//HTMLCanvas 是 Html Canvas 的代理类，封装了 Canvas 的属性和方法。。请不要直接使用 new HTMLCanvas！
//此处将canvas指定区域进行截屏
var htmlC = sp.drawToCanvas(100,100,0,0);
//获取截屏区域的texture
var _texture = htmlC.getTexture();
//将截屏的texture进行draw绘制并显示到舞台
var sp2 = new Laya.Sprite();
sp2.x = 300;
sp2.graphics.drawTexture(_texture,0,0,100,100);
Laya.stage.addChild(sp2);
