/* Copyright (c) Mark J. Kilgard, 1994, 1995, 1996. */
/* 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. */
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <assert.h>
#ifdef __sgi
#include <bstring.h> /* prototype for bzero used by FD_ZERO */
#endif
#ifdef AIXV3
#include <sys/select.h> /* select system call interface */
#endif
#include <sys/types.h>
#if !defined(WIN32)
#ifndef __vms
#include <sys/time.h>
#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
#endif /* !WIN32 */
#ifdef __hpux
/* XXX Bert Gijsbers <bert@mc.bio.uva.nl> 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
#ifdef __vms
#include <ssdef.h>
#include <psldef.h>
extern int SYS$CLREF(int efn);
extern int SYS$SETIMR(unsigned int efn, struct timeval *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 */
#include <GL/glut.h>
#include "glutint.h"
static GLUTtimer *freeTimerList = NULL;
static int mappedMenuButton;
GLUTidleCB __glutIdleFunc = NULL;
GLUTtimer *__glutTimerList = NULL;
#ifdef SUPPORT_FORTRAN
GLUTtimer *__glutNewTimer;
#endif
GLUTwindow *__glutWindowWorkList = NULL;
void (*__glutUpdateInputDeviceMaskFunc) (GLUTwindow *);
Atom __glutMotifHints = None;
/* Modifier mask of ~0 implies not in core input callback. */
unsigned int __glutModifierMask = (unsigned int) ~0;
int __glutWindowDamaged = 0;
void APIENTRY
glutIdleFunc(GLUTidleCB idleFunc)
{
__glutIdleFunc = idleFunc;
}
void APIENTRY
glutTimerFunc(unsigned int interval, GLUTtimerCB timerFunc, int value)
{
GLUTtimer *timer, *other;
GLUTtimer **prevptr;
struct timeval now;
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;
#ifdef __vms
/* 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)
{
struct timeval now;
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;
timer->func(timer->value);
__glutTimerList = timer->next;
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;
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 APIENTRY
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 APIENTRY
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;
}
}
}
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;
}
}
}
#if !defined(WIN32)
/* 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;
}
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
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 */
#else
GLUTeventParser *parser;
XEvent event, ahead;
GLUTwindow *window;
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);
}
else window->reshape(width, height);
}
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);
if (window) {
GLUTmenu *menu;
menu = __glutGetMenuByNum(
window->menu[event.xbutton.button - 1]);
if (menu) {
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 KeyRelease:
window = __glutGetWindow(event.xkey.window);
if (window->special) {
KeySym ks;
ks = XLookupKeysym((XKeyEvent *) &event, 0);
window->special(ks, 0, 0);
}
break;
case KeyPress:
window = __glutGetWindow(event.xkey.window);
if (!window) {
break;
}
if (window->keyboard) {
char tmp[1];
int rc;
rc = XLookupString(&event.xkey, tmp, sizeof(tmp),
NULL, NULL);
if (rc) {
__glutSetWindow(window);
__glutModifierMask = event.xkey.state;
window->keyboard(tmp[0],
event.xkey.x, event.xkey.y);
__glutModifierMask = ~0;
}
}
window = __glutGetWindow(event.xkey.window);
if (window->special) {
KeySym ks;
ks = XLookupKeysym((XKeyEvent *) &event, 0);
window->special(ks, 1, 0);
}
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)
{
#ifdef __vms
static struct timeval 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
struct timeval now, timeout, waittime;
#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;
}
#ifdef __vms
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 vms */
#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
#if 0 /* XXX Nate, what is this junk? */
/* Set up a timer to fire in at least a millisecond, then wait for
the message. This should act like a select. */
SetTimer(NULL, 2, waittime.tv_usec, NULL);
WaitMessage();
KillTimer(NULL, 2);
#endif
/* Actually, a sleep seems to do the trick -- do we even need this? */
Sleep(0);
#endif
#endif /* not vms */
/* 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 IF TOPLEVEL WINDOW. */
if (!window->parent) {
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_BOTTOM,
changes.left, changes.top,
changes.right - changes.left, changes.bottom - changes.top,
flags);
if(window->desiredStack == Above)
SetFocus(__glutCurrentWindow->win);
/* 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;
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) {
glXSwapBuffers(__glutDisplay, window->win);
goto skippedDisplayCallback1;
}
}
}
/* Render to normal plane. */
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. */
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) {
glXSwapBuffers(__glutDisplay, window->win);
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;
}
}
/* CENTRY */
void APIENTRY
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 (;;) {
if (__glutWindowWorkList) {
GLUTwindow *remainder, *work;
work = __glutWindowWorkList;
__glutWindowWorkList = NULL;
if (work) {
remainder = processWindowWorkList(work);
if (remainder) {
*beforeEnd = __glutWindowWorkList;
__glutWindowWorkList = remainder;
}
}
}
if (__glutIdleFunc || __glutWindowWorkList) {
idleWait();
} else {
if (__glutTimerList) {
waitForSomething();
} else {
processEventsAndTimeouts();
}
}
}
}
void
glutDoWorkList(void)
{
if (__glutWindowWorkList) {
GLUTwindow *remainder, *work;
work = __glutWindowWorkList;
__glutWindowWorkList = NULL;
if (work) {
remainder = processWindowWorkList(work);
if (remainder) {
*beforeEnd = __glutWindowWorkList;
__glutWindowWorkList = remainder;
}
}
}
return;
}
/* ENDCENTRY */