a simple line drawing anti

代码说明：

一个简易的反走样线段绘制程序，给出了一个通用的wu象素解决方案。程序启动后，在窗口上任一点点击一下，然后分别用钩选反走样和不钩选可以绘制直线，可以看见反走样的效果。-a simple line drawing anti-aliasing procedures, is a common wu pixel solution. After commencement, 1:00 office window click, and then using anti-aliasing Senators and Congressmen can draw straight lines, we can see the effect of anti-aliasing.