package main import (     "fmt"     "os"     "image"     "image/color"     "image/draw"     "image/jpeg" ) func main() {     f1, err := os.Open("1.jpg")     if err != nil {         panic(err)     }     defer f1.Close()     f2, err := os.Open("2.jpg")     if err != nil {         panic(err)     }     defer f2.Close()     f3, err := os.Create("3.jpg")     if err != nil {         panic(err)     }     defer f3.Close()     m1, err := jpeg.Decode(f1)     if err != nil {         panic(err)     }     bounds := m1.Bounds()     m2, err := jpeg.Decode(f2)     if err != nil {         panic(err)     }     m := image.NewRGBA(bounds)     white := color.RGBA{255, 255, 255, 255}     draw.Draw(m, bounds, &image.Uniform{white}, image.ZP, draw.Src)     draw.Draw(m, bounds, m1, image.ZP, draw.Src)     draw.Draw(m, image.Rect(100, 200, 300, 600), m2, image.Pt(250, 60), draw.Src)     err = jpeg.Encode(f3, m, &jpeg.Options{90})     if err != nil {         panic(err)     }     fmt.Printf("ok\n") }