Flex - 客户端导出图片
Flash player版本10以上就可以在客户端生成图片并导出。
下面的例子是把一个组件或容器生成图片并导出(注:1,导出容器的话图片上也会包含容器内部组件。2,图片背景是透明的)
package { import flash.display.BitmapData; import flash.display.DisplayObject; import flash.display.DisplayObjectContainer; import flash.geom.Matrix; import flash.geom.Point; import flash.net.FileReference; import flash.utils.ByteArray; import mx.controls.Alert; import mx.graphics.codec.PNGEncoder; public class PictureExporter { public function PictureExporter() { } /** * 导出图片 */ public static function exportChart(d:DisplayObject, fileName:String = 'chart.png'):void{ var dt:DisplayObject = d; var bd:BitmapData = getBitMapData(dt,dt.parent); var fr:Object = new FileReference(); if(fr.hasOwnProperty("save")){ var encoder:PNGEncoder = new PNGEncoder(); var data:ByteArray = encoder.encode(bd); fr.save(data,fileName); }else{ Alert.show("当前的flash player版本不支持此功能,请安装10.0.0以上版本!","提示"); } } //获得对象的BitMapData private static function getBitMapData(mc:DisplayObject,container:DisplayObjectContainer):BitmapData{ var bmpData:BitmapData = new BitmapData(mc.width,mc.height,true,0xffffff); var bounds:Object = mc.getBounds(mc); var bounds2:Object = container.getBounds(container); var matrix:Matrix = mc.transform.matrix.clone(); var point0:Point = container.globalToLocal(mc.localToGlobal(new Point(bounds.x,bounds.y))); var point1:Point = container.globalToLocal(mc.localToGlobal(new Point(bounds.x,bounds.y+bounds.height))); var point2:Point = container.globalToLocal(mc.localToGlobal(new Point(bounds.x+bounds.width,bounds.y))); var point3:Point = container.globalToLocal(mc.localToGlobal(new Point(bounds.x+bounds.width,bounds.y+bounds.height))); var point:Point = point0; (point.x>point1.x)&&(point.x=point1.x); (point.x>point2.x)&&(point.x=point2.x); (point.x>point3.x)&&(point.x=point3.x); (point.y>point1.y)&&(point.y=point1.y); (point.y>point2.y)&&(point.y=point2.y); (point.y>point3.y)&&(point.y=point3.y); matrix.tx = mc.x - point.x; matrix.ty = mc.y - point.y; bmpData.draw(mc,matrix); return bmpData; } } }