diff options
Diffstat (limited to 'src/glut/glx/glut_event.c')
| -rw-r--r-- | src/glut/glx/glut_event.c | 1382 |
1 files changed, 1382 insertions, 0 deletions
diff --git a/src/glut/glx/glut_event.c b/src/glut/glx/glut_event.c new file mode 100644 index 00000000000..4e67da674ed --- /dev/null +++ b/src/glut/glx/glut_event.c @@ -0,0 +1,1382 @@ + +/* Copyright (c) Mark J. Kilgard, 1994, 1995, 1996, 1997, 1998. */ + +/* This program is freely distributable without licensing fees + and is provided without guarantee or warrantee expressed or + implied. This program is -not- in the public domain. */ + +#ifdef __VMS +#include <GL/vms_x_fix.h> +#endif + +#include <stdlib.h> +#include <stdio.h> +#include <errno.h> +#include <assert.h> +#include <string.h> /* Some FD_ZERO macros use memset without + prototyping memset. */ + +/* Much of the following #ifdef logic to include the proper + prototypes for the select system call is based on logic + from the X11R6.3 version of <X11/Xpoll.h>. */ + +#if !defined(_WIN32) +# ifdef __sgi +# include <bstring.h> /* prototype for bzero used by FD_ZERO */ +# endif +# if (defined(SVR4) || defined(CRAY) || defined(AIXV3)) && !defined(FD_SETSIZE) +# include <sys/select.h> /* select system call interface */ +# ifdef luna +# include <sysent.h> +# endif +# endif + /* AIX 4.2 fubar-ed <sys/select.h>, so go to heroic measures to get it */ +# if defined(AIXV4) && !defined(NFDBITS) +# include <sys/select.h> +# endif +#endif /* !_WIN32 */ + +#include <sys/types.h> + +#if !defined(_WIN32) +# if defined(__vms) && ( __VMS_VER < 70000000 ) +# include <sys/time.h> +# else +# ifndef __vms +# include <sys/time.h> +# endif +# endif +# include <unistd.h> +# include <X11/Xlib.h> +# include <X11/keysym.h> +#else +# ifdef __CYGWIN32__ +# include <sys/time.h> +# else +# include <sys/timeb.h> +# endif +# ifdef __hpux + /* XXX Bert Gijsbers <[email protected]> reports that HP-UX + needs different keysyms for the End, Insert, and Delete keys + to work on an HP 715. It would be better if HP generated + standard keysyms for standard keys. */ +# include <X11/HPkeysym.h> +# endif +#endif /* !_WIN32 */ + +#include "glutint.h" + +#if defined(__vms) && ( __VMS_VER < 70000000 ) +#include <ssdef.h> +#include <psldef.h> +extern int SYS$CLREF(int efn); +extern int SYS$SETIMR(unsigned int efn, struct timeval6 *timeout, void *ast, + unsigned int request_id, unsigned int flags); +extern int SYS$WFLOR(unsigned int efn, unsigned int mask); +extern int SYS$CANTIM(unsigned int request_id, unsigned int mode); +#endif /* __vms, VMs 6.2 or earlier */ + +static GLUTtimer *freeTimerList = NULL; + +GLUTidleCB __glutIdleFunc = NULL; +GLUTtimer *__glutTimerList = NULL; +#ifdef SUPPORT_FORTRAN +GLUTtimer *__glutNewTimer; +#endif +GLUTwindow *__glutWindowWorkList = NULL; +GLUTmenu *__glutMappedMenu; +GLUTmenu *__glutCurrentMenu = NULL; + +void (*__glutUpdateInputDeviceMaskFunc) (GLUTwindow *); +#if !defined(_WIN32) +void (*__glutMenuItemEnterOrLeave)(GLUTmenuItem * item, int num, int type) = NULL; +void (*__glutFinishMenu)(Window win, int x, int y); +void (*__glutPaintMenu)(GLUTmenu * menu); +void (*__glutStartMenu)(GLUTmenu * menu, GLUTwindow * window, int x, int y, int x_win, int y_win); +GLUTmenu * (*__glutGetMenuByNum)(int menunum); +GLUTmenuItem * (*__glutGetMenuItem)(GLUTmenu * menu, Window win, int *which); +GLUTmenu * (*__glutGetMenu)(Window win); +#endif + +Atom __glutMotifHints = None; +/* Modifier mask of ~0 implies not in core input callback. */ +unsigned int __glutModifierMask = (unsigned int) ~0; +int __glutWindowDamaged = 0; + +void GLUTAPIENTRY +glutIdleFunc(GLUTidleCB idleFunc) +{ + __glutIdleFunc = idleFunc; +} + +void GLUTAPIENTRY +glutTimerFunc(unsigned int interval, GLUTtimerCB timerFunc, int value) +{ + GLUTtimer *timer, *other; + GLUTtimer **prevptr; +#ifdef OLD_VMS + struct timeval6 now; +#else + struct timeval now; +#endif + + if (!timerFunc) + return; + + if (freeTimerList) { + timer = freeTimerList; + freeTimerList = timer->next; + } else { + timer = (GLUTtimer *) malloc(sizeof(GLUTtimer)); + if (!timer) + __glutFatalError("out of memory."); + } + + timer->func = timerFunc; +#if defined(__vms) && ( __VMS_VER < 70000000 ) + /* VMS time is expressed in units of 100 ns */ + timer->timeout.val = interval * TICKS_PER_MILLISECOND; +#else + timer->timeout.tv_sec = (int) interval / 1000; + timer->timeout.tv_usec = (int) (interval % 1000) * 1000; +#endif + timer->value = value; + timer->next = NULL; + GETTIMEOFDAY(&now); + ADD_TIME(timer->timeout, timer->timeout, now); + prevptr = &__glutTimerList; + other = *prevptr; + while (other && IS_AFTER(other->timeout, timer->timeout)) { + prevptr = &other->next; + other = *prevptr; + } + timer->next = other; +#ifdef SUPPORT_FORTRAN + __glutNewTimer = timer; /* for Fortran binding! */ +#endif + *prevptr = timer; +} + +void +handleTimeouts(void) +{ +#ifdef OLD_VMS + struct timeval6 now; +#else + struct timeval now; +#endif + GLUTtimer *timer; + + /* Assumption is that __glutTimerList is already determined + to be non-NULL. */ + GETTIMEOFDAY(&now); + while (IS_AT_OR_AFTER(__glutTimerList->timeout, now)) { + timer = __glutTimerList; + __glutTimerList = timer->next; + timer->func(timer->value); + timer->next = freeTimerList; + freeTimerList = timer; + if (!__glutTimerList) + break; + } +} + +void +__glutPutOnWorkList(GLUTwindow * window, int workMask) +{ + if (window->workMask) { + /* Already on list; just OR in new workMask. */ + window->workMask |= workMask; + } else { + /* Update work mask and add to window work list. */ + window->workMask = workMask; + /* Assert that if the window does not have a + workMask already, the window should definitely + not be the head of the work list. */ + assert(window != __glutWindowWorkList); + window->prevWorkWin = __glutWindowWorkList; + __glutWindowWorkList = window; + } +} + +void +__glutPostRedisplay(GLUTwindow * window, int layerMask) +{ + int shown = (layerMask & (GLUT_REDISPLAY_WORK | GLUT_REPAIR_WORK)) ? + window->shownState : window->overlay->shownState; + + /* Post a redisplay if the window is visible (or the + visibility of the window is unknown, ie. window->visState + == -1) _and_ the layer is known to be shown. */ + if (window->visState != GLUT_HIDDEN + && window->visState != GLUT_FULLY_COVERED && shown) { + __glutPutOnWorkList(window, layerMask); + } +} + +/* CENTRY */ +void GLUTAPIENTRY +glutPostRedisplay(void) +{ + __glutPostRedisplay(__glutCurrentWindow, GLUT_REDISPLAY_WORK); +} + +/* The advantage of this routine is that it saves the cost of a + glutSetWindow call (entailing an expensive OpenGL context switch), + particularly useful when multiple windows need redisplays posted at + the same times. See also glutPostWindowOverlayRedisplay. */ +void GLUTAPIENTRY +glutPostWindowRedisplay(int win) +{ + __glutPostRedisplay(__glutWindowList[win - 1], GLUT_REDISPLAY_WORK); +} + +/* ENDCENTRY */ +static GLUTeventParser *eventParserList = NULL; + +/* __glutRegisterEventParser allows another module to register + to intercept X events types not otherwise acted on by the + GLUT processEventsAndTimeouts routine. The X Input + extension support code uses an event parser for handling X + Input extension events. */ + +void +__glutRegisterEventParser(GLUTeventParser * parser) +{ + parser->next = eventParserList; + eventParserList = parser; +} + +static void +markWindowHidden(GLUTwindow * window) +{ + if (GLUT_HIDDEN != window->visState) { + GLUTwindow *child; + + if (window->windowStatus) { + window->visState = GLUT_HIDDEN; + __glutSetWindow(window); + window->windowStatus(GLUT_HIDDEN); + } + /* An unmap is only reported on a single window; its + descendents need to know they are no longer visible. */ + child = window->children; + while (child) { + markWindowHidden(child); + child = child->siblings; + } + } +} + +#if !defined(_WIN32) + +static void +purgeStaleWindow(Window win) +{ + GLUTstale **pEntry = &__glutStaleWindowList; + GLUTstale *entry = __glutStaleWindowList; + + /* Tranverse singly-linked stale window list look for the + window ID. */ + while (entry) { + if (entry->win == win) { + /* Found it; delete it. */ + *pEntry = entry->next; + free(entry); + return; + } else { + pEntry = &entry->next; + entry = *pEntry; + } + } +} + +/* Unlike XNextEvent, if a signal arrives, + interruptibleXNextEvent will return (with a zero return + value). This helps GLUT drop out of XNextEvent if a signal + is delivered. The intent is so that a GLUT program can call + glutIdleFunc in a signal handler to register an idle func + and then immediately get dropped into the idle func (after + returning from the signal handler). The idea is to make + GLUT's main loop reliably interruptible by signals. */ +static int +interruptibleXNextEvent(Display * dpy, XEvent * event) +{ + fd_set fds; + int rc; + + /* Flush X protocol since XPending does not do this + implicitly. */ + XFlush(__glutDisplay); + for (;;) { + if (XPending(__glutDisplay)) { + XNextEvent(dpy, event); + return 1; + } +#ifndef VMS + /* the combination ConectionNumber-select is buggy on VMS. Sometimes it + * fails. This part of the code hangs the program on VMS7.2. But even + * without it the program seems to run correctly. + * Note that this is a bug in the VMS/DECWindows run-time-libraries. + * Compaq engeneering does not want or is not able to make a fix. + * (last sentence is a quotation from Compaq when I reported the + * problem January 2000) */ + FD_ZERO(&fds); + FD_SET(__glutConnectionFD, &fds); + rc = select(__glutConnectionFD + 1, &fds, NULL, NULL, NULL); + if (rc < 0) { + if (errno == EINTR) { + return 0; + } else { + __glutFatalError("select error."); + } + } +#endif + } +} + +#endif + +static void +processEventsAndTimeouts(void) +{ + do { +#if defined(_WIN32) + MSG event; + + if(!GetMessage(&event, NULL, 0, 0)) /* bail if no more messages */ + exit(0); + TranslateMessage(&event); /* translate virtual-key messages */ + DispatchMessage(&event); /* call the window proc */ + /* see win32_event.c for event (message) processing procedures */ +#else + static int mappedMenuButton; + GLUTeventParser *parser; + XEvent event, ahead; + GLUTwindow *window; + GLUTkeyboardCB keyboard; + GLUTspecialCB special; + int gotEvent, width, height; + + gotEvent = interruptibleXNextEvent(__glutDisplay, &event); + if (gotEvent) { + switch (event.type) { + case MappingNotify: + XRefreshKeyboardMapping((XMappingEvent *) & event); + break; + case ConfigureNotify: + window = __glutGetWindow(event.xconfigure.window); + if (window) { + if (window->win != event.xconfigure.window) { + /* Ignore ConfigureNotify sent to the overlay + planes. GLUT could get here because overlays + select for StructureNotify events to receive + DestroyNotify. */ + break; + } + width = event.xconfigure.width; + height = event.xconfigure.height; + if (width != window->width || height != window->height) { + if (window->overlay) { + XResizeWindow(__glutDisplay, window->overlay->win, width, height); + } + window->width = width; + window->height = height; + __glutSetWindow(window); + /* Do not execute OpenGL out of sequence with + respect to the XResizeWindow request! */ + glXWaitX(); + window->reshape(width, height); + window->forceReshape = False; + /* A reshape should be considered like posting a + repair; this is necessary for the "Mesa + glXSwapBuffers to repair damage" hack to operate + correctly. Without it, there's not an initial + back buffer render from which to blit from when + damage happens to the window. */ + __glutPostRedisplay(window, GLUT_REPAIR_WORK); + } + } + break; + case Expose: + /* compress expose events */ + while (XEventsQueued(__glutDisplay, QueuedAfterReading) + > 0) { + XPeekEvent(__glutDisplay, &ahead); + if (ahead.type != Expose || + ahead.xexpose.window != event.xexpose.window) { + break; + } + XNextEvent(__glutDisplay, &event); + } + if (event.xexpose.count == 0) { + GLUTmenu *menu; + + if (__glutMappedMenu && + (menu = __glutGetMenu(event.xexpose.window))) { + __glutPaintMenu(menu); + } else { + window = __glutGetWindow(event.xexpose.window); + if (window) { + if (window->win == event.xexpose.window) { + __glutPostRedisplay(window, GLUT_REPAIR_WORK); + } else if (window->overlay && window->overlay->win == event.xexpose.window) { + __glutPostRedisplay(window, GLUT_OVERLAY_REPAIR_WORK); + } + } + } + } else { + /* there are more exposes to read; wait to redisplay */ + } + break; + case ButtonPress: + case ButtonRelease: + if (__glutMappedMenu && event.type == ButtonRelease + && mappedMenuButton == event.xbutton.button) { + /* Menu is currently popped up and its button is + released. */ + __glutFinishMenu(event.xbutton.window, event.xbutton.x, event.xbutton.y); + } else { + window = __glutGetWindow(event.xbutton.window); + /* added button check for mice with > 3 buttons */ + if (window) { + GLUTmenu *menu; + int menuNum; + + if (event.xbutton.button <= GLUT_MAX_MENUS) + menuNum = window->menu[event.xbutton.button - 1]; + else + menuNum = 0; + + /* Make sure that __glutGetMenuByNum is only called if there + really is a menu present. */ + if ((menuNum > 0) && (menu = __glutGetMenuByNum(menuNum))) { + if (event.type == ButtonPress && !__glutMappedMenu) { + __glutStartMenu(menu, window, + event.xbutton.x_root, event.xbutton.y_root, + event.xbutton.x, event.xbutton.y); + mappedMenuButton = event.xbutton.button; + } else { + /* Ignore a release of a button with a menu + attatched to it when no menu is popped up, + or ignore a press when another menu is + already popped up. */ + } + } else if (window->mouse) { + __glutSetWindow(window); + __glutModifierMask = event.xbutton.state; + window->mouse(event.xbutton.button - 1, + event.type == ButtonRelease ? + GLUT_UP : GLUT_DOWN, + event.xbutton.x, event.xbutton.y); + __glutModifierMask = ~0; + } else { + /* Stray mouse events. Ignore. */ + } + } else { + /* Window might have been destroyed and all the + events for the window may not yet be received. */ + } + } + break; + case MotionNotify: + if (!__glutMappedMenu) { + window = __glutGetWindow(event.xmotion.window); + if (window) { + /* If motion function registered _and_ buttons held + * down, call motion function... */ + if (window->motion && event.xmotion.state & + (Button1Mask | Button2Mask | Button3Mask)) { + __glutSetWindow(window); + window->motion(event.xmotion.x, event.xmotion.y); + } + /* If passive motion function registered _and_ + buttons not held down, call passive motion + function... */ + else if (window->passive && + ((event.xmotion.state & + (Button1Mask | Button2Mask | Button3Mask)) == + 0)) { + __glutSetWindow(window); + window->passive(event.xmotion.x, + event.xmotion.y); + } + } + } else { + /* Motion events are thrown away when a pop up menu + is active. */ + } + break; + case KeyPress: + case KeyRelease: + window = __glutGetWindow(event.xkey.window); + if (!window) { + break; + } + if (event.type == KeyPress) { + keyboard = window->keyboard; + } else { + + /* If we are ignoring auto repeated keys for this window, + check if the next event in the X event queue is a KeyPress + for the exact same key (and at the exact same time) as the + key being released. The X11 protocol will send auto + repeated keys as such KeyRelease/KeyPress pairs. */ + + if (window->ignoreKeyRepeat) { + if (XEventsQueued(__glutDisplay, QueuedAfterReading)) { + XPeekEvent(__glutDisplay, &ahead); + if (ahead.type == KeyPress + && ahead.xkey.window == event.xkey.window + && ahead.xkey.keycode == event.xkey.keycode + && ahead.xkey.time == event.xkey.time) { + /* Pop off the repeated KeyPress and ignore + the auto repeated KeyRelease/KeyPress pair. */ + XNextEvent(__glutDisplay, &event); + break; + } + } + } + keyboard = window->keyboardUp; + } + if (keyboard) { + char tmp[1]; + int rc; + + rc = XLookupString(&event.xkey, tmp, sizeof(tmp), + NULL, NULL); + if (rc) { + __glutSetWindow(window); + __glutModifierMask = event.xkey.state; + keyboard(tmp[0], + event.xkey.x, event.xkey.y); + __glutModifierMask = ~0; + break; + } + } + if (event.type == KeyPress) { + special = window->special; + } else { + special = window->specialUp; + } + if (special) { + KeySym ks; + int key; + +/* Introduced in X11R6: (Partial list of) Keypad Functions. Define + in place in case compiling against an older pre-X11R6 + X11/keysymdef.h file. */ +#ifndef XK_KP_Home +#define XK_KP_Home 0xFF95 +#endif +#ifndef XK_KP_Left +#define XK_KP_Left 0xFF96 +#endif +#ifndef XK_KP_Up +#define XK_KP_Up 0xFF97 +#endif +#ifndef XK_KP_Right +#define XK_KP_Right 0xFF98 +#endif +#ifndef XK_KP_Down +#define XK_KP_Down 0xFF99 +#endif +#ifndef XK_KP_Prior +#define XK_KP_Prior 0xFF9A +#endif +#ifndef XK_KP_Next +#define XK_KP_Next 0xFF9B +#endif +#ifndef XK_KP_End +#define XK_KP_End 0xFF9C +#endif +#ifndef XK_KP_Insert +#define XK_KP_Insert 0xFF9E +#endif +#ifndef XK_KP_Delete +#define XK_KP_Delete 0xFF9F +#endif + + ks = XLookupKeysym((XKeyEvent *) & event, 0); + /* XXX Verbose, but makes no assumptions about keysym + layout. */ + switch (ks) { +/* *INDENT-OFF* */ + /* function keys */ + case XK_F1: key = GLUT_KEY_F1; break; + case XK_F2: key = GLUT_KEY_F2; break; + case XK_F3: key = GLUT_KEY_F3; break; + case XK_F4: key = GLUT_KEY_F4; break; + case XK_F5: key = GLUT_KEY_F5; break; + case XK_F6: key = GLUT_KEY_F6; break; + case XK_F7: key = GLUT_KEY_F7; break; + case XK_F8: key = GLUT_KEY_F8; break; + case XK_F9: key = GLUT_KEY_F9; break; + case XK_F10: key = GLUT_KEY_F10; break; + case XK_F11: key = GLUT_KEY_F11; break; + case XK_F12: key = GLUT_KEY_F12; break; + /* directional keys */ + case XK_KP_Left: + case XK_Left: key = GLUT_KEY_LEFT; break; + case XK_KP_Up: /* Introduced in X11R6. */ + case XK_Up: key = GLUT_KEY_UP; break; + case XK_KP_Right: /* Introduced in X11R6. */ + case XK_Right: key = GLUT_KEY_RIGHT; break; + case XK_KP_Down: /* Introduced in X11R6. */ + case XK_Down: key = GLUT_KEY_DOWN; break; +/* *INDENT-ON* */ + + case XK_KP_Prior: /* Introduced in X11R6. */ + case XK_Prior: + /* XK_Prior same as X11R6's XK_Page_Up */ + key = GLUT_KEY_PAGE_UP; + break; + case XK_KP_Next: /* Introduced in X11R6. */ + case XK_Next: + /* XK_Next same as X11R6's XK_Page_Down */ + key = GLUT_KEY_PAGE_DOWN; + break; + case XK_KP_Home: /* Introduced in X11R6. */ + case XK_Home: + key = GLUT_KEY_HOME; + break; +#ifdef __hpux + case XK_Select: +#endif + case XK_KP_End: /* Introduced in X11R6. */ + case XK_End: + key = GLUT_KEY_END; + break; +#ifdef __hpux + case XK_InsertChar: +#endif + case XK_KP_Insert: /* Introduced in X11R6. */ + case XK_Insert: + key = GLUT_KEY_INSERT; + break; +#ifdef __hpux + case XK_DeleteChar: +#endif + case XK_KP_Delete: /* Introduced in X11R6. */ + /* The Delete character is really an ASCII key. */ + __glutSetWindow(window); + keyboard(127, /* ASCII Delete character. */ + event.xkey.x, event.xkey.y); + goto skip; + default: + goto skip; + } + __glutSetWindow(window); + __glutModifierMask = event.xkey.state; + special(key, event.xkey.x, event.xkey.y); + __glutModifierMask = ~0; + skip:; + } + break; + case EnterNotify: + case LeaveNotify: + if (event.xcrossing.mode != NotifyNormal || + event.xcrossing.detail == NotifyNonlinearVirtual || + event.xcrossing.detail == NotifyVirtual) { + + /* Careful to ignore Enter/LeaveNotify events that + come from the pop-up menu pointer grab and ungrab. + Also, ignore "virtual" Enter/LeaveNotify events + since they represent the pointer passing through + the window hierarchy without actually entering or + leaving the actual real estate of a window. */ + + break; + } + if (__glutMappedMenu) { + GLUTmenuItem *item; + int num; + + item = __glutGetMenuItem(__glutMappedMenu, + event.xcrossing.window, &num); + if (item) { + __glutMenuItemEnterOrLeave(item, num, event.type); + break; + } + } + window = __glutGetWindow(event.xcrossing.window); + if (window) { + if (window->entry) { + if (event.type == EnterNotify) { + + /* With overlays established, X can report two + enter events for both the overlay and normal + plane window. Do not generate a second enter + callback if we reported one without an + intervening leave. */ + + if (window->entryState != EnterNotify) { + int num = window->num; + Window xid = window->win; + + window->entryState = EnterNotify; + __glutSetWindow(window); + window->entry(GLUT_ENTERED); + + if (__glutMappedMenu) { + + /* Do not generate any passive motion events + when menus are in use. */ + + } else { + + /* An EnterNotify event can result in a + "compound" callback if a passive motion + callback is also registered. In this case, + be a little paranoid about the possibility + the window could have been destroyed in the + entry callback. */ + + window = __glutWindowList[num]; + if (window && window->passive && window->win == xid) { + __glutSetWindow(window); + window->passive(event.xcrossing.x, event.xcrossing.y); + } + } + } + } else { + if (window->entryState != LeaveNotify) { + + /* When an overlay is established for a window + already mapped and with the pointer in it, + the X server will generate a leave/enter + event pair as the pointer leaves (without + moving) from the normal plane X window to + the newly mapped overlay X window (or vice + versa). This enter/leave pair should not be + reported to the GLUT program since the pair + is a consequence of creating (or destroying) + the overlay, not an actual leave from the + GLUT window. */ + + if (XEventsQueued(__glutDisplay, QueuedAfterReading)) { + XPeekEvent(__glutDisplay, &ahead); + if (ahead.type == EnterNotify && + __glutGetWindow(ahead.xcrossing.window) == window) { + XNextEvent(__glutDisplay, &event); + break; + } + } + window->entryState = LeaveNotify; + __glutSetWindow(window); + window->entry(GLUT_LEFT); + } + } + } else if (window->passive) { + __glutSetWindow(window); + window->passive(event.xcrossing.x, event.xcrossing.y); + } + } + break; + case UnmapNotify: + /* MapNotify events are not needed to maintain + visibility state since VisibilityNotify events will + be delivered when a window becomes visible from + mapping. However, VisibilityNotify events are not + delivered when a window is unmapped (for the window + or its children). */ + window = __glutGetWindow(event.xunmap.window); + if (window) { + if (window->win != event.xconfigure.window) { + /* Ignore UnmapNotify sent to the overlay planes. + GLUT could get here because overlays select for + StructureNotify events to receive DestroyNotify. + */ + break; + } + markWindowHidden(window); + } + break; + case VisibilityNotify: + window = __glutGetWindow(event.xvisibility.window); + if (window) { + /* VisibilityUnobscured+1 = GLUT_FULLY_RETAINED, + VisibilityPartiallyObscured+1 = + GLUT_PARTIALLY_RETAINED, VisibilityFullyObscured+1 + = GLUT_FULLY_COVERED. */ + int visState = event.xvisibility.state + 1; + + if (visState != window->visState) { + if (window->windowStatus) { + window->visState = visState; + __glutSetWindow(window); + window->windowStatus(visState); + } + } + } + break; + case ClientMessage: + if (event.xclient.data.l[0] == __glutWMDeleteWindow) + exit(0); + break; + case DestroyNotify: + purgeStaleWindow(event.xdestroywindow.window); + break; + case CirculateNotify: + case CreateNotify: + case GravityNotify: + case ReparentNotify: + /* Uninteresting to GLUT (but possible for GLUT to + receive). */ + break; + default: + /* Pass events not directly handled by the GLUT main + event loop to any event parsers that have been + registered. In this way, X Input extension events + are passed to the correct handler without forcing + all GLUT programs to support X Input event handling. + */ + parser = eventParserList; + while (parser) { + if (parser->func(&event)) + break; + parser = parser->next; + } + break; + } + } +#endif /* _WIN32 */ + if (__glutTimerList) { + handleTimeouts(); + } + } + while (XPending(__glutDisplay)); +} + +static void +waitForSomething(void) +{ +#if defined(__vms) && ( __VMS_VER < 70000000 ) + static struct timeval6 zerotime = + {0}; + unsigned int timer_efn; +#define timer_id 'glut' /* random :-) number */ + unsigned int wait_mask; +#else + static struct timeval zerotime = + {0, 0}; +#if !defined(_WIN32) + fd_set fds; +#endif +#endif +#ifdef OLD_VMS + struct timeval6 now, timeout, waittime; +#else + struct timeval now, timeout, waittime; +#endif +#if !defined(_WIN32) + int rc; +#endif + + /* Flush X protocol since XPending does not do this + implicitly. */ + XFlush(__glutDisplay); + if (XPending(__glutDisplay)) { + /* It is possible (but quite rare) that XFlush may have + needed to wait for a writable X connection file + descriptor, and in the process, may have had to read off + X protocol from the file descriptor. If XPending is true, + this case occured and we should avoid waiting in select + since X protocol buffered within Xlib is due to be + processed and potentially no more X protocol is on the + file descriptor, so we would risk waiting improperly in + select. */ + goto immediatelyHandleXinput; + } +#if defined(__vms) && ( __VMS_VER < 70000000 ) + timeout = __glutTimerList->timeout; + GETTIMEOFDAY(&now); + wait_mask = 1 << (__glutConnectionFD & 31); + if (IS_AFTER(now, timeout)) { + /* We need an event flag for the timer. */ + /* XXX The `right' way to do this is to use LIB$GET_EF, but + since it needs to be in the same cluster as the EFN for + the display, we will have hack it. */ + timer_efn = __glutConnectionFD - 1; + if ((timer_efn / 32) != (__glutConnectionFD / 32)) { + timer_efn = __glutConnectionFD + 1; + } + rc = SYS$CLREF(timer_efn); + rc = SYS$SETIMR(timer_efn, &timeout, NULL, timer_id, 0); + wait_mask |= 1 << (timer_efn & 31); + } else { + timer_efn = 0; + } + rc = SYS$WFLOR(__glutConnectionFD, wait_mask); + if (timer_efn != 0 && SYS$CLREF(timer_efn) == SS$_WASCLR) { + rc = SYS$CANTIM(timer_id, PSL$C_USER); + } + /* XXX There does not seem to be checking of "rc" in the code + above. Can any of the SYS$ routines above fail? */ +#else /* not vms6.2 or lower */ +#if !defined(_WIN32) + FD_ZERO(&fds); + FD_SET(__glutConnectionFD, &fds); +#endif + timeout = __glutTimerList->timeout; + GETTIMEOFDAY(&now); + if (IS_AFTER(now, timeout)) { + TIMEDELTA(waittime, timeout, now); + } else { + waittime = zerotime; + } +#if !defined(_WIN32) + rc = select(__glutConnectionFD + 1, &fds, + NULL, NULL, &waittime); + if (rc < 0 && errno != EINTR) + __glutFatalError("select error."); +#else + + MsgWaitForMultipleObjects(0, NULL, FALSE, + waittime.tv_sec*1000 + waittime.tv_usec/1000, QS_ALLINPUT); + +#endif +#endif /* not vms6.2 or lower */ + /* Without considering the cause of select unblocking, check + for pending X events and handle any timeouts (by calling + processEventsAndTimeouts). We always look for X events + even if select returned with 0 (indicating a timeout); + otherwise we risk starving X event processing by continous + timeouts. */ + if (XPending(__glutDisplay)) { + immediatelyHandleXinput: + processEventsAndTimeouts(); + } else { + if (__glutTimerList) + handleTimeouts(); + } +} + +static void +idleWait(void) +{ + if (XPending(__glutDisplay)) { + processEventsAndTimeouts(); + } else { + if (__glutTimerList) { + handleTimeouts(); + } + } + /* Make sure idle func still exists! */ + if (__glutIdleFunc) { + __glutIdleFunc(); + } +} + +static GLUTwindow **beforeEnd; + +static GLUTwindow * +processWindowWorkList(GLUTwindow * window) +{ + int workMask; + + if (window->prevWorkWin) { + window->prevWorkWin = processWindowWorkList(window->prevWorkWin); + } else { + beforeEnd = &window->prevWorkWin; + } + + /* Capture work mask for work that needs to be done to this + window, then clear the window's work mask (excepting the + dummy work bit, see below). Then, process the captured + work mask. This allows callbacks in the processing the + captured work mask to set the window's work mask for + subsequent processing. */ + + workMask = window->workMask; + assert((workMask & GLUT_DUMMY_WORK) == 0); + + /* Set the dummy work bit, clearing all other bits, to + indicate that the window is currently on the window work + list _and_ that the window's work mask is currently being + processed. This convinces __glutPutOnWorkList that this + window is on the work list still. */ + window->workMask = GLUT_DUMMY_WORK; + + /* Optimization: most of the time, the work to do is a + redisplay and not these other types of work. Check for + the following cases as a group to before checking each one + individually one by one. This saves about 25 MIPS + instructions in the common redisplay only case. */ + if (workMask & (GLUT_EVENT_MASK_WORK | GLUT_DEVICE_MASK_WORK | + GLUT_CONFIGURE_WORK | GLUT_COLORMAP_WORK | GLUT_MAP_WORK)) { +#if !defined(_WIN32) + /* Be sure to set event mask BEFORE map window is done. */ + if (workMask & GLUT_EVENT_MASK_WORK) { + long eventMask; + + /* Make sure children are not propogating events this + window is selecting for. Be sure to do this before + enabling events on the children's parent. */ + if (window->children) { + GLUTwindow *child = window->children; + unsigned long attribMask = CWDontPropagate; + XSetWindowAttributes wa; + + wa.do_not_propagate_mask = window->eventMask & GLUT_DONT_PROPAGATE_FILTER_MASK; + if (window->eventMask & GLUT_HACK_STOP_PROPAGATE_MASK) { + wa.event_mask = child->eventMask | (window->eventMask & GLUT_HACK_STOP_PROPAGATE_MASK); + attribMask |= CWEventMask; + } + do { + XChangeWindowAttributes(__glutDisplay, child->win, + attribMask, &wa); + child = child->siblings; + } while (child); + } + eventMask = window->eventMask; + if (window->parent && window->parent->eventMask & GLUT_HACK_STOP_PROPAGATE_MASK) + eventMask |= (window->parent->eventMask & GLUT_HACK_STOP_PROPAGATE_MASK); + XSelectInput(__glutDisplay, window->win, eventMask); + if (window->overlay) + XSelectInput(__glutDisplay, window->overlay->win, + window->eventMask & GLUT_OVERLAY_EVENT_FILTER_MASK); + } +#endif /* !_WIN32 */ + /* Be sure to set device mask BEFORE map window is done. */ + if (workMask & GLUT_DEVICE_MASK_WORK) { + __glutUpdateInputDeviceMaskFunc(window); + } + /* Be sure to configure window BEFORE map window is done. */ + if (workMask & GLUT_CONFIGURE_WORK) { +#if defined(_WIN32) + RECT changes; + POINT point; + UINT flags = SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOOWNERZORDER + | SWP_NOSENDCHANGING | SWP_NOSIZE | SWP_NOZORDER; + + GetClientRect(window->win, &changes); + + /* If this window is a toplevel window, translate the 0,0 client + coordinate into a screen coordinate for proper placement. */ + if (!window->parent) { + point.x = 0; + point.y = 0; + ClientToScreen(window->win, &point); + changes.left = point.x; + changes.top = point.y; + } + if (window->desiredConfMask & (CWX | CWY)) { + changes.left = window->desiredX; + changes.top = window->desiredY; + flags &= ~SWP_NOMOVE; + } + if (window->desiredConfMask & (CWWidth | CWHeight)) { + changes.right = changes.left + window->desiredWidth; + changes.bottom = changes.top + window->desiredHeight; + flags &= ~SWP_NOSIZE; + /* XXX If overlay exists, resize the overlay here, ie. + if (window->overlay) ... */ + } + if (window->desiredConfMask & CWStackMode) { + flags &= ~SWP_NOZORDER; + /* XXX Overlay support might require something special here. */ + } + + /* Adjust the window rectangle because Win32 thinks that the x, y, + width & height are the WHOLE window (including decorations), + whereas GLUT treats the x, y, width & height as only the CLIENT + area of the window. Only do this to top level windows + that are not in game mode (since game mode windows do + not have any decorations). */ + if (!window->parent && window != __glutGameModeWindow) { + AdjustWindowRect(&changes, + WS_OVERLAPPEDWINDOW | WS_CLIPSIBLINGS | WS_CLIPCHILDREN, + FALSE); + } + + /* Do the repositioning, moving, and push/pop. */ + SetWindowPos(window->win, + window->desiredStack == Above ? HWND_TOP : HWND_NOTOPMOST, + changes.left, changes.top, + changes.right - changes.left, changes.bottom - changes.top, + flags); + + /* Zero out the mask. */ + window->desiredConfMask = 0; + + /* This hack causes the window to go back to the right position + when it is taken out of fullscreen mode. */ + if (workMask & GLUT_FULL_SCREEN_WORK) { + window->desiredConfMask |= CWX | CWY; + window->desiredX = point.x; + window->desiredY = point.y; + } +#else /* !_WIN32 */ + XWindowChanges changes; + + changes.x = window->desiredX; + changes.y = window->desiredY; + if (window->desiredConfMask & (CWWidth | CWHeight)) { + changes.width = window->desiredWidth; + changes.height = window->desiredHeight; + if (window->overlay) + XResizeWindow(__glutDisplay, window->overlay->win, + window->desiredWidth, window->desiredHeight); + if (__glutMotifHints != None) { + if (workMask & GLUT_FULL_SCREEN_WORK) { + MotifWmHints hints; + + hints.flags = MWM_HINTS_DECORATIONS; + hints.decorations = 0; /* Absolutely no + decorations. */ + XChangeProperty(__glutDisplay, window->win, + __glutMotifHints, __glutMotifHints, 32, + PropModeReplace, (unsigned char *) &hints, 4); + if (workMask & GLUT_MAP_WORK) { + /* Handle case where glutFullScreen is called + before the first time that the window is + mapped. Some window managers will randomly or + interactively position the window the first + time it is mapped if the window's + WM_NORMAL_HINTS property does not request an + explicit position. We don't want any such + window manager interaction when going + fullscreen. Overwrite the WM_NORMAL_HINTS + property installed by glutCreateWindow's + XSetWMProperties property with one explicitly + requesting a fullscreen window. */ + XSizeHints hints; + + hints.flags = USPosition | USSize; + hints.x = 0; + hints.y = 0; + hints.width = window->desiredWidth; + hints.height = window->desiredHeight; + XSetWMNormalHints(__glutDisplay, window->win, &hints); + } + } else { + XDeleteProperty(__glutDisplay, window->win, __glutMotifHints); + } + } + } + if (window->desiredConfMask & CWStackMode) { + changes.stack_mode = window->desiredStack; + /* Do not let glutPushWindow push window beneath the + underlay. */ + if (window->parent && window->parent->overlay + && window->desiredStack == Below) { + changes.stack_mode = Above; + changes.sibling = window->parent->overlay->win; + window->desiredConfMask |= CWSibling; + } + } + XConfigureWindow(__glutDisplay, window->win, + window->desiredConfMask, &changes); + window->desiredConfMask = 0; +#endif + } +#if !defined(_WIN32) + /* Be sure to establish the colormaps BEFORE map window is + done. */ + if (workMask & GLUT_COLORMAP_WORK) { + __glutEstablishColormapsProperty(window); + } +#endif + if (workMask & GLUT_MAP_WORK) { + switch (window->desiredMapState) { + case WithdrawnState: + if (window->parent) { + XUnmapWindow(__glutDisplay, window->win); + } else { + XWithdrawWindow(__glutDisplay, window->win, + __glutScreen); + } + window->shownState = 0; + break; + case NormalState: + XMapWindow(__glutDisplay, window->win); + window->shownState = 1; + break; +#ifdef _WIN32 + case GameModeState: /* Not an Xlib value. */ + ShowWindow(window->win, SW_SHOW); + window->shownState = 1; + break; +#endif + case IconicState: + XIconifyWindow(__glutDisplay, window->win, __glutScreen); + window->shownState = 0; + break; + } + } + } + if (workMask & (GLUT_REDISPLAY_WORK | GLUT_OVERLAY_REDISPLAY_WORK | GLUT_REPAIR_WORK | GLUT_OVERLAY_REPAIR_WORK)) { + if (window->forceReshape) { + /* Guarantee that before a display callback is generated + for a window, a reshape callback must be generated. */ + __glutSetWindow(window); + window->reshape(window->width, window->height); + window->forceReshape = False; + + /* Setting the redisplay bit on the first reshape is + necessary to make the "Mesa glXSwapBuffers to repair + damage" hack operate correctly. Without indicating a + redisplay is necessary, there's not an initial back + buffer render from which to blit from when damage + happens to the window. */ + workMask |= GLUT_REDISPLAY_WORK; + } + /* The code below is more involved than otherwise necessary + because it is paranoid about the overlay or entire window + being removed or destroyed in the course of the callbacks. + Notice how the global __glutWindowDamaged is used to record + the layers' damage status. See the code in glutLayerGet for + how __glutWindowDamaged is used. The point is to not have to + update the "damaged" field after the callback since the + window (or overlay) may be destroyed (or removed) when the + callback returns. */ + + if (window->overlay && window->overlay->display) { + int num = window->num; + Window xid = window->overlay ? window->overlay->win : None; + + /* If an overlay display callback is registered, we + differentiate between a redisplay needed for the + overlay and/or normal plane. If there is no overlay + display callback registered, we simply use the + standard display callback. */ + + if (workMask & (GLUT_REDISPLAY_WORK | GLUT_REPAIR_WORK)) { + if (__glutMesaSwapHackSupport) { + if (window->usedSwapBuffers) { + if ((workMask & (GLUT_REPAIR_WORK | GLUT_REDISPLAY_WORK)) == GLUT_REPAIR_WORK) { + SWAP_BUFFERS_WINDOW(window); + goto skippedDisplayCallback1; + } + } + } + /* Render to normal plane. */ +#ifdef _WIN32 + window->renderDc = window->hdc; +#endif + window->renderWin = window->win; + window->renderCtx = window->ctx; + __glutWindowDamaged = (workMask & GLUT_REPAIR_WORK); + __glutSetWindow(window); + window->usedSwapBuffers = 0; + window->display(); + __glutWindowDamaged = 0; + + skippedDisplayCallback1:; + } + if (workMask & (GLUT_OVERLAY_REDISPLAY_WORK | GLUT_OVERLAY_REPAIR_WORK)) { + window = __glutWindowList[num]; + if (window && window->overlay && + window->overlay->win == xid && window->overlay->display) { + + /* Render to overlay. */ +#ifdef _WIN32 + window->renderDc = window->overlay->hdc; +#endif + window->renderWin = window->overlay->win; + window->renderCtx = window->overlay->ctx; + __glutWindowDamaged = (workMask & GLUT_OVERLAY_REPAIR_WORK); + __glutSetWindow(window); + window->overlay->display(); + __glutWindowDamaged = 0; + } else { + /* Overlay may have since been destroyed or the + overlay callback may have been disabled during + normal display callback. */ + } + } + } else { + if (__glutMesaSwapHackSupport) { + if (!window->overlay && window->usedSwapBuffers) { + if ((workMask & (GLUT_REPAIR_WORK | GLUT_REDISPLAY_WORK)) == GLUT_REPAIR_WORK) { + SWAP_BUFFERS_WINDOW(window); + goto skippedDisplayCallback2; + } + } + } + /* Render to normal plane (and possibly overlay). */ + __glutWindowDamaged = (workMask & (GLUT_OVERLAY_REPAIR_WORK | GLUT_REPAIR_WORK)); + __glutSetWindow(window); + window->usedSwapBuffers = 0; + window->display(); + __glutWindowDamaged = 0; + + skippedDisplayCallback2:; + } + } + /* Combine workMask with window->workMask to determine what + finish and debug work there is. */ + workMask |= window->workMask; + + if (workMask & GLUT_FINISH_WORK) { + /* Finish work makes sure a glFinish gets done to indirect + rendering contexts. Indirect contexts tend to have much + longer latency because lots of OpenGL extension requests + can queue up in the X protocol stream. __glutSetWindow + is where the finish works gets queued for indirect + contexts. */ + __glutSetWindow(window); + glFinish(); + } + if (workMask & GLUT_DEBUG_WORK) { + __glutSetWindow(window); + glutReportErrors(); + } + /* Strip out dummy, finish, and debug work bits. */ + window->workMask &= ~(GLUT_DUMMY_WORK | GLUT_FINISH_WORK | GLUT_DEBUG_WORK); + if (window->workMask) { + /* Leave on work list. */ + return window; + } else { + /* Remove current window from work list. */ + return window->prevWorkWin; + } +} + +#ifndef _WIN32 +static /* X11 implementations do not need this global. */ +#endif +void +__glutProcessWindowWorkLists(void) +{ + if (__glutWindowWorkList) { + GLUTwindow *remainder, *work; + + work = __glutWindowWorkList; + __glutWindowWorkList = NULL; + if (work) { + remainder = processWindowWorkList(work); + if (remainder) { + *beforeEnd = __glutWindowWorkList; + __glutWindowWorkList = remainder; + } + } + } +} + +/* CENTRY */ +void GLUTAPIENTRY +glutMainLoop(void) +{ +#if !defined(_WIN32) + if (!__glutDisplay) + __glutFatalUsage("main loop entered with out proper initialization."); +#endif + if (!__glutWindowListSize) + __glutFatalUsage( + "main loop entered with no windows created."); + for (;;) { + __glutProcessWindowWorkLists(); + if (__glutIdleFunc || __glutWindowWorkList) { + idleWait(); + } else { + if (__glutTimerList) { + waitForSomething(); + } else { + processEventsAndTimeouts(); + } + } + } +} +/* ENDCENTRY */ |