Open GL QT embedded on imx6 with Yocto dora

[mariorodriguez]

Hello Community!

So far I have being able to "bake" a build using Yocto dora and use the Vivante examples :smileygrin:.

The image that I built was qte-in-use-image and I append the vivante examples. Everything seems to work even though I had to disable X11 manually on the local.conf because it seems like the vivante library can be used for X11 or with framebuffer but not with both enabled.

DISTRO_FEATURES_remove = "x11 wayland"

See this post for more info:Google Groups

I am using the sabre lite board from boundary devices.

in the qte-in-use-image there are some QT examples. Unfortunately the ones for OpenGL didn't work .

When I try to run the helloOpenGL example on /usr/bin/qtopia/examples/opengl/hellogl_es2 I get the following message:

(I run it by giving it the -qws option)

Unable to load library icui18n "Cannot load library icui18n: (icui18n: cannot open shared object file: No such file or directory)"

pwm_config: pwm freq = 32786, clk_select=2 clock_rate=22000000

pwm_config: pwm freq = 20000, clk_select=2 clock_rate=22000000

And I see the QT widget with menus and everything but the middle of the screen is pitch black. The same happens with the texture example. I see the widget, but there where the textures should come I can only see black squares.

Do I need to cross-compile them with a special option or how does that work? I would appreciate any hint.

Does anyone have succedded running the hellogl_es2 example for the imx6 on dora?

Regards,

Mario

Regards!

Mario

[daiane_angolini]

"because it seems like the vivante library can be used for X11 or with framebuffer but not with both enabled."

Yes, or you have a system with X11, or you have a system with framebuffer. And I would say it´s not a "vivante thing" :smileywink:

Wayland + X11 is only possible because there is a version of Wayland to be run *over* X11

Otherwise, backends are incompatible each other.

icui18n library is not related with GPU stack. Do you know this lib?

Are you using QT4.8 or QT5?

[mariorodriguez]

Hello Daiane,

thanks for responding :smileygrin: I am using QT4.8

Yes I agree that it is not a vivante thing but it cost some time to figure it out.

I don't know the icui18n library. I think it has to do with QT.

But I found something quite interesting... I created a meta-toolchain-qte. (with bitbake)

(Which by the way I can only compile if I add again X11 and wayland)

I see that on the following folder:

/opt/qte_poky/1.5.1/sysroots/cortexa9hf-vfp-neon-poky-linux-gnueabi/usr/include/qtopia

There is no QtOpenGL folder....

I wanted to crosscompile again on my machine the hellogl_es2 example and I found this. I think OpenGL was not configured correctly (the OpenGL flag was not given) I am trying to find out where does this happen. I inspected the meta-toolchain-qte.bb and that lead me to meta-toolchain-qt.inc... I would expect that the recipe from /opt/yocto-freescale/sources/meta-fsl-arm/recipes-qt/qt4/qt4-embedded_4.8.5.bbappend should be somewhere on this file included but I cannot find it.

What I am missing? Or I am looking at the wrong place?

[daiane_angolini]

I´m not sure, but I think you´ve facing those problems because you´ve been using the same build folder to build different DISTRO_FEATURES images.

When you change DISTRO_FEATURES in your local.conf, do you remove tmp folder?

[mariorodriguez]

Hi Daiane,

I did not delete my tmp folder. But then I manually modified the ./poky/meta/recipes-qt/packagegroups/packagegroup-qt-toolchain-target.inc file and I manually added the OpenGL library entry there and I got the headers on my sdk :smileygrin:. Do I really need to delete my tmp folder everytime I touch local.conf?

And does OpenGL + QT without X11 and wayland runs on the mx6 board? Which examples do yo recommend to test? What would be better to use QT4 or QT5?

Thanks!

[OtavioSalvador]

Hello Mario,

Not every time but when you change DISTRO_FEATURES you must to start over.

Please do that and report back.

[mariorodriguez]

Hi Otavio,

I buid meta-toolchain-qte again, delete the tmp folder. I removed my fix from packagegroup-qt-toolchain-target.inc and... there is no QtOpenGL folder... I think the Qt is not configured with the opengl es2 flag. I also see that the qmake.conf has no trace of opengl....

/opt/poky/1.5.1/sysroots/cortexa9hf-vfp-neon-poky-linux-gnueabi/usr/share/qtopia/mkspecs/linux-g++/qmake.conf

I wanted to crosscompile a very simple example and the GL constants and functions are not found. i.e. GL_POLYGON, glMatrixMode and so on...

I will have to download qt and configure it. But it would be nice if I know which flags do I need to set up...

And OpenGL + QT is really supported (using framebuffer only)? The GPU is really used?

Regards,

Mario

[daiane_angolini]

hummmmmmmmmmmmmmmmmmmmmmmmmmm

Which board are you using?

[daiane_angolini]

Let´s start over, OK?

If you cannot see *any* GPU lib inside your rootfs, let´s focus first on this.

Please, double check:

1) your machine name

2) your bblayer.conf

3) youc local.conf

4) bitbake -e | grep DISTRO_FEATURES

Send me the logs and I will try to figure out what would be the problem

[mariorodriguez]

No no no no, I can see the open GL libraries. I mean they are there.

Sorry my mistake I forgot to add the

QT += opengl

to my *.pro file.

And now I can see them.

But anyway there is definetly something funny with the sdk.

My board is a sabre lite from boundary devices. opengl is definetly in DISTRO_FEATURES

[daiane_angolini]

:smileygrin:

Ok, so know I´m confused

What is funny with your sdk? And, when you say SDK, you mean SDK, the toolchain?