport()
    {
        X = 0,
        Y = 0,
        Width = Math.Max(Width, 1),
        Height = Math.Max(Height, 1),
        MinDepth = 0.0f,
        MaxDepth = 1.0f
    };
    GraphicsDevice = graphicsDeviceBuilder.Create().WithViewport(viewport).Build(Handle);
}

我还有一个方法，可以在调整表单大小时重置（）GraphicsDevice，如果需要，还可以更新高度/宽度，如下所示：

private void ResetDevice()
{
    if (GraphicsDevice.GraphicsDeviceStatus == GraphicsDeviceStatus.Lost)
    { throw new DeviceLostException("Cannot regain access to video hardware"); }

    var safeWidth = Math.Max(Width, 1);
    var safeHeight = Math.Max(Height, 1);
    var newViewport = new Viewport(0, 0, safeWidth, safeHeight) { MinDepth = 0.0f, MaxDepth = 1.0f };

    GraphicsDevice.Viewport = newViewport;
    GraphicsDevice.PresentationParameters.BackBufferWidth = newViewport.Width;
    GraphicsDevice.PresentationParameters.BackBufferHeight = newViewport.Height;
    GraphicsDevice.PresentationParameters.DeviceWindowHandle = Handle;
    GraphicsDevice.Reset();
}

private void ResetDevice()
{
    var safeWidth = Math.Max(Width, 1);
    var safeHeight = Math.Max(Height, 1);
    var newViewport = new Viewport(0, 0, safeWidth, safeHeight) { MinDepth = 0.0f, MaxDepth = 1.0f };

    var presentationParams = GraphicsDevice.PresentationParameters;
    presentationParams.BackBufferWidth = safeWidth;
    presentationParams.BackBufferHeight = safeHeight;
    presentationParams.DeviceWindowHandle = Handle;
    GraphicsDevice.Reset(presentationParams);

    GraphicsDevice.Viewport = newViewport;

    if (GraphicsDevice.GraphicsDeviceStatus == GraphicsDeviceStatus.Lost)
    { throw new DeviceLostException("Cannot regain access to video hardware"); }
}

该错误意味着视口的大小无效（调试时，该大小与面板的大小匹配，因此为假），并且深度无效，但正如您所看到的，它被设置为0和1，使其在范围内（调试也证明这是真的）

---

在运行时，我没有收到设计器中的错误，但我只是在面板上看到一个红色的十字，让我觉得它也不工作。

我改变了一些事情，但对我来说，问题似乎是我在重置之前设置了视口，我还需要将PresentationParameters传递到reset方法中，否则它们没有效果，所以类似这样：

private void ResetDevice()
{
    if (GraphicsDevice.GraphicsDeviceStatus == GraphicsDeviceStatus.Lost)
    { throw new DeviceLostException("Cannot regain access to video hardware"); }

    var safeWidth = Math.Max(Width, 1);
    var safeHeight = Math.Max(Height, 1);
    var newViewport = new Viewport(0, 0, safeWidth, safeHeight) { MinDepth = 0.0f, MaxDepth = 1.0f };

    GraphicsDevice.Viewport = newViewport;
    GraphicsDevice.PresentationParameters.BackBufferWidth = newViewport.Width;
    GraphicsDevice.PresentationParameters.BackBufferHeight = newViewport.Height;
    GraphicsDevice.PresentationParameters.DeviceWindowHandle = Handle;
    GraphicsDevice.Reset();
}

private void ResetDevice()
{
    var safeWidth = Math.Max(Width, 1);
    var safeHeight = Math.Max(Height, 1);
    var newViewport = new Viewport(0, 0, safeWidth, safeHeight) { MinDepth = 0.0f, MaxDepth = 1.0f };

    var presentationParams = GraphicsDevice.PresentationParameters;
    presentationParams.BackBufferWidth = safeWidth;
    presentationParams.BackBufferHeight = safeHeight;
    presentationParams.DeviceWindowHandle = Handle;
    GraphicsDevice.Reset(presentationParams);

    GraphicsDevice.Viewport = newViewport;

    if (GraphicsDevice.GraphicsDeviceStatus == GraphicsDeviceStatus.Lost)
    { throw new DeviceLostException("Cannot regain access to video hardware"); }
}

---

我已经改变了一些事情，但对我来说，问题似乎围绕着这样一个事实：我在重置之前设置了视口，并且我还需要将PresentationParameters传递到重置方法中，否则它们没有效果，所以类似这样的事情：

private void ResetDevice()
{
    if (GraphicsDevice.GraphicsDeviceStatus == GraphicsDeviceStatus.Lost)
    { throw new DeviceLostException("Cannot regain access to video hardware"); }

    var safeWidth = Math.Max(Width, 1);
    var safeHeight = Math.Max(Height, 1);
    var newViewport = new Viewport(0, 0, safeWidth, safeHeight) { MinDepth = 0.0f, MaxDepth = 1.0f };

    GraphicsDevice.Viewport = newViewport;
    GraphicsDevice.PresentationParameters.BackBufferWidth = newViewport.Width;
    GraphicsDevice.PresentationParameters.BackBufferHeight = newViewport.Height;
    GraphicsDevice.PresentationParameters.DeviceWindowHandle = Handle;
    GraphicsDevice.Reset();
}

private void ResetDevice()
{
    var safeWidth = Math.Max(Width, 1);
    var safeHeight = Math.Max(Height, 1);
    var newViewport = new Viewport(0, 0, safeWidth, safeHeight) { MinDepth = 0.0f, MaxDepth = 1.0f };

    var presentationParams = GraphicsDevice.PresentationParameters;
    presentationParams.BackBufferWidth = safeWidth;
    presentationParams.BackBufferHeight = safeHeight;
    presentationParams.DeviceWindowHandle = Handle;
    GraphicsDevice.Reset(presentationParams);

    GraphicsDevice.Viewport = newViewport;

    if (GraphicsDevice.GraphicsDeviceStatus == GraphicsDeviceStatus.Lost)
    { throw new DeviceLostException("Cannot regain access to video hardware"); }
}