Question

现在我使用的是来自Dummy’s guide to drawing raw images in Java 2D的代码我使用Oracle JVM，Nvidia 8600 GTS，Intel Core 2Duo 2.6 GHz在Debian i386上获得240 FPS（800x600窗口）。

存在更快的方式吗？我的代码：

import java.awt.Graphics;
import java.awt.event.*;
import java.awt.image.*;
import javax.swing.*;

public class TestFillRasterRate
{
    static class MyFrame extends JFrame
    {
      long framesDrawed;
      int col=0;

      int w, h;
      int[] raster;
      ColorModel cm;
      DataBuffer buffer;
      SampleModel sm;
      WritableRaster wrRaster;
      BufferedImage backBuffer;

      //@Override public void paint(Graphics g)
      public void draw(Graphics g)
      {
        // reinitialize all if resized
        if( w!=getWidth() || h!=getHeight() )
        {
            w = getWidth();
            h = getHeight();

            raster = new int[w*h];

            cm = new DirectColorModel(24, 255, 255<<8, 255<<16);
            buffer = new DataBufferInt(raster, raster.length);
            sm = cm.createCompatibleSampleModel(w,h);
            wrRaster = Raster.createWritableRaster(sm, buffer, null);
            backBuffer = new BufferedImage(cm, wrRaster, false, null);
        }

        // produce raster
        for(int ptr=0, x=0; x<w; x++)
            for(int y=0; y<h; y++)
              raster[ptr++] = col++;

        // draw raster
        g.drawImage(backBuffer,  0,0, null);
        ++framesDrawed;

        /**
        SwingUtilities.invokeLater(new Runnable()
        {   @Override   public void run()
            {     repaint();
            }
        });/**/
      }
    }

    public static void main(String[] args)
    {
      final MyFrame frame = new MyFrame();

        frame.setSize(800, 600);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);

        // draw FPS in title
        new Timer(1000, new ActionListener()
        {   @Override public void actionPerformed(ActionEvent e)
            {   frame.setTitle(Long.toString(frame.framesDrawed));
                frame.framesDrawed = 0;
            }
        }).start();

      /**/
      frame.createBufferStrategy(1);
      BufferStrategy bs = frame.getBufferStrategy();
      Graphics g = bs.getDrawGraphics();
      for(;;)
        frame.draw(g);
      /**/
    }
}

Answer 1

获得更多FPS的方法可能是使用BufferStrategy。您不必使用Graphics传递我的paint()方法，而是必须使用例如jFrame.createBufferStrategy(/*number of buffers*/)和BufferStrategy bufferStrategy = jFrame.getBufferStrategy（）在外部创建它们。如果您想要访问Graphics，则使用Graphics g = bufferStrategy.getDrawGraphics()，然后通常绘制您的图片。我不确定这是否会在这么简单的例子中真正改善你的FPS，但是当做更复杂的抽奖时，它肯定会。

编辑：创建一个只有1个后备缓冲区的BufferStrategy是没用的，因为它会继续直接绘制到屏幕上。缓冲区大小应为2-5，具体取决于您的图形卡可以处理多少vram。

什么是在Java中绘制像素缓冲区的最快方法

1 个答案: