ordonnance/common/util/ordonnance.go

package util

import (
	"bytes"
	"fmt"
	"image"
	"image/color"
	"image/draw"
	"image/jpeg"
	"image/png"
	"io/ioutil"
	"ordonnance/server/model"
	"os"
	"time"

	"github.com/golang/freetype"
	"github.com/golang/freetype/truetype"
	qrcode "github.com/skip2/go-qrcode"
)

func MakeImg(ordonnance model.Ordonnance) string {
	m := image.NewRGBA(image.Rect(0, 0, 200, 200))
	white := color.RGBA{255, 255, 255, 0}
	draw.Draw(m, m.Bounds(), &image.Uniform{white}, image.ZP, draw.Src)
	var font *truetype.Font
	fontBytes, _ := ioutil.ReadFile("./line.ttf")
	font, _ = freetype.ParseFont(fontBytes)
	f := freetype.NewContext()
	f.SetFont(font)
	f.SetClip(m.Bounds())
	f.SetDst(m)
	f.SetSrc(image.NewUniform(color.RGBA{0, 0, 0, 255}))
	f.SetFontSize(18)
	url := fmt.Sprintf("https://sm.hqedust.com/ordonnance/#/ordonnance/%d", ordonnance.OrdonnanceId)
	qrcodeData, _ := qrcode.Encode(url, qrcode.Medium, 100)
	qrImg, _ := png.Decode(bytes.NewReader(qrcodeData))
	offset := image.Pt(10, 10)
	draw.Draw(m, qrImg.Bounds().Add(offset), qrImg, image.ZP, draw.Over)

	f.SetFontSize(12)
	w, h := 120, 30
	f.DrawString("同春煎药", freetype.Pt(w, h))

	w, h = 120, 50
	f.DrawString("冷藏保管", freetype.Pt(w, h))

	w, h = 120, 80
	f.DrawString("时间:", freetype.Pt(w, h))

	w, h = 120, 100
	f.DrawString(ordonnance.PrintDate, freetype.Pt(w, h))

	w, h = 20, 130
	f.DrawString("To:", freetype.Pt(w, h))

	w, h = 20, 150
	f.DrawString("姓名:  "+ordonnance.Nickname, freetype.Pt(w, h))

	w, h = 120, 150
	f.DrawString(fmt.Sprintf("数量:  %d 贴", ordonnance.Counter), freetype.Pt(w, h))

	w, h = 20, 170
	f.DrawString("地址:  "+ordonnance.Organ, freetype.Pt(w, h))

	filename := time.Now().Format("tempdir/20060102150405.jpg")
	myfile, _ := os.Create(filename)
	jpeg.Encode(myfile, m, &jpeg.Options{Quality: 100})
	return filename
}