<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
var canvas = $("#myCanvas");
var context = canvas.get(0).getContext("2d");
// A basic drop shadow
context.shadowBlur = 20;
context.shadowColor = "rgb(0, 0, 0)";
context.fillRect(50, 50, 100, 100);
// Moving the shadow and changing the colour
context.shadowBlur = 0;
context.shadowOffsetX = 10;
context.shadowOffsetY = 10;
context.shadowColor = "rgba(100, 100, 100, 0.5)"; // Transparent grey
context.fillRect(200, 50, 100, 100);
// Shadows on other shapes
context.shadowColor = "rgb(255, 0, 0)"; // Red
context.shadowBlur = 50;
context.shadowOffsetX = 0;
context.shadowOffsetY = 0;
context.beginPath();
context.arc(400, 100, 50, 0, Math.PI*2, false);
context.closePath();
context.fill();
});
</script>
</head>
<body>
<canvas id="myCanvas" width="500" height="500">
</canvas>
</body>
</html>
【drawing_settings】
