[Interest] QWebEngineView + QSurfaceFormat == errors in console

[Andy]

Based on this discussion I have created two issue:

"QWebEngineView outputs errors when using QSurfaceFormat::CoreProfile"
https://bugreports.qt.io/browse/QTBUG-60605

"Qt3DWindow constructor should not call QSurfaceFormat::setDefaultFormat()"
https://bugreports.qt.io/browse/QTBUG-60614

---
Andy Maloney  //  https://asmaloney.com
twitter ~ @asmaloney <https://twitter.com/asmaloney>


On Fri, May 5, 2017 at 12:12 PM, Andy <asmaloney at gmail.com> wrote:

> Thanks Sean.
>
> One of the problems is likely that I'm using Qt3DWindow which calls
> QSurfaceFormat::setDefaultFormat() in the constructor which I've already
> called in main(). I'd missed this warning in my application's output
> because I have a bunch of debug output:
>
> Warning: Warning: Setting a new default format with a different version or
> profile after the global shared context is created may cause issues with
> context sharing. (qsurfaceformat.cpp:770, static void QSurfaceFormat::setDefaultFormat(const
> QSurfaceFormat &))
>
> The docs say that setDefaultFormat() needs to be called before the
> QGuiApplication is constructed if Qt::AA_ShareOpenGLContexts is set.
>
> So it seems like Qt3DWindow shouldn't be setting the default format? Or
> documented that it's not usable with a shared context?
>
> ---
> Andy Maloney  //  https://asmaloney.com
> twitter ~ @asmaloney <https://twitter.com/asmaloney>
>
>
> On Fri, May 5, 2017 at 3:29 AM, Sean Harmer <sean.harmer at kdab.com> wrote:
>
>> On Thursday 04 May 2017 17:57:32 Thiago Macieira wrote:
>> > Em quinta-feira, 4 de maio de 2017, às 16:07:12 PDT, Andy escreveu:
>> > > Fatal: QWebEngine: Default QSurfaceFormat OpenGL profile is not
>> compatible
>> > > with the global shared context OpenGL profile. Please make sure you
>> set a
>> > > compatible QSurfaceFormat before the QtGui application instance is
>> > > created.    (render_widget_host_view_qt_delegate_widget.cpp:148,
>> > > QtWebEngineCore::RenderWidgetHostViewQtDelegateWidget::
>> RenderWidgetHostVie
>> > > wQ tDelegateWidget(QtWebEngineCore::RenderWidgetHostViewQtDeleg
>> ateClient
>> > > *, QWidget *))
>> > >
>> > > (Setting the default QSurfaceFormat is the very first thing I do in
>> main.)
>> >
>> > Looks like the Qt3D and QtWebEngine requirements for the OpenGL profile
>> are
>> > incompatible.
>>
>> Qt 3D will work with any context, compatibility or profile for modern GL
>> or no
>> profile for legacy GL. I assume that you actually need some GL 4.1
>> features if
>> that's what you're asking for. It seems like the QtWebEngine check on GL
>> version/profile is broken as the compatibility profile should be, well,
>> compatible with legacy GL.
>>
>> Cheers,
>>
>> Sean
>>
>> --
>> Dr Sean Harmer | sean.harmer at kdab.com | Managing Director UK
>> KDAB (UK) Ltd, a KDAB Group company
>> Tel. +44 (0)1625 809908; Sweden (HQ) +46-563-540090
>> Mobile: +44 (0)7545 140604
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>
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