[yocto] iMX6UL - QtQuick - QtQuick2DRenderer

[Stefano Zuín]

Hi all,

I'm trying to run a graphical Qt application based in QtQuick2 and QML 
(example calqtr) in my iMX6UL (Variscite's Dart6UL). As this device 
doesn't have GPU, I have to use QtQuick2DRenderer to substitute openGL. 
I'm using Ubuntu 14.04 64bits and Krogoth 2.1.2

I have the enterprise license, followed the Qt's instructions 
(http://doc.qt.io/QtQuick2DRenderer/qtquick2drenderer-installation-guide.html) 
and use the qmake built with meta-toolchain-qt5. So QtQuick2DRenderer is 
correctly installed.

Then, before run the app, I declared export 
QMLSCENE_DEVICE=softwarecontext before running the application. 
Unfortunately, I get the next message when try to run a demo example:

./calqlatr --platform linuxfb
QML debugging is enabled. Only use this in a safe environment.
This plugin does not support createPlatformOpenGLContext!
Failed to create OpenGL context for format QSurfaceFormat(version 2.0, 
options QFlags(), depthBufferSize 24, redBufferSize -1, greenBufferSize 
-1, blueBufferSize -1, alphaBufferSize -1, stencilBufferSize 8, samples 
-1, swapBehavior 2, swapInterval 1, profile  0)
Aborted (core dumped)

I did the SDK using meta-toolchain-qt5 and the image with fsl-image-qt5. 
When I run a console app or a graphical which uses QtQuick 1, it works 
correctly.

This is my conf/local.conf file:

MACHINE ??= 'imx6ul-var-dart'
DISTRO ?= 'fsl-imx-fb'
PACKAGE_CLASSES ?= "package_rpm"
EXTRA_IMAGE_FEATURES ?= "debug-tweaks"
USER_CLASSES ?= "buildstats image-mklibs"
PATCHRESOLVE = "noop"
BB_DISKMON_DIRS = "\
     STOPTASKS,${TMPDIR},1G,100K \
     STOPTASKS,${DL_DIR},1G,100K \
     STOPTASKS,${SSTATE_DIR},1G,100K \
     STOPTASKS,/tmp,100M,100K \
     ABORT,${TMPDIR},100M,1K \
     ABORT,${DL_DIR},100M,1K \
     ABORT,${SSTATE_DIR},100M,1K \
     ABORT,/tmp,10M,1K"
PACKAGECONFIG_append_pn-qemu-native = " sdl"
PACKAGECONFIG_append_pn-nativesdk-qemu = " sdl"
CONF_VERSION = "1"

DL_DIR ?= "${BSPDIR}/downloads/"
ACCEPT_FSL_EULA = "1"

# Add Eclipse debug and Qt creator support to your images
EXTRA_IMAGE_FEATURES = " \
     debug-tweaks \
     tools-debug \
     eclipse-debug \
"

IMAGE_INSTALL_append = " \
     tcf-agent \
     openssh-sftp-server \
        qtbase-fonts \
         qtbase-plugins \
         qtbase-tools \
         qtbase-examples \
         qtdeclarative \
         qtdeclarative-plugins \
         qtdeclarative-tools \
         qtdeclarative-examples \
         qtdeclarative-qmlplugins \
         qtquickcontrols-qmlplugins \
"

# Use systemd instead of SysV init
DISTRO_FEATURES_append = " systemd"
VIRTUAL-RUNTIME_init_manager = "systemd"
DISTRO_FEATURES_BACKFILL_CONSIDERED = "sysvinit"
VIRTUAL-RUNTIME_initscripts = ""
IMX_DEFAULT_DISTRO_FEATURES_append = " systemd"


I think, that problem could be in configuring -opengl es2 in qtbase 
recipe. But when I set it manually I get errors doing bitbake 
fsl-image-qt5....



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