golang标准库——image

package main

import (
	"fmt"
	"image"
	"image/draw"
	_ "image/jpeg"
	"image/png"
	"os"
)

func main() {
	file,err := os.Open("./public/1.jpg")
	if err != nil{
		fmt.Println(err)
	}

	img,_,imgErr := image.Decode(file)
	if imgErr != nil{
		fmt.Println(imgErr)
	}

	file2,err2 := os.Open("./public/bg.jpg")
	if err2 != nil{
		fmt.Println(err2)
	}

	img2,_,imgErr2 := image.Decode(file2)
	if imgErr2 != nil{
		fmt.Println(imgErr2)
	}

	baseSrcBounds := img2.Bounds().Max
	newWidth := baseSrcBounds.X
	newHeight := baseSrcBounds.Y

	des := image.NewRGBA(image.Rect(0, 0, newWidth, newHeight)) // 底板
	//首先将一个图片信息存入jpg
	draw.Draw(des, des.Bounds(), img2, img2.Bounds().Min, draw.Src)


	draw.Draw(des, des.Bounds(), img, img.Bounds().Min, draw.Src)

	w,_ := os.Create("./public/b.jpg")
	png.Encode(w,des)

}