fix

utils/qrcode/creator.go

@@ -0,0 +1,86 @@
+package qrcode
+
+import (
+	"bytes"
+	"encoding/base64"
+	"github.com/nfnt/resize"
+	"github.com/skip2/go-qrcode"
+	"golang.org/x/image/draw"
+	"image"
+	_ "image/jpeg"
+	"image/png"
+	"os"
+)
+
+// 带logo的二维码图片生成 content-二维码内容    size-像素单位   logoPath-logo文件路径 x：x轴整体偏移 y:y轴整体偏移
+func CreateQrCodeBs64WithLogo(content, outPath string, logoPath string, size, x, y int, disableBorder bool) (data string, err error) {
+	code, err := qrcode.New(content, qrcode.High)
+	if err != nil {
+		return
+	}
+	if disableBorder {
+		code.DisableBorder = true
+	}
+	//设置文件大小并创建画板
+	qrcodeImg := code.Image(size)
+	outImg := image.NewRGBA(qrcodeImg.Bounds())
+	buf := new(bytes.Buffer)
+	//无logo
+	if logoPath == "" {
+		//图像偏移
+		draw.Draw(outImg, outImg.Bounds().Add(image.Pt(x, y)), outImg, outImg.Bounds().Min, draw.Src)
+		_ = png.Encode(buf, qrcodeImg)
+		if outPath != "" {
+			// 写入文件
+			f, _ := os.Create(outPath)
+			defer f.Close()
+			err = png.Encode(f, qrcodeImg)
+			if err != nil {
+				return "", err
+			}
+		}
+		return base64.StdEncoding.EncodeToString(buf.Bytes()), nil
+	}
+	//读取logo文件
+	logoFile, err := os.Open(logoPath)
+	if err != nil {
+		return "", err
+	}
+	logoImg, _, err := image.Decode(logoFile)
+	if err != nil {
+		return "", err
+	}
+	logoImg = resize.Resize(uint(size/5), uint(size/5), logoImg, resize.Lanczos3)
+	// 添加边框
+	// 图片到边框距离
+	pic2FramePadding := logoImg.Bounds().Dx() / 10
+
+	// 新建一个边框图层
+	transparentImg := image.NewRGBA(image.Rect(0, 0, logoImg.Bounds().Dx()+pic2FramePadding, logoImg.Bounds().Dy()+pic2FramePadding))
+	// 图层颜色设为白色
+	draw.Draw(transparentImg, transparentImg.Bounds(), image.White, image.Point{}, draw.Over)
+	// 将缩略图放到透明图层上
+	draw.Draw(transparentImg,
+		image.Rect(pic2FramePadding/2, pic2FramePadding/2, transparentImg.Bounds().Dx(), transparentImg.Bounds().Dy()),
+		logoImg,
+		image.Point{},
+		draw.Over)
+
+	//logo和二维码拼接
+	draw.Draw(outImg, outImg.Bounds(), qrcodeImg, image.Pt(0, 0), draw.Over)
+	offset := image.Pt((outImg.Bounds().Max.X-transparentImg.Bounds().Max.X)/2, (outImg.Bounds().Max.Y-transparentImg.Bounds().Max.Y)/2)
+	draw.Draw(outImg, outImg.Bounds().Add(offset), transparentImg, image.Pt(0, 0), draw.Over)
+	//图像偏移
+	draw.Draw(outImg, outImg.Bounds().Add(image.Pt(x, y)), outImg, outImg.Bounds().Min, draw.Src)
+	err = png.Encode(buf, outImg)
+	if err != nil {
+		return "", err
+	}
+	if outPath != "" {
+		// 写入文件
+		f, _ := os.Create(outPath)
+		defer f.Close()
+		_ = png.Encode(f, outImg)
+	}
+	return base64.StdEncoding.EncodeToString(buf.Bytes()), nil
+}