Help!! app qt4 upgrade to qt5 for wayland , can't get the QDialog's window handle which can cast to EGLNativeWindowType

[Steve (YiLiang) Zhou]

Thanks for your quick reply ,  I prefer to  embed an OpenGL surface into QDialog . 

 

 

Thanks and Best Regards

Steve Zhou

 

From: Giulio Camuffo [mailto:giuliocamuffo at gmail.com] 
Sent: Wednesday, August 06, 2014 5:34 PM
To: Steve (YiLiang) Zhou
Cc: wayland mailing list
Subject: Re: Help!! app qt4 upgrade to qt5 for wayland , can't get the QDialog's window handle which can cast to EGLNativeWindowType

 

 

 

2014-08-06 11:54 GMT+03:00 Steve (YiLiang) Zhou <szhou at telecomsys.com>:

Dear all,

I have app which was developed by qt4, and we want to port it to tizen ivi wayland platform, so I have to update our app to qt5.

We have a feature : drawing something based on egl on a qt window(we use QDialog). 

Egl need a EGLSurface and a EGLDisplay to get the feature work.

EGLSurface eglCreateWindowSurface(

EGLDisplay display,

 

EGLConfig config,

 

NativeWindowType native_window,

 

EGLint const * attrib_list);

In x11 based OS like ubuntu 12.04 , we use EGL_DEFAULT_DISPLAY to get display, the qt window’s winId()   to cast to NativeWindowType

It works well on X11 based OS.

But when it comes to wayland ,it will crash at eglCreateWindowSurface, I googled a lot ,but rarely got something useful.

Someone said that  to get eglCreateWindowSurface work on wayland ,the native_window has to be a wl_egl_window type. 

I tried to get it like bellow:

 

QDialog *dialog = new QDialog(mainW);

dialog->setGeometry(QRect(0, 0, 720, 430));

dialog->show();

 

QPlatformNativeInterface *native =

        QGuiApplication::platformNativeInterface();

   struct wl_display *wl_dpy = (struct wl_display *)

        native->nativeResourceForWindow("display", NULL);

    struct wl_surface *surface = static_cast<struct wl_surface *>(

        native->nativeResourceForWindow("surface", dialog->windowHandle()));

struct wl_egl_window * wl_wind = wl_egl_window_create(surface, 720,430 );

 

use the wl_wind and wl_dpy to eglCreateWindowSurface , the app didn’t crash ,but the graphics we want to draw on the window can’t be seen.

 

Is there someone met this before? Can somebody give some advices?

 

QDialog doesn't draw using OpenGL, so there is no EGL surface attached to its wl_surface.

I'm not sure what you're trying to achieve. Do you want to embed an OpenGL surface into QDialog? Or do you just want an egl surface to draw into, with no QWidgets on top?

 

--

Giulio

 

	 

	 

	Thanks and Best Regards

	Steve Zhou

	 

	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.

	
	_______________________________________________
	wayland-devel mailing list
	wayland-devel at lists.freedesktop.org
	http://lists.freedesktop.org/mailman/listinfo/wayland-devel

 


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.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/wayland-devel/attachments/20140806/0e54fc0c/attachment-0001.html>