WinRT: merged with SDL 2.0.0 codebase (aka. SDL hg rev d4ce48ff30d1)

src/core/windows/SDL_windows.c

@@ -20,21 +20,21 @@
 */
 #include "SDL_config.h"
 
-#ifdef __WIN32__
+#if defined(__WIN32__) || defined(__WINRT__)
 
 #include "SDL_error.h"
 #include "SDL_windows.h"
 #include "SDL_assert.h"
 
-#include <objbase.h>  /* for CoInitialize/CoUninitialize */
+#include <objbase.h>  /* for CoInitialize/CoUninitialize (Win32 only) */
 
 /* Sets an error message based on GetLastError() */
 int
-WIN_SetError(const char *prefix)
+WIN_SetErrorFromHRESULT(const char *prefix, HRESULT hr)
 {
     TCHAR buffer[1024];
     char *message;
-    FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(), 0,
+    FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, hr, 0,
                   buffer, SDL_arraysize(buffer), NULL);
     message = WIN_StringToUTF8(buffer);
     SDL_SetError("%s%s%s", prefix ? prefix : "", prefix ? ": " : "", message);
@@ -42,9 +42,24 @@ WIN_SetError(const char *prefix)
     return -1;
 }
 
+/* Sets an error message based on GetLastError() */
+int
+WIN_SetError(const char *prefix)
+{
+    return WIN_SetErrorFromHRESULT(prefix, GetLastError());
+}
+
 HRESULT
 WIN_CoInitialize(void)
 {
+#ifdef __WINRT__
+    /* DLudwig: On WinRT, it is assumed that COM was initialized in main().
+       CoInitializeEx is available (not CoInitialize though), however
+       on WinRT, main() is typically declared with the [MTAThread]
+       attribute, which, AFAIK, should initialize COM.
+    */
+    return S_OK;
+#else
     const HRESULT hr = CoInitialize(NULL);
 
     /* S_FALSE means success, but someone else already initialized. */
@@ -54,12 +69,15 @@ WIN_CoInitialize(void)
     }
 
     return hr;
+#endif
 }
 
 void
 WIN_CoUninitialize(void)
 {
+#ifndef __WINRT__
     CoUninitialize();
+#endif
 }
 
 #endif /* __WIN32__ */