Things To Do
                            (in no particular order)


* Determine blob sizes passed to glXxxPointer functions.

  Potentially using tricks such as:
  * http://fixunix.com/linux/337646-isbadreadptr-linux.html
  * http://www.gamedev.net/community/forums/topic.asp?topic_id=132787
  * http://msdn.microsoft.com/en-us/library/aa366781(v=VS.85).aspx
  * http://msdn.microsoft.com/en-us/library/aa366902(v=VS.85).aspx
  * http://stackoverflow.com/questions/1281686/determine-size-of-dynamically-allocated-memory-in-c

* Allow clamping to a GL version or a number of extensions.

* Trace multiple threads
  * GetCurrentThreadId()
  * pthread_self()

* Put zlib (de)compression in a separate thread.

* Trace TSCs

* Retrace multiple threads (which will imply abandoning GLUT)

* Provide a readline-like interactive mode to gltrace
  * http://github.com/antirez/linenoise
    * https://github.com/antirez/linenoise/issues#issue/8
  * http://hg.youterm.com/radare/file/87579f8c5087/src/dietline.c 

* Trace window sizes somehow

* Write snapshots as PNGs instead of BMPs

* Add new mode to compare with previous snapshots instead of writing.

* Plug memory leaks.