jpegoptim-stream

node-pngquant

The pngquant command line utility as a readable/writable stream.

The constructor optionally takes an array of command line options for the pngquant binary (defaults to [256]):

var PngQuant = require('pngquant'),
    myPngQuanter = new PngQuant([192, '--quality', '60-80', '--nofs', '-']);

sourceStream.pipe(myPngQuanter).pipe(destinationStream);

PngQuant as a web service (sends back a png with the number of colors quantized to 128):

var PngQuant = require('pngquant'),
    http = require('http');

http.createServer(function (req, res) {
    if (req.headers['content-type'] === 'image/png') {
        res.writeHead(200, {'Content-Type': 'image/png'});
        req.pipe(new PngQuant([128])).pipe(res);
    } else {
        res.writeHead(400);
        res.end('Feed me a PNG!');
    }
}).listen(1337);

Installation

Make sure you have node.js and npm installed, and that the pngquant binary is in your PATH, then run:

npm install pngquant

License

3-clause BSD license -- see the LICENSE file for details.

Changelog

v2.0.1 (2019-03-03)

Pull requests

• #25 Upgrade mocha to version 6.0.0 (depfu[bot])
• #24 Upgrade unexpected to version 11.0.0 (Andreas Lind, depfu[bot])
• #23 Upgrade sinon to version 7.0.0 (depfu[bot])
• #18 Upgrade which to version 1.3.1 (depfu[bot])
• #21 Upgrade sinon to version 6.3.5 (depfu[bot])
• #22 Upgrade unexpected-stream to version 3.0.0 (depfu[bot])
• #20 Upgrade mocha to version 5.2.0 (depfu[bot])
• #19 Upgrade coveralls to version 3.0.2 (depfu[bot])

Commits to master

• Update pngquant-bin to ^5.0.2 (Andreas Lind)
• Move coveralls to the after_success step on Travis (Andreas Lind)
• Use Buffer.from instead of new Buffer, avoiding deprecation warning (Andreas Lind)
• Replace istanbul with nyc (Andreas Lind)
• npm run {travis => ci} (Andreas Lind)
• +11 more