仿 PS中的颜色填充工具

//准备一个40*40绿色背景的BitmapData
var myBitmapData: BitmapData = new BitmapData(40,
	40,
	false,
	0x0000FF00);

//画二个有“交叉重叠”部分的“蓝色”矩形
var rect: Rectangle = new Rectangle(0,
	0,
	25,
	25);
myBitmapData.fillRect(rect,
	0x000000FF);
rect = new Rectangle(20,
	20,
	20,
	20);
myBitmapData.fillRect(rect,
	0x000000FF);

//从坐标(10,10)开始寻找与(10,10)坐标(像素点相同且连续的区域)填充红色
myBitmapData.floodFill(10,
	10,
	0x00FF0000);

var bm: Bitmap = new Bitmap(myBitmapData);
addChild(bm);

bm.scaleX = bm.scaleY = 3.0;
bm.x = stage.stageWidth / 2 -
	bm.width / 2;
bm.y = stage.stageHeight / 2 -
	bm.height / 2;