[Kst] Fwd: [Kst-plot/kst] 5be7ab: graphics system needs to be set before QApplicatio...

[Nicolas Brisset]

Peter,

Regarding this opengl backend, which is clearly marked as experimental: it does not work here for me (menus are empty).
I don't feel comfortable keeping this, especially as performance is not better.

Have you tried it under Windows? Also with Qt5 where it possibly works better?

I don't understand why, but under Qt4 I get blurred text and poor performance. Maybe something is wrong in the following call?

  if (_useOpenGL) {
    setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
    setViewport(new QGLWidget);
  } else {
    setViewportUpdateMode(QGraphicsView::MinimalViewportUpdate);
    setViewport(0);
  }

Commenting out the following line in view.cpp does not make OpenGL faster, but at least it's sharp:
// setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing | QPainter::SmoothPixmapTransform)

Does anyone know more?

Nicolas

----- Mail transféré -----
De: "Nicolas Brisset" <nicolas.brisset at free.fr>
À: kst at kde.org
Envoyé: Samedi 15 Mars 2014 16:56:47
Objet: Re: [Kst] [Kst-plot/kst] 5be7ab: graphics system needs to be set before QApplicatio...

> I assume OpenGL support is just broken in Qt4.

It seems there are two viable  options for the graphics system in Qt4: native and raster.
Apparently raster can bring benefits, maybe we should check that out? But I don't know if we can activate it by default...
Have you tried it with Qt5? Is it better there?

Apart from that, has someone checked the status of translations and how does our code/build system handle them (if at all)?

Nicolas
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