Re: [Swig-user] Pointers to classes in C#

[William S F. <ws...@fu...>]

On 17/02/11 01:12, Liron Kopinsky wrote:
> Hi All,
>
> I’m totally new to swig and have spent the last few days digging through
> the documentation trying to figure out how to convert a c++ library I’m
> working with to call into it in C++.
>
> I’m trying to get rid of all the SWIGTYPE_p_XXXX classes to actually be
> able to use all the classes I need, but I’m continuing to bump into
> walls and I was wondering if someone could sort of walk me through what
> I’m doing wrong.
>
> I have the following function types which I’ve been working on.
>
> virtualvoid SetValue(const unsigned char * data, int length, int width,
> int height, int depth) = 0;
>
> In this case, I have successfully managed to get the c# function to pass
> in a byte[] by using
>
> %include "arrays_csharp.i"
>
> %apply unsigned char INOUT[] { unsigned char* data };
>
> virtualvoid GetValue(unsigned char * data, int & width, int & height,
> int & depth) const = 0;
>
> In this case, I have successfully managed to get the c# function to pass
> in a byte[] by using %include "arrays_csharp.i"
>
> I have also managed to get the int & width etc. to be out int width by
> using
>
> %include "typemaps.i"
>
> %apply int & OUTPUT { int & };
>
> virtualvoid SetFailureThreshold(TReal value) = 0;
>
> In this case TReal is just a typedef for either double or float,
> depending on a #define in one of the .h files. I tried the following,
> but it doesn’t seem to work:
>
> %apply float & OUTPUT { TReal & };
>
> virtualIImage* CreateImage() = 0;
>
> virtualbool AddImage(IImage * image) = 0;
>
> In these case I am trying to get a handle to an actual IImage class so
> that I can call its methods and then pass it to AddImage, but everything
> I have tried has resulted in a SWIGTYPE_p_IImage on both methods.
>
Has SWIG parsed the definition of IImage? If not it will be treated like 
an opaque C struct and hence the typewrapper class.

William