*/
void FGAPIENTRY glutDisplayFunc( void (* callback)( void ) )
{
+ if( !callback )
+ fgError ("Fatal error in program. NULL display callback not "
+ "permitted in GLUT 3.0+ or freeglut 2.0.1+\n");
SET_CALLBACK( Display );
+ fgStructure.Window->State.Redisplay = TRUE;
}
/*
void FGAPIENTRY glutIdleFunc( void (* callback)( void ) )
{
freeglut_assert_ready;
-
- /*
- * The global idle callback pointer is stored in fgState structure
- */
fgState.IdleCallback = callback;
}
freeglut_assert_ready;
- /*
- * Create a new freeglut timer hook structure
- */
- timer = calloc( sizeof(SFG_Timer), 1 );
+ timer = (SFG_Timer *)calloc( sizeof(SFG_Timer), 1 );
+ if (!timer)
+ fgError ("Fatal error: "
+ "Memory allocation failure in glutTimerFunc()\n");
- /*
- * Remember the callback address and timer hook's ID
- */
timer->Callback = callback;
timer->ID = timerID;
-
- /*
- * When will the time out happen (in terms of window's timer)
- */
timer->TriggerTime = fgElapsedTime() + timeOut;
-
- /*
- * Have the new hook attached to the current window
- */
fgListAppend( &fgState.Timers, &timer->Node );
}
/*
* Sets the Visibility callback for the current window.
- *
- * I had to peer to GLUT sources to clean up the mess.
- * Can anyone please explain me what is going on here?!?
*/
static void fghVisibility( int status )
{
- freeglut_assert_ready; freeglut_return_if_fail( fgStructure.Window != NULL );
+ freeglut_assert_ready;
+ freeglut_return_if_fail( fgStructure.Window != NULL );
freeglut_return_if_fail( fgStructure.Window->Callbacks.Visibility != NULL );
if( status == GLUT_HIDDEN || status == GLUT_FULLY_COVERED )
void FGAPIENTRY glutJoystickFunc( void (* callback)( unsigned int, int, int, int ), int pollInterval )
{
SET_CALLBACK( Joystick );
-
- freeglut_return_if_fail( fgStructure.Window != NULL );
-
- /*
- * Do not forget setting the joystick poll rate
- */
fgStructure.Window->State.JoystickPollRate = pollInterval;
- /*
- * Make sure the joystick polling routine gets called as early as possible:
- */
fgStructure.Window->State.JoystickLastPoll =
fgElapsedTime() - fgStructure.Window->State.JoystickPollRate;
}
/*
- * Sets the mouse motion callback for the current window (one or more buttons are pressed)
+ * Sets the mouse motion callback for the current window (one or more buttons
+ * are pressed)
*/
void FGAPIENTRY glutMotionFunc( void (* callback)( int, int ) )
{
}
/*
- * Sets the passive mouse motion callback for the current window (no mouse buttons are pressed)
+ * Sets the passive mouse motion callback for the current window (no mouse
+ * buttons are pressed)
*/
void FGAPIENTRY glutPassiveMotionFunc( void (* callback)( int, int ) )
{
/* A. Donev: Destruction callback for menus */
void FGAPIENTRY glutMenuDestroyFunc( void (* callback)( void ) )
{
- if( fgStructure.Menu == NULL ) return;
+ if( fgStructure.Menu == NULL )
+ return;
fgStructure.Menu->Destroy = callback;
}
void FGAPIENTRY glutMenuStateFunc( void (* callback)( int ) )
{
freeglut_assert_ready;
-
fgState.MenuStateCallback = callback;
}
void FGAPIENTRY glutMenuStatusFunc( void (* callback)( int, int, int ) )
{
freeglut_assert_ready;
-
fgState.MenuStatusCallback = callback;
}