Hi,
somehow the Hardware Accerlation with GLWidget doesn’t work.
I think I am missing something trivial.
thats how my code looks like:
1. int main(int argc, char *argv[])
2. {
3. QApplication a(argc, argv);
4. a.setGraphicsSystem("native");
5.
6. QGraphicsScene scene;
7. scene.setSceneRect(0.0, 0.0, 500.0, 500.0);
8.
9.
10. QGraphicsView view(&scene);
11. view.setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
12. view.setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
13.
14. QGLFormat fmt = QGLFormat::defaultFormat();
15.
16. fmt.setDoubleBuffer(true);
17. fmt.setSwapInterval(1);
18.
19. QGLWidget* glWidget = new QGLWidget(fmt);
20.
21. view.setGeometry(0, 0, 500, 500);
22. view.setViewport(glWidget);
23.
24. view.setViewportUpdateMode(
25. QGraphicsView::FullViewportUpdate);
26.
27. view.viewport()->setAttribute(Qt::WA_OpaquePaintEvent);
28. view.viewport()->setAttribute(Qt::WA_NoSystemBackground);
29.
30.
31. MainWindow w(&scene);
32.
33. view.show();
34.
35. return a.exec();
36. }
The cpu load ist steally quite heavy (~90 %)
Does anyone has an idea why it’s not working?
I am using the same settings with a QML/C++ application and it works fine
.. with hardware accerlation.
Dietrich
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