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.
32 #define G_LOG_DOMAIN "freeglut-init"
34 #include "../include/GL/freeglut.h"
35 #include "../include/GL/freeglut_internal.h"
38 * TODO BEFORE THE STABLE RELEASE:
40 * fgDeinitialize() -- Win32's OK, X11 needs the OS-specific deinitialization done
41 * glutInitDisplayString() -- display mode string parsing
43 * Wouldn't it be cool to use gettext() for error messages? I just love bash saying
44 * "nie znaleziono pliku" instead of "file not found" :) Is gettext easily portable?
47 /* -- GLOBAL VARIABLES ----------------------------------------------------- */
50 * A structure pointed by g_pDisplay holds all information
51 * regarding the display, screen, root window etc.
53 SFG_Display fgDisplay;
56 * The settings for the current freeglut session
58 SFG_State fgState = { { -1, -1, FALSE }, { 300, 300, TRUE }, GLUT_RGBA | GLUT_SINGLE | GLUT_DEPTH,
59 FALSE, TRUE, FALSE, FALSE, FALSE, TRUE,
60 #ifdef TARGET_HOST_WIN32
65 { NULL, NULL }, NULL, NULL, NULL, { 640, 480, TRUE }, 16, 72, GLUT_ACTION_EXIT, GLUT_EXEC_STATE_INIT } ;
68 /* -- PRIVATE FUNCTIONS ---------------------------------------------------- */
71 * A call to this function should initialize all the display stuff...
73 void fgInitialize( const char* displayName )
75 #if TARGET_HOST_UNIX_X11
77 * Have the display created
79 fgDisplay.Display = XOpenDisplay( displayName );
81 if( fgDisplay.Display == NULL )
84 * Failed to open a display. That's no good.
86 fgError( "failed to open display '%s'", XDisplayName( displayName ) );
90 * Check for the OpenGL GLX extension availability:
92 if( !glXQueryExtension( fgDisplay.Display, NULL, NULL ) )
95 * GLX extensions have not been found...
97 fgError( "OpenGL GLX extension not supported by display '%s'", XDisplayName( displayName ) );
101 * Grab the default screen for the display we have just opened
103 fgDisplay.Screen = DefaultScreen( fgDisplay.Display );
106 * The same applying to the root window
108 fgDisplay.RootWindow = RootWindow(
114 * Grab the logical screen's geometry
116 fgDisplay.ScreenWidth = DisplayWidth(
121 fgDisplay.ScreenHeight = DisplayHeight(
127 * Grab the physical screen's geometry
129 fgDisplay.ScreenWidthMM = DisplayWidthMM(
134 fgDisplay.ScreenHeightMM = DisplayHeightMM(
140 * The display's connection number
142 fgDisplay.Connection = ConnectionNumber( fgDisplay.Display );
145 * Create the window deletion atom
147 fgDisplay.DeleteWindow = XInternAtom(
153 #elif TARGET_HOST_WIN32
159 * What we need to do is to initialize the fgDisplay global structure here...
161 fgDisplay.Instance = GetModuleHandle( NULL );
164 * Check if the freeglut window class has been registered before...
166 atom = GetClassInfo( fgDisplay.Instance, "FREEGLUT", &wc );
169 * ...nope, it has not, and we have to do it right now:
174 * Make sure the unitialized fields are reset to zero
176 ZeroMemory( &wc, sizeof(WNDCLASS) );
179 * Each of the windows should have its own device context...
182 wc.lpfnWndProc = fgWindowProc;
185 wc.hInstance = fgDisplay.Instance;
186 wc.hIcon = LoadIcon( NULL, IDI_WINLOGO );
187 wc.hCursor = LoadCursor( NULL, IDC_ARROW );
188 wc.hbrBackground = NULL;
189 wc.lpszMenuName = NULL;
190 wc.lpszClassName = "FREEGLUT";
193 * Register the window class
195 atom = RegisterClass( &wc );
200 * The screen dimensions can be obtained via GetSystemMetrics() calls
202 fgDisplay.ScreenWidth = GetSystemMetrics( SM_CXSCREEN );
203 fgDisplay.ScreenHeight = GetSystemMetrics( SM_CYSCREEN );
207 * Checking the display's size in millimeters isn't too hard, too:
209 HWND desktop = GetDesktopWindow();
210 HDC context = GetDC( desktop );
213 * Grab the appropriate values now (HORZSIZE and VERTSIZE respectably):
215 fgDisplay.ScreenWidthMM = GetDeviceCaps( context, HORZSIZE );
216 fgDisplay.ScreenHeightMM = GetDeviceCaps( context, VERTSIZE );
219 * Whoops, forgot to release the device context :)
221 ReleaseDC( desktop, context );
227 * Have the joystick device initialized now
233 * Perform the freeglut deinitialization...
235 void fgDeinitialize( void )
240 * Check if initialization has been performed before
242 if( !fgState.Time.Set )
244 fgWarning( "fgDeinitialize(): fgState.Timer is null => no valid initialization has been performed" );
249 * Perform the freeglut structure deinitialization
251 fgDestroyStructure();
254 * Delete all the timers and their storage list
256 while ( (timer = fgState.Timers.First) != NULL )
258 fgListRemove ( &fgState.Timers, &timer->Node ) ;
263 * Deinitialize the joystick device
268 * Reset the state structure
271 fgState.Position.X = -1 ;
272 fgState.Position.Y = -1 ;
273 fgState.Position.Use = FALSE ;
275 fgState.Size.X = 300 ;
276 fgState.Size.Y = 300 ;
277 fgState.Size.Use = TRUE ;
280 * The default display mode to be used
282 fgState.DisplayMode = GLUT_RGBA | GLUT_SINGLE | GLUT_DEPTH;
284 fgState.ForceDirectContext = FALSE;
285 fgState.TryDirectContext = TRUE;
286 fgState.ForceIconic = FALSE;
287 fgState.GLDebugSwitch = FALSE;
288 fgState.XSyncSwitch = FALSE;
289 fgState.ActionOnWindowClose = GLUT_ACTION_EXIT ;
290 fgState.ExecState = GLUT_EXEC_STATE_INIT ;
293 * Assume we want to ignore the automatic key repeat
295 fgState.IgnoreKeyRepeat = TRUE;
298 * Set the default game mode settings
300 fgState.GameModeSize.X = 640;
301 fgState.GameModeSize.Y = 480;
302 fgState.GameModeDepth = 16;
303 fgState.GameModeRefresh = 72;
305 fgState.Time.Set = FALSE ;
307 fgState.Timers.First = fgState.Timers.Last = NULL ;
308 fgState.IdleCallback = NULL ;
309 fgState.MenuStateCallback = (FGCBmenuState)NULL ;
310 fgState.MenuStatusCallback = (FGCBmenuStatus)NULL ;
312 #if TARGET_HOST_UNIX_X11
315 * Make sure all X-client data we have created will be destroyed on display closing
317 XSetCloseDownMode( fgDisplay.Display, DestroyAll );
320 * Close the display connection, destroying all windows we have created so far
322 XCloseDisplay( fgDisplay.Display );
328 /* -- INTERFACE FUNCTIONS -------------------------------------------------- */
331 * Perform initialization. This usually happens on the program startup
332 * and restarting after glutMainLoop termination...
334 void FGAPIENTRY glutInit( int* pargc, char** argv )
336 char* displayName = NULL;
337 int i, j, argc = *pargc;
340 * Do not allow multiple initialization of the library
342 if( fgState.Time.Set )
345 * We can't have multiple initialization performed
347 fgError( "illegal glutInit() reinitialization attemp" );
351 * Have the internal freeglut structure initialized now
356 * Remember the function's call time
358 #if TARGET_HOST_UNIX_X11
359 gettimeofday(&fgState.Time.Value, NULL);
360 #elif TARGET_HOST_WIN32
361 fgState.Time.Value = timeGetTime();
363 fgState.Time.Set = TRUE;
366 * Grab the environment variable indicating the X display to use.
367 * This is harmless under Win32, so let's let it stay here...
369 #if TARGET_HOST_WIN32
370 if ( !getenv( "DISPLAY" ) )
371 displayName = strdup( "" );
374 displayName = strdup( getenv( "DISPLAY" ) );
377 * Have the program arguments parsed.
379 for( i=1; i<argc; i++ )
382 * The X display name settings
384 if( strcmp( argv[ i ], "-display" ) == 0 )
387 * Check for possible lack of the next argument
390 fgError( "-display parameter must be followed by display name" );
393 * Release the previous display name (the one from app's environment)
398 * Make a working copy of the name for us to use
400 displayName = strdup( argv[ i ] );
403 * Have both arguments removed
405 argv[ i - 1 ] = NULL;
411 * The geometry settings
413 else if( strcmp( argv[ i ], "-geometry" ) == 0 )
419 * Again, check if there is at least one more argument
422 fgError( "-geometry parameter must be followed by window geometry settings" );
425 * Otherwise scan the geometry settings...
427 result = sscanf ( argv[i], "%dx%d+%d+%d", &x, &y, &w, &h );
430 * Check what we have been supplied with...
441 fgState.Position.Y = fgDisplay.ScreenHeight + y - fgState.Size.Y;
443 fgState.Position.Y = y;
449 fgState.Position.X = fgDisplay.ScreenWidth + x - fgState.Size.X;
451 fgState.Position.X = x;
455 * Have both arguments removed
457 argv[ i - 1 ] = NULL;
463 * The direct/indirect OpenGL contexts settings
465 else if( strcmp( argv[ i ], "-direct" ) == 0)
468 * We try to force direct rendering...
470 if( fgState.TryDirectContext == FALSE )
471 fgError( "parameters ambiguity, -direct and -indirect cannot be both specified" );
473 fgState.ForceDirectContext = TRUE;
477 else if( strcmp( argv[ i ], "-indirect" ) == 0 )
480 * We try to force indirect rendering...
482 if( fgState.ForceDirectContext == TRUE )
483 fgError( "parameters ambiguity, -direct and -indirect cannot be both specified" );
485 fgState.TryDirectContext = FALSE;
491 * The '-iconic' parameter makes all new top-level
492 * windows created in iconified state...
494 else if( strcmp( argv[ i ], "-iconic" ) == 0 )
496 fgState.ForceIconic = TRUE;
502 * The '-gldebug' option activates some OpenGL state debugging features
504 else if( strcmp( argv[ i ], "-gldebug" ) == 0 )
506 fgState.GLDebugSwitch = TRUE;
512 * The '-sync' option activates X protocol synchronization (for debugging purposes)
514 else if( strcmp( argv[ i ], "-sync" ) == 0 )
516 fgState.XSyncSwitch = TRUE;
523 * Have the arguments list compacted now
526 for( i = 1; i < *pargc; i++, j++ )
528 if( argv[ i ] == NULL )
530 while ( argv[j] == NULL ) j++ ; /* Guaranteed to end because there are "*pargc" arguments left */
536 * Have the display created now. As I am too lazy to implement
537 * the program arguments parsing, we will have the DISPLAY
538 * environment variable used for opening the X display:
540 fgInitialize( displayName );
543 * Check for the minus one settings for both position and size...
545 if( fgState.Position.X < 0 || fgState.Position.Y < 0 )
546 fgState.Position.Use = FALSE;
548 if( fgState.Size.X < 0 || fgState.Size.Y < 0 )
549 fgState.Size.Use = FALSE;
552 * Do not forget about releasing the display name string
558 * Sets the default initial window position for new windows
560 void FGAPIENTRY glutInitWindowPosition( int x, int y )
563 * The settings can be disables when both coordinates are negative
565 if( (x >= 0) && (y >= 0) )
568 * We want to specify the initial position of each of the windows
570 fgState.Position.X = x;
571 fgState.Position.Y = y;
572 fgState.Position.Use = TRUE;
577 * The initial position of each of the windows is specified by the wm
579 fgState.Position.X = -1;
580 fgState.Position.Y = -1;
581 fgState.Position.Use = FALSE;
586 * Sets the default initial window size for new windows
588 void FGAPIENTRY glutInitWindowSize( int width, int height )
591 * The settings can be disables when both values are negative
593 if( (width > 0) && (height > 0) )
596 * We want to specify the initial size of each of the windows
598 fgState.Size.X = width;
599 fgState.Size.Y = height;
600 fgState.Size.Use = TRUE;
605 * The initial size of each of the windows is specified by the wm (officially this is an error condition)
609 fgState.Size.Use = FALSE;
614 * Sets the default display mode for all new windows
616 void FGAPIENTRY glutInitDisplayMode( int displayMode )
619 * We will make use of this value when creating a new OpenGL context...
621 fgState.DisplayMode = displayMode;
625 /* -- INIT DISPLAY STRING PARSING ------------------------------------------ */
627 #if 0 /* FIXME: CJP */
629 * There is a discrete number of comparison operators we can encounter:
631 * comparison ::= "=" | "!=" | "<" | ">" | "<=" | ">=" | "~"
633 #define FG_NONE 0x0000
634 #define FG_EQUAL 0x0001
635 #define FG_NOT_EQUAL 0x0002
636 #define FG_LESS 0x0003
637 #define FG_MORE 0x0004
638 #define FG_LESS_OR_EQUAL 0x0005
639 #define FG_MORE_OR_EQUAL 0x0006
640 #define FG_CLOSEST 0x0007
643 * The caller can feed us with a number of capability tokens:
645 * capability ::= "alpha" | "acca" | "acc" | "blue" | "buffer" | "conformant" | "depth" | "double" |
646 * "green" | "index" | "num" | "red" | "rgba" | "rgb" | "luminance" | "stencil" |
647 * "single" | "stereo" | "samples" | "slow" | "win32pdf" | "xvisual" | "xstaticgray" |
648 * "xgrayscale" | "xstaticcolor" | "xpseudocolor" | "xtruecolor" | "xdirectcolor"
650 static gchar* g_Tokens[] =
652 "none", "alpha", "acca", "acc", "blue", "buffer", "conformant", "depth", "double", "green",
653 "index", "num", "red", "rgba", "rgb", "luminance", "stencil", "single", "stereo", "samples",
654 "slow", "win32pdf", "xvisual", "xstaticgray", "xgrayscale", "xstaticcolor", "xpseudocolor",
655 "xtruecolor", "xdirectcolor", NULL
659 * The structure to hold the parsed display string tokens
661 typedef struct tagSFG_Capability SFG_Capability;
662 struct tagSFG_Capability
664 gint capability; /* the capability token enumerator */
665 gint comparison; /* the comparison operator used */
666 gint value; /* the value we're comparing to */
670 * The scanner configuration for the init display string
672 static GScannerConfig fgInitDisplayStringScannerConfig =
674 ( " \t\r\n" ) /* cset_skip_characters */,
679 ) /* cset_identifier_first */,
687 ) /* cset_identifier_nth */,
688 ( "#\n" ) /* cpair_comment_single */,
689 FALSE /* case_sensitive */,
690 TRUE /* skip_comment_multi */,
691 TRUE /* skip_comment_single */,
692 TRUE /* scan_comment_multi */,
693 TRUE /* scan_identifier */,
694 FALSE /* scan_identifier_1char */,
695 FALSE /* scan_identifier_NULL */,
696 TRUE /* scan_symbols */,
697 FALSE /* scan_binary */,
698 TRUE /* scan_octal */,
699 TRUE /* scan_float */,
701 FALSE /* scan_hex_dollar */,
702 TRUE /* scan_string_sq */,
703 TRUE /* scan_string_dq */,
704 TRUE /* numbers_2_int */,
705 FALSE /* int_2_float */,
706 FALSE /* identifier_2_string */,
707 TRUE /* char_2_token */,
708 FALSE /* symbol_2_token */,
709 FALSE /* scope_0_fallback */,
713 * Sets the default display mode for all new windows using a string
715 void FGAPIENTRY glutInitDisplayString( char* displayMode )
718 * display_string ::= (switch)
719 * switch ::= capability [comparison value]
720 * comparison ::= "=" | "!=" | "<" | ">" | "<=" | ">=" | "~"
721 * capability ::= "alpha" | "acca" | "acc" | "blue" | "buffer" | "conformant" |
722 * "depth" | "double" | "green" | "index" | "num" | "red" | "rgba" |
723 * "rgb" | "luminance" | "stencil" | "single" | "stereo" |
724 * "samples" | "slow" | "win32pdf" | "xvisual" | "xstaticgray" |
725 * "xgrayscale" | "xstaticcolor" | "xpseudocolor" |
726 * "xtruecolor" | "xdirectcolor"
727 * value ::= 0..9 [value]
729 * The display string grammar. This should be EBNF, but I couldn't find the definitions so, to
730 * clarify: (expr) means 0 or more times the expression, [expr] means 0 or 1 times expr.
732 * Create a new GLib lexical analyzer to process the display mode string
734 GScanner* scanner = g_scanner_new( &fgInitDisplayStringScannerConfig );
739 * Fail if the display mode string is empty or the scanner failed to initialize
741 freeglut_return_if_fail( (scanner != NULL) && (strlen( displayMode ) > 0) );
744 * Set the scanner's input name (for debugging)
746 scanner->input_name = "glutInitDisplayString";
749 * Start the lexical analysis of the extensions string
751 g_scanner_input_text( scanner, displayMode, strlen( displayMode ) );
754 * While there are any more tokens to be checked...
756 while( !g_scanner_eof( scanner ) )
759 * Actually we're expecting only string tokens
761 GTokenType tokenType = g_scanner_get_next_token( scanner );
764 * We are looking for identifiers
766 if( tokenType == G_TOKEN_IDENTIFIER )
768 gchar* capability = NULL; /* the capability identifier string (always present) */
769 gint capID = 0; /* the capability identifier value (from g_Tokens) */
770 gint comparison = 0; /* the comparison operator value, see definitions */
771 gchar* valueString = NULL; /* if the previous one is present, this is needed */
772 gint value = 0; /* the integer value converted using a strtol call */
773 SFG_Capability* capStruct; /* the capability description structure */
776 * OK. The general rule of thumb that we always should be getting a capability identifier
777 * string (see the grammar description). If it is followed by a comparison identifier, then
778 * there must follow an integer value we're comparing the capability to...
780 * Have the current token analyzed with that in mind...
782 for( i=0; i<(gint) strlen( scanner->value.v_identifier ); i++ )
784 gchar c = scanner->value.v_identifier[ i ];
786 if( (c == '=') || (c == '!') || (c == '<') || (c == '>') || (c == '~') )
791 * Here we go with the length of the capability identifier string.
792 * In the worst of cases, it is as long as the token identifier.
794 capability = g_strndup( scanner->value.v_identifier, i );
797 * OK. Is there a chance for comparison and value identifiers to follow?
798 * Note: checking against i+1 as this handles two cases: single character
799 * comparison operator and first of value's digits, which must always be
800 * there, or the two-character comparison operators.
802 if( (i + 1) < (gint) strlen( scanner->value.v_identifier ) )
805 * Yeah, indeed, it is the i-th character to start the identifier, then.
807 gchar c1 = scanner->value.v_identifier[ i + 0 ];
808 gchar c2 = scanner->value.v_identifier[ i + 1 ];
810 if( (c1 == '=') ) { i += 1; comparison = FG_EQUAL; } else
811 if( (c1 == '!') && (c2 == '=') ) { i += 2; comparison = FG_NOT_EQUAL; } else
812 if( (c1 == '<') && (c2 == '=') ) { i += 2; comparison = FG_LESS_OR_EQUAL; } else
813 if( (c1 == '>') && (c2 == '=') ) { i += 2; comparison = FG_MORE_OR_EQUAL; } else
814 if( (c1 == '<') ) { i += 1; comparison = FG_LESS; } else
815 if( (c1 == '>') ) { i += 1; comparison = FG_MORE; } else
816 if( (c1 == '~') ) { i += 1; comparison = FG_CLOSEST; } else
817 g_warning( "invalid comparison operator in token `%s'", scanner->value.v_identifier );
821 * Grab the value string that must follow the comparison operator...
823 if( comparison != FG_NONE && i < (gint) strlen( scanner->value.v_identifier ) )
824 valueString = g_strdup( scanner->value.v_identifier + i );
827 * If there was a value string, convert it to integer...
829 if( comparison != FG_NONE && strlen( valueString ) > 0 )
830 value = strtol( valueString, NULL, 0 );
833 * Now we need to match the capability string and its ID
835 for( i=0; g_Tokens[ i ]!=NULL; i++ )
837 if( strcmp( capability, g_Tokens[ i ] ) == 0 )
840 * Looks like we've found the one we were looking for
848 * Create a new capability description structure
850 capStruct = g_new0( SFG_Capability, 1 );
853 * Fill in the cap's values, as we have parsed it:
855 capStruct->capability = capID;
856 capStruct->comparison = comparison;
857 capStruct->value = value;
860 * Add the new capabaility to the caps list
862 caps = g_list_append( caps, capStruct );
865 * Clean up the local mess and keep rolling on
867 g_free( valueString );
868 g_free( capability );
873 * Now that we have converted the string into somewhat more machine-friendly
874 * form, proceed with matching the frame buffer configuration...
876 * The caps list could be passed to a function that would try finding the closest
877 * matching pixel format, visual, frame buffer configuration or whatever. It would
878 * be good to convert the glutInitDisplayMode() to use the same method.
881 g_message( "found %i capability preferences", g_list_length( caps ) );
883 g_message( "token `%s': cap: %i, com: %i, val: %i",
884 scanner->value.v_identifier,
885 capStruct->capability,
886 capStruct->comparison,
892 * Free the capabilities we have parsed
894 for( i=0; i<(gint) g_list_length( caps ); i++ )
895 g_free( g_list_nth( caps, i )->data );
898 * Destroy the capabilities list itself
903 * Free the lexical scanner now...
905 g_scanner_destroy( scanner );
909 #define NUM_TOKENS 28
910 static char* Tokens[] =
912 "alpha", "acca", "acc", "blue", "buffer", "conformant", "depth", "double", "green",
913 "index", "num", "red", "rgba", "rgb", "luminance", "stencil", "single", "stereo", "samples",
914 "slow", "win32pdf", "xvisual", "xstaticgray", "xgrayscale", "xstaticcolor", "xpseudocolor",
915 "xtruecolor", "xdirectcolor"
918 static int TokenLengths[] =
920 5, 4, 3, 4, 6, 10, 5, 6, 5,
921 5, 3, 3, 4, 3, 9, 7, 6, 6, 7,
922 4, 8, 7, 11, 10, 12, 12,
926 void FGAPIENTRY glutInitDisplayString( char* displayMode )
928 int glut_state_flag = 0 ;
930 * Unpack a lot of options from a character string. The options are delimited by blanks or tabs.
933 int len = strlen ( displayMode ) ;
934 char *buffer = malloc ( (len+1) * sizeof(char) ) ;
935 memcpy ( buffer, displayMode, len ) ;
938 token = strtok ( buffer, " \t" ) ;
945 for ( i = 0; i < NUM_TOKENS; i++ )
947 if ( strncmp ( token, Tokens[i], TokenLengths[i] ) == 0 ) break ;
952 case 0 : /* "alpha": Alpha color buffer precision in bits */
953 glut_state_flag |= GLUT_ALPHA ; /* Somebody fix this for me! */
956 case 1 : /* "acca": Red, green, blue, and alpha accumulation buffer precision in bits */
959 case 2 : /* "acc": Red, green, and blue accumulation buffer precision in bits with zero bits alpha */
960 glut_state_flag |= GLUT_ACCUM ; /* Somebody fix this for me! */
963 case 3 : /* "blue": Blue color buffer precision in bits */
966 case 4 : /* "buffer": Number of bits in the color index color buffer */
969 case 5 : /* "conformant": Boolean indicating if the frame buffer configuration is conformant or not */
972 case 6 : /* "depth": Number of bits of precsion in the depth buffer */
973 glut_state_flag |= GLUT_DEPTH ; /* Somebody fix this for me! */
976 case 7 : /* "double": Boolean indicating if the color buffer is double buffered */
977 glut_state_flag |= GLUT_DOUBLE ;
980 case 8 : /* "green": Green color buffer precision in bits */
983 case 9 : /* "index": Boolean if the color model is color index or not */
984 glut_state_flag |= GLUT_INDEX ;
987 case 10 : /* "num": A special capability name indicating where the value represents the Nth frame buffer configuration matching the description string */
990 case 11 : /* "red": Red color buffer precision in bits */
993 case 12 : /* "rgba": Number of bits of red, green, blue, and alpha in the RGBA color buffer */
994 glut_state_flag |= GLUT_RGBA ; /* Somebody fix this for me! */
997 case 13 : /* "rgb": Number of bits of red, green, and blue in the RGBA color buffer with zero bits alpha */
998 glut_state_flag |= GLUT_RGB ; /* Somebody fix this for me! */
1001 case 14 : /* "luminance": Number of bits of red in the RGBA and zero bits of green, blue (alpha not specified) of color buffer precision */
1002 glut_state_flag |= GLUT_LUMINANCE ; /* Somebody fix this for me! */
1005 case 15 : /* "stencil": Number of bits in the stencil buffer */
1006 glut_state_flag |= GLUT_STENCIL ; /* Somebody fix this for me! */
1009 case 16 : /* "single": Boolean indicate the color buffer is single buffered */
1010 glut_state_flag |= GLUT_SINGLE ;
1013 case 17 : /* "stereo": Boolean indicating the color buffer supports OpenGL-style stereo */
1014 glut_state_flag |= GLUT_STEREO ;
1017 case 18 : /* "samples": Indicates the number of multisamples to use based on GLX's SGIS_multisample extension (for antialiasing) */
1018 glut_state_flag |= GLUT_MULTISAMPLE ; /* Somebody fix this for me! */
1021 case 19 : /* "slow": Boolean indicating if the frame buffer configuration is slow or not */
1024 case 20 : /* "win32pdf": matches the Win32 Pixel Format Descriptor by number */
1025 #ifdef TARGET_HOST_WIN32
1029 case 21 : /* "xvisual": matches the X visual ID by number */
1030 #ifdef TARGET_HOST_UNIX_X11
1034 case 22 : /* "xstaticgray": boolean indicating if the frame buffer configuration's X visual is of type StaticGray */
1035 #ifdef TARGET_HOST_UNIX_X11
1039 case 23 : /* "xgrayscale": boolean indicating if the frame buffer configuration's X visual is of type GrayScale */
1040 #ifdef TARGET_HOST_UNIX_X11
1044 case 24 : /* "xstaticcolor": boolean indicating if the frame buffer configuration's X visual is of type StaticColor */
1045 #ifdef TARGET_HOST_UNIX_X11
1049 case 25 : /* "xpseudocolor": boolean indicating if the frame buffer configuration's X visual is of type PseudoColor */
1050 #ifdef TARGET_HOST_UNIX_X11
1054 case 26 : /* "xtruecolor": boolean indicating if the frame buffer configuration's X visual is of type TrueColor */
1055 #ifdef TARGET_HOST_UNIX_X11
1059 case 27 : /* "xdirectcolor": boolean indicating if the frame buffer configuration's X visual is of type DirectColor */
1060 #ifdef TARGET_HOST_UNIX_X11
1064 case 28 : /* Unrecognized */
1065 printf ( "WARNING - Display string token not recognized: %s\n", token ) ;
1069 token = strtok ( NULL, " \t" ) ;
1075 * We will make use of this value when creating a new OpenGL context...
1077 fgState.DisplayMode = glut_state_flag;
1080 /*** END OF FILE ***/