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For quite a long time, 1-2 months, I have been trying to find an answer to this particular problem:

I can't get my image hardware accelerated!

I've been searching on the net, created my own methods, hit my head with the keyboard (still feel the pain) but no success.

Although I hate libraries other than Java SDK, I tried LWJGL and JOGL but for some stupid reason they dont work on my computer.

I tried using System.setProperty("Dsun.java2d.opengl", "True"), I used VolatileImage but I can't draw individual pixels to it.(I tried using drawLine(x,y,x,y) but it's slow)

Now I am so desperate. I will do anything to fix this! So please, if you know the solution (I know some of you do) tell me so I can get rid of this.

My code:

   public static void render(int x, int y, int w, int h, ) {

            int a[] = new int[3]; // The array that contains RGB values for every pixel
            BufferedImage bImg = Launcher.contObj.getGraphicsConfiguration().createCompatibleImage(800, 600, Transparency.TRANSLUCENT); // Creates an image compatible to my JPanel (Runs at 20-24 FPS on 800x600 resolution)
            int[] wr = ((DataBufferInt) bImg.getRaster().getDataBuffer()).getData(); // Contains the image data, used for drawing pixels
            for (int i = 0; i < bImg.getWidth(); i++) {
                for (int j = 0; j < bImg.getHeight(); j++) {
                    a[0] = i % 256;
                    a[2] = j % 256;
                    a[1] = i * j % 256;
                    wr[i + j * bImg.getWidth()] = new Color(a[0], a[1], a[2]).getRGB(); // Sets the pixels from a[]
                }
            }
            bImg.flush();
            g.drawImage(bImg, x, y, w, h, null); // Draws the image on the JPanel
            g.dispose();
            System.out.println(bImg.getCapabilities(Launcher.contObj.getGraphicsConfiguration()).isAccelerated()); // Prints out whether I was successful and made the image accelerated or failed and made everything worse
        }

I hope you understand the code. Please modify it in any way to help me find the solution to my problems.

Note: Please don't post anything about external libraries unless you are absolutely sure that I can't get this working without them.

Also, could it be that my graphics card doesn't support acceleration? (because I saw posts where hardware accel works for other people but not for me) Btw, it's a GeForce 430 GT.

THANKS IN ADVANCE!

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1 回答 1

4

来源复制自：Java 硬件加速不适用于英特尔集成显卡

尝试这个：

package graphicstest;

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

public class GraphicsTest extends JFrame {

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new GraphicsTest();
            }
        });
    }

    GraphicsConfiguration gc = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
    BufferCapabilities bufferCapabilities;
    BufferStrategy bufferStrategy;

    int y = 0;
    int delta = 1;

    public GraphicsTest() {

        setTitle("Hardware Acceleration Test");
        setSize(500, 300);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        setVisible(true);

        createBufferStrategy(2);
        bufferStrategy = getBufferStrategy();

        bufferCapabilities = gc.getBufferCapabilities();

        new AnimationThread().start();
    }

    class AnimationThread extends Thread {
        @Override
        public void run() {

            while(true) {
                Graphics2D g2 = null;
                try {
                    g2 = (Graphics2D) bufferStrategy.getDrawGraphics();
                    draw(g2);
                } finally {
                    if(g2 != null) g2.dispose();
                }
                bufferStrategy.show();

                try {
                    // CHANGE HERE, DONT SLEEP
                    //Thread.sleep(16);
                } catch(Exception err) {
                    err.printStackTrace();
                }
            }
        }
    }

    public void draw(Graphics2D g2) {
        if(!bufferCapabilities.isPageFlipping() || bufferCapabilities.isFullScreenRequired()) {
            g2.setColor(Color.black);
            g2.fillRect(0, 0, getWidth(), getHeight());
            g2.setColor(Color.red);
            g2.drawString("Hardware Acceleration is not supported...", 100, 100);
            g2.setColor(Color.white);
            g2.drawString("Page Flipping: " + (bufferCapabilities.isPageFlipping() ? "Available" : "Not Supported"), 100, 130);
            g2.drawString("Full Screen Required: " + (bufferCapabilities.isFullScreenRequired() ? "Required" : "Not Required"), 100, 160);
            g2.drawString("Multiple Buffer Capable: " + (bufferCapabilities.isMultiBufferAvailable() ? "Yes" : "No"), 100, 190);
        } else {
            g2.setColor(Color.black);
            g2.fillRect(0, 0, getWidth(), getHeight());
            g2.setColor(Color.white);
            g2.drawString("Hardware Acceleration is Working...", 100, 100);
            g2.drawString("Page Flipping: " + (bufferCapabilities.isPageFlipping() ? "Available" : "Not Supported"), 100, 130);
            g2.drawString("Full Screen Required: " + (bufferCapabilities.isFullScreenRequired() ? "Required" : "Not Required"), 100, 160);
            g2.drawString("Multiple Buffer Capable: " + (bufferCapabilities.isMultiBufferAvailable() ? "Yes" : "No"), 100, 190);
        }

        y += delta;
        if((y + 50) > getHeight() || y < 0) {
            delta *= -1;
        }

        g2.setColor(Color.blue);
        g2.fillRect(getWidth()-50, y, 50, 50);
    }
}

输出我得到硬件加速不可用。java.exe 占用了 12% 的 CPU。700 帧/秒

然后我添加了系统变量：

Variable name: J2D_D3D_NO_HWCHECK
         Variable value: true

然后重新启动IDE，并运行程序：

我得到了惊人的结果。我有可用的硬件加速。java.exe 占用了 5% 的 CPU。1700 帧/秒。动画很棒！

以上是检查硬件加速是否在您的系统中工作。

现在回答你的问题：

AFAIK：您无法使用 BufferedImage 获得真正的硬件加速。您应该使用 VolatileImage 来获得硬件加速。但是使用 VolatileImage，您无法获取像素数据缓冲区来修改像素。并且使用硬件逐像素渲染是没有意义的。

我的建议：

1）设计你的逻辑，它可以使用易失性图像的 Graphics 和 Graphics2D 渲染像素。但是不要像画 1 像素的线条那样做黑客。

2）使用缓冲策略，双/三缓冲。

3）如果您想坚持使用 BufferedImage 来设置每个像素，请使用 BufferedImage 作为数据模型，同时在 volatile 图像上绘制绘制缓冲图像。如果您正在缩放图像，这将有很大帮助。

4）缓存频繁渲染的图像。

5）更好地编写代码，例如：

int wi = bImg.getWidth();
int he = bImg.getHeight();
for (int i = 0; i < wi; i++) {
    for (int j = 0; j < he; j++) {
        wr[i + j * wi] = ((i % 256) << 16) | ((i * j % 256) << 8) | (j % 256);
    }
}

6) 对于 sqrt()、sin()、cos() 等耗时的数学运算，缓存这些运算的结果并创建查找表。

于 2013-10-17T16:02:37.960 回答