[Development] Are there any limitations on implementing the changing of the screen for a QWindow on systems using EGLFS?

[Laszlo Agocs]

Sure, you could add something like that on top once the basic multiple QScreen support is in place. (for HDMI at least, replicating more or less what 'tvservice' does. Not sure what (if any) API you have for other type of displays, though.)

Laszlo

________________________________
From: Development <development-bounces+laszlo.agocs=qt.io at qt-project.org> on behalf of Dominik Holland <dominik.holland at pelagicore.com>
Sent: Tuesday, July 26, 2016 4:00 PM
To: development at qt-project.org
Subject: Re: [Development] Are there any limitations on implementing the changing of the screen for a QWindow on systems using EGLFS?

Hi,

Am 07/26/2016 um 03:33 PM schrieb Laszlo Agocs:
> Lack of contributions and suitable hardware setup. There was a patch for
> making the target screen configurable via an environment variable which
> never made it to integration. We are now reviving it for 5.6 at
> https://codereview.qt-project.org/#/c/166117/
>

Can't we do something similar to QT_QPA_EGLFS_KMS_CONFIG and share the
json file setup here as well ? This would make it way more consistent.

Dominik

>
> Additional patches for discovering and exposing all available screens as
> separate QScreens are welcome. Not entirely sure about the feasibility,
> especially when it comes to discovering and monitoring the connected
> outputs, but it is definitely worth a try.
>
>
> Best regards,
>
> Laszlo
>
>
> <https://codereview.qt-project.org/#/c/166117/>
>
> ------------------------------------------------------------------------
> *From:* Development
> <development-bounces+laszlo.agocs=qt.io at qt-project.org> on behalf of
> Verebélyi Viktor <vviktor2 at gmail.com>
> *Sent:* Sunday, July 24, 2016 8:28:15 AM
> *To:* development at qt-project.org
> *Subject:* [Development] Are there any limitations on implementing the
> changing of the screen for a QWindow on systems using EGLFS?
>
>
> I looked at the code for the EGLFS BRCM integration and the screen it
> uses is hard-coded. After trying some test code for Dispmanx it seems
> that it is fairly straight forward to change the screen it uses.
>
> My question is: Are there any limitations to implementing the functions
> that would allow us to change the screen using QWindows->setScreen()?
>
> The reason for why I'm asking is, because I'd like to implement this,
> but I'd like to know whether if this is not implemented beacuse of some
> limitations or because of lack of intrest/contributors?
>
>
>
> --
> - Viktor Verebelyi
>
>
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>

--
Dominik Holland
SENIOR SOFTWARE ENGINEER

Pelagicore AG
Balanstr. 55, 81541 Munich, Germany
+49 (0)171 760 25 96
dominik.holland at pelagicore.com
www.pelagicore.com<http://www.pelagicore.com>

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