package control9 import (	"image"	"strconv") func ctlatoi(str string) int {	n, err := strconv.Atoi(str)	if err != nil {		return 0	}	return n} func ctlalignpt(r image.Rectangle, dx, dy, align int) image.Point {	pt := image.ZP 	switch align % 3 {	case 0: /* left */		pt.X = r.Min.X	case 1: /*center */		pt.X = r.Min.X + (r.Dx()-dx)/2	case 2: /*right*/		pt.X = r.Max.X - dx	} 	switch (align / 3) % 3 {	case 0: /* top */		pt.Y = r.Min.Y	case 1: /* center */		pt.Y = r.Min.Y + (r.Dy()-dy)/2	case 2: /* bottom */		pt.Y = r.Max.Y - dy	} 	return pt}