Access to gallery item dimensions?

Question

I know we can't use something like {{item.dimensions}} in a custom gallery layout, but does anybody know of a way to access image dimensions without having to resize them algorithmically?

Answer 1

I need the dimensions for use with  data-size="" and data-med-size="" as per the use case below. The application works acceptably with the small and large versions of the images pre-defined programmatically, but it'd be far better to use the normal image sizes, especially because this current setup doesn't exactly sit well with portraits!
<div class="collection-gallery" itemscope itemtype="http://schema.org/ImageGallery">
    {% for item in items %}
    <a class="gallery-item" href="{{item.link}}?Action=thumbnail&amp;Width=1200&amp;Height=772&algorithm=fill_proport ional"
      data-size="1200x772"
      data-med="{{item.link}}?Action=thumbnail&amp;Width=1024&amp;Height=641&algorithm=fill_pro portional"
      data-med-size="1024x641"
      data-author="" itemscope itemtype="http://schema.org/ImageObject">
          <img src="{{item.thumbnailLink}}" alt="" itemprop="thumbnail" />
          <figure itemprop="caption description">{{item.description}}</figure>
      </a>
    {% endfor %}
</div>