asclass JVolatileImageSurface > JComponent {
  VolatileImageMakerForComponent volatileImageMaker;
  
  abstract void renderVolatile(int w, int h, Graphics2D g);
  
  @Override
  public void render(int w, int h, Graphics2D g) {
    if (volatileImageMaker == null || !volatileImageMaker.sizeIs(w, h))
      volatileImageMaker = new VolatileImageMakerForComponent(this, w, h,
        (_g, _w, _h) -> renderVolatile(_w, _h, _g));
        
    volatileImageMaker.paintOnScreen(g)
  }
}