4 * The freeglut library private include file.
6 * Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
7 * Written by Pawel W. Olszta, <olszta@sourceforge.net>
8 * Creation date: Thu Dec 2 1999
10 * Permission is hereby granted, free of charge, to any person obtaining a
11 * copy of this software and associated documentation files (the "Software"),
12 * to deal in the Software without restriction, including without limitation
13 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
14 * and/or sell copies of the Software, and to permit persons to whom the
15 * Software is furnished to do so, subject to the following conditions:
17 * The above copyright notice and this permission notice shall be included
18 * in all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
24 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
25 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 #ifndef FREEGLUT_INTERNAL_H
29 #define FREEGLUT_INTERNAL_H
35 /* XXX Update these for each release! */
36 #define VERSION_MAJOR 2
37 #define VERSION_MINOR 2
38 #define VERSION_PATCH 0
40 /* Freeglut is meant to be available under all Unix/X11 and Win32 platforms. */
41 #if defined(_WIN32_WCE)
42 # define TARGET_HOST_UNIX_X11 0
43 # define TARGET_HOST_WIN32 0
44 # define TARGET_HOST_WINCE 1
45 #elif defined(_MSC_VER) || defined(__CYGWIN__) || defined(__MINGW32__)
46 # define TARGET_HOST_UNIX_X11 0
47 # define TARGET_HOST_WIN32 1
48 # define TARGET_HOST_WINCE 0
50 # define TARGET_HOST_UNIX_X11 1
51 # define TARGET_HOST_WIN32 0
52 # define TARGET_HOST_WINCE 0
55 #define FREEGLUT_MAX_MENUS 3
57 /* Somehow all Win32 include headers depend on this one: */
66 #define strdup _strdup
69 /* Those files should be available on every platform. */
77 #if TARGET_HOST_UNIX_X11
79 # if TIME_WITH_SYS_TIME
80 # include <sys/time.h>
84 # include <sys/time.h>
91 /* The system-dependant include files should go here: */
92 #if TARGET_HOST_UNIX_X11
95 #include <X11/Xatom.h>
96 #include <X11/keysym.h>
98 #ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
99 #include <X11/extensions/xf86vmode.h>
103 /* Microsoft VisualC++ 5.0's <math.h> does not define the PI */
105 # define M_PI 3.14159265358979323846
116 /* -- GLOBAL TYPE DEFINITIONS ---------------------------------------------- */
118 /* Freeglut callbacks type definitions */
119 typedef void (* FGCBDisplay )( void );
120 typedef void (* FGCBReshape )( int, int );
121 typedef void (* FGCBVisibility )( int );
122 typedef void (* FGCBKeyboard )( unsigned char, int, int );
123 typedef void (* FGCBSpecial )( int, int, int );
124 typedef void (* FGCBMouse )( int, int, int, int );
125 typedef void (* FGCBMouseWheel )( int, int, int, int );
126 typedef void (* FGCBMotion )( int, int );
127 typedef void (* FGCBPassive )( int, int );
128 typedef void (* FGCBEntry )( int );
129 typedef void (* FGCBWindowStatus )( int );
130 typedef void (* FGCBSelect )( int, int, int );
131 typedef void (* FGCBJoystick )( unsigned int, int, int, int );
132 typedef void (* FGCBKeyboardUp )( unsigned char, int, int );
133 typedef void (* FGCBSpecialUp )( int, int, int );
134 typedef void (* FGCBOverlayDisplay)( void );
135 typedef void (* FGCBSpaceMotion )( int, int, int );
136 typedef void (* FGCBSpaceRotation )( int, int, int );
137 typedef void (* FGCBSpaceButton )( int, int );
138 typedef void (* FGCBDials )( int, int );
139 typedef void (* FGCBButtonBox )( int, int );
140 typedef void (* FGCBTabletMotion )( int, int );
141 typedef void (* FGCBTabletButton )( int, int, int, int );
142 typedef void (* FGCBDestroy )( void );
144 /* The global callbacks type definitions */
145 typedef void (* FGCBIdle )( void );
146 typedef void (* FGCBTimer )( int );
147 typedef void (* FGCBMenuState )( int );
148 typedef void (* FGCBMenuStatus )( int, int, int );
150 /* The callback used when creating/using menus */
151 typedef void (* FGCBMenu )( int );
154 /* A list structure */
155 typedef struct tagSFG_List SFG_List;
162 /* A list node structure */
163 typedef struct tagSFG_Node SFG_Node;
170 /* A helper structure holding two ints and a boolean */
171 typedef struct tagSFG_XYUse SFG_XYUse;
174 GLint X, Y; /* The two integers... */
175 GLboolean Use; /* ...and a single boolean. */
178 /* A helper structure holding a timeval and a boolean */
179 typedef struct tagSFG_Time SFG_Time;
182 #if TARGET_HOST_WIN32 || TARGET_HOST_WINCE
185 struct timeval Value;
191 * An enumeration containing the state of the GLUT execution:
192 * initializing, running, or stopping
196 GLUT_EXEC_STATE_INIT,
197 GLUT_EXEC_STATE_RUNNING,
201 /* This structure holds different freeglut settings */
202 typedef struct tagSFG_State SFG_State;
205 SFG_XYUse Position; /* The default windows' position */
206 SFG_XYUse Size; /* The default windows' size */
207 unsigned int DisplayMode; /* Display mode for new windows */
209 GLboolean Initialised; /* freeglut has been initialised */
211 int DirectContext; /* Direct rendering state */
213 GLboolean ForceIconic; /* New top windows are iconified */
214 GLboolean UseCurrentContext; /* New windows share with current */
216 GLboolean GLDebugSwitch; /* OpenGL state debugging switch */
217 GLboolean XSyncSwitch; /* X11 sync protocol switch */
219 int KeyRepeat; /* Global key repeat mode. */
220 int Modifiers; /* Current ALT/SHIFT/CTRL state */
222 GLuint FPSInterval; /* Interval between FPS printfs */
223 GLuint SwapCount; /* Count of glutSwapBuffer calls */
224 GLuint SwapTime; /* Time of last SwapBuffers */
226 SFG_Time Time; /* Time that glutInit was called */
227 SFG_List Timers; /* The freeglut timer hooks */
228 SFG_List FreeTimers; /* The unused timer hooks */
230 FGCBIdle IdleCallback; /* The global idle callback */
232 int ActiveMenus; /* Num. of currently active menus */
233 FGCBMenuState MenuStateCallback; /* Menu callbacks are global */
234 FGCBMenuStatus MenuStatusCallback;
236 SFG_XYUse GameModeSize; /* Game mode screen's dimensions */
237 int GameModeDepth; /* The pixel depth for game mode */
238 int GameModeRefresh; /* The refresh rate for game mode */
240 int ActionOnWindowClose; /* Action when user closes window */
242 fgExecutionState ExecState; /* Used for GLUT termination */
243 char *ProgramName; /* Name of the invoking program */
244 GLboolean JoysticksInitialised; /* Only initialize if application calls for them */
247 /* The structure used by display initialization in freeglut_init.c */
248 typedef struct tagSFG_Display SFG_Display;
249 struct tagSFG_Display
251 #if TARGET_HOST_UNIX_X11
252 Display* Display; /* The display we are being run in. */
253 int Screen; /* The screen we are about to use. */
254 Window RootWindow; /* The screen's root window. */
255 int Connection; /* The display's connection number */
256 Atom DeleteWindow; /* The window deletion atom */
258 #ifdef X_XF86VidModeGetModeLine
260 * XF86VidMode may be compilable even if it fails at runtime. Therefore,
261 * the validity of the VidMode has to be tracked
263 int DisplayModeValid; /* Flag that indicates runtime status*/
264 XF86VidModeModeLine DisplayMode; /* Current screen's display settings */
265 int DisplayModeClock; /* The display mode's refresh rate */
266 int DisplayViewPortX; /* saved X location of the viewport */
267 int DisplayViewPortY; /* saved Y location of the viewport */
268 int DisplayPointerX; /* saved X location of the pointer */
269 int DisplayPointerY; /* saved Y location of the pointer */
273 #elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
274 HINSTANCE Instance; /* The application's instance */
275 DEVMODE DisplayMode; /* Desktop's display settings */
279 int ScreenWidth; /* The screen's width in pixels */
280 int ScreenHeight; /* The screen's height in pixels */
281 int ScreenWidthMM; /* The screen's width in milimeters */
282 int ScreenHeightMM; /* The screen's height in milimeters */
286 /* The user can create any number of timer hooks */
287 typedef struct tagSFG_Timer SFG_Timer;
291 int ID; /* The timer ID integer */
292 FGCBTimer Callback; /* The timer callback */
293 long TriggerTime; /* The timer trigger time */
297 * Make "freeglut" window handle and context types so that we don't need so
298 * much conditionally-compiled code later in the library.
300 #if TARGET_HOST_UNIX_X11
302 typedef Window SFG_WindowHandleType ;
303 typedef GLXContext SFG_WindowContextType ;
305 #elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
307 typedef HWND SFG_WindowHandleType ;
308 typedef HGLRC SFG_WindowContextType ;
313 * A window and its OpenGL context. The contents of this structure
314 * are highly dependant on the target operating system we aim at...
316 typedef struct tagSFG_Context SFG_Context;
317 struct tagSFG_Context
319 SFG_WindowHandleType Handle; /* The window's handle */
320 SFG_WindowContextType Context; /* The window's OpenGL/WGL context */
322 #if TARGET_HOST_UNIX_X11
323 XVisualInfo* VisualInfo; /* The window's visual information */
324 Pixmap Pixmap; /* Used for offscreen rendering */
325 /* GLXPixmap GLXPixMap; */ /* Used for offscreen rendering */
326 #elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
327 HDC Device; /* The window's device context */
330 int DoubleBuffered; /* Treat the window as double-buffered */
333 /* Window's state description. This structure should be kept portable. */
334 typedef struct tagSFG_WindowState SFG_WindowState;
335 struct tagSFG_WindowState
337 int Width; /* Window's width in pixels */
338 int Height; /* The same about the height */
339 int OldWidth; /* Window width from before a resize */
340 int OldHeight; /* " height " " " " */
342 GLboolean Redisplay; /* Do we have to redisplay? */
343 GLboolean Visible; /* Is the window visible now */
345 int Cursor; /* The currently selected cursor */
347 long JoystickPollRate; /* The joystick polling rate */
348 long JoystickLastPoll; /* When the last poll happened */
350 int MouseX, MouseY; /* The most recent mouse position */
352 GLboolean IgnoreKeyRepeat; /* Whether to ignore key repeat. */
353 GLboolean KeyRepeating; /* Currently in repeat mode */
355 GLboolean IsGameMode; /* Is this the game mode window? */
356 GLboolean NeedToResize; /* Do we need to resize the window? */
361 * SET_WCB() is used as:
363 * SET_WCB( window, Visibility, func );
365 * ...where {window} is the freeglut window to set the callback,
366 * {Visibility} is the window-specific callback to set,
367 * {func} is a function-pointer.
369 * Originally, {FETCH_WCB( ... ) = func} was rather sloppily used,
370 * but this can cause warnings because the FETCH_WCB() macro type-
371 * casts its result, and a type-cast value shouldn't be an lvalue.
373 * The {if( FETCH_WCB( ... ) != func )} test is to do type-checking
374 * and for no other reason. Since it's hidden in the macro, the
375 * ugliness is felt to be rather benign.
377 #define SET_WCB(window,cbname,func) \
380 if( FETCH_WCB( window, cbname ) != func ) \
381 (((window).CallBacks[CB_ ## cbname]) = (void *) func); \
385 * FETCH_WCB() is used as:
387 * FETCH_WCB( window, Visibility );
389 * ...where {window} is the freeglut window to fetch the callback from,
390 * {Visibility} is the window-specific callback to fetch.
392 * The result is correctly type-cast to the callback function pointer
395 #define FETCH_WCB(window,cbname) \
396 ((FGCB ## cbname)((window).CallBacks[CB_ ## cbname]))
399 * INVOKE_WCB() is used as:
401 * INVOKE_WCB( window, Visibility, ( status ) );
403 * ...where {window} is the freeglut window,
404 * {Visibility} is the window-specific callback,
405 * {(status)} is the parameter list.
407 * The callback is invoked as:
409 * callback( status );
411 * ...so the parentheses are REQUIRED in the {arg_list}.
413 * NOTE that it does a sanity-check and also sets the
417 #define INVOKE_WCB(window,cbname,arg_list) \
420 if( FETCH_WCB( window, cbname ) ) \
422 fgSetWindow( &window ); \
423 FETCH_WCB( window, cbname ) arg_list; \
428 * The window callbacks the user can supply us with. Should be kept portable.
430 * This enumeration provides the freeglut CallBack numbers.
431 * The symbolic constants are indices into a window's array of
432 * function callbacks. The names are formed by splicing a common
433 * prefix onto the callback's base name. (This was originally
434 * done so that an early stage of development could live side-by-
435 * side with the old callback code. The old callback code used
436 * the bare callback's name as a structure member, so I used a
437 * prefix for the array index name.)
439 * XXX For consistancy, perhaps the prefix should match the
440 * XXX FETCH* and INVOKE* macro suffices. I.e., WCB_, rather than
461 /* Presently ignored */
472 /* Always make this the LAST one */
477 /* This structure holds the OpenGL rendering context for all the menu windows */
478 typedef struct tagSFG_MenuContext SFG_MenuContext;
479 struct tagSFG_MenuContext
481 #if TARGET_HOST_UNIX_X11
482 XVisualInfo* VisualInfo; /* The window's visual information */
485 SFG_WindowContextType Context; /* The menu window's WGL context */
488 /* This structure describes a menu */
489 typedef struct tagSFG_Window SFG_Window;
490 typedef struct tagSFG_MenuEntry SFG_MenuEntry;
491 typedef struct tagSFG_Menu SFG_Menu;
495 void *UserData; /* User data passed back at callback */
496 int ID; /* The global menu ID */
497 SFG_List Entries; /* The menu entries list */
498 FGCBMenu Callback; /* The menu callback */
499 FGCBDestroy Destroy; /* Destruction callback */
500 GLboolean IsActive; /* Is the menu selected? */
501 int Width; /* Menu box width in pixels */
502 int Height; /* Menu box height in pixels */
503 int X, Y; /* Menu box raster position */
505 SFG_MenuEntry *ActiveEntry; /* Currently active entry in the menu */
506 SFG_Window *Window; /* Window for menu */
507 SFG_Window *ParentWindow; /* Window in which the menu is defined */
510 /* This is a menu entry */
511 struct tagSFG_MenuEntry
514 int ID; /* The menu entry ID (local) */
515 int Ordinal; /* The menu's ordinal number */
516 char* Text; /* The text to be displayed */
517 SFG_Menu* SubMenu; /* Optional sub-menu tree */
518 GLboolean IsActive; /* Is the entry highlighted? */
519 int Width; /* Label's width in pixels */
523 * A window, making part of freeglut windows hierarchy.
524 * Should be kept portable.
529 int ID; /* Window's ID number */
531 SFG_Context Window; /* Window and OpenGL context */
532 SFG_WindowState State; /* The window state */
533 void *CallBacks[ TOTAL_CALLBACKS ]; /* Array of window callbacks */
534 void *UserData ; /* For use by user */
536 SFG_Menu* Menu[ FREEGLUT_MAX_MENUS ]; /* Menus appended to window */
537 SFG_Menu* ActiveMenu; /* The window's active menu */
539 SFG_Window* Parent; /* The parent to this window */
540 SFG_List Children; /* The subwindows d.l. list */
542 GLboolean IsMenu; /* Set to 1 if we are a menu */
546 /* A linked list structure of windows */
547 typedef struct tagSFG_WindowList SFG_WindowList ;
548 struct tagSFG_WindowList
554 /* This holds information about all the windows, menus etc. */
555 typedef struct tagSFG_Structure SFG_Structure;
556 struct tagSFG_Structure
558 SFG_List Windows; /* The global windows list */
559 SFG_List Menus; /* The global menus list */
560 SFG_List WindowsToDestroy;
562 SFG_Window* Window; /* The currently active win. */
563 SFG_Menu* Menu; /* Same, but menu... */
565 SFG_MenuContext* MenuContext; /* OpenGL rendering context for menus */
567 SFG_Window* GameMode; /* The game mode window */
569 int WindowID; /* The new current window ID */
570 int MenuID; /* The new current menu ID */
574 * This structure is used for the enumeration purposes.
575 * You can easily extend its functionalities by declaring
576 * a structure containing enumerator's contents and custom
577 * data, then casting its pointer to (SFG_Enumerator *).
579 typedef struct tagSFG_Enumerator SFG_Enumerator;
580 struct tagSFG_Enumerator
582 GLboolean found; /* Used to terminate search */
583 void* data; /* Custom data pointer */
585 typedef void (* FGCBenumerator )( SFG_Window *, SFG_Enumerator * );
587 /* The bitmap font structure */
588 typedef struct tagSFG_Font SFG_Font;
591 char* Name; /* The source font name */
592 int Quantity; /* Number of chars in font */
593 int Height; /* Height of the characters */
594 const GLubyte** Characters; /* The characters mapping */
596 float xorig, yorig; /* Relative origin of the character */
599 /* The stroke font structures */
601 typedef struct tagSFG_StrokeVertex SFG_StrokeVertex;
602 struct tagSFG_StrokeVertex
607 typedef struct tagSFG_StrokeStrip SFG_StrokeStrip;
608 struct tagSFG_StrokeStrip
611 const SFG_StrokeVertex* Vertices;
614 typedef struct tagSFG_StrokeChar SFG_StrokeChar;
615 struct tagSFG_StrokeChar
619 const SFG_StrokeStrip* Strips;
622 typedef struct tagSFG_StrokeFont SFG_StrokeFont;
623 struct tagSFG_StrokeFont
625 char* Name; /* The source font name */
626 int Quantity; /* Number of chars in font */
627 GLfloat Height; /* Height of the characters */
628 const SFG_StrokeChar** Characters; /* The characters mapping */
631 /* -- GLOBAL VARIABLES EXPORTS --------------------------------------------- */
633 /* Freeglut display related stuff (initialized once per session) */
634 extern SFG_Display fgDisplay;
636 /* Freeglut internal structure */
637 extern SFG_Structure fgStructure;
639 /* The current freeglut settings */
640 extern SFG_State fgState;
643 /* -- PRIVATE FUNCTION DECLARATIONS ---------------------------------------- */
646 * A call to this function makes us sure that the Display and Structure
647 * subsystems have been properly initialized and are ready to be used
649 #define FREEGLUT_EXIT_IF_NOT_INITIALISED( string ) \
650 if ( ! fgState.Initialised ) \
652 fgError ( " ERROR: Function <%s> called" \
653 " without first calling 'glutInit'.", (string) ) ; \
656 #define FREEGLUT_INTERNAL_ERROR_EXIT_IF_NOT_INITIALISED( string ) \
657 if ( ! fgState.Initialised ) \
659 fgError ( " ERROR: Internal <%s> function called" \
660 " without first calling 'glutInit'.", (string) ) ; \
663 #define FREEGLUT_INTERNAL_ERROR_EXIT( cond, string, function ) \
666 fgError ( " ERROR: Internal error <%s> in function %s", \
667 (string), (function) ) ; \
671 * Following definitions are somewhat similiar to GLib's,
672 * but do not generate any log messages:
674 #define freeglut_return_if_fail( expr ) \
677 #define freeglut_return_val_if_fail( expr, val ) \
682 * A call to those macros assures us that there is a current
683 * window set, respectively:
685 #define FREEGLUT_EXIT_IF_NO_WINDOW( string ) \
686 if ( ! fgStructure.Window ) \
688 fgError ( " ERROR: Function <%s> called" \
689 " with no current window defined.", (string) ) ; \
693 * The deinitialize function gets called on glutMainLoop() end. It should clean up
694 * everything inside of the freeglut
696 void fgDeinitialize( void );
699 * Those two functions are used to create/destroy the freeglut internal
700 * structures. This actually happens when calling glutInit() and when
701 * quitting the glutMainLoop() (which actually happens, when all windows
704 void fgCreateStructure( void );
705 void fgDestroyStructure( void );
707 /* A helper function to check if a display mode is possible to use */
708 #if TARGET_HOST_UNIX_X11
709 XVisualInfo* fgChooseVisual( void );
712 /* The window procedure for Win32 events handling */
713 #if TARGET_HOST_WIN32 || TARGET_HOST_WINCE
714 LRESULT CALLBACK fgWindowProc( HWND hWnd, UINT uMsg,
715 WPARAM wParam, LPARAM lParam );
716 GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly,
717 unsigned char layer_type );
721 * Window creation, opening, closing and destruction.
722 * Also CallBack clearing/initialization.
723 * Defined in freeglut_structure.c, freeglut_window.c.
725 SFG_Window* fgCreateWindow( SFG_Window* parent, const char* title,
726 int x, int y, int w, int h,
727 GLboolean gameMode, GLboolean isMenu );
728 void fgSetWindow ( SFG_Window *window );
729 void fgOpenWindow( SFG_Window* window, const char* title,
730 int x, int y, int w, int h, GLboolean gameMode,
731 GLboolean isSubWindow );
732 void fgCloseWindow( SFG_Window* window );
733 void fgAddToWindowDestroyList ( SFG_Window* window );
734 void fgCloseWindows ();
735 void fgDestroyWindow( SFG_Window* window );
737 /* Menu creation and destruction. Defined in freeglut_structure.c */
738 SFG_Menu* fgCreateMenu( FGCBMenu menuCallback );
739 void fgDestroyMenu( SFG_Menu* menu );
741 /* Joystick device management functions, defined in freeglut_joystick.c */
742 int fgJoystickDetect( void );
743 void fgInitialiseJoysticks( void );
744 void fgJoystickClose( void );
745 void fgJoystickPollWindow( SFG_Window* window );
747 /* More joystick functions. Should these go into the API? */
748 int glutJoystickGetNumAxes( int ident );
749 int glutJoystickGetNumButtons( int ident );
750 int glutJoystickNotWorking( int ident );
753 * Helper function to enumerate through all registered windows
754 * and one to enumerate all of a window's subwindows...
756 * The GFunc callback for those functions will be defined as:
758 * void enumCallback( gpointer window, gpointer enumerator );
760 * where window is the enumerated (sub)window pointer (SFG_Window *),
761 * and userData is the a custom user-supplied pointer. Functions
762 * are defined and exported from freeglut_structure.c file.
764 void fgEnumWindows( FGCBenumerator enumCallback, SFG_Enumerator* enumerator );
765 void fgEnumSubWindows( SFG_Window* window, FGCBenumerator enumCallback,
766 SFG_Enumerator* enumerator );
769 * fgWindowByHandle returns a (SFG_Window *) value pointing to the
770 * first window in the queue matching the specified window handle.
771 * The function is defined in freeglut_structure.c file.
773 SFG_Window* fgWindowByHandle( SFG_WindowHandleType hWindow );
776 * This function is similiar to the previous one, except it is
777 * looking for a specified (sub)window identifier. The function
778 * is defined in freeglut_structure.c file.
780 SFG_Window* fgWindowByID( int windowID );
783 * Looks up a menu given its ID. This is easier than fgWindowByXXX
784 * as all menus are placed in a single doubly linked list...
786 SFG_Menu* fgMenuByID( int menuID );
789 * The menu activation and deactivation the code. This is the meat
790 * of the menu user interface handling code...
792 void fgActivateMenu( SFG_Window* window, int button );
793 GLboolean fgCheckActiveMenu ( SFG_Window *window, int button, GLboolean pressed,
794 int mouse_x, int mouse_y );
795 void fgDeactivateMenu( SFG_Window *window );
796 void fgDeactivateSubMenu( SFG_MenuEntry *menuEntry );
799 * This function gets called just before the buffers swap, so that
800 * freeglut can display the pull-down menus via OpenGL. The function
801 * is defined in freeglut_menu.c file.
803 void fgDisplayMenu( void );
806 * Display the mouse cursor using OpenGL calls. The function
807 * is defined in freeglut_cursor.c file.
809 void fgDisplayCursor( void );
811 /* Elapsed time as per glutGet(GLUT_ELAPSED_TIME). */
812 long fgElapsedTime( void );
815 void fgListInit(SFG_List *list);
816 void fgListAppend(SFG_List *list, SFG_Node *node);
817 void fgListRemove(SFG_List *list, SFG_Node *node);
818 int fgListLength(SFG_List *list);
819 void fgListInsert(SFG_List *list, SFG_Node *next, SFG_Node *node);
821 /* Error Message functions */
822 void fgError( const char *fmt, ... );
823 void fgWarning( const char *fmt, ... );
825 #endif /* FREEGLUT_INTERNAL_H */
827 /*** END OF FILE ***/