[Interest] Is the OpenGL vs Angle distinction important for widget apps?

[Agocs Laszlo]

That (-no-opengl builds failing) is a different problem, and a very valid one. For 5.5 on Windows we still have some patches pending to fix -no-opengl builds. Hopefully it all gets corrected by the beta.

Best regards,
Laszlo

________________________________________
From: interest-bounces+laszlo.agocs=theqtcompany.com at qt-project.org <interest-bounces+laszlo.agocs=theqtcompany.com at qt-project.org> on behalf of Nikos Chantziaras <realnc at gmail.com>
Sent: Monday, March 23, 2015 2:21 PM
To: interest at qt-project.org
Subject: Re: [Interest] Is the OpenGL vs Angle distinction important for        widget apps?

OK, that makes sense. Yeah, hidden uses of GL (by mistake or not) is
what I'm worried about.

I thought that I could make sure this won't happen by building a minimal
Qt (no Qml, no WebEngine or WebKit, etc) and with "-no-opengl", but that
won't work as it results in build errors.


On 22/03/15 18:30, Agocs Laszlo wrote:
> As long as the application is pure widgets, without ever using QOpenGL/QGL classes or QQuickWidget, it will not attempt to initialize any OpenGL stuff. (if that's not the case, it's a bug, we had some of these recently, like QTBUG-43832) This means that not having OpenGL or ANGLE working (or available) is not a problem for such apps.
>
> Starting with 5.5 the only type of pre-built packages for Windows are the dynamic GL ones, so the confusion of needing to ship ANGLE libs even for widget-only apps will go away.
>
> Cheers,
> Laszlo
>
>
> ________________________________________
> From: interest-bounces+laszlo.agocs=theqtcompany.com at qt-project.org <interest-bounces+laszlo.agocs=theqtcompany.com at qt-project.org> on behalf of Giuseppe D'Angelo <dangelog at gmail.com>
> Sent: Sunday, March 22, 2015 4:48 PM
> To: Nikos Chantziaras
> Cc: interest at qt-project.org
> Subject: Re: [Interest] Is the OpenGL vs Angle distinction important for widget apps?
>
> On 22 March 2015 at 10:28, Nikos Chantziaras <realnc at gmail.com> wrote:
>> For applications that don't use Qml and only use QWidget, does it matter
>> whether Qt was built with OpenGL or Angle on Windows?
>
> It still matters because
>
> 1) ANGLE means extra dependencies to be shipped along your app
> 2) ANGLE does not work on Windows XP
>
> So for pure-widgets applications it might make more sense to use the
> Desktop OpenGL build of Qt. YMMV :)


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