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 /* Freeglut is intended to function under all Unix/X11 and Win32 platforms. */
36 /* XXX: Don't all MS-Windows compilers (except Cygwin) have _WIN32 defined?
37 * XXX: If so, remove the first set of defined()'s below.
39 #if !defined(TARGET_HOST_POSIX_X11) && !defined(TARGET_HOST_MS_WINDOWS) && !defined(TARGET_HOST_MAC_OSX) && !defined(TARGET_HOST_SOLARIS)
40 #if defined(_MSC_VER) || defined(__WATCOMC__) || defined(__MINGW32__) \
41 || defined(_WIN32) || defined(_WIN32_WCE) \
42 || ( defined(__CYGWIN__) && defined(X_DISPLAY_MISSING) )
43 # define TARGET_HOST_MS_WINDOWS 1
45 #elif defined (__ANDROID__)
46 # define TARGET_HOST_ANDROID 1
48 #elif defined(__posix__) || defined(__unix__) || defined(__linux__) || defined(__sun)
49 # define TARGET_HOST_POSIX_X11 1
51 #elif defined(__APPLE__)
52 /* This is a placeholder until we get native OSX support ironed out -- JFF 11/18/09 */
53 # define TARGET_HOST_POSIX_X11 1
54 /* # define TARGET_HOST_MAC_OSX 1 */
57 # error "Unrecognized target host!"
62 /* Detect both SunPro and gcc compilers on Sun Solaris */
63 #if defined (__SVR4) && defined (__sun)
64 # define TARGET_HOST_SOLARIS 1
67 #ifndef TARGET_HOST_MS_WINDOWS
68 # define TARGET_HOST_MS_WINDOWS 0
71 #ifndef TARGET_HOST_POSIX_X11
72 # define TARGET_HOST_POSIX_X11 0
75 #ifndef TARGET_HOST_MAC_OSX
76 # define TARGET_HOST_MAC_OSX 0
79 #ifndef TARGET_HOST_SOLARIS
80 # define TARGET_HOST_SOLARIS 0
83 /* -- FIXED CONFIGURATION LIMITS ------------------------------------------- */
85 #define FREEGLUT_MAX_MENUS 3
87 /* These files should be available on every platform. */
94 /* These are included based on autoconf directives. */
95 #ifdef HAVE_SYS_TYPES_H
96 # include <sys/types.h>
101 #ifdef TIME_WITH_SYS_TIME
102 # include <sys/time.h>
104 #elif defined(HAVE_SYS_TIME_H)
105 # include <sys/time.h>
110 /* -- AUTOCONF HACKS --------------------------------------------------------*/
112 /* XXX: Update autoconf to avoid these.
113 * XXX: Are non-POSIX platforms intended not to use autoconf?
114 * If so, perhaps there should be a config_guess.h for them. Alternatively,
115 * config guesses could be placed above, just after the config.h exclusion.
117 #if defined(__FreeBSD__) || defined(__NetBSD__)
118 # define HAVE_USB_JS 1
119 # if defined(__NetBSD__) || ( defined(__FreeBSD__) && __FreeBSD_version >= 500000)
120 # define HAVE_USBHID_H 1
124 #if defined(_MSC_VER) || defined(__WATCOMC__)
125 /* strdup() is non-standard, for all but POSIX-2001 */
126 #define strdup _strdup
129 /* M_PI is non-standard (defined by BSD, not ISO-C) */
131 # define M_PI 3.14159265358979323846
134 #ifdef HAVE_STDBOOL_H
135 # include <stdbool.h>
151 /* General defines */
152 #define INVALID_MODIFIERS 0xffffffff
154 /* FreeGLUT internal time type */
155 #if defined(HAVE_STDINT_H)
157 typedef uint64_t fg_time_t;
158 #elif defined(HAVE_INTTYPES_H)
159 # include <inttypes.h>
160 typedef uint64_t fg_time_t;
161 #elif defined(HAVE_U__INT64)
162 typedef unsigned __int64 fg_time_t;
163 #elif defined(HAVE_ULONG_LONG)
164 typedef unsigned long long fg_time_t;
166 typedef unsigned long fg_time_t;
171 # define __fg_unused __attribute__((unused))
177 /* Platform-specific includes */
178 #if TARGET_HOST_POSIX_X11
179 #include "x11/fg_internal_x11.h"
181 #if TARGET_HOST_MS_WINDOWS
182 #include "mswin/fg_internal_mswin.h"
184 #if TARGET_HOST_ANDROID
185 #include "android/fg_internal_android.h"
189 /* -- GLOBAL TYPE DEFINITIONS ---------------------------------------------- */
191 /* Freeglut callbacks type definitions */
192 typedef void (* FGCBDisplay )( void );
193 typedef void (* FGCBReshape )( int, int );
194 typedef void (* FGCBVisibility )( int );
195 typedef void (* FGCBKeyboard )( unsigned char, int, int );
196 typedef void (* FGCBSpecial )( int, int, int );
197 typedef void (* FGCBMouse )( int, int, int, int );
198 typedef void (* FGCBMouseWheel )( int, int, int, int );
199 typedef void (* FGCBMotion )( int, int );
200 typedef void (* FGCBPassive )( int, int );
201 typedef void (* FGCBEntry )( int );
202 typedef void (* FGCBWindowStatus )( int );
203 typedef void (* FGCBSelect )( int, int, int );
204 typedef void (* FGCBJoystick )( unsigned int, int, int, int );
205 typedef void (* FGCBKeyboardUp )( unsigned char, int, int );
206 typedef void (* FGCBSpecialUp )( int, int, int );
207 typedef void (* FGCBOverlayDisplay)( void );
208 typedef void (* FGCBSpaceMotion )( int, int, int );
209 typedef void (* FGCBSpaceRotation )( int, int, int );
210 typedef void (* FGCBSpaceButton )( int, int );
211 typedef void (* FGCBDials )( int, int );
212 typedef void (* FGCBButtonBox )( int, int );
213 typedef void (* FGCBTabletMotion )( int, int );
214 typedef void (* FGCBTabletButton )( int, int, int, int );
215 typedef void (* FGCBDestroy )( void );
217 typedef void (* FGCBMultiEntry )( int, int );
218 typedef void (* FGCBMultiButton )( int, int, int, int, int );
219 typedef void (* FGCBMultiMotion )( int, int, int );
220 typedef void (* FGCBMultiPassive )( int, int, int );
222 /* The global callbacks type definitions */
223 typedef void (* FGCBIdle )( void );
224 typedef void (* FGCBTimer )( int );
225 typedef void (* FGCBMenuState )( int );
226 typedef void (* FGCBMenuStatus )( int, int, int );
228 /* The callback used when creating/using menus */
229 typedef void (* FGCBMenu )( int );
231 /* The FreeGLUT error/warning handler type definition */
232 typedef void (* FGError ) ( const char *fmt, va_list ap);
233 typedef void (* FGWarning ) ( const char *fmt, va_list ap);
236 /* A list structure */
237 typedef struct tagSFG_List SFG_List;
244 /* A list node structure */
245 typedef struct tagSFG_Node SFG_Node;
252 /* A helper structure holding two ints and a boolean */
253 typedef struct tagSFG_XYUse SFG_XYUse;
256 GLint X, Y; /* The two integers... */
257 GLboolean Use; /* ...and a single boolean. */
261 * An enumeration containing the state of the GLUT execution:
262 * initializing, running, or stopping
266 GLUT_EXEC_STATE_INIT,
267 GLUT_EXEC_STATE_RUNNING,
271 /* This structure holds different freeglut settings */
272 typedef struct tagSFG_State SFG_State;
275 SFG_XYUse Position; /* The default windows' position */
276 SFG_XYUse Size; /* The default windows' size */
277 unsigned int DisplayMode; /* Display mode for new windows */
279 GLboolean Initialised; /* freeglut has been initialised */
281 int DirectContext; /* Direct rendering state */
283 GLboolean ForceIconic; /* New top windows are iconified */
284 GLboolean UseCurrentContext; /* New windows share with current */
286 GLboolean GLDebugSwitch; /* OpenGL state debugging switch */
287 GLboolean XSyncSwitch; /* X11 sync protocol switch */
289 int KeyRepeat; /* Global key repeat mode. */
290 int Modifiers; /* Current ALT/SHIFT/CTRL state */
292 GLuint FPSInterval; /* Interval between FPS printfs */
293 GLuint SwapCount; /* Count of glutSwapBuffer calls */
294 GLuint SwapTime; /* Time of last SwapBuffers */
296 fg_time_t Time; /* Time that glutInit was called */
297 SFG_List Timers; /* The freeglut timer hooks */
298 SFG_List FreeTimers; /* The unused timer hooks */
300 FGCBIdle IdleCallback; /* The global idle callback */
302 int ActiveMenus; /* Num. of currently active menus */
303 FGCBMenuState MenuStateCallback; /* Menu callbacks are global */
304 FGCBMenuStatus MenuStatusCallback;
306 SFG_XYUse GameModeSize; /* Game mode screen's dimensions */
307 int GameModeDepth; /* The pixel depth for game mode */
308 int GameModeRefresh; /* The refresh rate for game mode */
310 int ActionOnWindowClose; /* Action when user closes window */
312 fgExecutionState ExecState; /* Used for GLUT termination */
313 char *ProgramName; /* Name of the invoking program */
314 GLboolean JoysticksInitialised; /* Only initialize if application calls for them */
315 int NumActiveJoysticks; /* Number of active joysticks -- if zero, don't poll joysticks */
316 GLboolean InputDevsInitialised; /* Only initialize if application calls for them */
318 int MouseWheelTicks; /* Number of ticks the mouse wheel has turned */
320 int AuxiliaryBufferNumber; /* Number of auxiliary buffers */
321 int SampleNumber; /* Number of samples per pixel */
323 GLboolean SkipStaleMotion; /* skip stale motion events */
325 int MajorVersion; /* Major OpenGL context version */
326 int MinorVersion; /* Minor OpenGL context version */
327 int ContextFlags; /* OpenGL context flags */
328 int ContextProfile; /* OpenGL context profile */
329 int HasOpenGL20; /* fgInitGL2 could find all OpenGL 2.0 functions */
330 FGError ErrorFunc; /* User defined error handler */
331 FGWarning WarningFunc; /* User defined warning handler */
334 /* The structure used by display initialization in freeglut_init.c */
335 typedef struct tagSFG_Display SFG_Display;
336 struct tagSFG_Display
338 SFG_PlatformDisplay pDisplay;
340 int ScreenWidth; /* The screen's width in pixels */
341 int ScreenHeight; /* The screen's height in pixels */
342 int ScreenWidthMM; /* The screen's width in milimeters */
343 int ScreenHeightMM; /* The screen's height in milimeters */
347 /* The user can create any number of timer hooks */
348 typedef struct tagSFG_Timer SFG_Timer;
352 int ID; /* The timer ID integer */
353 FGCBTimer Callback; /* The timer callback */
354 fg_time_t TriggerTime; /* The timer trigger time */
358 * A window and its OpenGL context. The contents of this structure
359 * are highly dependant on the target operating system we aim at...
361 typedef struct tagSFG_Context SFG_Context;
362 struct tagSFG_Context
364 SFG_WindowHandleType Handle; /* The window's handle */
365 SFG_WindowContextType Context; /* The window's OpenGL/WGL context */
367 SFG_PlatformContext pContext; /* The window's FBConfig (X11) or device context (Windows) */
369 int DoubleBuffered; /* Treat the window as double-buffered */
370 GLint attribute_v_coord;
371 GLint attribute_v_normal;
375 typedef struct tagSFG_WindowState SFG_WindowState;
376 struct tagSFG_WindowState
378 /* Note that on Windows, sizes always refer to the client area, thus without the window decorations */
379 int Width; /* Window's width in pixels */
380 int Height; /* The same about the height */
382 SFG_PlatformWindowState pWState; /* Window width/height (X11) or rectangle/style (Windows) from before a resize */
384 GLboolean Redisplay; /* Do we have to redisplay? */
385 GLboolean Visible; /* Is the window visible now */
387 int Cursor; /* The currently selected cursor */
389 long JoystickPollRate; /* The joystick polling rate */
390 fg_time_t JoystickLastPoll; /* When the last poll happened */
392 int MouseX, MouseY; /* The most recent mouse position */
394 GLboolean IgnoreKeyRepeat; /* Whether to ignore key repeat. */
395 GLboolean KeyRepeating; /* Currently in repeat mode */
397 GLboolean NeedToResize; /* Do we need to resize the window? */
399 GLboolean IsFullscreen; /* is the window fullscreen? */
404 * A generic function pointer. We should really use the GLUTproc type
405 * defined in freeglut_ext.h, but if we include that header in this file
406 * a bunch of other stuff (font-related) blows up!
408 typedef void (*SFG_Proc)();
412 * SET_WCB() is used as:
414 * SET_WCB( window, cbname, func );
416 * ...where {window} is the freeglut window to set the callback,
417 * {cbname} is the window-specific callback to set,
418 * {func} is a function-pointer.
420 * Originally, {FETCH_WCB( ... ) = func} was rather sloppily used,
421 * but this can cause warnings because the FETCH_WCB() macro type-
422 * casts its result, and a type-cast value shouldn't be an lvalue.
424 * The {if( FETCH_WCB( ... ) != func )} test is to do type-checking
425 * and for no other reason. Since it's hidden in the macro, the
426 * ugliness is felt to be rather benign.
428 #define SET_WCB(window,cbname,func) \
431 if( FETCH_WCB( window, cbname ) != (SFG_Proc)(func) ) \
432 (((window).CallBacks[CB_ ## cbname]) = (SFG_Proc)(func)); \
436 * FETCH_WCB() is used as:
438 * FETCH_WCB( window, cbname );
440 * ...where {window} is the freeglut window to fetch the callback from,
441 * {cbname} is the window-specific callback to fetch.
443 * The result is correctly type-cast to the callback function pointer
446 #define FETCH_WCB(window,cbname) \
447 ((window).CallBacks[CB_ ## cbname])
450 * INVOKE_WCB() is used as:
452 * INVOKE_WCB( window, cbname, ( arg_list ) );
454 * ...where {window} is the freeglut window,
455 * {cbname} is the window-specific callback to be invoked,
456 * {(arg_list)} is the parameter list.
458 * The callback is invoked as:
460 * callback( arg_list );
462 * ...so the parentheses are REQUIRED in the {arg_list}.
464 * NOTE that it does a sanity-check and also sets the
468 #if TARGET_HOST_MS_WINDOWS && !defined(_WIN32_WCE) /* FIXME: also WinCE? */
469 #define INVOKE_WCB(window,cbname,arg_list) \
472 if( FETCH_WCB( window, cbname ) ) \
474 FGCB ## cbname func = (FGCB ## cbname)(FETCH_WCB( window, cbname )); \
475 fgSetWindow( &window ); \
480 #define INVOKE_WCB(window,cbname,arg_list) \
483 if( FETCH_WCB( window, cbname ) ) \
485 fgSetWindow( &window ); \
486 ((FGCB ## cbname)FETCH_WCB( window, cbname )) arg_list; \
492 * The window callbacks the user can supply us with. Should be kept portable.
494 * This enumeration provides the freeglut CallBack numbers.
495 * The symbolic constants are indices into a window's array of
496 * function callbacks. The names are formed by splicing a common
497 * prefix onto the callback's base name. (This was originally
498 * done so that an early stage of development could live side-by-
499 * side with the old callback code. The old callback code used
500 * the bare callback's name as a structure member, so I used a
501 * prefix for the array index name.)
503 * XXX For consistancy, perhaps the prefix should match the
504 * XXX FETCH* and INVOKE* macro suffices. I.e., WCB_, rather than
531 /* Presently ignored */
534 CB_SpaceMotion, /* presently implemented only on UNIX/X11 */
535 CB_SpaceRotation, /* presently implemented only on UNIX/X11 */
536 CB_SpaceButton, /* presently implemented only on UNIX/X11 */
542 /* Always make this the LAST one */
547 /* This structure holds the OpenGL rendering context for all the menu windows */
548 typedef struct tagSFG_MenuContext SFG_MenuContext;
549 struct tagSFG_MenuContext
551 SFG_WindowContextType MContext; /* The menu window's WGL context */
554 /* This structure describes a menu */
555 typedef struct tagSFG_Window SFG_Window;
556 typedef struct tagSFG_MenuEntry SFG_MenuEntry;
557 typedef struct tagSFG_Menu SFG_Menu;
561 void *UserData; /* User data passed back at callback */
562 int ID; /* The global menu ID */
563 SFG_List Entries; /* The menu entries list */
564 FGCBMenu Callback; /* The menu callback */
565 FGCBDestroy Destroy; /* Destruction callback */
566 GLboolean IsActive; /* Is the menu selected? */
567 int Width; /* Menu box width in pixels */
568 int Height; /* Menu box height in pixels */
569 int X, Y; /* Menu box raster position */
571 SFG_MenuEntry *ActiveEntry; /* Currently active entry in the menu */
572 SFG_Window *Window; /* Window for menu */
573 SFG_Window *ParentWindow; /* Window in which the menu is invoked */
576 /* This is a menu entry */
577 struct tagSFG_MenuEntry
580 int ID; /* The menu entry ID (local) */
581 int Ordinal; /* The menu's ordinal number */
582 char* Text; /* The text to be displayed */
583 SFG_Menu* SubMenu; /* Optional sub-menu tree */
584 GLboolean IsActive; /* Is the entry highlighted? */
585 int Width; /* Label's width in pixels */
589 * A window, making part of freeglut windows hierarchy.
590 * Should be kept portable.
592 * NOTE that ActiveMenu is set to menu itself if the window is a menu.
597 int ID; /* Window's ID number */
599 SFG_Context Window; /* Window and OpenGL context */
600 SFG_WindowState State; /* The window state */
601 SFG_Proc CallBacks[ TOTAL_CALLBACKS ]; /* Array of window callbacks */
602 void *UserData ; /* For use by user */
604 SFG_Menu* Menu[ FREEGLUT_MAX_MENUS ]; /* Menus appended to window */
605 SFG_Menu* ActiveMenu; /* The window's active menu */
607 SFG_Window* Parent; /* The parent to this window */
608 SFG_List Children; /* The subwindows d.l. list */
610 GLboolean IsMenu; /* Set to 1 if we are a menu */
614 /* A linked list structure of windows */
615 typedef struct tagSFG_WindowList SFG_WindowList ;
616 struct tagSFG_WindowList
622 /* This holds information about all the windows, menus etc. */
623 typedef struct tagSFG_Structure SFG_Structure;
624 struct tagSFG_Structure
626 SFG_List Windows; /* The global windows list */
627 SFG_List Menus; /* The global menus list */
628 SFG_List WindowsToDestroy;
630 SFG_Window* CurrentWindow; /* The currently set window */
631 SFG_Menu* CurrentMenu; /* Same, but menu... */
633 SFG_MenuContext* MenuContext; /* OpenGL rendering context for menus */
635 SFG_Window* GameModeWindow; /* The game mode window */
637 int WindowID; /* The new current window ID */
638 int MenuID; /* The new current menu ID */
642 * This structure is used for the enumeration purposes.
643 * You can easily extend its functionalities by declaring
644 * a structure containing enumerator's contents and custom
645 * data, then casting its pointer to (SFG_Enumerator *).
647 typedef struct tagSFG_Enumerator SFG_Enumerator;
648 struct tagSFG_Enumerator
650 GLboolean found; /* Used to terminate search */
651 void* data; /* Custom data pointer */
653 typedef void (* FGCBenumerator )( SFG_Window *, SFG_Enumerator * );
655 /* The bitmap font structure */
656 typedef struct tagSFG_Font SFG_Font;
659 char* Name; /* The source font name */
660 int Quantity; /* Number of chars in font */
661 int Height; /* Height of the characters */
662 const GLubyte** Characters; /* The characters mapping */
664 float xorig, yorig; /* Relative origin of the character */
667 /* The stroke font structures */
669 typedef struct tagSFG_StrokeVertex SFG_StrokeVertex;
670 struct tagSFG_StrokeVertex
675 typedef struct tagSFG_StrokeStrip SFG_StrokeStrip;
676 struct tagSFG_StrokeStrip
679 const SFG_StrokeVertex* Vertices;
682 typedef struct tagSFG_StrokeChar SFG_StrokeChar;
683 struct tagSFG_StrokeChar
687 const SFG_StrokeStrip* Strips;
690 typedef struct tagSFG_StrokeFont SFG_StrokeFont;
691 struct tagSFG_StrokeFont
693 char* Name; /* The source font name */
694 int Quantity; /* Number of chars in font */
695 GLfloat Height; /* Height of the characters */
696 const SFG_StrokeChar** Characters; /* The characters mapping */
700 /* -- JOYSTICK-SPECIFIC STRUCTURES AND TYPES ------------------------------- */
702 * Initial defines from "js.h" starting around line 33 with the existing "freeglut_joystick.c"
706 #if TARGET_HOST_MACINTOSH
707 # include <InputSprocket.h>
710 #if TARGET_HOST_MAC_OSX
711 # include <mach/mach.h>
712 # include <IOKit/IOkitLib.h>
713 # include <IOKit/hid/IOHIDLib.h>
716 /* XXX It might be better to poll the operating system for the numbers of buttons and
717 * XXX axes and then dynamically allocate the arrays.
719 #define _JS_MAX_BUTTONS 32
721 #if TARGET_HOST_MACINTOSH
722 # define _JS_MAX_AXES 9
723 typedef struct tagSFG_PlatformJoystick SFG_PlatformJoystick;
724 struct tagSFG_PlatformJoystick
726 #define ISP_NUM_AXIS 9
727 #define ISP_NUM_NEEDS 41
728 ISpElementReference isp_elem [ ISP_NUM_NEEDS ];
729 ISpNeed isp_needs [ ISP_NUM_NEEDS ];
733 #if TARGET_HOST_MAC_OSX
734 # define _JS_MAX_AXES 16
735 typedef struct tagSFG_PlatformJoystick SFG_PlatformJoystick;
736 struct tagSFG_PlatformJoystick
738 IOHIDDeviceInterface ** hidDev;
739 IOHIDElementCookie buttonCookies[41];
740 IOHIDElementCookie axisCookies[_JS_MAX_AXES];
741 /* The next two variables are not used anywhere */
742 /* long minReport[_JS_MAX_AXES],
743 * maxReport[_JS_MAX_AXES];
750 * Definition of "SFG_Joystick" structure -- based on JS's "jsJoystick" object class.
751 * See "js.h" lines 80-178.
753 typedef struct tagSFG_Joystick SFG_Joystick;
754 struct tagSFG_Joystick
756 SFG_PlatformJoystick pJoystick;
764 float dead_band[ _JS_MAX_AXES ];
765 float saturate [ _JS_MAX_AXES ];
766 float center [ _JS_MAX_AXES ];
767 float max [ _JS_MAX_AXES ];
768 float min [ _JS_MAX_AXES ];
773 /* -- GLOBAL VARIABLES EXPORTS --------------------------------------------- */
775 /* Freeglut display related stuff (initialized once per session) */
776 extern SFG_Display fgDisplay;
778 /* Freeglut internal structure */
779 extern SFG_Structure fgStructure;
781 /* The current freeglut settings */
782 extern SFG_State fgState;
785 /* -- PRIVATE FUNCTION DECLARATIONS ---------------------------------------- */
788 * A call to this function makes us sure that the Display and Structure
789 * subsystems have been properly initialized and are ready to be used
791 #define FREEGLUT_EXIT_IF_NOT_INITIALISED( string ) \
792 if ( ! fgState.Initialised ) \
794 fgError ( " ERROR: Function <%s> called" \
795 " without first calling 'glutInit'.", (string) ) ; \
798 #define FREEGLUT_INTERNAL_ERROR_EXIT_IF_NOT_INITIALISED( string ) \
799 if ( ! fgState.Initialised ) \
801 fgError ( " ERROR: Internal <%s> function called" \
802 " without first calling 'glutInit'.", (string) ) ; \
805 #define FREEGLUT_INTERNAL_ERROR_EXIT( cond, string, function ) \
808 fgError ( " ERROR: Internal error <%s> in function %s", \
809 (string), (function) ) ; \
813 * Following definitions are somewhat similiar to GLib's,
814 * but do not generate any log messages:
816 #define freeglut_return_if_fail( expr ) \
819 #define freeglut_return_val_if_fail( expr, val ) \
824 * A call to those macros assures us that there is a current
825 * window set, respectively:
827 #define FREEGLUT_EXIT_IF_NO_WINDOW( string ) \
828 if ( ! fgStructure.CurrentWindow && \
829 ( fgState.ActionOnWindowClose != GLUT_ACTION_CONTINUE_EXECUTION ) ) \
831 fgError ( " ERROR: Function <%s> called" \
832 " with no current window defined.", (string) ) ; \
836 * The deinitialize function gets called on glutMainLoop() end. It should clean up
837 * everything inside of the freeglut
839 void fgDeinitialize( void );
842 * Those two functions are used to create/destroy the freeglut internal
843 * structures. This actually happens when calling glutInit() and when
844 * quitting the glutMainLoop() (which actually happens, when all windows
847 void fgCreateStructure( void );
848 void fgDestroyStructure( void );
851 * Window creation, opening, closing and destruction.
852 * Also CallBack clearing/initialization.
853 * Defined in freeglut_structure.c, freeglut_window.c.
855 SFG_Window* fgCreateWindow( SFG_Window* parent, const char* title,
856 GLboolean positionUse, int x, int y,
857 GLboolean sizeUse, int w, int h,
858 GLboolean gameMode, GLboolean isMenu );
859 void fgSetWindow ( SFG_Window *window );
860 void fgOpenWindow( SFG_Window* window, const char* title,
861 GLboolean positionUse, int x, int y,
862 GLboolean sizeUse, int w, int h,
863 GLboolean gameMode, GLboolean isSubWindow );
864 void fgCloseWindow( SFG_Window* window );
865 void fgAddToWindowDestroyList ( SFG_Window* window );
866 void fgCloseWindows ();
867 void fgDestroyWindow( SFG_Window* window );
869 /* Menu creation and destruction. Defined in freeglut_structure.c */
870 SFG_Menu* fgCreateMenu( FGCBMenu menuCallback );
871 void fgDestroyMenu( SFG_Menu* menu );
873 /* Joystick device management functions, defined in freeglut_joystick.c */
874 int fgJoystickDetect( void );
875 void fgInitialiseJoysticks( void );
876 void fgJoystickClose( void );
877 void fgJoystickPollWindow( SFG_Window* window );
879 /* InputDevice Initialisation and Closure */
880 int fgInputDeviceDetect( void );
881 void fgInitialiseInputDevices( void );
882 void fgInputDeviceClose( void );
884 /* spaceball device functions, defined in freeglut_spaceball.c */
885 void fgInitialiseSpaceball( void );
886 void fgSpaceballClose( void );
887 void fgSpaceballSetWindow( SFG_Window *window );
889 int fgHasSpaceball( void );
890 int fgSpaceballNumButtons( void );
892 /* Setting the cursor for a given window */
893 void fgSetCursor ( SFG_Window *window, int cursorID );
896 * Helper function to enumerate through all registered windows
897 * and one to enumerate all of a window's subwindows...
899 * The GFunc callback for those functions will be defined as:
901 * void enumCallback( gpointer window, gpointer enumerator );
903 * where window is the enumerated (sub)window pointer (SFG_Window *),
904 * and userData is the a custom user-supplied pointer. Functions
905 * are defined and exported from freeglut_structure.c file.
907 void fgEnumWindows( FGCBenumerator enumCallback, SFG_Enumerator* enumerator );
908 void fgEnumSubWindows( SFG_Window* window, FGCBenumerator enumCallback,
909 SFG_Enumerator* enumerator );
912 * fgWindowByHandle returns a (SFG_Window *) value pointing to the
913 * first window in the queue matching the specified window handle.
914 * The function is defined in freeglut_structure.c file.
916 SFG_Window* fgWindowByHandle( SFG_WindowHandleType hWindow );
919 * This function is similiar to the previous one, except it is
920 * looking for a specified (sub)window identifier. The function
921 * is defined in freeglut_structure.c file.
923 SFG_Window* fgWindowByID( int windowID );
926 * Looks up a menu given its ID. This is easier than fgWindowByXXX
927 * as all menus are placed in a single doubly linked list...
929 SFG_Menu* fgMenuByID( int menuID );
932 * The menu activation and deactivation the code. This is the meat
933 * of the menu user interface handling code...
935 void fgUpdateMenuHighlight ( SFG_Menu *menu );
936 GLboolean fgCheckActiveMenu ( SFG_Window *window, int button, GLboolean pressed,
937 int mouse_x, int mouse_y );
938 void fgDeactivateMenu( SFG_Window *window );
941 * This function gets called just before the buffers swap, so that
942 * freeglut can display the pull-down menus via OpenGL. The function
943 * is defined in freeglut_menu.c file.
945 void fgDisplayMenu( void );
947 /* Elapsed time as per glutGet(GLUT_ELAPSED_TIME). */
948 fg_time_t fgElapsedTime( void );
950 /* System time in milliseconds */
951 fg_time_t fgSystemTime(void);
954 void fgListInit(SFG_List *list);
955 void fgListAppend(SFG_List *list, SFG_Node *node);
956 void fgListRemove(SFG_List *list, SFG_Node *node);
957 int fgListLength(SFG_List *list);
958 void fgListInsert(SFG_List *list, SFG_Node *next, SFG_Node *node);
960 /* Error Message functions */
961 void fgError( const char *fmt, ... );
962 void fgWarning( const char *fmt, ... );
964 SFG_Proc fgPlatformGetProcAddress( const char *procName );
966 /* pushing attribute/value pairs into an array */
967 #define ATTRIB(a) attributes[where++]=(a)
968 #define ATTRIB_VAL(a,v) {ATTRIB(a); ATTRIB(v);}
970 int fghMapBit( int mask, int from, int to );
971 int fghIsLegacyContextRequested( void );
972 void fghContextCreationError( void );
973 int fghNumberOfAuxBuffersRequested( void );
975 #endif /* FREEGLUT_INTERNAL_H */
977 /*** END OF FILE ***/