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Diffstat (limited to 'dbe/midbe.c')
| -rw-r--r-- | dbe/midbe.c | 848 |
1 files changed, 848 insertions, 0 deletions
diff --git a/dbe/midbe.c b/dbe/midbe.c new file mode 100644 index 000000000..5f6a48b32 --- /dev/null +++ b/dbe/midbe.c @@ -0,0 +1,848 @@ +/* $Xorg: midbe.c,v 1.3 2000/08/17 19:48:16 cpqbld Exp $ */ +/****************************************************************************** + * + * Copyright (c) 1994, 1995 Hewlett-Packard Company + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * 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 HEWLETT-PACKARD COMPANY 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 Hewlett-Packard + * Company 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 Hewlett-Packard Company. + * + * Machine-independent DBE code + * + *****************************************************************************/ + + +/* INCLUDES */ + +#define NEED_REPLIES +#define NEED_EVENTS +#include <stdio.h> +#include "X.h" +#include "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 "dbestruct.h" +#include "midbestr.h" +#include "regionstr.h" +#include "gcstruct.h" +#include "inputstr.h" + + +/* DEFINES */ + + +/* TYPEDEFS */ + + +/* GLOBALS */ + +static int miDbePrivPrivGeneration = 0; +static int miDbeWindowPrivPrivIndex = -1; +static int miDbeScreenPrivPrivIndex = -1; +RESTYPE dbeDrawableResType; +RESTYPE dbeWindowPrivResType; +int dbeScreenPrivIndex = -1; +int dbeWindowPrivIndex = -1; + + + +/****************************************************************************** + * + * DBE MI Procedure: miDbeGetVisualInfo + * + * Description: + * + * This is the MI function for the DbeGetVisualInfo request. This function + * is called through pDbeScreenPriv->GetVisualInfo. This function is also + * called for the DbeAllocateBackBufferName request at the extension level; + * it is called by ProcDbeAllocateBackBufferName() in dbe.c. + * + * If memory allocation fails or we can not get the visual info, this + * function returns FALSE. Otherwise, it returns TRUE for success. + * + *****************************************************************************/ + +static Bool +miDbeGetVisualInfo(pScreen, pScrVisInfo) + ScreenPtr pScreen; + XdbeScreenVisualInfo *pScrVisInfo; +{ + register int i, j, k; + register int count; + DepthPtr pDepth; + XdbeVisualInfo *visInfo; + + + /* Determine number of visuals for this screen. */ + for (i = 0, count = 0; i < pScreen->numDepths; i++) + { + count += pScreen->allowedDepths[i].numVids; + } + + /* Allocate an array of XdbeVisualInfo items. */ + if (!(visInfo = (XdbeVisualInfo *)xalloc(count * sizeof(XdbeVisualInfo)))) + { + return(FALSE); /* memory alloc failure */ + } + + for (i = 0, k = 0; i < pScreen->numDepths; i++) + { + /* For each depth of this screen, get visual information. */ + + pDepth = &pScreen->allowedDepths[i]; + + for (j = 0; j < pDepth->numVids; j++) + { + /* For each visual for this depth of this screen, get visual ID + * and visual depth. Since this is MI code, we will always return + * the same performance level for all visuals (0). A higher + * performance level value indicates higher performance. + */ + visInfo[k].visual = pDepth->vids[j]; + visInfo[k].depth = pDepth->depth; + visInfo[k].perflevel = 0; + k++; + } + } + + /* Record the number of visuals and point visual_depth to + * the array of visual info. + */ + pScrVisInfo->count = count; + pScrVisInfo->visinfo = visInfo; + + return(TRUE); /* success */ + +} /* miDbeGetVisualInfo() */ + + +/****************************************************************************** + * + * DBE MI Procedure: miAllocBackBufferName + * + * Description: + * + * This is the MI function for the DbeAllocateBackBufferName request. + * + *****************************************************************************/ + +static int +miDbeAllocBackBufferName(pWin, bufId, swapAction) + WindowPtr pWin; + XID bufId; + int swapAction; +{ + ScreenPtr pScreen; + DbeWindowPrivPtr pDbeWindowPriv; + MiDbeWindowPrivPrivPtr pDbeWindowPrivPriv; + DbeScreenPrivPtr pDbeScreenPriv; + GCPtr pGC; + xRectangle clearRect; + + + pScreen = pWin->drawable.pScreen; + pDbeWindowPriv = DBE_WINDOW_PRIV(pWin); + + if (pDbeWindowPriv->nBufferIDs == 0) + { + /* There is no buffer associated with the window. + * We have to create the window priv priv. Remember, the window + * priv was created at the DIX level, so all we need to do is + * create the priv priv and attach it to the priv. + */ + + pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen); + + /* Setup the window priv priv. */ + pDbeWindowPrivPriv = MI_DBE_WINDOW_PRIV_PRIV(pDbeWindowPriv); + pDbeWindowPrivPriv->pDbeWindowPriv = pDbeWindowPriv; + + /* Get a front pixmap. */ + if (!(pDbeWindowPrivPriv->pFrontBuffer = + (*pScreen->CreatePixmap)(pScreen, pDbeWindowPriv->width, + pDbeWindowPriv->height, + pWin->drawable.depth))) + { + return(BadAlloc); + } + + /* Get a back pixmap. */ + if (!(pDbeWindowPrivPriv->pBackBuffer = + (*pScreen->CreatePixmap)(pScreen, pDbeWindowPriv->width, + pDbeWindowPriv->height, + pWin->drawable.depth))) + { + (*pScreen->DestroyPixmap)(pDbeWindowPrivPriv->pFrontBuffer); + return(BadAlloc); + } + + + /* Make the back pixmap a DBE drawable resource. */ + if (!AddResource(bufId, dbeDrawableResType, + (pointer)pDbeWindowPrivPriv->pBackBuffer)) + { + /* free the buffer and the drawable resource */ + FreeResource(bufId, RT_NONE); + return(BadAlloc); + } + + + /* Attach the priv priv to the priv. */ + pDbeWindowPriv->devPrivates[miDbeWindowPrivPrivIndex].ptr = + (pointer)pDbeWindowPrivPriv; + + + /* Clear the back buffer. */ + pGC = GetScratchGC(pWin->drawable.depth, pWin->drawable.pScreen); + if ((*pDbeScreenPriv->SetupBackgroundPainter)(pWin, pGC)) + { + ValidateGC((DrawablePtr)pDbeWindowPrivPriv->pBackBuffer, pGC); + clearRect.x = clearRect.y = 0; + clearRect.width = pDbeWindowPrivPriv->pBackBuffer->drawable.width; + clearRect.height = pDbeWindowPrivPriv->pBackBuffer->drawable.height; + (*pGC->ops->PolyFillRect)( + (DrawablePtr)pDbeWindowPrivPriv->pBackBuffer, pGC, 1, + &clearRect); + } + FreeScratchGC(pGC); + + } /* if no buffer associated with the window */ + + else + { + /* A buffer is already associated with the window. + * Place the new buffer ID information at the head of the ID list. + */ + + /* Associate the new ID with an existing pixmap. */ + pDbeWindowPrivPriv = MI_DBE_WINDOW_PRIV_PRIV(pDbeWindowPriv); + if (!AddResource(bufId, dbeDrawableResType, + (pointer)pDbeWindowPrivPriv->pBackBuffer)) + { + return(BadAlloc); + } + + } + + return(Success); + +} /* miDbeAllocBackBufferName() */ + + +/****************************************************************************** + * + * DBE MI Procedure: miDbeAliasBuffers + * + * Description: + * + * This function associates all XIDs of a buffer with the back pixmap + * stored in the window priv. + * + *****************************************************************************/ + +static void +miDbeAliasBuffers(pDbeWindowPriv) + DbeWindowPrivPtr pDbeWindowPriv; +{ + int i; + MiDbeWindowPrivPrivPtr pDbeWindowPrivPriv = + MI_DBE_WINDOW_PRIV_PRIV(pDbeWindowPriv); + + for (i = 0; i < pDbeWindowPriv->nBufferIDs; i++) + { + ChangeResourceValue(pDbeWindowPriv->IDs[i], dbeDrawableResType, + (pointer)pDbeWindowPrivPriv->pBackBuffer); + } + +} /* miDbeAliasBuffers() */ + + +/****************************************************************************** + * + * DBE MI Procedure: miDbeSwapBuffers + * + * Description: + * + * This is the MI function for the DbeSwapBuffers request. + * + *****************************************************************************/ + +static int +miDbeSwapBuffers(client, pNumWindows, swapInfo) + ClientPtr client; + int *pNumWindows; + DbeSwapInfoPtr swapInfo; +{ + DbeScreenPrivPtr pDbeScreenPriv; + GCPtr pGC; + WindowPtr pWin; + register int i; + MiDbeWindowPrivPrivPtr pDbeWindowPrivPriv; + PixmapPtr pTmpBuffer; + xRectangle clearRect; + + + pWin = swapInfo[0].pWindow; + pDbeScreenPriv = DBE_SCREEN_PRIV_FROM_WINDOW(pWin); + pDbeWindowPrivPriv = MI_DBE_WINDOW_PRIV_PRIV_FROM_WINDOW(pWin); + pGC = GetScratchGC(pWin->drawable.depth, pWin->drawable.pScreen); + + /* + ********************************************************************** + ** Setup before swap. + ********************************************************************** + */ + + switch(swapInfo[0].swapAction) + { + case XdbeUndefined: + break; + + case XdbeBackground: + break; + + case XdbeUntouched: + ValidateGC((DrawablePtr)pDbeWindowPrivPriv->pFrontBuffer, pGC); + (*pGC->ops->CopyArea)((DrawablePtr)pWin, + (DrawablePtr)pDbeWindowPrivPriv->pFrontBuffer, + pGC, 0, 0, pWin->drawable.width, + pWin->drawable.height, 0, 0); + break; + + case XdbeCopied: + break; + + } + + /* + ********************************************************************** + ** Swap. + ********************************************************************** + */ + + ValidateGC((DrawablePtr)pWin, pGC); + (*pGC->ops->CopyArea)((DrawablePtr)pDbeWindowPrivPriv->pBackBuffer, + (DrawablePtr)pWin, pGC, 0, 0, + pWin->drawable.width, pWin->drawable.height, + 0, 0); + + /* + ********************************************************************** + ** Tasks after swap. + ********************************************************************** + */ + + switch(swapInfo[0].swapAction) + { + case XdbeUndefined: + break; + + case XdbeBackground: + if ((*pDbeScreenPriv->SetupBackgroundPainter)(pWin, pGC)) + { + ValidateGC((DrawablePtr)pDbeWindowPrivPriv->pBackBuffer, pGC); + clearRect.x = 0; + clearRect.y = 0; + clearRect.width = + pDbeWindowPrivPriv->pBackBuffer->drawable.width; + clearRect.height = + pDbeWindowPrivPriv->pBackBuffer->drawable.height; + (*pGC->ops->PolyFillRect)( + (DrawablePtr)pDbeWindowPrivPriv->pBackBuffer, + pGC, 1, &clearRect); + } + break; + + case XdbeUntouched: + /* Swap pixmap pointers. */ + pTmpBuffer = pDbeWindowPrivPriv->pBackBuffer; + pDbeWindowPrivPriv->pBackBuffer = + pDbeWindowPrivPriv->pFrontBuffer; + pDbeWindowPrivPriv->pFrontBuffer = pTmpBuffer; + + miDbeAliasBuffers(pDbeWindowPrivPriv->pDbeWindowPriv); + + break; + + case XdbeCopied: + break; + + } + + /* Remove the swapped window from the swap information array and decrement + * pNumWindows to indicate to the DIX level how many windows were actually + * swapped. + */ + + if (*pNumWindows > 1) + { + /* We were told to swap more than one window, but we only swapped the + * first one. Remove the first window in the list by moving the last + * window to the beginning. + */ + swapInfo[0].pWindow = swapInfo[*pNumWindows - 1].pWindow; + swapInfo[0].swapAction = swapInfo[*pNumWindows - 1].swapAction; + + /* Clear the last window information just to be safe. */ + swapInfo[*pNumWindows - 1].pWindow = (WindowPtr)NULL; + swapInfo[*pNumWindows - 1].swapAction = 0; + } + else + { + /* Clear the window information just to be safe. */ + swapInfo[0].pWindow = (WindowPtr)NULL; + swapInfo[0].swapAction = 0; + } + + (*pNumWindows)--; + + FreeScratchGC(pGC); + + return(Success); + +} /* miSwapBuffers() */ + + +/****************************************************************************** + * + * DBE MI Procedure: miDbeWinPrivDelete + * + * Description: + * + * This is the MI function for deleting the dbeWindowPrivResType resource. + * This function is invoked indirectly by calling FreeResource() to free + * the resources associated with a DBE buffer ID. There are 5 ways that + * miDbeWinPrivDelete() can be called by FreeResource(). They are: + * + * - A DBE window is destroyed, in which case the DbeDestroyWindow() + * wrapper is invoked. The wrapper calls FreeResource() for all DBE + * buffer IDs. + * + * - miDbeAllocBackBufferName() calls FreeResource() to clean up resources + * after a buffer allocation failure. + * + * - The PositionWindow wrapper, miDbePositionWindow(), calls + * FreeResource() when it fails to create buffers of the new size. + * FreeResource() is called for all DBE buffer IDs. + * + * - FreeClientResources() calls FreeResource() when a client dies or the + * the server resets. + * + * When FreeResource() is called for a DBE buffer ID, the delete function + * for the only other type of DBE resource, dbeDrawableResType, is also + * invoked. This delete function (DbeDrawableDelete) is a NOOP to make + * resource deletion easier. It is not guaranteed which delete function is + * called first. Hence, we will let miDbeWinPrivDelete() free all DBE + * resources. + * + * This function deletes/frees the following stuff associated with + * the window private: + * + * - the ID node in the ID list representing the passed in ID. + * + * In addition, pDbeWindowPriv->nBufferIDs is decremented. + * + * If this function is called for the last/only buffer ID for a window, + * these are additionally deleted/freed: + * + * - the front and back pixmaps + * - the window priv itself + * + *****************************************************************************/ + +static void +miDbeWinPrivDelete(pDbeWindowPriv, bufId) + DbeWindowPrivPtr pDbeWindowPriv; + XID bufId; +{ + MiDbeWindowPrivPrivPtr pDbeWindowPrivPriv; + + + if (pDbeWindowPriv->nBufferIDs != 0) + { + /* We still have at least one more buffer ID associated with this + * window. + */ + return; + } + + + /* We have no more buffer IDs associated with this window. We need to + * free some stuff. + */ + + pDbeWindowPrivPriv = MI_DBE_WINDOW_PRIV_PRIV(pDbeWindowPriv); + + /* Destroy the front and back pixmaps. */ + if (pDbeWindowPrivPriv->pFrontBuffer) + { + (*pDbeWindowPriv->pWindow->drawable.pScreen->DestroyPixmap)( + pDbeWindowPrivPriv->pFrontBuffer); + } + if (pDbeWindowPrivPriv->pBackBuffer) + { + (*pDbeWindowPriv->pWindow->drawable.pScreen->DestroyPixmap)( + pDbeWindowPrivPriv->pBackBuffer); + } + +} /* miDbeWinPrivDelete() */ + + +/****************************************************************************** + * + * DBE MI Procedure: miDbePositionWindow + * + * Description: + * + * This function was cloned from miMbxPositionWindow() in mimultibuf.c. + * This function resizes the buffer when the window is resized. + * + *****************************************************************************/ + +static Bool +miDbePositionWindow(pWin, x, y) + WindowPtr pWin; + int x; + int y; +{ + ScreenPtr pScreen; + DbeScreenPrivPtr pDbeScreenPriv; + DbeWindowPrivPtr pDbeWindowPriv; + int width, height; + int dx, dy, dw, dh; + int sourcex, sourcey; + int destx, desty; + int savewidth, saveheight; + PixmapPtr pFrontBuffer; + PixmapPtr pBackBuffer; + Bool clear; + GCPtr pGC; + xRectangle clearRect; + Bool ret; + + + /* + ************************************************************************** + ** 1. Unwrap the member routine. + ************************************************************************** + */ + + pScreen = pWin->drawable.pScreen; + pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen); + pScreen->PositionWindow = pDbeScreenPriv->PositionWindow; + + /* + ************************************************************************** + ** 2. Do any work necessary before the member routine is called. + ** + ** In this case we do not need to do anything. + ************************************************************************** + */ + + /* + ************************************************************************** + ** 3. Call the member routine, saving its result if necessary. + ************************************************************************** + */ + + ret = (*pScreen->PositionWindow)(pWin, x, y); + + /* + ************************************************************************** + ** 4. Rewrap the member routine, restoring the wrapper value first in case + ** the wrapper (or something that it wrapped) change this value. + ************************************************************************** + */ + + pDbeScreenPriv->PositionWindow = pScreen->PositionWindow; + pScreen->PositionWindow = miDbePositionWindow; + + /* + ************************************************************************** + ** 5. Do any work necessary after the member routine has been called. + ************************************************************************** + */ + + if (!(pDbeWindowPriv = DBE_WINDOW_PRIV(pWin))) + { + return(ret); + } + + if (pDbeWindowPriv->width == pWin->drawable.width && + pDbeWindowPriv->height == pWin->drawable.height) + { + return(ret); + } + + width = pWin->drawable.width; + height = pWin->drawable.height; + + dx = pWin->drawable.x - pDbeWindowPriv->x; + dy = pWin->drawable.y - pDbeWindowPriv->y; + dw = width - pDbeWindowPriv->width; + dh = height - pDbeWindowPriv->height; + + GravityTranslate (0, 0, -dx, -dy, dw, dh, pWin->bitGravity, &destx, &desty); + + clear = ((pDbeWindowPriv->width < (unsigned short)width ) || + (pDbeWindowPriv->height < (unsigned short)height) || + (pWin->bitGravity == ForgetGravity)); + + sourcex = 0; + sourcey = 0; + savewidth = pDbeWindowPriv->width; + saveheight = pDbeWindowPriv->height; + + /* Clip rectangle to source and destination. */ + if (destx < 0) + { + savewidth += destx; + sourcex -= destx; + destx = 0; + } + + if (destx + savewidth > width) + { + savewidth = width - destx; + } + + if (desty < 0) + { + saveheight += desty; + sourcey -= desty; + desty = 0; + } + + if (desty + saveheight > height) + { + saveheight = height - desty; + } + + pDbeWindowPriv->width = width; + pDbeWindowPriv->height = height; + pDbeWindowPriv->x = pWin->drawable.x; + pDbeWindowPriv->y = pWin->drawable.y; + + pGC = GetScratchGC (pWin->drawable.depth, pScreen); + + if (clear) + { + if ((*pDbeScreenPriv->SetupBackgroundPainter)(pWin, pGC)) + { + clearRect.x = 0; + clearRect.y = 0; + clearRect.width = width; + clearRect.height = height; + } + else + { + clear = FALSE; + } + } + + /* Create DBE buffer pixmaps equal to size of resized window. */ + pFrontBuffer = (*pScreen->CreatePixmap)(pScreen, width, height, + pWin->drawable.depth); + + pBackBuffer = (*pScreen->CreatePixmap)(pScreen, width, height, + pWin->drawable.depth); + + if (!pFrontBuffer || !pBackBuffer) + { + /* We failed at creating 1 or 2 of the pixmaps. */ + + if (pFrontBuffer) + { + (*pScreen->DestroyPixmap)(pFrontBuffer); + } + + if (pBackBuffer) + { + (*pScreen->DestroyPixmap)(pBackBuffer); + } + + /* Destroy all buffers for this window. */ + while (pDbeWindowPriv) + { + /* DbeWindowPrivDelete() will free the window private if there no + * more buffer IDs associated with this window. + */ + FreeResource(pDbeWindowPriv->IDs[0], RT_NONE); + pDbeWindowPriv = DBE_WINDOW_PRIV(pWin); + } + + FreeScratchGC(pGC); + return(FALSE); + } + + else + { + /* Clear out the new DBE buffer pixmaps. */ + + MiDbeWindowPrivPrivPtr pDbeWindowPrivPriv; + + + pDbeWindowPrivPriv = MI_DBE_WINDOW_PRIV_PRIV(pDbeWindowPriv); + ValidateGC((DrawablePtr)pFrontBuffer, pGC); + + /* I suppose this could avoid quite a bit of work if + * it computed the minimal area required. + */ + if (clear) + { + (*pGC->ops->PolyFillRect)((DrawablePtr)pFrontBuffer, pGC, 1, + &clearRect); + (*pGC->ops->PolyFillRect)((DrawablePtr)pBackBuffer , pGC, 1, + &clearRect); + } + + /* Copy the contents of the old DBE pixmaps to the new pixmaps. */ + if (pWin->bitGravity != ForgetGravity) + { + (*pGC->ops->CopyArea)((DrawablePtr)pDbeWindowPrivPriv->pFrontBuffer, + (DrawablePtr)pFrontBuffer, pGC, sourcex, + sourcey, savewidth, saveheight, destx, desty); + (*pGC->ops->CopyArea)((DrawablePtr)pDbeWindowPrivPriv->pBackBuffer, + (DrawablePtr)pBackBuffer, pGC, sourcex, + sourcey, savewidth, saveheight, destx, desty); + } + + /* Destroy the old pixmaps, and point the DBE window priv to the new + * pixmaps. + */ + + (*pScreen->DestroyPixmap)(pDbeWindowPrivPriv->pFrontBuffer); + (*pScreen->DestroyPixmap)(pDbeWindowPrivPriv->pBackBuffer); + + pDbeWindowPrivPriv->pFrontBuffer = pFrontBuffer; + pDbeWindowPrivPriv->pBackBuffer = pBackBuffer; + + /* Make sure all XID are associated with the new back pixmap. */ + miDbeAliasBuffers(pDbeWindowPriv); + + FreeScratchGC(pGC); + } + + return(ret); + +} /* miDbePositionWindow() */ + + +/****************************************************************************** + * + * DBE MI Procedure: miDbeResetProc + * + * Description: + * + * This function is called from DbeResetProc(), which is called at the end + * of every server generation. This function peforms any MI-specific + * shutdown tasks. + * + *****************************************************************************/ + +static void +miDbeResetProc(pScreen) + ScreenPtr pScreen; +{ + DbeScreenPrivPtr pDbeScreenPriv; + + + pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen); + + /* Unwrap wrappers */ + pScreen->PositionWindow = pDbeScreenPriv->PositionWindow; + +} /* miDbeResetProc() */ + + +/****************************************************************************** + * + * DBE MI Procedure: miDbeInit + * + * Description: + * + * This is the MI initialization function called by DbeExtensionInit(). + * + *****************************************************************************/ + +Bool +miDbeInit(pScreen, pDbeScreenPriv) + ScreenPtr pScreen; + DbeScreenPrivPtr pDbeScreenPriv; +{ + /* Copy resource types created by DIX */ + dbeDrawableResType = pDbeScreenPriv->dbeDrawableResType; + dbeWindowPrivResType = pDbeScreenPriv->dbeWindowPrivResType; + + /* Copy private indices created by DIX */ + dbeScreenPrivIndex = pDbeScreenPriv->dbeScreenPrivIndex; + dbeWindowPrivIndex = pDbeScreenPriv->dbeWindowPrivIndex; + + /* Reset the window priv privs if generations do not match. */ + if (miDbePrivPrivGeneration != serverGeneration) + { + /* + ********************************************************************** + ** Allocate the window priv priv. + ********************************************************************** + */ + + miDbeWindowPrivPrivIndex = (*pDbeScreenPriv->AllocWinPrivPrivIndex)(); + + if (!(*pDbeScreenPriv->AllocWinPrivPriv)(pScreen, + miDbeWindowPrivPrivIndex, sizeof(MiDbeWindowPrivPrivRec))) + { + return(FALSE); + } + + /* Make sure we only do this code once. */ + miDbePrivPrivGeneration = serverGeneration; + + } /* if -- Reset priv privs. */ + + /* Wrap functions. */ + pDbeScreenPriv->PositionWindow = pScreen->PositionWindow; + pScreen->PositionWindow = miDbePositionWindow; + + /* Initialize the per-screen DBE function pointers. */ + pDbeScreenPriv->GetVisualInfo = miDbeGetVisualInfo; + pDbeScreenPriv->AllocBackBufferName = miDbeAllocBackBufferName; + pDbeScreenPriv->SwapBuffers = miDbeSwapBuffers; + pDbeScreenPriv->BeginIdiom = 0; + pDbeScreenPriv->EndIdiom = 0; + pDbeScreenPriv->ResetProc = miDbeResetProc; + pDbeScreenPriv->WinPrivDelete = miDbeWinPrivDelete; + + /* The mi implementation doesn't need buffer validation. */ + pDbeScreenPriv->ValidateBuffer = (void (*)())NoopDDA; + + return(TRUE); + +} /* miDbeInit() */ |