一个放射状渐变
<!DOCTYPE html>
<html>
<head>
<title>HTML5 Canvas Demo</title>
<!--[if IE]>
<script type="text/javascript" src="excanvas.js"></script>
<![endif]-->
<script>
window.onload=function() {
var mycanvas=document.getElementById("myCanvasTag");
var mycontext=mycanvas.getContext('2d');
var mygradient=mycontext.createRadialGradient(300,300,0,300,300,300);
mygradient.addColorStop("0","magenta");
mygradient.addColorStop(".25","blue");
mygradient.addColorStop(".50","green");
mygradient.addColorStop(".75","yellow");
mygradient.addColorStop("1.0","red");
mycontext.fillStyle=mygradient;
mycontext.fillRect(0,0,400,400);
}
</script>
</head>
<body>
<div style="margin-left:30px;">
<canvas id="myCanvasTag" width="400" height="400" style="border: 10px blue solid">
</canvas>
<br /><br />
<a href="index.html">back</a>
</div>
</body>
</html>
开心洋葱 , 版权所有丨如未注明 , 均为原创丨未经授权请勿修改 , 转载请注明一个放射状渐变！
