dieterpl / gozxing

Port of ZXing (https://github.com/zxing/zxing) core to pure Go.

gozxing A Barcode Scanning/Encoding Library for Go

ZXing is an open-source, multi-format 1D/2D barcode image processing library for Java. This project is a port of ZXing core library to pure Go.

Porting Status (supported formats)

2D barcodes

Format	Scanning	Encoding
QR Code	✔️	✔️
Data Matrix	✔️	✔️
Aztec	✔️
PDF 417
MaxiCode

1D product barcodes

Format	Scanning	Encoding
UPC-A	✔️	✔️
UPC-E	✔️	✔️
EAN-8	✔️	✔️
EAN-13	✔️	✔️

1D industrial barcode

Format	Scanning	Encoding
Code 39	✔️	✔️
Code 93	✔️	✔️
Code 128	✔️	✔️
Codabar	✔️	✔️
ITF	✔️	✔️
RSS-14	✔️	-
RSS-Expanded

Special reader/writer

Reader/Writer	Porting status
MultiFormatReader
MultiFormatWriter
ByQuadrantReader
GenericMultipleBarcodeReader
QRCodeMultiReader	✔️
MultiFormatUPCEANReader	✔️
MultiFormatOneDReader

Usage Examples

Scanning QR code

package main

import (
	"fmt"
	"image"
	_ "image/jpeg"
	"os"

	"github.com/dieterpl/gozxing"
	"github.com/dieterpl/gozxing/qrcode"
)

func main() {
	// open and decode image file
	file, _ := os.Open("qrcode.jpg")
	img, _, _ := image.Decode(file)

	// prepare BinaryBitmap
	bmp, _ := gozxing.NewBinaryBitmapFromImage(img)

	// decode image
	qrReader := qrcode.NewQRCodeReader()
	result, _ := qrReader.Decode(bmp, nil)

	fmt.Println(result)
}

Generating CODE128 barcode

package main

import (
	"image/png"
	"os"

	"github.com/dieterpl/gozxing"
	"github.com/dieterpl/gozxing/oned"
)

func main() {
	// Generate a barcode image (*BitMatrix)
	enc := oned.NewCode128Writer()
	img, _ := enc.Encode("Hello, Gophers!", gozxing.BarcodeFormat_CODE_128, 250, 50, nil)

	file, _ := os.Create("barcode.png")
	defer file.Close()

	// *BitMatrix implements the image.Image interface,
	// so it is able to be passed to png.Encode directly.
	_ = png.Encode(file, img)
}