xref: /xsrc/external/mit/xorg-server/dist/Xi/gtmotion.c

/************************************************************

Copyright 1989, 1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
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in this Software without prior written authorization from The Open Group.

Copyright 1989 by Hewlett-Packard Company, Palo Alto, California.

			All Rights Reserved

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
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 Hewlett-Packard not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.

HEWLETT-PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
HEWLETT-PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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********************************************************/

/***********************************************************************
 *
 * Request to get the motion history from an extension device.
 *
 */

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

#include "inputstr.h"	/* DeviceIntPtr      */
#include <X11/extensions/XI.h>
#include <X11/extensions/XIproto.h>
#include "exevents.h"
#include "exglobals.h"

#include "gtmotion.h"

/***********************************************************************
 *
 * Swap the request if server and client have different byte ordering.
 *
 */

int
SProcXGetDeviceMotionEvents(ClientPtr client)
{
    char n;

    REQUEST(xGetDeviceMotionEventsReq);
    swaps(&stuff->length, n);
    REQUEST_SIZE_MATCH(xGetDeviceMotionEventsReq);
    swapl(&stuff->start, n);
    swapl(&stuff->stop, n);
    return (ProcXGetDeviceMotionEvents(client));
}

/****************************************************************************
 *
 * Get the motion history for an extension pointer devices.
 *
 */

int
ProcXGetDeviceMotionEvents(ClientPtr client)
{
    INT32 *coords = NULL, *bufptr;
    xGetDeviceMotionEventsReply rep;
    unsigned long i;
    int rc, num_events, axes, size = 0;
    unsigned long nEvents;
    DeviceIntPtr dev;
    TimeStamp start, stop;
    int length = 0;
    ValuatorClassPtr v;

    REQUEST(xGetDeviceMotionEventsReq);

    REQUEST_SIZE_MATCH(xGetDeviceMotionEventsReq);
    rc = dixLookupDevice(&dev, stuff->deviceid, client, DixReadAccess);
    if (rc != Success)
	return rc;
    v = dev->valuator;
    if (v == NULL || v->numAxes == 0)
	return BadMatch;
    if (dev->valuator->motionHintWindow)
	MaybeStopDeviceHint(dev, client);
    axes = v->numAxes;
    rep.repType = X_Reply;
    rep.RepType = X_GetDeviceMotionEvents;
    rep.sequenceNumber = client->sequence;
    rep.nEvents = 0;
    rep.axes = axes;
    rep.mode = Absolute; /* XXX we don't do relative at the moment */
    rep.length = 0;
    start = ClientTimeToServerTime(stuff->start);
    stop = ClientTimeToServerTime(stuff->stop);
    if (CompareTimeStamps(start, stop) == LATER ||
	CompareTimeStamps(start, currentTime) == LATER) {
	WriteReplyToClient(client, sizeof(xGetDeviceMotionEventsReply), &rep);
	return Success;
    }
    if (CompareTimeStamps(stop, currentTime) == LATER)
	stop = currentTime;
    num_events = v->numMotionEvents;
    if (num_events) {
        size = sizeof(Time) + (axes * sizeof(INT32));
	rep.nEvents = GetMotionHistory(dev, (xTimecoord **) &coords,/* XXX */
					start.milliseconds, stop.milliseconds,
					(ScreenPtr) NULL, FALSE);
    }
    if (rep.nEvents > 0) {
	length = (rep.nEvents * size + 3) >> 2;
	rep.length = length;
    }
    nEvents = rep.nEvents;
    WriteReplyToClient(client, sizeof(xGetDeviceMotionEventsReply), &rep);
    if (nEvents) {
	if (client->swapped) {
	    char n;

	    bufptr = coords;
	    for (i = 0; i < nEvents * (axes + 1); i++) {
		swapl(bufptr, n);
		bufptr++;
	    }
	}
	WriteToClient(client, length * 4, (char *)coords);
    }
    if (coords)
	xfree(coords);
    return Success;
}

/***********************************************************************
 *
 * This procedure writes the reply for the XGetDeviceMotionEvents function,
 * if the client and server have a different byte ordering.
 *
 */

void
SRepXGetDeviceMotionEvents(ClientPtr client, int size,
			   xGetDeviceMotionEventsReply * rep)
{
    char n;

    swaps(&rep->sequenceNumber, n);
    swapl(&rep->length, n);
    swapl(&rep->nEvents, n);
    WriteToClient(client, size, (char *)rep);
}