Phone saves only the top left corner of the image - ActionScript3 - iphone

Question

I am trying to save an image to my phone's camera Roll using Action Script 3. The image saves fine on tablet devices. However, when I save the image to my phone, it saves only the top-left corner of the image.
Here is my code,
var media:DisplayItem;
public function SaveAsBitmap():void
{
var cameraRoll:CameraRoll = new CameraRoll();
cameraRoll.addBitmapData(this.GetAsBitmapData());
}
public function GetAsBitmapData():BitmapData
{
var bmpData:BitmapData = new BitmapData(this.width,this.height, false, 0x000000);
this.media.DrawToBitmap(bmpData);
return bmpData;
}
How do I save an image which is larger than the display area of my phone?
Any help appreciated.

Answer 1

In this line:
var bmpData:BitmapData = new BitmapData(this.width,this.height, false, 0x000000);
Check the value of these variables: 'this.width' and 'this.height', probably it's not the right dimensions as you want.
To check the user screen resolution, you can try:
// remember to import
import flash.system.Capabilities;
trace('Capabilities.screenResolutionX: ', Capabilities.screenResolutionX);
trace('Capabilities.screenResolutionY: ', Capabilities.screenResolutionY);
I also saw something on your code, I cannot see all scope, but try to do something:
public function GetAsBitmapData():BitmapData
{
// you can replace this.width and this.height to Capabilities.screenResolutionX/Capabilities.screenResolutionY
var bmpData:BitmapData = new BitmapData(this.width,this.height, false, 0x000000);
bmpData.draw(this.media); // be sure that this.media is IBitmapDrawable
return bmpData;
}

Answer 2

As the other poster stated, the problem is in the following line:
var bmpData:BitmapData = new BitmapData(this.width,this.height, false, 0x000000);
this.width and this.height are returning to you the 'size' of the device screen. What you need to put in in place of those items are the actual width and height of the image you want to load from the camera roll.