_screen = new ScreenDescription();
_canvas = new RdpBufferedImageCanvas(this, canvasWidth, canvasHeight);
onFramebufferSizeChange(canvasWidth, canvasHeight);
_screen.addSizeChangeListener(new SizeChangeListener() {
@Override
public void sizeChanged(int width, int height) {
if (_canvas != null) {
_canvas.setCanvasSize(width, height);
}