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demo1.html
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demo1.html
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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<style>
body{ background:#000;}
#c1{ background:#fff;}
</style>
<script>
window.onload=function(){
var oC=document.getElementById('c1');
var gd=oC.getContext('2d');
//画方块
gd.fillRect(100,100,100,300);
gd.stroke();
//贴个字
gd.font='Arial';
gd.textAlign='center';
gd.fillStyle='red';
gd.fillText('Hello World',300,200);
gd.strokeText('Hello World',300,200);
gd.stroke();
//画圆
gd.arc(400,400,30,0,Math.PI*2,true);
gd.fillStyle='red';
gd.stroke();
gd.fill();
//设置渐变
var g=gd.createLinearGradient(0,0,0,160);
g.addColorStop(0,'#f00');
g.addColorStop(1,'#ff0');
gd.fillStyle=g;
gd.fillRect(30,30,100,100);
gd.fill();
//设置阴影
gd.shadowOffsetX=10;
gd.shadowOffsetY=10;
gd.shadowBlur=5;
gd.shadowColor='rgba(0,0,0,0.5)';
gd.fillStyle='#ccc';
gd.fillRect(500,350,150,100);
};
</script>
</head>
<body>
<canvas id="c1" width="800" height="600"></canvas>
</body>
</html>