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<body>
<p><canvas id="canvas" style="border:2px solid black;" width="200" height="200"></canvas>
<script>
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
var data = "<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'>" +
"<foreignObject width='100%' height='100%'>" +
"<div xmlns='http://www.w3.org/1999/xhtml' style='font-size:40px;color:red'>" +
"<em>I</em> like <span style='color:white; text-shadow:0 0 2px blue;'>网络的上面</span>" +
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"</foreignObject>" +
"</svg>";
var svg = new (self.BlobBuilder || self.MozBlobBuilder || self.WebKitBlobBuilder);
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svg.append(data);
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img.onload = function() {
ctx.drawImage(img, 0, 0);
DOMURL.revokeObjectURL(url);
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img.src = url;
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</body>
</html>
