Antialiasing with direct drawing on Windows?

[Dmitriano]

Is subj supprted?

I draw a text from beforeRendering() handler with a code like this:

void LightGrid::beforeRendering()
{
    {
        QOpenGLContext * p_context = QOpenGLContext::currentContext();
        assert(p_context != nullptr && p_context->isValid());
        assert(!p_context->isOpenGLES());

        QOpenGLFunctions * gl = p_context->functions();
        gl->glEnable(GL_MULTISAMPLE);
        gl->glEnable(GL_LINE_SMOOTH);

        assert(gl->glIsEnabled(GL_MULTISAMPLE));
        assert(gl->glIsEnabled(GL_LINE_SMOOTH));
    }

    const QSize window_size = window()->size();
    QOpenGLPaintDevice device(window_size);
    QPainter painter(&device);
    painter.setRenderHint(QPainter::Antialiasing);
    painter.setRenderHint(QPainter::TextAntialiasing);
    painter.setRenderHint(QPainter::HighQualityAntialiasing);

    //Draw the text with QPainter::drawText

in main.cpp I set:

    QCoreApplication::setAttribute(Qt::AA_UseDesktopOpenGL);
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

but the text is not antialiased at least on Windows 10.

How to check if I have OpenGL properly installed on my machine?