sclass JVolatileImageSurface > Surface {
  VolatileImageMakerForComponent volatileImageMaker;
  settable bool volatileMode = true;
  settable Renderable renderable;
  
  *() {}
  *(Renderable *renderable) {}
  
  { clearSurface = false; }
  
  @Override
  public void render(int w, int h, Graphics2D g) {
    if (renderable == null)
      ret with fillRect(g, 0, 0, w, h, Color.white);
      
    if (!volatileMode)
      renderable.renderOn(g, w, h);
    else {
      if (volatileImageMaker == null || !volatileImageMaker.sizeIs(w, h))
        volatileImageMaker = new VolatileImageMakerForComponent(this, w, h, renderable);
          
      volatileImageMaker.paintOnScreen(g);
    }
  }
}

Began life as a copy of #1033788