You will notice that the image flickers when drawing 您会注意到图像在绘制时会不断闪烁。
2.
Because only one graphics operation is performed on the screen , the image flickering associated with complex painting operations is eliminated 因为在屏幕上只执行一个图形操作,所以消除了由复杂绘制操作造成的图像闪烁。