Rotates a pixbuf by a multiple of 90 degrees, and returns the result in a new pixbuf. Since 2.6
the angle to rotate by
the new GdkPixbuf, or NULL if not enough memory could be allocated for it. [transfer full]
See Implementation
Rotates a pixbuf by a multiple of 90 degrees, and returns the result in a new pixbuf. Since 2.6