How to take a screencap of a SWF and download it to user's desktop with AS3?

Does anyone know how to take a screencap and download it to desktop in AS3? I know there is a great BitmapDataExporter in AS2 by Mario Klingenman but it doesn't work in AS3.

Solution

You can try this:

var bitmapData:BitmapData = new BitmapData(stage.stageWidth,stage.stageHeight,false,0x000000);
bitmapData.draw(workspace);
var byteArray:ByteArray = bitmapData;

var request:URLRequest = new URLRequest ( 'yourserver/save.php' );
var loader: URLLoader = new URLLoader();
request.contentType = 'application/octet-stream';
request.method = URLRequestMethod.POST;
request.data = byteArray;
loader.load( request );

//and save.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>save</title>
</head>

<body>
<?php

$fp = fopen( 'file.txt', 'wb' );
fwrite( $fp, $GLOBALS[ 'HTTP_RAW_POST_DATA' ]  );
fclose( $fp );

echo "result: " + $fp;
 ?>
</body>
</html>

Also, you can use Adobe's corelib which has a JPEG encoder, and there are loads of great tutorials out there.