You might also want to look at SVG, there are two modules that you should look at, the first SVG-2.27 and XML-LibRSVG for conversion. I am thinking about doing something similar, but I want native SVG viewable in the browser and nothing is there yet. The SVG CPAN module looks pretty nice, and the nice thing about SVG is that it scales very well so you can give the option of multiple resolutions very easily. Hope this helps.