mbuf.c

远程桌面连接工具

    pMultibuffers->displayedMultibuffer = -1;
    if (i > 0)
	AliasMultibuffer (pMultibuffers, 0);
    pMultibuffers->updateAction = action;
    pMultibuffers->updateHint = hint;
    pMultibuffers->windowMode = MultibufferModeMono;
    pMultibuffers->lastUpdate.months = 0;
    pMultibuffers->lastUpdate.milliseconds = 0;
    pMultibuffers->width = width;
    pMultibuffers->height = height;
    pWin->devPrivates[MultibufferWindowIndex].ptr = (pointer) pMultibuffers;
    if (pClearGC) FreeScratchGC(pClearGC);
    return Success;
}

static int
ProcCreateImageBuffers (client)
    register ClientPtr	client;
{
    REQUEST(xMbufCreateImageBuffersReq);
    xMbufCreateImageBuffersReply	rep;
    register int		n;
    WindowPtr			pWin;
    XID				*ids;
    int				len, nbuf;
    int				i;
    int				err;

    REQUEST_AT_LEAST_SIZE (xMbufCreateImageBuffersReq);
    len = stuff->length - (sizeof(xMbufCreateImageBuffersReq) >> 2);
    if (len == 0)
	return BadLength;
    if (!(pWin = LookupWindow (stuff->window, client)))
	return BadWindow;
    if (pWin->drawable.class == InputOnly)
	return BadMatch;
    switch (stuff->updateAction)
    {
    case MultibufferUpdateActionUndefined:
    case MultibufferUpdateActionBackground:
    case MultibufferUpdateActionUntouched:
    case MultibufferUpdateActionCopied:
	break;
    default:
	client->errorValue = stuff->updateAction;
	return BadValue;
    }
    switch (stuff->updateHint)
    {
    case MultibufferUpdateHintFrequent:
    case MultibufferUpdateHintIntermittent:
    case MultibufferUpdateHintStatic:
	break;
    default:
	client->errorValue = stuff->updateHint;
	return BadValue;
    }
    nbuf = len;
    ids = (XID *) &stuff[1];
    for (i = 0; i < nbuf; i++)
    {
	LEGAL_NEW_RESOURCE(ids[i], client);
    }
    err = CreateImageBuffers (pWin, nbuf, ids,
			      stuff->updateAction, stuff->updateHint);
    if (err != Success)
	return err;
    rep.type = X_Reply;
    rep.length = 0;
    rep.sequenceNumber = client->sequence;
    rep.numberBuffer = ((MultibuffersPtr) (pWin->devPrivates[MultibufferWindowIndex].ptr))->numMultibuffer;
    if (client->swapped)
    {
    	swaps(&rep.sequenceNumber, n);
    	swapl(&rep.length, n);
	swaps(&rep.numberBuffer, n);
    }
    WriteToClient(client, sizeof (xMbufCreateImageBuffersReply), (char *)&rep);
    return (client->noClientException);
}

static int
ProcDisplayImageBuffers (client)
    register ClientPtr	client;
{
    REQUEST(xMbufDisplayImageBuffersReq);
    MultibufferPtr	    *pMultibuffer;
    MultibuffersPtr	    *ppMultibuffers;
    int		    nbuf;
    XID		    *ids;
    int		    i, j;
    CARD32	    minDelay;
    TimeStamp	    activateTime, bufferTime;
    
    REQUEST_AT_LEAST_SIZE (xMbufDisplayImageBuffersReq);
    nbuf = stuff->length - (sizeof (xMbufDisplayImageBuffersReq) >> 2);
    if (!nbuf)
	return Success;
    minDelay = stuff->minDelay;
    ids = (XID *) &stuff[1];
    ppMultibuffers = (MultibuffersPtr *) ALLOCATE_LOCAL(nbuf * sizeof (MultibuffersPtr));
    pMultibuffer = (MultibufferPtr *) ALLOCATE_LOCAL(nbuf * sizeof (MultibufferPtr));
    if (!ppMultibuffers || !pMultibuffer)
    {
	if (ppMultibuffers) DEALLOCATE_LOCAL(ppMultibuffers);
	if (pMultibuffer)   DEALLOCATE_LOCAL(pMultibuffer);
	client->errorValue = 0;
	return BadAlloc;
    }
    activateTime.months = 0;
    activateTime.milliseconds = 0;
    for (i = 0; i < nbuf; i++)
    {
	pMultibuffer[i] = (MultibufferPtr) LookupIDByType (ids[i], MultibufferResType);
	if (!pMultibuffer[i])
	{
	    DEALLOCATE_LOCAL(ppMultibuffers);
	    DEALLOCATE_LOCAL(pMultibuffer);
	    client->errorValue = ids[i];
	    return MultibufferErrorBase + MultibufferBadBuffer;
	}
	ppMultibuffers[i] = pMultibuffer[i]->pMultibuffers;
	for (j = 0; j < i; j++)
	{
	    if (ppMultibuffers[i] == ppMultibuffers[j])
	    {
	    	DEALLOCATE_LOCAL(ppMultibuffers);
	    	DEALLOCATE_LOCAL(pMultibuffer);
		client->errorValue = ids[i];
	    	return BadMatch;
	    }
	}
	bufferTime = ppMultibuffers[i]->lastUpdate;
	BumpTimeStamp (&bufferTime, minDelay);
	if (CompareTimeStamps (bufferTime, activateTime) == LATER)
	    activateTime = bufferTime;
    }
    UpdateCurrentTime ();
    if (CompareTimeStamps (activateTime, currentTime) == LATER &&
	QueueDisplayRequest (client, activateTime))
    {
	;
    }
    else
	PerformDisplayRequest (ppMultibuffers, pMultibuffer, nbuf);
    DEALLOCATE_LOCAL(ppMultibuffers);
    DEALLOCATE_LOCAL(pMultibuffer);
    return Success;
}

static int
ProcDestroyImageBuffers (client)
    register ClientPtr	client;
{
    REQUEST (xMbufDestroyImageBuffersReq);
    WindowPtr	pWin;

    REQUEST_SIZE_MATCH (xMbufDestroyImageBuffersReq);
    if (!(pWin = LookupWindow (stuff->window, client)))
	return BadWindow;
    DestroyImageBuffers (pWin);
    return Success;
}

static int
ProcSetMBufferAttributes (client)
    register ClientPtr	client;
{
    REQUEST (xMbufSetMBufferAttributesReq);
    WindowPtr	pWin;
    MultibuffersPtr	pMultibuffers;
    int		len;
    Mask	vmask;
    Mask	index2;
    CARD32	updateHint;
    XID		*vlist;

    REQUEST_AT_LEAST_SIZE (xMbufSetMBufferAttributesReq);
    pWin = LookupWindow (stuff->window, client);
    if (!pWin)
	return BadWindow;
    pMultibuffers = (MultibuffersPtr)LookupIDByType (pWin->drawable.id, MultibuffersResType);
    if (!pMultibuffers)
	return BadMatch;
    len = stuff->length - (sizeof (xMbufSetMBufferAttributesReq) >> 2);
    vmask = stuff->valueMask;
    if (len != Ones (vmask))
	return BadLength;
    vlist = (XID *) &stuff[1];
    while (vmask)
    {
	index2 = (Mask) lowbit (vmask);
	vmask &= ~index2;
	switch (index2)
	{
	case MultibufferWindowUpdateHint:
	    updateHint = (CARD32) *vlist;
	    switch (updateHint)
	    {
	    case MultibufferUpdateHintFrequent:
	    case MultibufferUpdateHintIntermittent:
	    case MultibufferUpdateHintStatic:
		pMultibuffers->updateHint = updateHint;
		break;
	    default:
		client->errorValue = updateHint;
		return BadValue;
	    }
	    vlist++;
	    break;
	default:
	    client->errorValue = stuff->valueMask;
	    return BadValue;
	}
    }
    return Success;
}

static int
ProcGetMBufferAttributes (client)
    ClientPtr	client;
{
    REQUEST (xMbufGetMBufferAttributesReq);
    WindowPtr	pWin;
    MultibuffersPtr	pMultibuffers;
    XID		*ids;
    xMbufGetMBufferAttributesReply  rep;
    int		i, n;

    REQUEST_SIZE_MATCH (xMbufGetMBufferAttributesReq);
    pWin = LookupWindow (stuff->window, client);
    if (!pWin)
	return BadWindow;
    pMultibuffers = (MultibuffersPtr)LookupIDByType (pWin->drawable.id, MultibuffersResType);
    if (!pMultibuffers)
	return BadAccess;
    ids = (XID *) ALLOCATE_LOCAL (pMultibuffers->numMultibuffer * sizeof (XID));
    if (!ids)
	return BadAlloc;
    for (i = 0; i < pMultibuffers->numMultibuffer; i++)
	ids[i] = pMultibuffers->buffers[i].pPixmap->drawable.id;
    rep.type = X_Reply;
    rep.sequenceNumber = client->sequence;
    rep.length = pMultibuffers->numMultibuffer;
    rep.displayedBuffer = pMultibuffers->displayedMultibuffer;
    rep.updateAction = pMultibuffers->updateAction;
    rep.updateHint = pMultibuffers->updateHint;
    rep.windowMode = pMultibuffers->windowMode;
    if (client->swapped)
    {
    	swaps(&rep.sequenceNumber, n);
    	swapl(&rep.length, n);
	swaps(&rep.displayedBuffer, n);
	SwapLongs (ids, pMultibuffers->numMultibuffer);
    }
    WriteToClient (client, sizeof(xMbufGetMBufferAttributesReply),
		   (char *)&rep);
    WriteToClient (client, (int)(pMultibuffers->numMultibuffer * sizeof (XID)),
		   (char *)ids);
    DEALLOCATE_LOCAL((pointer) ids);
    return client->noClientException;
}

static int
ProcSetBufferAttributes (client)
    register ClientPtr	client;
{
    REQUEST(xMbufSetBufferAttributesReq);
    MultibufferPtr	pMultibuffer;
    int		len;
    Mask	vmask, index2;
    XID		*vlist;
    Mask	eventMask;
    int		result;

    REQUEST_AT_LEAST_SIZE (xMbufSetBufferAttributesReq);
    pMultibuffer = (MultibufferPtr) LookupIDByType (stuff->buffer, MultibufferResType);
    if (!pMultibuffer)
	return MultibufferErrorBase + MultibufferBadBuffer;
    len = stuff->length - (sizeof (xMbufSetBufferAttributesReq) >> 2);
    vmask = stuff->valueMask;
    if (len != Ones (vmask))
	return BadLength;
    vlist = (XID *) &stuff[1];
    while (vmask)
    {
	index2 = (Mask) lowbit (vmask);
	vmask &= ~index2;
	switch (index2)
	{
	case MultibufferBufferEventMask:
	    eventMask = (Mask) *vlist;
	    vlist++;
	    result = EventSelectForMultibuffer (pMultibuffer, client, eventMask);
	    if (result != Success)
		return result;
	    break;
	default:
	    client->errorValue = stuff->valueMask;
	    return BadValue;
	}
    }
    return Success;
}

int
ProcGetBufferAttributes (client)
    register ClientPtr	client;
{
    REQUEST(xMbufGetBufferAttributesReq);
    MultibufferPtr	pMultibuffer;
    xMbufGetBufferAttributesReply	rep;
    OtherClientsPtr		other;
    int				n;

    REQUEST_SIZE_MATCH (xMbufGetBufferAttributesReq);
    pMultibuffer = (MultibufferPtr) LookupIDByType (stuff->buffer, MultibufferResType);
    if (!pMultibuffer)
	return MultibufferErrorBase + MultibufferBadBuffer;
    rep.type = X_Reply;
    rep.sequenceNumber = client->sequence;
    rep.length = 0;
    rep.window = pMultibuffer->pMultibuffers->pWindow->drawable.id;
    if (bClient (pMultibuffer) == client)
	rep.eventMask = pMultibuffer->eventMask;
    else
    {
	rep.eventMask = (Mask) 0L;
	for (other = pMultibuffer->otherClients; other; other = other->next)
	    if (SameClient (other, client))
	    {
		rep.eventMask = other->mask;
		break;
	    }
    }
    rep.bufferIndex = pMultibuffer->number;
    rep.side = pMultibuffer->side;
    if (client->swapped)
    {
    	swaps(&rep.sequenceNumber, n);
    	swapl(&rep.length, n);
	swapl(&rep.window, n);
	swapl(&rep.eventMask, n);
	swaps(&rep.bufferIndex, n);
    }
    WriteToClient(client, sizeof (xMbufGetBufferAttributesReply), (char *)&rep);
    return (client->noClientException);
}

static int
ProcGetBufferInfo (client)
    register ClientPtr	client;
{
    REQUEST (xMbufGetBufferInfoReq);
    DrawablePtr		    pDrawable;
    xMbufGetBufferInfoReply rep;
    ScreenPtr		    pScreen;
    int			    i, j, k;
    int			    n;
    xMbufBufferInfo	    *pInfo;
    int			    nInfo;
    DepthPtr		    pDepth;

    pDrawable = (DrawablePtr) LookupDrawable (stuff->drawable, client);
    if (!pDrawable)
	return BadDrawable;
    pScreen = pDrawable->pScreen;
    nInfo = 0;
    for (i = 0; i < pScreen->numDepths; i++)
    {
	pDepth = &pScreen->allowedDepths[i];
	nInfo += pDepth->numVids;
    }
    pInfo = (xMbufBufferInfo *)
		ALLOCATE_LOCAL (nInfo * sizeof (xMbufBufferInfo));
    if (!pInfo)
	return BadAlloc;

    rep.type = X_Reply;
    rep.sequenceNumber = client->sequence;
    rep.length = nInfo * (sizeof (xMbufBufferInfo) >> 2);
    rep.normalInfo = nInfo;
    rep.stereoInfo = 0;
    if (client->swapped)
    {
	swaps(&rep.sequenceNumber, n);
	swapl(&rep.length, n);
	swaps(&rep.normalInfo, n);
	swaps(&rep.stereoInfo, n);
    }

    k = 0;
    for (i = 0; i < pScreen->numDepths; i++)
    {
	pDepth = &pScreen->allowedDepths[i];
	for (j = 0; j < pDepth->numVids; j++)
	{
	    pInfo[k].visualID = pDepth->vids[j];
	    pInfo[k].maxBuffers = 0;
	    pInfo[k].depth = pDepth->depth;
	    if (client->swapped)
	    {
		swapl (&pInfo[k].visualID, n);
		swaps (&pInfo[k].maxBuffers, n);
	    }
	    k++;
	}
    }
    WriteToClient (client, sizeof (xMbufGetBufferInfoReply), (pointer) &rep);
    WriteToClient (client, (int) nInfo * sizeof (xMbufBufferInfo), (pointer) pInfo);
    DEALLOCATE_LOCAL ((pointer) pInfo);
    return client->noClientException;
}

static int
ProcClearImageBufferArea (client)
    register ClientPtr	client;
{
    REQUEST (xMbufClearImageBufferAreaReq);
    MultibufferPtr	pMultibuffer;
    WindowPtr pWin;
    xRectangle clearRect;
    int width, height;
    DrawablePtr pDrawable;
    ScreenPtr pScreen;

    REQUEST_SIZE_MATCH (xMbufClearImageBufferAreaReq);
    pMultibuffer = (MultibufferPtr) LookupIDByType (stuff->buffer, MultibufferResType);
    if (!pMultibuffer)
	return MultibufferErrorBase + MultibufferBadBuffer;
    if ((stuff->exposures != xTrue) && (stuff->exposures != xFalse))
    {
	client->errorValue = stuff->exposures;
        return(BadValue);
    }
    pWin = pMultibuffer->pMultibuffers->pWindow;
    width  = pWin->drawable.width;
    height = pWin->drawable.height;
    pScreen = pWin->drawable.pScreen;

    clearRect.x = stuff->x;
    clearRect.y = stuff->y;
    clearRect.width  = stuff->width  ? stuff->width  : width;
    clearRect.height = stuff->height ? stuff->height : height;

    if (pWin->backgroundState != None)
    {
	GCPtr pClearGC;
	pClearGC = GetScratchGC (pWin->drawable.depth, pScreen);
	SetupBackgroundPainter (pWin, pClearGC);

	if (pMultibuffer->number == pMultibuffer->pMultibuffers->displayedMultibuffer)