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http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/display/BitmapData.html
http://help.adobe.com/en_US/as3/dev/WS5b3ccc516d4fbf351e63e3d118a9b90204-7d61.html#WS5b3ccc516d4fbf351e63e3d118a9b90204-7d53
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原文地址:http://www.cnblogs.com/lilei9110/p/4683658.html