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+/* $Xorg: mivaltree.c,v 1.4 2001/02/09 02:05:22 xorgcvs Exp $ */
+/*
+ * mivaltree.c --
+ * Functions for recalculating window clip lists. Main function
+ * is miValidateTree.
+ *
+
+Copyright 1987, 1988, 1989, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+ *
+ * Copyright 1987, 1988, 1989 by
+ * Digital Equipment Corporation, Maynard, Massachusetts,
+ *
+ * All Rights Reserved
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose and without fee is hereby granted,
+ * provided that the above copyright notice appear in all copies and that
+ * both that copyright notice and this permission notice appear in
+ * supporting documentation, and that the name of Digital not be
+ * used in advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ *
+ * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+ * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ *
+ ******************************************************************/
+
+ /*
+ * Aug '86: Susan Angebranndt -- original code
+ * July '87: Adam de Boor -- substantially modified and commented
+ * Summer '89: Joel McCormack -- so fast you wouldn't believe it possible.
+ * In particular, much improved code for window mapping and
+ * circulating.
+ * Bob Scheifler -- avoid miComputeClips for unmapped windows,
+ * valdata changes
+ */
+
+#include "X.h"
+#include "scrnintstr.h"
+#include "validate.h"
+#include "windowstr.h"
+#include "mi.h"
+#include "regionstr.h"
+#include "mivalidate.h"
+
+#ifdef SHAPE
+/*
+ * Compute the visibility of a shaped window
+ */
+miShapedWindowIn (pScreen, universe, bounding, rect, x, y)
+ ScreenPtr pScreen;
+ RegionPtr universe, bounding;
+ BoxPtr rect;
+ register int x, y;
+{
+ BoxRec box;
+ register BoxPtr boundBox;
+ int nbox;
+ Bool someIn, someOut;
+ register int t, x1, y1, x2, y2;
+
+ nbox = REGION_NUM_RECTS (bounding);
+ boundBox = REGION_RECTS (bounding);
+ someIn = someOut = FALSE;
+ x1 = rect->x1;
+ y1 = rect->y1;
+ x2 = rect->x2;
+ y2 = rect->y2;
+ while (nbox--)
+ {
+ if ((t = boundBox->x1 + x) < x1)
+ t = x1;
+ box.x1 = t;
+ if ((t = boundBox->y1 + y) < y1)
+ t = y1;
+ box.y1 = t;
+ if ((t = boundBox->x2 + x) > x2)
+ t = x2;
+ box.x2 = t;
+ if ((t = boundBox->y2 + y) > y2)
+ t = y2;
+ box.y2 = t;
+ if (box.x1 > box.x2)
+ box.x2 = box.x1;
+ if (box.y1 > box.y2)
+ box.y2 = box.y1;
+ switch (RECT_IN_REGION(pScreen, universe, &box))
+ {
+ case rgnIN:
+ if (someOut)
+ return rgnPART;
+ someIn = TRUE;
+ break;
+ case rgnOUT:
+ if (someIn)
+ return rgnPART;
+ someOut = TRUE;
+ break;
+ default:
+ return rgnPART;
+ }
+ boundBox++;
+ }
+ if (someIn)
+ return rgnIN;
+ return rgnOUT;
+}
+#endif
+
+#define HasParentRelativeBorder(w) (!(w)->borderIsPixel && \
+ HasBorder(w) && \
+ (w)->backgroundState == ParentRelative)
+
+/*-
+ *-----------------------------------------------------------------------
+ * miComputeClips --
+ * Recompute the clipList, borderClip, exposed and borderExposed
+ * regions for pParent and its children. Only viewable windows are
+ * taken into account.
+ *
+ * Results:
+ * None.
+ *
+ * Side Effects:
+ * clipList, borderClip, exposed and borderExposed are altered.
+ * A VisibilityNotify event may be generated on the parent window.
+ *
+ *-----------------------------------------------------------------------
+ */
+
+static void
+miComputeClips (pParent, pScreen, universe, kind, exposed)
+ register WindowPtr pParent;
+ register ScreenPtr pScreen;
+ register RegionPtr universe;
+ VTKind kind;
+ RegionPtr exposed; /* for intermediate calculations */
+{
+ int dx,
+ dy;
+ RegionRec childUniverse;
+ register WindowPtr pChild;
+ int oldVis, newVis;
+ BoxRec borderSize;
+ RegionRec childUnion;
+ Bool overlap;
+ RegionPtr borderVisible;
+ Bool resized;
+
+ /*
+ * Figure out the new visibility of this window.
+ * The extent of the universe should be the same as the extent of
+ * the borderSize region. If the window is unobscured, this rectangle
+ * will be completely inside the universe (the universe will cover it
+ * completely). If the window is completely obscured, none of the
+ * universe will cover the rectangle.
+ */
+
+ borderSize.x1 = pParent->drawable.x - wBorderWidth(pParent);
+ borderSize.y1 = pParent->drawable.y - wBorderWidth(pParent);
+ dx = (int) pParent->drawable.x + (int) pParent->drawable.width + wBorderWidth(pParent);
+ if (dx > 32767)
+ dx = 32767;
+ borderSize.x2 = dx;
+ dy = (int) pParent->drawable.y + (int) pParent->drawable.height + wBorderWidth(pParent);
+ if (dy > 32767)
+ dy = 32767;
+ borderSize.y2 = dy;
+
+ oldVis = pParent->visibility;
+ switch (RECT_IN_REGION( pScreen, universe, &borderSize))
+ {
+ case rgnIN:
+ newVis = VisibilityUnobscured;
+ break;
+ case rgnPART:
+ newVis = VisibilityPartiallyObscured;
+#ifdef SHAPE
+ {
+ RegionPtr pBounding;
+
+ if ((pBounding = wBoundingShape (pParent)))
+ {
+ switch (miShapedWindowIn (pScreen, universe, pBounding,
+ &borderSize,
+ pParent->drawable.x,
+ pParent->drawable.y))
+ {
+ case rgnIN:
+ newVis = VisibilityUnobscured;
+ break;
+ case rgnOUT:
+ newVis = VisibilityFullyObscured;
+ break;
+ }
+ }
+ }
+#endif
+ break;
+ default:
+ newVis = VisibilityFullyObscured;
+ break;
+ }
+ pParent->visibility = newVis;
+ if (oldVis != newVis &&
+ ((pParent->eventMask | wOtherEventMasks(pParent)) & VisibilityChangeMask))
+ SendVisibilityNotify(pParent);
+
+ dx = pParent->drawable.x - pParent->valdata->before.oldAbsCorner.x;
+ dy = pParent->drawable.y - pParent->valdata->before.oldAbsCorner.y;
+
+ /*
+ * avoid computations when dealing with simple operations
+ */
+
+ switch (kind) {
+ case VTMap:
+ case VTStack:
+ case VTUnmap:
+ break;
+ case VTMove:
+ if ((oldVis == newVis) &&
+ ((oldVis == VisibilityFullyObscured) ||
+ (oldVis == VisibilityUnobscured)))
+ {
+ pChild = pParent;
+ while (1)
+ {
+ if (pChild->viewable)
+ {
+ if (pChild->visibility != VisibilityFullyObscured)
+ {
+ REGION_TRANSLATE( pScreen, &pChild->borderClip,
+ dx, dy);
+ REGION_TRANSLATE( pScreen, &pChild->clipList,
+ dx, dy);
+ pChild->drawable.serialNumber = NEXT_SERIAL_NUMBER;
+ if (pScreen->ClipNotify)
+ (* pScreen->ClipNotify) (pChild, dx, dy);
+
+ }
+ if (pChild->valdata)
+ {
+ REGION_INIT(pScreen,
+ &pChild->valdata->after.borderExposed,
+ NullBox, 0);
+ if (HasParentRelativeBorder(pChild))
+ {
+ REGION_SUBTRACT(pScreen,
+ &pChild->valdata->after.borderExposed,
+ &pChild->borderClip,
+ &pChild->winSize);
+ }
+ REGION_INIT( pScreen, &pChild->valdata->after.exposed,
+ NullBox, 0);
+ }
+ if (pChild->firstChild)
+ {
+ pChild = pChild->firstChild;
+ continue;
+ }
+ }
+ while (!pChild->nextSib && (pChild != pParent))
+ pChild = pChild->parent;
+ if (pChild == pParent)
+ break;
+ pChild = pChild->nextSib;
+ }
+ return;
+ }
+ /* fall through */
+ default:
+ /*
+ * To calculate exposures correctly, we have to translate the old
+ * borderClip and clipList regions to the window's new location so there
+ * is a correspondence between pieces of the new and old clipping regions.
+ */
+ if (dx || dy)
+ {
+ /*
+ * We translate the old clipList because that will be exposed or copied
+ * if gravity is right.
+ */
+ REGION_TRANSLATE( pScreen, &pParent->borderClip, dx, dy);
+ REGION_TRANSLATE( pScreen, &pParent->clipList, dx, dy);
+ }
+ break;
+ }
+
+ borderVisible = pParent->valdata->before.borderVisible;
+ resized = pParent->valdata->before.resized;
+ REGION_INIT( pScreen, &pParent->valdata->after.borderExposed, NullBox, 0);
+ REGION_INIT( pScreen, &pParent->valdata->after.exposed, NullBox, 0);
+
+ /*
+ * Since the borderClip must not be clipped by the children, we do
+ * the border exposure first...
+ *
+ * 'universe' is the window's borderClip. To figure the exposures, remove
+ * the area that used to be exposed from the new.
+ * This leaves a region of pieces that weren't exposed before.
+ */
+
+ if (HasBorder (pParent))
+ {
+ if (borderVisible)
+ {
+ /*
+ * when the border changes shape, the old visible portions
+ * of the border will be saved by DIX in borderVisible --
+ * use that region and destroy it
+ */
+ REGION_SUBTRACT( pScreen, exposed, universe, borderVisible);
+ REGION_DESTROY( pScreen, borderVisible);
+ }
+ else
+ {
+ REGION_SUBTRACT( pScreen, exposed, universe, &pParent->borderClip);
+ }
+ if (HasParentRelativeBorder(pParent) && (dx || dy))
+ REGION_SUBTRACT( pScreen, &pParent->valdata->after.borderExposed,
+ universe,
+ &pParent->winSize);
+ else
+ REGION_SUBTRACT( pScreen, &pParent->valdata->after.borderExposed,
+ exposed, &pParent->winSize);
+
+ REGION_COPY( pScreen, &pParent->borderClip, universe);
+
+ /*
+ * To get the right clipList for the parent, and to make doubly sure
+ * that no child overlaps the parent's border, we remove the parent's
+ * border from the universe before proceeding.
+ */
+
+ REGION_INTERSECT( pScreen, universe, universe, &pParent->winSize);
+ }
+ else
+ REGION_COPY( pScreen, &pParent->borderClip, universe);
+
+ if ((pChild = pParent->firstChild) && pParent->mapped)
+ {
+ REGION_INIT(pScreen, &childUniverse, NullBox, 0);
+ REGION_INIT(pScreen, &childUnion, NullBox, 0);
+ if ((pChild->drawable.y < pParent->lastChild->drawable.y) ||
+ ((pChild->drawable.y == pParent->lastChild->drawable.y) &&
+ (pChild->drawable.x < pParent->lastChild->drawable.x)))
+ {
+ for (; pChild; pChild = pChild->nextSib)
+ {
+ if (pChild->viewable)
+ REGION_APPEND( pScreen, &childUnion, &pChild->borderSize);
+ }
+ }
+ else
+ {
+ for (pChild = pParent->lastChild; pChild; pChild = pChild->prevSib)
+ {
+ if (pChild->viewable)
+ REGION_APPEND( pScreen, &childUnion, &pChild->borderSize);
+ }
+ }
+ REGION_VALIDATE( pScreen, &childUnion, &overlap);
+
+ for (pChild = pParent->firstChild;
+ pChild;
+ pChild = pChild->nextSib)
+ {
+ if (pChild->viewable) {
+ /*
+ * If the child is viewable, we want to remove its extents
+ * from the current universe, but we only re-clip it if
+ * it's been marked.
+ */
+ if (pChild->valdata) {
+ /*
+ * Figure out the new universe from the child's
+ * perspective and recurse.
+ */
+ REGION_INTERSECT( pScreen, &childUniverse,
+ universe,
+ &pChild->borderSize);
+ miComputeClips (pChild, pScreen, &childUniverse, kind,
+ exposed);
+ }
+ /*
+ * Once the child has been processed, we remove its extents
+ * from the current universe, thus denying its space to any
+ * other sibling.
+ */
+ if (overlap)
+ REGION_SUBTRACT( pScreen, universe, universe,
+ &pChild->borderSize);
+ }
+ }
+ if (!overlap)
+ REGION_SUBTRACT( pScreen, universe, universe, &childUnion);
+ REGION_UNINIT( pScreen, &childUnion);
+ REGION_UNINIT( pScreen, &childUniverse);
+ } /* if any children */
+
+ /*
+ * 'universe' now contains the new clipList for the parent window.
+ *
+ * To figure the exposure of the window we subtract the old clip from the
+ * new, just as for the border.
+ */
+
+ if (oldVis == VisibilityFullyObscured ||
+ oldVis == VisibilityNotViewable)
+ {
+ REGION_COPY( pScreen, &pParent->valdata->after.exposed, universe);
+ }
+ else if (newVis != VisibilityFullyObscured &&
+ newVis != VisibilityNotViewable)
+ {
+ REGION_SUBTRACT( pScreen, &pParent->valdata->after.exposed,
+ universe, &pParent->clipList);
+ }
+
+ /*
+ * One last thing: backing storage. We have to try to save what parts of
+ * the window are about to be obscured. We can just subtract the universe
+ * from the old clipList and get the areas that were in the old but aren't
+ * in the new and, hence, are about to be obscured.
+ */
+ if (pParent->backStorage && !resized)
+ {
+ REGION_SUBTRACT( pScreen, exposed, &pParent->clipList, universe);
+ (* pScreen->SaveDoomedAreas)(pParent, exposed, dx, dy);
+ }
+
+ /* HACK ALERT - copying contents of regions, instead of regions */
+ {
+ RegionRec tmp;
+
+ tmp = pParent->clipList;
+ pParent->clipList = *universe;
+ *universe = tmp;
+ }
+
+#ifdef NOTDEF
+ REGION_COPY( pScreen, &pParent->clipList, universe);
+#endif
+
+ pParent->drawable.serialNumber = NEXT_SERIAL_NUMBER;
+
+ if (pScreen->ClipNotify)
+ (* pScreen->ClipNotify) (pParent, dx, dy);
+}
+
+static void
+miTreeObscured(pParent)
+ register WindowPtr pParent;
+{
+ register WindowPtr pChild;
+ register int oldVis;
+
+ pChild = pParent;
+ while (1)
+ {
+ if (pChild->viewable)
+ {
+ oldVis = pChild->visibility;
+ if (oldVis != (pChild->visibility = VisibilityFullyObscured) &&
+ ((pChild->eventMask | wOtherEventMasks(pChild)) & VisibilityChangeMask))
+ SendVisibilityNotify(pChild);
+ if (pChild->firstChild)
+ {
+ pChild = pChild->firstChild;
+ continue;
+ }
+ }
+ while (!pChild->nextSib && (pChild != pParent))
+ pChild = pChild->parent;
+ if (pChild == pParent)
+ break;
+ pChild = pChild->nextSib;
+ }
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miValidateTree --
+ * Recomputes the clip list for pParent and all its inferiors.
+ *
+ * Results:
+ * Always returns 1.
+ *
+ * Side Effects:
+ * The clipList, borderClip, exposed, and borderExposed regions for
+ * each marked window are altered.
+ *
+ * Notes:
+ * This routine assumes that all affected windows have been marked
+ * (valdata created) and their winSize and borderSize regions
+ * adjusted to correspond to their new positions. The borderClip and
+ * clipList regions should not have been touched.
+ *
+ * The top-most level is treated differently from all lower levels
+ * because pParent is unchanged. For the top level, we merge the
+ * regions taken up by the marked children back into the clipList
+ * for pParent, thus forming a region from which the marked children
+ * can claim their areas. For lower levels, where the old clipList
+ * and borderClip are invalid, we can't do this and have to do the
+ * extra operations done in miComputeClips, but this is much faster
+ * e.g. when only one child has moved...
+ *
+ *-----------------------------------------------------------------------
+ */
+/*ARGSUSED*/
+int
+miValidateTree (pParent, pChild, kind)
+ WindowPtr pParent; /* Parent to validate */
+ WindowPtr pChild; /* First child of pParent that was
+ * affected */
+ VTKind kind; /* What kind of configuration caused call */
+{
+ RegionRec totalClip; /* Total clipping region available to
+ * the marked children. pParent's clipList
+ * merged with the borderClips of all
+ * the marked children. */
+ RegionRec childClip; /* The new borderClip for the current
+ * child */
+ RegionRec childUnion; /* the space covered by borderSize for
+ * all marked children */
+ RegionRec exposed; /* For intermediate calculations */
+ register ScreenPtr pScreen;
+ register WindowPtr pWin;
+ Bool overlap;
+ int viewvals;
+ Bool forward;
+
+ pScreen = pParent->drawable.pScreen;
+ if (pChild == NullWindow)
+ pChild = pParent->firstChild;
+
+ REGION_INIT(pScreen, &childClip, NullBox, 0);
+ REGION_INIT(pScreen, &exposed, NullBox, 0);
+
+ /*
+ * compute the area of the parent window occupied
+ * by the marked children + the parent itself. This
+ * is the area which can be divied up among the marked
+ * children in their new configuration.
+ */
+ REGION_INIT(pScreen, &totalClip, NullBox, 0);
+ viewvals = 0;
+ if ((pChild->drawable.y < pParent->lastChild->drawable.y) ||
+ ((pChild->drawable.y == pParent->lastChild->drawable.y) &&
+ (pChild->drawable.x < pParent->lastChild->drawable.x)))
+ {
+ forward = TRUE;
+ for (pWin = pChild; pWin; pWin = pWin->nextSib)
+ {
+ if (pWin->valdata)
+ {
+ REGION_APPEND( pScreen, &totalClip, &pWin->borderClip);
+ if (pWin->viewable)
+ viewvals++;
+ }
+ }
+ }
+ else
+ {
+ forward = FALSE;
+ pWin = pParent->lastChild;
+ while (1)
+ {
+ if (pWin->valdata)
+ {
+ REGION_APPEND( pScreen, &totalClip, &pWin->borderClip);
+ if (pWin->viewable)
+ viewvals++;
+ }
+ if (pWin == pChild)
+ break;
+ pWin = pWin->prevSib;
+ }
+ }
+ REGION_VALIDATE( pScreen, &totalClip, &overlap);
+
+ /*
+ * Now go through the children of the root and figure their new
+ * borderClips from the totalClip, passing that off to miComputeClips
+ * to handle recursively. Once that's done, we remove the child
+ * from the totalClip to clip any siblings below it.
+ */
+
+ overlap = TRUE;
+ if (kind != VTStack)
+ {
+ REGION_UNION( pScreen, &totalClip, &totalClip, &pParent->clipList);
+ if (viewvals > 1)
+ {
+ /*
+ * precompute childUnion to discover whether any of them
+ * overlap. This seems redundant, but performance studies
+ * have demonstrated that the cost of this loop is
+ * lower than the cost of multiple Subtracts in the
+ * loop below.
+ */
+ REGION_INIT(pScreen, &childUnion, NullBox, 0);
+ if (forward)
+ {
+ for (pWin = pChild; pWin; pWin = pWin->nextSib)
+ if (pWin->valdata && pWin->viewable)
+ REGION_APPEND( pScreen, &childUnion,
+ &pWin->borderSize);
+ }
+ else
+ {
+ pWin = pParent->lastChild;
+ while (1)
+ {
+ if (pWin->valdata && pWin->viewable)
+ REGION_APPEND( pScreen, &childUnion,
+ &pWin->borderSize);
+ if (pWin == pChild)
+ break;
+ pWin = pWin->prevSib;
+ }
+ }
+ REGION_VALIDATE(pScreen, &childUnion, &overlap);
+ if (overlap)
+ REGION_UNINIT(pScreen, &childUnion);
+ }
+ }
+
+ for (pWin = pChild;
+ pWin != NullWindow;
+ pWin = pWin->nextSib)
+ {
+ if (pWin->viewable) {
+ if (pWin->valdata) {
+ REGION_INTERSECT( pScreen, &childClip,
+ &totalClip,
+ &pWin->borderSize);
+ miComputeClips (pWin, pScreen, &childClip, kind, &exposed);
+ if (overlap)
+ {
+ REGION_SUBTRACT( pScreen, &totalClip,
+ &totalClip,
+ &pWin->borderSize);
+ }
+ } else if (pWin->visibility == VisibilityNotViewable) {
+ miTreeObscured(pWin);
+ }
+ } else {
+ if (pWin->valdata) {
+ REGION_EMPTY( pScreen, &pWin->clipList);
+ if (pScreen->ClipNotify)
+ (* pScreen->ClipNotify) (pWin, 0, 0);
+ REGION_EMPTY( pScreen, &pWin->borderClip);
+ pWin->valdata = (ValidatePtr)NULL;
+ }
+ }
+ }
+
+ REGION_UNINIT( pScreen, &childClip);
+ if (!overlap)
+ {
+ REGION_SUBTRACT(pScreen, &totalClip, &totalClip, &childUnion);
+ REGION_UNINIT(pScreen, &childUnion);
+ }
+
+ REGION_INIT( pScreen, &pParent->valdata->after.exposed, NullBox, 0);
+ REGION_INIT( pScreen, &pParent->valdata->after.borderExposed, NullBox, 0);
+
+ /*
+ * each case below is responsible for updating the
+ * clipList and serial number for the parent window
+ */
+
+ switch (kind) {
+ case VTStack:
+ break;
+ default:
+ /*
+ * totalClip contains the new clipList for the parent. Figure out
+ * exposures and obscures as per miComputeClips and reset the parent's
+ * clipList.
+ */
+ REGION_SUBTRACT( pScreen, &pParent->valdata->after.exposed,
+ &totalClip, &pParent->clipList);
+ /* fall through */
+ case VTMap:
+ if (pParent->backStorage) {
+ REGION_SUBTRACT( pScreen, &exposed, &pParent->clipList, &totalClip);
+ (* pScreen->SaveDoomedAreas)(pParent, &exposed, 0, 0);
+ }
+
+ REGION_COPY( pScreen, &pParent->clipList, &totalClip);
+ pParent->drawable.serialNumber = NEXT_SERIAL_NUMBER;
+ break;
+ }
+
+ REGION_UNINIT( pScreen, &totalClip);
+ REGION_UNINIT( pScreen, &exposed);
+ if (pScreen->ClipNotify)
+ (*pScreen->ClipNotify) (pParent, 0, 0);
+ return (1);
+}
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