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* Copyright 2002-2003 Red Hat Inc., Durham, North Carolina.
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation on the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* Rickard E. (Rik) Faith <faith@redhat.com>
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* This file provides functions similar to miPointerGetMotionEvents and
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* miPointerPutMotionEvents, with the exception that devices with more
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* than two axes are fully supported. These routines may be used only
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* for motion buffers for extension devices, and are \a not compatible
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* replacements for the mi routines. */
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#ifdef HAVE_DMX_CONFIG_H
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#include <dmx-config.h>
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#include "dmxinputinit.h"
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#include "dmxcommon.h"
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#include "dmxmotion.h"
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#define OFFSET(offset,element) ((offset) * (numAxes + 1) + (element))
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/** Return size of motion buffer. \see DMX_MOTION_SIZE */
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int dmxPointerGetMotionBufferSize(void)
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return DMX_MOTION_SIZE;
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/** This routine performs the same function as \a miPointerGetMotionEvents:
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* the events in the motion history that are between the start and stop
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* times (in mS) are placed in the coords vector, and the count of the
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* number of items so placed is returned. This routine is called from
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* dix/devices.c so that coords can hold valuator->numMotionEvents
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* events. This routine is called from \a Xi/gtmotion.c with coords large
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* enough to hold the same number of events in a variable-length
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* extended \a xTimecoord structure. This provides sufficient data for the
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* \a XGetDeviceMotionEvents library call, and would be identical to
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* \a miPointerGetMotionEvents for devices with only 2 axes (i.e., core
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* pointers) if \a xTimecoord used 32bit integers.
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* Because DMX uses the mi* routines for all core devices, this routine
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* only has to support extension devices using the polymorphic coords.
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* Because compatibility with miPointerGetMotionEvents is not possible,
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* it is not provided. */
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int dmxPointerGetMotionEvents(DeviceIntPtr pDevice,
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GETDMXLOCALFROMPDEVICE;
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int numAxes = pDevice->valuator->numAxes;
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unsigned long *c = (unsigned long *)coords;
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if (!dmxLocal->history) return 0;
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for (i = dmxLocal->head; i != dmxLocal->tail;) {
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if (dmxLocal->history[OFFSET(i,0)] >= stop) break;
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if (dmxLocal->history[OFFSET(i,0)] >= start) {
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for (j = 0; j < numAxes + 1; j++)
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c[OFFSET(count,j)] = dmxLocal->history[OFFSET(i,j)];
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if (++i >= DMX_MOTION_SIZE) i = 0;
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/** This routine adds an event to the motion history. A similar
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* function is performed by miPointerMove for the mi versions of these
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void dmxPointerPutMotionEvent(DeviceIntPtr pDevice,
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int firstAxis, int axesCount, int *v,
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GETDMXLOCALFROMPDEVICE;
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int numAxes = pDevice->valuator->numAxes;
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if (!dmxLocal->history) {
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dmxLocal->history = xalloc(sizeof(*dmxLocal->history)
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dmxLocal->valuators = xalloc(sizeof(*dmxLocal->valuators) * numAxes);
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memset(dmxLocal->valuators, 0, sizeof(*dmxLocal->valuators) * numAxes);
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if (++dmxLocal->tail >= DMX_MOTION_SIZE) dmxLocal->tail = 0;
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if (dmxLocal->head == dmxLocal->tail)
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if (++dmxLocal->head >= DMX_MOTION_SIZE) dmxLocal->head = 0;
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dmxLocal->history[OFFSET(dmxLocal->tail,0)] = time;
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/* Initialize the data from the known
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* values (if Absolute) or to zero (if
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if (pDevice->valuator->mode == Absolute) {
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for (i = 0; i < numAxes; i++)
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dmxLocal->history[OFFSET(dmxLocal->tail,i+1)]
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= dmxLocal->valuators[i];
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for (i = 0; i < numAxes; i++)
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dmxLocal->history[OFFSET(dmxLocal->tail,i+1)] = 0;
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for (i = firstAxis; i < axesCount; i++) {
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dmxLocal->history[OFFSET(dmxLocal->tail,i+i)]
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= (unsigned long)v[i-firstAxis];
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dmxLocal->valuators[i] = v[i-firstAxis];