code: function wasFitToWindow (enabledElement, oldCanvasWidth, oldCanvasHeight) {
    const scale = enabledElement.viewport.scale;
    const imageSize = getImageSize(enabledElement.image, enabledElement.viewport.rotation);
    const imageWidth = Math.round(imageSize.width * scale);
    const imageHeight = Math.round(imageSize.height * scale);
    const x = enabledElement.viewport.translation.x;
    const y = enabledElement.viewport.translation.y;
  
    return (imageWidth === oldCanvasWidth && imageHeight <= oldCanvasHeight) ||
      (imageWidth <= oldCanvasWidth && imageHeight === oldCanvasHeight) &&
      (x === 0 && y === 0);
  }
docs: Checks if the image of a given enabled element fitted the window
  before the resize
  
  @param {EnabledElement} enabledElement The Cornerstone Enabled Element
  @param {number} oldCanvasWidth The width of the canvas before the resize
  @param {number} oldCanvasHeight The height of the canvas before the resize
  @return {Boolean} true if it fitted the windows, false otherwise