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- /* $Header: xgtmotion.c,v 1.10 91/07/17 16:38:25 rws Exp $ */
-
- /************************************************************
- Copyright (c) 1989 by Hewlett-Packard Company, Palo Alto, California, and the
- Massachusetts Institute of Technology, Cambridge, Massachusetts.
-
- 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 names of Hewlett-Packard or MIT 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
- 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.
-
- ********************************************************/
-
- /***********************************************************************
- *
- * Request to get the motion history from an extension device.
- *
- */
-
- #define NEED_EVENTS
- #define NEED_REPLIES
- #include "X.h" /* for inputstr.h */
- #include "Xproto.h" /* Request macro */
- #include "inputstr.h" /* DeviceIntPtr */
- #include "XI.h"
- #include "XIproto.h"
-
- extern int IReqCode;
- extern int BadDevice;
- extern void (* ReplySwapVector[256]) ();
- DeviceIntPtr LookupDeviceIntRec();
-
- /***********************************************************************
- *
- * Swap the request if server and client have different byte ordering.
- *
- */
-
- int
- SProcXGetDeviceMotionEvents(client)
- register ClientPtr client;
- {
- register char n;
-
- REQUEST(xGetDeviceMotionEventsReq);
- swaps(&stuff->length, n);
- swapl(&stuff->start, n);
- swapl(&stuff->stop, n);
- return(ProcXGetDeviceMotionEvents(client));
- }
-
- /****************************************************************************
- *
- * Get the motion history for an extension pointer devices.
- *
- */
-
- int
- ProcXGetDeviceMotionEvents(client)
- ClientPtr client;
- {
- INT32 *coords, *bufptr;
- xGetDeviceMotionEventsReply rep;
- int i, j, num_events, axes, size, tsize;
- unsigned long nEvents;
- DeviceIntPtr dev;
- TimeStamp start, stop;
- void XSwapTimeCoordWrite();
- int length = 0;
- ValuatorClassPtr v;
-
- REQUEST(xGetDeviceMotionEventsReq);
-
- REQUEST_SIZE_MATCH(xGetDeviceMotionEventsReq);
- dev = LookupDeviceIntRec (stuff->deviceid);
- if (dev == NULL)
- {
- SendErrorToClient(client, IReqCode, X_GetDeviceMotionEvents, 0,
- BadDevice);
- return Success;
- }
- v = dev->valuator;
- if (v==NULL || v->numAxes == 0)
- {
- SendErrorToClient(client, IReqCode, X_GetDeviceMotionEvents, 0,
- BadMatch);
- return Success;
- }
- 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 = v->mode & DeviceMode;
- 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));
- tsize = num_events * size;
- coords = (INT32 *) xalloc (tsize);
- rep.nEvents = (v->GetMotionProc) (
- dev, coords, start.milliseconds, stop.milliseconds);
-
- }
- if (rep.nEvents > 0)
- {
- length = (rep.nEvents * size +3) / 4;
- rep.length = length;
- }
- nEvents = rep.nEvents;
- WriteReplyToClient(client, sizeof(xGetDeviceMotionEventsReply), &rep);
- if (nEvents)
- {
- if (client->swapped)
- {
- register char n;
-
- bufptr = coords;
- for (i=0; i<nEvents * (axes+1); i++)
- {
- swapl(bufptr, n);
- bufptr++;
- }
- }
- WriteToClient(client, length * 4, coords);
- }
- xfree(coords);
- return Success;
- }
-
- /***********************************************************************
- *
- * This procedure writes the reply for the XGetDeviceMotionEvents function,
- * if the client and server have a different byte ordering.
- *
- */
-
- SRepXGetDeviceMotionEvents (client, size, rep)
- ClientPtr client;
- int size;
- xGetDeviceMotionEventsReply *rep;
- {
- register char n;
-
- swaps(&rep->sequenceNumber, n);
- swapl(&rep->length, n);
- swapl(&rep->nEvents, n);
- WriteToClient(client, size, rep);
- }
-