PNG encoder

import flash.events.Event;
import flash.display.*;
import flash.geom.*;
import flash.utils.*;
import flash.filesystem.*


addEventListener(Event.ENTER_FRAME,eFrame);

var bmd:BitmapData=new BitmapData(stage.stageWidth,stage.stageHeight);
var all:Rectangle=new Rectangle(0,0,stage.stageWidth,stage.stageHeight);
var opts:Object=new PNGEncoderOptions(true);
var basePath:String=File.desktopDirectory.nativePath+File.separator+"dump"+File.separator;

var i:uint=0;

eFrame(null);

function eFrame(e:Event):void {
    bmd.fillRect(all,0x00000000);
    bmd.drawWithQuality(root,null,null,null,null,true,StageQuality.HIGH_16X16);

    var ba:ByteArray=bmd.encode(all,new PNGEncoderOptions(true));

    var f:File=new File(basePath+i+".png");
    var fs:FileStream=new FileStream();
    fs.open(f,FileMode.WRITE);
    fs.writeBytes(ba);
    fs.close();

    ++i;
}