[udaaff]

var rect:Shape = new Shape();
rect.graphics.beginFill(0x00FFCC);
rect.graphics.drawRect(0, 0, 100, 100);
 
var circle:Shape = new Shape();
circle.graphics.beginFill(0x000000, 1);
circle.graphics.drawCircle(50, 50, 50);
 
var rectBitmapData:BitmapData = new BitmapData(100, 100);
 
// рисуем
rectBitmapData.draw(rect);
// стираем
rectBitmapData.draw(circle, null, null, BlendMode.ERASE);
 
var bitmap:Bitmap = new Bitmap(rectBitmapData);
addChild(bitmap);