[PATCH 4/5] d2d1: Add the ID2D1Bitmap interface.

[Jacek Caban]

On 05/14/14 10:05, Henri Verbeet wrote:
> The d2d1.h in the PSDK has these annotated with "_In_opt_", and
> presumably it's generated with midl. 

FWIW, I'm pretty sure it's not. It contains a lot of things that would
be tricky or impossible to do with widl, like C++ default argument
values or overloaded inline functions wrappers around vtbl-based
functions. They even invented a new way of declaring C vtbl structs,
which contain parent's struct in the beginning, instead of duplicating
all functions.

I guess that it was decided that having a clean IDL is more important
than being compatible with MS in this case. Otherwise mingw-w64 version
would be available to port to Wine (some related headers may be still
useful):
http://repo.or.cz/w/mingw-w64/jacek.git/blob/HEAD:/mingw-w64-headers/include/d2d1.h

Cheers,
Jacek