Re: [Rubycocoa-talk] NSBitmapImageRep#bitmapData

[Jonathan P. <jp...@dc...>]

On 15 Jul 2005, at 21:24, Ralph Brorsen wrote:

> If at all possible I would prefer not to link my C++ stuff against  
> Ruby in order to keep it clean. It is a library meant for stand- 
> alone distribution. I now handle the conversion in the SWIG layer:
>
> // Convert bool from Ruby --> C with type check
> %typemap(in) BitmapPointer {
>     id ocobj = (id) NUM2UINT( rb_funcall($input, rb_intern 
> ("__ocid__"), 0) );
>     $1 = [(NSBitmapImageRep*) ocobj bitmapData];
> }

Did you try linking against RubyCocoa to make use of its dedicated  
function for getting at the __ocid__ of a Ruby object? That way will  
rely less on the internal workings of RubyCocoa.

> Three more things were needed to make it work.
> 1. Testinterface::Test(bitmapRep.bitmapData())   ->     
> Testinterface::Test(bitmapRep)    (duh)
> 2. #include <AppKit/NSBitmapImageRep.h>    (in the SWIG .i file)
> 3. You're now mixing Objective-C and C/C++ (aptly termed Objective-C 
> ++), and the compiler needs to be made aware of this. This is done  
> by changing the extension of the *_wrap.cxx file to .mm, ie.  
> *_wrap.mm. Update your makefile.

Thanks for posting back with your results. Useful recipes.

Jonathan