Qt3D not working on PiB+

[sedlalu2]

Hello,
I have already asked this question on Qt forum but with no response so I have decided to make a repost here:

I've recently got my raspberry pi B+. I cross-compiled Qt5.8 library and everything seems to be working just fine except Qt3d (QML).

When I want to run an example of 3D (offical examples included in 5.8 libary) then no error is occured in terminal, but the required object is not here. For example when I want to run example "wireframe" then application is running without any error but all I can see is white screen. Then there are
examples like "simple-qml" which are causing segmentation fault (in fragment shader). This behaviour is really odd.

Can you help me solve this problem? I am trying to solve for almost a week. I really need to solve this problem now because this is part of my diploma thesis.

Configure options:

Code: Select all

-opengl es2 -optimized-qmake -no-pch -make libs -make tools -reduce-exports -sysroot /mnt/rasp -device linux-rasp-pi-g++ -device-option CROSS_COMPILE=/home/lukas/raspberry/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf- -prefix /usr/local/rasp -opensource -nomake examples -nomake tests -confirm-license -skip qtmultimedia -skip qtcharts -skip qtsensors -skip qtgamepad -skip qtmacextras -skip qtandroidextras -skip qtwayland

Raspberry is running Raspbian Lite - according to my diploma thesis is better to have system without X11.
Cross compilation made from Linux Mint 17.2 with gcc linaro tool (v4.9 compiler)

[topguy]

Can you show us the output of "ldd ./yourbinary", I'm interested to see which GLES libraries are used.
Also you could see if you get some debug by using "export QT_QPA_EGLFS_DEBUG=1" before running your program. ( ref: http://doc.qt.io/qt-5/embedded-linux.html )

[sedlalu2]

Output from my ldd ./wireframe is:

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/usr/lib/arm-linux-gnueabihf/libarmmem.so (0xb6fcf000)
	libQt53DExtras.so.5 => /usr/local/qt5pi/lib/libQt53DExtras.so.5 (0xb6f6d000)
	libQt53DQuickExtras.so.5 => /usr/local/qt5pi/lib/libQt53DQuickExtras.so.5 (0xb6f67000)
	libQt5Concurrent.so.5 => /usr/local/qt5pi/lib/libQt5Concurrent.so.5 (0xb6f62000)
	libQt53DRender.so.5 => /usr/local/qt5pi/lib/libQt53DRender.so.5 (0xb6db9000)
	libQt53DInput.so.5 => /usr/local/qt5pi/lib/libQt53DInput.so.5 (0xb6d46000)
	libQt53DLogic.so.5 => /usr/local/qt5pi/lib/libQt53DLogic.so.5 (0xb6d3b000)
	libQt53DQuick.so.5 => /usr/local/qt5pi/lib/libQt53DQuick.so.5 (0xb6d1c000)
	libQt53DCore.so.5 => /usr/local/qt5pi/lib/libQt53DCore.so.5 (0xb6cd5000)
	libQt5Gamepad.so.5 => /usr/local/qt5pi/lib/libQt5Gamepad.so.5 (0xb6cbd000)
	libQt5Quick.so.5 => /usr/local/qt5pi/lib/libQt5Quick.so.5 (0xb696d000)
	libQt5Gui.so.5 => /usr/local/qt5pi/lib/libQt5Gui.so.5 (0xb652c000)
	libQt5Qml.so.5 => /usr/local/qt5pi/lib/libQt5Qml.so.5 (0xb620a000)
	libQt5Network.so.5 => /usr/local/qt5pi/lib/libQt5Network.so.5 (0xb60a9000)
	libQt5Core.so.5 => /usr/local/qt5pi/lib/libQt5Core.so.5 (0xb5c0b000)
	libGLESv2.so => /opt/vc/lib/libGLESv2.so (0xb5be5000)
	libpthread.so.0 => /lib/arm-linux-gnueabihf/libpthread.so.0 (0xb5bbd000)
	libstdc++.so.6 => /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 (0xb5ae1000)
	libm.so.6 => /lib/arm-linux-gnueabihf/libm.so.6 (0xb5a66000)
	libgcc_s.so.1 => /lib/arm-linux-gnueabihf/libgcc_s.so.1 (0xb5a39000)
	libc.so.6 => /lib/arm-linux-gnueabihf/libc.so.6 (0xb58f7000)
	libpng12.so.0 => /lib/arm-linux-gnueabihf/libpng12.so.0 (0xb58c7000)
	libz.so.1 => /lib/arm-linux-gnueabihf/libz.so.1 (0xb58a0000)
	librt.so.1 => /lib/arm-linux-gnueabihf/librt.so.1 (0xb5888000)
	libicui18n.so.52 => /usr/lib/arm-linux-gnueabihf/libicui18n.so.52 (0xb56c8000)
	libicuuc.so.52 => /usr/lib/arm-linux-gnueabihf/libicuuc.so.52 (0xb557f000)
	libicudata.so.52 => /usr/lib/arm-linux-gnueabihf/libicudata.so.52 (0xb3f02000)
	libdl.so.2 => /lib/arm-linux-gnueabihf/libdl.so.2 (0xb3eef000)
	libgthread-2.0.so.0 => /usr/lib/arm-linux-gnueabihf/libgthread-2.0.so.0 (0xb3edd000)
	libglib-2.0.so.0 => /lib/arm-linux-gnueabihf/libglib-2.0.so.0 (0xb3dd9000)
	/lib/ld-linux-armhf.so.3 (0x7f5d4000)
	libEGL.so => /opt/vc/lib/libEGL.so (0xb3da0000)
	libbcm_host.so => /opt/vc/lib/libbcm_host.so (0xb3d7a000)
	libvchiq_arm.so => /opt/vc/lib/libvchiq_arm.so (0xb3d64000)
	libvcos.so => /opt/vc/lib/libvcos.so (0xb3d4a000)
	libpcre.so.3 => /lib/arm-linux-gnueabihf/libpcre.so.3 (0xb3cd6000)

and output from ./wireframe when debug log is enagled:

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Created context for format QSurfaceFormat(version 2.0, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, redBufferSize -1, greenBufferSize -1, blueBufferSize -1, alphaBufferSize -1, stencilBufferSize 8, samples 4, swapBehavior QSurfaceFormat::SwapBehavior(DefaultSwapBehavior), swapInterval 1, profile  QSurfaceFormat::OpenGLContextProfile(NoProfile)) with config:
	EGL_BUFFER_SIZE: 16
	EGL_ALPHA_SIZE: 0
	EGL_BLUE_SIZE: 5
	EGL_GREEN_SIZE: 6
	EGL_RED_SIZE: 5
	EGL_DEPTH_SIZE: 24
	EGL_STENCIL_SIZE: 8
	EGL_CONFIG_CAVEAT: 12344
	EGL_CONFIG_ID: 21
	EGL_LEVEL: 0
	EGL_MAX_PBUFFER_HEIGHT: 2048
	EGL_MAX_PBUFFER_PIXELS: 4194304
	EGL_MAX_PBUFFER_WIDTH: 2048
	EGL_NATIVE_RENDERABLE: 1
	EGL_NATIVE_VISUAL_ID: 107544
	EGL_NATIVE_VISUAL_TYPE: 12344
	EGL_SAMPLES: 4
	EGL_SAMPLE_BUFFERS: 1
	EGL_SURFACE_TYPE: 1639
	EGL_TRANSPARENT_TYPE: 12344
	EGL_TRANSPARENT_BLUE_VALUE: 0
	EGL_TRANSPARENT_GREEN_VALUE: 0
	EGL_TRANSPARENT_RED_VALUE: 0
	EGL_BIND_TO_TEXTURE_RGB: 0
	EGL_BIND_TO_TEXTURE_RGBA: 0
	EGL_MIN_SWAP_INTERVAL: 0
	EGL_MAX_SWAP_INTERVAL: 2147483647

[topguy]

It was the references to libraries is "/opt/vc" I was looking for in the "ldd" output, and that look correct to my eyes.

Someone else with detailed knowledge about OpenGLES might be able to see something in the debug output.

I dont know if the chances are greater if you move the thread to the OpenGLES subforum: viewforum.php?f=68
If you report your own thread a moderator can move it. but wait a few days to see if someone else has better answers.

Is Qt3D new in Qt5.8 ?

[sedlalu2]

Thank you for your answer.

I will wait few days and I will see.
Btw, I think Qt3D has been included in Qt since 5.7 release.