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canvas-8clip.html

2015-11-23 15:09 507 查看

<!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.beginPath();
context.fillStyle = "#000";
context.fillRect(0,0,canvas.width,canvas.height);

context.beginPath();
context.arc(500,400,150,0,Math.PI*2)
context.fillStyle = "#fff";
context.fill();
context.clip();

context.fillStyle = "#058";
context.font = "bold 120px Arial";
context.textAlign = "center";
context.textBaseline = "middle";

context.fillText("Canvas",canvas.width/2,canvas.height/2)

}else{
alert('当前游览器不支持Canvas，请更换游览器后再试！');
}
}

</script>
</body>
<script>
/*clip 剪辑区域

context,clip
*/
</script>
</html>

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