node-webpmux - npm Package Compare versions

Comparing version 3.1.6 to 3.1.7

examples.js

@@ -90,3 +90,3 @@ /*
 // Or for all the frames to disk
-await anim.demux('directory/to/place/then');
+await anim.demux('directory/to/place/them');
 
@@ -99,1 +99,39 @@ // To export to a Buffer instead. Supports the three variants described for .demux() above
 img.exif = fs.readFileSync('metadata.exif');
+
+// For a quick-and-dirty way to set frame data via a Worker for a moderate speed-up from threaded saving. This example is using NodeJS Workers, but should also work via Web Workers in a browser.
+
+// saver.js
+const { Worker } = require('worker_threads');
+const WebP = require('node-webpmux');
+function spawnWorker(data) {
+  return new Promise((res, rej) => {
+    let worker = new Worker('saver.worker.js', { workerData: data });
+    worker.on('message', res);
+    worker.on('error', rej);
+    worker.on('exit', (code) => { if (code != 0) { rej(new Error(`Worker stopped with exit code ${code}`)); } });
+  });
+}
+async function go() {
+  let img = await WebP.Image.load('anim.webp'), newFrames = [], promises = [];
+  /* populate newFrames via getFrameData and make changes as desired */
+  for (let i = 0, { frames } = img.data, l = frames.length; i < l; i++) {
+    promises.push(spawnWorker({ webp: img, frame: i, data: newFrames[i] }).then((newdata) => { img.data.frames[i] = newdata; }));
+  }
+  await Promise.all(promises);
+  await img.save('newanim.webp');
+}
+go().then(/* ... */)'
+
+// saver.worker.js
+const { parentPort, workerData } = require('worker_threads');
+const WebP = require('node-webpmux');
+
+async function saveFrame(d) {
+  let { data, frame, webp } = d;
+  let img = WebP.Image.from(webp);
+  await WebP.Image.initLib();
+  await img.setFrameData(frame, data, { lossless: 9 });
+  return img.data.frames[frame];
+}
+
+parentPort.postMessage(await saveFrame(workerData));

package.json

 {
   "name": "node-webpmux",
-  "version": "3.1.6",
+  "version": "3.1.7",
   "description": "A pure Javascript/WebAssembly re-implementation of webpmux",
@@ -5,0 +5,0 @@ "main": "webp.js",

README.md

@@ -248,2 +248,7 @@ # node-webpmux
 
+##### `Image.from(webp)`
+Use the contents of `webp` and return a new Image using them.<br />
+Mainly useful for passing Image into a Web Worker or NodeJS Worker and converting the passed object back into an Image instance.<br />
+Such an approach can be used to greatly speed up saving of animations or multiple images as libwebp is *not* multi-threaded beyond saving the alpha layer of lossy images.
+
 ##### `async Image.save(path, options)`
@@ -250,0 +255,0 @@ Save the `options` using `Image.getEmptyImage()`.<br />

webp.js

@@ -398,2 +398,9 @@ // For more information on the WebP format, see https://developers.google.com/speed/webp/docs/riff_container
   }
+  static from(webp) {
+    let img = new Image();
+    img.data = webp.data;
+    img.loaded = webp.loaded;
+    img.path = webp.path;
+    return img;
+  }
 }
@@ -400,0 +407,0 @@ module.exports = {

New alerts

Network access

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This module accesses the network.

Found 1 instance in 1 package

Uses eval

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Package uses dynamic code execution (e.g., eval()), which is a dangerous practice. This can prevent the code from running in certain environments and increases the risk that the code may contain exploits or malicious behavior.

Found 1 instance in 1 package

Filesystem access

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Accesses the file system, and could potentially read sensitive data.

Found 1 instance in 1 package

Fixed alerts

Network access

Supply chain risk

This module accesses the network.

Found 1 instance in 1 package

Uses eval

Supply chain risk

Package uses dynamic code execution (e.g., eval()), which is a dangerous practice. This can prevent the code from running in certain environments and increases the risk that the code may contain exploits or malicious behavior.

Found 1 instance in 1 package

Filesystem access

Supply chain risk

Accesses the file system, and could potentially read sensitive data.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

517444

0.39%

Lines of code

1248

3.31%

Number of lines in readme file

424

1.19%

No dependency changes