xlibosmesa4 4.3.0.dfsg.1-6ubuntu25 (i386 binary) in ubuntu warty

Mesa off-screen rendering library [XFree86]
 Mesa is a 3D graphics library which presents an API intended to be compatible
 with OpenGL. XFree86 maintains its own version of the Mesa library (which is
 regularly resynchronized with the official one) to permit development of the
 XFree86 X server's Direct Rendering Infrastructure (DRI), which makes the 3D
 acceleration features of many modern video cards available to X client
 programmers.
 .
 The off-screen rendering library (OSMesa) is an extension to Mesa, not an
 implementation of any OpenGL standard; therefore, it is packaged separately,
 so that any OpenGL-conformant library may be installed on a Debian system,
 and OpenGL-based programs may depend on any of them. The OSMesa library,
 however, specifically depends on the Mesa library.