Introduction to gifwrap

gifwrap is a powerful JavaScript library designed to work with GIF images. It simplifies the process of creating, editing, and composing GIFs. In this guide, we will explore various gifwrap APIs along with practical examples that demonstrate their functionality.

Getting Started

First, make sure to include gifwrap in your project by running:

  
  npm install gifwrap
  

Basic Usage

Importing the library and basic setup:

  
  const { Gif, GifFrame, GifUtil } = require('gifwrap');
  

Create a new GIF:

  
  const newGif = new Gif();
  

Loading and Saving GIFs

Load a GIF from a file:

  
  GifUtil.read('input.gif').then(inputGif => {
      console.log('GIF loaded', inputGif);
  });
  

Save a GIF to a file:

  
  GifUtil.write('output.gif', gif).then(() => {
      console.log('GIF saved');
  });
  

Manipulating Frames

Add a new frame to a GIF:

  
  const frame = new GifFrame({ width: 100, height: 100, bitmap: new Buffer(100 * 100 * 4) });
  gif.addFrame(frame);
  

Extract all frames from a GIF:

  
  const frames = gif.frames;
  

Combining GIFs

Combine multiple GIFs into one:

  
  Promise.all([GifUtil.read('gif1.gif'), GifUtil.read('gif2.gif')]).then(([gif1, gif2]) => {
      const combinedGif = GifUtil.concat([gif1, gif2]);
      GifUtil.write('combined.gif', combinedGif);
  });
  

Example Application

Here is a complete example that demonstrates how to use the APIs discussed above to create an app that loads, manipulates, and saves GIFs:

  
  const { Gif, GifFrame, GifUtil } = require('gifwrap');

  GifUtil.read('input.gif').then(inputGif => {
      const newFrame = new GifFrame({ width: 100, height: 100, bitmap: new Buffer(100 * 100 * 4) });
      inputGif.addFrame(newFrame);

      GifUtil.write('output.gif', inputGif).then(() => {
          console.log('GIF with new frame saved');
      });
  });
  

With these examples, you now have a good understanding of the gifwrap library and its capabilities. Happy coding!

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