Method save

src/image/p5.Image.js:1449–1478

* Saves the image to a file. * * By default, `img.save()` saves the image as a PNG image called * `untitled.png`. * * The first parameter, `filename`, is optional. It's a string that sets the * file's name. If a file extension is included, as in * `img.save('drawing.png')`, then

(filename, extension)

   * }
   */
  save(filename, extension) {
    if (this.gifProperties) {
      encodeAndDownloadGif(this, filename);
    } else {
      let htmlCanvas = this.canvas;
      extension =
        extension ||
        _checkFileExtension(filename, extension)[1] ||
        'png';

      let mimeType;
      switch (extension) {
        default:
          //case 'png':
          mimeType = 'image/png';
          break;
        case 'webp':
          mimeType = 'image/webp';
          break;
        case 'jpeg':
        case 'jpg':
          mimeType = 'image/jpeg';
          break;
      }

      htmlCanvas.toBlob(blob => {
        downloadFile(blob, filename, extension);
      }, mimeType);
    }
  }

  async toBlob() {
    return new Promise(resolve => {