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 # include <sys/types.h>
82 #if TIME_WITH_SYS_TIME
83 # include <sys/time.h>
87 # include <sys/time.h>
93 /* The system-dependant include files should go here: */
94 #if TARGET_HOST_UNIX_X11
97 #include <X11/Xatom.h>
98 #include <X11/keysym.h>
100 #ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
101 #include <X11/extensions/xf86vmode.h>
105 /* Microsoft VisualC++ 5.0's <math.h> does not define the PI */
107 # define M_PI 3.14159265358979323846
118 /* -- GLOBAL TYPE DEFINITIONS ---------------------------------------------- */
120 /* Freeglut callbacks type definitions */
121 typedef void (* FGCBDisplay )( void );
122 typedef void (* FGCBReshape )( int, int );
123 typedef void (* FGCBVisibility )( int );
124 typedef void (* FGCBKeyboard )( unsigned char, int, int );
125 typedef void (* FGCBSpecial )( int, int, int );
126 typedef void (* FGCBMouse )( int, int, int, int );
127 typedef void (* FGCBMouseWheel )( int, int, int, int );
128 typedef void (* FGCBMotion )( int, int );
129 typedef void (* FGCBPassive )( int, int );
130 typedef void (* FGCBEntry )( int );
131 typedef void (* FGCBWindowStatus )( int );
132 typedef void (* FGCBSelect )( int, int, int );
133 typedef void (* FGCBJoystick )( unsigned int, int, int, int );
134 typedef void (* FGCBKeyboardUp )( unsigned char, int, int );
135 typedef void (* FGCBSpecialUp )( int, int, int );
136 typedef void (* FGCBOverlayDisplay)( void );
137 typedef void (* FGCBSpaceMotion )( int, int, int );
138 typedef void (* FGCBSpaceRotation )( int, int, int );
139 typedef void (* FGCBSpaceButton )( int, int );
140 typedef void (* FGCBDials )( int, int );
141 typedef void (* FGCBButtonBox )( int, int );
142 typedef void (* FGCBTabletMotion )( int, int );
143 typedef void (* FGCBTabletButton )( int, int, int, int );
144 typedef void (* FGCBDestroy )( void );
146 /* The global callbacks type definitions */
147 typedef void (* FGCBIdle )( void );
148 typedef void (* FGCBTimer )( int );
149 typedef void (* FGCBMenuState )( int );
150 typedef void (* FGCBMenuStatus )( int, int, int );
152 /* The callback used when creating/using menus */
153 typedef void (* FGCBMenu )( int );
156 /* A list structure */
157 typedef struct tagSFG_List SFG_List;
164 /* A list node structure */
165 typedef struct tagSFG_Node SFG_Node;
172 /* A helper structure holding two ints and a boolean */
173 typedef struct tagSFG_XYUse SFG_XYUse;
176 GLint X, Y; /* The two integers... */
177 GLboolean Use; /* ...and a single boolean. */
180 /* A helper structure holding a timeval and a boolean */
181 typedef struct tagSFG_Time SFG_Time;
184 #if TARGET_HOST_WIN32 || TARGET_HOST_WINCE
187 struct timeval Value;
193 * An enumeration containing the state of the GLUT execution:
194 * initializing, running, or stopping
198 GLUT_EXEC_STATE_INIT,
199 GLUT_EXEC_STATE_RUNNING,
203 /* This structure holds different freeglut settings */
204 typedef struct tagSFG_State SFG_State;
207 SFG_XYUse Position; /* The default windows' position */
208 SFG_XYUse Size; /* The default windows' size */
209 unsigned int DisplayMode; /* Display mode for new windows */
211 GLboolean Initialised; /* freeglut has been initialised */
213 int DirectContext; /* Direct rendering state */
215 GLboolean ForceIconic; /* New top windows are iconified */
216 GLboolean UseCurrentContext; /* New windows share with current */
218 GLboolean GLDebugSwitch; /* OpenGL state debugging switch */
219 GLboolean XSyncSwitch; /* X11 sync protocol switch */
221 int KeyRepeat; /* Global key repeat mode. */
222 int Modifiers; /* Current ALT/SHIFT/CTRL state */
224 GLuint FPSInterval; /* Interval between FPS printfs */
225 GLuint SwapCount; /* Count of glutSwapBuffer calls */
226 GLuint SwapTime; /* Time of last SwapBuffers */
228 SFG_Time Time; /* Time that glutInit was called */
229 SFG_List Timers; /* The freeglut timer hooks */
230 SFG_List FreeTimers; /* The unused timer hooks */
232 FGCBIdle IdleCallback; /* The global idle callback */
234 int ActiveMenus; /* Num. of currently active menus */
235 FGCBMenuState MenuStateCallback; /* Menu callbacks are global */
236 FGCBMenuStatus MenuStatusCallback;
238 SFG_XYUse GameModeSize; /* Game mode screen's dimensions */
239 int GameModeDepth; /* The pixel depth for game mode */
240 int GameModeRefresh; /* The refresh rate for game mode */
242 int ActionOnWindowClose; /* Action when user closes window */
244 fgExecutionState ExecState; /* Used for GLUT termination */
245 char *ProgramName; /* Name of the invoking program */
246 GLboolean JoysticksInitialised; /* Only initialize if application calls for them */
249 /* The structure used by display initialization in freeglut_init.c */
250 typedef struct tagSFG_Display SFG_Display;
251 struct tagSFG_Display
253 #if TARGET_HOST_UNIX_X11
254 Display* Display; /* The display we are being run in. */
255 int Screen; /* The screen we are about to use. */
256 Window RootWindow; /* The screen's root window. */
257 int Connection; /* The display's connection number */
258 Atom DeleteWindow; /* The window deletion atom */
260 #ifdef X_XF86VidModeGetModeLine
262 * XF86VidMode may be compilable even if it fails at runtime. Therefore,
263 * the validity of the VidMode has to be tracked
265 int DisplayModeValid; /* Flag that indicates runtime status*/
266 XF86VidModeModeLine DisplayMode; /* Current screen's display settings */
267 int DisplayModeClock; /* The display mode's refresh rate */
268 int DisplayViewPortX; /* saved X location of the viewport */
269 int DisplayViewPortY; /* saved Y location of the viewport */
270 int DisplayPointerX; /* saved X location of the pointer */
271 int DisplayPointerY; /* saved Y location of the pointer */
275 #elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
276 HINSTANCE Instance; /* The application's instance */
277 DEVMODE DisplayMode; /* Desktop's display settings */
281 int ScreenWidth; /* The screen's width in pixels */
282 int ScreenHeight; /* The screen's height in pixels */
283 int ScreenWidthMM; /* The screen's width in milimeters */
284 int ScreenHeightMM; /* The screen's height in milimeters */
288 /* The user can create any number of timer hooks */
289 typedef struct tagSFG_Timer SFG_Timer;
293 int ID; /* The timer ID integer */
294 FGCBTimer Callback; /* The timer callback */
295 long TriggerTime; /* The timer trigger time */
299 * Make "freeglut" window handle and context types so that we don't need so
300 * much conditionally-compiled code later in the library.
302 #if TARGET_HOST_UNIX_X11
304 typedef Window SFG_WindowHandleType ;
305 typedef GLXContext SFG_WindowContextType ;
307 #elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
309 typedef HWND SFG_WindowHandleType ;
310 typedef HGLRC SFG_WindowContextType ;
315 * A window and its OpenGL context. The contents of this structure
316 * are highly dependant on the target operating system we aim at...
318 typedef struct tagSFG_Context SFG_Context;
319 struct tagSFG_Context
321 SFG_WindowHandleType Handle; /* The window's handle */
322 SFG_WindowContextType Context; /* The window's OpenGL/WGL context */
324 #if TARGET_HOST_UNIX_X11
325 XVisualInfo* VisualInfo; /* The window's visual information */
326 Pixmap Pixmap; /* Used for offscreen rendering */
327 /* GLXPixmap GLXPixMap; */ /* Used for offscreen rendering */
328 #elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
329 HDC Device; /* The window's device context */
332 int DoubleBuffered; /* Treat the window as double-buffered */
335 /* Window's state description. This structure should be kept portable. */
336 typedef struct tagSFG_WindowState SFG_WindowState;
337 struct tagSFG_WindowState
339 int Width; /* Window's width in pixels */
340 int Height; /* The same about the height */
341 int OldWidth; /* Window width from before a resize */
342 int OldHeight; /* " height " " " " */
344 GLboolean Redisplay; /* Do we have to redisplay? */
345 GLboolean Visible; /* Is the window visible now */
347 int Cursor; /* The currently selected cursor */
349 long JoystickPollRate; /* The joystick polling rate */
350 long JoystickLastPoll; /* When the last poll happened */
352 int MouseX, MouseY; /* The most recent mouse position */
354 GLboolean IgnoreKeyRepeat; /* Whether to ignore key repeat. */
355 GLboolean KeyRepeating; /* Currently in repeat mode */
357 GLboolean IsGameMode; /* Is this the game mode window? */
358 GLboolean NeedToResize; /* Do we need to resize the window? */
363 * SET_WCB() is used as:
365 * SET_WCB( window, Visibility, func );
367 * ...where {window} is the freeglut window to set the callback,
368 * {Visibility} is the window-specific callback to set,
369 * {func} is a function-pointer.
371 * Originally, {FETCH_WCB( ... ) = func} was rather sloppily used,
372 * but this can cause warnings because the FETCH_WCB() macro type-
373 * casts its result, and a type-cast value shouldn't be an lvalue.
375 * The {if( FETCH_WCB( ... ) != func )} test is to do type-checking
376 * and for no other reason. Since it's hidden in the macro, the
377 * ugliness is felt to be rather benign.
379 #define SET_WCB(window,cbname,func) \
382 if( FETCH_WCB( window, cbname ) != func ) \
383 (((window).CallBacks[CB_ ## cbname]) = (void *) func); \
387 * FETCH_WCB() is used as:
389 * FETCH_WCB( window, Visibility );
391 * ...where {window} is the freeglut window to fetch the callback from,
392 * {Visibility} is the window-specific callback to fetch.
394 * The result is correctly type-cast to the callback function pointer
397 #define FETCH_WCB(window,cbname) \
398 ((FGCB ## cbname)((window).CallBacks[CB_ ## cbname]))
401 * INVOKE_WCB() is used as:
403 * INVOKE_WCB( window, Visibility, ( status ) );
405 * ...where {window} is the freeglut window,
406 * {Visibility} is the window-specific callback,
407 * {(status)} is the parameter list.
409 * The callback is invoked as:
411 * callback( status );
413 * ...so the parentheses are REQUIRED in the {arg_list}.
415 * NOTE that it does a sanity-check and also sets the
419 #define INVOKE_WCB(window,cbname,arg_list) \
422 if( FETCH_WCB( window, cbname ) ) \
424 fgSetWindow( &window ); \
425 FETCH_WCB( window, cbname ) arg_list; \
430 * The window callbacks the user can supply us with. Should be kept portable.
432 * This enumeration provides the freeglut CallBack numbers.
433 * The symbolic constants are indices into a window's array of
434 * function callbacks. The names are formed by splicing a common
435 * prefix onto the callback's base name. (This was originally
436 * done so that an early stage of development could live side-by-
437 * side with the old callback code. The old callback code used
438 * the bare callback's name as a structure member, so I used a
439 * prefix for the array index name.)
441 * XXX For consistancy, perhaps the prefix should match the
442 * XXX FETCH* and INVOKE* macro suffices. I.e., WCB_, rather than
463 /* Presently ignored */
474 /* Always make this the LAST one */
479 /* This structure holds the OpenGL rendering context for all the menu windows */
480 typedef struct tagSFG_MenuContext SFG_MenuContext;
481 struct tagSFG_MenuContext
483 #if TARGET_HOST_UNIX_X11
484 XVisualInfo* VisualInfo; /* The window's visual information */
487 SFG_WindowContextType Context; /* The menu window's WGL context */
490 /* This structure describes a menu */
491 typedef struct tagSFG_Window SFG_Window;
492 typedef struct tagSFG_MenuEntry SFG_MenuEntry;
493 typedef struct tagSFG_Menu SFG_Menu;
497 void *UserData; /* User data passed back at callback */
498 int ID; /* The global menu ID */
499 SFG_List Entries; /* The menu entries list */
500 FGCBMenu Callback; /* The menu callback */
501 FGCBDestroy Destroy; /* Destruction callback */
502 GLboolean IsActive; /* Is the menu selected? */
503 int Width; /* Menu box width in pixels */
504 int Height; /* Menu box height in pixels */
505 int X, Y; /* Menu box raster position */
507 SFG_MenuEntry *ActiveEntry; /* Currently active entry in the menu */
508 SFG_Window *Window; /* Window for menu */
509 SFG_Window *ParentWindow; /* Window in which the menu is defined */
512 /* This is a menu entry */
513 struct tagSFG_MenuEntry
516 int ID; /* The menu entry ID (local) */
517 int Ordinal; /* The menu's ordinal number */
518 char* Text; /* The text to be displayed */
519 SFG_Menu* SubMenu; /* Optional sub-menu tree */
520 GLboolean IsActive; /* Is the entry highlighted? */
521 int Width; /* Label's width in pixels */
525 * A window, making part of freeglut windows hierarchy.
526 * Should be kept portable.
531 int ID; /* Window's ID number */
533 SFG_Context Window; /* Window and OpenGL context */
534 SFG_WindowState State; /* The window state */
535 void *CallBacks[ TOTAL_CALLBACKS ]; /* Array of window callbacks */
536 void *UserData ; /* For use by user */
538 SFG_Menu* Menu[ FREEGLUT_MAX_MENUS ]; /* Menus appended to window */
539 SFG_Menu* ActiveMenu; /* The window's active menu */
541 SFG_Window* Parent; /* The parent to this window */
542 SFG_List Children; /* The subwindows d.l. list */
544 GLboolean IsMenu; /* Set to 1 if we are a menu */
548 /* A linked list structure of windows */
549 typedef struct tagSFG_WindowList SFG_WindowList ;
550 struct tagSFG_WindowList
556 /* This holds information about all the windows, menus etc. */
557 typedef struct tagSFG_Structure SFG_Structure;
558 struct tagSFG_Structure
560 SFG_List Windows; /* The global windows list */
561 SFG_List Menus; /* The global menus list */
562 SFG_List WindowsToDestroy;
564 SFG_Window* Window; /* The currently active win. */
565 SFG_Menu* Menu; /* Same, but menu... */
567 SFG_MenuContext* MenuContext; /* OpenGL rendering context for menus */
569 SFG_Window* GameMode; /* The game mode window */
571 int WindowID; /* The new current window ID */
572 int MenuID; /* The new current menu ID */
576 * This structure is used for the enumeration purposes.
577 * You can easily extend its functionalities by declaring
578 * a structure containing enumerator's contents and custom
579 * data, then casting its pointer to (SFG_Enumerator *).
581 typedef struct tagSFG_Enumerator SFG_Enumerator;
582 struct tagSFG_Enumerator
584 GLboolean found; /* Used to terminate search */
585 void* data; /* Custom data pointer */
587 typedef void (* FGCBenumerator )( SFG_Window *, SFG_Enumerator * );
589 /* The bitmap font structure */
590 typedef struct tagSFG_Font SFG_Font;
593 char* Name; /* The source font name */
594 int Quantity; /* Number of chars in font */
595 int Height; /* Height of the characters */
596 const GLubyte** Characters; /* The characters mapping */
598 float xorig, yorig; /* Relative origin of the character */
601 /* The stroke font structures */
603 typedef struct tagSFG_StrokeVertex SFG_StrokeVertex;
604 struct tagSFG_StrokeVertex
609 typedef struct tagSFG_StrokeStrip SFG_StrokeStrip;
610 struct tagSFG_StrokeStrip
613 const SFG_StrokeVertex* Vertices;
616 typedef struct tagSFG_StrokeChar SFG_StrokeChar;
617 struct tagSFG_StrokeChar
621 const SFG_StrokeStrip* Strips;
624 typedef struct tagSFG_StrokeFont SFG_StrokeFont;
625 struct tagSFG_StrokeFont
627 char* Name; /* The source font name */
628 int Quantity; /* Number of chars in font */
629 GLfloat Height; /* Height of the characters */
630 const SFG_StrokeChar** Characters; /* The characters mapping */
633 /* -- GLOBAL VARIABLES EXPORTS --------------------------------------------- */
635 /* Freeglut display related stuff (initialized once per session) */
636 extern SFG_Display fgDisplay;
638 /* Freeglut internal structure */
639 extern SFG_Structure fgStructure;
641 /* The current freeglut settings */
642 extern SFG_State fgState;
645 /* -- PRIVATE FUNCTION DECLARATIONS ---------------------------------------- */
648 * A call to this function makes us sure that the Display and Structure
649 * subsystems have been properly initialized and are ready to be used
651 #define FREEGLUT_EXIT_IF_NOT_INITIALISED( string ) \
652 if ( ! fgState.Initialised ) \
654 fgError ( " ERROR: Function <%s> called" \
655 " without first calling 'glutInit'.", (string) ) ; \
658 #define FREEGLUT_INTERNAL_ERROR_EXIT_IF_NOT_INITIALISED( string ) \
659 if ( ! fgState.Initialised ) \
661 fgError ( " ERROR: Internal <%s> function called" \
662 " without first calling 'glutInit'.", (string) ) ; \
665 #define FREEGLUT_INTERNAL_ERROR_EXIT( cond, string, function ) \
668 fgError ( " ERROR: Internal error <%s> in function %s", \
669 (string), (function) ) ; \
673 * Following definitions are somewhat similiar to GLib's,
674 * but do not generate any log messages:
676 #define freeglut_return_if_fail( expr ) \
679 #define freeglut_return_val_if_fail( expr, val ) \
684 * A call to those macros assures us that there is a current
685 * window set, respectively:
687 #define FREEGLUT_EXIT_IF_NO_WINDOW( string ) \
688 if ( ! fgStructure.Window ) \
690 fgError ( " ERROR: Function <%s> called" \
691 " with no current window defined.", (string) ) ; \
695 * The deinitialize function gets called on glutMainLoop() end. It should clean up
696 * everything inside of the freeglut
698 void fgDeinitialize( void );
701 * Those two functions are used to create/destroy the freeglut internal
702 * structures. This actually happens when calling glutInit() and when
703 * quitting the glutMainLoop() (which actually happens, when all windows
706 void fgCreateStructure( void );
707 void fgDestroyStructure( void );
709 /* A helper function to check if a display mode is possible to use */
710 #if TARGET_HOST_UNIX_X11
711 XVisualInfo* fgChooseVisual( void );
714 /* The window procedure for Win32 events handling */
715 #if TARGET_HOST_WIN32 || TARGET_HOST_WINCE
716 LRESULT CALLBACK fgWindowProc( HWND hWnd, UINT uMsg,
717 WPARAM wParam, LPARAM lParam );
718 GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly,
719 unsigned char layer_type );
723 * Window creation, opening, closing and destruction.
724 * Also CallBack clearing/initialization.
725 * Defined in freeglut_structure.c, freeglut_window.c.
727 SFG_Window* fgCreateWindow( SFG_Window* parent, const char* title,
728 int x, int y, int w, int h,
729 GLboolean gameMode, GLboolean isMenu );
730 void fgSetWindow ( SFG_Window *window );
731 void fgOpenWindow( SFG_Window* window, const char* title,
732 int x, int y, int w, int h, GLboolean gameMode,
733 GLboolean isSubWindow );
734 void fgCloseWindow( SFG_Window* window );
735 void fgAddToWindowDestroyList ( SFG_Window* window );
736 void fgCloseWindows ();
737 void fgDestroyWindow( SFG_Window* window );
739 /* Menu creation and destruction. Defined in freeglut_structure.c */
740 SFG_Menu* fgCreateMenu( FGCBMenu menuCallback );
741 void fgDestroyMenu( SFG_Menu* menu );
743 /* Joystick device management functions, defined in freeglut_joystick.c */
744 int fgJoystickDetect( void );
745 void fgInitialiseJoysticks( void );
746 void fgJoystickClose( void );
747 void fgJoystickPollWindow( SFG_Window* window );
749 /* More joystick functions. Should these go into the API? */
750 int glutJoystickGetNumAxes( int ident );
751 int glutJoystickGetNumButtons( int ident );
752 int glutJoystickNotWorking( int ident );
755 * Helper function to enumerate through all registered windows
756 * and one to enumerate all of a window's subwindows...
758 * The GFunc callback for those functions will be defined as:
760 * void enumCallback( gpointer window, gpointer enumerator );
762 * where window is the enumerated (sub)window pointer (SFG_Window *),
763 * and userData is the a custom user-supplied pointer. Functions
764 * are defined and exported from freeglut_structure.c file.
766 void fgEnumWindows( FGCBenumerator enumCallback, SFG_Enumerator* enumerator );
767 void fgEnumSubWindows( SFG_Window* window, FGCBenumerator enumCallback,
768 SFG_Enumerator* enumerator );
771 * fgWindowByHandle returns a (SFG_Window *) value pointing to the
772 * first window in the queue matching the specified window handle.
773 * The function is defined in freeglut_structure.c file.
775 SFG_Window* fgWindowByHandle( SFG_WindowHandleType hWindow );
778 * This function is similiar to the previous one, except it is
779 * looking for a specified (sub)window identifier. The function
780 * is defined in freeglut_structure.c file.
782 SFG_Window* fgWindowByID( int windowID );
785 * Looks up a menu given its ID. This is easier than fgWindowByXXX
786 * as all menus are placed in a single doubly linked list...
788 SFG_Menu* fgMenuByID( int menuID );
791 * The menu activation and deactivation the code. This is the meat
792 * of the menu user interface handling code...
794 void fgActivateMenu( SFG_Window* window, int button );
795 GLboolean fgCheckActiveMenu ( SFG_Window *window, int button, GLboolean pressed,
796 int mouse_x, int mouse_y );
797 void fgDeactivateMenu( SFG_Window *window );
798 void fgDeactivateSubMenu( SFG_MenuEntry *menuEntry );
801 * This function gets called just before the buffers swap, so that
802 * freeglut can display the pull-down menus via OpenGL. The function
803 * is defined in freeglut_menu.c file.
805 void fgDisplayMenu( void );
808 * Display the mouse cursor using OpenGL calls. The function
809 * is defined in freeglut_cursor.c file.
811 void fgDisplayCursor( void );
813 /* Elapsed time as per glutGet(GLUT_ELAPSED_TIME). */
814 long fgElapsedTime( void );
817 void fgListInit(SFG_List *list);
818 void fgListAppend(SFG_List *list, SFG_Node *node);
819 void fgListRemove(SFG_List *list, SFG_Node *node);
820 int fgListLength(SFG_List *list);
821 void fgListInsert(SFG_List *list, SFG_Node *next, SFG_Node *node);
823 /* Error Message functions */
824 void fgError( const char *fmt, ... );
825 void fgWarning( const char *fmt, ... );
827 #endif /* FREEGLUT_INTERNAL_H */
829 /*** END OF FILE ***/