public void drawOnBitmap(DrawListener drawRoutine_) {
if (drawRoutine_ != null && _Source != null) {
RelativeViewAbstract nullView = new RelativeViewAbstract("nullView");
nullView.setWH(_BitmapRect.width(), _BitmapRect.height());
Canvas cBitmap = new Canvas(_Source);
RelativeCanvas rCanvas = new RelativeCanvas(cBitmap, new Rect(0, 0, width(), height()));
drawRoutine_.onCustomDraw(rCanvas, nullView);
cBitmap = null;
rCanvas.destroy();
rCanvas = null;
nullView.destroy();
nullView = null;
}
}