[gdal-dev] Google Summer of Code

Tanuj Kumar kmrtnjscnc at gmail.com
Mon Mar 21 13:37:00 PDT 2016 

Hello Dmitry,

Thank you for your feedback. I will look into all the files in libpng once
again.

About the python support - I think I found the problem, I guess that when I
was downloading the source, due to poor net at the time a few files didn't
get through. So now I'm downloading again, and I'll let you know if there
are any more issues.

Cheers
Tanuj

On Tue, Mar 22, 2016 at 1:33 AM, Dmitry Baryshnikov <bishop.dev at gmail.com>
wrote:

> Hi Tanuj,
>
> I compare current libpng folder and previous one:
> 1. You include a lot of files needed to build standalone library, but not
> need in GDAL sources tree (like configure, CMakeLists.txt, etc.).
> 2. The makefile.vc removed and it seems to me the windows build will fail
> in that case.
> 3. There was a libpng_gdal.patch file, are you sure that this file is not
> necessary?
> 4. You included several files need for libpng unit testing, but not needed
> by GDAL. According to GNUMakefile in png folder, it get all *.c files from
> libpng folder, so we need minimum set of *.c and *.h files there (but
> enough for VC building too).
>
> About python support - do you did sudo make install (Linux)? The only
> building is not enough to have python bindings work (there is a tick with
> PYTHONPATH, but not sure that it works.
>
> Best regards,
>     Dmitry
>
> 20.03.2016 10:15, Tanuj Kumar пишет:
>
> Hello Dmitry,
> Sorry for the long delay, my exams had the better of me, but now they're
> over :) .
> I have updated libpng 1.6.21 and i have created a pull request after
> removing files from original libpng 1.6.21 that I think would not be
> required as a library in GDAL.
> All test on travis have been passed, and you can see the pull request here
> : https://github.com/OSGeo/gdal/pull/108
>
> As for building on desktop, I configured with python, but the same issue
> of "ImportError: No module named osgeo persists". I am trying to understand
> why this is happening, and am working out how to get rid of this problem by
> reading GDAL wiki.
>
> Cheers
> Tanuj
>
> On Tue, Mar 15, 2016 at 1:24 AM, Dmitry Baryshnikov <bishop.dev at gmail.com>
> wrote:
>
>> Hi Tanuj,
>>
>> The error: ImportError: No module named osgeo
>> is because you build gdal without python support (you need python with
>> developers headers).
>> On Linux Linux this is done via such command:
>> ./configure --with-python ... <other config options>
>>
>> On Windows it depends how you build. On Windows I launch separate tests
>> successfully but never try the whole tests (run_all.py).
>>
>> Best regards,
>>     Dmitry
>>
>> 14.03.2016 19:11, Tanuj Kumar пишет:
>>
>> Hello Dmitry,
>> I was reading up on the gdalautotest wiki(
>> <http://trac.osgeo.org/gdal/wiki/TestingNotes>
>> http://trac.osgeo.org/gdal/wiki/TestingNotes), and it says, "After
>> building with either the old or new generation python bindings, and
>> installing them (or adding them to your path from the build tree)..."
>>
>> I could not understand what that means. I guess this is important because
>> when I tried the commands given on that page, I got the following error :
>>
>> File "./run_all.py", line 37, in <module>
>> import gdaltest
>> File"pymod/gdaltest.py", line 37, in <module>
>> from osgeo import gdal
>> ImportError: No module named osgeo
>>
>>
>> Now, as far as I could understand, it is importing a file called
>> "gdal.py" from a folder called osgeo. I searched for it, and got its path
>> as "gdal/swig/python/osgeo, whereas the autotest folder is separate.
>> So my guess is I have to somehow specify the path of "gdal.py"
>>
>> Could you or anyone please guide me on how to proceed with this?
>>
>> Thanks
>> Tanuj
>>
>> On Sat, Mar 12, 2016 at 11:00 PM, Tanuj Kumar < <kmrtnjscnc at gmail.com>
>> kmrtnjscnc at gmail.com> wrote:
>>
>>> Alright, thank you very much, I'll get to work on it!
>>>
>>> On Sat, Mar 12, 2016 at 10:47 PM, Dmitry Baryshnikov <
>>> <bishop.dev at gmail.com>bishop.dev at gmail.com> wrote:
>>>
>>>> Hi Tanuj,
>>>>
>>>> I wrote a big letter to the list. There is some answers there. Also I
>>>> add comments below.
>>>>
>>>> Best regards,
>>>>     Dmitry
>>>>
>>>> 12.03.2016 10:36, Tanuj Kumar пишет:
>>>>
>>>> Sorry for replying so late, got caught up in an exam :)
>>>>
>>>> I replaced libpng folder of gdal (frmts/png/libpng) with libpng 1.6.21.
>>>> And then used ./configure and make install on this test version of gdal,
>>>> which installed successfully. I used gdalinfo on a png file provided with
>>>> the libpng 1.6.21 source, to check if it was OK, and it successfully gave
>>>> the png file details.
>>>>
>>>> Is that enough to check the build on the computer?
>>>>
>>>> No, the autotests must be passed.
>>>>
>>>>
>>>> I have also tested the gdal library with libpng 1.6.21 on Travis, and
>>>> the build succeeded.
>>>> <https://travis-ci.org/Raeburn1687/gdal/builds/115487530>
>>>> https://travis-ci.org/Raeburn1687/gdal/builds/115487530
>>>>
>>>> Would all that be enough to check whether the update was succesful?
>>>>
>>>> I expected that travis from main gdal repo checked your PR.
>>>>
>>>>
>>>> PS - Although I have copied the files from libpng 1.6.21 source to the
>>>> gdal libpng folder, how would I know if any of those files are not required
>>>> for gdal?
>>>>
>>>> You need to see the previous version. Some files not needed (i.e.
>>>> configures and so on, which already comes from gdal, but legal notice must
>>>> be present (license, autors, etc.) ). Don't hesitate to ask in list.
>>>>
>>>>
>>>> Thank you
>>>>
>>>> Tanuj
>>>>
>>>> On Thu, Mar 10, 2016 at 2:07 PM, Dmitry Baryshnikov <
>>>> <bishop.dev at gmail.com>bishop.dev at gmail.com> wrote:
>>>>
>>>>> Hi Tanuj,
>>>>> 09.03.2016 13:17, Tanuj Kumar пишет:
>>>>>
>>>>> Yes, I have looked at the ideas list, and I am currently reading up on
>>>>> idea no. 16, which is, implementing support for the proposed standard for
>>>>> incrementally parseable GeoJSON data.
>>>>>
>>>>> Also, I was thinking that maybe I could work on ticket no 6294,
>>>>> <https://trac.osgeo.org/gdal/ticket/6294>
>>>>> https://trac.osgeo.org/gdal/ticket/6294
>>>>> after I've studied about the GSoC idea, which is not really a bug, but
>>>>> an enhancement. But if there are any other tickets that you or anyone else
>>>>> would like to recommend me to work on, I'd love to see them too!
>>>>>
>>>>> I think this rather arguing ticket as the bool is not exist in plain
>>>>> C, and duplication functions seems to me not good idea.
>>>>> I think this ticket <https://trac.osgeo.org/gdal/ticket/6185>
>>>>> https://trac.osgeo.org/gdal/ticket/6185 is good for: 1. building
>>>>> GDAL, 2. Testing via TraviC on GitHub. By the way the libpng version is
>>>>> 1.6.21 or maybe higher.
>>>>>
>>>>> Anyhow, you have to try to build gdal and test it with autotests from
>>>>> appropriate folder.
>>>>>
>>>>>
>>>>> Now, about the GSoC idea, do I need to know JSON( or GeoJSON, for that
>>>>> matter) to work on it? I only ask because the idea lists C/C++ as the
>>>>> required skills, but I feel that maybe this work would involve knowing JSON
>>>>> too...
>>>>>
>>>>> Yes, certainly. But JSON are very simple. Also GeoJSON spec. can be
>>>>> found here <http://geojson.org/>http://geojson.org/Thanks and
>>>>> regards,
>>>>>
>>>>>
>>>>> Tanuj
>>>>>
>>>>>
>>>>> On Wed, Mar 9, 2016 at 2:58 PM, Dmitry Baryshnikov <
>>>>> <bishop.dev at gmail.com>bishop.dev at gmail.com> wrote:
>>>>>
>>>>>> Hi, Tanuj
>>>>>>
>>>>>> I'll look for opened tickets for you, or maybe others can recommend
>>>>>> some for you.
>>>>>>
>>>>>> By the way, do you see the idea list (
>>>>>> <https://trac.osgeo.org/gdal/wiki/SummerOfCode#a2016IdeasList>
>>>>>> https://trac.osgeo.org/gdal/wiki/SummerOfCode#a2016IdeasList)?
>>>>>> The ideas are not ranked yet - the numbers in the list - are only in
>>>>>> order.
>>>>>> This is a task for us to rank the ideas.
>>>>>> But, have you some preferable idea (or ideas) for GSoC from this list
>>>>>> or maybe you have got own?
>>>>>>
>>>>>> Best regards,
>>>>>>     Dmitry
>>>>>>
>>>>>> 04.03.2016 16:11, Tanuj Kumar пишет:
>>>>>>
>>>>>> Hello,
>>>>>> I am interested in applying for GSoC this year. Currently, I am
>>>>>> reading up on the GDAL Summer of Code ideas list. I know C++ and C, and I
>>>>>> have some experience on working on linux.
>>>>>> Could the mentors please recommend a bug for me to work on, I'd
>>>>>> really love to start off as soon as possible!
>>>>>>
>>>>>> Thank you,
>>>>>>
>>>>>> Tanuj Kumar
>>>>>> Birla institute of Technology and Science
>>>>>> Pilani, Rajasthan,
>>>>>> India
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> gdal-dev mailing listgdal-dev at lists.osgeo.orghttp://lists.osgeo.org/mailman/listinfo/gdal-dev
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> gdal-dev mailing list
>>>>>> <gdal-dev at lists.osgeo.org>gdal-dev at lists.osgeo.org
>>>>>> <http://lists.osgeo.org/mailman/listinfo/gdal-dev>
>>>>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev
>>>>>>
>>>>>
>>>>>
>>>>> Best regards,
>>>>>     Dmitry
>>>>>
>>>>>
>>>>
>>>>
>>>
>>
>>
>
>
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