[FWTools] Re: GDALOverviews.cs gdal 1.5

[Tamas Szekeres]

I've added a ticket for this issue: http://trac.osgeo.org/gdal/ticket/2122

And applied the fix in SVN trunk and branch-1-5

The GDALProgressFunc callback is now implemented for the C# bindings,
and the GDALOverviews.cs shows how to use this new fuctionality.

The following signatures are now supported for the BuildOverViews function:

- public int BuildOverviews( string resampling, int[] overviewlist)

- public int BuildOverviews( string resampling, int[] overviewlist,
Gdal.GDALProgressFuncDelegate callback, string callback_data)

- public int BuildOverviews(string resampling, int overviewlist,
IntPtr pOverviews, Gdal.GDALProgressFuncDelegate callback, string
callback_data)

(The callback_data is treated as string to keep the marshaling code as
simple as possible.)


Best regards,

Tamas



2007/12/29, Tamas Szekeres <szekerest at gmail.com>:
> Hi,
>
> It seems the recently added callback support have broken some of the
> existing functions at the SWIG C# interface. In order to make this
> callback stuff work some typemaps should also be added that I've
> originally planned to implement later.
> But as looking into the code since the problem is critical and it
> seems quite an easy to implement this, I'll commit a fix in the SVN
> trunk and the branch 5.0 in a couple of hours.
> You can submit a ticket for this problem till then.
>
> http://trac.osgeo.org/gdal/newticket
>
> Best regards,
>
> Tamas
>
>
>
>
> 2007/12/29, luizmottanet at hotmail.com <luizmottanet at hotmail.com>:
> > I run the example for C#:
> > ..\FWTools2.0.4\csharp\apps\GDALOverviews.cs
> >
> > The method Dataset.BuildOverviews(string resampling, int[] overviewlist)
> > make exception: "Attempt to dereference null GDALProgressFunc".
> > In the FWTools 2.0.0. this method run perfect.
> >
> > I read source files where have the exception menssage.
> >
> > I believe the solution for call in:
> > CSharp_Dataset_BuildOverviews and CSharp_Driver_CreateCopy
> > where use the pointer to GDALProgressFunc is to not test null argument pass in calls
> >
> > File:
> > ..\gdal-1.5.0\swig\csharp\gdal\gdal_wrap.cpp
> >
> > Line/Methods:
> > a) 2483/SWIGEXPORT void * SWIGSTDCALL CSharp_Driver_CreateCopy(void * jarg1, char * jarg2, void * jarg3, int jarg4, void * jarg5, void * jarg6, void * jarg7)
> >
> > in line 2501 remove the test
> > if (!argp6) ...
> >
> > b) 4670/SWIGEXPORT int SWIGSTDCALL CSharp_Dataset_BuildOverviews(void * jarg1, char * jarg2, int jarg3, void * jarg4, void * jarg5, void * jarg6)
> >
> > in line 4686 remove test
> > if (!argp5)
> >
> >
> > The null values are test in the other call, how
> > ..\gdal-1.5.0\gcore\gdaldataset.cpp
> > 1122/CPLErr GDALDataset::BuildOverviews(...
> >
> > in line 1142 have test for null pointer to argument GDALProgressFunc.
> >
> > I beginner  in use GDAL (one month) and C# (one year), is difficult for me compile the source, the makefile use very files, and my target is only one.
> >
> > In the other moment, next year, i would like use the ProgressFunc, where, change the class
> > SWIGTYPE_p_GDALProgressFunc.
> >
> > If you don´t work in this topic, see you next year.
> >
> > I don´t like leave work for next year, but, this year is end, them
> >
> > Happy new year !
> >
> > Thank´s for read the menssage.
> > Luiz Motta
> >
> >
> >
> >
> >
> >
>