Question

对于我的游戏，我绘制到java.awt.Image然后将图像绘制到JPanel上。我之所以这样做有几个原因，主要是因为我不希望游戏渲染在EDT上占用cpu周期，以及便携性。

使用

时出现导致java.awt.JPanel闪烁的问题

graphics＃drawImage（Image img，int x，int y，int width，int height， ImageObserver观察者）

然而，

graphics＃drawImage（Image img，int x，int y，ImageObserver observer）

没有引起这个问题。

这是我的代码：

Sandbox.java

public class Sandbox implements Paintable {

public static void main(String[] args) throws Exception {
    GameWindow window = new GameWindow("Test", 800, 600);
    GameScreen screen = new GameScreen(800, 600);
    Sandbox sandbox = new Sandbox();

    window.add(screen);
    window.setVisible(true);

    boolean running = true;
    while(running) {
        sandbox.update();
        screen.getPaintBuffer().clear();
        screen.getPaintBuffer().paint(sandbox);
        screen.repaint();
        Thread.sleep(1000 / 60);
    }

}

private int x = 0, y = 0;

public void update() {
    x++;
    y++;
}

public void paint(Graphics g) {
    g.drawRect(x, y, 50, 50);
}

}

GameWindow.java

public class GameWindow extends JFrame {

public GameWindow(String title, int width, int height) {
    setTitle(title);
    setSize(width, height);
    setResizable(false);
    setLocationByPlatform(true);
    setDefaultCloseOperation(3);
}

}

GameScreen.java

public class GameScreen extends JPanel {

private ImageBuffer buffer;

public GameScreen(int width, int height) {
    buffer = new ImageBuffer(width, height);
}

public void paint(Graphics g) {
    g.drawImage(getPaintBuffer().getBuffer(), 0, 0, getWidth(), getHeight(), null);
}

public ImageBuffer getPaintBuffer() {
    return buffer;
}

}

Paintable.java

public interface Paintable {

public void paint(Graphics g);

}

ImageBuffer.java

public class ImageBuffer {

private final Image buffer;
private int width, height;

public ImageBuffer(int width, int height) {
    buffer = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
    this.width = width;
    this.height = height;
}

public void paint(Paintable paintable) {
    paintable.paint(buffer.getGraphics());
}

public void clear() {
    buffer.getGraphics().clearRect(0, 0, width, height);
}

public Image getBuffer() {
    return buffer;
}

}

Answer 1

将GameScreen的{{1}}方法更改为...

改为覆盖paint
致电paintComponent以维持油漆连锁店的合约
将super.paintComponent作为this参数传递给ImageObsever

例如......

drawImage

请查看Painting in AWT and Swing和Performing Custom Painting，了解有关绘画如何运作的详细信息

<强>更新

基本问题是缩放问题......

您用来绘制的图片是public class GameScreen extends JPanel { private ImageBuffer buffer; public GameScreen(int width, int height) { buffer = new ImageBuffer(width, height); } @Override protected void paintComponent(Graphics g) { super.paintComponent(g); g.drawImage(getPaintBuffer().getBuffer(), 0, 0, getWidth(), getHeight(), this); } public ImageBuffer getPaintBuffer() { return buffer; } }，但800x600实际上是GameScreen（在我的电脑上），这会导致图像缩放。现在，Swing的默认缩放比例并不高，一般都是基于速度而非质量。

现在，有很多方法可以改善这一点，但快速的方法是应用一些更高的渲染提示，例如

794x572

现在，我已经过度使用了这个，所以你可能想删除一些，看看有什么变化

<强>更新

渲染提示可能会降低渲染过程的速度，因此更好的解决方案可能会覆盖@Override protected void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2d = (Graphics2D) g.create(); g2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY); g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY); g2d.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_ENABLE); g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON); g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR); g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY); g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE); g2d.drawImage(getPaintBuffer().getBuffer(), 0, 0, getWidth(), getHeight(), this); g2d.dispose(); }的{{1}}方法并返回预期的大小

getPreferredSize

然后，而不是将大小传递给GameScreen，只需调用public static class GameScreen extends JPanel { private ImageBuffer buffer; private Dimension size; public GameScreen(int width, int height) { buffer = new ImageBuffer(width, height); this.size = new Dimension(width, height); } @Override public Dimension getPreferredSize() { return new Dimension(800, 600); }

GameWindow

这样，每个人都有相同的规模

JPanel闪烁问题

1 个答案: