xorg-server-1.4/Xi/gtmotion.c

   1 /************************************************************
   2
   3 Copyright 1989, 1998  The Open Group
   4
   5 Permission to use, copy, modify, distribute, and sell this software and its
   6 documentation for any purpose is hereby granted without fee, provided that
   7 the above copyright notice appear in all copies and that both that
   8 copyright notice and this permission notice appear in supporting
   9 documentation.
  10
  11 The above copyright notice and this permission notice shall be included in
  12 all copies or substantial portions of the Software.
  13
  14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  17 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  18 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20
  21 Except as contained in this notice, the name of The Open Group shall not be
  22 used in advertising or otherwise to promote the sale, use or other dealings
  23 in this Software without prior written authorization from The Open Group.
  24
  25 Copyright 1989 by Hewlett-Packard Company, Palo Alto, California.
  26
  27                         All Rights Reserved
  28
  29 Permission to use, copy, modify, and distribute this software and its
  30 documentation for any purpose and without fee is hereby granted,
  31 provided that the above copyright notice appear in all copies and that
  32 both that copyright notice and this permission notice appear in
  33 supporting documentation, and that the name of Hewlett-Packard not be
  34 used in advertising or publicity pertaining to distribution of the
  35 software without specific, written prior permission.
  36
  37 HEWLETT-PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
  38 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
  39 HEWLETT-PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
  40 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  41 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  42 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  43 SOFTWARE.
  44
  45 ********************************************************/
  46
  47 /***********************************************************************
  48  *
  49  * Request to get the motion history from an extension device.
  50  *
  51  */
  52
  53 #define  NEED_EVENTS
  54 #define  NEED_REPLIES
  55 #ifdef HAVE_DIX_CONFIG_H
  56 #include <dix-config.h>
  57 #endif
  58
  59 #include <X11/X.h>      /* for inputstr.h    */
  60 #include <X11/Xproto.h> /* Request macro     */
  61 #include "inputstr.h"   /* DeviceIntPtr      */
  62 #include <X11/extensions/XI.h>
  63 #include <X11/extensions/XIproto.h>
  64 #include "extnsionst.h"
  65 #include "extinit.h"    /* LookupDeviceIntRec */
  66 #include "exevents.h"
  67 #include "exglobals.h"
  68
  69 #include "gtmotion.h"
  70
  71 /***********************************************************************
  72  *
  73  * Swap the request if server and client have different byte ordering.
  74  *
  75  */
  76
  77 int
  78 SProcXGetDeviceMotionEvents(ClientPtr client)
  79 {
  80     char n;
  81
  82     REQUEST(xGetDeviceMotionEventsReq);
  83     swaps(&stuff->length, n);
  84     REQUEST_SIZE_MATCH(xGetDeviceMotionEventsReq);
  85     swapl(&stuff->start, n);
  86     swapl(&stuff->stop, n);
  87     return (ProcXGetDeviceMotionEvents(client));
  88 }
  89
  90 /****************************************************************************
  91  *
  92  * Get the motion history for an extension pointer devices.
  93  *
  94  */
  95
  96 int
  97 ProcXGetDeviceMotionEvents(ClientPtr client)
  98 {
  99     INT32 *coords = NULL, *bufptr;
 100     xGetDeviceMotionEventsReply rep;
 101     unsigned long i;
 102     int num_events, axes, size = 0, tsize;
 103     unsigned long nEvents;
 104     DeviceIntPtr dev;
 105     TimeStamp start, stop;
 106     int length = 0;
 107     ValuatorClassPtr v;
 108
 109     REQUEST(xGetDeviceMotionEventsReq);
 110
 111     REQUEST_SIZE_MATCH(xGetDeviceMotionEventsReq);
 112     dev = LookupDeviceIntRec(stuff->deviceid);
 113     if (dev == NULL) {
 114         SendErrorToClient(client, IReqCode, X_GetDeviceMotionEvents, 0,
 115                           BadDevice);
 116         return Success;
 117     }
 118     v = dev->valuator;
 119     if (v == NULL || v->numAxes == 0) {
 120         SendErrorToClient(client, IReqCode, X_GetDeviceMotionEvents, 0,
 121                           BadMatch);
 122         return Success;
 123     }
 124     if (dev->valuator->motionHintWindow)
 125         MaybeStopDeviceHint(dev, client);
 126     axes = v->numAxes;
 127     rep.repType = X_Reply;
 128     rep.RepType = X_GetDeviceMotionEvents;
 129     rep.sequenceNumber = client->sequence;
 130     rep.nEvents = 0;
 131     rep.axes = axes;
 132     rep.mode = v->mode & DeviceMode;
 133     rep.length = 0;
 134     start = ClientTimeToServerTime(stuff->start);
 135     stop = ClientTimeToServerTime(stuff->stop);
 136     if (CompareTimeStamps(start, stop) == LATER ||
 137         CompareTimeStamps(start, currentTime) == LATER) {
 138         WriteReplyToClient(client, sizeof(xGetDeviceMotionEventsReply), &rep);
 139         return Success;
 140     }
 141     if (CompareTimeStamps(stop, currentTime) == LATER)
 142         stop = currentTime;
 143     num_events = v->numMotionEvents;
 144     if (num_events) {
 145         size = sizeof(Time) + (axes * sizeof(INT32));
 146         tsize = num_events * size;
 147         coords = (INT32 *) ALLOCATE_LOCAL(tsize);
 148         if (!coords) {
 149             SendErrorToClient(client, IReqCode, X_GetDeviceMotionEvents, 0,
 150                               BadAlloc);
 151             return Success;
 152         }
 153         rep.nEvents = (v->GetMotionProc) (dev, (xTimecoord *) coords,   /* XXX */
 154                                           start.milliseconds, stop.milliseconds,
 155                                           (ScreenPtr) NULL);
 156     }
 157     if (rep.nEvents > 0) {
 158         length = (rep.nEvents * size + 3) >> 2;
 159         rep.length = length;
 160     }
 161     nEvents = rep.nEvents;
 162     WriteReplyToClient(client, sizeof(xGetDeviceMotionEventsReply), &rep);
 163     if (nEvents) {
 164         if (client->swapped) {
 165             char n;
 166
 167             bufptr = coords;
 168             for (i = 0; i < nEvents * (axes + 1); i++) {
 169                 swapl(bufptr, n);
 170                 bufptr++;
 171             }
 172         }
 173         WriteToClient(client, length * 4, (char *)coords);
 174     }
 175     if (coords)
 176         DEALLOCATE_LOCAL(coords);
 177     return Success;
 178 }
 179
 180 /***********************************************************************
 181  *
 182  * This procedure writes the reply for the XGetDeviceMotionEvents function,
 183  * if the client and server have a different byte ordering.
 184  *
 185  */
 186
 187 void
 188 SRepXGetDeviceMotionEvents(ClientPtr client, int size,
 189                            xGetDeviceMotionEventsReply * rep)
 190 {
 191     char n;
 192
 193     swaps(&rep->sequenceNumber, n);
 194     swapl(&rep->length, n);
 195     swapl(&rep->nEvents, n);
 196     WriteToClient(client, size, (char *)rep);
 197 }