The pngquant utility as a readable/writable stream
npm install 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]):
``javascript
import PngQuant from 'pngquant';
const 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):
`javascript
import PngQuant from 'pngquant';
import http from '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);
`
Make sure you have node.js and npm installed, and that the pngquant binary is in your PATH, then run:
`
npm install pngquant
See the changelog.
3-clause BSD license -- see the LICENSE` file for details.