<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<canvas id="canvas" style="margin:0 auto;border:1px #ddd solid">
The current browser does not support Canvas, can replace the browser a try!
</canvas>
<script>
window.onload = function(){
var canvas = document.getElementById('canvas');
canvas.width = 1024;
canvas.height = 768;
if(canvas.getContext('2d')){
var context = canvas.getContext('2d');
context.save();
context.fillStyle = "red";
context.translate(100,100);
context.fillRect(0,0,400,400);
context.restore();
context.save();
context.fillStyle = "green";
context.translate(300,300);
context.fillRect(0,0,400,400);
context.restore();
}else{
alert('当前游览器不支持Canvas，请更换游览器后再试！');
}
}
</script>
</body>
<script>
/*图形变换
位移 translate(x,y)
旋转 rotate(deg)
缩放 scale(sx,sy)
*/
</script>
</html>
