4 * Various freeglut initialization functions.
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 #define FREEGLUT_BUILDING_LIB
29 #include <GL/freeglut.h>
30 #include "freeglut_internal.h"
32 #if TARGET_HOST_POSIX_X11
33 #include <limits.h> /* LONG_MAX */
37 * TODO BEFORE THE STABLE RELEASE:
39 * fgDeinitialize() -- Win32's OK, X11 needs the OS-specific
40 * deinitialization done
41 * glutInitDisplayString() -- display mode string parsing
43 * Wouldn't it be cool to use gettext() for error messages? I just love
44 * bash saying "nie znaleziono pliku" instead of "file not found" :)
45 * Is gettext easily portable?
48 /* -- GLOBAL VARIABLES ----------------------------------------------------- */
51 * A structure pointed by g_pDisplay holds all information
52 * regarding the display, screen, root window etc.
54 SFG_Display fgDisplay;
57 * The settings for the current freeglut session
59 SFG_State fgState = { { -1, -1, GL_FALSE }, /* Position */
60 { 300, 300, GL_TRUE }, /* Size */
61 GLUT_RGBA | GLUT_SINGLE | GLUT_DEPTH, /* DisplayMode */
62 GL_FALSE, /* Initialised */
63 GLUT_TRY_DIRECT_CONTEXT, /* DirectContext */
64 GL_FALSE, /* ForceIconic */
65 GL_FALSE, /* UseCurrentContext */
66 GL_FALSE, /* GLDebugSwitch */
67 GL_FALSE, /* XSyncSwitch */
68 GLUT_KEY_REPEAT_ON, /* KeyRepeat */
69 INVALID_MODIFIERS, /* Modifiers */
74 { NULL, NULL }, /* Timers */
75 { NULL, NULL }, /* FreeTimers */
76 NULL, /* IdleCallback */
78 NULL, /* MenuStateCallback */
79 NULL, /* MenuStatusCallback */
80 { 640, 480, GL_TRUE }, /* GameModeSize */
81 16, /* GameModeDepth */
82 72, /* GameModeRefresh */
83 GLUT_ACTION_EXIT, /* ActionOnWindowClose */
84 GLUT_EXEC_STATE_INIT, /* ExecState */
85 NULL, /* ProgramName */
86 GL_FALSE, /* JoysticksInitialised */
87 0, /* NumActiveJoysticks */
88 GL_FALSE, /* InputDevsInitialised */
89 1, /* AuxiliaryBufferNumber */
94 0 /* ContextProfile */
98 /* -- PRIVATE FUNCTIONS ---------------------------------------------------- */
100 #if TARGET_HOST_POSIX_X11
102 /* Return the atom associated with "name". */
103 static Atom fghGetAtom(const char * name)
105 return XInternAtom(fgDisplay.Display, name, False);
109 * Check if "property" is set on "window". The property's values are returned
110 * through "data". If the property is set and is of type "type", return the
111 * number of elements in "data". Return zero otherwise. In both cases, use
112 * "Xfree()" to free "data".
114 static int fghGetWindowProperty(Window window,
117 unsigned char ** data)
120 * Caller always has to use "Xfree()" to free "data", since
121 * "XGetWindowProperty() always allocates one extra byte in prop_return
122 * [i.e. "data"] (even if the property is zero length) [..]".
125 int status; /* Returned by "XGetWindowProperty". */
128 int temp_format; /* Not used. */
129 unsigned long number_of_elements;
130 unsigned long temp_bytes_after; /* Not used. */
133 status = XGetWindowProperty(fgDisplay.Display,
146 FREEGLUT_INTERNAL_ERROR_EXIT(status == Success,
147 "XGetWindowProperty failled",
148 "fghGetWindowProperty");
150 if (type_returned != type)
152 number_of_elements = 0;
155 return number_of_elements;
158 /* Check if the window manager is NET WM compliant. */
159 static int fghNetWMSupported(void)
162 Window ** window_ptr_1;
164 int number_of_windows;
165 int net_wm_supported;
168 net_wm_supported = 0;
170 wm_check = fghGetAtom("_NET_SUPPORTING_WM_CHECK");
171 window_ptr_1 = malloc(sizeof(Window *));
174 * Check that the window manager has set this property on the root window.
175 * The property must be the ID of a child window.
177 number_of_windows = fghGetWindowProperty(fgDisplay.RootWindow,
180 (unsigned char **) window_ptr_1);
181 if (number_of_windows == 1)
183 Window ** window_ptr_2;
185 window_ptr_2 = malloc(sizeof(Window *));
187 /* Check that the window has the same property set to the same value. */
188 number_of_windows = fghGetWindowProperty(**window_ptr_1,
191 (unsigned char **) window_ptr_2);
192 if ((number_of_windows == 1) && (**window_ptr_1 == **window_ptr_2))
194 /* NET WM compliant */
195 net_wm_supported = 1;
198 XFree(*window_ptr_2);
202 XFree(*window_ptr_1);
205 return net_wm_supported;
208 /* Check if "hint" is present in "property" for "window". */
209 int fgHintPresent(Window window, Atom property, Atom hint)
218 atoms_ptr = malloc(sizeof(Atom *));
219 number_of_atoms = fghGetWindowProperty(window,
222 (unsigned char **) atoms_ptr);
223 for (i = 0; i < number_of_atoms; i++)
225 if ((*atoms_ptr)[i] == hint)
235 #endif /* TARGET_HOST_POSIX_X11 */
239 * A call to this function should initialize all the display stuff...
241 static void fghInitialize( const char* displayName )
243 #if TARGET_HOST_POSIX_X11
244 fgDisplay.Display = XOpenDisplay( displayName );
246 if( fgDisplay.Display == NULL )
247 fgError( "failed to open display '%s'", XDisplayName( displayName ) );
249 if( !glXQueryExtension( fgDisplay.Display, NULL, NULL ) )
250 fgError( "OpenGL GLX extension not supported by display '%s'",
251 XDisplayName( displayName ) );
253 fgDisplay.Screen = DefaultScreen( fgDisplay.Display );
254 fgDisplay.RootWindow = RootWindow(
259 fgDisplay.ScreenWidth = DisplayWidth(
263 fgDisplay.ScreenHeight = DisplayHeight(
268 fgDisplay.ScreenWidthMM = DisplayWidthMM(
272 fgDisplay.ScreenHeightMM = DisplayHeightMM(
277 fgDisplay.Connection = ConnectionNumber( fgDisplay.Display );
279 /* Create the window deletion atom */
280 fgDisplay.DeleteWindow = fghGetAtom("WM_DELETE_WINDOW");
282 /* Create the state and full screen atoms */
283 fgDisplay.State = None;
284 fgDisplay.StateFullScreen = None;
286 if (fghNetWMSupported())
288 const Atom supported = fghGetAtom("_NET_SUPPORTED");
289 const Atom state = fghGetAtom("_NET_WM_STATE");
291 /* Check if the state hint is supported. */
292 if (fgHintPresent(fgDisplay.RootWindow, supported, state))
294 const Atom full_screen = fghGetAtom("_NET_WM_STATE_FULLSCREEN");
296 fgDisplay.State = state;
298 /* Check if the window manager supports full screen. */
299 /** Check "_NET_WM_ALLOWED_ACTIONS" on our window instead? **/
300 if (fgHintPresent(fgDisplay.RootWindow, supported, full_screen))
302 fgDisplay.StateFullScreen = full_screen;
307 #elif TARGET_HOST_MS_WINDOWS
312 /* What we need to do is to initialize the fgDisplay global structure here. */
313 fgDisplay.Instance = GetModuleHandle( NULL );
315 atom = GetClassInfo( fgDisplay.Instance, _T("FREEGLUT"), &wc );
319 ZeroMemory( &wc, sizeof(WNDCLASS) );
322 * Each of the windows should have its own device context, and we
323 * want redraw events during Vertical and Horizontal Resizes by
326 * XXX Old code had "| CS_DBCLCKS" commented out. Plans for the
327 * XXX future? Dead-end idea?
329 wc.lpfnWndProc = fgWindowProc;
332 wc.hInstance = fgDisplay.Instance;
333 wc.hIcon = LoadIcon( fgDisplay.Instance, _T("GLUT_ICON") );
335 #if defined(_WIN32_WCE)
336 wc.style = CS_HREDRAW | CS_VREDRAW;
338 wc.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
340 wc.hIcon = LoadIcon( NULL, IDI_WINLOGO );
343 wc.hCursor = LoadCursor( NULL, IDC_ARROW );
344 wc.hbrBackground = NULL;
345 wc.lpszMenuName = NULL;
346 wc.lpszClassName = _T("FREEGLUT");
348 /* Register the window class */
349 atom = RegisterClass( &wc );
350 FREEGLUT_INTERNAL_ERROR_EXIT ( atom, "Window Class Not Registered", "fghInitialize" );
353 /* The screen dimensions can be obtained via GetSystemMetrics() calls */
354 fgDisplay.ScreenWidth = GetSystemMetrics( SM_CXSCREEN );
355 fgDisplay.ScreenHeight = GetSystemMetrics( SM_CYSCREEN );
358 HWND desktop = GetDesktopWindow( );
359 HDC context = GetDC( desktop );
361 fgDisplay.ScreenWidthMM = GetDeviceCaps( context, HORZSIZE );
362 fgDisplay.ScreenHeightMM = GetDeviceCaps( context, VERTSIZE );
364 ReleaseDC( desktop, context );
367 /* Set the timer granularity to 1 ms */
368 timeBeginPeriod ( 1 );
372 fgState.Initialised = GL_TRUE;
374 /* InputDevice uses GlutTimerFunc(), so fgState.Initialised must be TRUE */
375 fgInitialiseInputDevices();
379 * Perform the freeglut deinitialization...
381 void fgDeinitialize( void )
385 if( !fgState.Initialised )
387 fgWarning( "fgDeinitialize(): "
388 "no valid initialization has been performed" );
392 /* If there was a menu created, destroy the rendering context */
393 if( fgStructure.MenuContext )
395 #if TARGET_HOST_POSIX_X11
396 /* Note that the MVisualInfo is not owned by the MenuContext! */
397 glXDestroyContext( fgDisplay.Display, fgStructure.MenuContext->MContext );
399 free( fgStructure.MenuContext );
400 fgStructure.MenuContext = NULL;
403 fgDestroyStructure( );
405 while( ( timer = fgState.Timers.First) )
407 fgListRemove( &fgState.Timers, &timer->Node );
411 while( ( timer = fgState.FreeTimers.First) )
413 fgListRemove( &fgState.FreeTimers, &timer->Node );
417 #if !defined(_WIN32_WCE)
418 if ( fgState.JoysticksInitialised )
421 if ( fgState.InputDevsInitialised )
422 fgInputDeviceClose( );
423 #endif /* !defined(_WIN32_WCE) */
424 fgState.JoysticksInitialised = GL_FALSE;
425 fgState.InputDevsInitialised = GL_FALSE;
427 fgState.MajorVersion = 1;
428 fgState.MinorVersion = 0;
429 fgState.ContextFlags = 0;
430 fgState.ContextProfile = 0;
432 fgState.Initialised = GL_FALSE;
434 fgState.Position.X = -1;
435 fgState.Position.Y = -1;
436 fgState.Position.Use = GL_FALSE;
438 fgState.Size.X = 300;
439 fgState.Size.Y = 300;
440 fgState.Size.Use = GL_TRUE;
442 fgState.DisplayMode = GLUT_RGBA | GLUT_SINGLE | GLUT_DEPTH;
444 fgState.DirectContext = GLUT_TRY_DIRECT_CONTEXT;
445 fgState.ForceIconic = GL_FALSE;
446 fgState.UseCurrentContext = GL_FALSE;
447 fgState.GLDebugSwitch = GL_FALSE;
448 fgState.XSyncSwitch = GL_FALSE;
449 fgState.ActionOnWindowClose = GLUT_ACTION_EXIT;
450 fgState.ExecState = GLUT_EXEC_STATE_INIT;
452 fgState.KeyRepeat = GLUT_KEY_REPEAT_ON;
453 fgState.Modifiers = INVALID_MODIFIERS;
455 fgState.GameModeSize.X = 640;
456 fgState.GameModeSize.Y = 480;
457 fgState.GameModeDepth = 16;
458 fgState.GameModeRefresh = 72;
460 fgListInit( &fgState.Timers );
461 fgListInit( &fgState.FreeTimers );
463 fgState.IdleCallback = NULL;
464 fgState.MenuStateCallback = ( FGCBMenuState )NULL;
465 fgState.MenuStatusCallback = ( FGCBMenuStatus )NULL;
467 fgState.SwapCount = 0;
468 fgState.SwapTime = 0;
469 fgState.FPSInterval = 0;
471 if( fgState.ProgramName )
473 free( fgState.ProgramName );
474 fgState.ProgramName = NULL;
477 #if TARGET_HOST_POSIX_X11
480 * Make sure all X-client data we have created will be destroyed on
483 XSetCloseDownMode( fgDisplay.Display, DestroyAll );
486 * Close the display connection, destroying all windows we have
489 XCloseDisplay( fgDisplay.Display );
491 #elif TARGET_HOST_MS_WINDOWS
493 /* Reset the timer granularity */
498 fgState.Initialised = GL_FALSE;
502 * Everything inside the following #ifndef is copied from the X sources.
505 #if TARGET_HOST_MS_WINDOWS
509 Copyright 1985, 1986, 1987,1998 The Open Group
511 Permission to use, copy, modify, distribute, and sell this software and its
512 documentation for any purpose is hereby granted without fee, provided that
513 the above copyright notice appear in all copies and that both that
514 copyright notice and this permission notice appear in supporting
517 The above copyright notice and this permission notice shall be included
518 in all copies or substantial portions of the Software.
520 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
521 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
522 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
523 IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
524 OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
525 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
526 OTHER DEALINGS IN THE SOFTWARE.
528 Except as contained in this notice, the name of The Open Group shall
529 not be used in advertising or otherwise to promote the sale, use or
530 other dealings in this Software without prior written authorization
535 #define NoValue 0x0000
536 #define XValue 0x0001
537 #define YValue 0x0002
538 #define WidthValue 0x0004
539 #define HeightValue 0x0008
540 #define AllValues 0x000F
541 #define XNegative 0x0010
542 #define YNegative 0x0020
545 * XParseGeometry parses strings of the form
546 * "=<width>x<height>{+-}<xoffset>{+-}<yoffset>", where
547 * width, height, xoffset, and yoffset are unsigned integers.
548 * Example: "=80x24+300-49"
549 * The equal sign is optional.
550 * It returns a bitmask that indicates which of the four values
551 * were actually found in the string. For each value found,
552 * the corresponding argument is updated; for each value
553 * not found, the corresponding argument is left unchanged.
557 ReadInteger(char *string, char **NextString)
559 register int Result = 0;
564 else if (*string == '-')
569 for (; (*string >= '0') && (*string <= '9'); string++)
571 Result = (Result * 10) + (*string - '0');
573 *NextString = string;
580 static int XParseGeometry (
584 unsigned int *width, /* RETURN */
585 unsigned int *height) /* RETURN */
588 register char *strind;
589 unsigned int tempWidth = 0, tempHeight = 0;
590 int tempX = 0, tempY = 0;
593 if ( (string == NULL) || (*string == '\0'))
596 string++; /* ignore possible '=' at beg of geometry spec */
598 strind = (char *)string;
599 if (*strind != '+' && *strind != '-' && *strind != 'x') {
600 tempWidth = ReadInteger(strind, &nextCharacter);
601 if (strind == nextCharacter)
603 strind = nextCharacter;
607 if (*strind == 'x' || *strind == 'X') {
609 tempHeight = ReadInteger(strind, &nextCharacter);
610 if (strind == nextCharacter)
612 strind = nextCharacter;
616 if ((*strind == '+') || (*strind == '-')) {
617 if (*strind == '-') {
619 tempX = -ReadInteger(strind, &nextCharacter);
620 if (strind == nextCharacter)
622 strind = nextCharacter;
628 tempX = ReadInteger(strind, &nextCharacter);
629 if (strind == nextCharacter)
631 strind = nextCharacter;
634 if ((*strind == '+') || (*strind == '-')) {
635 if (*strind == '-') {
637 tempY = -ReadInteger(strind, &nextCharacter);
638 if (strind == nextCharacter)
640 strind = nextCharacter;
646 tempY = ReadInteger(strind, &nextCharacter);
647 if (strind == nextCharacter)
649 strind = nextCharacter;
655 /* If strind isn't at the end of the string the it's an invalid
656 geometry specification. */
658 if (*strind != '\0') return 0;
664 if (mask & WidthValue)
666 if (mask & HeightValue)
667 *height = tempHeight;
672 /* -- INTERFACE FUNCTIONS -------------------------------------------------- */
675 * Perform initialization. This usually happens on the program startup
676 * and restarting after glutMainLoop termination...
678 void FGAPIENTRY glutInit( int* pargc, char** argv )
680 char* displayName = NULL;
681 char* geometry = NULL;
682 int i, j, argc = *pargc;
684 if( fgState.Initialised )
685 fgError( "illegal glutInit() reinitialization attempt" );
687 if (pargc && *pargc && argv && *argv && **argv)
689 fgState.ProgramName = strdup (*argv);
691 if( !fgState.ProgramName )
692 fgError ("Could not allocate space for the program's name.");
695 fgCreateStructure( );
698 fgState.Time = fgSystemTime();
700 /* check if GLUT_FPS env var is set */
703 const char *fps = getenv( "GLUT_FPS" );
708 sscanf( fps, "%d", &interval );
711 fgState.FPSInterval = 5000; /* 5000 millisecond default */
713 fgState.FPSInterval = interval;
717 displayName = getenv( "DISPLAY" );
719 for( i = 1; i < argc; i++ )
721 if( strcmp( argv[ i ], "-display" ) == 0 )
724 fgError( "-display parameter must be followed by display name" );
726 displayName = argv[ i ];
728 argv[ i - 1 ] = NULL;
732 else if( strcmp( argv[ i ], "-geometry" ) == 0 )
735 fgError( "-geometry parameter must be followed by window "
736 "geometry settings" );
738 geometry = argv[ i ];
740 argv[ i - 1 ] = NULL;
744 else if( strcmp( argv[ i ], "-direct" ) == 0)
746 if( fgState.DirectContext == GLUT_FORCE_INDIRECT_CONTEXT )
747 fgError( "parameters ambiguity, -direct and -indirect "
748 "cannot be both specified" );
750 fgState.DirectContext = GLUT_FORCE_DIRECT_CONTEXT;
754 else if( strcmp( argv[ i ], "-indirect" ) == 0 )
756 if( fgState.DirectContext == GLUT_FORCE_DIRECT_CONTEXT )
757 fgError( "parameters ambiguity, -direct and -indirect "
758 "cannot be both specified" );
760 fgState.DirectContext = GLUT_FORCE_INDIRECT_CONTEXT;
764 else if( strcmp( argv[ i ], "-iconic" ) == 0 )
766 fgState.ForceIconic = GL_TRUE;
770 else if( strcmp( argv[ i ], "-gldebug" ) == 0 )
772 fgState.GLDebugSwitch = GL_TRUE;
776 else if( strcmp( argv[ i ], "-sync" ) == 0 )
778 fgState.XSyncSwitch = GL_TRUE;
784 /* Compact {argv}. */
785 for( i = j = 1; i < *pargc; i++, j++ )
787 /* Guaranteed to end because there are "*pargc" arguments left */
788 while ( argv[ j ] == NULL )
791 argv[ i ] = argv[ j ];
794 #endif /* _WIN32_WCE */
797 * Have the display created now. If there wasn't a "-display"
798 * in the program arguments, we will use the DISPLAY environment
799 * variable for opening the X display (see code above):
801 fghInitialize( displayName );
804 * Geometry parsing deffered until here because we may need the screen
810 unsigned int parsedWidth, parsedHeight;
811 int mask = XParseGeometry( geometry,
812 &fgState.Position.X, &fgState.Position.Y,
813 &parsedWidth, &parsedHeight );
814 /* TODO: Check for overflow? */
815 fgState.Size.X = parsedWidth;
816 fgState.Size.Y = parsedHeight;
818 if( (mask & (WidthValue|HeightValue)) == (WidthValue|HeightValue) )
819 fgState.Size.Use = GL_TRUE;
821 if( mask & XNegative )
822 fgState.Position.X += fgDisplay.ScreenWidth - fgState.Size.X;
824 if( mask & YNegative )
825 fgState.Position.Y += fgDisplay.ScreenHeight - fgState.Size.Y;
827 if( (mask & (XValue|YValue)) == (XValue|YValue) )
828 fgState.Position.Use = GL_TRUE;
832 #if TARGET_HOST_MS_WINDOWS
833 void (__cdecl *__glutExitFunc)( int return_value ) = NULL;
835 void FGAPIENTRY __glutInitWithExit( int *pargc, char **argv, void (__cdecl *exit_function)(int) )
837 __glutExitFunc = exit_function;
838 glutInit(pargc, argv);
843 * Undoes all the "glutInit" stuff
845 void FGAPIENTRY glutExit ( void )
851 * Sets the default initial window position for new windows
853 void FGAPIENTRY glutInitWindowPosition( int x, int y )
855 fgState.Position.X = x;
856 fgState.Position.Y = y;
858 if( ( x >= 0 ) && ( y >= 0 ) )
859 fgState.Position.Use = GL_TRUE;
861 fgState.Position.Use = GL_FALSE;
865 * Sets the default initial window size for new windows
867 void FGAPIENTRY glutInitWindowSize( int width, int height )
869 fgState.Size.X = width;
870 fgState.Size.Y = height;
872 if( ( width > 0 ) && ( height > 0 ) )
873 fgState.Size.Use = GL_TRUE;
875 fgState.Size.Use = GL_FALSE;
879 * Sets the default display mode for all new windows
881 void FGAPIENTRY glutInitDisplayMode( unsigned int displayMode )
883 /* We will make use of this value when creating a new OpenGL context... */
884 fgState.DisplayMode = displayMode;
888 /* -- INIT DISPLAY STRING PARSING ------------------------------------------ */
890 static char* Tokens[] =
892 "alpha", "acca", "acc", "blue", "buffer", "conformant", "depth", "double",
893 "green", "index", "num", "red", "rgba", "rgb", "luminance", "stencil",
894 "single", "stereo", "samples", "slow", "win32pdf", "win32pfd", "xvisual",
895 "xstaticgray", "xgrayscale", "xstaticcolor", "xpseudocolor",
896 "xtruecolor", "xdirectcolor",
897 "xstaticgrey", "xgreyscale", "xstaticcolour", "xpseudocolour",
898 "xtruecolour", "xdirectcolour", "borderless", "aux"
900 #define NUM_TOKENS (sizeof(Tokens) / sizeof(*Tokens))
902 void FGAPIENTRY glutInitDisplayString( const char* displayMode )
904 int glut_state_flag = 0 ;
906 * Unpack a lot of options from a character string. The options are
907 * delimited by blanks or tabs.
910 size_t len = strlen ( displayMode );
911 char *buffer = (char *)malloc ( (len+1) * sizeof(char) );
912 memcpy ( buffer, displayMode, len );
915 token = strtok ( buffer, " \t" );
919 /* Process this token */
922 /* Temporary fix: Ignore any length specifications and at least
923 * process the basic token
924 * TODO: Fix this permanently
926 size_t cleanlength = strcspn ( token, "=<>~!" );
928 for ( i = 0; i < NUM_TOKENS; i++ )
930 if ( strncmp ( token, Tokens[i], cleanlength ) == 0 ) break ;
935 case 0 : /* "alpha": Alpha color buffer precision in bits */
936 glut_state_flag |= GLUT_ALPHA ; /* Somebody fix this for me! */
939 case 1 : /* "acca": Red, green, blue, and alpha accumulation buffer
943 case 2 : /* "acc": Red, green, and blue accumulation buffer precision
944 in bits with zero bits alpha */
945 glut_state_flag |= GLUT_ACCUM ; /* Somebody fix this for me! */
948 case 3 : /* "blue": Blue color buffer precision in bits */
951 case 4 : /* "buffer": Number of bits in the color index color buffer
955 case 5 : /* "conformant": Boolean indicating if the frame buffer
956 configuration is conformant or not */
959 case 6 : /* "depth": Number of bits of precsion in the depth buffer */
960 glut_state_flag |= GLUT_DEPTH ; /* Somebody fix this for me! */
963 case 7 : /* "double": Boolean indicating if the color buffer is
965 glut_state_flag |= GLUT_DOUBLE ;
968 case 8 : /* "green": Green color buffer precision in bits */
971 case 9 : /* "index": Boolean if the color model is color index or not
973 glut_state_flag |= GLUT_INDEX ;
976 case 10 : /* "num": A special capability name indicating where the
977 value represents the Nth frame buffer configuration
978 matching the description string */
981 case 11 : /* "red": Red color buffer precision in bits */
984 case 12 : /* "rgba": Number of bits of red, green, blue, and alpha in
985 the RGBA color buffer */
986 glut_state_flag |= GLUT_RGBA ; /* Somebody fix this for me! */
989 case 13 : /* "rgb": Number of bits of red, green, and blue in the
990 RGBA color buffer with zero bits alpha */
991 glut_state_flag |= GLUT_RGB ; /* Somebody fix this for me! */
994 case 14 : /* "luminance": Number of bits of red in the RGBA and zero
995 bits of green, blue (alpha not specified) of color buffer
997 glut_state_flag |= GLUT_LUMINANCE ; /* Somebody fix this for me! */
1000 case 15 : /* "stencil": Number of bits in the stencil buffer */
1001 glut_state_flag |= GLUT_STENCIL; /* Somebody fix this for me! */
1004 case 16 : /* "single": Boolean indicate the color buffer is single
1006 glut_state_flag |= GLUT_SINGLE ;
1009 case 17 : /* "stereo": Boolean indicating the color buffer supports
1010 OpenGL-style stereo */
1011 glut_state_flag |= GLUT_STEREO ;
1014 case 18 : /* "samples": Indicates the number of multisamples to use
1015 based on GLX's SGIS_multisample extension (for
1017 glut_state_flag |= GLUT_MULTISAMPLE ; /*Somebody fix this for me!*/
1020 case 19 : /* "slow": Boolean indicating if the frame buffer
1021 configuration is slow or not */
1024 case 20 : /* "win32pdf": (incorrect spelling but was there before */
1025 case 21 : /* "win32pfd": matches the Win32 Pixel Format Descriptor by
1027 #if TARGET_HOST_MS_WINDOWS
1031 case 22 : /* "xvisual": matches the X visual ID by number */
1032 #if TARGET_HOST_POSIX_X11
1036 case 23 : /* "xstaticgray": */
1037 case 29 : /* "xstaticgrey": boolean indicating if the frame buffer
1038 configuration's X visual is of type StaticGray */
1039 #if TARGET_HOST_POSIX_X11
1043 case 24 : /* "xgrayscale": */
1044 case 30 : /* "xgreyscale": boolean indicating if the frame buffer
1045 configuration's X visual is of type GrayScale */
1046 #if TARGET_HOST_POSIX_X11
1050 case 25 : /* "xstaticcolor": */
1051 case 31 : /* "xstaticcolour": boolean indicating if the frame buffer
1052 configuration's X visual is of type StaticColor */
1053 #if TARGET_HOST_POSIX_X11
1057 case 26 : /* "xpseudocolor": */
1058 case 32 : /* "xpseudocolour": boolean indicating if the frame buffer
1059 configuration's X visual is of type PseudoColor */
1060 #if TARGET_HOST_POSIX_X11
1064 case 27 : /* "xtruecolor": */
1065 case 33 : /* "xtruecolour": boolean indicating if the frame buffer
1066 configuration's X visual is of type TrueColor */
1067 #if TARGET_HOST_POSIX_X11
1071 case 28 : /* "xdirectcolor": */
1072 case 34 : /* "xdirectcolour": boolean indicating if the frame buffer
1073 configuration's X visual is of type DirectColor */
1074 #if TARGET_HOST_POSIX_X11
1078 case 35 : /* "borderless": windows should not have borders */
1079 #if TARGET_HOST_POSIX_X11
1083 case 36 : /* "aux": some number of aux buffers */
1084 glut_state_flag |= GLUT_AUX;
1087 case 37 : /* Unrecognized */
1088 fgWarning ( "WARNING - Display string token not recognized: %s",
1093 token = strtok ( NULL, " \t" );
1098 /* We will make use of this value when creating a new OpenGL context... */
1099 fgState.DisplayMode = glut_state_flag;
1102 /* -- SETTING OPENGL 3.0 CONTEXT CREATION PARAMETERS ---------------------- */
1104 void FGAPIENTRY glutInitContextVersion( int majorVersion, int minorVersion )
1106 /* We will make use of these valuse when creating a new OpenGL context... */
1107 fgState.MajorVersion = majorVersion;
1108 fgState.MinorVersion = minorVersion;
1112 void FGAPIENTRY glutInitContextFlags( int flags )
1114 /* We will make use of this value when creating a new OpenGL context... */
1115 fgState.ContextFlags = flags;
1118 void FGAPIENTRY glutInitContextProfile( int profile )
1120 /* We will make use of this value when creating a new OpenGL context... */
1121 fgState.ContextProfile = profile;
1124 /*** END OF FILE ***/