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SVG转canvas再转png图片这个无聊的需求是因为客户要用邮件客户端看各种图表，只好搞了搞。
对插件canvg.js做出了小的改动，把canvg(）函数第二个参数由文件路径修改为直接传递svg代码，同时避免了警告
Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user‘s experience. For more help, check
代码如下：
<html>
<head>
<meta charset="UTF-8">
<title>Svg to Png</title>
<script src="mycanvg.js"></script>
<script src="rgbcolor.js"></script>
<script src="jquery.js"></script>
</head>
<body>
<div id="svgContainer">
<svg xmlns="http://www.w3.org/2000/svg" version="1.1" height=‘100px‘ width=‘600px‘>
<circle cx="100" cy="50" r="40" stroke="black"stroke-width="2" fill="red" />
</svg>
</div>
<canvas id="myCanvas" height="100" width="600" >Your browser does not support the HTML5 canvas tag.</canvas>
<div style="background-color:blue;height:50px;margin:10 10 10 0">
</div>
<img src=‘‘ id=‘myImg‘ />
<script type="text/javascript">
// var c = document.getElementById(‘myCanvas‘);
// var ctx = c.getContext(‘2d‘);
// ctx.fillStyle = ‘#FF0000‘;
// ctx.fillRect(0, 0, 80, 100);
var str = $(‘#svgContainer‘)[0].innerHTML;
console.log(str);
canvasId = document.getElementById(‘myCanvas‘);
canvg(canvasId,str);
function convertCanvasToImage(canvas) {
var image = new Image();
image.src = canvas.toDataURL("image/png");
return image;
}
document.getElementById(‘myImg‘).src = convertCanvasToImage(myCanvas).src;
</script>
</body>
</html>
修改后的canvg.js代码太多了，贴不完，先不贴了
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原文地址：http://my.oschina.net/u/861926/blog/401251
