title: DataTables image (or at least image title) export to PDF
body: <p>Using DataTables and Buttons (<strong>NOT</strong> TableTools, which is retired) extension. Some cells have progressbars and small icons. Is there a way to export these images (or at least their titles) to PDF? Found some possible hacks on this page, but all of them were for retired TableTools.</p>
  
  <p>Checked <a href="https://datatables.net/reference/button/pdf" rel="nofollow">https://datatables.net/reference/button/pdf</a> and <a href="https://datatables.net/reference/api/buttons.exportData%28%29" rel="nofollow">https://datatables.net/reference/api/buttons.exportData%28%29</a> but couldn't find any method to achieve this goal. Tested by adding this code:</p>
  
  <pre><code>stripHtml: false
  </code></pre>
  
  <p>but whole HTML code (like img src=...) was included in PDF file instead of images.</p>
  
  <p>If exporting images isn't possible, is there a way to export at least alt or title attribute of each image? That would be enough.</p>