[Interest] QtQuick under Windows Remote Desktop?

Tue Oct 20 20:37:46 CEST 2015

Your post was very helpful, thanks.

I’ve confirmed the driver selection works as described in the link you posted, even in the Qt 5.5.1 mingw install I’m using. I’ve lost track of what may have been at issue originally, as it all works as it’s supposed to now, but suspect perhaps I stumbled across a case where the driver selection logic errantly proceeds with OpenGL. In any case, it’s working now, thanks again for your input.

Mike

From: Shantanu Tushar [mailto:shaan7in at gmail.com]
Sent: Tuesday, October 20, 2015 3:40 AM
To: Michael R Nelson <mnelson at sutron.com>
Cc: Gunnar Roth <gunnar.roth at gmx.de>; interest at qt-project.org
Subject: Re: RE: [Interest] QtQuick under Windows Remote Desktop?

Adding to what Gunnar said, a very easy way to see what mode your app actually is running is to use http://technet.microsoft.com/en-in/sysinternals/bb896653.aspx and see what DLLs are loaded. If libGLES and friends are loaded, its ANGLE, otherwise it will be opengl32.dll from windows system directory.
Also from http://blog.qt.io/blog/2014/11/27/qt-weekly-21-dynamic-opengl-implementation-loading-in-qt-5-4/ -

Pro tip: The debug output printed from the platform plugin can be very helpful to check which implementation gets loaded. To enable these prints, set the environment variable QT_LOGGING_RULES to qt.qpa.gl<http://qt.qpa.gl>=true.

On Mon, Oct 19, 2015 at 6:53 PM, Michael R Nelson <mnelson at sutron.com<mailto:mnelson at sutron.com>> wrote:
Hi Gunnar,

I do have libegl.dll and libGLESv2.dll in qt bin folder. I’ll see if I can get better results using MSVC2013 tool-chain.

Thanks,
Mike

From: Gunnar Roth [mailto:gunnar.roth at gmx.de<mailto:gunnar.roth at gmx.de>]
Sent: Monday, October 19, 2015 9:04 AM
To: Michael R Nelson <mnelson at sutron.com<mailto:mnelson at sutron.com>>
Cc: Shantanu Tushar <shaan7in at gmail.com<mailto:shaan7in at gmail.com>>; interest at qt-project.org<mailto:interest at qt-project.org>
Subject: Aw: RE: [Interest] QtQuick under Windows Remote Desktop?

Hi Michael,
i cannot find any information concerning Qt mingw build supporting ANGLE. So I assume it does not support it. Do you have libegl and libGLESv2.dll in the qt bin folder? These are angle dlls.

My selfbuild qt with vs2012 and -opengl dynamic option configured, works with open gl and angle and uses angle when doing a remote desktop connection.
AFAIK current qt msvc build binaries also are build with opengl dynamic option.

Regards,
Gunnar

Gesendet: Montag, 19. Oktober 2015 um 14:35 Uhr
Von: "Michael R Nelson" <mnelson at sutron.com<mailto:mnelson at sutron.com>>
An: "Gunnar Roth" <gunnar.roth at gmx.de<mailto:gunnar.roth at gmx.de>>, "Shantanu Tushar" <shaan7in at gmail.com<mailto:shaan7in at gmail.com>>
Cc: "interest at qt-project.org<mailto:interest at qt-project.org>" <interest at qt-project.org<mailto:interest at qt-project.org>>
Betreff: RE: [Interest] QtQuick under Windows Remote Desktop?
Hello,

Thanks for your response.

I installed using offline installer, Qt 5.5.1 for Windows 32-bit (MinGw 4.9.2).
My OS is Windows 7, 64-bit.

Here's my main:

int main(int argc, char *argv[])
{
QCoreApplication::setAttribute(Qt::AA_UseOpenGLES);

QApplication app(argc, argv);

QQmlApplicationEngine engine;
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));

return app.exec();
}

Thanks,
Mike

-----Original Message-----
From: Gunnar Roth [mailto:gunnar.roth at gmx.de]
Sent: Saturday, October 17, 2015 2:25 PM
To: Michael R Nelson <mnelson at sutron.com<mailto:mnelson at sutron.com>>
Cc: interest at qt-project.org<mailto:interest at qt-project.org>
Subject: Re: [Interest] QtQuick under Windows Remote Desktop?

Why don’t you give us the Version of Qt, you are using ? What windows version?
Did you build qt yourself? What is your configure line , if yes?

Regards,
Gunnar

> Am 17.10.2015 um 14:36 schrieb Michael R Nelson <mnelson at sutron.com<mailto:mnelson at sutron.com>>:
>
> Hello,
>
> I would like our QtQuick app to be viewable/usable over Windows Remote Desktop. My understanding is that means using ANGLE rather than OpenGL. I thought this could be forced at run-time by calling QCoreApplication::setAttribute(Qt::AA_UseOpenGLES), but the outcome was the same (no window content and lots of OpenGL related warnings). Is a run-time switch of some sort possible? Or, must the app be compiled differently? Can someone provide some hints as to how I can get this working?
>
> Thanks,
> Mike
>
>
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--
Shantanu Tushar    (UTC +0530)
shantanu.io<http://shantanu.io>

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