在Mac OS上不支持Java頁面翻轉？

Question

我希望有人碰巧遇到了以下問題。

我的Java應用程序在Mac上有圖形性能問題，所以我做了一個簡單的測試應用程序（下面的代碼）。當我在Windows上運行此，控制檯告訴我：

的GraphicsConfiguration翻轉？真
BufferStrategy翻轉？真正

當我運行在Mac OS完全相同的代碼，我得到：

的GraphicsConfiguration翻轉？真
BufferStrategy翻轉？假

這是否意味着在Mac OS上，在窗口應用程序中不支持翻頁？是否有任何技巧可以使頁面在Mac OS上無需全屏翻動？

所有指針都非常歡迎，
Mattijs

在Windows XP和Mac OS 10.5使用JDK 1.6。

代碼：

import java.awt.image.BufferStrategy; 
import javax.swing.*; 
import java.awt.*; 

public class Test { 
int width = 640; 
int height = 480; 

GraphicsEnvironment graphEnv = GraphicsEnvironment.getLocalGraphicsEnvironment(); 
GraphicsDevice graphDevice = graphEnv.getDefaultScreenDevice(); 
GraphicsConfiguration graphicConf = graphDevice.getDefaultConfiguration(); 

public Test() { 
    JFrame jFrame = new JFrame(graphicConf); 
    jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    jFrame.setTitle("double buffer test"); 
    jFrame.setResizable(false); 
    jFrame.setFocusTraversalKeysEnabled(false); 

    Canvas canvas = new Canvas(); 
    canvas.setSize(width, height); 
    canvas.setIgnoreRepaint(true); 

    jFrame.getContentPane().add(canvas); 
    jFrame.pack(); 
    jFrame.setVisible(true); 

    System.out.println("GraphicsConfiguration flipping? " + graphicConf.getBufferCapabilities().isPageFlipping()); 
    canvas.createBufferStrategy(2); 
    BufferStrategy bufferStrategy = canvas.getBufferStrategy(); 
    System.out.println("BufferStrategy flipping? " + bufferStrategy.getCapabilities().isPageFlipping()); 

    while(true) { 
    Graphics g = bufferStrategy.getDrawGraphics(); 
    g.setColor(Color.BLACK); 
    g.fillRect(0,0,width,height); 
    g.setColor(Color.RED); 
    g.drawLine((int)(Math.random()*width),(int)(Math.random()*height), 
       (int)(Math.random()*width),(int)(Math.random()*height)); 
    bufferStrategy.show(); 
    g.dispose(); 
    } 
} 

public static void main(String[] args) { 
    new Test(); 
} 
} 

Answer 1

壞消息是：我得到同樣的Mac OS X配置了相同的結果。好消息是：isAccelerated()是真的。

System.out.println("BufferStrategy accelerated? " + bufferStrategy 
    .getCapabilities().getFrontBufferCapabilities().isAccelerated()); 

代替Canvas和BufferStrategy，我只是用new JPanel(true)。

附錄：例如，

import java.awt.Color; 
import java.awt.Dimension; 
import java.awt.EventQueue; 
import java.awt.Graphics; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.util.Random; 
import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.Timer; 

public class NewTest extends JPanel implements ActionListener, Runnable { 

    private Random r = new Random(); 
    private Timer t = new Timer(10, this); 

    public static void main(String[] args) { 
     EventQueue.invokeLater(new NewTest()); 
    } 

    @Override 
    public void run() { 
     JFrame f = new JFrame("NewTest"); 
     f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     f.add(this); 
     f.pack(); 
     f.setLocationRelativeTo(null); 
     f.setVisible(true); 
     t.start(); 
    } 

    public NewTest() { 
     super(true); 
     this.setPreferredSize(new Dimension(640, 480)); 
    } 

    @Override 
    protected void paintComponent(Graphics g) { 
     int width = this.getWidth(); 
     int height = this.getHeight(); 
     g.setColor(Color.BLACK); 
     g.fillRect(0, 0, width, height); 
     g.setColor(Color.RED); 
     g.drawLine(r.nextInt(width), r.nextInt(height), 
      r.nextInt(width), r.nextInt(height)); 

    } 

    @Override 
    public void actionPerformed(ActionEvent e) { 
     this.repaint(); 
    } 
}