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Re:Peity - Little charts for little projects by CognitiveLens on Thursday June 21, 2012 @04:22PM (#4144013)
This looks great, and because it's based on <canvas> rendering, everything looks perfectly sharp on retina displays...
Re:Peity - Little charts for little projects by benpickles on Thursday June 21, 2012 @05:44PM (#4144357)
Actually it took a little work to get things crisp on retina displays - https://github.com/benpickles/peity/blob/master/jquery.peity...

I think I got the technique from here - http://joubert.posterous.com/crisp-html-5-canvas-text-on-mob...