public final class IndirectCanvas extends PixelCanvas implements ImageProducer, ImageObserver {
    private ColorModel model;
    private ImageConsumer consumer;

    public synchronized void addConsumer(ImageConsumer ic) {
        consumer = ic;
        ic.setDimensions(width, height);
        ic.setProperties(null);
        ic.setColorModel(model);
        ic.setHints(ImageConsumer.TOPDOWNLEFTRIGHT | ImageConsumer.COMPLETESCANLINES | ImageConsumer.SINGLEPASS);
    }

    public synchronized boolean isConsumer(ImageConsumer ic) {
        return ic == consumer;
    }

    public synchronized void notifyConsumer(int x, int y, int w, int h) {
        if(consumer != null) {
            consumer.setPixels(x, y, w, h, model, pixels, 0, width);
            consumer.imageComplete(ImageConsumer.SINGLEFRAMEDONE);
        }
    }

    public synchronized void notifyConsumer() {
        if(consumer != null) {
            consumer.setPixels(0, 0, width, height, model, pixels, 0, width);
            consumer.imageComplete(ImageConsumer.SINGLEFRAMEDONE);
        }
    }

    public synchronized void removeConsumer(ImageConsumer ic) {
        if(ic == consumer)
            consumer = null;
    }

    public void draw(Graphics graphics, int x, int y, int w, int h) {
        notifyConsumer(x, y, w, h);
        Shape old_clip = graphics.getClip();
        graphics.clipRect(x, y, w, h);
        graphics.drawImage(render, 0, 0, this);
        graphics.setClip(old_clip);
    }

    public void draw(Graphics graphics, int x, int y) {
        notifyConsumer();
        graphics.drawImage(render, x, y, this);
    }

    public boolean imageUpdate(Image img, int infoflags, int x, int y, int width, int height) {
        return true;
    }

    public void prepare(Component c, int w, int h) {
        width = w;
        height = h;
        pixels = new int[w * h + 1];
        model = new DirectColorModel(32, 0xff0000, 0xff00, 0xff);
        render = c.createImage(this);

        // I still have noi idea why this is done 3 times...
        notifyConsumer();
        c.prepareImage(render, this);
        notifyConsumer();
        c.prepareImage(render, this);
        notifyConsumer();
        c.prepareImage(render, this);
        // initDrawingArea();
    }

    public void requestTopDownLeftRightResend(ImageConsumer ic) {
    }

    public void startProduction(ImageConsumer ic) {
        addConsumer(ic);
    }
}