public MemMusic getInstance(){return new MemMusic(left,right,mixer,lengthSeconds);}

        public MemSound getInstance(){return new MemSound(left,right,mixer,tinysound.TinySound.getSoundID(),lengthSeconds);}

public class Zoom_canvas extends Canvas {
    
    
      

    protected BufferStrategy buffer;  //BufferStratrgy
    protected VolatileImage dbImage ; //VolatileImage as intermediate buffer
 
    

    public Zoom_canvas() {   //constructor
        this.setIgnoreRepaint(true); //we repaint manually
        this.setFocusable(false);

        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsConfiguration gc = ge.getDefaultScreenDevice().getDefaultConfiguration();
        dbImage = gc.createCompatibleVolatileImage(this.getWidth, this.getHeight, Transparency.TRANSLUCENT); //initialize the VolatileImage
    }

    public void dispose() {
        buffer.dispose();
    }

    public void Init() { //call this before starting game loop, it initializes the bufferStrategy
        createBufferStrategy(2);  //double buffering
        buffer = getBufferStrategy();
    }

    public void PerformDraw() {  //public drawing method, call this from your game loop for update image

        Graphics g;
        try {
            g = buffer.getDrawGraphics();
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }
        this.paint((Graphics2D) g);
        g.dispose();

        if (!buffer.contentsLost()) {
            buffer.show();
        }
    }

    private void paint(Graphics2D g) { //real drawing method

        super.paint(g);

        Graphics2D ga = (Graphics2D) dbImage.getGraphics();
        ga.setBackground(new Color(0, 0, 0, 0));
        ga.clearRect(0, 0, dbImage.getWidth(), dbImage.getHeight()); // we clear the intermediate buffer

//===============================        
//... TO DO, ADD dome drawing here using "ga"!!!
//===============================
        ga.dispose();

        g.drawImage(dbImage, 0, 0, null);
        g.dispose();
    }
}