title: PDF - Ligature mapping in CMap
body: <p>I have a pdf which have following mapping:</p>
  
  <pre><code>&lt;019A&gt; &lt;0074&gt;
  &lt;039E&gt; &lt;00A9&gt;
  &lt;019F&gt; &lt;00740069&gt;
  &lt;01B5&gt; &lt;0075&gt;
  &lt;01C0&gt; &lt;0076&gt;
  &lt;01C7&gt; &lt;0079&gt;
  &lt;03EC&gt; &lt;0030&gt;
  </code></pre>
  
  <p>The mapping, cid &lt;019F> represent ligature ti.
  <br>In mapping \u0074 -> t and \u0069 -> i (hence) ligature ti.
  <br>How do I get actual ligature unicode? or I have to keep the track for such pattern and replace cid mapping with actual unicode of the ligature?</p>
  
  <p>Thanks.</p>