javascript - Canvas : shape + shadow

Question

我需要画一个形状然后添加阴影但是阴影在填充颜色之上我需要它在它下面..我无法很好地解释这种情况所以这里是 jsfiddle 上的一个例子

var canvas = document.getElementById("myCanvas");
var context = canvas.getContext("2d");
context.beginPath();
context.moveTo(170, 80);
context.bezierCurveTo(130, 100, 130, 150, 230, 150);
context.bezierCurveTo(250, 180, 320, 180, 340, 150);
context.bezierCurveTo(420, 150, 420, 120, 390, 100);
context.bezierCurveTo(430, 40, 370, 30, 340, 50);
context.bezierCurveTo(320, 5, 250, 20, 250, 50);
context.bezierCurveTo(200, 5, 150, 20, 170, 80);
context.closePath();
context.lineWidth = 5;     
context.fillStyle = "#8ED6FF";
context.strokeStyle = "#0000ff";     
context.shadowColor = "#000000";
context.shadowBlur    = 2;
context.shadowOffsetX = 5;
context.shadowOffsetY = 5;
context.fill();     
context.stroke();

http://jsfiddle.net/j8u8p/谢谢

Answer 1

http://jsfiddle.net/j8u8p/11/

注意:我所做的只是重新安排上下文调用并添加 globalCompositeOperation

附注这看起来更好:http://jsfiddle.net/j8u8p/13/

p.p.s 这被调整了，因为你提示这个差距:http://jsfiddle.net/j8u8p/16/