Added a brief explanatory note to the X code for GLUT_CURSOR_NONE.

[freeglut] / src / freeglut_internal.h

diff --git a/src/freeglut_internal.h b/src/freeglut_internal.h
index 9cfe936..ea311b6 100644 (file)
--- a/src/freeglut_internal.h
+++ b/src/freeglut_internal.h
@@ -389,13 +389,14 @@ struct tagSFG_WindowState
  *
  */
 #define INVOKE_WCB(window,cbname,arg_list)    \
+do                                            \
 {                                             \
     if( FETCH_WCB( window, cbname ) )         \
     {                                         \
         fgSetWindow( &window );               \
         FETCH_WCB( window, cbname ) arg_list; \
     }                                         \
-}
+} while( 0 )
 
 /*
  * The window callbacks the user can supply us with. Should be kept portable.
@@ -697,6 +698,7 @@ GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly,
 
 /*
  * Window creation, opening, closing and destruction.
+ * Also CallBack clearing/initialization.
  * Defined in freeglut_structure.c, freeglut_window.c.
  */
 SFG_Window* fgCreateWindow( SFG_Window* parent, const char* title,
@@ -710,6 +712,7 @@ void        fgAddToWindowDestroyList ( SFG_Window* window,
                                        GLboolean needToClose ) ;
 void        fgCloseWindows ();
 void        fgDestroyWindow( SFG_Window* window, GLboolean needToClose );
+void        fgClearCallBacks( SFG_Window *window );
 
 /*
  * Menu creation and destruction. Defined in freeglut_structure.c