cairo/canvas.go
func (v *Context) SetFillRule(fillRule FillRule) {
	C.cairo_set_fill_rule(v.native(), C.cairo_fill_rule_t(fillRule))
}
func (v *Context) SetFillRule(fillRule FillRule) {
	C.cairo_set_fill_rule(v.native(), C.cairo_fill_rule_t(fillRule))
}
// SetFillRule is a wrapper around cairo_set_fill_rule().