golang 透明底图转白底

	url := ""var s []byte// 请求线上图片s = GetUrl(url)// 处理透明底图转白底img, _, err := image.Decode(bytes.NewReader(s))if err != nil {fmt.Println("读取图片失败")}bounds := img.Bounds()dst := image.NewNRGBA(bounds)draw.Draw(dst, bounds, image.White, image.Point{}, draw.Src)draw.Draw(dst, bounds, img, bounds.Min, draw.Over)ou, _ := os.Create("ss.jpeg")defer ou.Close()png.Encode(ou, dst)// buf := new(bytes.Buffer)err = jpeg.Encode(ou, dst, nil)if err != nil {fmt.Println("生成白底图失败")}