"OpenGL" is a trademark of the Khronos Group, and there are implementations, like Mesa3D, that do not have permission to use that trademark. Mesa's implementati

"OpenGL" is a trademark of the Khronos Group, and there are implementations, like Mesa3D, that do not have permission to use that trademark. Mesa's implementation is (somewhat jokingly) known as "MesaGL" but is definitely a reasonable and performant GL implementation. "GL" works well for referring to the graphics language without invoking the trademark.