c# - XNA 4.0 SpriteBatch.Draw 抛出内存不足异常

Question

嗯，首先，我的猜测是我多次调用 spritebatch.draw() 方法，但我需要(或者，这是我能弄清楚的唯一方法如何)绘制我的游戏内窗口。我将继续并转储我的代码。

我的窗口类；

using System;
using System.Text;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;


namespace System.Window
{
class Window
{
    #region Variables

    public Texture2D importedTexture;
    public Texture2D WindowSkin;
    public RenderTarget2D currentWindow;
    public RenderTarget2D windowTexture;

    public Vector2 pos;

    public int prevWindowWidth;
    public int prevWindowHeight;
    public int windowWidth;
    public int windowHeight;

    public bool visible;
    public bool active;
    public bool drawNew;

    #region Rectangles

    public Rectangle clickRect;
    public Rectangle topLeftRect;
    public Rectangle topRightRect;
    public Rectangle buttonRect;
    public Rectangle botLeftRect;
    public Rectangle botRightRect;


    #endregion

    #endregion

    public Window()
    {

    }

    public void Initialize(GraphicsDevice g, Texture2D ws, Texture2D it, int w, int h, bool v, bool a)
    {
        WindowSkin = ws;
        importedTexture = it;

        windowWidth = w;
        prevWindowWidth = w;

        windowHeight = h;
        prevWindowHeight = h;

        windowTexture = new RenderTarget2D(g, windowWidth, windowHeight);
        currentWindow = windowTexture;

        visible = v;
        active = a;

        drawNew = true;

        topLeftRect = new Rectangle(0, 0, 32, 32);
        topRightRect = new Rectangle(32, 0, 32, 32);
        buttonRect = new Rectangle(64, 0, 32, 32);
        botLeftRect = new Rectangle(0, 64, 32, 32);
        botRightRect = new Rectangle(64, 64, 32, 32);

    }

    public void Update(GraphicsDevice g, Vector2 p, int width, int height)
    {
        prevWindowWidth = windowWidth;
        prevWindowHeight = windowHeight;

        pos = p;
        windowWidth = width;
        windowHeight = height;
        windowTexture = new RenderTarget2D(g, windowWidth+2, windowHeight+2);

    }

    public void Draw(SpriteBatch s, GraphicsDevice g)
    {


        s.Draw(currentWindow, pos, new Rectangle(0, 0, windowWidth, windowHeight), Color.White, 0, Vector2.Zero, 1.0f, SpriteEffects.None, 0);

    }

    public void DrawNewWindow(SpriteBatch s, GraphicsDevice g)
    {

            g.SetRenderTarget(windowTexture);
            g.Clear(Color.Transparent);

            s.Begin();

            #region Draw Background

            for (int w = 3; w < (windowWidth); w += 32)
            {
                for (int h = 32; h < (windowHeight); h += 32)
                {
                    s.Draw(WindowSkin, new Vector2(w, h), new Rectangle(32, 32, 32, 32), Color.White, 0, Vector2.Zero, 1.0f, SpriteEffects.None, 0);
                }
            }

            #endregion

            s.Draw(importedTexture, new Vector2(3, 32), new Rectangle(0, 0, importedTexture.Width, importedTexture.Height), Color.White, 0, Vector2.Zero, 1.0f, SpriteEffects.None, 0);


            #region Draw resizables

            for (int i = 32; i < (windowWidth - 64); i += 32)
            {
                s.Draw(WindowSkin, new Vector2(i, 0), new Rectangle(16, 0, 32, 32), Color.White, 0, Vector2.Zero, 1.0f, SpriteEffects.None, 0);
            }
            for (int i = 32; i < (windowWidth - 32); i += 32)
            {
                s.Draw(WindowSkin, new Vector2(i, windowHeight - 32), new Rectangle(32, 64, 32, 32), Color.White, 0, Vector2.Zero, 1.0f, SpriteEffects.None, 0);
            }
            for (int i = 64; i < (windowHeight - 32); i += 32)
            {
                s.Draw(WindowSkin, new Vector2(0, i), new Rectangle(0, 48, 32, 32), Color.White, 0, Vector2.Zero, 1.0f, SpriteEffects.None, 0);
            }
            for (int i = 64; i < (windowHeight - 32); i += 32)
            {
                s.Draw(WindowSkin, new Vector2(windowWidth - 32, i), new Rectangle(64, 48, 32, 32), Color.White, 0, Vector2.Zero, 1.0f, SpriteEffects.None, 0);
            }

            #endregion

            #region Draw Corners

            s.Draw(WindowSkin, new Vector2(0, 0), topLeftRect, Color.White, 0, Vector2.Zero, 1.0f, SpriteEffects.None, 0);
            s.Draw(WindowSkin, new Vector2(0, 32), new Rectangle(0, 32, 32, 32), Color.White, 0, Vector2.Zero, 1.0f, SpriteEffects.None, 0);

            s.Draw(WindowSkin, new Vector2(windowWidth - 64, 0), topRightRect, Color.White, 0, Vector2.Zero, 1.0f, SpriteEffects.None, 0);
            s.Draw(WindowSkin, new Vector2(windowWidth - 32, 32), new Rectangle(64, 32, 32, 32), Color.White, 0, Vector2.Zero, 1.0f, SpriteEffects.None, 0);

            s.Draw(WindowSkin, new Vector2(windowWidth - 32, 0), buttonRect, Color.White, 0, Vector2.Zero, 1.0f, SpriteEffects.None, 0);
            s.Draw(WindowSkin, new Vector2(0, windowHeight - 32), botLeftRect, Color.White, 0, Vector2.Zero, 1.0f, SpriteEffects.None, 0);
            s.Draw(WindowSkin, new Vector2(windowWidth - 32, windowHeight - 32), botRightRect, Color.White, 0, Vector2.Zero, 1.0f, SpriteEffects.None, 0);

            #endregion

            s.End();

            currentWindow = windowTexture;

    }
}
}

我的 Draw() 方法；

        protected override void Draw(GameTime gameTime)
    {

            window1.DrawNewWindow(spriteBatch, GraphicsDevice);
            window1.drawNew = false;


        GraphicsDevice.SetRenderTarget(null);
        GraphicsDevice.Clear(Color.CornflowerBlue);

        spriteBatch.Begin(SpriteSortMode.Deferred,
                    BlendState.AlphaBlend,
                    SamplerState.PointClamp,
                    null,
                    null,
                    null);

        window1.Draw(spriteBatch, GraphicsDevice);

        spriteBatch.End();

        base.Draw(gameTime);
    }

这一切都很好，并为我的小 windowskin 纹理等进行了配置。唯一的问题是它会变得有点迟钝，然后在运行它大约一分钟后完全崩溃。它抛出一个 Out Of Memory Exception，但我不知道也找不到任何其他主题或关于此与 spritebatch 相关的帖子。有人对我如何使它正常工作而不占用太多内存有任何建议吗？我认为这是绘制窗口的一种简单且经济高效的方法。我只是不确定如何减少我的绘制调用，或者恢复任何内存。

Answer 1

windowTexture = new RenderTarget2D(g, windowWidth+2, windowHeight+2);

可能是罪魁祸首。尽量不要在每次更新时都实例化一些新东西。它每秒发生大约 60 次，并可能导致严重的开销。改为在 Initialize 方法中初始化渲染目标。