Added a new state variable "Initalized".

Replaced referenced to Time.Set with this new variable where appropriate.
fgElapsedTime() now set the start time if Time.Set is false.
Moved glutGet(GLUT_ELAPSED_TIME) handling to before the assert.


git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@348 7f0cb862-5218-0410-a997-914c9d46530a

freeglut/freeglut/src/freeglut_init.c

@@ -58,6 +58,7 @@ SFG_Display fgDisplay;
 SFG_State fgState = { { -1, -1, FALSE },  /* Position */
                       { 300, 300, TRUE }, /* Size */
                       GLUT_RGBA | GLUT_SINGLE | GLUT_DEPTH,  /* DisplayMode */
+                      FALSE,              /* Initalized */
                       FALSE,              /* ForceDirectContext */
                       TRUE,               /* TryDirectContext */
                       FALSE,              /* ForceIconic */
@@ -197,6 +198,8 @@ void fgInitialize( const char* displayName )
 #endif
 
     fgJoystickInit( 0 );
+
+    fgState.Initalized = GL_TRUE;
 }
 
 /*
@@ -206,13 +209,15 @@ void fgDeinitialize( void )
 {
     SFG_Timer *timer;
 
-    if( !fgState.Time.Set )
+    if( !fgState.Initalized )
     {
-        fgWarning( "fgDeinitialize(): fgState.Timer is null => "
+        fgWarning( "fgDeinitialize(): "
-            "no valid initialization has been performed" );
+                   "no valid initialization has been performed" );
         return;
     }
 
+    fgState.Initalized = GL_FALSE;
+
     /*
      * If there was a menu created, destroy the rendering context
      */
@@ -312,17 +317,12 @@ void FGAPIENTRY glutInit( int* pargc, char** argv )
     if( !fgState.ProgramName )
         fgError ("Could not allocate space for the program's name.");
 
-    if( fgState.Time.Set )
+    if( fgState.Initalized )
         fgError( "illegal glutInit() reinitialization attemp" );
 
     fgCreateStructure( );
 
-#if TARGET_HOST_UNIX_X11
+    fgElapsedTime( );
-    gettimeofday( &fgState.Time.Value, NULL );
-#elif TARGET_HOST_WIN32
-    fgState.Time.Value = timeGetTime( );
-#endif
-    fgState.Time.Set = TRUE;
 
     /* check if GLUT_FPS env var is set */
     {

freeglut/freeglut/src/freeglut_internal.h

@@ -218,6 +218,8 @@ struct tagSFG_State
     SFG_XYUse        Size;                 /* The default windows' size      */
     unsigned int     DisplayMode;          /* Display mode for new windows   */
 
+    GLboolean        Initalized;           /* Freeglut has been initalized   */
+
     GLboolean        ForceDirectContext;   /* Force direct rendering?        */
     GLboolean        TryDirectContext;     /* What about giving a try to?    */
 
@@ -643,7 +645,7 @@ extern SFG_State fgState;
  * A call to this function makes us sure that the Display and Structure
  * subsystems have been properly initialized and are ready to be used
  */
-#define  freeglut_assert_ready                      assert( fgState.Time.Set );
+#define  freeglut_assert_ready  assert( fgState.Initalized );
 
 /*
  * Following definitions are somewhat similiar to GLib's,

freeglut/freeglut/src/freeglut_main.c

@@ -296,19 +296,31 @@ static void fghCheckTimers( void )
  */
 long fgElapsedTime( void )
 {
+    if (fgState.Time.Set)
+    {
 #if TARGET_HOST_UNIX_X11
-    struct timeval now;
+        struct timeval now;
-    long elapsed;
+        long elapsed;
     
-    gettimeofday( &now, NULL );
+        gettimeofday( &now, NULL );
     
-    elapsed = (now.tv_usec - fgState.Time.Value.tv_usec) / 1000;
+        elapsed = (now.tv_usec - fgState.Time.Value.tv_usec) / 1000;
-    elapsed += (now.tv_sec - fgState.Time.Value.tv_sec) * 1000;
+        elapsed += (now.tv_sec - fgState.Time.Value.tv_sec) * 1000;
     
-    return elapsed;
+        return elapsed;
 #elif TARGET_HOST_WIN32
-    return timeGetTime() - fgState.Time.Value;
+        return timeGetTime() - fgState.Time.Value;
 #endif
+    }
+    else
+    {
+#if TARGET_HOST_UNIX_X11
+        gettimeofday( &fgState.Time.Value, NULL );
+#elif TARGET_HOST_WIN32
+        fgState.Time.Value = timeGetTime( );
+#endif
+        fgState.Time.Set = TRUE;
+    }
 }
 
 /*

freeglut/freeglut/src/freeglut_state.c

@@ -127,8 +127,14 @@ int FGAPIENTRY glutGet( GLenum eWhat )
     int returnValue ;
     GLboolean boolValue ;
 
-    if ( eWhat == GLUT_INIT_STATE )
+    switch (eWhat)
-        return ( fgState.Time.Set ) ;
+    {
+    case GLUT_INIT_STATE:
+        return ( fgState.Initalized ) ;
+
+    case GLUT_ELAPSED_TIME:
+        return( fgElapsedTime() );
+    }
 
     freeglut_assert_ready;
 
@@ -137,9 +143,6 @@ int FGAPIENTRY glutGet( GLenum eWhat )
      */
     switch( eWhat )
     {
-    case GLUT_ELAPSED_TIME:
-        return( fgElapsedTime() );
-
     /*
      * Following values are stored in fgState and fgDisplay global structures
      */

freeglut/freeglut/src/freeglut_structure.c

@@ -83,7 +83,7 @@ SFG_Window* fgCreateWindow( SFG_Window* parent, const char* title,
      * If the freeglut internals haven't been initialized yet,
      * do it now. Hack's idea courtesy of Chris Purnell...
      */
-    if( !fgState.Time.Set )
+    if( !fgState.Initalized )
         glutInit( &fakeArgc, NULL );
 
     /*
@@ -136,7 +136,7 @@ SFG_Menu* fgCreateMenu( FGCBMenu menuCallback )
      * If the freeglut internals haven't been initialized yet,
      * do it now. Hack's idea courtesy of Chris Purnell...
      */
-    if( !fgState.Time.Set )
+    if( !fgState.Initalized )
         glutInit( &fakeArgc, NULL );
 
     menu->ParentWindow = fgStructure.Window;

freeglut/freeglut/src/freeglut_window.c

@@ -960,7 +960,8 @@ void FGAPIENTRY glutFullScreen( void )
             fgDisplay.ScreenWidth,
             fgDisplay.ScreenHeight
         );
-        XFlush( fgDisplay.Display ); /* XXX Shouldn't need this */
+
+        XFlush( fgDisplay.Display ); /* This is needed */
 
         XTranslateCoordinates(
             fgDisplay.Display,