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diff --git a/Xext/mbufbf.c b/Xext/mbufbf.c
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-/*
-
-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);
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 20:18:37 +0000