最临近插值、双线性内插值、三次卷积法、StretchBlt法实现图像平滑放大-Most near the interpolation, bilinear with interpolation, cubic convolution method, StretchBlt Larger Image Smoothing Method

可以轻松实现位图的拉升缩放等操作，可以轻松实现位图的拉升缩放等操作-Can easily achieve the try for bitmap scaling operations, can easily achieve the try for bitmap scaling operations