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dbe.c
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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);