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