node-imagemagick/test.js at master · ONode/node-imagemagick · GitHub

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var fs = require('fs'),
  im = require('./imagemagick');

var path = __dirname + '/sample-images/blue-bottle-coffee.jpg';
var target_dst_path = __dirname + '/sample-images/';
var imdata = fs.readFileSync(path, 'binary');

im.identify(path, function (err, features) {
  if (err) return console.error(err.stack || err);
  console.log('identify(path) ->', features);
});

im.identify({data: imdata}, function (err, features) {
  if (err) return console.error(err.stack || err);
  console.log('identify({data:imdata}) ->', features);
});

im.readMetadata(path, function (err, metadata) {
  if (err) return console.error(err.stack || err);
  console.log('readMetadata(path) ->', metadata);
});

im.readMetadata({data: imdata}, function (err, metadata) {
  if (err) return console.error(err.stack || err);
  console.log('readMetadata({data:imdata} ->', metadata);
});

var timeStarted = new Date;
im.resize({
  srcPath: path,
  dstPath: 'test-resized.jpg',
  width: 256
}, function (err, stdout, stderr) {
  if (err) return console.error(err.stack || err);
  console.log('resize(...) wrote "test-resized.jpg"');
  console.log('real time taken for convert: ' + ((new Date) - timeStarted) + ' ms');
  im.identify(['-format', '%b', 'test-resized.jpg'], function (err, r) {
    if (err) throw err;
    console.log("identify(['-format', '%b', 'test-resized.jpg']) ->", r);
  })
});

timeStarted = new Date;
im.resize({
  srcData: imdata,
  width: 256
}, function (err, stdout, stderr) {
  if (err) return console.error(err.stack || err);
  console.log('real time taken for convert (with buffers): ' +
    ((new Date) - timeStarted) + ' ms');
  fs.writeFileSync(target_dst_path+'test-resized-io.jpg', stdout, 'binary');
  console.log('resize(...) wrote "test-resized.jpg" (' + stdout.length + ' Bytes)');
});