SDL/src/main/winrt/SDL_winrt_main_NonXAML.cpp

#include <wrl.h>

/* At least one file in any SDL/WinRT app appears to require compilation
   with C++/CX, otherwise a Windows Metadata file won't get created, and
   an APPX0702 build error can appear shortly after linking.

   The following set of preprocessor code forces this file to be compiled
   as C++/CX, which appears to cause Visual C++ 2012's build tools to
   create this .winmd file, and will help allow builds of SDL/WinRT apps
   to proceed without error.

   If other files in an app's project enable C++/CX compilation, then it might
   be possible for SDL_winrt_main_NonXAML.cpp to be compiled without /ZW,
   for Visual C++'s build tools to create a winmd file, and for the app to
   build without APPX0702 errors.  In this case, if
   SDL_WINRT_METADATA_FILE_AVAILABLE is defined as a C/C++ macro, then
   the #error (to force C++/CX compilation) will be disabled.

   Please note that /ZW can be specified on a file-by-file basis.  To do this,
   right click on the file in Visual C++, click Properties, then change the
   setting through the dialog that comes up.
*/
#ifndef SDL_WINRT_METADATA_FILE_AVAILABLE
#ifndef __cplusplus_winrt
#error SDL_winrt_main_NonXAML.cpp must be compiled with /ZW, otherwise build errors due to missing .winmd files can occur.
#endif
#endif


/* The app's C-style main will be passed into SDL.dll as a function
   pointer, and called at the appropriate time.
*/
extern __declspec(dllimport) int SDL_WinRT_RunApplication(int (*)(int, char **));
extern "C" int SDL_main(int, char **);

/* Prevent MSVC++ from warning about threading models when defining our
   custom WinMain.  The threading model will instead be set via a direct
   call to Windows::Foundation::Initialize (rather than via an attributed
   function).

   To note, this warning (C4447) does not seem to come up unless this file
   is compiled with C++/CX enabled (via the /ZW compiler flag).
*/
#ifdef _MSC_VER
#pragma warning(disable:4447)
#endif

/* Make sure the function to initialize the Windows Runtime gets linked in. */
#ifdef _MSC_VER
#pragma comment(lib, "runtimeobject.lib")
#endif

int CALLBACK  WinMain(HINSTANCE, HINSTANCE, LPSTR, int)
{
    if (FAILED(Windows::Foundation::Initialize(RO_INIT_MULTITHREADED))) {
        return 1;
    }

    SDL_WinRT_RunApplication(SDL_main);
    return 0;
}