title: Cairo graphics: Engrave a text in a figure and also making it transparently
body: <p>I have a question regarding Cairo codings (<a href="http://cairographics.org/" rel="nofollow">http://cairographics.org/</a>).</p>
  
  <p>I have a filled rectangle (cairo_fill (cr)), how can I cut a hole in the middle of it representing for example the letter "S"?</p>
  
  <p>So basically, I want to "engrave" text in that rectangle but also making the text transparent (like cutting a hole in the rectangle).</p>
  
  <p>Anyone have any tips?</p>