I needed some way to draw diagrams and sometimes output them in a vector format and sometimes output them in a raster format. The interface to VECTO is very similar to that of CL-PDF . So, I have started a library that makes it easy to swap out whether you are rendering to PDF or PNG.
You can find it here: https://github.com/nklein/draw
Its functionality is somewhat limited, but it is enough that I can generate the diagrams I need at the moment. I will be adding more functionality to this library as time goes on.
Apparently, my website has gone stale though and I can no longer figure out how to add to this page all of the things that are about this library. So, you’ll have to look for them yourself using the draw tag.