glitch-canvas/src/output/node/toJPGStream.js

JavaScript library for applying a glitch effect to a canvas element

// https://github.com/Automattic/node-canvas#canvasjpegstream-and-canvassyncjpegstream
import loadBase64Image from '../../util/loadBase64Image';
import canvasFromImage from '../../util/canvasFromImage';

export default function (base64URL, options, resolve, reject) {
	options = options || {};

	const streamParams = {
		bufsize: options.bufsize || 4096,
		quality: options.quality || 75,
		progressive: options.progressive || false,
	};

	loadBase64Image(base64URL).then(image => {
		const c = canvasFromImage(image);
		const stream = c.canvas.jpegStream(streamParams);
		resolve(stream);
	}, reject);
}