[Insight-developers] Split ImageFileReader/Writer Factory And Factoryless- crazy idea 2

[Bill Lorensen]

Folks,

Following up again on today's t-con...


Rather than generate a .cxx file at cmake tiime, why not add #idef's
to the current ImageIOFactory.cxx file.

#ifdef ITKIO_USE_PNG
#include "itkPNGImageIOFactory.h"
      ObjectFactoryBase::RegisterFactory( PNGImageIOFactory::New() );
#endif

The CMakeLists.txt would default each ITKIO_ to be ON. The ifdef'f
might be useful elsewhere. I realize that this dds to cmake variable
bloat, but
I think the cmake gui lets you turn groups on/off, so the user would
turn on the ITKIO group and set the IO's she wants.

Bill