http://java.freehep.org/vectorgraphics/index.html
this free library includes all those formats, and would be a great
implementation for p5.
Animations exported out to swf would be especially interesting.

-seltar

the vg lib exports static swf files, afaik.. exporting full animations
would be an enormous task (or make enormous files because they'd
essentially be movies).

but having SVG, static SWF files, and PS files would be nice. this would
actually be less than a page or two of code for anyone interested to write it.

closing this since we've added PDF in the meantime, and it's really
something that should be handled by an external library. the freehep
project hasn't been updated since 2007 as well, so it's unlikely that we'd
want to pull it in as a library.