The Metafont system is very different from the Postscript or Truetype systems that store the entire font outlines in quadratic and cubic splines, respectively. Metafont font outlines are, I believe, not even splines themselves anymore (I could be mistaken), but in any case those outlines are not calculated as such to render a Metafont font. Metafont produces bitmaps from basic font shapes and a multitude of font parameters.
That is why, in contrast to Metafont text, the Postscript and Truetype systems make it easier to be "rendered to spline outlines": For example, WPF allows to typeset a paragraph of text given a supported font not only into a bitmap, but also into the outlines as quadratic splines.
To have text "rendered into splines" is helpful when you want to do something further fancy with it, such as building 3D extrusion models from it. I would even argue that with SVG, XAML and a plethora of other spline-based vector graphics systems the spline representation of text has become a pretty standard interchange format besides simple bitmaps.
So my question: Does anyone know if it's possible to get TeX to render into splines in such a fashion? Or, put differently, to get an SVG/XAML/AI/Inkscape representation from the text?
I understand that it might be necessary for Metafont font outlines to be represented by splines as an approximation, but that would be absolutely fine.
Can anyone contribute something clever to this? Has some bored soul done some magic that makes this possible?