Windows Phone 7 上的 XNA 中出现横向图形故障

Question

几个月来，我一直在研究跨平台框架/抽象层，基于 WP7 的 XNA 框架和 Android 和 iOS 的 Mono。在获得了适用于 Android 的大部分功能后，我最近回到了 WP7，以便让一个简单的游戏在两个平台上都能运行。

问题是，我遇到了一个非常奇怪的图形错误。该错误不会在基于 Windows 的 XNA 游戏中发生，并且仅在方向为横向（默认或指定）时发生在 WP7 上。故障出现在模拟器上，但不在物理设备上。出于测试目的，我在红色背景上显示单个图像。

Windows XNA

Windows http://www.genius-i.com/images/Windows.png

Windows Phone 7（纵向）

Portait http://www.genius-i.com/images/Portrait.png

Windows Phone 7（横向）

Landscape http://www.genius-i.com/images/Landscape.png

显然，横向图像没有按预期显示。虽然这一切都是通过抽象层处理的，但 XNA 平台文件是相同的，Windows 和 WP7 版本之间的唯一区别是目标平台/框架。

同样，对图形设备和渲染器的调用是相同的。

构建期间（从各种类和函数中提取）

device = new Microsoft.Xna.Framework.GraphicsDeviceManager(game);
device.PreferredBackBufferHeight = 480;
device.PreferredBackBufferWidth = 800;
Backend.SupportedOrientations = DisplayOrientation.LandscapeLeft | DisplayOrientation.LandscapeRight;
// Whether or not I set the orientation, the glitchoccurs.

初始化期间（从各种类和函数中提取）

renderer = new SpriteBatch(device.GraphicsDevice);

绘图中

device.Clear(Color.Red);
renderer.Begin();
renderer.Draw(ZNGTexture, new Rectangle(10, 400, 145, 66), null, Color.White, 0f, Vector.Zero, SpriteEffects.none, 0f);
renderer.End()

是否有人对可能导致图形故障的原因（例如我所描述的故障）有任何见解？

感谢您提供的任何帮助，很抱歉在几天之内提出第二个问题。

完整代码

为了帮助识别问题，我提供了大量的实际代码。我最初排除它是因为它有点长，而且这些类是 XNA 大部分功能的简单包装器。

游戏类

public class Game : Microsoft.Xna.Framework.Game, IGame
{
    #region Data: Fields

    private GraphicsBackendXNA graphics;
    private Renderer2DXNA renderer;
    ContentLoaderXNA content;

    #endregion

    #region Data: Properties

    public GraphicsBackend Backend { get { return graphics; } }
    public Renderer2D Renderer { get { return renderer; } }
    public ContentLoader Loader { get { return content; } }

    #endregion

    #region Methods: Construction

    public Game()
    {
        graphics = new GraphicsBackendXNA(this);
        content = new ContentLoaderXNA(this.Services, "Content");
        FinaliseConstruction();
    }

    protected virtual void FinaliseConstruction() { }

    #endregion

    #region Methods: Initialisation

    protected override void Initialize()
    {
        Core.Console.Initialise(); // Initialised once for error logging.
        base.Initialize();
        renderer = new RendererXNA(graphics);
        Core.Console.Initialise(renderer); // Initialised a second time for graphics services.

        Transform.ScreenSize = new Vector2(Backend.ScreenWidth, Backend.ScreenHeight);

        Core.Audio.MediaPlayer.Initialise(new Audio.MediaHandler());
        Core.Audio.SoundEffect.Initialise(Audio.SoundEffectXNA.SetVolume);

        Core.Input.Input.Set(new KeyboardReaderXNA(), new MouseReaderXNA(), new GamePadReaderXNA(), new Input.Touch.TouchPanelXNA(), new GamePadOutputXNA());
        Core.Input.InputManager.Initialise();
    }

    #endregion

    #region Methods: Loading and Unloading Content

    protected override void UnloadContent()
    {
        content.Unload();
        base.UnloadContent();
    }

    #endregion

    #region Methods: Drawing

    protected override void EndDraw()
    {
        Camera2D.AllOff();
        base.EndDraw();
    }

    #endregion

图形后端类

图形后端 (XNA) 类是一个简单的包装类。它扩展了 GraphicsBackend 类，该类是抽象的，不包含任何功能。

public class GraphicsBackendXNA : GraphicsBackend
{
    #region Data: Fields

    private Microsoft.Xna.Framework.GraphicsDeviceManager device;

    #endregion

    #region Data: Properties

    public override Display Display { get { return device.GraphicsDevice.PresentationParameters.ToHeron(); } }
    public override Core.Graphics.Viewport Viewport { get { return device.GraphicsDevice.Viewport.ToHeron(); } }

    public override int ScreenWidth { get { return device.PreferredBackBufferWidth; } set { device.PreferredBackBufferWidth = value; } }
    public override int ScreenHeight { get { return device.PreferredBackBufferHeight; } set { device.PreferredBackBufferHeight = value; } }

    public override bool IsFullScreen { get { return device.IsFullScreen; } set { device.IsFullScreen = value; } }
    public override Core.DisplayOrientation SupportedOrientations
    {
        get { return ((Core.DisplayOrientation)((int)device.SupportedOrientations); }
        set { device.SupportedOrientations = (Microsoft.Xna.Framework.DisplayOrientation)((int)value); }
    }

    #endregion

    #region Methods: Construction

    public GraphicsBackendXNA(Microsoft.Xna.Framework.Game game)
    {
        device = new Microsoft.Xna.Framework.GraphicsDeviceManager(game);
    }

    #endregion

    #region Methods: Settings

    public override void ApplyChanges()
    {
        device.ApplyChanges();
    }

    #endregion

    #region Methods: Rendering

    public override void Clear(Colour colour)
    {
        device.GraphicsDevice.Clear(new Microsoft.Xna.Framework.Color(colour.R, colour.G, colour.B, colour.A));
    }

    #endregion

    #region Methods: Renderer

    public override Renderer2D CreateRenderer() { return new Renderer2DXNA(this); }

    #endregion

渲染器 2D XNA 类

Renderer 2D XNA 类是另一个简单的包装器。它继承自 Renderer2D 基类，该基类实现了大量用于绘制内容的抽象方法。它有一些非常基本的功能，我将首先详细介绍，但我不会费心包含所有空白方法。

public class Renderer2D : IDisposable
{
    private GraphicsBackend backend;
    private Matrix currentMatrix;

    public virtual GraphicsBackend Backend { get { return backend; } protected set { backend = value; } }
    public Matrix CurrentMatrix { get { return currentMatrix; } set { currentMatrix = value; } }

    public Renderer2D(GraphicsBackend backend) { this.backend = backend; CurrentMatrix = Matrix.Identity; }
}

public class Renderer2DXNA : Renderer2D
{
    #region Static: 1 Pixel Texture

    private static Texture2D filler;
    private static bool Initialised { get { return filler != null; } }

    public static void Initialise(GraphicsBackendXNA backend)
    {
        filler = CreateFiller(backend)
    }

    private static Texture2D CreateFiller(GraphicsBackendXNA backend)
    {
        Texture2D rt = new Texture2D(backend.Device.GraphicsDevice, 1, 1);
        rt.SetData<Microsoft.Xna.Framework.Color>(new Microsoft.Xna.Framework.Color[] { Microsoft.Xna.Framework.Color.White });
        return rt;
    }

    #endregion

    #region Data: Fields

    private SpriteBatch renderer;

    #endregion

    #region Methods: Construction

    public Renderer2DXNA(GraphicsBackendXNA backend) : base(backend)
    {
        if (!Initialised)
            Initialise(backend);

        renderer = new SpriteBatch(backend.Device.GraphicsDevice);
    }

    #endregion

    #region Methods: Begin and End

    public override void Begin(Core.Graphics.SpriteSortMode sortMode, BlendMode blendMode, Core.Matrix transformMatrix)
    {
        renderer.Begin(); // Obviously not fully implemented, but simple for now.
    }

    public override void End() { renderer.End(); }

    #endregion

    #region Methods: Draw Image

    public override void Draw(Image Image, Core.Rectangle Boundary, Core.Rectangle? Source, Colour DrawColour, float RotationRadians, Core.Vector2 Origin, Core.SpriteEffects Effects, float Layer)
    {
        if (!(Image is ImageXNA))
            return;

        ImageXNA realImage = Image as ImageXNA;
        Microsoft.Xna.Framework.Rectangle finalSource = 
            Source.HasValue ? Source.Value.ToXNARectangle()
            : new Microsoft.Xna.Framework.Rectangle(0, 0, realImage.Width, realImage.Height);

        renderer.Draw(
            realImage.Texture,
            Boundary.ToXNARectangle(),
            finalSource,
            new Microsoft.Xna.Framework.Color(DrawColour.R, DrawColour.G, DrawColour.B, DrawColour.A),
            RotationRadians,
            Origin.ToXNAVector2(),
            (SpriteEffects)((int)Effects),
            Layer);
    }         

    #endregion

}
// I'll leave off string and shape drawing, considering they're not being used here.

Answer 1

在构造函数中添加 device.IsFullScreen = true; 为我解决了类似的问题。每当我尝试绘制任何东西时，我都会看到对角线的图案。

    public Game1()
    {
        graphics = new GraphicsDeviceManager(this);
        Content.RootDirectory = "Content";

        graphics.PreferredBackBufferWidth = 480;
        graphics.PreferredBackBufferHeight = 800;
        graphics.IsFullScreen = true;

        // Frame rate is 30 fps by default for Windows Phone.
        TargetElapsedTime = TimeSpan.FromTicks(333333);

        // Extend battery life under lock.
        InactiveSleepTime = TimeSpan.FromSeconds(1);
    }

Here's how my glitch looked like