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ManualFocus on iPad (6th gen)



  • Hi all,

    I'm building an iOS camera app ( which I'm testing on the iPad 6th gen ( early 2018 ) ) and I'm confused by the output I get from QCameraFocus. I am wondering if it could possibly be a bug, but I don't really know how to confirm if it is indeed one, or if it's a limitation of the camera or a limitation of something else. I use this bit of code to get the QCameraFocus from the camera and check it's available focus modes:

                QCameraFocus * qcf = camera->getCamera()->focus();
                qInfo() << qcf->isFocusModeSupported(QCameraFocus::ManualFocus);
                qInfo() << qcf->isFocusModeSupported(QCameraFocus::HyperfocalFocus);
                qInfo() << qcf->isFocusModeSupported(QCameraFocus::InfinityFocus);
                qInfo() << qcf->isFocusModeSupported(QCameraFocus::AutoFocus);
                qInfo() << qcf->isFocusModeSupported(QCameraFocus::ContinuousFocus);
                qInfo() << qcf->isFocusModeSupported(QCameraFocus::MacroFocus);
    

    It returns true only for AutoFocus and ContinuousFocus, everything else returns false. Now, the reason why I think there might be a problem here is because if I use the default camera app on the iPad, I am able to set the focus manually to any point on the image ( this would be manual focus I suppose ). Therefore, since it can be done in another app, I can safely assume that it is supported by the camera, right? So, why does it show as not supported in Qt?

    Any thoughts on the issue would be appreciated.

    Cheers,

    E.


  • Lifetime Qt Champion

    @errollgarner Could be a bug. You can search in Qt bug tracker and file a bug if it is not already filed.



  • I should have done that first. It is indeed a reported bug. It has been around since Qt 5.7 apparently. (https://bugreports.qt.io/browse/QTBUG-55613)


  • Qt Champions 2016

    @errollgarner please add the link to the bug issue here and mark as solved.


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