源代码：http://cid-98176e5239e26c68.office.live.com/browse.aspx/%5ENSelf-host/2010-12-05%20MSDNBlog%5E_linanw%5E_DeepZoom%20on%20Windows%20Phone%207?uc=1
参开文献： http://blogs.msdn.com/b/priozersk/archive/2010/03/28/deep-zoom-on-wp7.aspx http://msdn.microsoft.com/en-us/library/dd901589(v=VS.95).aspx