var bitmapDataOriginal:BitmapData = new BitmapData(128, 128, false, 0xFF00FF);

bitmapDataOriginal.fillRect(new Rectangle(0, 0, 50, 50), 0xFF0000);

addChild(new Bitmap(bitmapDataOriginal));

 

var matrix:Matrix = new Matrix();

matrix.rotate(Math.PI);

matrix.translate(bitmapDataOriginal.width, bitmapDataOriginal.height);

var bitmapData:BitmapData = new BitmapData(128, 128, false, 0xFF00FF);

bitmapData.draw(bitmapDataOriginal, matrix);

addChild(new Bitmap(bitmapData)).x = 150;

b.rotationZ = 90;