go get -u github.com/shiningrush/avatarbuilder

  // init avatarbuilder, you need to tell builder ttf file and how to alignment text
	ab := avatarbuilder.NewAvatarBuilder("./SourceHanSansSC-Medium.ttf", &calc.SourceHansSansSCMedium{})
	ab.SetBackgroundColorHex(colors[1])
	ab.SetFrontgroundColor(color.White)
	ab.SetFontSize(80)
	ab.SetAvatarSize(200, 200)
	if err := ab.GenerateImageAndSave("12", "./out.png"); err != nil {
		fmt.Println(err)
		return
	}