package {

	import flash.display.Bitmap;
	import flash.display.BitmapData;

	[SWF(width=1200, height=600, backgroundColor=0x000000)]

	/**
	* Demonstrates how two images can be combines by using BitmapDta's compare() method.
	*/
	public class graphic_flex_image_effects_04_Flex_CompareTest extends graphic_flex_image_effects_04_Flex_DualImageTest {

		/**
		* Called after two images have been loaded by super class.
		* This creates a third image using compare() with loaded images.
		*/
		override protected function operateOnImages():void {
			var bitmap0:Bitmap = getChildAt(0) as Bitmap;
			var bitmap1:Bitmap = getChildAt(1) as Bitmap;
			var comparedData:Object = bitmap0.bitmapData.compare(bitmap1.bitmapData);
			// compare() can return either bitmap data or a number
			if (comparedData is BitmapData) {
				var bitmap:Bitmap = new Bitmap(comparedData as BitmapData);
				addChild(bitmap);
				// place to the right of loaded images
				bitmap.x = bitmap1.x + bitmap1.width;
			}
		}

	}

}