2 (in no particular order)
5 * Allow clamping to a GL version or a number of extensions.
7 * Match the traced visuals
9 * Trace multiple threads
10 * GetCurrentThreadId()
13 * Put zlib (de)compression in a separate thread.
17 * Retrace multiple threads
19 * Provide a readline-like interactive mode to gltrace
20 * http://github.com/antirez/linenoise
21 * https://github.com/antirez/linenoise/issues#issue/8
22 * http://hg.youterm.com/radare/file/87579f8c5087/src/dietline.c
24 * Trace window sizes somehow
28 * Allow to distinguish between the calls really done by the program, vs the
29 fakes one necessary to retrace correctly.