canvas-8clip.html 

<!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>

 

posted @ 2015-11-23 15:09  Cynthia娆墨旧染  阅读(293)  评论(0)    收藏  举报