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annotate Orchestland/Assets/OVR/Scripts/OVRPluginEvent.cs @ 1:f7675884f2a1

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Add Orchestland project
author Daiki OYAKAWA <e135764@ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2015 23:09:20 +0900
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1 /************************************************************************************
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2
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3 Copyright : Copyright 2014 Oculus VR, LLC. All Rights reserved.
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4
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5 Licensed under the Oculus VR Rift SDK License Version 3.2 (the "License");
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6 you may not use the Oculus VR Rift SDK except in compliance with the License,
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7 which is provided at the time of installation or download, or which
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8 otherwise accompanies this software in either electronic or hard copy form.
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9
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10 You may obtain a copy of the License at
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11
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12 http://www.oculusvr.com/licenses/LICENSE-3.2
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13
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14 Unless required by applicable law or agreed to in writing, the Oculus VR SDK
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15 distributed under the License is distributed on an "AS IS" BASIS,
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16 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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17 See the License for the specific language governing permissions and
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18 limitations under the License.
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19
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20 ************************************************************************************/
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21
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22 using UnityEngine;
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23 using System;
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24
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25 /// <summary>
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26 /// Matches the events in the native plugin.
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27 /// </summary>
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28 public enum RenderEventType
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29 {
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30 // PC
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31 BeginFrame = 0,
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32 EndFrame = 1,
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33 Initialize = 2,
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34 Destroy = 3,
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35
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36 // Android
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37 InitRenderThread = 0,
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38 Pause = 1,
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39 Resume = 2,
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40 LeftEyeEndFrame = 3,
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41 RightEyeEndFrame = 4,
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42 TimeWarp = 5,
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43 PlatformUI = 6,
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44 PlatformUIConfirmQuit = 7,
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45 }
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46
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47 /// <summary>
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48 /// Communicates with native plugin functions that run on the rendering thread.
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49 /// </summary>
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50 public static class OVRPluginEvent
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51 {
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52 /// <summary>
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53 /// Immediately issues the given event.
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54 /// </summary>
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55 public static void Issue(RenderEventType eventType)
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56 {
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57 GL.IssuePluginEvent(EncodeType((int)eventType));
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58 }
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59
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60 /// <summary>
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61 /// Create a data channel through the single 32-bit integer we are given to
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62 /// communicate with the plugin.
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63 /// Split the 32-bit integer event data into two separate "send-two-bytes"
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64 /// plugin events. Then issue the explicit event that makes use of the data.
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65 /// </summary>
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66 public static void IssueWithData(RenderEventType eventType, int eventData)
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67 {
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68 // Encode and send-two-bytes of data
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69 GL.IssuePluginEvent(EncodeData((int)eventType, eventData, 0));
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70
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71 // Encode and send remaining two-bytes of data
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72 GL.IssuePluginEvent(EncodeData((int)eventType, eventData, 1));
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73
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74 // Explicit event that uses the data
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75 GL.IssuePluginEvent(EncodeType((int)eventType));
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76 }
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77
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78 // PRIVATE MEMBERS
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79 //------------------------------
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80 // Pack event data into a Uint32:
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81 // - isDataFlag
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82 // - bytePos
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83 // - eventId data is associated with
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84 // - 2-bytes of event data
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85 //
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86 // 31 30 29...25 24...16 15...0
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87 // [data][pos][eventid][unused][payload]
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88 //------------------------------
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89 private const UInt32 IS_DATA_FLAG = 0x80000000;
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90 private const UInt32 DATA_POS_MASK = 0x40000000;
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91 private const int DATA_POS_SHIFT = 30;
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92 private const UInt32 EVENT_TYPE_MASK = 0x3E000000;
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93 private const int EVENT_TYPE_SHIFT = 25;
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94 private const UInt32 PAYLOAD_MASK = 0x0000FFFF;
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95 private const int PAYLOAD_SHIFT = 16;
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96
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97 private static int EncodeType(int eventType)
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98 {
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99 return (int)((UInt32)eventType & ~IS_DATA_FLAG); // make sure upper bit is not set
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100 }
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101
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102 private static int EncodeData(int eventId, int eventData, int pos)
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103 {
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104 UInt32 data = 0;
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105 data |= IS_DATA_FLAG;
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106 data |= (((UInt32)pos << DATA_POS_SHIFT) & DATA_POS_MASK);
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107 data |= (((UInt32)eventId << EVENT_TYPE_SHIFT) & EVENT_TYPE_MASK);
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108 data |= (((UInt32)eventData >> (pos * PAYLOAD_SHIFT)) & PAYLOAD_MASK);
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109
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110 return (int)data;
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111 }
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112
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113 private static int DecodeData(int eventData)
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114 {
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115 // bool hasData = (((UInt32)eventData & IS_DATA_FLAG) != 0);
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116 UInt32 pos = (((UInt32)eventData & DATA_POS_MASK) >> DATA_POS_SHIFT);
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117 // UInt32 eventId = (((UInt32)eventData & EVENT_TYPE_MASK) >> EVENT_TYPE_SHIFT);
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118 UInt32 payload = (((UInt32)eventData & PAYLOAD_MASK) << (PAYLOAD_SHIFT * (int)pos));
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119
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120 return (int)payload;
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121 }
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122 }