bitmapの勉強

/**
 * Copyright knowt ( http://wonderfl.net/user/knowt )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/rUVo
 */

package {
    import flash.geom.Matrix;
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        public function FlashTest() {
            // write as3 code here..           
            var sprite:Sprite = new Sprite();
            sprite.graphics.beginFill(0xff0000);
            sprite.graphics.drawCircle(0, 0, 20);
            
            var bitmapData:BitmapData = new BitmapData(200,200,true,0x88000000);
            var bitmap:Bitmap = new Bitmap();
            addChild(bitmap);
            
            var matrix:Matrix = new Matrix();
            matrix.translate(50,50);
            bitmapData.draw(sprite,matrix);
            bitmap.bitmapData = bitmapData;
        }
    }
}