GLX_MESA_set_3dfx_mode http://www.opengl.org/registry/specs/MESA/set_3dfx_mode.txt GLX_MESA_set_3dfx_mode GLX_3DFX_WINDOW_MODE_MESA 0x1 GLX_3DFX_FULLSCREEN_MODE_MESA 0x2 GLboolean glXSet3DfxModeMESA (GLint mode)