Clean up of include/osg/GL and include/osg/GLExtensions for better support of

Windows build.

include/osg/GL

@@ -12,8 +12,8 @@
         #ifdef __DARWIN_OSX__
             #include <OpenGL/gl.h>
         #else
-	        #include <GL/gl.h>
-	    #endif
+            #include <GL/gl.h>
+        #endif
     #endif
 
     // required for compatibility with glext.h sytle function definitions of 
@@ -22,64 +22,60 @@
         #define APIENTRY
     #endif
 
-#else
+#else // WIN32
 
-#if defined(__CYGWIN__) || defined(__MINGW32__)
-#  ifndef APIENTRY
-#   define GLUT_APIENTRY_DEFINED
-#   define APIENTRY    __stdcall
-#  endif
-	   // XXX This is from Win32's <winnt.h> 
-#  ifndef CALLBACK
-#    define CALLBACK __stdcall
-#  endif
+    #if defined(__CYGWIN__) || defined(__MINGW32__)
 
-#else // ! __CYGWIN__
+        #ifndef APIENTRY
+            #define GLUT_APIENTRY_DEFINED
+            #define APIENTRY    __stdcall
+        #endif
+               // XXX This is from Win32's <winnt.h> 
+        #ifndef CALLBACK
+            #define CALLBACK __stdcall
+        #endif
 
-    // Under windows avoid including <windows.h>
-    // to avoid name space pollution, but Win32's <GL/gl.h> 
-    // needs APIENTRY and WINGDIAPI defined properly. 
-    // F
-    # if defined(__MWERKS__)
-    #  define  WIN32_LEAN_AND_MEAN
-    #  include <windows.h>
-    # else
-       // XXX This is from Win32's <windef.h> 
-    #  ifndef APIENTRY
-    #   define GLUT_APIENTRY_DEFINED
-    #   if (_MSC_VER >= 800) || defined(_STDCALL_SUPPORTED)
-    #    define APIENTRY    __stdcall
-    #   else
-    #    define APIENTRY
-    #   endif
-    #  endif
-       // XXX This is from Win32's <winnt.h> 
-    #  ifndef CALLBACK
-    #   if (defined(_M_MRX000) || defined(_M_IX86) || defined(_M_ALPHA) || defined(_M_PPC)) && !defined(MIDL_PASS)
-    #    define CALLBACK __stdcall
-    #   else
-    #    define CALLBACK
-    #   endif
-    #  endif
+    #else // ! __CYGWIN__
 
-#endif // __CYGWIN__
+        // Under windows avoid including <windows.h>
+        // to avoid name space pollution, but Win32's <GL/gl.h> 
+        // needs APIENTRY and WINGDIAPI defined properly. 
+           // XXX This is from Win32's <windef.h> 
+        #ifndef APIENTRY
+            #define GLUT_APIENTRY_DEFINED
+            #if (_MSC_VER >= 800) || defined(_STDCALL_SUPPORTED)
+                #define APIENTRY    __stdcall
+            #else
+                #define APIENTRY
+            #endif
+        #endif
 
-	   // XXX This is from Win32's <wingdi.h> and <winnt.h> 
-#  ifndef WINGDIAPI
-#   define GLUT_WINGDIAPI_DEFINED
-#   define WINGDIAPI __declspec(dllimport)
-#  endif
-	   // XXX This is from Win32's <ctype.h> 
-#  ifndef _WCHAR_T_DEFINED
-typedef unsigned short wchar_t;
-#   define _WCHAR_T_DEFINED
-#  endif
-# endif
+         // XXX This is from Win32's <winnt.h> 
+        #ifndef CALLBACK
+            #if (defined(_M_MRX000) || defined(_M_IX86) || defined(_M_ALPHA) || defined(_M_PPC)) && !defined(MIDL_PASS)
+                #define CALLBACK __stdcall
+            #else
+                #define CALLBACK
+            #endif
+        #endif
+
+    #endif // __CYGWIN__
+
+           // XXX This is from Win32's <wingdi.h> and <winnt.h> 
+    #ifndef WINGDIAPI
+        #define GLUT_WINGDIAPI_DEFINED
+        #define WINGDIAPI __declspec(dllimport)
+    #endif
+           // XXX This is from Win32's <ctype.h> 
+    #ifndef _WCHAR_T_DEFINED
+        typedef unsigned short wchar_t;
+        #define _WCHAR_T_DEFINED
+    #endif
 
     #ifndef __gl_h_
         #include <GL/gl.h>
     #endif
 
-#endif
+#endif // WIN32
 
 #endif  // __osgGL_h

include/osg/GLExtensions

@@ -8,12 +8,13 @@
 #include <osg/Export>
 
 #if defined(WIN32)
-#include <windows.h>
+    #define WIN32_LEAN_AND_MEAN
+    #include <windows.h>
 #elif defined(__DARWIN_OSX__)
-#include <string>
-#include <mach-o/dyld.h>
+    #include <string>
+    #include <mach-o/dyld.h>
 #else
-#include <dlfcn.h>
+    #include <dlfcn.h>
 #endif
 
 namespace osg {