protected final Graphics getOnscreenGraphics(Color fg, Color bg, Font f) {
if (getSurfaceData() == null) {
return null;
}
if (fg == null) {
fg = SystemColor.windowText;
}
if (bg == null) {
bg = SystemColor.window;
}
if (f == null) {
f = DEFAULT_FONT;
}
return platformWindow.transformGraphics(new SunGraphics2D(getSurfaceData(), fg, bg, f));
}
