Ask HN: Language with good SVG libraries?

I've had an idea recently that involves automated programmatic creation of simple geometric vector graphics. Mostly repeated composition of lines, arcs, and circles, with varying endpoint shapes. Learning a new programming language is not an obstacle - it'd be good to have the extra motivation, actually.

Can anyone recommend a language for which there are good libraries for this purpose (and such a library, of course)? A minor plus would be if it also has good libraries for making a web-app, but that's not high-priority since the actual image-generation can be separated from the web-app that delivers results without needing any conceptual changes, as long as I go with a thin client in that case.