Added a way to get the Windows OpenGL context in SDL_syswm.h

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40439

include/SDL_syswm.h

@@ -111,6 +111,7 @@ typedef struct {
 } SDL_SysWMinfo;
 
 #elif defined(WIN32)
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 
 /* The windows custom event structure */
@@ -126,6 +127,7 @@ struct SDL_SysWMmsg {
 typedef struct {
 	SDL_version version;
 	HWND window;			/* The Win32 display window */
+	HGLRC hglrc;			/* The OpenGL context, if any */
 } SDL_SysWMinfo;
 
 #else

src/video/wincommon/SDL_syswm.c

@@ -267,6 +267,16 @@ int WIN_GetWMInfo(_THIS, SDL_SysWMinfo *info)
 {
 	if ( info->version.major <= SDL_MAJOR_VERSION ) {
 		info->window = SDL_Window;
+		if ( SDL_VERSIONNUM(info->version.major,
+		                    info->version.minor,
+		                    info->version.patch) >=
+		     SDL_VERSION(1, 2, 5) ) {
+#ifdef HAVE_OPENGL
+			info->hglrc = GL_hrc;
+#else
+			info->hglrc = NULL;
+#endif
+		}
 		return(1);
 	} else {
 		SDL_SetError("Application not compiled with SDL %d.%d\n",