Convert d3.js svg to canvas

I am trying to convert a d3.js visualization to canvas. The d3.js code can be found here: https://gist.github.com/3166265

Can someone explain the basics of converting this visualization to canvas? I can’t use a program like canvg because the browser I am targeting (Android 2.3 platform) cannot parse SVG AT ALL. So I need to convert this visualizatoin to Canvas. Any help you can provide will be greatly appreciated ...