Re: [isugamedev-devel] imagelib

[Chad A. <ae...@ae...>]

> i would tend to agree. most uses of the image loading library would
> probably be through C++. thus we'd want to make sure that the library was
> well design from the standpoint of using it through C++.
> 
> however, i also agree that the image lib should probably be
> distributed/used as a DLL which i believe is why chad wants a C api.
> regardless we will need a C api to access the code in the library, but we
> could do it as just one simple call to get a class and write the
> application code using interfaces ... ie:
> 
> // assume getImageMgr is in the DLL and is really being called using a
> // function pointer obtained through GetProcAddr(..)
> ImageManager* mgr = getImageMgr();
> Image myImg;
> mgr->load( "myimage.pcx", img );

Ack.  You can't do this because an ABI doesn't just specify name mangling
semantics.  The vtable in different compilers has different layouts.  There are
also issues like exception handling, C++ object calling convention (do all Win32
compilers pass |this| in |eax|?).

(sorry I'm so backed up on these e-mails, I've been pretty busy tonight)