<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style></style></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1>Thanks for your quick reply , I prefer to embed an OpenGL surface into QDialog . <o:p></o:p><o:p> </o:p><o:p> </o:p>Thanks and Best Regards<o:p></o:p>Steve Zhou<o:p></o:p><o:p> </o:p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>From: Giulio Camuffo [mailto:giuliocamuffo@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<o:p></o:p></div><o:p> </o:p><div><o:p> </o:p><div><o:p> </o:p><div>2014-08-06 11:54 GMT+03:00 Steve (YiLiang) Zhou <<a href="mailto:szhou@telecomsys.com" target="_blank">szhou@telecomsys.com</a>>:<o:p></o:p><div><div>Dear all,<o:p></o:p>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.<o:p></o:p>We have a feature : drawing something based on egl on a qt window(we use QDialog). <o:p></o:p>Egl need a EGLSurface and a EGLDisplay to get the feature work.<o:p></o:p><table class=MsoNormalTable border=0 cellpadding=0><tr><td style='border:solid black 1.0pt;background:#E6E6E6;padding:.75pt .75pt .75pt .75pt'>EGLSurface eglCreateWindowSurface(<o:p></o:p></td><td style='border:solid black 1.0pt;background:#E6E6E6;padding:.75pt .75pt .75pt .75pt'>EGLDisplay display,<o:p></o:p></td></tr><tr><td style='border:solid black 1.0pt;background:#E6E6E6;padding:.75pt .75pt .75pt .75pt'> <o:p></o:p></td><td style='border:solid black 1.0pt;background:#E6E6E6;padding:.75pt .75pt .75pt .75pt'>EGLConfig config,<o:p></o:p></td></tr><tr><td style='border:solid black 1.0pt;background:#E6E6E6;padding:.75pt .75pt .75pt .75pt'> <o:p></o:p></td><td style='border:solid black 1.0pt;background:#E6E6E6;padding:.75pt .75pt .75pt .75pt'>NativeWindowType native_window,<o:p></o:p></td></tr><tr><td style='border:solid black 1.0pt;background:#E6E6E6;padding:.75pt .75pt .75pt .75pt'> <o:p></o:p></td><td style='border:solid black 1.0pt;background:#E6E6E6;padding:.75pt .75pt .75pt .75pt'>EGLint const * attrib_list);<o:p></o:p></td></tr></table>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<o:p></o:p>It works well on X11 based OS.<o:p></o:p>But when it comes to wayland ,it will crash at eglCreateWindowSurface, I googled a lot ,but rarely got something useful.<o:p></o:p>Someone said that to get eglCreateWindowSurface work on wayland ,the native_window has to be a wl_egl_window type. <o:p></o:p>I tried to get it like bellow:<o:p></o:p> <o:p></o:p>QDialog *dialog = new QDialog(mainW);<o:p></o:p>dialog->setGeometry(QRect(0, 0, 720, 430));<o:p></o:p>dialog->show();<o:p></o:p> <o:p></o:p>QPlatformNativeInterface *native =<o:p></o:p> QGuiApplication::platformNativeInterface();<o:p></o:p> struct wl_display *wl_dpy = (struct wl_display *)<o:p></o:p> native->nativeResourceForWindow("display", NULL);<o:p></o:p> struct wl_surface *surface = static_cast<struct wl_surface *>(<o:p></o:p> native->nativeResourceForWindow("surface", dialog->windowHandle()));<o:p></o:p>struct wl_egl_window * wl_wind = wl_egl_window_create(surface, 720,430 );<o:p></o:p> <o:p></o:p>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.<o:p></o:p> <o:p></o:p>Is there someone met this before? Can somebody give some advices?<o:p></o:p></div></div><div><o:p> </o:p></div><div>QDialog doesn't draw using OpenGL, so there is no EGL surface attached to its wl_surface.<o:p></o:p></div><div>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?<o:p></o:p></div><div><o:p> </o:p></div><div>--<o:p></o:p></div><div>Giulio<o:p></o:p></div><div> <o:p></o:p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div> <o:p></o:p> <o:p></o:p>Thanks and Best Regards<o:p></o:p>Steve Zhou<o:p></o:p> <o:p></o:p></div>CONFIDENTIALITY NOTICE: The information contained in this message may be privileged and/or confidential. 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