Spherize

[Bug Importer]

I´ve seen in some other applications that there is an
effect to project an image into a spheric platform,
known as spherize. This effect makes the image or
shape or path to look like it woulb be placed on the
surface of a sphere.

I think this is a calculus to do on the outter pixels
of the path, but i've not found these formulas.

This effect coulb be done with python, and i want to,
but do not have the formulas.