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Diffstat (limited to 'xorg-server/mi/mivaltree.c')
| -rw-r--r-- | xorg-server/mi/mivaltree.c | 821 |
1 files changed, 821 insertions, 0 deletions
diff --git a/xorg-server/mi/mivaltree.c b/xorg-server/mi/mivaltree.c new file mode 100644 index 000000000..d9d07caad --- /dev/null +++ b/xorg-server/mi/mivaltree.c @@ -0,0 +1,821 @@ +/* + * 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. + * + ******************************************************************/ + +/* The panoramix components contained the following notice */ +/***************************************************************** + +Copyright (c) 1991, 1997 Digital Equipment Corporation, Maynard, Massachusetts. + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software. + +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 +DIGITAL EQUIPMENT CORPORATION BE LIABLE FOR ANY CLAIM, DAMAGES, INCLUDING, +BUT NOT LIMITED TO CONSEQUENTIAL OR INCIDENTAL 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 Digital Equipment Corporation +shall not be used in advertising or otherwise to promote the sale, use or other +dealings in this Software without prior written authorization from Digital +Equipment Corporation. + +******************************************************************/ + + + /* + * 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 + */ +#ifdef HAVE_DIX_CONFIG_H +#include <dix-config.h> +#endif + +#include <X11/X.h> +#include "scrnintstr.h" +#include "validate.h" +#include "windowstr.h" +#include "mi.h" +#include "regionstr.h" +#include "mivalidate.h" + +#include "globals.h" + +#ifdef SHAPE +/* + * Compute the visibility of a shaped window + */ +_X_EXPORT int +miShapedWindowIn (pScreen, universe, bounding, rect, x, y) + ScreenPtr pScreen; + RegionPtr universe, bounding; + BoxPtr rect; + int x, y; +{ + BoxRec box; + BoxPtr boundBox; + int nbox; + Bool someIn, someOut; + 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 + +static GetRedirectBorderClipProcPtr miGetRedirectBorderClipProc; +static SetRedirectBorderClipProcPtr miSetRedirectBorderClipProc; + +void +miRegisterRedirectBorderClipProc (SetRedirectBorderClipProcPtr setBorderClip, + GetRedirectBorderClipProcPtr getBorderClip) +{ + miSetRedirectBorderClipProc = setBorderClip; + miGetRedirectBorderClipProc = getBorderClip; +} + +/* + * Manual redirected windows are treated as transparent; they do not obscure + * siblings or parent windows + */ + +#ifdef COMPOSITE +#define TreatAsTransparent(w) ((w)->redirectDraw == RedirectDrawManual) +#else +#define TreatAsTransparent(w) FALSE +#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 ( + WindowPtr pParent, + ScreenPtr pScreen, + RegionPtr universe, + VTKind kind, + RegionPtr exposed ) /* for intermediate calculations */ +{ + int dx, + dy; + RegionRec childUniverse; + 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; + +#ifdef COMPOSITE + /* + * In redirected drawing case, reset universe to borderSize + */ + if (pParent->redirectDraw != RedirectDrawNone) + { + if (miSetRedirectBorderClipProc) + { + if (TreatAsTransparent (pParent)) + REGION_EMPTY (pScreen, universe); + (*miSetRedirectBorderClipProc) (pParent, universe); + } + REGION_COPY(pScreen, universe, &pParent->borderSize); + } +#endif + + 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_NULL(pScreen, + &pChild->valdata->after.borderExposed); + if (HasParentRelativeBorder(pChild)) + { + REGION_SUBTRACT(pScreen, + &pChild->valdata->after.borderExposed, + &pChild->borderClip, + &pChild->winSize); + } + REGION_NULL(pScreen, &pChild->valdata->after.exposed); + } + 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; + case VTBroken: + REGION_EMPTY (pScreen, &pParent->borderClip); + REGION_EMPTY (pScreen, &pParent->clipList); + break; + } + + borderVisible = pParent->valdata->before.borderVisible; + resized = pParent->valdata->before.resized; + REGION_NULL(pScreen, &pParent->valdata->after.borderExposed); + REGION_NULL(pScreen, &pParent->valdata->after.exposed); + + /* + * 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_NULL(pScreen, &childUniverse); + REGION_NULL(pScreen, &childUnion); + 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 && !TreatAsTransparent(pChild)) + REGION_APPEND( pScreen, &childUnion, &pChild->borderSize); + } + } + else + { + for (pChild = pParent->lastChild; pChild; pChild = pChild->prevSib) + { + if (pChild->viewable && !TreatAsTransparent(pChild)) + 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 && !TreatAsTransparent (pChild)) + 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); + } + + /* 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( + WindowPtr pParent ) +{ + WindowPtr pChild; + 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 */ + ScreenPtr pScreen; + WindowPtr pWin; + Bool overlap; + int viewvals; + Bool forward; + + pScreen = pParent->drawable.pScreen; + if (pChild == NullWindow) + pChild = pParent->firstChild; + + REGION_NULL(pScreen, &childClip); + REGION_NULL(pScreen, &exposed); + + /* + * 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_NULL(pScreen, &totalClip); + viewvals = 0; + if (REGION_BROKEN (pScreen, &pParent->clipList) && + !REGION_BROKEN (pScreen, &pParent->borderClip)) + { + kind = VTBroken; + /* + * When rebuilding clip lists after out of memory, + * assume everything is busted. + */ + forward = TRUE; + REGION_COPY (pScreen, &totalClip, &pParent->borderClip); + REGION_INTERSECT (pScreen, &totalClip, &totalClip, &pParent->winSize); + + for (pWin = pParent->firstChild; pWin != pChild; pWin = pWin->nextSib) + { + if (pWin->viewable && !TreatAsTransparent (pWin)) + REGION_SUBTRACT (pScreen, &totalClip, &totalClip, &pWin->borderSize); + } + for (pWin = pChild; pWin; pWin = pWin->nextSib) + if (pWin->valdata && pWin->viewable) + viewvals++; + + REGION_EMPTY (pScreen, &pParent->clipList); + } + else + { + 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) + { + RegionPtr pBorderClip = &pWin->borderClip; +#ifdef COMPOSITE + if (pWin->redirectDraw != RedirectDrawNone && miGetRedirectBorderClipProc) + pBorderClip = (*miGetRedirectBorderClipProc)(pWin); +#endif + REGION_APPEND( pScreen, &totalClip, pBorderClip ); + if (pWin->viewable) + viewvals++; + } + } + } + else + { + forward = FALSE; + pWin = pParent->lastChild; + while (1) + { + if (pWin->valdata) + { + RegionPtr pBorderClip = &pWin->borderClip; +#ifdef COMPOSITE + if (pWin->redirectDraw != RedirectDrawNone && miGetRedirectBorderClipProc) + pBorderClip = (*miGetRedirectBorderClipProc)(pWin); +#endif + REGION_APPEND( pScreen, &totalClip, pBorderClip ); + 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_NULL(pScreen, &childUnion); + if (forward) + { + for (pWin = pChild; pWin; pWin = pWin->nextSib) + if (pWin->valdata && pWin->viewable && !TreatAsTransparent (pWin)) + REGION_APPEND( pScreen, &childUnion, + &pWin->borderSize); + } + else + { + pWin = pParent->lastChild; + while (1) + { + if (pWin->valdata && pWin->viewable && !TreatAsTransparent (pWin)) + 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 && !TreatAsTransparent (pWin)) + { + 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_NULL(pScreen, &pParent->valdata->after.exposed); + REGION_NULL(pScreen, &pParent->valdata->after.borderExposed); + + /* + * 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: + 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); +} |