Hi,
I have a QWidget app running on many platforms including iOS, using
QGraphicsScene/View, Qt 5.15.2. The scene can contains many items, be
rotated, etc.
We enable openGL QGraphicsview's viewport as it is stated in the
documentation, i.e.
QOpenGLWidget *gl = new QOpenGLWidget();
QSurfaceFormat format;
format.setSamples(4);
gl->setFormat(format);
setViewport(gl);
That works pretty well on all platforms and improves the performances,
except on iOS (tested on iOS 14), where it is exactly the opposite: all
become very very slow even in not complicated situations.
Is there something we can do to about that?
I know openGL is deprecated on iOS (replaced by Metal) does Qt supports
that?
Thanks
Philippe.
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