canvas-8clip.html

最新推荐文章于 2024-08-10 11:53:46 发布

weixin_34370347

最新推荐文章于 2024-08-10 11:53:46 发布

阅读量67

点赞数

CC 4.0 BY-SA版权

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

本文演示了如何在HTML中使用Canvas元素绘制圆形并显示文本信息，提供了基础的Canvas使用教程。

<!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>