title: libGD perl and php wrapper output differs
body: <p>I'm currently working on a project that involves a comparison between different 
  image processing libraries. One of these libraries is libGD. I'm using the perl 
  wrapper as well as the php wrapper. </p>
  
  <p>My problem now is that the same input image produces completely different output images
  depending on which wrapper was used. If I invoke the libGD function via the perl 
  wrapper the resulting image is roughly 40% larger than the output of the php wrapper.
  A difference image made with imagemagick also shows that both images are very different. </p>
  
  <p>The parametrization of both function calls is absolutely identical (quality, resolution, geometry). I also checked if there is more than one version of libGD installed on my system, there is not. </p>
  
  <p>Shouldn't both wrappers produce the same output or am I completely mistaken?</p>