TinyX/xfixes/xfixes.c

/*
 * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
 * Copyright 2010 Red Hat, Inc.
 *
 * 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 (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS 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.
 *
 * Copyright © 2002 Keith Packard
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of Keith Packard not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Keith Packard makes no
 * representations about the suitability of this software for any purpose.  It
 * is provided "as is" without express or implied warranty.
 *
 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include "xfixesint.h"

/*
 * Must use these instead of the constants from xfixeswire.h.  They advertise
 * what we implement, not what the protocol headers define.
 */
#define SERVER_XFIXES_MAJOR 4
#define SERVER_XFIXES_MINOR 0

unsigned char XFixesReqCode;

int XFixesEventBase;

int XFixesErrorBase;

int XFixesClientPrivateIndex;

static int
ProcXFixesQueryVersion(ClientPtr client)
{
    XFixesClientPtr pXFixesClient = GetXFixesClient(client);

    xXFixesQueryVersionReply rep;


    REQUEST(xXFixesQueryVersionReq);

    REQUEST_SIZE_MATCH(xXFixesQueryVersionReq);
    rep.type = X_Reply;
    rep.length = 0;
    rep.sequenceNumber = client->sequence;
    if (stuff->majorVersion < SERVER_XFIXES_MAJOR) {
        rep.majorVersion = stuff->majorVersion;
        rep.minorVersion = stuff->minorVersion;
    }
    else {
        rep.majorVersion = SERVER_XFIXES_MAJOR;
        if (stuff->majorVersion == SERVER_XFIXES_MAJOR &&
            stuff->minorVersion < SERVER_XFIXES_MINOR)
            rep.minorVersion = stuff->minorVersion;
        else
            rep.minorVersion = SERVER_XFIXES_MINOR;
    }
    pXFixesClient->major_version = rep.majorVersion;
    pXFixesClient->minor_version = rep.minorVersion;
    if (client->swapped) {
        swaps(&rep.sequenceNumber);
        swapl(&rep.length);
        swapl(&rep.majorVersion);
        swapl(&rep.minorVersion);
    }
    WriteToClient(client, sizeof(xXFixesQueryVersionReply), (char *) &rep);
    return (client->noClientException);
}

/* Major version controls available requests */
static const int version_requests[] = {
    X_XFixesQueryVersion,       /* before client sends QueryVersion */
    X_XFixesGetCursorImage,     /* Version 1 */
    X_XFixesChangeCursorByName, /* Version 2 */
    X_XFixesExpandRegion,       /* Version 3 */
    X_XFixesShowCursor,         /* Version 4 */
};

#define NUM_VERSION_REQUESTS	(sizeof (version_requests) / sizeof (version_requests[0]))

int (*ProcXFixesVector[XFixesNumberRequests]) (ClientPtr) = {
/*************** Version 1 ******************/
    ProcXFixesQueryVersion,
        ProcXFixesChangeSaveSet,
        ProcXFixesSelectSelectionInput,
        ProcXFixesSelectCursorInput, ProcXFixesGetCursorImage,
/*************** Version 2 ******************/
        ProcXFixesCreateRegion,
        ProcXFixesCreateRegionFromBitmap,
        ProcXFixesCreateRegionFromWindow,
        ProcXFixesCreateRegionFromGC,
        ProcXFixesCreateRegionFromPicture,
        ProcXFixesDestroyRegion,
        ProcXFixesSetRegion,
        ProcXFixesCopyRegion,
        ProcXFixesCombineRegion,
        ProcXFixesCombineRegion,
        ProcXFixesCombineRegion,
        ProcXFixesInvertRegion,
        ProcXFixesTranslateRegion,
        ProcXFixesRegionExtents,
        ProcXFixesFetchRegion,
        ProcXFixesSetGCClipRegion,
        ProcXFixesSetWindowShapeRegion,
        ProcXFixesSetPictureClipRegion,
        ProcXFixesSetCursorName,
        ProcXFixesGetCursorName,
        ProcXFixesGetCursorImageAndName,
        ProcXFixesChangeCursor, ProcXFixesChangeCursorByName,
/*************** Version 3 ******************/
        ProcXFixesExpandRegion,
/*************** Version 4 ****************/
ProcXFixesHideCursor, ProcXFixesShowCursor,};

static int
ProcXFixesDispatch(ClientPtr client)
{
    REQUEST(xXFixesReq);
    XFixesClientPtr pXFixesClient = GetXFixesClient(client);

    if (pXFixesClient->major_version >= NUM_VERSION_REQUESTS)
        return BadRequest;
    if (stuff->xfixesReqType > version_requests[pXFixesClient->major_version])
        return BadRequest;
    return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
}

static int
SProcXFixesQueryVersion(ClientPtr client)
{

    REQUEST(xXFixesQueryVersionReq);

    swaps(&stuff->length);
    swapl(&stuff->majorVersion);
    swapl(&stuff->minorVersion);
    return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
}

int (*SProcXFixesVector[XFixesNumberRequests]) (ClientPtr) = {
/*************** Version 1 ******************/
    SProcXFixesQueryVersion,
        SProcXFixesChangeSaveSet,
        SProcXFixesSelectSelectionInput,
        SProcXFixesSelectCursorInput, SProcXFixesGetCursorImage,
/*************** Version 2 ******************/
        SProcXFixesCreateRegion,
        SProcXFixesCreateRegionFromBitmap,
        SProcXFixesCreateRegionFromWindow,
        SProcXFixesCreateRegionFromGC,
        SProcXFixesCreateRegionFromPicture,
        SProcXFixesDestroyRegion,
        SProcXFixesSetRegion,
        SProcXFixesCopyRegion,
        SProcXFixesCombineRegion,
        SProcXFixesCombineRegion,
        SProcXFixesCombineRegion,
        SProcXFixesInvertRegion,
        SProcXFixesTranslateRegion,
        SProcXFixesRegionExtents,
        SProcXFixesFetchRegion,
        SProcXFixesSetGCClipRegion,
        SProcXFixesSetWindowShapeRegion,
        SProcXFixesSetPictureClipRegion,
        SProcXFixesSetCursorName,
        SProcXFixesGetCursorName,
        SProcXFixesGetCursorImageAndName,
        SProcXFixesChangeCursor, SProcXFixesChangeCursorByName,
/*************** Version 3 ******************/
        SProcXFixesExpandRegion,
/*************** Version 4 ****************/
SProcXFixesHideCursor, SProcXFixesShowCursor,};

static int
SProcXFixesDispatch(ClientPtr client)
{
    REQUEST(xXFixesReq);
    if (stuff->xfixesReqType >= XFixesNumberRequests)
        return BadRequest;
    return (*SProcXFixesVector[stuff->xfixesReqType]) (client);
}

static void
XFixesClientCallback(CallbackListPtr *list, pointer closure, pointer data)
{
    NewClientInfoRec *clientinfo = (NewClientInfoRec *) data;
    ClientPtr pClient = clientinfo->client;
    XFixesClientPtr pXFixesClient = GetXFixesClient(pClient);

    pXFixesClient->major_version = 0;
    pXFixesClient->minor_version = 0;
}

 /*ARGSUSED*/ static void
XFixesResetProc(ExtensionEntry * extEntry)
{
    DeleteCallback(&ClientStateCallback, XFixesClientCallback, 0);
}

void
XFixesExtensionInit(void)
{
    ExtensionEntry *extEntry;

    XFixesClientPrivateIndex = AllocateClientPrivateIndex();
    if (!AllocateClientPrivate(XFixesClientPrivateIndex,
                               sizeof(XFixesClientRec)))
        return;
    if (!AddCallback(&ClientStateCallback, XFixesClientCallback, 0))
        return;

    if (XFixesSelectionInit() && XFixesCursorInit() && XFixesRegionInit() &&
        (extEntry = AddExtension(XFIXES_NAME, XFixesNumberEvents,
                                 XFixesNumberErrors,
                                 ProcXFixesDispatch, SProcXFixesDispatch,
                                 XFixesResetProc, StandardMinorOpcode)) != 0) {
        XFixesReqCode = (unsigned char) extEntry->base;
        XFixesEventBase = extEntry->eventBase;
        XFixesErrorBase = extEntry->errorBase;
        EventSwapVector[XFixesEventBase + XFixesSelectionNotify] =
            (EventSwapPtr) SXFixesSelectionNotifyEvent;
        EventSwapVector[XFixesEventBase + XFixesCursorNotify] =
            (EventSwapPtr) SXFixesCursorNotifyEvent;
    }
}