| 1 | /* |
| 2 | * Copyright 2002-2003 Red Hat Inc., Durham, North Carolina. |
| 3 | * |
| 4 | * All Rights Reserved. |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining |
| 7 | * a copy of this software and associated documentation files (the |
| 8 | * "Software"), to deal in the Software without restriction, including |
| 9 | * without limitation on the rights to use, copy, modify, merge, |
| 10 | * publish, distribute, sublicense, and/or sell copies of the Software, |
| 11 | * and to permit persons to whom the Software is furnished to do so, |
| 12 | * subject to the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice (including the |
| 15 | * next paragraph) shall be included in all copies or substantial |
| 16 | * portions of the Software. |
| 17 | * |
| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 19 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 20 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 21 | * NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS |
| 22 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 23 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 24 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 25 | * SOFTWARE. |
| 26 | */ |
| 27 | |
| 28 | /* |
| 29 | * Authors: |
| 30 | * Rickard E. (Rik) Faith <faith@redhat.com> |
| 31 | * |
| 32 | */ |
| 33 | |
| 34 | /** \file |
| 35 | * This file provides functions similar to miPointerGetMotionEvents and |
| 36 | * miPointerPutMotionEvents, with the exception that devices with more |
| 37 | * than two axes are fully supported. These routines may be used only |
| 38 | * for motion buffers for extension devices, and are \a not compatible |
| 39 | * replacements for the mi routines. */ |
| 40 | |
| 41 | #ifdef HAVE_DMX_CONFIG_H |
| 42 | #include <dmx-config.h> |
| 43 | #endif |
| 44 | |
| 45 | #include "inputstr.h" |
| 46 | #include "dmxinputinit.h" |
| 47 | #include "dmxcommon.h" |
| 48 | #include "dmxmotion.h" |
| 49 | |
| 50 | #define OFFSET(offset,element) ((offset) * (numAxes + 1) + (element)) |
| 51 | |
| 52 | /** Return size of motion buffer. \see DMX_MOTION_SIZE */ |
| 53 | int |
| 54 | dmxPointerGetMotionBufferSize(void) |
| 55 | { |
| 56 | return DMX_MOTION_SIZE; |
| 57 | } |
| 58 | |
| 59 | /** This routine performs the same function as \a miPointerGetMotionEvents: |
| 60 | * the events in the motion history that are between the start and stop |
| 61 | * times (in mS) are placed in the coords vector, and the count of the |
| 62 | * number of items so placed is returned. This routine is called from |
| 63 | * dix/devices.c so that coords can hold valuator->numMotionEvents |
| 64 | * events. This routine is called from \a Xi/gtmotion.c with coords large |
| 65 | * enough to hold the same number of events in a variable-length |
| 66 | * extended \a xTimecoord structure. This provides sufficient data for the |
| 67 | * \a XGetDeviceMotionEvents library call, and would be identical to |
| 68 | * \a miPointerGetMotionEvents for devices with only 2 axes (i.e., core |
| 69 | * pointers) if \a xTimecoord used 32bit integers. |
| 70 | * |
| 71 | * Because DMX uses the mi* routines for all core devices, this routine |
| 72 | * only has to support extension devices using the polymorphic coords. |
| 73 | * Because compatibility with miPointerGetMotionEvents is not possible, |
| 74 | * it is not provided. */ |
| 75 | int |
| 76 | dmxPointerGetMotionEvents(DeviceIntPtr pDevice, |
| 77 | xTimecoord * coords, |
| 78 | unsigned long start, |
| 79 | unsigned long stop, ScreenPtr pScreen) |
| 80 | { |
| 81 | GETDMXLOCALFROMPDEVICE; |
| 82 | int numAxes = pDevice->valuator->numAxes; |
| 83 | unsigned long *c = (unsigned long *) coords; |
| 84 | int count = 0; |
| 85 | int i, j; |
| 86 | |
| 87 | if (!dmxLocal->history) |
| 88 | return 0; |
| 89 | for (i = dmxLocal->head; i != dmxLocal->tail;) { |
| 90 | if (dmxLocal->history[OFFSET(i, 0)] >= stop) |
| 91 | break; |
| 92 | if (dmxLocal->history[OFFSET(i, 0)] >= start) { |
| 93 | for (j = 0; j < numAxes + 1; j++) |
| 94 | c[OFFSET(count, j)] = dmxLocal->history[OFFSET(i, j)]; |
| 95 | ++count; |
| 96 | } |
| 97 | if (++i >= DMX_MOTION_SIZE) |
| 98 | i = 0; |
| 99 | } |
| 100 | return count; |
| 101 | } |
| 102 | |
| 103 | /** This routine adds an event to the motion history. A similar |
| 104 | * function is performed by miPointerMove for the mi versions of these |
| 105 | * routines. */ |
| 106 | void |
| 107 | dmxPointerPutMotionEvent(DeviceIntPtr pDevice, |
| 108 | int firstAxis, int axesCount, int *v, |
| 109 | unsigned long time) |
| 110 | { |
| 111 | GETDMXLOCALFROMPDEVICE; |
| 112 | int numAxes = pDevice->valuator->numAxes; |
| 113 | int i; |
| 114 | |
| 115 | if (!dmxLocal->history) { |
| 116 | dmxLocal->history = malloc(sizeof(*dmxLocal->history) |
| 117 | * (numAxes + 1) |
| 118 | * DMX_MOTION_SIZE); |
| 119 | dmxLocal->head = 0; |
| 120 | dmxLocal->tail = 0; |
| 121 | dmxLocal->valuators = calloc(sizeof(*dmxLocal->valuators), numAxes); |
| 122 | } |
| 123 | else { |
| 124 | if (++dmxLocal->tail >= DMX_MOTION_SIZE) |
| 125 | dmxLocal->tail = 0; |
| 126 | if (dmxLocal->head == dmxLocal->tail) |
| 127 | if (++dmxLocal->head >= DMX_MOTION_SIZE) |
| 128 | dmxLocal->head = 0; |
| 129 | } |
| 130 | |
| 131 | dmxLocal->history[OFFSET(dmxLocal->tail, 0)] = time; |
| 132 | |
| 133 | /* Initialize the data from the known |
| 134 | * values (if Absolute) or to zero (if |
| 135 | * Relative) */ |
| 136 | for (i = 0; i < numAxes; i++) { |
| 137 | if (pDevice->valuator->axes[i].mode == Absolute) |
| 138 | dmxLocal->history[OFFSET(dmxLocal->tail, i + 1)] |
| 139 | = dmxLocal->valuators[i]; |
| 140 | else |
| 141 | dmxLocal->history[OFFSET(dmxLocal->tail, i + 1)] = 0; |
| 142 | } |
| 143 | |
| 144 | for (i = firstAxis; i < axesCount; i++) { |
| 145 | dmxLocal->history[OFFSET(dmxLocal->tail, i + i)] |
| 146 | = (unsigned long) v[i - firstAxis]; |
| 147 | dmxLocal->valuators[i] = v[i - firstAxis]; |
| 148 | } |
| 149 | } |