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
31 /* XXX Update these for each release! */
32 #define VERSION_MAJOR 2
33 #define VERSION_MINOR 0
34 #define VERSION_PATCH 0
37 * Freeglut is meant to be available under all Unix/X11 and Win32 platforms.
40 # define TARGET_HOST_UNIX_X11 1
41 # define TARGET_HOST_WIN32 0
43 # define TARGET_HOST_UNIX_X11 0
44 # define TARGET_HOST_WIN32 1
47 #define FREEGLUT_MAX_MENUS 3
48 #define FREEGLUT_DEBUG 1
51 #undef G_DISABLE_ASSERT
52 #undef G_DISABLE_CHECKS
54 #define G_DISABLE_ASSERT
55 #define G_DISABLE_CHECKS
59 * Somehow all Win32 include headers depend on this one:
65 #define strdup _strdup
69 * Those files should be available on every platform.
79 #if TARGET_HOST_UNIX_X11
84 * The system-dependant include files should go here:
86 #if TARGET_HOST_UNIX_X11
89 #include <X11/Xatom.h>
90 #include <X11/keysym.h>
92 #ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
93 #include <X11/extensions/xf86vmode.h>
98 * Microsoft VisualC++ 5.0's <math.h> does not define the PI
101 # define M_PI 3.14159265358979323846
112 /* -- GLOBAL TYPE DEFINITIONS ---------------------------------------------- */
115 * Freeglut callbacks type definitions
117 typedef void (* FGCBDisplay )( void );
118 typedef void (* FGCBReshape )( int, int );
119 typedef void (* FGCBVisibility )( int );
120 typedef void (* FGCBKeyboard )( unsigned char, int, int );
121 typedef void (* FGCBSpecial )( int, int, int );
122 typedef void (* FGCBMouse )( int, int, int, int );
123 typedef void (* FGCBMouseWheel )( int, int, int, int );
124 typedef void (* FGCBMotion )( int, int );
125 typedef void (* FGCBPassive )( int, int );
126 typedef void (* FGCBEntry )( int );
127 typedef void (* FGCBWindowStatus )( int );
128 typedef void (* FGCBSelect )( int, int, int );
129 typedef void (* FGCBJoystick )( unsigned int, int, int, int );
130 typedef void (* FGCBKeyboardUp )( unsigned char, int, int );
131 typedef void (* FGCBSpecialUp )( int, int, int );
132 typedef void (* FGCBOverlayDisplay)( void );
133 typedef void (* FGCBSpaceMotion )( int, int, int );
134 typedef void (* FGCBSpaceRotation )( int, int, int );
135 typedef void (* FGCBSpaceButton )( int, int );
136 typedef void (* FGCBDials )( int, int );
137 typedef void (* FGCBButtonBox )( int, int );
138 typedef void (* FGCBTabletMotion )( int, int );
139 typedef void (* FGCBTabletButton )( int, int, int, int );
140 typedef void (* FGCBDestroy )( void );
143 * 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 );
151 * The callback used when creating/using menus
153 typedef void (* FGCBMenu )( int );
159 typedef struct tagSFG_List SFG_List;
167 * A list node structure
169 typedef struct tagSFG_Node SFG_Node;
177 * A helper structure holding two ints and a boolean
179 typedef struct tagSFG_XYUse SFG_XYUse;
182 GLint X, Y; /* The two integers... */
183 GLboolean Use; /* ...and a single boolean. */
187 * A helper structure holding a timeval and a boolean
189 typedef struct tagSFG_Time SFG_Time;
195 struct timeval Value;
201 * An enumeration containing the state of the GLUT execution:
202 * initializing, running, or stopping
206 GLUT_EXEC_STATE_INIT,
207 GLUT_EXEC_STATE_RUNNING,
212 * This structure holds different freeglut settings
214 typedef struct tagSFG_State SFG_State;
217 SFG_XYUse Position; /* The default windows' position */
218 SFG_XYUse Size; /* The default windows' size */
219 unsigned int DisplayMode; /* Display mode for new windows */
221 GLboolean ForceDirectContext; /* Force direct rendering? */
222 GLboolean TryDirectContext; /* What about giving a try to? */
224 GLboolean ForceIconic; /* New top windows are iconified */
225 GLboolean UseCurrentContext; /* New windows share with current */
227 GLboolean GLDebugSwitch; /* OpenGL state debugging switch */
228 GLboolean XSyncSwitch; /* X11 sync protocol switch */
230 GLboolean IgnoreKeyRepeat; /* Whether to ignore key repeat. */
232 GLuint FPSInterval; /* Interval between FPS printfs */
233 GLuint SwapCount; /* Count of glutSwapBuffer calls */
234 GLuint SwapTime; /* Time of last SwapBuffers */
236 SFG_Time Time; /* Time that glutInit was called */
237 SFG_List Timers; /* The freeglut timer hooks */
239 FGCBIdle IdleCallback; /* The global idle callback */
241 GLboolean BuildingAMenu; /* Are we presently making a menu */
242 int ActiveMenus; /* Num. of currently active menus */
243 FGCBMenuState MenuStateCallback; /* Menu callbacks are global */
244 FGCBMenuStatus MenuStatusCallback;
246 SFG_XYUse GameModeSize; /* Game mode screen's dimensions */
247 int GameModeDepth; /* The pixel depth for game mode */
248 int GameModeRefresh; /* The refresh rate for game mode */
250 int ActionOnWindowClose; /* Action when user closes window */
252 fgExecutionState ExecState; /* Used for GLUT termination */
253 char *ProgramName; /* Name of the invoking program */
257 * The structure used by display initialization in freeglut_init.c
259 typedef struct tagSFG_Display SFG_Display;
260 struct tagSFG_Display
262 #if TARGET_HOST_UNIX_X11
263 Display* Display; /* The display we are being run in. */
264 int Screen; /* The screen we are about to use. */
265 Window RootWindow; /* The screen's root window. */
266 int Connection; /* The display's connection number */
267 Atom DeleteWindow; /* The window deletion atom */
269 #ifdef X_XF86VidModeGetModeLine
271 * XF86VidMode may be compilable even if it fails at runtime. Therefore,
272 * the validity of the VidMode has to be tracked
274 int DisplayModeValid; /* Flag that indicates runtime status*/
275 XF86VidModeModeLine DisplayMode; /* Current screen's display settings */
276 int DisplayModeClock; /* The display mode's refresh rate */
277 int DisplayViewPortX; /* saved X location of the viewport */
278 int DisplayViewPortY; /* saved Y location of the viewport */
279 int DisplayPointerX; /* saved X location of the pointer */
280 int DisplayPointerY; /* saved Y location of the pointer */
284 #elif TARGET_HOST_WIN32
285 HINSTANCE Instance; /* The application's instance */
286 DEVMODE DisplayMode; /* Desktop's display settings */
290 int ScreenWidth; /* The screen's width in pixels */
291 int ScreenHeight; /* The screen's height in pixels */
292 int ScreenWidthMM; /* The screen's width in milimeters */
293 int ScreenHeightMM; /* The screen's height in milimeters */
298 * The user can create any number of timer hooks
300 typedef struct tagSFG_Timer SFG_Timer;
304 int ID; /* The timer ID integer */
305 FGCBTimer Callback; /* The timer callback */
306 long TriggerTime; /* The timer trigger time */
310 * A window and its OpenGL context. The contents of this structure
311 * are highly dependant on the target operating system we aim at...
313 typedef struct tagSFG_Context SFG_Context;
314 struct tagSFG_Context
316 #if TARGET_HOST_UNIX_X11
317 Window Handle; /* The window's handle */
318 GLXContext Context; /* The OpenGL context */
319 XVisualInfo* VisualInfo; /* The window's visual information */
321 #elif TARGET_HOST_WIN32
322 HWND Handle; /* The window's handle */
323 HDC Device; /* The window's device context */
324 HGLRC Context; /* The window's WGL context */
328 int DoubleBuffered; /* Treat the window as double-buffered */
332 * 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 */
340 GLboolean Redisplay; /* Do we have to redisplay? */
341 GLboolean Visible; /* Is the window visible now */
343 int Cursor; /* The currently selected cursor */
344 int Modifiers; /* The current ALT/SHIFT/CTRL state */
346 long JoystickPollRate; /* The joystick polling rate */
347 long JoystickLastPoll; /* When the last poll has happened */
349 int MouseX, MouseY; /* The most recent mouse position */
351 GLboolean IsGameMode; /* Is this the game mode window? */
353 #if TARGET_HOST_WIN32
354 GLboolean NeedToResize; /* Do we need to explicitly resize? */
360 * FETCH_WCB() is used as:
362 * FETCH_WCB( window, Visibility );
364 * ...where {window} is the freeglut window to fetch the callback from,
365 * {Visibility} is the window-specific callback to fetch.
367 * The result is correctly type-cast to the callback function pointer
370 #define FETCH_WCB(window,cbname) \
371 ((FGCB ## cbname)((window).CallBacks[CB_ ## cbname]))
374 * INVOKE_WCB() is used as:
376 * INVOKE_WCB( window, Visibility, ( status ) );
378 * ...where {window} is the freeglut window,
379 * {Visibility} is the window-specific callback,
380 * {(status)} is the parameter list.
382 * The callback is invoked as:
384 * callback( status );
386 * ...so the parentheses are REQUIRED in the {arg_list}.
388 * NOTE that it does a sanity-check and also sets the
392 #define INVOKE_WCB(window,cbname,arg_list) \
395 if( FETCH_WCB( window, cbname ) ) \
397 fgSetWindow( &window ); \
398 FETCH_WCB( window, cbname ) arg_list; \
403 * The window callbacks the user can supply us with. Should be kept portable.
405 * This enumeration provides the freeglut CallBack numbers.
406 * The symbolic constants are indices into a window's array of
407 * function callbacks. The names are formed by splicing a common
408 * prefix onto the callback's base name. (This was originally
409 * done so that an early stage of development could live side-by-
410 * side with the old callback code. The old callback code used
411 * the bare callback's name as a structure member, so I used a
412 * prefix for the array index name.)
414 * XXX For consistancy, perhaps the prefix should match the
415 * XXX FETCH* and INVOKE* macro suffices. I.e., WCB_, rather than
436 /* Presently ignored */
447 /* Always make this the LAST one */
453 * This structure holds the OpenGL rendering context for all the menu windows
455 typedef struct tagSFG_MenuContext SFG_MenuContext;
456 struct tagSFG_MenuContext
458 #if TARGET_HOST_UNIX_X11
459 GLXContext Context; /* The menu OpenGL context */
460 XVisualInfo* VisualInfo; /* The window's visual information */
461 #elif TARGET_HOST_WIN32
462 HGLRC Context; /* The menu window's WGL context */
468 * This structure describes a menu
470 typedef struct tagSFG_Window SFG_Window;
471 typedef struct tagSFG_MenuEntry SFG_MenuEntry;
472 typedef struct tagSFG_Menu SFG_Menu;
476 void *UserData; /* User data passed back at callback */
477 int ID; /* The global menu ID */
478 SFG_List Entries; /* The menu entries list */
479 FGCBMenu Callback; /* The menu callback */
480 FGCBDestroy Destroy; /* Destruction callback */
481 GLboolean IsActive; /* Is the menu selected? */
482 int Width; /* Menu box width in pixels */
483 int Height; /* Menu box height in pixels */
484 int X, Y; /* Menu box raster position */
486 SFG_MenuEntry *ActiveEntry; /* Currently active entry in the menu */
487 SFG_Window *Window; /* Window for menu */
488 SFG_Window *ParentWindow; /* Window in which the menu is defined */
492 * This is a menu entry
494 struct tagSFG_MenuEntry
497 int ID; /* The menu entry ID (local) */
498 int Ordinal; /* The menu's ordinal number */
499 char* Text; /* The text to be displayed */
500 SFG_Menu* SubMenu; /* Optional sub-menu tree */
501 GLboolean IsActive; /* Is the entry highlighted? */
502 int Width; /* Label's width in pixels */
506 * A window, making part of freeglut windows hierarchy.
507 * Should be kept portable.
512 int ID; /* Window's ID number */
514 SFG_Context Window; /* Window and OpenGL context */
515 SFG_WindowState State; /* The window state */
516 void *CallBacks[ TOTAL_CALLBACKS ]; /* Array of window callbacks */
517 void *UserData ; /* For use by user */
519 SFG_Menu* Menu[ FREEGLUT_MAX_MENUS ]; /* Menus appended to window */
520 SFG_Menu* ActiveMenu; /* The window's active menu */
522 SFG_Window* Parent; /* The parent to this window */
523 SFG_List Children; /* The subwindows d.l. list */
525 GLboolean IsMenu; /* Set to 1 if we are a menu */
530 * A linked list structure of windows
532 typedef struct tagSFG_WindowList SFG_WindowList;
533 struct tagSFG_WindowList
536 GLboolean needToClose;
537 SFG_WindowList *next;
541 * This holds information about all the windows, menus etc.
543 typedef struct tagSFG_Structure SFG_Structure;
544 struct tagSFG_Structure
546 SFG_List Windows; /* The global windows list */
547 SFG_List Menus; /* The global menus list */
549 SFG_Window* Window; /* The currently active win. */
550 SFG_Menu* Menu; /* Same, but menu... */
552 SFG_MenuContext* MenuContext; /* OpenGL rendering context for menus */
554 SFG_Window* GameMode; /* The game mode window */
556 int WindowID; /* The new current window ID */
557 int MenuID; /* The new current menu ID */
561 * This structure is used for the enumeration purposes.
562 * You can easily extend its functionalities by declaring
563 * a structure containing enumerator's contents and custom
564 * data, then casting its pointer to (SFG_Enumerator *).
566 typedef struct tagSFG_Enumerator SFG_Enumerator;
567 struct tagSFG_Enumerator
569 GLboolean found; /* Used to terminate search */
570 void* data; /* Custom data pointer */
572 typedef void (* FGCBenumerator )( SFG_Window *, SFG_Enumerator * );
575 * The bitmap font structure
577 typedef struct tagSFG_Font SFG_Font;
580 char* Name; /* The source font name */
581 int Quantity; /* Number of chars in font */
582 int Height; /* Height of the characters */
583 const GLubyte** Characters; /* The characters mapping */
585 float xorig, yorig; /* Relative origin of the character */
589 * The stroke font structures
592 typedef struct tagSFG_StrokeVertex SFG_StrokeVertex;
593 struct tagSFG_StrokeVertex
598 typedef struct tagSFG_StrokeStrip SFG_StrokeStrip;
599 struct tagSFG_StrokeStrip
602 const SFG_StrokeVertex* Vertices;
605 typedef struct tagSFG_StrokeChar SFG_StrokeChar;
606 struct tagSFG_StrokeChar
610 const SFG_StrokeStrip* Strips;
613 typedef struct tagSFG_StrokeFont SFG_StrokeFont;
614 struct tagSFG_StrokeFont
616 char* Name; /* The source font name */
617 int Quantity; /* Number of chars in font */
618 GLfloat Height; /* Height of the characters */
619 const SFG_StrokeChar** Characters; /* The characters mapping */
622 /* -- GLOBAL VARIABLES EXPORTS --------------------------------------------- */
625 * Freeglut display related stuff (initialized once per session)
627 extern SFG_Display fgDisplay;
630 * Freeglut internal structure
632 extern SFG_Structure fgStructure;
635 * The current freeglut settings
637 extern SFG_State fgState;
640 /* -- PRIVATE FUNCTION DECLARATIONS ---------------------------------------- */
643 * A call to this function makes us sure that the Display and Structure
644 * subsystems have been properly initialized and are ready to be used
646 #define freeglut_assert_ready assert( fgState.Time.Set );
649 * Following definitions are somewhat similiar to GLib's,
650 * but do not generate any log messages:
652 #define freeglut_return_if_fail( expr ) \
655 #define freeglut_return_val_if_fail( expr, val ) \
660 * A call to those macros assures us that there is a current
661 * window and menu set, respectively:
663 #define freeglut_assert_window assert( fgStructure.Window != NULL );
664 #define freeglut_assert_menu assert( fgStructure.Menu != NULL );
667 * The initialize and deinitialize functions get called on glutInit()
668 * and glutMainLoop() end respectively. They should create/clean up
669 * everything inside of the freeglut
671 void fgInitialize( const char* displayName );
672 void fgDeinitialize( void );
675 * Those two functions are used to create/destroy the freeglut internal
676 * structures. This actually happens when calling glutInit() and when
677 * quitting the glutMainLoop() (which actually happens, when all windows
680 void fgCreateStructure( void );
681 void fgDestroyStructure( void );
684 * A helper function to check if a display mode is possible to use
686 #if TARGET_HOST_UNIX_X11
687 XVisualInfo* fgChooseVisual( void );
691 * The window procedure for Win32 events handling
693 #if TARGET_HOST_WIN32
694 LRESULT CALLBACK fgWindowProc( HWND hWnd, UINT uMsg,
695 WPARAM wParam, LPARAM lParam );
696 GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly,
697 unsigned char layer_type );
701 * Window creation, opening, closing and destruction.
702 * Also CallBack clearing/initialization.
703 * Defined in freeglut_structure.c, freeglut_window.c.
705 SFG_Window* fgCreateWindow( SFG_Window* parent, const char* title,
706 int x, int y, int w, int h, GLboolean gameMode );
707 void fgSetWindow ( SFG_Window *window );
708 void fgOpenWindow( SFG_Window* window, const char* title,
709 int x, int y, int w, int h, GLboolean gameMode,
711 void fgCloseWindow( SFG_Window* window );
712 void fgAddToWindowDestroyList ( SFG_Window* window,
713 GLboolean needToClose );
714 void fgCloseWindows( );
715 void fgDestroyWindow( SFG_Window* window, GLboolean needToClose );
716 void fgClearCallBacks( SFG_Window *window );
719 * Menu creation and destruction. Defined in freeglut_structure.c
721 SFG_Menu* fgCreateMenu( FGCBMenu menuCallback );
722 void fgDestroyMenu( SFG_Menu* menu );
725 * Joystick device management functions, defined in freeglut_joystick.c
727 void fgJoystickInit( int ident );
728 void fgJoystickClose( void );
729 void fgJoystickPollWindow( SFG_Window* window );
732 * Helper function to enumerate through all registered windows
733 * and one to enumerate all of a window's subwindows...
735 * The GFunc callback for those functions will be defined as:
737 * void enumCallback( gpointer window, gpointer enumerator );
739 * where window is the enumerated (sub)window pointer (SFG_Window *),
740 * and userData is the a custom user-supplied pointer. Functions
741 * are defined and exported from freeglut_structure.c file.
743 void fgEnumWindows( FGCBenumerator enumCallback, SFG_Enumerator* enumerator );
744 void fgEnumSubWindows( SFG_Window* window, FGCBenumerator enumCallback,
745 SFG_Enumerator* enumerator );
748 * fgWindowByHandle returns a (SFG_Window *) value pointing to the
749 * first window in the queue matching the specified window handle.
750 * The function is defined in freeglut_structure.c file.
752 #if TARGET_HOST_UNIX_X11
753 SFG_Window* fgWindowByHandle( Window hWindow );
754 #elif TARGET_HOST_WIN32
755 SFG_Window* fgWindowByHandle( HWND hWindow );
759 * This function is similiar to the previous one, except it is
760 * looking for a specified (sub)window identifier. The function
761 * is defined in freeglut_structure.c file.
763 SFG_Window* fgWindowByID( int windowID );
766 * Looks up a menu given its ID. This is easier that fgWindowByXXX
767 * as all menus are placed in a single doubly linked list...
769 SFG_Menu* fgMenuByID( int menuID );
772 * The menu activation and deactivation the code. This is the meat
773 * of the menu user interface handling code...
775 void fgActivateMenu( SFG_Window* window, int button );
776 void fgExecuteMenuCallback( SFG_Menu* menu );
777 GLboolean fgCheckActiveMenu ( SFG_Window *window, SFG_Menu *menu );
778 void fgDeactivateMenu( SFG_Window *window );
779 void fgDeactivateSubMenu( SFG_MenuEntry *menuEntry );
782 * This function gets called just before the buffers swap, so that
783 * freeglut can display the pull-down menus via OpenGL. The function
784 * is defined in freeglut_menu.c file.
786 void fgDisplayMenu( void );
789 * Display the mouse cursor using OpenGL calls. The function
790 * is defined in freeglut_cursor.c file.
792 void fgDisplayCursor( void );
795 * Elapsed time as per glutGet(GLUT_ELAPSED_TIME).
797 long fgElapsedTime( void );
802 void fgListInit(SFG_List *list);
803 void fgListAppend(SFG_List *list, SFG_Node *node);
804 void fgListRemove(SFG_List *list, SFG_Node *node);
805 int fgListLength(SFG_List *list);
808 * Error Messages functions
810 void fgError( const char *fmt, ... );
811 void fgWarning( const char *fmt, ... );
813 #endif /* FREEGLUT_INTERNAL_H */
815 /*** END OF FILE ***/