/* $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. * ******************************************************************/ /* The panoramix components contained the following notice */ /**************************************************************** * * * Copyright (c) Digital Equipment Corporation, 1991, 1997 * * * * All Rights Reserved. Unpublished rights reserved under * * the copyright laws of the United States. * * * * The software contained on this media is proprietary to * * and embodies the confidential technology of Digital * * Equipment Corporation. Possession, use, duplication or * * dissemination of the software and media is authorized only * * pursuant to a valid written license from Digital Equipment * * Corporation. * * * * RESTRICTED RIGHTS LEGEND Use, duplication, or disclosure * * by the U.S. Government is subject to restrictions as set * * forth in Subparagraph (c)(1)(ii) of DFARS 252.227-7013, * * or in FAR 52.227-19, as applicable. * * * *****************************************************************/ /* $XFree86: xc/programs/Xserver/mi/mivaltree.c,v 1.10 2003/11/10 18:22:49 tsi Exp $ */ /* * 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" #include "globals.h" #ifdef SHAPE /* * Compute the visibility of a shaped window */ int 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 ( 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_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) 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( 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_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) 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) { 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_NULL(pScreen, &childUnion); 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_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: 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); }