Investigate nVidia path rendering

[kkaefer]

Many nVidia chips have an OpenGL extension called NV_draw_path. It is documented at in this pdf and allows rendering bezier paths.

Drawback is:

"Stencil functionality is not applied when rendering paths. Path rendering
will generate an error if stencil testing is enabled."

That'd make it hard to clip, but we can draw in a texture and then draw the clipped texture.