sd.restoreSurface();
// if succeeded, first fill the surface with bg color
// note: use the non-synch method to avoid incorrect lock order
Color bg = sd.getPeer().getBackgroundNoSync();
SunGraphics2D sg2d = new SunGraphics2D(sd, bg, bg, null);
sg2d.fillRect(0, 0, sd.getBounds().width, sd.getBounds().height);
sg2d.dispose();
// now clean the dirty status so that we don't flip it
// next time before it gets repainted; it is safe
// to do without the lock because we will issue a
// repaint anyway so we will not lose any rendering