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. */
78 # include <sys/types.h>
83 #if TIME_WITH_SYS_TIME
84 # include <sys/time.h>
88 # include <sys/time.h>
94 /* The system-dependant include files should go here: */
95 #if TARGET_HOST_UNIX_X11
98 #include <X11/Xatom.h>
99 #include <X11/keysym.h>
101 #ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
102 #include <X11/extensions/xf86vmode.h>
106 /* Microsoft VisualC++ 5.0's <math.h> does not define the PI */
108 # define M_PI 3.14159265358979323846
119 /* -- GLOBAL TYPE DEFINITIONS ---------------------------------------------- */
121 /* Freeglut callbacks type definitions */
122 typedef void (* FGCBDisplay )( void );
123 typedef void (* FGCBReshape )( int, int );
124 typedef void (* FGCBVisibility )( int );
125 typedef void (* FGCBKeyboard )( unsigned char, int, int );
126 typedef void (* FGCBSpecial )( int, int, int );
127 typedef void (* FGCBMouse )( int, int, int, int );
128 typedef void (* FGCBMouseWheel )( int, int, int, int );
129 typedef void (* FGCBMotion )( int, int );
130 typedef void (* FGCBPassive )( int, int );
131 typedef void (* FGCBEntry )( int );
132 typedef void (* FGCBWindowStatus )( int );
133 typedef void (* FGCBSelect )( int, int, int );
134 typedef void (* FGCBJoystick )( unsigned int, int, int, int );
135 typedef void (* FGCBKeyboardUp )( unsigned char, int, int );
136 typedef void (* FGCBSpecialUp )( int, int, int );
137 typedef void (* FGCBOverlayDisplay)( void );
138 typedef void (* FGCBSpaceMotion )( int, int, int );
139 typedef void (* FGCBSpaceRotation )( int, int, int );
140 typedef void (* FGCBSpaceButton )( int, int );
141 typedef void (* FGCBDials )( int, int );
142 typedef void (* FGCBButtonBox )( int, int );
143 typedef void (* FGCBTabletMotion )( int, int );
144 typedef void (* FGCBTabletButton )( int, int, int, int );
145 typedef void (* FGCBDestroy )( void );
147 /* The global callbacks type definitions */
148 typedef void (* FGCBIdle )( void );
149 typedef void (* FGCBTimer )( int );
150 typedef void (* FGCBMenuState )( int );
151 typedef void (* FGCBMenuStatus )( int, int, int );
153 /* The callback used when creating/using menus */
154 typedef void (* FGCBMenu )( int );
157 /* A list structure */
158 typedef struct tagSFG_List SFG_List;
165 /* A list node structure */
166 typedef struct tagSFG_Node SFG_Node;
173 /* A helper structure holding two ints and a boolean */
174 typedef struct tagSFG_XYUse SFG_XYUse;
177 GLint X, Y; /* The two integers... */
178 GLboolean Use; /* ...and a single boolean. */
181 /* A helper structure holding a timeval and a boolean */
182 typedef struct tagSFG_Time SFG_Time;
185 #if TARGET_HOST_WIN32 || TARGET_HOST_WINCE
188 struct timeval Value;
194 * An enumeration containing the state of the GLUT execution:
195 * initializing, running, or stopping
199 GLUT_EXEC_STATE_INIT,
200 GLUT_EXEC_STATE_RUNNING,
204 /* This structure holds different freeglut settings */
205 typedef struct tagSFG_State SFG_State;
208 SFG_XYUse Position; /* The default windows' position */
209 SFG_XYUse Size; /* The default windows' size */
210 unsigned int DisplayMode; /* Display mode for new windows */
212 GLboolean Initialised; /* freeglut has been initialised */
214 int DirectContext; /* Direct rendering state */
216 GLboolean ForceIconic; /* New top windows are iconified */
217 GLboolean UseCurrentContext; /* New windows share with current */
219 GLboolean GLDebugSwitch; /* OpenGL state debugging switch */
220 GLboolean XSyncSwitch; /* X11 sync protocol switch */
222 int KeyRepeat; /* Global key repeat mode. */
223 int Modifiers; /* Current ALT/SHIFT/CTRL state */
225 GLuint FPSInterval; /* Interval between FPS printfs */
226 GLuint SwapCount; /* Count of glutSwapBuffer calls */
227 GLuint SwapTime; /* Time of last SwapBuffers */
229 SFG_Time Time; /* Time that glutInit was called */
230 SFG_List Timers; /* The freeglut timer hooks */
231 SFG_List FreeTimers; /* The unused timer hooks */
233 FGCBIdle IdleCallback; /* The global idle callback */
235 int ActiveMenus; /* Num. of currently active menus */
236 FGCBMenuState MenuStateCallback; /* Menu callbacks are global */
237 FGCBMenuStatus MenuStatusCallback;
239 SFG_XYUse GameModeSize; /* Game mode screen's dimensions */
240 int GameModeDepth; /* The pixel depth for game mode */
241 int GameModeRefresh; /* The refresh rate for game mode */
243 int ActionOnWindowClose; /* Action when user closes window */
245 fgExecutionState ExecState; /* Used for GLUT termination */
246 char *ProgramName; /* Name of the invoking program */
247 GLboolean JoysticksInitialised; /* Only initialize if application calls for them */
250 /* The structure used by display initialization in freeglut_init.c */
251 typedef struct tagSFG_Display SFG_Display;
252 struct tagSFG_Display
254 #if TARGET_HOST_UNIX_X11
255 Display* Display; /* The display we are being run in. */
256 int Screen; /* The screen we are about to use. */
257 Window RootWindow; /* The screen's root window. */
258 int Connection; /* The display's connection number */
259 Atom DeleteWindow; /* The window deletion atom */
261 #ifdef X_XF86VidModeGetModeLine
263 * XF86VidMode may be compilable even if it fails at runtime. Therefore,
264 * the validity of the VidMode has to be tracked
266 int DisplayModeValid; /* Flag that indicates runtime status*/
267 XF86VidModeModeLine DisplayMode; /* Current screen's display settings */
268 int DisplayModeClock; /* The display mode's refresh rate */
269 int DisplayViewPortX; /* saved X location of the viewport */
270 int DisplayViewPortY; /* saved Y location of the viewport */
271 int DisplayPointerX; /* saved X location of the pointer */
272 int DisplayPointerY; /* saved Y location of the pointer */
276 #elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
277 HINSTANCE Instance; /* The application's instance */
278 DEVMODE DisplayMode; /* Desktop's display settings */
282 int ScreenWidth; /* The screen's width in pixels */
283 int ScreenHeight; /* The screen's height in pixels */
284 int ScreenWidthMM; /* The screen's width in milimeters */
285 int ScreenHeightMM; /* The screen's height in milimeters */
289 /* The user can create any number of timer hooks */
290 typedef struct tagSFG_Timer SFG_Timer;
294 int ID; /* The timer ID integer */
295 FGCBTimer Callback; /* The timer callback */
296 long TriggerTime; /* The timer trigger time */
300 * Make "freeglut" window handle and context types so that we don't need so
301 * much conditionally-compiled code later in the library.
303 #if TARGET_HOST_UNIX_X11
305 typedef Window SFG_WindowHandleType ;
306 typedef GLXContext SFG_WindowContextType ;
308 #elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
310 typedef HWND SFG_WindowHandleType ;
311 typedef HGLRC SFG_WindowContextType ;
316 * A window and its OpenGL context. The contents of this structure
317 * are highly dependant on the target operating system we aim at...
319 typedef struct tagSFG_Context SFG_Context;
320 struct tagSFG_Context
322 SFG_WindowHandleType Handle; /* The window's handle */
323 SFG_WindowContextType Context; /* The window's OpenGL/WGL context */
325 #if TARGET_HOST_UNIX_X11
326 XVisualInfo* VisualInfo; /* The window's visual information */
327 Pixmap Pixmap; /* Used for offscreen rendering */
328 /* GLXPixmap GLXPixMap; */ /* Used for offscreen rendering */
329 #elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
330 HDC Device; /* The window's device context */
333 int DoubleBuffered; /* Treat the window as double-buffered */
336 /* Window's state description. This structure should be kept portable. */
337 typedef struct tagSFG_WindowState SFG_WindowState;
338 struct tagSFG_WindowState
340 int Width; /* Window's width in pixels */
341 int Height; /* The same about the height */
342 int OldWidth; /* Window width from before a resize */
343 int OldHeight; /* " height " " " " */
345 GLboolean Redisplay; /* Do we have to redisplay? */
346 GLboolean Visible; /* Is the window visible now */
348 int Cursor; /* The currently selected cursor */
350 long JoystickPollRate; /* The joystick polling rate */
351 long JoystickLastPoll; /* When the last poll happened */
353 int MouseX, MouseY; /* The most recent mouse position */
355 GLboolean IgnoreKeyRepeat; /* Whether to ignore key repeat. */
356 GLboolean KeyRepeating; /* Currently in repeat mode */
358 GLboolean IsGameMode; /* Is this the game mode window? */
359 GLboolean NeedToResize; /* Do we need to resize the window? */
364 * SET_WCB() is used as:
366 * SET_WCB( window, Visibility, func );
368 * ...where {window} is the freeglut window to set the callback,
369 * {Visibility} is the window-specific callback to set,
370 * {func} is a function-pointer.
372 * Originally, {FETCH_WCB( ... ) = func} was rather sloppily used,
373 * but this can cause warnings because the FETCH_WCB() macro type-
374 * casts its result, and a type-cast value shouldn't be an lvalue.
376 * The {if( FETCH_WCB( ... ) != func )} test is to do type-checking
377 * and for no other reason. Since it's hidden in the macro, the
378 * ugliness is felt to be rather benign.
380 #define SET_WCB(window,cbname,func) \
383 if( FETCH_WCB( window, cbname ) != func ) \
384 (((window).CallBacks[CB_ ## cbname]) = (void *) func); \
388 * FETCH_WCB() is used as:
390 * FETCH_WCB( window, Visibility );
392 * ...where {window} is the freeglut window to fetch the callback from,
393 * {Visibility} is the window-specific callback to fetch.
395 * The result is correctly type-cast to the callback function pointer
398 #define FETCH_WCB(window,cbname) \
399 ((FGCB ## cbname)((window).CallBacks[CB_ ## cbname]))
402 * INVOKE_WCB() is used as:
404 * INVOKE_WCB( window, Visibility, ( status ) );
406 * ...where {window} is the freeglut window,
407 * {Visibility} is the window-specific callback,
408 * {(status)} is the parameter list.
410 * The callback is invoked as:
412 * callback( status );
414 * ...so the parentheses are REQUIRED in the {arg_list}.
416 * NOTE that it does a sanity-check and also sets the
420 #define INVOKE_WCB(window,cbname,arg_list) \
423 if( FETCH_WCB( window, cbname ) ) \
425 fgSetWindow( &window ); \
426 FETCH_WCB( window, cbname ) arg_list; \
431 * The window callbacks the user can supply us with. Should be kept portable.
433 * This enumeration provides the freeglut CallBack numbers.
434 * The symbolic constants are indices into a window's array of
435 * function callbacks. The names are formed by splicing a common
436 * prefix onto the callback's base name. (This was originally
437 * done so that an early stage of development could live side-by-
438 * side with the old callback code. The old callback code used
439 * the bare callback's name as a structure member, so I used a
440 * prefix for the array index name.)
442 * XXX For consistancy, perhaps the prefix should match the
443 * XXX FETCH* and INVOKE* macro suffices. I.e., WCB_, rather than
464 /* Presently ignored */
475 /* Always make this the LAST one */
480 /* This structure holds the OpenGL rendering context for all the menu windows */
481 typedef struct tagSFG_MenuContext SFG_MenuContext;
482 struct tagSFG_MenuContext
484 #if TARGET_HOST_UNIX_X11
485 XVisualInfo* VisualInfo; /* The window's visual information */
488 SFG_WindowContextType Context; /* The menu window's WGL context */
491 /* This structure describes a menu */
492 typedef struct tagSFG_Window SFG_Window;
493 typedef struct tagSFG_MenuEntry SFG_MenuEntry;
494 typedef struct tagSFG_Menu SFG_Menu;
498 void *UserData; /* User data passed back at callback */
499 int ID; /* The global menu ID */
500 SFG_List Entries; /* The menu entries list */
501 FGCBMenu Callback; /* The menu callback */
502 FGCBDestroy Destroy; /* Destruction callback */
503 GLboolean IsActive; /* Is the menu selected? */
504 int Width; /* Menu box width in pixels */
505 int Height; /* Menu box height in pixels */
506 int X, Y; /* Menu box raster position */
508 SFG_MenuEntry *ActiveEntry; /* Currently active entry in the menu */
509 SFG_Window *Window; /* Window for menu */
510 SFG_Window *ParentWindow; /* Window in which the menu is defined */
513 /* This is a menu entry */
514 struct tagSFG_MenuEntry
517 int ID; /* The menu entry ID (local) */
518 int Ordinal; /* The menu's ordinal number */
519 char* Text; /* The text to be displayed */
520 SFG_Menu* SubMenu; /* Optional sub-menu tree */
521 GLboolean IsActive; /* Is the entry highlighted? */
522 int Width; /* Label's width in pixels */
526 * A window, making part of freeglut windows hierarchy.
527 * Should be kept portable.
532 int ID; /* Window's ID number */
534 SFG_Context Window; /* Window and OpenGL context */
535 SFG_WindowState State; /* The window state */
536 void *CallBacks[ TOTAL_CALLBACKS ]; /* Array of window callbacks */
537 void *UserData ; /* For use by user */
539 SFG_Menu* Menu[ FREEGLUT_MAX_MENUS ]; /* Menus appended to window */
540 SFG_Menu* ActiveMenu; /* The window's active menu */
542 SFG_Window* Parent; /* The parent to this window */
543 SFG_List Children; /* The subwindows d.l. list */
545 GLboolean IsMenu; /* Set to 1 if we are a menu */
549 /* A linked list structure of windows */
550 typedef struct tagSFG_WindowList SFG_WindowList ;
551 struct tagSFG_WindowList
557 /* This holds information about all the windows, menus etc. */
558 typedef struct tagSFG_Structure SFG_Structure;
559 struct tagSFG_Structure
561 SFG_List Windows; /* The global windows list */
562 SFG_List Menus; /* The global menus list */
563 SFG_List WindowsToDestroy;
565 SFG_Window* Window; /* The currently active win. */
566 SFG_Menu* Menu; /* Same, but menu... */
568 SFG_MenuContext* MenuContext; /* OpenGL rendering context for menus */
570 SFG_Window* GameMode; /* The game mode window */
572 int WindowID; /* The new current window ID */
573 int MenuID; /* The new current menu ID */
577 * This structure is used for the enumeration purposes.
578 * You can easily extend its functionalities by declaring
579 * a structure containing enumerator's contents and custom
580 * data, then casting its pointer to (SFG_Enumerator *).
582 typedef struct tagSFG_Enumerator SFG_Enumerator;
583 struct tagSFG_Enumerator
585 GLboolean found; /* Used to terminate search */
586 void* data; /* Custom data pointer */
588 typedef void (* FGCBenumerator )( SFG_Window *, SFG_Enumerator * );
590 /* The bitmap font structure */
591 typedef struct tagSFG_Font SFG_Font;
594 char* Name; /* The source font name */
595 int Quantity; /* Number of chars in font */
596 int Height; /* Height of the characters */
597 const GLubyte** Characters; /* The characters mapping */
599 float xorig, yorig; /* Relative origin of the character */
602 /* The stroke font structures */
604 typedef struct tagSFG_StrokeVertex SFG_StrokeVertex;
605 struct tagSFG_StrokeVertex
610 typedef struct tagSFG_StrokeStrip SFG_StrokeStrip;
611 struct tagSFG_StrokeStrip
614 const SFG_StrokeVertex* Vertices;
617 typedef struct tagSFG_StrokeChar SFG_StrokeChar;
618 struct tagSFG_StrokeChar
622 const SFG_StrokeStrip* Strips;
625 typedef struct tagSFG_StrokeFont SFG_StrokeFont;
626 struct tagSFG_StrokeFont
628 char* Name; /* The source font name */
629 int Quantity; /* Number of chars in font */
630 GLfloat Height; /* Height of the characters */
631 const SFG_StrokeChar** Characters; /* The characters mapping */
634 /* -- GLOBAL VARIABLES EXPORTS --------------------------------------------- */
636 /* Freeglut display related stuff (initialized once per session) */
637 extern SFG_Display fgDisplay;
639 /* Freeglut internal structure */
640 extern SFG_Structure fgStructure;
642 /* The current freeglut settings */
643 extern SFG_State fgState;
646 /* -- PRIVATE FUNCTION DECLARATIONS ---------------------------------------- */
649 * A call to this function makes us sure that the Display and Structure
650 * subsystems have been properly initialized and are ready to be used
652 #define FREEGLUT_EXIT_IF_NOT_INITIALISED( string ) \
653 if ( ! fgState.Initialised ) \
655 fgError ( " ERROR: Function <%s> called" \
656 " without first calling 'glutInit'.", (string) ) ; \
659 #define FREEGLUT_INTERNAL_ERROR_EXIT_IF_NOT_INITIALISED( string ) \
660 if ( ! fgState.Initialised ) \
662 fgError ( " ERROR: Internal <%s> function called" \
663 " without first calling 'glutInit'.", (string) ) ; \
666 #define FREEGLUT_INTERNAL_ERROR_EXIT( cond, string, function ) \
669 fgError ( " ERROR: Internal error <%s> in function %s", \
670 (string), (function) ) ; \
674 * Following definitions are somewhat similiar to GLib's,
675 * but do not generate any log messages:
677 #define freeglut_return_if_fail( expr ) \
680 #define freeglut_return_val_if_fail( expr, val ) \
685 * A call to those macros assures us that there is a current
686 * window set, respectively:
688 #define FREEGLUT_EXIT_IF_NO_WINDOW( string ) \
689 if ( ! fgStructure.Window ) \
691 fgError ( " ERROR: Function <%s> called" \
692 " with no current window defined.", (string) ) ; \
696 * The deinitialize function gets called on glutMainLoop() end. It should clean up
697 * everything inside of the freeglut
699 void fgDeinitialize( void );
702 * Those two functions are used to create/destroy the freeglut internal
703 * structures. This actually happens when calling glutInit() and when
704 * quitting the glutMainLoop() (which actually happens, when all windows
707 void fgCreateStructure( void );
708 void fgDestroyStructure( void );
710 /* A helper function to check if a display mode is possible to use */
711 #if TARGET_HOST_UNIX_X11
712 XVisualInfo* fgChooseVisual( void );
715 /* The window procedure for Win32 events handling */
716 #if TARGET_HOST_WIN32 || TARGET_HOST_WINCE
717 LRESULT CALLBACK fgWindowProc( HWND hWnd, UINT uMsg,
718 WPARAM wParam, LPARAM lParam );
719 GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly,
720 unsigned char layer_type );
724 * Window creation, opening, closing and destruction.
725 * Also CallBack clearing/initialization.
726 * Defined in freeglut_structure.c, freeglut_window.c.
728 SFG_Window* fgCreateWindow( SFG_Window* parent, const char* title,
729 int x, int y, int w, int h,
730 GLboolean gameMode, GLboolean isMenu );
731 void fgSetWindow ( SFG_Window *window );
732 void fgOpenWindow( SFG_Window* window, const char* title,
733 int x, int y, int w, int h, GLboolean gameMode,
734 GLboolean isSubWindow );
735 void fgCloseWindow( SFG_Window* window );
736 void fgAddToWindowDestroyList ( SFG_Window* window );
737 void fgCloseWindows ();
738 void fgDestroyWindow( SFG_Window* window );
740 /* Menu creation and destruction. Defined in freeglut_structure.c */
741 SFG_Menu* fgCreateMenu( FGCBMenu menuCallback );
742 void fgDestroyMenu( SFG_Menu* menu );
744 /* Joystick device management functions, defined in freeglut_joystick.c */
745 int fgJoystickDetect( void );
746 void fgInitialiseJoysticks( void );
747 void fgJoystickClose( void );
748 void fgJoystickPollWindow( SFG_Window* window );
750 /* More joystick functions. Should these go into the API? */
751 int glutJoystickGetNumAxes( int ident );
752 int glutJoystickGetNumButtons( int ident );
753 int glutJoystickNotWorking( int ident );
756 * Helper function to enumerate through all registered windows
757 * and one to enumerate all of a window's subwindows...
759 * The GFunc callback for those functions will be defined as:
761 * void enumCallback( gpointer window, gpointer enumerator );
763 * where window is the enumerated (sub)window pointer (SFG_Window *),
764 * and userData is the a custom user-supplied pointer. Functions
765 * are defined and exported from freeglut_structure.c file.
767 void fgEnumWindows( FGCBenumerator enumCallback, SFG_Enumerator* enumerator );
768 void fgEnumSubWindows( SFG_Window* window, FGCBenumerator enumCallback,
769 SFG_Enumerator* enumerator );
772 * fgWindowByHandle returns a (SFG_Window *) value pointing to the
773 * first window in the queue matching the specified window handle.
774 * The function is defined in freeglut_structure.c file.
776 SFG_Window* fgWindowByHandle( SFG_WindowHandleType hWindow );
779 * This function is similiar to the previous one, except it is
780 * looking for a specified (sub)window identifier. The function
781 * is defined in freeglut_structure.c file.
783 SFG_Window* fgWindowByID( int windowID );
786 * Looks up a menu given its ID. This is easier than fgWindowByXXX
787 * as all menus are placed in a single doubly linked list...
789 SFG_Menu* fgMenuByID( int menuID );
792 * The menu activation and deactivation the code. This is the meat
793 * of the menu user interface handling code...
795 void fgActivateMenu( SFG_Window* window, int button );
796 GLboolean fgCheckActiveMenu ( SFG_Window *window, int button, GLboolean pressed,
797 int mouse_x, int mouse_y );
798 void fgDeactivateMenu( SFG_Window *window );
799 void fgDeactivateSubMenu( SFG_MenuEntry *menuEntry );
802 * This function gets called just before the buffers swap, so that
803 * freeglut can display the pull-down menus via OpenGL. The function
804 * is defined in freeglut_menu.c file.
806 void fgDisplayMenu( void );
809 * Display the mouse cursor using OpenGL calls. The function
810 * is defined in freeglut_cursor.c file.
812 void fgDisplayCursor( void );
814 /* Elapsed time as per glutGet(GLUT_ELAPSED_TIME). */
815 long fgElapsedTime( void );
818 void fgListInit(SFG_List *list);
819 void fgListAppend(SFG_List *list, SFG_Node *node);
820 void fgListRemove(SFG_List *list, SFG_Node *node);
821 int fgListLength(SFG_List *list);
822 void fgListInsert(SFG_List *list, SFG_Node *next, SFG_Node *node);
824 /* Error Message functions */
825 void fgError( const char *fmt, ... );
826 void fgWarning( const char *fmt, ... );
828 #endif /* FREEGLUT_INTERNAL_H */
830 /*** END OF FILE ***/