pub type PFN_glAlphaFragmentOp2ATI = unsafe extern "system" fn(_op: GLenum, _dst: GLuint, _dstMod: GLuint, _arg1: GLuint, _arg1Rep: GLuint, _arg1Mod: GLuint, _arg2: GLuint, _arg2Rep: GLuint, _arg2Mod: GLuint);