【非等比例图片】处理方法，将各种尺寸图片处理成统一尺寸

 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>上传各种尺寸的头像，处理成正圆形</title>
<style>
body{ background:#CCC}
img{ width:30%; display:block;}
</style>

</head>


<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAC0lEQVQIW2NkAAIAAAoAAggA9GkAAAAASUVORK5CYII=" style="background-image:url(http://www.baidu.com/img/bd_logo1.png); border:2px solid #FFF; border-radius:100%; background-size:cover; background-position:center" />

<br />


<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAC0lEQVQIW2NkAAIAAAoAAggA9GkAAAAASUVORK5CYII=" style="background-image:url(http://www.baidu.com/img/bd_logo1.png); border:2px solid #FFF;  background-size:cover; background-position:center" />

<br />
<br />
<img src="http://www.baidu.com/img/bd_logo1.png" style=" border-radius:100%; " />

<body>
</body>
</html>

 

设置比例的方法：

Firefox浏览器—控制台---运行如下代码：

var canvas=document.createElement('canvas')

canvas.width=2

canvas.height=1

canvas.toDataURL('image/png')

posted @ 2015-11-27 17:14  Shimily  阅读(380)  评论(0)    收藏  举报