anti-aliasing on iOS

fober

I'm using Qt 5.5.1 to deploy my application on various platforms, including iOS.
On iOS, graphics render with aliasing whatever renderingHint I use. I know that the issue has been already raised and reported as a bug. What I can't figure out is if the problem has been solved or if a workaround exist.
Any information is welcome. Thanks

Dominique

SGaist

Hi,

To see if something has changed, try the Qt 5.6.0 beta

fober

@SGaist
I've tried but with 5.6.0 beta, my application crashes in the QApplication constructor and I really can't figure out what I can do to solve the problem.

mvuori

The bug report https://bugreports.qt.io/browse/QTBUG-35271 states that it is unsolved, but the link on the last comment https://codereview.qt-project.org/#/c/143848/ gives a lot of hope that the fix will "soon" appear on a release (as is known, "your mileage may vary" in the case of Qt bug fixes).

SGaist

That patch has been integrated so it should be in the 5.6 release

fober

Thanks for the information. I'll wait for the 5.6 release. My attempts to force the GLFormat to multisample have been vain. It gave me the feeling that Qt is overriding the GL settings.

SGaist

How are you setting up your GLFormat ?

fober

@SGaist
I used QGLFormat::setSampleBuffers(true)
ignoring other attributes that are supposed to take default values,
and next, I used the static QGLFormat::setDefaultFormat called at application initialization.

SGaist

Are you using the new QOpenGL*** classes ?

fober

@SGaist
I've also tried using the QOpenGLFunctions class but without more success.
My last attempts were only based on QGLFormat.

SGaist

Sorry, I meant QOpenGLWidget and friends