canvas-4createPattern.html

时间：2015-11-20 19:27:20 收藏：0 阅读：220
<!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 = 800;
            canvas.height = 800;

            if(canvas.getContext(‘2d‘)){
                var context = canvas.getContext(‘2d‘);

                // begin
                var backgroundImage = new Image();
                backgroundImage.src = "img/1.png";
                backgroundImage.onload = function(){
                    var pattern = context.createPattern(backgroundImage,‘repeat‘);
                    context.fillStyle = pattern;
                    context.fillRect(0,0,canvas.width,canvas.height)
                }

            }else{
                alert(‘当前游览器不支持Canvas，请更换游览器后再试！‘);
            }
        }
    </script>
</body>
<script>
    /*总结
        //填充图片
        createPattern(img,repeat-style)

        repeat-style:
            repeat-x
            repeat-y
            repeat
            no-repeat

        //填充canvas
        createPattern(canvas,repeat-style)
        
        //填充video
        createPattern(video,repeat-style)
    */
</script>
</html>
原文：http://www.cnblogs.com/cynthia-wuqian/p/4981644.html