pango-gravity-to-rotation (gravity)

script -- a pango-script value to query

A double with the rotation value corresponding to gravity.

Converts a pangogravity value to its natural rotation in radians. gravity should not be :auto.

Note that the function pango-matrix-rotate takes angle in degrees, not radians. So, to call the function pango-matrix-rotate with the output of this function you should multiply it by (180 / pi).