Qt5 + OpenGL ES2 + Linux + EGLFS + Wandboard (armhf)

[Alfonso Tamés]

I am trying to build Qt for eglfs and linuxfb applications using Wandboard and Future Electronics LCD.

I am using an image made from Robert Nelson's guide (http://eewiki.net/display/linuxonarm/Wandboard) with the framebuffer only drivers provided by Timesys (https://www.dropbox.com/s/0dpghzo9u1coqt2/vivante-hf-fbonly.tar.xz)

So far, I am able to build Qt5.2.0 in the Wandboard following these instructions:

$ git clone git://gitorious.org/qt/qt5.git qt5

$ ./init-repository --no-webkit

* Adding these lines at the end of qtbase/mkspecs/linux-g++/qmake.conf

QMAKE_LIBS_OPENGL_ES2 =  -lGLES_CL -lGLES_CM -lVDK -lGLSLC -lGLESv2 -lEGL
QMAKE_LIBS_OPENVG = -lOpenVG_355 -lOpenVG_3D -lOpenVG -lVDK


IMX6_CFLAGS             = -march=armv7-a -mfpu=neon -DLINUX=1 -DEGL_API_FB=1
IMX6_CFLAGS_RELEASE     = -O2 $$IMX6_CFLAGS
QMAKE_CFLAGS_RELEASE   += $$IMX6_CFLAGS_RELEASE
QMAKE_CXXFLAGS_RELEASE += $$IMX6_CFLAGS_RELEASE
QMAKE_CFLAGS_DEBUG     += $$IMX6_CFLAGS
QMAKE_CXXFLAGS_DEBUG   += $$IMX6_CFLAGS

* And configuring with these options:

$ ./configure -v -opensource -confirm-license -no-pch -no-xcb -no-opengl -opengl es2 -no-icu

* For Wandboard Quad:

$ make -j 4

Everything builds fine and make install puts Qt5 in /usr/local/Qt-5.2.0

The problem is that running the examples using eglfs throws an error:

root@linaro-alip:/usr/local/Qt-5.2.0/examples/opengl/hellogl_es2# ./hellogl_es2 -platform eglfs
QSocketNotifier: Can only be used with threads started with QThread
EGLFS: Unable to query physical screen size, defaulting to 100 dpi.
EGLFS: To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).
EGL Error : Could not create the egl surface: error = 0x300b


Aborted (core dumped)

I tried to set-up the environmental variables, but again the same error:

# export QT_QPA_EGLFS_DEPTH=16
# export DISPLAY=:0
# export QT_QPA_EGLFS_PHYSICAL_WIDTH=100
# export QT_QPA_EGLFS_PHYSICAL_HEIGHT=80


root@linaro-alip:/usr/local/Qt-5.2.0/examples/opengl/hellogl_es2# ./hellogl_es2 -platform eglfs
QSocketNotifier: Can only be used with threads started with QThread
EGL Error : Could not create the egl surface: error = 0x300b


Aborted (core dumped)

Has anyone succeeded with Qt5 / EGLFS / OpenGL ES2 and the Wandboard using armhf?

Thanks,

Alfonso Tamés

[Wand Board]

Did you already look at Yocto 1.5 by any chance?

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[Alfonso Tamés]

Not yet! I'll check it today.

Thanks,

Alfonso

[Alfonso Tamés]

Well, I tried to build Yocto Dora (the Master branch is broken since its not finding a recipe for cmake) with meta-qt5 and tried to build a core-image-minimal image. It fails with lots of errors in qurl.h. I am attaching a file with bitbake's output if anyone is interested.

Cheers,

Alfonso


On Tuesday, October 29, 2013 2:48:50 AM UTC-6, www.wandboard.org wrote:

[Alfonso Tamés]

This patch solves the problem and lets Yocto build Qt5.

http://patchwork.openembedded.org/patch/60673/

Regards,

Alfonso

[Otavio Salvador]

On Thu, Nov 7, 2013 at 2:32 AM, Alfonso Tamés <alfons...@gmail.com> wrote:
>
> This patch solves the problem and lets Yocto build Qt5.
>
> http://patchwork.openembedded.org/patch/60673/

As explained by Martin, in openembedded-devel mailing list thread,
this is a workaround. Quoting him:

"We had similar problem, but fixed gles2 provider instead, in our case we
were using libhybris and the fix was to prevent loading X11 headers when
we want to use just gles2 from it.

Similar changes were added to mesa lately, can you do the same with
gles2 provider on your platform?"

So the right fix here is to pass the proper options to Vivante drivers
and/or patch its headers to do the right thing.

--
Otavio Salvador O.S. Systems
http://www.ossystems.com.br http://code.ossystems.com.br
Mobile: +55 (53) 9981-7854 Mobile: +1 (347) 903-9750

[Alfonso Tamés]

Yes, Yocto 1.5 (master branch and Dora) with meta-qt5 are giving the same error :(

[Michele Adduci]

Hi

have you solved the running of OpenGL GLES2 demos with Qt on framebuffer?

[Lucas Rocha]

Dos anyone create a compleat qt 5.3.2 including all the features , Qwebkit , Qml , and all?

I´m trying but , when i test any aplication im getting the message below :

root@wandboard-quad:/usr/share/cinematicexperience-1.0# ./Qt5_CinematicExperience -platform eglfs

QEglFSImx6Hooks will set environment variable FB_MULTI_BUFFER=2 to enable double buffering and vsync.

 If this is not desired, you can override this via: export QT_EGLFS_IMX6_NO_FB_MULTI_BUFFER=1

mxc_sdc_fb fb.26: 800x480 h_sync,r,l: 10,164,89  v_sync,l,u: 10,10,23 pixclock=33500000 Hz

Segmentation fault

any idea?

Lucas

[Alfonso Tamés]

Yes, try Yocto 1.7 (Dizzy). The problem was the color bit depth setting. It's now solved.

[Alfonso Tamés]

Have you tried with Yocto 1.7 Dizzy?

Have you tried this: http://wiki.wandboard.org/index.php/Building_Qt5_using_yocto_on_Wandboard ?

[Lucas Rocha]

I will try it today , but just to be sure i need just to git clone -b dizzy git://git.yoctoproject.org/poky.git
in the source folder and run bitbake again  ?

Thanks

Lucas

[Alfonso Tamés]

Follow the steps in this guide: http://wiki.wandboard.org/index.php/Getting_started_with_Yocto_on_Wandboard

And then for Qt5: http://wiki.wandboard.org/index.php/Building_Qt5_using_yocto_on_Wandboard

Good luck