public void OnShow()
{
_contextPtr = OpenGl.GlXCreateContext(_window.NativeHandle, ref _visualInfo, IntPtr.Zero, true);
OpenGl.GlXMakeCurrent(_window.NativeHandle, _window.WindowId, _contextPtr);
WindowExtensions.LoadDefaultOpenGLFunctions();
}
public void Cleanup()
{
OpenGl.GlXMakeCurrent(_window.NativeHandle, 0, IntPtr.Zero);
OpenGl.GlXDestroyContext(_window.NativeHandle, _contextPtr);
WindowExtensions.Cleanup();
}