OpenCPN on Raspberry Pi2

[seandepagnier]

So you were not compiling opencpn from source? No wonder it isn't working.

[Andreas29]

Originally Posted by boat_alexandra

So you were not compiling opencpn from source? No wonder it isn't working.

Hi,

no, didn´t compile sorry

I used the packages from the ppa (ppa:nohal/opencpn) and installed them. This looked to be the best way for a newbie like me.

Ok, so I understand that I have to compile it.
Can you please tell me the right path to the source?
Where I can find the right source for compiling o for the pi with the right grafik acceleration?
Is it $ git clone git://github.com/OpenCPN/OpenCPN.git
like it is explained in the dev.-manual or is it another source?
Wich one?
The steps are the same as compiling e.g. the glshim right?

When I want to have some of the plugins how can I get them into o?
Install them with the ppa-packages or better to compile?

Thanks

Andreas

[Andreas29]

Hi,

sorry to ask, but I loose the clear view of sight.
I´ve read the threads for the new releases, the ones for the pi and so on and so on.

What is now the right source for building o for the raspi 2?

Thanks

Andreas

[NahanniV]

Originally Posted by Andreas29

Hi,

sorry to ask, but I loose the clear view of sight.
I´ve read the threads for the new releases, the ones for the pi and so on and so on.

What is now the right source for building o for the raspi 2?

Thanks

Andreas

You can build from the mainline source:
https://github.com/OpenCPN/OpenCPN

But it will not use the video acceleration on the Pi.

The latest changes that enable video acceleration have not been merged into the main branch of OpenCPN.

If you want it to work with video acceleration, You could try this branch:
https://github.com/seandepagnier/OpenCPN/tree/rpi_fixes

In either case follow the instructions for compiling with Linux:
Compiling - Linux | Official OpenCPN Homepage

Cheers,
JM.

[bdbcat]

@jon...

re .deb package for 4.1.1301:
http://www.cruisersforum.com/forums/...ml#post2008512

I would very much like for O4.2 to build on RPI2 noobs(jessie) without any tweaking required.

I tried to reproduce your build, no joy. Missing libdri2.so, etc...

What changes did you need to make this work?

Thanks
Dave

[jongough]

Dave,
All the changes I made are in the mainline as I submitted pulls for them. It was really a matter of catering for wxWidgets 2.8. There is no opengl capability in my builds and they do not use SVG icons.

I am trying to get a build working using SVG, but there appear to be some cairo/pango libraries that are needed and not found. I am trying to fix this up at the moment, but as the changes are needed in cmake and I am rather confused by cmake it is slow going.

Jon

[jongough]

Dave,
I have just managed to generate the latest OCPN and OD plugins using SVG on the PI. For OCPN I had to add four libraries in the CMakeLists.txt file. For me I added a new line after ${GTK_LIBRARIES} (line 688), the "pango" stuff . For some reason the CMAKE process is not adding these to the link.

    ${EXPAT_LIBRARIES}
        ${GTK_LIBRARIES}
        pangocairo-1.0 pangoft2-1.0 pangoxft-1.0 gdk_pixbuf-2.0
      )
    ENDIF(WIN32)

    SET(SRC_WXSVG

I have tried it and it does work quite nicely.

Now I don't know enough about CMAKE to fix this error properly so I am reluctant to push this up to be incorporated into OCPN. Can someone who does understand CMAKE look through and see why it is not being added. It appears to be in the GTK2 sections, but.....

Jon

[bdbcat]

@jon...

I modified CMakeLists.txt to find and add the needed SVG extra libraries for RPI2 build. Committed to github. A little bit of a hack, but works OK so far.

Testing more on RPI2 now....

Thanks
Dave

[NahanniV]

Originally Posted by bdbcat

@jon...

I modified CMakeLists.txt to find and add the needed SVG extra libraries for RPI2 build. Committed to github. A little bit of a hack, but works OK so far.

Testing more on RPI2 now....

Thanks
Dave

Are you planning to merge Sean's Rpi Fixes Pull Request ?

Or is that waiting till after a release ?

Cheers,
JM.

[bdbcat]

@JM...

Sean RPI fix patch will hold until after O4.2 releases.

Thanks
Dave

[bdbcat]

@jon...

I am having some trouble getting the current github to run properly with stock wx2.8 on RPI2. Stops on some X error, unless I start with opengl disabled. Debugger no help, crashes earlier.

Builds and runs fine with locally built wx3.02, though.





Could you post the output of

$ldd opencpn

here?

Thanks
Dave

[jongough]

Dave,
I can get it running but the charts do not show with opengl, I just get a white screen. If I play around I do get a crash in GetCanvasPixLL at line 2068 - ocpn_vp.skew = vp=>skew, but this may be due to the charts not rendering. I have attached the LDD as requested. Without opengl it works fine.

I have been running through remote desktop as I don't have enough screens to run it directly attached. I have just done a trial that way and opengl or not I get an X Window System error -

The error was 'BadMatch (invalid parameter attributes)'.
  (Details: serial 1074 error_code 8 request_code 67 minor_code 0)

Jon

[jongough]

Dave,
I have not got it working with OpenGL, but very slowly, between 1 & 4fps. I followed these instructions:
King Tide Sailing: How To Install OpenCPN on a Raspberry Pi

This also stopped the X crashes I was getting when using a real HDMI local screen.

Now that I know it works I may have a little play to see if there is a setting that is slowing it down.

Jon

[seandepagnier]

Jon,

What about using my rpi_fixes branch?

Sean

[jongough]

Sean,
Just tried it but it is not wxWidgets 2.8 valid. s52plib.cpp at line 547 gets an error. This line was introduced in pull b866038.

I am using vanilla Jessie with just the development capability so that I can compile the programs. I have been trying to get OCPN OpenGL to run, and have now managed it with a few config changes. Non-OpenGL works fine from the main repository.

I have a wxWidgets 2.8 Linux VirtualBox I do my testing with so that I can run a full debugger (I just cannot get the hang of gdb text mode for debugging). I will see if I can use this to get it working over the next few days.

Regards
Jon