git update 22/4/2010

1 files changed, 0 insertions, 1007 deletions

diff --git a/xorg-server/Xext/mbufbf.c b/xorg-server/Xext/mbufbf.c
deleted file mode 100644
index 7d9d60a4f..000000000
--- a/xorg-server/Xext/mbufbf.c
+++ /dev/null
@@ -1,1007 +0,0 @@
-/*
-
-Copyright 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.
-
-*/
-
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include <stdio.h>
-#include <X11/X.h>
-#include <X11/Xproto.h>
-#include "misc.h"
-#include "os.h"
-#include "windowstr.h"
-#include "scrnintstr.h"
-#include "pixmapstr.h"
-#include "extnsionst.h"
-#include "dixstruct.h"
-#include "resource.h"
-#include "opaque.h"
-#include "regionstr.h"
-#include "gcstruct.h"
-#include "inputstr.h"
-#include "validate.h"
-#include "globals.h"
-#include <sys/time.h>
-
-#define _MULTIBUF_SERVER_	/* don't want Xlib structures */
-#define _MULTIBUF_BUFFER_
-#include <X11/extensions/multibufst.h>
-
-/* 
-Support for doublebuffer hardare
-
-This code is designed to support doublebuffer hardware where the
-displayed buffer is selected on a per-pixel basis by an additional bit
-plane, called the select plane. It could probably be easily modified
-to work with systems that use window-id planes.
-
-This is done by creating a new drawable type, DRAWABLE_BUFFER. The
-type has the same exact layout as a window drawable. Your code should
-treat a DRAWABLE_BUFFER the same as it would tread a DRAWABLE_WINDOW
-when handling the gc drawing functions. In addition, PaintWindowBackground,
-CopyWindow, and all of the gc drawing functions to be able to draw into both
-framebuffers. Which framebuffer to draw into is selected by the contents of
-	pWin->devPrivates[frameWindowPrivateIndex].
-The content of the devPrivate is either from frameBuffer[0] or
-frameBuffer[1], depending on which buffer is being drawn into. When
-	pWin->devPrivates[frameWindowPrivateIndex] == frameBuffer[0],
-the functions should draw into the front framebuffer. When
-	pWin->devPrivates[frameWindowPrivateIndex] == frameBuffer[1],
-the functions should draw into the back framebuffer.
-
-In addition, you need to provide a function that allows you to copy
-bits between the buffers (optional since CopyArea can be used) and a
-function that draws into the select plane. Then, you need to register
-your functions and other information, by calling:
-
-void
-RegisterDoubleBufferHardware(pScreen, nInfo, pInfo, frameBuffer, selectPlane,
-			     CopyBufferBitsFunc, DrawSelectPlaneFunc)
-    int			nInfo;
-    xMbufBufferInfo	*pInfo;
-    DevUnion		*frameBuffer;
-    DevUnion		selectPlane;
-
-"pInfo" is an array indicating which visuals and depths that double
-buffering is supported on. "nInfo" is the length of the array.
-
-"frameBuffer" is array of length 2. The contents of the array element
-is ddx-specific. The content of frameBuffer[0] should, when placed in
-the window private, indicate that framebuffer 0 should be drawn into.
-The contents of frameBuffer[1], when placed into the window private,
-should indicate that framebuffer 1 should be drawn into.
-
-"selectPlane" is ddx-specific. It should contain information
-neccessary for your displayProc to access the select plane.
-It is passed to DrawSelectPlaneFunc.
-
-"CopyBufferBitsFunc" is a ddx-specific function that copies from one
-buffer of a multibuffered window to another buffer. If the CopyBufferBitsFunc
-is NULL, a default function will be used that calls pScreen->CopyArea.
-
-    void CopyBufferBitsFunc(pMBWindow, srcBufferNum, dstBufferNum)
-        mbufWindowPtr pMBWindow;
-        int srcBufferNum, dstBufferNum;
-
-"DrawSelectPlaneFunc" is a ddx-specific function that fills the
-regions "prgn" of select plane with the value "bufferNum". If 
-selectPlane is a DrawablePtr (such as a PixmapPtr), you can pass
-NULL for DrawSelectPlaneFunc, a default function will be used that
-calls FillRectangle on the selectPlane.
-
-    void DrawSelectPlaneFunc(pScreen, selectPlane, prgn, bufferNum)
-        ScreenPtr	pScreen;
-        DevUnion	selectPlane;
-        RegionPtr	prgn;
-        long		bufferNum;
-
-...
-...
-...
-
-*/
-
-#define MAX_BUFFERS  2	/* Only supports 2 buffers */
-#define FRONT_BUFFER 0
-#define BACK_BUFFER  1
-
-
-/* Buffer drawables have the same structure as window drawables */
-typedef WindowRec BufferRec;
-typedef WindowPtr BufferPtr;
-
-
-/*
- * Call RegisterHdwrBuffer for every screen that has doublebuffer hardware. 
- */
-
-static int		bufNumInfo[MAXSCREENS];
-static xMbufBufferInfo	*bufInfo[MAXSCREENS];
-static DevUnion		*bufFrameBuffer[MAXSCREENS];
-static DevUnion		bufselectPlane[MAXSCREENS];
-static void		(* bufCopyBufferBitsFunc[MAXSCREENS])();
-static void		(* bufDrawSelectPlaneFunc[MAXSCREENS])();
-
-static Bool bufMultibufferInit();
-
-
-void
-RegisterDoubleBufferHardware(pScreen, nInfo, pInfo, frameBuffer, selectPlane,
-			     CopyBufferBitsFunc, DrawSelectPlaneFunc)
-    ScreenPtr		pScreen;
-    int			nInfo;
-    xMbufBufferInfo	*pInfo;
-    DevUnion		*frameBuffer;
-    DevUnion		selectPlane;
-    void		(* CopyBufferBitsFunc)();
-    void		(* DrawSelectPlaneFunc)();
-{
-    bufNumInfo[pScreen->myNum]     = nInfo;
-    bufInfo[pScreen->myNum]        = pInfo;
-    bufFrameBuffer[pScreen->myNum] = frameBuffer;
-    bufselectPlane[pScreen->myNum] = selectPlane;
-
-    bufCopyBufferBitsFunc[pScreen->myNum]  = CopyBufferBitsFunc;
-    bufDrawSelectPlaneFunc[pScreen->myNum] = DrawSelectPlaneFunc;
-
-    /* Register ourselves with device-independent multibuffers code */
-    RegisterMultibufferInit(pScreen, bufMultibufferInit);
-}
-
-
-/*
- * Called by Multibuffer extension initialization.
- * Initializes mbufScreenRec and its devPrivate.
- */
-    
-static Bool NoopDDA_True() { return TRUE; }
-static Bool bufPositionWindow();
-static int  bufCreateImageBuffers();
-static void bufDestroyImageBuffers();
-static void bufDisplayImageBuffers();
-static void bufClearImageBufferArea();
-static void bufDestroyBuffer();
-static void bufCopyBufferBits();
-static void bufDrawSelectPlane();
-static void bufWrapScreenFuncs();
-static void bufResetProc();
-
-static void bufPostValidateTree();
-static void bufClipNotify();
-static void bufWindowExposures();
-static Bool bufChangeWindowAttributes();
-static void bufClearToBackground();
-static void bufCopyWindow();
-
-static Bool
-bufMultibufferInit(pScreen, pMBScreen)
-    ScreenPtr pScreen;
-    mbufScreenPtr pMBScreen;
-{
-    mbufBufferPrivPtr	pMBPriv;
-    BoxRec		box;
-
-    /* Multibuffer info */
-    pMBScreen->nInfo = bufNumInfo[pScreen->myNum];
-    pMBScreen->pInfo = bufInfo[pScreen->myNum];
-
-    /* Hooks */
-    pMBScreen->CreateImageBuffers = bufCreateImageBuffers;
-    pMBScreen->DestroyImageBuffers = bufDestroyImageBuffers;
-    pMBScreen->DisplayImageBuffers = bufDisplayImageBuffers;
-    pMBScreen->ClearImageBufferArea = bufClearImageBufferArea;
-    pMBScreen->ChangeMBufferAttributes = NoopDDA_True;
-    pMBScreen->ChangeBufferAttributes = NoopDDA_True;
-    pMBScreen->DeleteBufferDrawable = bufDestroyBuffer;
-    pMBScreen->WrapScreenFuncs = bufWrapScreenFuncs;
-    pMBScreen->ResetProc = bufResetProc;
-    /* Create devPrivate part */
-    pMBPriv = xalloc(sizeof *pMBPriv);
-    if (!pMBPriv)
-	return (FALSE);
-
-    pMBScreen->devPrivate.ptr = (pointer) pMBPriv;
-    pMBPriv->frameBuffer  = bufFrameBuffer[pScreen->myNum];
-    pMBPriv->selectPlane = bufselectPlane[pScreen->myNum];
-
-    /*
-     * Initializing the subtractRgn to the screen area will ensure that
-     * the selectPlane will get cleared on the first PostValidateTree.
-     */
-
-    box.x1 = 0;
-    box.y1 = 0;
-    box.x2 = pScreen->width;
-    box.y2 = pScreen->height;
-
-    pMBPriv->rgnChanged = TRUE;
-    REGION_INIT(pScreen, &pMBPriv->backBuffer, &box, 1);
-    REGION_INIT(pScreen, &pMBPriv->subtractRgn, &box, 1);
-    REGION_NULL(pScreen, &pMBPriv->unionRgn);
-
-    /* Misc functions */
-    pMBPriv->CopyBufferBits  = bufCopyBufferBitsFunc[pScreen->myNum];
-    pMBPriv->DrawSelectPlane = bufDrawSelectPlaneFunc[pScreen->myNum];
-
-    if (!pMBPriv->CopyBufferBits)
-	pMBPriv->CopyBufferBits = bufCopyBufferBits;
-
-    if (!pMBPriv->DrawSelectPlane)
-	pMBPriv->DrawSelectPlane = bufDrawSelectPlane;
-
-    /* screen functions */
-    pMBPriv->funcsWrapped = 0;
-    pMBPriv->inClearToBackground = FALSE;
-    pMBPriv->WindowExposures = NULL;
-    pMBPriv->CopyWindow = NULL;
-    pMBPriv->ClearToBackground = NULL;
-    pMBPriv->ClipNotify = NULL;
-    pMBPriv->ChangeWindowAttributes = NULL;
-
-    /* Start out wrapped to clear select plane */
-    WRAP_SCREEN_FUNC(pScreen,pMBPriv,PostValidateTree, bufPostValidateTree);
-    return TRUE;
-}
-
-static void
-UpdateBufferFromWindow(pBuffer, pWin)
-    BufferPtr	pBuffer;
-    WindowPtr	pWin;
-{
-    pBuffer->drawable.x      = pWin->drawable.x;
-    pBuffer->drawable.y      = pWin->drawable.y;
-    pBuffer->drawable.width  = pWin->drawable.width;
-    pBuffer->drawable.height = pWin->drawable.height;
-
-    pBuffer->drawable.serialNumber = NEXT_SERIAL_NUMBER;
-
-    /* Update for PaintWindowBackground */
-    pBuffer->parent = pWin->parent;
-
-    /*
-     * Make the borderClip the same as the clipList so
-     * NotClippedByChildren comes out with just clipList.
-     */
-
-    pBuffer->clipList   = pWin->clipList;
-    pBuffer->borderClip = pWin->clipList;
-    pBuffer->winSize    = pWin->winSize;
-    pBuffer->borderSize = pWin->borderSize;
-
-    pBuffer->origin = pWin->origin;
-}
-
-static BufferPtr
-bufCreateBuffer(pScreen, pWin, bufferNum)
-    ScreenPtr	pScreen;
-    WindowPtr	pWin;
-    int		bufferNum;
-{
-    mbufBufferPrivPtr	pMBPriv;
-    DevUnion	*devPrivates;
-    BufferPtr	pBuffer;
-    int		i;
-
-    pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-
-    pBuffer = AllocateWindow(pWin->drawable.pScreen);
-    if (!pBuffer)
-	return (NULL);
-
-    /* XXX- Until we know what is needed, copy everything. */
-    devPrivates = pBuffer->devPrivates;
-    *pBuffer = *pWin;
-    pBuffer->devPrivates   = devPrivates;
-
-    pBuffer->drawable.type = DRAWABLE_BUFFER;
-    pBuffer->drawable.serialNumber = NEXT_SERIAL_NUMBER;
-
-    pBuffer->nextSib    = NULL;
-    pBuffer->prevSib    = NULL;
-    pBuffer->firstChild = NULL;
-    pBuffer->lastChild  = NULL;
-
-    /* XXX - Need to call pScreen->CreateWindow for tile/stipples
-     *       or should I just copy the devPrivates?
-     */
-    
-    for (i=0; i < pScreen->WindowPrivateLen; i++)
-	pBuffer->devPrivates[i] = pWin->devPrivates[i];
-
-    pBuffer->devPrivates[frameWindowPrivateIndex] =
-	pMBPriv->frameBuffer[bufferNum];
-
-    return pBuffer;
-}
-
-static void
-bufDestroyBuffer(pDrawable)
-    DrawablePtr	pDrawable;
-{
-    xfree(pDrawable);
-}
-
-/*ARGSUSED*/
-static int
-bufCreateImageBuffers (pWin, nbuf, ids, action, hint)
-    WindowPtr	pWin;
-    int		nbuf;
-    XID		*ids;
-    int		action;
-    int		hint;
-{
-    ScreenPtr		pScreen;
-    mbufScreenPtr	pMBScreen;
-    mbufWindowPtr	pMBWindow;
-    mbufBufferPtr	pMBBuffer;
-    int			i;
-
-    pScreen   = pWin->drawable.pScreen;
-    pMBScreen = MB_SCREEN_PRIV(pScreen);
-    pMBWindow = MB_WINDOW_PRIV(pWin);
-
-    pMBWindow->devPrivate.ptr = (pointer) REGION_CREATE(pScreen, 0,0);
-    if (!pMBWindow->devPrivate.ptr)
-	return(0);
-    REGION_COPY(pScreen, (RegionPtr) pMBWindow->devPrivate.ptr,
-			    &pWin->clipList);
-
-    for (i = 0; i < nbuf; i++)
-    {
-	pMBBuffer = pMBWindow->buffers + i;
-	pMBBuffer->pDrawable = (DrawablePtr) bufCreateBuffer(pScreen,pWin,i);
-
-	if (!pMBBuffer->pDrawable)
-	    break;
-
-	if (!AddResource (ids[i], MultibufferDrawableResType,
-			  (pointer) pMBBuffer->pDrawable))
-	{
-	    bufDestroyBuffer((BufferPtr) pMBBuffer->pDrawable);
-	    break;
-	}
-	pMBBuffer->pDrawable->id = ids[i];
-
-	/*
-	 * If window is already mapped, generate exposures and
-	 * clear the area of the newly buffers.
-	 */
-
-	if ((pWin->realized) && (i != pMBWindow->displayedMultibuffer))
-	    (* pMBScreen->ClearImageBufferArea)(pMBBuffer, 0,0, 0,0, TRUE);
-    }
-
-    return i;
-}
-
-static void
-bufDestroyImageBuffers(pWin)
-    WindowPtr	pWin;
-{
-    ScreenPtr		pScreen;
-    mbufWindowPtr	pMBWindow;
-
-    pScreen   = pWin->drawable.pScreen;
-
-    if (pMBWindow = MB_WINDOW_PRIV(pWin))
-    {
-	mbufBufferPrivPtr pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-
-	/*
-	 * if the backbuffer is currently being displayed, move the bits
-	 * to the frontbuffer and display it instead.
-	 */
-
-	if (pWin->realized && (pMBWindow->displayedMultibuffer == BACK_BUFFER))
-	{
-	    (* pMBPriv->CopyBufferBits)(pMBWindow, BACK_BUFFER, FRONT_BUFFER);
-	    REGION_SUBTRACT(pScreen, &pMBPriv->backBuffer,
-				  &pMBPriv->backBuffer, &pWin->clipList);
-	    (* pMBPriv->DrawSelectPlane)(pScreen, pMBPriv->selectPlane,
-			    &pWin->clipList, FRONT_BUFFER);
-	}
-
-	/* Switch window rendering to front buffer */
-	pWin->devPrivates[frameWindowPrivateIndex] =
-	    pMBPriv->frameBuffer[FRONT_BUFFER];
-
-	REGION_DESTROY(pScreen, (RegionPtr) pMBWindow->devPrivate.ptr);
-	pMBWindow->devPrivate.ptr = NULL;
-    }
-}
-
-/*
- * Can be replaced by pScreen->ClearToBackground if pBuffer->eventMask
- * and wOtherEventsMasks(pBuffer) were setup.
- */
-
-static void
-bufClearImageBufferArea(pMBBuffer, x,y, w,h, generateExposures)
-    mbufBufferPtr	pMBBuffer;
-    short		x,y;
-    unsigned short	w,h;
-    Bool		generateExposures;
-{
-    BoxRec box;
-    RegionRec	reg;
-    RegionPtr pBSReg = NullRegion;
-    ScreenPtr	pScreen;
-    BoxPtr  extents;
-    int	    x1, y1, x2, y2;
-    BufferPtr pBuffer;
-
-    pBuffer = (BufferPtr) pMBBuffer->pDrawable;
-    /* compute everything using ints to avoid overflow */
-
-    x1 = pBuffer->drawable.x + x;
-    y1 = pBuffer->drawable.y + y;
-    if (w)
-        x2 = x1 + (int) w;
-    else
-        x2 = x1 + (int) pBuffer->drawable.width - (int) x;
-    if (h)
-        y2 = y1 + h;	
-    else
-        y2 = y1 + (int) pBuffer->drawable.height - (int) y;
-
-    extents = &pBuffer->clipList.extents;
-    
-    /* clip the resulting rectangle to the window clipList extents.  This
-     * makes sure that the result will fit in a box, given that the
-     * screen is < 32768 on a side.
-     */
-
-    if (x1 < extents->x1)
-	x1 = extents->x1;
-    if (x2 > extents->x2)
-	x2 = extents->x2;
-    if (y1 < extents->y1)
-	y1 = extents->y1;
-    if (y2 > extents->y2)
-	y2 = extents->y2;
-
-    if (x2 <= x1 || y2 <= y1)
-    {
-	x2 = x1 = 0;
-	y2 = y1 = 0;
-    }
-
-    box.x1 = x1;
-    box.x2 = x2;
-    box.y1 = y1;
-    box.y2 = y2;
-
-    pScreen = pBuffer->drawable.pScreen;
-    REGION_INIT(pScreen, &reg, &box, 1);
-
-    REGION_INTERSECT(pScreen, &reg, &reg, &pBuffer->clipList);
-    if (pBuffer->backgroundState != None)
-	miPaintWindow(pBuffer, &reg, PW_BACKGROUND);
-    if (generateExposures)
-	MultibufferExpose(pMBBuffer, &reg);
-#ifdef _notdef
-    /* XXBS - This is the original miClearToBackground code.
-     * WindowExposures needs to be called (or the functionality emulated)
-     * in order for backingStore to work, but first, pBuffer->eventMask
-     * and wOtherEventsMasks(pBuffer) need to be setup correctly.
-     */
-
-    if (generateExposures)
-	(*pScreen->WindowExposures)(pBuffer, &reg, pBSReg);
-    else if (pBuffer->backgroundState != None)
-        miPaintWindow(pBuffer, &reg, PW_BACKGROUND);
-#endif
-    REGION_UNINIT(pScreen, &reg);
-    if (pBSReg)
-	REGION_DESTROY(pScreen, pBSReg);
-}
-
-static void
-bufWrapScreenFuncs(pScreen)
-    ScreenPtr pScreen;
-{
-    mbufBufferPrivPtr pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-
-    WRAP_SCREEN_FUNC(pScreen,pMBPriv,PostValidateTree, bufPostValidateTree);
-    WRAP_SCREEN_FUNC(pScreen,pMBPriv,ClipNotify, bufClipNotify);
-    WRAP_SCREEN_FUNC(pScreen,pMBPriv,WindowExposures,bufWindowExposures);
-    WRAP_SCREEN_FUNC(pScreen,pMBPriv,ChangeWindowAttributes, bufChangeWindowAttributes);
-    WRAP_SCREEN_FUNC(pScreen,pMBPriv,ClearToBackground,bufClearToBackground);
-    WRAP_SCREEN_FUNC(pScreen,pMBPriv,CopyWindow,bufCopyWindow);
-}
-
-static void
-bufResetProc(pScreen)
-    ScreenPtr pScreen;
-{
-    mbufBufferPrivPtr pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-
-    /*
-     * frameBuffer, selectPlane, and pInfo should be freed by
-     * whoever called RegisterDoubleBufferHardware
-     */
-
-    REGION_UNINIT(pScreen, &pMBPriv->backBuffer);
-    REGION_UNINIT(pScreen, &pMBPriv->subtractRgn);
-    REGION_UNINIT(pScreen, &pMBPriv->unionRgn);
-    xfree(pMBPriv);
-}
-
-/*---------------------------------------------------------------------------*/
-
-/* 
- * Used if CopyBufferBitsFunc is not provided when registering.
- * This should work for everybody since CopyArea needs to support
- * copying between buffers anyway.
- */
-
-static void
-bufCopyBufferBits(pMBWindow, srcBufferNum, dstBufferNum)
-    mbufWindowPtr pMBWindow;
-    int srcBufferNum, dstBufferNum;
-{
-    DrawablePtr pSrcBuffer, pDstBuffer;
-    GCPtr pGC;
-
-    pSrcBuffer = pMBWindow->buffers[srcBufferNum].pDrawable;
-    pDstBuffer = pMBWindow->buffers[dstBufferNum].pDrawable;
-
-    pGC = GetScratchGC (pDstBuffer->depth, pDstBuffer->pScreen);
-    if (!pGC)
-	return;
-
-    ValidateGC (pDstBuffer, pGC);
-    (* pGC->ops->CopyArea) (pSrcBuffer, pDstBuffer, pGC,
-		    0,0, pDstBuffer->width, pDstBuffer->height, 0,0);
-    FreeScratchGC (pGC);
-}
-
-/*
- * Used if DrawSelectPlanFunc is not provided for when registering.
- * However, it only works if selectPlane.ptr is a drawable. Also
- * assumes that painting with color 0 selects the front buffer,
- * while color 1 selects the back buffer.
- */
-
-static void
-bufDrawSelectPlane(pScreen, selectPlane, prgn, bufferNum)
-    ScreenPtr	pScreen;
-    DevUnion	selectPlane;
-    RegionPtr	prgn;
-    long	bufferNum;
-{
-    DrawablePtr pDrawable;
-    GCPtr pGC;
-    int i;
-    BoxPtr pbox;
-    xRectangle *prect;
-    int numRects;
-    XID	value;
-
-    if (REGION_NUM_RECTS(prgn) == 0)
-	return;
-
-    pDrawable = (DrawablePtr) selectPlane.ptr;
-    pGC = GetScratchGC (pDrawable->depth, pScreen);
-    if (!pGC)
-	return;
-
-    prect = xalloc(REGION_NUM_RECTS(prgn) * sizeof(xRectangle));
-    if (!prect)
-    {
-	FreeScratchGC(pGC);
-	return;
-    }
-
-    value = (XID) bufferNum;
-    DoChangeGC(pGC, GCForeground, &value, 0);
-    ValidateGC(pDrawable, pGC);
-
-    numRects = REGION_NUM_RECTS(prgn);
-    pbox = REGION_RECTS(prgn);
-    for (i= numRects; --i >= 0; pbox++, prect++)
-    {
-	prect->x = pbox->x1;
-	prect->y = pbox->y1;
-	prect->width = pbox->x2 - pbox->x1;
-	prect->height = pbox->y2 - pbox->y1;
-    }
-    prect -= numRects;
-    (* pGC->ops->PolyFillRect)(pDrawable, pGC, numRects, prect);
-
-    xfree(prect);
-    FreeScratchGC (pGC);
-}
-
-
-static void
-bufDisplayImageBuffers(pScreen, ppMBWindow, ppMBBuffer, nbuf)
-    ScreenPtr		pScreen;
-    mbufBufferPtr	*ppMBBuffer;
-    mbufWindowPtr	*ppMBWindow;
-    int			nbuf;
-{
-    WindowPtr       pWin;
-    BufferPtr	    pPrevBuffer, pNewBuffer;
-    int		    i, number;
-    mbufBufferPrivPtr pMBPriv;
-    mbufBufferPtr   pPrevMBBuffer;
-
-    pMBPriv   = MB_SCREEN_PRIV_BUFFER(pScreen);
-
-    for (i = 0; i < nbuf; i++)
-    {
-	number = ppMBBuffer[i]->number; /* 0=frontbuffer, 1=backbuffer */
-	pWin = ppMBWindow[i]->pWindow;
-	pPrevMBBuffer = MB_DISPLAYED_BUFFER(ppMBWindow[i]);
-
-	pPrevBuffer = (BufferPtr) pPrevMBBuffer->pDrawable;
-	pNewBuffer  = (BufferPtr) ppMBBuffer[i]->pDrawable;
-
-	if (pPrevBuffer != pNewBuffer)
-	{
-	    RegionPtr backBuffer = &pMBPriv->backBuffer;
-
-	    /*
-	     * Update the select plane and the backBuffer region.
-	     */
-
-	    (* pMBPriv->DrawSelectPlane)(pScreen, pMBPriv->selectPlane,
-			    &pWin->clipList, number);
-
-	    if (number == BACK_BUFFER)
-		REGION_UNION(pScreen, backBuffer, backBuffer,
-				   &pWin->clipList);
-	    else
-		REGION_SUBTRACT(pScreen, backBuffer, backBuffer,
-				   &pWin->clipList);
-
-	    /* Switch which framebuffer the window draws into */
-	    pWin->devPrivates[frameWindowPrivateIndex] =
-		pMBPriv->frameBuffer[number];
-	}
-
-	switch (ppMBWindow[i]->updateAction)
-	{
-	case MultibufferUpdateActionUndefined:
-	    break;
-	case MultibufferUpdateActionBackground:
-	    (* MB_SCREEN_PRIV(pScreen)->ClearImageBufferArea)
-		(pPrevMBBuffer, 0,0, 0,0, FALSE);
-	    break;
-	case MultibufferUpdateActionUntouched:
-	    break;
-	case MultibufferUpdateActionCopied:
-	    if (pPrevBuffer != pNewBuffer)
-	    {
-		(* pMBPriv->CopyBufferBits) (ppMBWindow[i],
-			ppMBBuffer[i]->number, pPrevMBBuffer->number);
-	    }
-	    break;
-	}
-    }
-}
-
-/* Updates the backBuffer region and paints the selectPlane. */
-
-static void
-bufPostValidateTree(pParent, pChild, kind)
-    WindowPtr	pParent, pChild;
-    VTKind	kind;
-{
-    ScreenPtr pScreen;
-    mbufBufferPrivPtr pMBPriv;
-
-    if (pParent)
-	pScreen = pParent->drawable.pScreen;
-    else if (pChild)
-	pScreen = pChild->drawable.pScreen;
-    else
-	return; /* Hopeless */
-
-    pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-
-    UNWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, PostValidateTree);
-    if (pScreen->PostValidateTree)
-	(* pScreen->PostValidateTree)(pParent, pChild, kind);
-    REWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, PostValidateTree);
-
-    /* Does backBuffer need to change? */
-    if (pMBPriv->rgnChanged)
-    {
-	RegionRec exposed;
-	RegionPtr pSubtractRgn, pUnionRgn;
-	Bool overlap;
-
-	pMBPriv->rgnChanged = FALSE;
-
-	pSubtractRgn = &pMBPriv->subtractRgn;
-	pUnionRgn    = &pMBPriv->unionRgn;
-	REGION_VALIDATE(pScreen, pSubtractRgn, &overlap);
-#ifdef DEBUG
-	if (overlap)
-	    FatalError("bufPostValidateTree: subtractRgn overlaps");
-#endif
-	REGION_VALIDATE(pScreen, pUnionRgn, &overlap);
-#ifdef DEBUG
-	if (overlap)
-	    FatalError("bufPostValidateTree: unionRgn overlaps");
-#endif
-
-	/* Update backBuffer: subtract must come before union */
-	REGION_SUBTRACT(pScreen, &pMBPriv->backBuffer, &pMBPriv->backBuffer,
-			      pSubtractRgn);
-	REGION_UNION(pScreen, &pMBPriv->backBuffer, &pMBPriv->backBuffer,
-			      pUnionRgn);
-
-	/* Paint gained and lost backbuffer areas in select plane */
-	REGION_NULL(pScreen, &exposed);
-	REGION_SUBTRACT(pScreen, &exposed, pSubtractRgn, pUnionRgn);
-	(* pMBPriv->DrawSelectPlane)(pScreen, pMBPriv->selectPlane,
-				     &exposed, FRONT_BUFFER);
-
-	REGION_SUBTRACT(pScreen, &exposed, pUnionRgn, pSubtractRgn);
-	(* pMBPriv->DrawSelectPlane)(pScreen, pMBPriv->selectPlane,
-				    &exposed, BACK_BUFFER);
-	
-	REGION_UNINIT(pScreen, &exposed);
-	REGION_EMPTY(pScreen, pSubtractRgn);
-	REGION_EMPTY(pScreen, pUnionRgn);
-    }
-}
-
-/*
- * If the window is multibuffered and displaying the backbuffer,
- * add the old clipList to the subtractRgn and add the new clipList
- * to the unionRgn. PostValidateTree will use subtractRgn and unionRgn
- * to update the backBuffer region and the selectPlane.
- *
- * Copy changes to the window structure into the buffers.
- * Send ClobberNotify events.
- */
-
-static void
-bufClipNotify(pWin, dx,dy)
-    WindowPtr pWin;
-    int       dx,dy;
-{
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    mbufBufferPrivPtr pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-    mbufWindowPtr	pMBWindow;
-    int i;
-
-    UNWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, ClipNotify);
-    if (pScreen->ClipNotify)
-	(* pScreen->ClipNotify)(pWin, dx,dy);
-    REWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, ClipNotify);
-
-    if (pMBWindow = MB_WINDOW_PRIV(pWin))
-    {
-	RegionPtr pOldClipList = (RegionPtr) pMBWindow->devPrivate.ptr;
-
-	if (! REGION_EQUAL(pScreen, pOldClipList, &pWin->clipList))
-	{
-	    if (pMBWindow->displayedMultibuffer == BACK_BUFFER)
-	    {
-		pMBPriv->rgnChanged = TRUE;
-		REGION_APPEND(pScreen, &pMBPriv->subtractRgn, pOldClipList);
-		REGION_APPEND(pScreen, &pMBPriv->unionRgn, &pWin->clipList);
-	    }
-
-	    REGION_COPY(pScreen, pOldClipList,&pWin->clipList);
-	}
-
-	/* Update buffer x,y,w,h, and clipList */
-	for (i=0; i<pMBWindow->numMultibuffer; i++)
-	{
-	    mbufBufferPtr pMBBuffer = pMBWindow->buffers + i;
-	    if (pMBBuffer->clobber != pWin->visibility)
-	    {
-		pMBBuffer->clobber = pWin->visibility;
-		MultibufferClobber(pMBBuffer);
-	    }
-	    UpdateBufferFromWindow(pMBBuffer->pDrawable, pWin);
-	}
-    }
-}
-
-/*
- * Updates buffer's background fields when the window's changes.
- * This is necessary because miPaintWindow is used to paint the buffer.
- *
- * XXBS - Backingstore state will have be tracked too if it is supported.
- */
-
-static Bool
-bufChangeWindowAttributes(pWin, mask)
-    WindowPtr pWin;
-    unsigned long mask;
-{
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    mbufBufferPrivPtr pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-    mbufWindowPtr pMBWindow;
-    Bool ret;
-
-    UNWRAP_SCREEN_FUNC(pScreen, pMBPriv, Bool, ChangeWindowAttributes);
-    ret = (* pScreen->ChangeWindowAttributes)(pWin, mask);
-    REWRAP_SCREEN_FUNC(pScreen, pMBPriv, Bool, ChangeWindowAttributes);
-
-    if (pMBWindow = MB_WINDOW_PRIV(pWin))
-    {
-	if (mask & (CWBackPixmap | CWBackPixel))
-	{
-	    BufferPtr pBuffer;
-	    int i;
-
-	    for (i=0; i<pMBWindow->displayedMultibuffer; i++)
-	    {
-		pBuffer = (BufferPtr) pMBWindow->buffers[i].pDrawable;
-		pBuffer->backgroundState = pWin->backgroundState;
-		pBuffer->background = pWin->background;
-	    }
-	}
-    }
-    return ret;
-}
-
-/*
- * Send exposures and clear the background for a buffer whenever
- * its corresponding window is exposed, except when called by
- * ClearToBackground.
- */
-
-static void 
-bufWindowExposures(pWin, prgn, other_exposed)
-    WindowPtr pWin;
-    RegionPtr prgn, other_exposed;
-{
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    mbufWindowPtr pMBWindow = MB_WINDOW_PRIV(pWin);
-    mbufBufferPrivPtr pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-    RegionRec tmp_rgn;
-    int i;
-    Bool handleBuffers;
-
-    handleBuffers = (!pMBPriv->inClearToBackground) &&
-	(pWin->drawable.type == DRAWABLE_WINDOW) &&
-	pMBWindow && (prgn && !REGION_NIL(prgn));
-
-    /* miWindowExposures munges prgn and other_exposed. */
-    if (handleBuffers)
-    {
-	REGION_NULL(pScreen, &tmp_rgn);
-	REGION_COPY(pScreen, &tmp_rgn, prgn);
-    }
-
-    UNWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, WindowExposures);
-    (* pScreen->WindowExposures) (pWin, prgn, other_exposed);
-    REWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, WindowExposures);
-
-    if (!handleBuffers)
-	return;
-
-    /*
-     * Send expose events to all clients. Paint the exposed region for all
-     * buffers except the displayed buffer since it is handled when the
-     * window is painted.
-     *
-     * XXBS - Will have to be re-written to handle BackingStore on buffers.
-     */
-
-    for (i=0; i<pMBWindow->numMultibuffer; i++)
-    {
-	mbufBufferPtr pMBBuffer;
-	BufferPtr pBuffer;
-
-	pMBBuffer = pMBWindow->buffers + i;
-	pBuffer = (BufferPtr) pMBBuffer->pDrawable;
-
-	if (i != pMBWindow->displayedMultibuffer)
-	    miPaintWindow(pBuffer, &tmp_rgn, PW_BACKGROUND);
-	if ((pMBBuffer->otherEventMask | pMBBuffer->eventMask) & ExposureMask)
-	    MultibufferExpose(pMBBuffer, &tmp_rgn);
-    }
-
-    REGION_UNINIT(pScreen, &tmp_rgn);
-}
-
-/*
- * Set ``inClearToBackground'' so that WindowExposures does not attempt
- * to send expose events or clear the background on the buffers.
- */
-
-static void
-bufClearToBackground(pWin, x,y,w,h, sendExpose)
-    WindowPtr pWin;
-    int x,y, w,h;
-    Bool sendExpose;
-{
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    mbufBufferPrivPtr pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-
-    pMBPriv->inClearToBackground = TRUE;
-
-    UNWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, ClearToBackground);
-    (* pScreen->ClearToBackground)(pWin, x,y,w,h, sendExpose);
-    REWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, ClearToBackground);
-
-    pMBPriv->inClearToBackground = FALSE;
-}
-
-/*
- * Move bits in both buffers. It does this by calling pScreen->CopyWindow
- * twice, once with the root window's devPrivate[frameWindowPrivateIndex]
- * pointing to the frontbuffer pixmap and once with it pointed to the
- * backbuffer pixmap. It does this if there are *any* existing multibuffered
- * window... a possible optimization is to copy the backbuffer only if this
- * window or its inferiors are multibuffered. May be faster, maybe not.
- *
- * XXX - Only works if your CopyWindow checks the root window's devPrivate
- *       to see which buffer to draw into. Works for cfbPaintWindow.
- */
-
-/*ARGSUSED*/
-static void 
-bufCopyWindow(pWin, ptOldOrg, prgnSrc)
-    WindowPtr pWin;
-    DDXPointRec ptOldOrg;
-    RegionPtr prgnSrc;
-{
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    mbufBufferPrivPtr pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-    WindowPtr pwinroot;
-    DevUnion save;
-
-    UNWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, CopyWindow);
-
-    pwinroot = WindowTable[pScreen->myNum];
-    save = pwinroot->devPrivates[frameWindowPrivateIndex];
-
-    /*
-     * Copy front buffer
-     */
-
-    pwinroot->devPrivates[frameWindowPrivateIndex] =
-	pMBPriv->frameBuffer[FRONT_BUFFER];
-    (* pScreen->CopyWindow)(pWin, ptOldOrg, prgnSrc);
-
-    /*
-     * Copy back buffer
-     */
-
-    /* CopyWindow translates prgnSrc... translate it back for 2nd call. */
-    REGION_TRANSLATE(pScreen, prgnSrc,
-				  ptOldOrg.x - pWin->drawable.x,
-				  ptOldOrg.y - pWin->drawable.y);
-    pwinroot->devPrivates[frameWindowPrivateIndex] =
-	pMBPriv->frameBuffer[BACK_BUFFER];
-    (* pScreen->CopyWindow)(pWin, ptOldOrg, prgnSrc);
-
-    pwinroot->devPrivates[frameWindowPrivateIndex] = save;
-    REWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, CopyWindow);
-}