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IABSD.fr/xenocara/xserver/dbe/dbe.c
matthieu
- xserver/dbe/dbe.c
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/****************************************************************************** * * 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. * * DIX DBE code * *****************************************************************************/ /* INCLUDES */ #ifdef HAVE_DIX_CONFIG_H #include <dix-config.h> #endif #include <string.h> #include <stdint.h> #include <X11/X.h> #include <X11/Xproto.h> #include "scrnintstr.h" #include "extnsionst.h" #include "extinit.h" #include "gcstruct.h" #include "dixstruct.h" #define NEED_DBE_PROTOCOL #include "dbestruct.h" #include "midbe.h" #include "xace.h" /* GLOBALS */ /* These are globals for use by DDX */ DevPrivateKeyRec dbeScreenPrivKeyRec; DevPrivateKeyRec dbeWindowPrivKeyRec; /* These are globals for use by DDX */ RESTYPE dbeDrawableResType; RESTYPE dbeWindowPrivResType; /* Used to generate DBE's BadBuffer error. */ static int dbeErrorBase; /****************************************************************************** * * DBE DIX Procedure: DbeStubScreen * * Description: * * This is function stubs the function pointers in the given DBE screen * private and increments the number of stubbed screens. * *****************************************************************************/ static void DbeStubScreen(DbeScreenPrivPtr pDbeScreenPriv, int *nStubbedScreens) { /* Stub DIX. */ pDbeScreenPriv->SetupBackgroundPainter = NULL; /* Do not unwrap PositionWindow nor DestroyWindow. If the DDX * initialization function failed, we assume that it did not wrap * PositionWindow. Also, DestroyWindow is only wrapped if the DDX * initialization function succeeded. */ /* Stub DDX. */ pDbeScreenPriv->GetVisualInfo = NULL; pDbeScreenPriv->AllocBackBufferName = NULL; pDbeScreenPriv->SwapBuffers = NULL; pDbeScreenPriv->WinPrivDelete = NULL; (*nStubbedScreens)++; } /* DbeStubScreen() */ /****************************************************************************** * * DBE DIX Procedure: ProcDbeGetVersion * * Description: * * This function is for processing a DbeGetVersion request. * This request returns the major and minor version numbers of this * extension. * * Return Values: * * Success * *****************************************************************************/ static int ProcDbeGetVersion(ClientPtr client) { /* REQUEST(xDbeGetVersionReq); */ xDbeGetVersionReply rep = { .type = X_Reply, .sequenceNumber = client->sequence, .length = 0, .majorVersion = DBE_MAJOR_VERSION, .minorVersion = DBE_MINOR_VERSION }; REQUEST_SIZE_MATCH(xDbeGetVersionReq); if (client->swapped) { swaps(&rep.sequenceNumber); } WriteToClient(client, sizeof(xDbeGetVersionReply), &rep); return Success; } /* ProcDbeGetVersion() */ /****************************************************************************** * * DBE DIX Procedure: ProcDbeAllocateBackBufferName * * Description: * * This function is for processing a DbeAllocateBackBufferName request. * This request allocates a drawable ID used to refer to the back buffer * of a window. * * Return Values: * * BadAlloc - server can not allocate resources * BadIDChoice - id is out of range for client; id is already in use * BadMatch - window is not an InputOutput window; * visual of window is not on list returned by * DBEGetVisualInfo; * BadValue - invalid swap action is specified * BadWindow - window is not a valid window * Success * *****************************************************************************/ static int ProcDbeAllocateBackBufferName(ClientPtr client) { REQUEST(xDbeAllocateBackBufferNameReq); WindowPtr pWin; DbeScreenPrivPtr pDbeScreenPriv; DbeWindowPrivPtr pDbeWindowPriv; XdbeScreenVisualInfo scrVisInfo; register int i; Bool visualMatched = FALSE; xDbeSwapAction swapAction; VisualID visual; int status; int add_index; REQUEST_SIZE_MATCH(xDbeAllocateBackBufferNameReq); /* The window must be valid. */ status = dixLookupWindow(&pWin, stuff->window, client, DixManageAccess); if (status != Success) return status; /* The window must be InputOutput. */ if (pWin->drawable.class != InputOutput) { return BadMatch; } /* The swap action must be valid. */ swapAction = stuff->swapAction; /* use local var for performance. */ if ((swapAction != XdbeUndefined) && (swapAction != XdbeBackground) && (swapAction != XdbeUntouched) && (swapAction != XdbeCopied)) { return BadValue; } /* The id must be in range and not already in use. */ LEGAL_NEW_RESOURCE(stuff->buffer, client); /* The visual of the window must be in the list returned by * GetVisualInfo. */ pDbeScreenPriv = DBE_SCREEN_PRIV_FROM_WINDOW(pWin); if (!pDbeScreenPriv->GetVisualInfo) return BadMatch; /* screen doesn't support double buffering */ if (!(*pDbeScreenPriv->GetVisualInfo) (pWin->drawable.pScreen, &scrVisInfo)) { /* GetVisualInfo() failed to allocate visual info data. */ return BadAlloc; } /* See if the window's visual is on the list. */ visual = wVisual(pWin); for (i = 0; (i < scrVisInfo.count) && !visualMatched; i++) { if (scrVisInfo.visinfo[i].visual == visual) { visualMatched = TRUE; } } /* Free what was allocated by the GetVisualInfo() call above. */ free(scrVisInfo.visinfo); if (!visualMatched) { return BadMatch; } if ((pDbeWindowPriv = DBE_WINDOW_PRIV(pWin)) == NULL) { /* There is no buffer associated with the window. * Allocate a window priv. */ pDbeWindowPriv = calloc(1, sizeof(DbeWindowPrivRec)); if (!pDbeWindowPriv) return BadAlloc; /* Fill out window priv information. */ pDbeWindowPriv->pWindow = pWin; pDbeWindowPriv->width = pWin->drawable.width; pDbeWindowPriv->height = pWin->drawable.height; pDbeWindowPriv->x = pWin->drawable.x; pDbeWindowPriv->y = pWin->drawable.y; pDbeWindowPriv->nBufferIDs = 0; /* Set the buffer ID array pointer to the initial (static) array). */ pDbeWindowPriv->IDs = pDbeWindowPriv->initIDs; /* Initialize the buffer ID list. */ pDbeWindowPriv->maxAvailableIDs = DBE_INIT_MAX_IDS; pDbeWindowPriv->IDs[0] = stuff->buffer; add_index = 0; for (i = 0; i < DBE_INIT_MAX_IDS; i++) { pDbeWindowPriv->IDs[i] = DBE_FREE_ID_ELEMENT; } /* Actually connect the window priv to the window. */ dixSetPrivate(&pWin->devPrivates, dbeWindowPrivKey, pDbeWindowPriv); } /* if -- There is no buffer associated with the window. */ else { /* A buffer is already associated with the window. * Add the new buffer ID to the array, reallocating the array memory * if necessary. */ /* Determine if there is a free element in the ID array. */ for (i = 0; i < pDbeWindowPriv->maxAvailableIDs; i++) { if (pDbeWindowPriv->IDs[i] == DBE_FREE_ID_ELEMENT) { /* There is still room in the ID array. */ break; } } if (i == pDbeWindowPriv->maxAvailableIDs) { /* No more room in the ID array -- reallocate another array. */ XID *pIDs; /* Setup an array pointer for the realloc operation below. */ if (pDbeWindowPriv->maxAvailableIDs == DBE_INIT_MAX_IDS) { /* We will malloc a new array. */ pIDs = NULL; } else { /* We will realloc a new array. */ pIDs = pDbeWindowPriv->IDs; } /* malloc/realloc a new array and initialize all elements to 0. */ pDbeWindowPriv->IDs = reallocarray(pIDs, pDbeWindowPriv->maxAvailableIDs + DBE_INCR_MAX_IDS, sizeof(XID)); if (!pDbeWindowPriv->IDs) { return BadAlloc; } memset(&pDbeWindowPriv->IDs[pDbeWindowPriv->nBufferIDs], 0, (pDbeWindowPriv->maxAvailableIDs + DBE_INCR_MAX_IDS - pDbeWindowPriv->nBufferIDs) * sizeof(XID)); if (pDbeWindowPriv->maxAvailableIDs == DBE_INIT_MAX_IDS) { /* We just went from using the initial (static) array to a * newly allocated array. Copy the IDs from the initial array * to the new array. */ memcpy(pDbeWindowPriv->IDs, pDbeWindowPriv->initIDs, DBE_INIT_MAX_IDS * sizeof(XID)); } pDbeWindowPriv->maxAvailableIDs += DBE_INCR_MAX_IDS; } add_index = i; } /* else -- A buffer is already associated with the window. */ /* Call the DDX routine to allocate the back buffer. */ status = (*pDbeScreenPriv->AllocBackBufferName) (pWin, stuff->buffer, stuff->swapAction); if (status == Success) { pDbeWindowPriv->IDs[add_index] = stuff->buffer; if (!AddResource(stuff->buffer, dbeWindowPrivResType, (void *) pDbeWindowPriv)) { pDbeWindowPriv->IDs[add_index] = DBE_FREE_ID_ELEMENT; if (pDbeWindowPriv->nBufferIDs == 0) { status = BadAlloc; goto out_free; } } } else { /* The DDX buffer allocation routine failed for the first buffer of * this window. */ if (pDbeWindowPriv->nBufferIDs == 0) { goto out_free; } } /* Increment the number of buffers (XIDs) associated with this window. */ pDbeWindowPriv->nBufferIDs++; /* Set swap action on all calls. */ pDbeWindowPriv->swapAction = stuff->swapAction; return status; out_free: dixSetPrivate(&pWin->devPrivates, dbeWindowPrivKey, NULL); free(pDbeWindowPriv); return status; } /* ProcDbeAllocateBackBufferName() */ /****************************************************************************** * * DBE DIX Procedure: ProcDbeDeallocateBackBufferName * * Description: * * This function is for processing a DbeDeallocateBackBufferName request. * This request frees a drawable ID that was obtained by a * DbeAllocateBackBufferName request. * * Return Values: * * BadBuffer - buffer to deallocate is not associated with a window * Success * *****************************************************************************/ static int ProcDbeDeallocateBackBufferName(ClientPtr client) { REQUEST(xDbeDeallocateBackBufferNameReq); DbeWindowPrivPtr pDbeWindowPriv; int rc, i; void *val; REQUEST_SIZE_MATCH(xDbeDeallocateBackBufferNameReq); /* Buffer name must be valid */ rc = dixLookupResourceByType((void **) &pDbeWindowPriv, stuff->buffer, dbeWindowPrivResType, client, DixDestroyAccess); if (rc != Success) return rc; rc = dixLookupResourceByType(&val, stuff->buffer, dbeDrawableResType, client, DixDestroyAccess); if (rc != Success) return rc; /* Make sure that the id is valid for the window. * This is paranoid code since we already looked up the ID by type * above. */ for (i = 0; i < pDbeWindowPriv->nBufferIDs; i++) { /* Loop through the ID list to find the ID. */ if (pDbeWindowPriv->IDs[i] == stuff->buffer) { break; } } if (i == pDbeWindowPriv->nBufferIDs) { /* We did not find the ID in the ID list. */ client->errorValue = stuff->buffer; return dbeErrorBase + DbeBadBuffer; } FreeResource(stuff->buffer, RT_NONE); return Success; } /* ProcDbeDeallocateBackBufferName() */ /****************************************************************************** * * DBE DIX Procedure: ProcDbeSwapBuffers * * Description: * * This function is for processing a DbeSwapBuffers request. * This request swaps the buffers for all windows listed, applying the * appropriate swap action for each window. * * Return Values: * * BadAlloc - local allocation failed; this return value is not defined * by the protocol * BadMatch - a window in request is not double-buffered; a window in * request is listed more than once * BadValue - invalid swap action is specified; no swap action is * specified * BadWindow - a window in request is not valid * Success * *****************************************************************************/ static int ProcDbeSwapBuffers(ClientPtr client) { REQUEST(xDbeSwapBuffersReq); WindowPtr pWin; DbeScreenPrivPtr pDbeScreenPriv; DbeSwapInfoPtr swapInfo; xDbeSwapInfo *dbeSwapInfo; int error; unsigned int i, j; unsigned int nStuff; int nStuff_i; /* DDX API requires int for nStuff */ REQUEST_AT_LEAST_SIZE(xDbeSwapBuffersReq); nStuff = stuff->n; /* use local variable for performance. */ if (nStuff == 0) { REQUEST_SIZE_MATCH(xDbeSwapBuffersReq); return Success; } if (nStuff > UINT32_MAX / sizeof(DbeSwapInfoRec)) return BadAlloc; REQUEST_FIXED_SIZE(xDbeSwapBuffersReq, nStuff * sizeof(xDbeSwapInfo)); /* Get to the swap info appended to the end of the request. */ dbeSwapInfo = (xDbeSwapInfo *) &stuff[1]; /* Allocate array to record swap information. */ swapInfo = xallocarray(nStuff, sizeof(DbeSwapInfoRec)); if (swapInfo == NULL) { return BadAlloc; } for (i = 0; i < nStuff; i++) { /* Check all windows to swap. */ /* Each window must be a valid window - BadWindow. */ error = dixLookupWindow(&pWin, dbeSwapInfo[i].window, client, DixWriteAccess); if (error != Success) { free(swapInfo); return error; } /* Each window must be double-buffered - BadMatch. */ if (DBE_WINDOW_PRIV(pWin) == NULL) { free(swapInfo); return BadMatch; } /* Each window must only be specified once - BadMatch. */ for (j = i + 1; j < nStuff; j++) { if (dbeSwapInfo[i].window == dbeSwapInfo[j].window) { free(swapInfo); return BadMatch; } } /* Each swap action must be valid - BadValue. */ if ((dbeSwapInfo[i].swapAction != XdbeUndefined) && (dbeSwapInfo[i].swapAction != XdbeBackground) && (dbeSwapInfo[i].swapAction != XdbeUntouched) && (dbeSwapInfo[i].swapAction != XdbeCopied)) { free(swapInfo); return BadValue; } /* Everything checks out OK. Fill in the swap info array. */ swapInfo[i].pWindow = pWin; swapInfo[i].swapAction = dbeSwapInfo[i].swapAction; } /* for (i = 0; i < nStuff; i++) */ /* Call the DDX routine to perform the swap(s). The DDX routine should * scan the swap list (swap info), swap any buffers that it knows how to * handle, delete them from the list, and update nStuff to indicate how * many windows it did not handle. * * This scheme allows a range of sophistication in the DDX SwapBuffers() * implementation. Naive implementations could just swap the first buffer * in the list, move the last buffer to the front, decrement nStuff, and * return. The next level of sophistication could be to scan the whole * list for windows on the same screen. Up another level, the DDX routine * could deal with cross-screen synchronization. */ nStuff_i = nStuff; while (nStuff_i > 0) { pDbeScreenPriv = DBE_SCREEN_PRIV_FROM_WINDOW(swapInfo[0].pWindow); error = (*pDbeScreenPriv->SwapBuffers) (client, &nStuff_i, swapInfo); if (error != Success) { free(swapInfo); return error; } } free(swapInfo); return Success; } /* ProcDbeSwapBuffers() */ /****************************************************************************** * * DBE DIX Procedure: ProcDbeGetVisualInfo * * Description: * * This function is for processing a ProcDbeGetVisualInfo request. * This request returns information about which visuals support * double buffering. * * Return Values: * * BadDrawable - value in screen specifiers is not a valid drawable * Success * *****************************************************************************/ static int ProcDbeGetVisualInfo(ClientPtr client) { REQUEST(xDbeGetVisualInfoReq); DbeScreenPrivPtr pDbeScreenPriv; xDbeGetVisualInfoReply rep; Drawable *drawables; DrawablePtr *pDrawables = NULL; register int i, j, rc; register int count; /* number of visual infos in reply */ register int length; /* length of reply */ ScreenPtr pScreen; XdbeScreenVisualInfo *pScrVisInfo; REQUEST_AT_LEAST_SIZE(xDbeGetVisualInfoReq); if (stuff->n > UINT32_MAX / sizeof(CARD32)) return BadLength; REQUEST_FIXED_SIZE(xDbeGetVisualInfoReq, stuff->n * sizeof(CARD32)); if (stuff->n > UINT32_MAX / sizeof(DrawablePtr)) return BadAlloc; /* Make sure any specified drawables are valid. */ if (stuff->n != 0) { if (!(pDrawables = xallocarray(stuff->n, sizeof(DrawablePtr)))) { return BadAlloc; } drawables = (Drawable *) &stuff[1]; for (i = 0; i < stuff->n; i++) { rc = dixLookupDrawable(pDrawables + i, drawables[i], client, 0, DixGetAttrAccess); if (rc != Success) { free(pDrawables); return rc; } } } count = (stuff->n == 0) ? screenInfo.numScreens : stuff->n; if (!(pScrVisInfo = calloc(count, sizeof(XdbeScreenVisualInfo)))) { free(pDrawables); return BadAlloc; } length = 0; for (i = 0; i < count; i++) { pScreen = (stuff->n == 0) ? screenInfo.screens[i] : pDrawables[i]->pScreen; pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen); rc = XaceHook(XACE_SCREEN_ACCESS, client, pScreen, DixGetAttrAccess); if (rc != Success) goto freeScrVisInfo; if (!(*pDbeScreenPriv->GetVisualInfo) (pScreen, &pScrVisInfo[i])) { /* We failed to alloc pScrVisInfo[i].visinfo. */ rc = BadAlloc; /* Free visinfos that we allocated for previous screen infos. */ goto freeScrVisInfo; } /* Account for n, number of xDbeVisInfo items in list. */ length += sizeof(CARD32); /* Account for n xDbeVisInfo items */ length += pScrVisInfo[i].count * sizeof(xDbeVisInfo); } rep = (xDbeGetVisualInfoReply) { .type = X_Reply, .sequenceNumber = client->sequence, .length = bytes_to_int32(length), .m = count }; if (client->swapped) { swaps(&rep.sequenceNumber); swapl(&rep.length); swapl(&rep.m); } /* Send off reply. */ WriteToClient(client, sizeof(xDbeGetVisualInfoReply), &rep); for (i = 0; i < count; i++) { CARD32 data32; /* For each screen in the reply, send off the visual info */ /* Send off number of visuals. */ data32 = (CARD32) pScrVisInfo[i].count; if (client->swapped) { swapl(&data32); } WriteToClient(client, sizeof(CARD32), &data32); /* Now send off visual info items. */ for (j = 0; j < pScrVisInfo[i].count; j++) { xDbeVisInfo visInfo; /* Copy the data in the client data structure to a protocol * data structure. We will send data to the client from the * protocol data structure. */ visInfo.visualID = (CARD32) pScrVisInfo[i].visinfo[j].visual; visInfo.depth = (CARD8) pScrVisInfo[i].visinfo[j].depth; visInfo.perfLevel = (CARD8) pScrVisInfo[i].visinfo[j].perflevel; if (client->swapped) { swapl(&visInfo.visualID); /* We do not need to swap depth and perfLevel since they are * already 1 byte quantities. */ } /* Write visualID(32), depth(8), perfLevel(8), and pad(16). */ WriteToClient(client, 2 * sizeof(CARD32), &visInfo.visualID); } } rc = Success; freeScrVisInfo: /* Clean up memory. */ for (i = 0; i < count; i++) { free(pScrVisInfo[i].visinfo); } free(pScrVisInfo); free(pDrawables); return rc; } /* ProcDbeGetVisualInfo() */ /****************************************************************************** * * DBE DIX Procedure: ProcDbeGetbackBufferAttributes * * Description: * * This function is for processing a ProcDbeGetbackBufferAttributes * request. This request returns information about a back buffer. * * Return Values: * * Success * *****************************************************************************/ static int ProcDbeGetBackBufferAttributes(ClientPtr client) { REQUEST(xDbeGetBackBufferAttributesReq); xDbeGetBackBufferAttributesReply rep = { .type = X_Reply, .sequenceNumber = client->sequence, .length = 0 }; DbeWindowPrivPtr pDbeWindowPriv; int rc; REQUEST_SIZE_MATCH(xDbeGetBackBufferAttributesReq); rc = dixLookupResourceByType((void **) &pDbeWindowPriv, stuff->buffer, dbeWindowPrivResType, client, DixGetAttrAccess); if (rc == Success) { rep.attributes = pDbeWindowPriv->pWindow->drawable.id; } else { rep.attributes = None; } if (client->swapped) { swaps(&rep.sequenceNumber); swapl(&rep.length); swapl(&rep.attributes); } WriteToClient(client, sizeof(xDbeGetBackBufferAttributesReply), &rep); return Success; } /* ProcDbeGetbackBufferAttributes() */ /****************************************************************************** * * DBE DIX Procedure: ProcDbeDispatch * * Description: * * This function dispatches DBE requests. * *****************************************************************************/ static int ProcDbeDispatch(ClientPtr client) { REQUEST(xReq); switch (stuff->data) { case X_DbeGetVersion: return (ProcDbeGetVersion(client)); case X_DbeAllocateBackBufferName: return (ProcDbeAllocateBackBufferName(client)); case X_DbeDeallocateBackBufferName: return (ProcDbeDeallocateBackBufferName(client)); case X_DbeSwapBuffers: return (ProcDbeSwapBuffers(client)); case X_DbeBeginIdiom: return Success; case X_DbeEndIdiom: return Success; case X_DbeGetVisualInfo: return (ProcDbeGetVisualInfo(client)); case X_DbeGetBackBufferAttributes: return (ProcDbeGetBackBufferAttributes(client)); default: return BadRequest; } } /* ProcDbeDispatch() */ /****************************************************************************** * * DBE DIX Procedure: SProcDbeGetVersion * * Description: * * This function is for processing a DbeGetVersion request on a swapped * server. This request returns the major and minor version numbers of * this extension. * * Return Values: * * Success * *****************************************************************************/ static int _X_COLD SProcDbeGetVersion(ClientPtr client) { REQUEST(xDbeGetVersionReq); swaps(&stuff->length); return (ProcDbeGetVersion(client)); } /* SProcDbeGetVersion() */ /****************************************************************************** * * DBE DIX Procedure: SProcDbeAllocateBackBufferName * * Description: * * This function is for processing a DbeAllocateBackBufferName request on * a swapped server. This request allocates a drawable ID used to refer * to the back buffer of a window. * * Return Values: * * BadAlloc - server can not allocate resources * BadIDChoice - id is out of range for client; id is already in use * BadMatch - window is not an InputOutput window; * visual of window is not on list returned by * DBEGetVisualInfo; * BadValue - invalid swap action is specified * BadWindow - window is not a valid window * Success * *****************************************************************************/ static int _X_COLD SProcDbeAllocateBackBufferName(ClientPtr client) { REQUEST(xDbeAllocateBackBufferNameReq); swaps(&stuff->length); REQUEST_SIZE_MATCH(xDbeAllocateBackBufferNameReq); swapl(&stuff->window); swapl(&stuff->buffer); /* stuff->swapAction is a byte. We do not need to swap this field. */ return (ProcDbeAllocateBackBufferName(client)); } /* SProcDbeAllocateBackBufferName() */ /****************************************************************************** * * DBE DIX Procedure: SProcDbeDeallocateBackBufferName * * Description: * * This function is for processing a DbeDeallocateBackBufferName request * on a swapped server. This request frees a drawable ID that was * obtained by a DbeAllocateBackBufferName request. * * Return Values: * * BadBuffer - buffer to deallocate is not associated with a window * Success * *****************************************************************************/ static int _X_COLD SProcDbeDeallocateBackBufferName(ClientPtr client) { REQUEST(xDbeDeallocateBackBufferNameReq); swaps(&stuff->length); REQUEST_SIZE_MATCH(xDbeDeallocateBackBufferNameReq); swapl(&stuff->buffer); return (ProcDbeDeallocateBackBufferName(client)); } /* SProcDbeDeallocateBackBufferName() */ /****************************************************************************** * * DBE DIX Procedure: SProcDbeSwapBuffers * * Description: * * This function is for processing a DbeSwapBuffers request on a swapped * server. This request swaps the buffers for all windows listed, * applying the appropriate swap action for each window. * * Return Values: * * BadMatch - a window in request is not double-buffered; a window in * request is listed more than once; all windows in request do * not have the same root * BadValue - invalid swap action is specified * BadWindow - a window in request is not valid * Success * *****************************************************************************/ static int _X_COLD SProcDbeSwapBuffers(ClientPtr client) { REQUEST(xDbeSwapBuffersReq); unsigned int i; xDbeSwapInfo *pSwapInfo; swaps(&stuff->length); REQUEST_AT_LEAST_SIZE(xDbeSwapBuffersReq); swapl(&stuff->n); if (stuff->n > UINT32_MAX / sizeof(DbeSwapInfoRec)) return BadLength; REQUEST_FIXED_SIZE(xDbeSwapBuffersReq, stuff->n * sizeof(xDbeSwapInfo)); if (stuff->n != 0) { pSwapInfo = (xDbeSwapInfo *) stuff + 1; /* The swap info following the fix part of this request is a window(32) * followed by a 1 byte swap action and then 3 pad bytes. We only need * to swap the window information. */ for (i = 0; i < stuff->n; i++) { swapl(&pSwapInfo->window); } } return (ProcDbeSwapBuffers(client)); } /* SProcDbeSwapBuffers() */ /****************************************************************************** * * DBE DIX Procedure: SProcDbeGetVisualInfo * * Description: * * This function is for processing a ProcDbeGetVisualInfo request on a * swapped server. This request returns information about which visuals * support double buffering. * * Return Values: * * BadDrawable - value in screen specifiers is not a valid drawable * Success * *****************************************************************************/ static int _X_COLD SProcDbeGetVisualInfo(ClientPtr client) { REQUEST(xDbeGetVisualInfoReq); swaps(&stuff->length); REQUEST_AT_LEAST_SIZE(xDbeGetVisualInfoReq); swapl(&stuff->n); SwapRestL(stuff); return (ProcDbeGetVisualInfo(client)); } /* SProcDbeGetVisualInfo() */ /****************************************************************************** * * DBE DIX Procedure: SProcDbeGetbackBufferAttributes * * Description: * * This function is for processing a ProcDbeGetbackBufferAttributes * request on a swapped server. This request returns information about a * back buffer. * * Return Values: * * Success * *****************************************************************************/ static int _X_COLD SProcDbeGetBackBufferAttributes(ClientPtr client) { REQUEST(xDbeGetBackBufferAttributesReq); swaps(&stuff->length); REQUEST_SIZE_MATCH(xDbeGetBackBufferAttributesReq); swapl(&stuff->buffer); return (ProcDbeGetBackBufferAttributes(client)); } /* SProcDbeGetBackBufferAttributes() */ /****************************************************************************** * * DBE DIX Procedure: SProcDbeDispatch * * Description: * * This function dispatches DBE requests on a swapped server. * *****************************************************************************/ static int _X_COLD SProcDbeDispatch(ClientPtr client) { REQUEST(xReq); switch (stuff->data) { case X_DbeGetVersion: return (SProcDbeGetVersion(client)); case X_DbeAllocateBackBufferName: return (SProcDbeAllocateBackBufferName(client)); case X_DbeDeallocateBackBufferName: return (SProcDbeDeallocateBackBufferName(client)); case X_DbeSwapBuffers: return (SProcDbeSwapBuffers(client)); case X_DbeBeginIdiom: return Success; case X_DbeEndIdiom: return Success; case X_DbeGetVisualInfo: return (SProcDbeGetVisualInfo(client)); case X_DbeGetBackBufferAttributes: return (SProcDbeGetBackBufferAttributes(client)); default: return BadRequest; } } /* SProcDbeDispatch() */ /****************************************************************************** * * DBE DIX Procedure: DbeSetupBackgroundPainter * * Description: * * This function sets up pGC to clear pixmaps. * * Return Values: * * TRUE - setup was successful * FALSE - the window's background state is NONE * *****************************************************************************/ static Bool DbeSetupBackgroundPainter(WindowPtr pWin, GCPtr pGC) { ChangeGCVal gcvalues[4]; int ts_x_origin, ts_y_origin; PixUnion background; int backgroundState; Mask gcmask; /* First take care of any ParentRelative stuff by altering the * tile/stipple origin to match the coordinates of the upper-left * corner of the first ancestor without a ParentRelative background. * This coordinate is, of course, negative. */ ts_x_origin = ts_y_origin = 0; while (pWin->backgroundState == ParentRelative) { ts_x_origin -= pWin->origin.x; ts_y_origin -= pWin->origin.y; pWin = pWin->parent; } backgroundState = pWin->backgroundState; background = pWin->background; switch (backgroundState) { case BackgroundPixel: gcvalues[0].val = background.pixel; gcvalues[1].val = FillSolid; gcmask = GCForeground | GCFillStyle; break; case BackgroundPixmap: gcvalues[0].val = FillTiled; gcvalues[1].ptr = background.pixmap; gcvalues[2].val = ts_x_origin; gcvalues[3].val = ts_y_origin; gcmask = GCFillStyle | GCTile | GCTileStipXOrigin | GCTileStipYOrigin; break; default: /* pWin->backgroundState == None */ return FALSE; } return ChangeGC(NullClient, pGC, gcmask, gcvalues) == 0; } /* DbeSetupBackgroundPainter() */ /****************************************************************************** * * DBE DIX Procedure: DbeDrawableDelete * * Description: * * This is the resource delete function for dbeDrawableResType. * It is registered when the drawable resource type is created in * DbeExtensionInit(). * * To make resource deletion simple, we do not do anything in this function * and leave all resource deletion to DbeWindowPrivDelete(), which will * eventually be called or already has been called. Deletion functions are * not guaranteed to be called in any particular order. * *****************************************************************************/ static int DbeDrawableDelete(void *pDrawable, XID id) { return Success; } /* DbeDrawableDelete() */ /****************************************************************************** * * DBE DIX Procedure: DbeWindowPrivDelete * * Description: * * This is the resource delete function for dbeWindowPrivResType. * It is registered when the drawable resource type is created in * DbeExtensionInit(). * *****************************************************************************/ static int DbeWindowPrivDelete(void *pDbeWinPriv, XID id) { DbeScreenPrivPtr pDbeScreenPriv; DbeWindowPrivPtr pDbeWindowPriv = (DbeWindowPrivPtr) pDbeWinPriv; int i; /* ************************************************************************** ** Remove the buffer ID from the ID array. ************************************************************************** */ /* Find the ID in the ID array. */ i = 0; while ((i < pDbeWindowPriv->nBufferIDs) && (pDbeWindowPriv->IDs[i] != id)) { i++; } if (i == pDbeWindowPriv->nBufferIDs) { /* We did not find the ID in the array. We should never get here. */ return BadValue; } /* Remove the ID from the array. */ if (i < (pDbeWindowPriv->nBufferIDs - 1)) { /* Compress the buffer ID array, overwriting the ID in the process. */ memmove(&pDbeWindowPriv->IDs[i], &pDbeWindowPriv->IDs[i + 1], (pDbeWindowPriv->nBufferIDs - i - 1) * sizeof(XID)); } else { /* We are removing the last ID in the array, in which case, the * assignment below is all that we need to do. */ } pDbeWindowPriv->IDs[pDbeWindowPriv->nBufferIDs - 1] = DBE_FREE_ID_ELEMENT; pDbeWindowPriv->nBufferIDs--; /* If an extended array was allocated, then check to see if the remaining * buffer IDs will fit in the static array. */ if ((pDbeWindowPriv->maxAvailableIDs > DBE_INIT_MAX_IDS) && (pDbeWindowPriv->nBufferIDs == DBE_INIT_MAX_IDS)) { /* Copy the IDs back into the static array. */ memcpy(pDbeWindowPriv->initIDs, pDbeWindowPriv->IDs, DBE_INIT_MAX_IDS * sizeof(XID)); /* Free the extended array; use the static array. */ free(pDbeWindowPriv->IDs); pDbeWindowPriv->IDs = pDbeWindowPriv->initIDs; pDbeWindowPriv->maxAvailableIDs = DBE_INIT_MAX_IDS; } /* ************************************************************************** ** Perform DDX level tasks. ************************************************************************** */ pDbeScreenPriv = DBE_SCREEN_PRIV_FROM_WINDOW_PRIV((DbeWindowPrivPtr) pDbeWindowPriv); (*pDbeScreenPriv->WinPrivDelete) ((DbeWindowPrivPtr) pDbeWindowPriv, id); /* ************************************************************************** ** Perform miscellaneous tasks if this is the last buffer associated ** with the window. ************************************************************************** */ if (pDbeWindowPriv->nBufferIDs == 0) { /* Reset the DBE window priv pointer. */ dixSetPrivate(&pDbeWindowPriv->pWindow->devPrivates, dbeWindowPrivKey, NULL); /* We are done with the window priv. */ free(pDbeWindowPriv); } return Success; } /* DbeWindowPrivDelete() */ /****************************************************************************** * * DBE DIX Procedure: DbeResetProc * * Description: * * This routine is called at the end of every server generation. * It deallocates any memory reserved for the extension and performs any * other tasks related to shutting down the extension. * *****************************************************************************/ static void DbeResetProc(ExtensionEntry * extEntry) { int i; ScreenPtr pScreen; DbeScreenPrivPtr pDbeScreenPriv; for (i = 0; i < screenInfo.numScreens; i++) { pScreen = screenInfo.screens[i]; pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen); if (pDbeScreenPriv) { /* Unwrap DestroyWindow, which was wrapped in DbeExtensionInit(). */ pScreen->DestroyWindow = pDbeScreenPriv->DestroyWindow; pScreen->PositionWindow = pDbeScreenPriv->PositionWindow; free(pDbeScreenPriv); } } } /* DbeResetProc() */ /****************************************************************************** * * DBE DIX Procedure: DbeDestroyWindow * * Description: * * This is the wrapper for pScreen->DestroyWindow. * This function frees buffer resources for a window before it is * destroyed. * *****************************************************************************/ static Bool DbeDestroyWindow(WindowPtr pWin) { DbeScreenPrivPtr pDbeScreenPriv; DbeWindowPrivPtr pDbeWindowPriv; ScreenPtr pScreen; Bool ret; /* ************************************************************************** ** 1. Unwrap the member routine. ************************************************************************** */ pScreen = pWin->drawable.pScreen; pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen); pScreen->DestroyWindow = pDbeScreenPriv->DestroyWindow; /* ************************************************************************** ** 2. Do any work necessary before the member routine is called. ** ** Call the window priv delete function for all buffer IDs associated ** with this window. ************************************************************************** */ if ((pDbeWindowPriv = DBE_WINDOW_PRIV(pWin))) { while (pDbeWindowPriv) { /* *DbeWinPrivDelete() will free the window private and set it to * NULL if there are no more buffer IDs associated with this * window. */ FreeResource(pDbeWindowPriv->IDs[0], RT_NONE); pDbeWindowPriv = DBE_WINDOW_PRIV(pWin); } } /* ************************************************************************** ** 3. Call the member routine, saving its result if necessary. ************************************************************************** */ ret = (*pScreen->DestroyWindow) (pWin); /* ************************************************************************** ** 4. Rewrap the member routine, restoring the wrapper value first in case ** the wrapper (or something that it wrapped) change this value. ************************************************************************** */ pDbeScreenPriv->DestroyWindow = pScreen->DestroyWindow; pScreen->DestroyWindow = DbeDestroyWindow; /* ************************************************************************** ** 5. Do any work necessary after the member routine has been called. ** ** In this case we do not need to do anything. ************************************************************************** */ return ret; } /* DbeDestroyWindow() */ /****************************************************************************** * * DBE DIX Procedure: DbeExtensionInit * * Description: * * Called from InitExtensions in main() * *****************************************************************************/ void DbeExtensionInit(void) { ExtensionEntry *extEntry; register int i, j; ScreenPtr pScreen = NULL; DbeScreenPrivPtr pDbeScreenPriv; int nStubbedScreens = 0; Bool ddxInitSuccess; #ifdef PANORAMIX if (!noPanoramiXExtension) return; #endif /* Create the resource types. */ dbeDrawableResType = CreateNewResourceType(DbeDrawableDelete, "dbeDrawable"); if (!dbeDrawableResType) return; dbeDrawableResType |= RC_DRAWABLE; dbeWindowPrivResType = CreateNewResourceType(DbeWindowPrivDelete, "dbeWindow"); if (!dbeWindowPrivResType) return; if (!dixRegisterPrivateKey(&dbeScreenPrivKeyRec, PRIVATE_SCREEN, 0)) return; if (!dixRegisterPrivateKey(&dbeWindowPrivKeyRec, PRIVATE_WINDOW, 0)) return; for (i = 0; i < screenInfo.numScreens; i++) { /* For each screen, set up DBE screen privates and init DIX and DDX * interface. */ pScreen = screenInfo.screens[i]; if (!(pDbeScreenPriv = malloc(sizeof(DbeScreenPrivRec)))) { /* If we can not alloc a window or screen private, * then free any privates that we already alloc'ed and return */ for (j = 0; j < i; j++) { free(dixLookupPrivate(&screenInfo.screens[j]->devPrivates, dbeScreenPrivKey)); dixSetPrivate(&screenInfo.screens[j]->devPrivates, dbeScreenPrivKey, NULL); } return; } dixSetPrivate(&pScreen->devPrivates, dbeScreenPrivKey, pDbeScreenPriv); { /* We don't have DDX support for DBE anymore */ #ifndef DISABLE_MI_DBE_BY_DEFAULT /* Setup DIX. */ pDbeScreenPriv->SetupBackgroundPainter = DbeSetupBackgroundPainter; /* Setup DDX. */ ddxInitSuccess = miDbeInit(pScreen, pDbeScreenPriv); /* DDX DBE initialization may have the side affect of * reallocating pDbeScreenPriv, so we need to update it. */ pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen); if (ddxInitSuccess) { /* Wrap DestroyWindow. The DDX initialization function * already wrapped PositionWindow for us. */ pDbeScreenPriv->DestroyWindow = pScreen->DestroyWindow; pScreen->DestroyWindow = DbeDestroyWindow; } else { /* DDX initialization failed. Stub the screen. */ DbeStubScreen(pDbeScreenPriv, &nStubbedScreens); } #else DbeStubScreen(pDbeScreenPriv, &nStubbedScreens); #endif } } /* for (i = 0; i < screenInfo.numScreens; i++) */ if (nStubbedScreens == screenInfo.numScreens) { /* All screens stubbed. Clean up and return. */ for (i = 0; i < screenInfo.numScreens; i++) { free(dixLookupPrivate(&screenInfo.screens[i]->devPrivates, dbeScreenPrivKey)); dixSetPrivate(&pScreen->devPrivates, dbeScreenPrivKey, NULL); } return; } /* Now add the extension. */ extEntry = AddExtension(DBE_PROTOCOL_NAME, DbeNumberEvents, DbeNumberErrors, ProcDbeDispatch, SProcDbeDispatch, DbeResetProc, StandardMinorOpcode); dbeErrorBase = extEntry->errorBase; SetResourceTypeErrorValue(dbeWindowPrivResType, dbeErrorBase + DbeBadBuffer); SetResourceTypeErrorValue(dbeDrawableResType, dbeErrorBase + DbeBadBuffer); } /* DbeExtensionInit() */