R6.6 is the Xorg base-lineXORG-MAIN

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diff --git a/include/windowstr.h b/include/windowstr.h
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+/* $Xorg: windowstr.h,v 1.4 2001/02/09 02:05:16 xorgcvs Exp $ */
+/***********************************************************
+
+Copyright 1987, 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 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.
+
+******************************************************************/
+
+#ifndef WINDOWSTRUCT_H
+#define WINDOWSTRUCT_H
+
+#include "window.h"
+#include "pixmapstr.h"
+#include "regionstr.h"
+#include "cursor.h"
+#include "property.h"
+#include "resource.h"	/* for ROOT_WINDOW_ID_BASE */
+#include "dix.h"
+#include "miscstruct.h"
+#include "X11/Xprotostr.h"
+#include "opaque.h"
+
+#define GuaranteeNothing	0
+#define GuaranteeVisBack	1
+
+#define SameBackground(as, a, bs, b)				\
+    ((as) == (bs) && ((as) == None ||				\
+		      (as) == ParentRelative ||			\
+ 		      SamePixUnion(a,b,as == BackgroundPixel)))
+
+#define SameBorder(as, a, bs, b)				\
+    EqualPixUnion(as, a, bs, b)
+
+typedef struct _WindowOpt {
+    VisualID		visual;		   /* default: same as parent */
+    CursorPtr		cursor;		   /* default: window.cursorNone */
+    Colormap		colormap;	   /* default: same as parent */
+    Mask		dontPropagateMask; /* default: window.dontPropagate */
+    Mask		otherEventMasks;   /* default: 0 */
+    struct _OtherClients *otherClients;	   /* default: NULL */
+    struct _GrabRec	*passiveGrabs;	   /* default: NULL */
+    PropertyPtr		userProps;	   /* default: NULL */
+    unsigned long	backingBitPlanes;  /* default: ~0L */
+    unsigned long	backingPixel;	   /* default: 0 */
+#ifdef SHAPE
+    RegionPtr		boundingShape;	   /* default: NULL */
+    RegionPtr		clipShape;	   /* default: NULL */
+#endif
+#ifdef XINPUT
+    struct _OtherInputMasks *inputMasks;   /* default: NULL */
+#endif
+} WindowOptRec, *WindowOptPtr;
+
+#define BackgroundPixel	    2L
+#define BackgroundPixmap    3L
+
+typedef struct _Window {
+    DrawableRec		drawable;
+    WindowPtr		parent;		/* ancestor chain */
+    WindowPtr		nextSib;	/* next lower sibling */
+    WindowPtr		prevSib;	/* next higher sibling */
+    WindowPtr		firstChild;	/* top-most child */
+    WindowPtr		lastChild;	/* bottom-most child */
+    RegionRec		clipList;	/* clipping rectangle for output */
+    RegionRec		borderClip;	/* NotClippedByChildren + border */
+    union _Validate	*valdata;
+    RegionRec		winSize;
+    RegionRec		borderSize;
+    DDXPointRec		origin;		/* position relative to parent */
+    unsigned short	borderWidth;
+    unsigned short	deliverableEvents;
+    Mask		eventMask;
+    PixUnion		background;
+    PixUnion		border;
+    pointer		backStorage;	/* null when BS disabled */
+    WindowOptPtr	optional;
+    unsigned		backgroundState:2; /* None, Relative, Pixel, Pixmap */
+    unsigned		borderIsPixel:1;
+    unsigned		cursorIsNone:1;	/* else real cursor (might inherit) */
+    unsigned		backingStore:2;
+    unsigned		saveUnder:1;
+    unsigned		DIXsaveUnder:1;
+    unsigned		bitGravity:4;
+    unsigned		winGravity:4;
+    unsigned		overrideRedirect:1;
+    unsigned		visibility:2;
+    unsigned		mapped:1;
+    unsigned		realized:1;	/* ancestors are all mapped */
+    unsigned		viewable:1;	/* realized && InputOutput */
+    unsigned		dontPropagate:3;/* index into DontPropagateMasks */
+    unsigned		forcedBS:1;	/* system-supplied backingStore */
+#ifdef NEED_DBE_BUF_BITS
+#define DBE_FRONT_BUFFER 1
+#define DBE_BACK_BUFFER  0
+    unsigned		dstBuffer:1;	/* destination buffer for rendering */
+    unsigned		srcBuffer:1;	/* source buffer for rendering */
+#endif
+    DevUnion		*devPrivates;
+} WindowRec;
+
+/*
+ * Ok, a bunch of macros for accessing the optional record
+ * fields (or filling the appropriate default value)
+ */
+
+extern Mask	    DontPropagateMasks[];
+
+#define wTrackParent(w,field)	((w)->optional ? \
+				    (w)->optional->field \
+ 				 : FindWindowWithOptional(w)->optional->field)
+#define wUseDefault(w,field,def)	((w)->optional ? \
+				    (w)->optional->field \
+				 : def)
+
+#define wVisual(w)		wTrackParent(w, visual)
+#define wCursor(w)		((w)->cursorIsNone ? None : wTrackParent(w, cursor))
+#define wColormap(w)		((w)->drawable.class == InputOnly ? None : wTrackParent(w, colormap))
+#define wDontPropagateMask(w)	wUseDefault(w, dontPropagateMask, DontPropagateMasks[(w)->dontPropagate])
+#define wOtherEventMasks(w)	wUseDefault(w, otherEventMasks, 0)
+#define wOtherClients(w)	wUseDefault(w, otherClients, NULL)
+#ifdef XINPUT
+#define wOtherInputMasks(w)	wUseDefault(w, inputMasks, NULL)
+#else
+#define wOtherInputMasks(w)	NULL
+#endif
+#define wPassiveGrabs(w)	wUseDefault(w, passiveGrabs, NULL)
+#define wUserProps(w)		wUseDefault(w, userProps, NULL)
+#define wBackingBitPlanes(w)	wUseDefault(w, backingBitPlanes, ~0L)
+#define wBackingPixel(w)	wUseDefault(w, backingPixel, 0)
+#ifdef SHAPE
+#define wBoundingShape(w)	wUseDefault(w, boundingShape, NULL)
+#define wClipShape(w)		wUseDefault(w, clipShape, NULL)
+#endif
+#define wClient(w)		(clients[CLIENT_ID((w)->drawable.id)])
+#define wBorderWidth(w)		((int) (w)->borderWidth)
+
+/* true when w needs a border drawn. */
+
+#ifdef SHAPE
+#define HasBorder(w)	((w)->borderWidth || wClipShape(w))
+#else
+#define HasBorder(w)	((w)->borderWidth)
+#endif
+
+typedef struct _ScreenSaverStuff {
+    WindowPtr pWindow;
+    XID       wid;
+    char      blanked;
+    Bool      (*ExternalScreenSaver)(
+#if NeedNestedPrototypes
+	ScreenPtr	/*pScreen*/,
+	int		/*xstate*/,
+	Bool		/*force*/
+#endif
+    );
+} ScreenSaverStuffRec, *ScreenSaverStuffPtr;
+
+#define SCREEN_IS_BLANKED   0
+#define SCREEN_ISNT_SAVED   1
+#define SCREEN_IS_TILED     2
+#define SCREEN_IS_BLACK	    3
+
+#define HasSaverWindow(i)   (savedScreenInfo[i].pWindow != NullWindow)
+
+extern int screenIsSaved;
+extern ScreenSaverStuffRec savedScreenInfo[MAXSCREENS];
+
+/*
+ * this is the configuration parameter "NO_BACK_SAVE"
+ * it means that any existant backing store should not 
+ * be used to implement save unders.
+ */
+
+#ifndef NO_BACK_SAVE
+#define DO_SAVE_UNDERS(pWin)	((pWin)->drawable.pScreen->saveUnderSupport ==\
+				 USE_DIX_SAVE_UNDERS)
+/*
+ * saveUnderSupport is set to this magic value when using DIXsaveUnders
+ */
+
+#define USE_DIX_SAVE_UNDERS	0x40
+#endif
+
+extern int numSaveUndersViewable;
+extern int deltaSaveUndersViewable;
+
+#endif /* WINDOWSTRUCT_H */