[gdal-dev] Ogr and Dwg via Teigha (in C#)

[Noon Silk]

Hi Tamas,

 Thanks; I think you're right. So I started to follow the advice on
building the plugins here:
<http://trac.osgeo.org/gdal/wiki/BuildingOnWindows> only to find that
the build appears to be referencing some libs that don't come with the
particular Teigha download that I have.

 It's referencing "TD_FT.lib", "Jpeg.lib", and probably less
importantly, "OdBagFiler.lib" (the last one seemingly being related to
one of the Teigha example projects).

 I'm a bit out of luck, here, because when I just comment these lines
including these libs out (in the hope that they aren't included
because they aren't needed) it doesn't compile (possibly related to
the Jpeg stuff).


On Sun, Nov 4, 2012 at 8:31 AM, Tamas Szekeres <szekerest at gmail.com> wrote:
> Noon,
>
> As far as I see the DWG driver is compiled as a plugin so you should either
> place it into a /gdalplugins subdirectory from where your application is
> running, or set the location of this dll in the GDAL_DRIVER_PATH environment
> variable.
> Also make sure the location of the dll-s from the dependent libs are also
> added in PATH.
>
> Best regards,
>
> Tamas
>
>
>
>
> 2012/11/3 Noon Silk <noonslists+gdal at gmail.com>
>>
>> Hi,
>>
>>  So, further to this, I've not had much luck with my previous
>> approach. I'm going to now try this method; but I kind of want to
>> understand why what I tried didn't work.
>>
>>  What I mean by "Didn't work" is that my requests to open DWG files,
>> or just grab an instance of the DWG driver, didn't work.
>>
>>  I ask for an instance like so (in C#):
>>
>>  Ogr.RegisterAll();
>>  Driver d = Ogr.GetDriverByName("DWG");
>>
>>  "d" comes back as null. So, I expected it to return something given
>> that I thought I was correctly "enablding" the DWG library. But, I
>> also checked to see if the number of available drivers changed, after
>> me doing what I would've expected to result in the enablding. Sadly,
>> it didn't. So I can only assume that I didn't enanble it correctly.
>>
>>  So, my process for enabling the DWG driver was basically to allow it
>> to be compiled as part of the "gdal\ogr\ogrsf_frmts\makefile.vc" (by
>> adding in the directory and the obj files). I also set up the required
>> Teigha libraries by uncommenting and correctly setting the particular
>> bits of nmake.opt.
>>
>>  Then the only other change I made was to generate the SWIG bindings.
>>
>>  Is this the correct way to enable the dwg bindings? Is there
>> something obvious I've missed? Would linking this other -dev build
>> script with the particular source work better?
>>
>> Thanks,
>> --
>> Noon
>>
>>
>>
>>
>> On Fri, Nov 2, 2012 at 9:30 AM, Noon Silk <noonslists+gdal at gmail.com>
>> wrote:
>> > On Mon, Oct 29, 2012 at 11:34 PM, Tamas Szekeres <szekerest at gmail.com>
>> > wrote:
>> >> You might also take a look at the -dev packages at
>> >> http://www.gisinternals.com/sdk/
>> >> The compilation is controlled by a single makefile, so you can use:
>> >>
>> >> nmake gdal
>> >> nmake gdal-csharp
>> >
>> > Thanks; I happened to grab the "MSVC2005 (Win64) -development", which
>> > doesn't have that ..., I'll give this a go.
>> >
>> >
>> >> to achieve the desired result.
>> >>
>> >> Best regards,
>> >>
>> >> Tamas
>> >
>> > --
>> > Noon
>
>