--- ./modules/highgui/src/window_QT.cpp 2016-12-23 04:54:44.000000000 -0800 +++ ./modules/highgui/src/window_QT.cpp 2017-03-12 15:58:03.000000000 -0700 @@ -3199,7 +3199,9 @@ void OpenGlViewPort::initializeGL() { +#ifdef GL_PERSPECTIVE_CORRECTION_HINT glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); +#endif } void OpenGlViewPort::resizeGL(int w, int h)