[Interest] Help!! app qt4 upgrade to qt5 for wayland on tizen ivi, can't get the QDialog's window handle which can cast to EGLNativeWindowType

[Giulio Camuffo]

2014-08-08 11:25 GMT+03:00 Steve (YiLiang) Zhou <szhou at telecomsys.com>:
> Thanks Giulio,
> Our app has an render thread which use opengl api to draw something like map on eglsurface.
> So I was thinking about to use  a QGLWidget to render it , just call glwidget->makeCurrent() when the render thread ready to draw a frame.
> I don't need to embed a QGLWidget to another waylandwindow, just new a QGLWidget which is a child of our app mainwindow(qt mainwindow).
> I tried to do it ,but got errors like this: "Cannot make QOpenGLContext current in a different thread" and crash .
> Is my solution theoretically make sense?

If you don't need to embed it it's probably better to use a QWindow
with a QOpenGLContext instead of QGLWidget. It requires a bit more of
boilerplate code but it gives you more freedom to do exactly what you
want.

>
> Thanks and Best Regards
> Steve Zhou
>
>
> -----Original Message-----
> From: Giulio Camuffo [mailto:giuliocamuffo at gmail.com]
> Sent: Friday, August 08, 2014 2:54 PM
> To: Steve (YiLiang) Zhou
> Cc: Filip Piechocki; interest at qt-project.org
> Subject: Re: [Interest] Help!! app qt4 upgrade to qt5 for wayland on tizen ivi, can't get the QDialog's window handle which can cast to EGLNativeWindowType
>
> 2014-08-08 7:52 GMT+03:00 Steve (YiLiang) Zhou <szhou at telecomsys.com>:
>> Hi Filip,
>>
>> I got what you mean, so if I use QGLWidget to get the wl_suface and
>> createeglwindow , it can work theoretically ,right?
>
> You're not supposed to get the wl_surface or anything like that, QGLWidgets abstracts it away.
> Anyway, this is kinda a moot discussion because currently you can't embed a QGLWidget in another window on wayland, the qpa plugin lacks support for it, and then the compositor may too (Weston is fine but QtCompositor wouldn't support it yet).
>
> So you're out of luck, if you want it working now. Maybe if you say exactly what you want to achieve on a high level we can find another way to do it.
>
> --
> Giulio
>
>
>>
>>
>>
>> Thanks and Best Regards
>>
>> Steve Zhou
>>
>>
>>
>> From: Filip Piechocki [mailto:fpiechocki at gmail.com]
>> Sent: Friday, August 08, 2014 12:40 PM
>> To: Steve (YiLiang) Zhou
>> Cc: interest at qt-project.org Interest
>>
>>
>> Subject: Re: [Interest] Help!! app qt4 upgrade to qt5 for wayland on
>> tizen ivi, can't get the QDialog's window handle which can cast to
>> EGLNativeWindowType
>>
>>
>>
>> Hi,
>> As Giulio wrote, it is not clear what you want to achieve. If you want
>> to draw with OpenGL on a Qt widget, there is a QGLWidget which is
>> supposed for that (or its actual replacement - QOpenGLWidget, but it
>> will be introduced in 5.4 if I'm not wrong here, you can try the
>> latest snapshot). QDialog is not supposed for that.
>>
>> BR,
>> Filip
>>
>> On Aug 8, 2014 3:57 AM, "Steve (YiLiang) Zhou" <szhou at telecomsys.com> wrote:
>>
>> Hi Thiago,
>> Thanks for your  reply, Giulio did give me some advices to try , but
>> I'm not so familiar with qt and wayland ,so I post the help request
>> here too.
>> Can you or Giulio give me some sample codes so that I can get this work?
>> Anyway thank you guys very much for your replys.
>>
>>
>>
>> Thanks and Best Regards
>> Steve Zhou
>>
>> -----Original Message-----
>> From: Thiago Macieira [mailto:thiago.macieira at intel.com]
>> Sent: Thursday, August 07, 2014 10:19 PM
>> To: interest at qt-project.org
>> Cc: Steve (YiLiang) Zhou
>> Subject: Re: [Interest] Help!! app qt4 upgrade to qt5 for wayland on
>> tizen ivi, can't get the QDialog's window handle which can cast to
>> EGLNativeWindowType
>>
>> On Thursday 07 August 2014 15:51:31 Steve  Zhou wrote:
>>> Dear all,
>>
>> Hi Steve
>>
>> Didn't Giulio reply to you on this very subject on the wayland mailing
>> list?
>> Giulio is Qt Wayland's co-maintainer, so his answer there is the best
>> you're going to get.
>>
>> Is there anything new?
>> --
>> Thiago Macieira - thiago.macieira (AT) intel.com
>>   Software Architect - Intel Open Source Technology Center
>>
>>
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> CONFIDENTIALITY NOTICE: The information contained in this message may be privileged and/or confidential. If you are not the intended recipient, or responsible for delivering this message to the intended recipient, any review, forwarding, dissemination, distribution or copying of this communication or any attachment(s) is strictly prohibited. If you have received this message in error, please notify the sender immediately, and delete it and all attachments from your computer and network.