SlideGenerator.gs

/** this script will not run correctly until imageFolderId is correctly set
*/

var imageFolderId = "REPLACEWITHYOURGOOGLEDRIVEFOLDERID";





var imageFolder = DriveApp.getFolderById(imageFolderId);
var NAME = 'My Vehicle Images';
var deck = SlidesApp.create(NAME);

/**
 * Creates a single slide using the image from the given link;
 * used directly by foreach(), hence the parameters are fixed.
 * @param {string} imageUrl A String object representing an image URL
 * @param {number} index The index into the array; unused (req'd by forEach)
 */
function addImageSlide(imageUrl, index) {
    var slide = deck.appendSlide(SlidesApp.PredefinedLayout.BLANK);
    var image = slide.insertImage(imageUrl);
    var imgWidth = image.getWidth();
    var imgHeight = image.getHeight();
    var pageWidth = deck.getPageWidth();
    var pageHeight = deck.getPageHeight();
    var newX = pageWidth/2. - imgWidth/2.;
    var newY = pageHeight/2. - imgHeight/2.;
    image.setLeft(newX).setTop(newY);
}

/**
 * Adds images to a slides presentation.
 */
function main() {
  
  var images = [];
  var contents = imageFolder.getFiles();
  
  while (contents.hasNext()) {
   
    var file = contents.next();
    images.push(file)
  }
 
  
  var [title, subtitle] = deck.getSlides()[0].getPageElements();
  title.asShape().getText().setText(NAME);
  subtitle.asShape().getText().setText('Google Apps Script\nSlides Service demo');
  images.forEach(addImageSlide);
}