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Diffstat (limited to 'Xext/mbufbf.c')
| -rw-r--r-- | Xext/mbufbf.c | 1007 |
1 files changed, 0 insertions, 1007 deletions
diff --git a/Xext/mbufbf.c b/Xext/mbufbf.c deleted file mode 100644 index 7d9d60a4f..000000000 --- a/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, ®, &box, 1); - - REGION_INTERSECT(pScreen, ®, ®, &pBuffer->clipList); - if (pBuffer->backgroundState != None) - miPaintWindow(pBuffer, ®, PW_BACKGROUND); - if (generateExposures) - MultibufferExpose(pMBBuffer, ®); -#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, ®, pBSReg); - else if (pBuffer->backgroundState != None) - miPaintWindow(pBuffer, ®, PW_BACKGROUND); -#endif - REGION_UNINIT(pScreen, ®); - 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); -} |