Tour of Go 2.0

Exercise: Images

Remember the picture generator from before? Time to revisit it — but this time, return an image.Image instead of a raw slice.

Define your own Image type and implement the three methods the image.Image interface requires:

  • Bounds should return image.Rect(0, 0, w, h)
  • ColorModel should return color.RGBAModel
  • At should return a color — use color.RGBA{v, v, 255, 255} where v is whatever pixel formula you like

Then call pic.ShowImage with your type and see the result.

main.go ▶ Run in Playground 
package main

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

type Image struct{}

func main() {
	m := Image{}
	pic.ShowImage(m)
}