golang初学之接口---image

来自golang tour 练习 https://tour.go-zh.org/methods/16

package main

import "golang.org/x/tour/pic"
import "image"
import "image/color"

type Image struct{}
func (im Image) ColorModel() color.Model {
    return color.RGBAModel
}
func (im Image) Bounds() image.Rectangle {
    return image.Rect(0, 0, 200, 200)
}
func (im Image) At(x, y int) color.Color {
    return color.RGBA{uint8((x^y)/2), uint8((x+y)/2), 255, 255}
}
func main() {
	m := Image{}
	pic.ShowImage(m)
}