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/*
* freeglut_internal.h
*
* The freeglut library private include file.
*
* Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
* Written by Pawel W. Olszta, <olszta@sourceforge.net>
* Creation date: Thu Dec 2 1999
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef FREEGLUT_INTERNAL_H
#define FREEGLUT_INTERNAL_H
#if HAVE_CONFIG_H
# include "config.h"
#endif
/* XXX Update these for each release! */
#define VERSION_MAJOR 2
#define VERSION_MINOR 6
#define VERSION_PATCH 0
/* Freeglut is intended to function under all Unix/X11 and Win32 platforms. */
/* XXX: Don't all MS-Windows compilers (except Cygwin) have _WIN32 defined?
* XXX: If so, remove the first set of defined()'s below.
*/
#if defined(_MSC_VER) || defined(__WATCOMC__) || defined(__MINGW32__) \
|| defined(_WIN32) || defined(_WIN32_WCE) \
|| ( defined(__CYGWIN__) && defined(X_DISPLAY_MISSING) )
# define TARGET_HOST_MS_WINDOWS 1
#elif defined(__posix__) || defined(__unix__) || defined(__linux__)
# define TARGET_HOST_POSIX_X11 1
#elif defined(__APPLE__)
/* This is a placeholder until we get native OSX support ironed out -- JFF 11/18/09 */
# define TARGET_HOST_POSIX_X11 1
/* # define TARGET_HOST_MAC_OSX 1 */
#else
# error "Unrecognized target host!"
*/
#endif
/* Detect both SunPro and gcc compilers on Sun Solaris */
#if defined (__SVR4) && defined (__sun)
# define TARGET_HOST_SOLARIS 1
#endif
#ifndef TARGET_HOST_MS_WINDOWS
# define TARGET_HOST_MS_WINDOWS 0
#endif
#ifndef TARGET_HOST_POSIX_X11
# define TARGET_HOST_POSIX_X11 0
#endif
#ifndef TARGET_HOST_MAC_OSX
# define TARGET_HOST_MAC_OSX 0
#endif
#ifndef TARGET_HOST_SOLARIS
# define TARGET_HOST_SOLARIS 0
#endif
/* -- FIXED CONFIGURATION LIMITS ------------------------------------------- */
#define FREEGLUT_MAX_MENUS 3
/* -- PLATFORM-SPECIFIC INCLUDES ------------------------------------------- */
/* All Win32 headers depend on the huge Windows.h recursive include.
* Note: Let's use proper case for MS-Win headers. Even though it's
* not required due to case insensitivity, it's a good habit to keep
* because the cross-platform includes are case sensitive.
*/
#if TARGET_HOST_MS_WINDOWS && !defined(_WIN32_WCE)
# include <Windows.h>
# include <WindowsX.h>
# include <MMSystem.h>
/* CYGWIN does not have tchar.h, but has TEXT(x), defined in winnt.h. */
# ifndef __CYGWIN__
# include <tchar.h>
# else
# define _TEXT(x) TEXT(x)
# define _T(x) TEXT(x)
# endif
#elif TARGET_HOST_POSIX_X11
# include <GL/glx.h>
# include <X11/Xlib.h>
# include <X11/Xatom.h>
# include <X11/keysym.h>
# include <X11/extensions/XInput.h>
# ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
# include <X11/extensions/xf86vmode.h>
# endif
/* If GLX is too old, we will fail during runtime when multisampling
is requested, but at least freeglut compiles. */
# ifndef GLX_SAMPLE_BUFFERS
# define GLX_SAMPLE_BUFFERS 0x80A8
# endif
# ifndef GLX_SAMPLES
# define GLX_SAMPLES 0x80A9
# endif
#endif
/* These files should be available on every platform. */
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
/* These are included based on autoconf directives. */
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#elif HAVE_SYS_TIME_H
# include <sys/time.h>
#else
# include <time.h>
#endif
/* -- AUTOCONF HACKS --------------------------------------------------------*/
/* XXX: Update autoconf to avoid these.
* XXX: Are non-POSIX platforms intended not to use autoconf?
* If so, perhaps there should be a config_guess.h for them. Alternatively,
* config guesses could be placed above, just after the config.h exclusion.
*/
#if defined(__FreeBSD__) || defined(__NetBSD__)
# define HAVE_USB_JS 1
# if defined(__NetBSD__) || ( defined(__FreeBSD__) && __FreeBSD_version >= 500000)
# define HAVE_USBHID_H 1
# endif
#endif
#if TARGET_HOST_MS_WINDOWS
# define HAVE_VPRINTF 1
#endif
#if !defined(HAVE_VPRINTF) && !defined(HAVE_DOPRNT)
/* XXX warning directive here? */
# define HAVE_VPRINTF 1
#endif
/* MinGW may lack a prototype for ChangeDisplaySettingsEx() (depending on the version?) */
#if TARGET_HOST_MS_WINDOWS && !defined(ChangeDisplaySettingsEx)
LONG WINAPI ChangeDisplaySettingsExA(LPCSTR,LPDEVMODEA,HWND,DWORD,LPVOID);
LONG WINAPI ChangeDisplaySettingsExW(LPCWSTR,LPDEVMODEW,HWND,DWORD,LPVOID);
# ifdef UNICODE
# define ChangeDisplaySettingsEx ChangeDisplaySettingsExW
# else
# define ChangeDisplaySettingsEx ChangeDisplaySettingsExA
# endif
#endif
#if defined(_MSC_VER) || defined(__WATCOMC__)
/* strdup() is non-standard, for all but POSIX-2001 */
#define strdup _strdup
#endif
/* M_PI is non-standard (defined by BSD, not ISO-C) */
#ifndef M_PI
# define M_PI 3.14159265358979323846
#endif
#ifndef TRUE
# define TRUE 1
#endif
#ifndef FALSE
# define FALSE 0
#endif
/* General defines */
#define INVALID_MODIFIERS 0xffffffff
/* -- GLOBAL TYPE DEFINITIONS ---------------------------------------------- */
/* Freeglut callbacks type definitions */
typedef void (* FGCBDisplay )( void );
typedef void (* FGCBReshape )( int, int );
typedef void (* FGCBVisibility )( int );
typedef void (* FGCBKeyboard )( unsigned char, int, int );
typedef void (* FGCBSpecial )( int, int, int );
typedef void (* FGCBMouse )( int, int, int, int );
typedef void (* FGCBMouseWheel )( int, int, int, int );
typedef void (* FGCBMotion )( int, int );
typedef void (* FGCBPassive )( int, int );
typedef void (* FGCBEntry )( int );
typedef void (* FGCBWindowStatus )( int );
typedef void (* FGCBSelect )( int, int, int );
typedef void (* FGCBJoystick )( unsigned int, int, int, int );
typedef void (* FGCBKeyboardUp )( unsigned char, int, int );
typedef void (* FGCBSpecialUp )( int, int, int );
typedef void (* FGCBOverlayDisplay)( void );
typedef void (* FGCBSpaceMotion )( int, int, int );
typedef void (* FGCBSpaceRotation )( int, int, int );
typedef void (* FGCBSpaceButton )( int, int );
typedef void (* FGCBDials )( int, int );
typedef void (* FGCBButtonBox )( int, int );
typedef void (* FGCBTabletMotion )( int, int );
typedef void (* FGCBTabletButton )( int, int, int, int );
typedef void (* FGCBDestroy )( void );
/* The global callbacks type definitions */
typedef void (* FGCBIdle )( void );
typedef void (* FGCBTimer )( int );
typedef void (* FGCBMenuState )( int );
typedef void (* FGCBMenuStatus )( int, int, int );
/* The callback used when creating/using menus */
typedef void (* FGCBMenu )( int );
/* A list structure */
typedef struct tagSFG_List SFG_List;
struct tagSFG_List
{
void *First;
void *Last;
};
/* A list node structure */
typedef struct tagSFG_Node SFG_Node;
struct tagSFG_Node
{
void *Next;
void *Prev;
};
/* A helper structure holding two ints and a boolean */
typedef struct tagSFG_XYUse SFG_XYUse;
struct tagSFG_XYUse
{
GLint X, Y; /* The two integers... */
GLboolean Use; /* ...and a single boolean. */
};
/*
* An enumeration containing the state of the GLUT execution:
* initializing, running, or stopping
*/
typedef enum
{
GLUT_EXEC_STATE_INIT,
GLUT_EXEC_STATE_RUNNING,
GLUT_EXEC_STATE_STOP
} fgExecutionState ;
/* This structure holds different freeglut settings */
typedef struct tagSFG_State SFG_State;
struct tagSFG_State
{
SFG_XYUse Position; /* The default windows' position */
SFG_XYUse Size; /* The default windows' size */
unsigned int DisplayMode; /* Display mode for new windows */
GLboolean Initialised; /* freeglut has been initialised */
int DirectContext; /* Direct rendering state */
GLboolean ForceIconic; /* New top windows are iconified */
GLboolean UseCurrentContext; /* New windows share with current */
GLboolean GLDebugSwitch; /* OpenGL state debugging switch */
GLboolean XSyncSwitch; /* X11 sync protocol switch */
int KeyRepeat; /* Global key repeat mode. */
int Modifiers; /* Current ALT/SHIFT/CTRL state */
GLuint FPSInterval; /* Interval between FPS printfs */
GLuint SwapCount; /* Count of glutSwapBuffer calls */
GLuint SwapTime; /* Time of last SwapBuffers */
unsigned long Time; /* Time that glutInit was called */
SFG_List Timers; /* The freeglut timer hooks */
SFG_List FreeTimers; /* The unused timer hooks */
FGCBIdle IdleCallback; /* The global idle callback */
int ActiveMenus; /* Num. of currently active menus */
FGCBMenuState MenuStateCallback; /* Menu callbacks are global */
FGCBMenuStatus MenuStatusCallback;
SFG_XYUse GameModeSize; /* Game mode screen's dimensions */
int GameModeDepth; /* The pixel depth for game mode */
int GameModeRefresh; /* The refresh rate for game mode */
int ActionOnWindowClose; /* Action when user closes window */
fgExecutionState ExecState; /* Used for GLUT termination */
char *ProgramName; /* Name of the invoking program */
GLboolean JoysticksInitialised; /* Only initialize if application calls for them */
GLboolean InputDevsInitialised; /* Only initialize if application calls for them */
int AuxiliaryBufferNumber; /* Number of auxiliary buffers */
int SampleNumber; /* Number of samples per pixel */
int MajorVersion; /* Major OpenGL context version */
int MinorVersion; /* Minor OpenGL context version */
int ContextFlags; /* OpenGL context flags */
int ContextProfile; /* OpenGL context profile */
};
/* The structure used by display initialization in freeglut_init.c */
typedef struct tagSFG_Display SFG_Display;
struct tagSFG_Display
{
#if TARGET_HOST_POSIX_X11
Display* Display; /* The display we are being run in. */
int Screen; /* The screen we are about to use. */
Window RootWindow; /* The screen's root window. */
int Connection; /* The display's connection number */
Atom DeleteWindow; /* The window deletion atom */
Atom State; /* The state atom */
Atom StateFullScreen; /* The full screen atom */
#ifdef X_XF86VidModeGetModeLine
/*
* XF86VidMode may be compilable even if it fails at runtime. Therefore,
* the validity of the VidMode has to be tracked
*/
int DisplayModeValid; /* Flag that indicates runtime status*/
XF86VidModeModeLine DisplayMode; /* Current screen's display settings */
int DisplayModeClock; /* The display mode's refresh rate */
int DisplayViewPortX; /* saved X location of the viewport */
int DisplayViewPortY; /* saved Y location of the viewport */
int DisplayPointerX; /* saved X location of the pointer */
int DisplayPointerY; /* saved Y location of the pointer */
#endif /* X_XF86VidModeGetModeLine */
#elif TARGET_HOST_MS_WINDOWS
HINSTANCE Instance; /* The application's instance */
DEVMODE DisplayMode; /* Desktop's display settings */
#endif
int ScreenWidth; /* The screen's width in pixels */
int ScreenHeight; /* The screen's height in pixels */
int ScreenWidthMM; /* The screen's width in milimeters */
int ScreenHeightMM; /* The screen's height in milimeters */
};
/* The user can create any number of timer hooks */
typedef struct tagSFG_Timer SFG_Timer;
struct tagSFG_Timer
{
SFG_Node Node;
int ID; /* The timer ID integer */
FGCBTimer Callback; /* The timer callback */
long TriggerTime; /* The timer trigger time */
};
/*
* Make "freeglut" window handle and context types so that we don't need so
* much conditionally-compiled code later in the library.
*/
#if TARGET_HOST_POSIX_X11
typedef Window SFG_WindowHandleType ;
typedef GLXContext SFG_WindowContextType ;
#elif TARGET_HOST_MS_WINDOWS
typedef HWND SFG_WindowHandleType ;
typedef HGLRC SFG_WindowContextType ;
#endif
/*
* A window and its OpenGL context. The contents of this structure
* are highly dependant on the target operating system we aim at...
*/
typedef struct tagSFG_Context SFG_Context;
struct tagSFG_Context
{
SFG_WindowHandleType Handle; /* The window's handle */
SFG_WindowContextType Context; /* The window's OpenGL/WGL context */
#if TARGET_HOST_POSIX_X11
GLXFBConfig* FBConfig; /* The window's FBConfig */
#elif TARGET_HOST_MS_WINDOWS
HDC Device; /* The window's device context */
#endif
int DoubleBuffered; /* Treat the window as double-buffered */
};
/* Window's state description. This structure should be kept portable. */
typedef struct tagSFG_WindowState SFG_WindowState;
struct tagSFG_WindowState
{
int Width; /* Window's width in pixels */
int Height; /* The same about the height */
int OldWidth; /* Window width from before a resize */
int OldHeight; /* " height " " " " */
GLboolean Redisplay; /* Do we have to redisplay? */
GLboolean Visible; /* Is the window visible now */
int Cursor; /* The currently selected cursor */
long JoystickPollRate; /* The joystick polling rate */
long JoystickLastPoll; /* When the last poll happened */
int MouseX, MouseY; /* The most recent mouse position */
GLboolean IgnoreKeyRepeat; /* Whether to ignore key repeat. */
GLboolean KeyRepeating; /* Currently in repeat mode */
GLboolean NeedToResize; /* Do we need to resize the window? */
GLboolean IsFullscreen; /* is the window fullscreen? */
};
/*
* A generic function pointer. We should really use the GLUTproc type
* defined in freeglut_ext.h, but if we include that header in this file
* a bunch of other stuff (font-related) blows up!
*/
typedef void (*SFG_Proc)();
/*
* SET_WCB() is used as:
*
* SET_WCB( window, cbname, func );
*
* ...where {window} is the freeglut window to set the callback,
* {cbname} is the window-specific callback to set,
* {func} is a function-pointer.
*
* Originally, {FETCH_WCB( ... ) = func} was rather sloppily used,
* but this can cause warnings because the FETCH_WCB() macro type-
* casts its result, and a type-cast value shouldn't be an lvalue.
*
* The {if( FETCH_WCB( ... ) != func )} test is to do type-checking
* and for no other reason. Since it's hidden in the macro, the
* ugliness is felt to be rather benign.
*/
#define SET_WCB(window,cbname,func) \
do \
{ \
if( FETCH_WCB( window, cbname ) != (SFG_Proc)(func) ) \
(((window).CallBacks[CB_ ## cbname]) = (SFG_Proc)(func)); \
} while( 0 )
/*
* FETCH_WCB() is used as:
*
* FETCH_WCB( window, cbname );
*
* ...where {window} is the freeglut window to fetch the callback from,
* {cbname} is the window-specific callback to fetch.
*
* The result is correctly type-cast to the callback function pointer
* type.
*/
#define FETCH_WCB(window,cbname) \
((window).CallBacks[CB_ ## cbname])
/*
* INVOKE_WCB() is used as:
*
* INVOKE_WCB( window, cbname, ( arg_list ) );
*
* ...where {window} is the freeglut window,
* {cbname} is the window-specific callback to be invoked,
* {(arg_list)} is the parameter list.
*
* The callback is invoked as:
*
* callback( arg_list );
*
* ...so the parentheses are REQUIRED in the {arg_list}.
*
* NOTE that it does a sanity-check and also sets the
* current window.
*
*/
#if TARGET_HOST_MS_WINDOWS && !defined(_WIN32_WCE) /* FIXME: also WinCE? */
#define INVOKE_WCB(window,cbname,arg_list) \
do \
{ \
if( FETCH_WCB( window, cbname ) ) \
{ \
FGCB ## cbname func = (FGCB ## cbname)(FETCH_WCB( window, cbname )); \
fgSetWindow( &window ); \
func arg_list; \
} \
} while( 0 )
#else
#define INVOKE_WCB(window,cbname,arg_list) \
do \
{ \
if( FETCH_WCB( window, cbname ) ) \
{ \
fgSetWindow( &window ); \
((FGCB ## cbname)FETCH_WCB( window, cbname )) arg_list; \
} \
} while( 0 )
#endif
/*
* The window callbacks the user can supply us with. Should be kept portable.
*
* This enumeration provides the freeglut CallBack numbers.
* The symbolic constants are indices into a window's array of
* function callbacks. The names are formed by splicing a common
* prefix onto the callback's base name. (This was originally
* done so that an early stage of development could live side-by-
* side with the old callback code. The old callback code used
* the bare callback's name as a structure member, so I used a
* prefix for the array index name.)
*
* XXX For consistancy, perhaps the prefix should match the
* XXX FETCH* and INVOKE* macro suffices. I.e., WCB_, rather than
* XXX CB_.
*/
enum
{
CB_Display,
CB_Reshape,
CB_Keyboard,
CB_KeyboardUp,
CB_Special,
CB_SpecialUp,
CB_Mouse,
CB_MouseWheel,
CB_Motion,
CB_Passive,
CB_Entry,
CB_Visibility,
CB_WindowStatus,
CB_Joystick,
CB_Destroy,
/* Presently ignored */
CB_Select,
CB_OverlayDisplay,
CB_SpaceMotion, /* presently implemented only on UNIX/X11 */
CB_SpaceRotation, /* presently implemented only on UNIX/X11 */
CB_SpaceButton, /* presently implemented only on UNIX/X11 */
CB_Dials,
CB_ButtonBox,
CB_TabletMotion,
CB_TabletButton,
/* Always make this the LAST one */
TOTAL_CALLBACKS
};
/* This structure holds the OpenGL rendering context for all the menu windows */
typedef struct tagSFG_MenuContext SFG_MenuContext;
struct tagSFG_MenuContext
{
SFG_WindowContextType MContext; /* The menu window's WGL context */
};
/* This structure describes a menu */
typedef struct tagSFG_Window SFG_Window;
typedef struct tagSFG_MenuEntry SFG_MenuEntry;
typedef struct tagSFG_Menu SFG_Menu;
struct tagSFG_Menu
{
SFG_Node Node;
void *UserData; /* User data passed back at callback */
int ID; /* The global menu ID */
SFG_List Entries; /* The menu entries list */
FGCBMenu Callback; /* The menu callback */
FGCBDestroy Destroy; /* Destruction callback */
GLboolean IsActive; /* Is the menu selected? */
int Width; /* Menu box width in pixels */
int Height; /* Menu box height in pixels */
int X, Y; /* Menu box raster position */
SFG_MenuEntry *ActiveEntry; /* Currently active entry in the menu */
SFG_Window *Window; /* Window for menu */
SFG_Window *ParentWindow; /* Window in which the menu is invoked */
};
/* This is a menu entry */
struct tagSFG_MenuEntry
{
SFG_Node Node;
int ID; /* The menu entry ID (local) */
int Ordinal; /* The menu's ordinal number */
char* Text; /* The text to be displayed */
SFG_Menu* SubMenu; /* Optional sub-menu tree */
GLboolean IsActive; /* Is the entry highlighted? */
int Width; /* Label's width in pixels */
};
/*
* A window, making part of freeglut windows hierarchy.
* Should be kept portable.
*
* NOTE that ActiveMenu is set to menu itself if the window is a menu.
*/
struct tagSFG_Window
{
SFG_Node Node;
int ID; /* Window's ID number */
SFG_Context Window; /* Window and OpenGL context */
SFG_WindowState State; /* The window state */
SFG_Proc CallBacks[ TOTAL_CALLBACKS ]; /* Array of window callbacks */
void *UserData ; /* For use by user */
SFG_Menu* Menu[ FREEGLUT_MAX_MENUS ]; /* Menus appended to window */
SFG_Menu* ActiveMenu; /* The window's active menu */
SFG_Window* Parent; /* The parent to this window */
SFG_List Children; /* The subwindows d.l. list */
GLboolean IsMenu; /* Set to 1 if we are a menu */
};
/* A linked list structure of windows */
typedef struct tagSFG_WindowList SFG_WindowList ;
struct tagSFG_WindowList
{
SFG_Node node;
SFG_Window *window ;
};
/* This holds information about all the windows, menus etc. */
typedef struct tagSFG_Structure SFG_Structure;
struct tagSFG_Structure
{
SFG_List Windows; /* The global windows list */
SFG_List Menus; /* The global menus list */
SFG_List WindowsToDestroy;
SFG_Window* CurrentWindow; /* The currently set window */
SFG_Menu* CurrentMenu; /* Same, but menu... */
SFG_MenuContext* MenuContext; /* OpenGL rendering context for menus */
SFG_Window* GameModeWindow; /* The game mode window */
int WindowID; /* The new current window ID */
int MenuID; /* The new current menu ID */
};
/*
* This structure is used for the enumeration purposes.
* You can easily extend its functionalities by declaring
* a structure containing enumerator's contents and custom
* data, then casting its pointer to (SFG_Enumerator *).
*/
typedef struct tagSFG_Enumerator SFG_Enumerator;
struct tagSFG_Enumerator
{
GLboolean found; /* Used to terminate search */
void* data; /* Custom data pointer */
};
typedef void (* FGCBenumerator )( SFG_Window *, SFG_Enumerator * );
/* The bitmap font structure */
typedef struct tagSFG_Font SFG_Font;
struct tagSFG_Font
{
char* Name; /* The source font name */
int Quantity; /* Number of chars in font */
int Height; /* Height of the characters */
const GLubyte** Characters; /* The characters mapping */
float xorig, yorig; /* Relative origin of the character */
};
/* The stroke font structures */
typedef struct tagSFG_StrokeVertex SFG_StrokeVertex;
struct tagSFG_StrokeVertex
{
GLfloat X, Y;
};
typedef struct tagSFG_StrokeStrip SFG_StrokeStrip;
struct tagSFG_StrokeStrip
{
int Number;
const SFG_StrokeVertex* Vertices;
};
typedef struct tagSFG_StrokeChar SFG_StrokeChar;
struct tagSFG_StrokeChar
{
GLfloat Right;
int Number;
const SFG_StrokeStrip* Strips;
};
typedef struct tagSFG_StrokeFont SFG_StrokeFont;
struct tagSFG_StrokeFont
{
char* Name; /* The source font name */
int Quantity; /* Number of chars in font */
GLfloat Height; /* Height of the characters */
const SFG_StrokeChar** Characters; /* The characters mapping */
};
/* -- GLOBAL VARIABLES EXPORTS --------------------------------------------- */
/* Freeglut display related stuff (initialized once per session) */
extern SFG_Display fgDisplay;
/* Freeglut internal structure */
extern SFG_Structure fgStructure;
/* The current freeglut settings */
extern SFG_State fgState;
/* -- PRIVATE FUNCTION DECLARATIONS ---------------------------------------- */
/*
* A call to this function makes us sure that the Display and Structure
* subsystems have been properly initialized and are ready to be used
*/
#define FREEGLUT_EXIT_IF_NOT_INITIALISED( string ) \
if ( ! fgState.Initialised ) \
{ \
fgError ( " ERROR: Function <%s> called" \
" without first calling 'glutInit'.", (string) ) ; \
}
#define FREEGLUT_INTERNAL_ERROR_EXIT_IF_NOT_INITIALISED( string ) \
if ( ! fgState.Initialised ) \
{ \
fgError ( " ERROR: Internal <%s> function called" \
" without first calling 'glutInit'.", (string) ) ; \
}
#define FREEGLUT_INTERNAL_ERROR_EXIT( cond, string, function ) \
if ( ! ( cond ) ) \
{ \
fgError ( " ERROR: Internal error <%s> in function %s", \
(string), (function) ) ; \
}
/*
* Following definitions are somewhat similiar to GLib's,
* but do not generate any log messages:
*/
#define freeglut_return_if_fail( expr ) \
if( !(expr) ) \
return;
#define freeglut_return_val_if_fail( expr, val ) \
if( !(expr) ) \
return val ;
/*
* A call to those macros assures us that there is a current
* window set, respectively:
*/
#define FREEGLUT_EXIT_IF_NO_WINDOW( string ) \
if ( ! fgStructure.CurrentWindow ) \
{ \
fgError ( " ERROR: Function <%s> called" \
" with no current window defined.", (string) ) ; \
}
/*
* The deinitialize function gets called on glutMainLoop() end. It should clean up
* everything inside of the freeglut
*/
void fgDeinitialize( void );
/*
* Those two functions are used to create/destroy the freeglut internal
* structures. This actually happens when calling glutInit() and when
* quitting the glutMainLoop() (which actually happens, when all windows
* have been closed).
*/
void fgCreateStructure( void );
void fgDestroyStructure( void );
/* A helper function to check if a display mode is possible to use */
#if TARGET_HOST_POSIX_X11
GLXFBConfig* fgChooseFBConfig( void );
#endif
/* The window procedure for Win32 events handling */
#if TARGET_HOST_MS_WINDOWS
LRESULT CALLBACK fgWindowProc( HWND hWnd, UINT uMsg,
WPARAM wParam, LPARAM lParam );
void fgNewWGLCreateContext( SFG_Window* window );
GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly,
unsigned char layer_type );
#endif
/*
* Window creation, opening, closing and destruction.
* Also CallBack clearing/initialization.
* Defined in freeglut_structure.c, freeglut_window.c.
*/
SFG_Window* fgCreateWindow( SFG_Window* parent, const char* title,
GLboolean positionUse, int x, int y,
GLboolean sizeUse, int w, int h,
GLboolean gameMode, GLboolean isMenu );
void fgSetWindow ( SFG_Window *window );
void fgOpenWindow( SFG_Window* window, const char* title,
GLboolean positionUse, int x, int y,
GLboolean sizeUse, int w, int h,
GLboolean gameMode, GLboolean isSubWindow );
void fgCloseWindow( SFG_Window* window );
void fgAddToWindowDestroyList ( SFG_Window* window );
void fgCloseWindows ();
void fgDestroyWindow( SFG_Window* window );
/* Menu creation and destruction. Defined in freeglut_structure.c */
SFG_Menu* fgCreateMenu( FGCBMenu menuCallback );
void fgDestroyMenu( SFG_Menu* menu );
/* Joystick device management functions, defined in freeglut_joystick.c */
int fgJoystickDetect( void );
void fgInitialiseJoysticks( void );
void fgJoystickClose( void );
void fgJoystickPollWindow( SFG_Window* window );
/* InputDevice Initialisation and Closure */
int fgInputDeviceDetect( void );
void fgInitialiseInputDevices( void );
void fgInputDeviceClose( void );
/* spaceball device functions, defined in freeglut_spaceball.c */
void fgInitialiseSpaceball( void );
void fgSpaceballClose( void );
void fgSpaceballSetWindow( SFG_Window *window );
int fgHasSpaceball( void );
int fgSpaceballNumButtons( void );
#if TARGET_HOST_POSIX_X11
int fgIsSpaceballXEvent( const XEvent *ev );
void fgSpaceballHandleXEvent( const XEvent *ev );
#endif
/* Setting the cursor for a given window */
void fgSetCursor ( SFG_Window *window, int cursorID );
/*
* Helper function to enumerate through all registered windows
* and one to enumerate all of a window's subwindows...
*
* The GFunc callback for those functions will be defined as:
*
* void enumCallback( gpointer window, gpointer enumerator );
*
* where window is the enumerated (sub)window pointer (SFG_Window *),
* and userData is the a custom user-supplied pointer. Functions
* are defined and exported from freeglut_structure.c file.
*/
void fgEnumWindows( FGCBenumerator enumCallback, SFG_Enumerator* enumerator );
void fgEnumSubWindows( SFG_Window* window, FGCBenumerator enumCallback,
SFG_Enumerator* enumerator );
/*
* fgWindowByHandle returns a (SFG_Window *) value pointing to the
* first window in the queue matching the specified window handle.
* The function is defined in freeglut_structure.c file.
*/
SFG_Window* fgWindowByHandle( SFG_WindowHandleType hWindow );
/*
* This function is similiar to the previous one, except it is
* looking for a specified (sub)window identifier. The function
* is defined in freeglut_structure.c file.
*/
SFG_Window* fgWindowByID( int windowID );
/*
* Looks up a menu given its ID. This is easier than fgWindowByXXX
* as all menus are placed in a single doubly linked list...
*/
SFG_Menu* fgMenuByID( int menuID );
/*
* The menu activation and deactivation the code. This is the meat
* of the menu user interface handling code...
*/
void fgUpdateMenuHighlight ( SFG_Menu *menu );
GLboolean fgCheckActiveMenu ( SFG_Window *window, int button, GLboolean pressed,
int mouse_x, int mouse_y );
void fgDeactivateMenu( SFG_Window *window );
/*
* This function gets called just before the buffers swap, so that
* freeglut can display the pull-down menus via OpenGL. The function
* is defined in freeglut_menu.c file.
*/
void fgDisplayMenu( void );
/* Elapsed time as per glutGet(GLUT_ELAPSED_TIME). */
long fgElapsedTime( void );
/* System time in milliseconds */
long unsigned fgSystemTime(void);
/* List functions */
void fgListInit(SFG_List *list);
void fgListAppend(SFG_List *list, SFG_Node *node);
void fgListRemove(SFG_List *list, SFG_Node *node);
int fgListLength(SFG_List *list);
void fgListInsert(SFG_List *list, SFG_Node *next, SFG_Node *node);
/* Error Message functions */
void fgError( const char *fmt, ... );
void fgWarning( const char *fmt, ... );
/*
* Check if "hint" is present in "property" for "window". See freeglut_init.c
*/
#if TARGET_HOST_POSIX_X11
int fgHintPresent(Window window, Atom property, Atom hint);
#endif
SFG_Proc fghGetProcAddress( const char *procName );
#if TARGET_HOST_MS_WINDOWS
extern void (__cdecl *__glutExitFunc)( int return_value );
#endif
#endif /* FREEGLUT_INTERNAL_H */
/*** END OF FILE ***/