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    @gigasource/barcode-canvaskit

    1.0.1 • Public • Published

    barcode generator Build Status

    Generate 1D and 2D barcodes

    Supported 1D types

    Supported 2D types

    Requirements

    Installing

    npm install barcode
    

    Usage

    Set it up and specify your type and options. The following 3 are the only required ones.

    var barcode = require('barcode');
    var code39 = barcode('code39', {
    	data: "it works",
    	width: 400,
    	height: 100,
    });

    Next choose from the three methods below how you want to output your barcode.

    Stream

    Get a stream of the final image data. you can collect this and save out a new PNG (default type), pipe it elsewhere, or save it to a CDN.

    code39.getStream(function (err, readStream) {
    	if (err) throw err;
    
    	// 'readStream' is an instance of ReadableStream
    	readStream.pipe(CdnWriteStream);
    });

    File to disk

    Save an image out to the file system, pretty simple. Just be sure to specify your outfile.

    var outfile = path.join(__dirname, 'imgs', 'mycode.png')
    code39.saveImage(outfile, function (err) {
    	if (err) throw err;
    
    	console.log('File has been written!');
    });

    Base64 encoded img src

    Often times, barcodes are single use for a single print or whatever. With this method, we can create one on the fly and just send the base64 encoded image to the browser through the HTML.

    code39.getBase64(function (err, imgsrc) {
    	if (err) throw err;
    
    	// if we're using HTTP or another framework
    	res.end('<img src="' + imgsrc + '">');
    });

    Refactor

    Much of the underlying code for the generation is being rewritten, however the API will remain the same. As a rule, anything new will have to be testable.

    Things todo:

    • Move all checksums and ECC to a module in lib/utils
    • Use the new barcode generation class: Barcode2D.js
    • Remove uses of Barcode1D and in-place image generation
    • Create separate functions for generating sequences

    In the future:

    • Abstract drawing to be able to draw with gm or output html (bars with css or canvas)

    License

    The MIT License (MIT)

    Install

    npm i @gigasource/barcode-canvaskit

    DownloadsWeekly Downloads

    0

    Version

    1.0.1

    License

    none

    Unpacked Size

    37.8 kB

    Total Files

    17

    Last publish

    Collaborators

    • gigasource