gameswf (pronounced "game swiff") is an open source public domain library for parsing and rendering SWF movies, using 3D hardware APIs for rendering. It is designed to be used as a UI library for video games.It is written in C++, and compiles under Windows, Mac OS X and Linux, using GCC and MSVC. It includes code for rendering with OpenGL. The rendering module is factored out so that the code can ported to other APIs. gameswf is used by other open source projects such as Gnash.