[meta-freescale] [meta-fsl-arm][RFC] qtbase: add xcb support for i.MX6

[Juha Vuolle]

Against that image with handbuilt Qt XCB QPA starting egl/gles2 won't
start with the same reason as few tries ago:

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 28
(RGB444), but this is incompatable
Unable to find an X11 visual which matches EGL config 28
Could not initialize EGL

I forced Qt to return the "Visual ID" 33 and indeed the application started.

The application title is there again but no other visual output.
Interestingly the application responds to click events etc. i.e. it is
there, just as transparent.

In xorg logs there are

[3336165.957] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
[3336165.957] (II) VIVANTE(0): using default device
[3336165.957] (II) VIVANTE(0): Creating default Display subsection in
Screen section
        "Default Screen Section" for depth/fbbpp 16/16
[3336165.957] (==) VIVANTE(0): Depth 16, (==) framebuffer bpp 16
[3336165.957] (==) VIVANTE(0): RGB weight 565
[3336165.957] (==) VIVANTE(0): Default visual is TrueColor

But I don't know how to tamper those values.

"Almost works"



2013/8/29 Juha Vuolle <juvuolle at gmail.com>:
> Hi Eric,
>
> 2013/8/29 Eric Bénard <eric at eukrea.com>:
>> Hi Juha,
>>
>> Le Thu, 29 Aug 2013 11:07:18 +0300,
>> Juha Vuolle <juvuolle at gmail.com> a écrit :
>>> Not sure where to look into next, any thoughts? Seems so close :-)
>>
>> may you please share your procedure to compile qt5 for xcb externaly
>> as you did initially ?
>> Maybe something is missing in my patch.
>
> I mostly did as in the
> https://community.freescale.com/docs/DOC-94066
>
> I suppose the interesting part is the configure line which for me was:
>
> ./configure  -v -opensource -confirm-license -no-pch -qpa xcb -qt-xcb
> -no-eglfs -no-kms -no-linuxfb -no-directfb  -opengl es2 -make libs
> -make examples -device imx6 -device-option
> CROSS_COMPILE=/home/j/yocto/fsl-master/build/tmp/sysroots/i686-linux/usr/bin/armv7a-vfp-neon-poky-linux-gnueabi/arm-poky-linux-gnueabi-
> -sysroot /home/j/yocto/fsl-master/build/tmp/sysroots/nitrogen6x
> -prefix /home/j/nx6-xcb-inst
>
> In Qt there is actually some .pro -file checks for xcb qpa
>  contains(QT_CONFIG, opengles2) {
>      DEFINES += XCB_USE_EGL
>         LIBS += -lEGL
>         HEADERS += qxcbeglsurface.h
> } else{
>      DEFINES += XCB_USE_GLX
>         HEADERS += qglxintegration.h
>         SOURCES += qglxintegration.cpp
> }
>
> Not sure if they could play some role here. Hmm..
>
>
>
>
>
>> Eric