cairo/canvas.go
func (v *Context) GetTolerance() float64 {
	c := C.cairo_get_tolerance(v.native())
	return float64(c)
}
func (v *Context) GetTolerance() float64 {
	c := C.cairo_get_tolerance(v.native())
	return float64(c)
}
// GetTolerance is a wrapper around cairo_get_tolerance().