var Jimp = require('jimp'); module.exports = function(cb, physicalPath, mimeType, maxWidth, maxHeight) { Jimp.read(physicalPath, function (err, loadedImage) { if (err) { cb(err); } loadedImage .contain(maxWidth > 0 ? maxWidth : Jimp.AUTO, maxHeight > 0 ? maxHeight : Jimp.AUTO) .getBuffer(mimeType, function(err, buffer) { cb(err, { base64: buffer && buffer.toString('base64') }); }); }); }