upload

private function upload(picture:BitmapData, format:String = JPG):void {
	var urlLoader:URLLoader = new URLLoader();
	
	// encode image to ByteArray
	var byteArray:ByteArray;			
	
	// encode in the requested file format
	switch (format)	{
		case JPG:
			// encode as JPG
			var jpgEncoder:JPGEncoder = new JPGEncoder(98);
			byteArray = jpgEncoder.encode(picture);
			break;
		
		case PNG:
			// encode as PNG
			byteArray = PNGEncoder.encode(picture);
			break;
		
		default:
			trace("error! fell through upload image format switch case");
			break;
	}
	
	// convert binary ByteArray to plain-text, for transmission in POST data
	var encoder:Base64Encoder = new Base64Encoder();
	encoder.encodeBytes(byteArray);
	
	// set upload destination
	var request:URLRequest = new URLRequest('upload url here');
	request.method = URLRequestMethod.POST;
	
	// set data to send
	var variables:URLVariables = new URLVariables();
	variables.format = format;
	variables.image = encoder.toString();
	request.data = variables;
	
	urlLoader.dataFormat = URLLoaderDataFormat.TEXT;
	urlLoader.load(request);
}