How to integrate Opengl ES to Navit

[anantha-vidhya]

Is there any way to modify navit source code so it uses opengl es not opengl since our embedded os supports opengl es package. I suspecting because of this the library is not linking properly which is showing in cmake step .

Thanks & Regards A.N.V.Lavanya

[jkoan]

There is the graphics/egl plugin which should be compatible with OpenGL ES. If you would need to implement a graphics Plugin yourself here is the doc: https://wiki.navit-project.org/index.php/Graphic_driver_development Obviusly you need to configure navit to use graphics=egl which is described here: https://wiki.navit-project.org/index.php/Configuration/Display_Options#Graphics_Driver

[anantha-vidhya]

Thank you jkoan. it is quiet interesting i will sure refer this and will get back to you.

[anantha-vidhya]

But here in 1st point in link you shared it is mentioned that in navit.xml file we need to register the graphical driver. but navit.xml file itself is not there in source directory . it is created under build directory for me while doing for desktop but for arm board cmake itself failed. Then how we will proceed. I had navit.xml.python under /home/futura/Desktop/Projects/NAVIT-Malasia-Demo/navit/navit/binding/python is it same what you refering to in source code directory.

[jkoan]

but navit.xml file itself is not there in source directory . it is created under build directory for me while doing for desktop but for arm board cmake itself failed.

Yep this is right. It configures which plugins load wen navit is launched. The Python Binding has nothing to do with this. Probably you need to fix the Navit build first. For your arm board you can probably disable all failing components which are not related to the config you intent to use. This should be done automatically, but its not always working.

[anantha-vidhya]

Hi Jkoan,

When i am trying to do cmake step in build folder navit.xml file itself is not created with my cross-compile environment.

Thanks & Regards A.N.V.Lavanya

[jkoan]

Could you please provide the console output of everything you did to try to build navit? Please upload at gist.github.com and share the link. At the bare minimum I need the full cmake output and the build output (normally make)

[anantha-vidhya]

https://gist.github.com/anantha-vidhya/f2e55c67c1a04ed779e51a2694ab8372

[anantha-vidhya]

1.I actually fount the graphics files are the one which is responsible for graphics rendering on screen.So i am trying to replace all the functions with compatible opengl es functions so that graphics file will get modified to opengl es compatible. Then i will change navit.c file so that application files will change according to library compatible All the way i am thinking to proceed is it correct way? Correct me if my attempt of doing is wrong. Thanks & Regards A.N.V.Lavanya

[anantha-vidhya]

Please some one respond to me. Any sort of help is appreciated.

[jkoan]

https://gist.github.com/anantha-vidhya/f2e55c67c1a04ed779e51a2694ab8372

Please try to disable the modules which are failing. cmake -L gives you all the names for that. For the currently failing module its -Dgraphics/qt_qpainter=FALSE

1.I actually fount the graphics files are the one which is responsible for graphics rendering on screen.So i am trying to replace all the functions with compatible opengl es functions so that graphics file will get modified to opengl es compatible. Then i will change navit.c file so that application files will change according to library compatible All the way i am thinking to proceed is it correct way? Correct me if my attempt of doing is wrong. Thanks & Regards A.N.V.Lavanya

I don't know if you already understood navits modular build approach. under navit/graphics you see multiple plugins which can be build. Some of which are more desktop oriented, others that work very well on embedded. So you need to look into which specific one you wane use. As you said you need OpenGL ES so i would amuse that the "opengl" Plugin would be feasible or the egl plugin. I don't currently know if one of them uses functions which are unsupported on opengl es. But what i can say is that you only need one graphics plugin.

Please some one respond to me. Any sort of help is appreciated.

I want to stress that you don't paying anyone to do work for you. So please don't stress someone to take time for you in their free time. And try to proactively provide all the information you can like how to reproduce your exact problem. For example, i think you are using a build open source build environment. Why don't you provide every step necessary to reproduce you problem?

[anantha-vidhya]

I want to stress that you don't paying anyone to do work for you. So please don't stress someone to take time for you in their free time.

Sorry for framing out sentence in such way but i mean it as request to gain the knowledge. I know that i am not paying for you anything,So please apology me if i mean in such a way. So far for all the help Thanking you.

And try to proactively provide all the information you can like how to reproduce your exact problem. For example, i think you are using a build open source build environment. Why don't you provide every step necessary to reproduce you problem? Yeah Sure.

1. Firstly i downloaded the ti-processor-sdk-linux-am437x-evm-04.02.00.09-Linux-x86-Install.bin from the below link, https://www.ti.com/tool/download/PROCESSOR-SDK-LINUX-AM437X/04.02.00.09

2. I did extracted the file by running ./ti-processor-sdk-linux-am437x-evm-04.02.00.09-Linux-x86-Install.bin

3. It is the SDK folder with all the tool chain environment and all necessary file system things containing.

4. Sourced the Cross-compiling tool chain with the following step. cd /home//ti-processor-sdk-linux-am437x-evm-04.02.00.09/linux-devkit/ source environment-setup

5. The terminal prompt will change as [linux-devkit]:~>

6. Then mkdir navit-build-arm cd /navit-build-arm cmake ../navit make

7. getting errors at make step.

8. Before step 4 i did one more step i.e i builded some SDL-Image library, ttf-liberation, etc dependencies libraries using bit bake method dedicated to this SDK and those packages i copied to the linux-devkit/sysroots/armv7ahf-neon-linux-gnueabi as well as linux-devkit/sysroots/x86_64-arago-linux

9. After that i in cmake step we can see SDL found.. kind of messages but for opengl i couldn't able to build the proper package so i couldn't able to copy the builded package.

10. How i builded the packages for arm using bitbake method.

    • sudo dpkg-reconfigure dash

    Select "No" when prompted

    • wget https://releases.linaro.org/components/toolchain/binaries/6.2-2016.11/arm-linux-gnueabihf/gcc-linaro-6.2.1-2016.11-x86_64_arm-linux-gnueabihf.tar.xz
    • tar -Jxvf gcc-linaro-6.2.1-2016.11-x86_64_arm-linux-gnueabihf.tar.xz -C $HOME
    • git clone git://arago-project.org/git/projects/oe-layersetup.git tisdk
    • cd tisdk
    • ./oe-layertool-setup.sh -f configs/processor-sdk/processor-sdk-04.02.00.09-config.txt
    • cd build
    • . conf/setenv
    • export PATH=$HOME/gcc-linaro-6.2.1-2016.11-x86_64_arm-linux-gnueabihf/bin:$PATH
    • MACHINE=am437x-evm bitbake <pkg_name>
    • So by this method we will be builded pkg folder under /tisdk/build/arago-tmp-external-linaro-toolchain/work/armv7ahf-neon-linux-gnueabi/pkg_name

11. Under these folders choose deploy-ipks folder for target and image folder for host(to copy library .so files to linux-devkit as mentioned in step8)

Hope this all the information will help you in exactly describing my issue.Else if you require more information, i am ready to give.

Thanks & Regards A.N.V.Lavanya