[Insight-developers] help with wrapping wrap_itkWatershedImageFilter

[Brad King]

Charl P. Botha wrote:
> Brad King wrote:
> 
>> select1st and select2nd are not actually part of the C++ standard, 
>> these symbols were not included when I made a sweep through the 
>> standard to list all symbols.  I've committed a fix to the header 
>> wrapper for functional that includes these symbols.  The fix is on the 
>> main tree and in the ITK 1.6 branch of CableSwig.
> 
> 
> Thankyou very much Brad...
> 
> I have (at least) one more question: the wrapping now actually builds 
> successfully.  However, the wrapped itkWaterShedImageFilter has no 
> GetOutput() method:
> 
> In [4]: a = itk.itkWatershedImageFilterF3_New()
> In [5]: GetOutStar = [m for m in dir(a) if m.startswith('GetOut')]
> In [6]: print GetOutStar
> ['GetOutputs']
> 
> I checked the generated XML, it includes a representation of GetOutput. 
>  Here is an example:
> 
> <Method id="_1292" name="GetOutput" returns="_509" context="_480" 
> mangled="_ZN3itk11ImageSourceINS_5ImageImLj3EEEE9GetOutputEv" 
> location="f34:62" file="f34" line="62" extern="1"/>
> 
> The "returns" tag has the same value as GetBasicSegmentation(), which 
> does work.  "context" has the same value as for GetNameOfClass() (for 
> example) which is also wrapped successfully.
> 
> The generated itkWatershedImageFilterPython.cxx has no declaration or 
> invocation of GetOutput() anywhere.
> 
> Do you have any idea why the wrapper is not wrapping that?  At first I 
> thought it was the use of GetImageDimension in the class declaration, 
> but when I hardcoded that, GetOutput() was still not wrapped.
> 
> I've just started with this... I've added wrappings for 
> itkImage<unsigned long,*> as well (for the labeled image output) and I 
> expect that at least the segmenttree will have to be wrapped.

The GetOutput method you see in the XML is in the ImageSource superclass 
of the watershed filter.  You need to configure the wrapper for that as 
well.

-Brad