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canvas-8clip.html

时间:2015-11-23 16:46:34      阅读:358      评论:0      收藏:0      [点我收藏+]
<!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>

 

canvas-8clip.html

原文:http://www.cnblogs.com/cynthia-wuqian/p/4988529.html

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