好吧，这是一篇旧文章，但我想分享一下我对使用 Swing/AWT 直接绘图的发现，而无需使用 BufferedImage。
直接绘制到int[]缓冲区时，某些类型的绘图（如 3D）会更好。完成图像后，您可以使用ImageProducer实例（如MemoryImageSource）来生成图像。我假设您知道如何直接执行绘图，而无需 Graphics/Graphics2 的帮助。
/**
* How to use MemoryImageSource to render images on JPanel
* Example by A.Borges (2015)
*/
public class MyCanvas extends JPanel implements Runnable {
public int pixel[];
public int width;
public int height;
private Image imageBuffer;
private MemoryImageSource mImageProducer;
private ColorModel cm;
private Thread thread;
public MyCanvas() {
super(true);
thread = new Thread(this, "MyCanvas Thread");
}
/**
* Call it after been visible and after resizes.
*/
public void init(){
cm = getCompatibleColorModel();
width = getWidth();
height = getHeight();
int screenSize = width * height;
if(pixel == null || pixel.length < screenSize){
pixel = new int[screenSize];
}
mImageProducer = new MemoryImageSource(width, height, cm, pixel,0, width);
mImageProducer.setAnimated(true);
mImageProducer.setFullBufferUpdates(true);
imageBuffer = Toolkit.getDefaultToolkit().createImage(mImageProducer);
if(thread.isInterrupted() || !thread.isAlive()){
thread.start();
}
}
/**
* Do your draws in here !!
* pixel is your canvas!
*/
public /* abstract */ void render(){
// rubisch draw
int[] p = pixel; // this avoid crash when resizing
if(p.length != width * height) return;
for(int x=0; x < width; x++){
for(int y=0; y<height; y++){
int color = (((x + i) % 255) & 0xFF) << 16; //red
color |= (((y + j) % 255) & 0xFF) << 8; //green
color |= (((y/2 + x/2 - j) % 255) & 0xFF) ; //blue
p[ x + y * width] = color;
}
}
i += 1;
j += 1;
}
private int i=1,j=256;
@Override
public void run() {
while (true) {
// request a JPanel re-drawing
repaint();
try {Thread.sleep(5);} catch (InterruptedException e) {}
}
}
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
// perform draws on pixels
render();
// ask ImageProducer to update image
mImageProducer.newPixels();
// draw it on panel
g.drawImage(this.imageBuffer, 0, 0, this);
}
/**
* Overrides ImageObserver.imageUpdate.
* Always return true, assuming that imageBuffer is ready to go when called
*/
@Override
public boolean imageUpdate(Image image, int a, int b, int c, int d, int e) {
return true;
}
}// end class
请注意，我们需要MemoryImageSource和Image的唯一实例。不要为每个帧创建新的 Image 或新的 ImageProducer，除非您调整了 JPanel 的大小。请参见上面的init()方法。
在渲染线程中，询问repaint()。在 Swing 上，repaint()将调用被覆盖的paintComponent()，它会调用您的render()方法，然后要求您的 imageProducer 更新图像。完成 Image 后，使用Graphics.drawImage()绘制它。
要获得兼容的 Image，请在创建Image时使用正确的ColorModel。我使用GraphicsConfiguration.getColorModel()：
/**
* Get Best Color model available for current screen.
* @return color model
*/
protected static ColorModel getCompatibleColorModel(){
GraphicsConfiguration gfx_config = GraphicsEnvironment.
getLocalGraphicsEnvironment().getDefaultScreenDevice().
getDefaultConfiguration();
return gfx_config.getColorModel();
}