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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "device/vr/android/cardboard/cardboard_vr_device.h" |
| 6 |
| 7 #include <math.h> |
| 8 #include <algorithm> |
| 9 |
| 10 #include "base/android/context_utils.h" |
| 11 #include "base/android/jni_android.h" |
| 12 #include "base/android/jni_array.h" |
| 13 #include "base/android/jni_string.h" |
| 14 #include "base/strings/string_util.h" |
| 15 #include "base/strings/utf_string_conversions.h" |
| 16 #include "base/time/time.h" |
| 17 #include "base/trace_event/trace_event.h" |
| 18 #include "jni/CardboardVRDevice_jni.h" |
| 19 #include "ui/gfx/transform.h" |
| 20 #include "ui/gfx/transform_util.h" |
| 21 |
| 22 using base::android::AttachCurrentThread; |
| 23 using base::android::ScopedJavaLocalRef; |
| 24 |
| 25 namespace device { |
| 26 |
| 27 CardboardVRDevice::CardboardVRDevice(VRDeviceProvider* provider) |
| 28 : VRDevice(provider) { |
| 29 JNIEnv* env = AttachCurrentThread(); |
| 30 j_cardboard_device_.Reset(Java_CardboardVRDevice_create( |
| 31 env, base::android::GetApplicationContext())); |
| 32 j_head_matrix_.Reset(env, env->NewFloatArray(16)); |
| 33 } |
| 34 |
| 35 CardboardVRDevice::~CardboardVRDevice() { |
| 36 Java_CardboardVRDevice_stopTracking(AttachCurrentThread(), |
| 37 j_cardboard_device_.obj()); |
| 38 } |
| 39 |
| 40 VRDisplayPtr CardboardVRDevice::GetVRDevice() { |
| 41 TRACE_EVENT0("input", "CardboardVRDevice::GetVRDevice"); |
| 42 VRDisplayPtr device = VRDisplay::New(); |
| 43 |
| 44 JNIEnv* env = AttachCurrentThread(); |
| 45 |
| 46 ScopedJavaLocalRef<jstring> j_device_name = |
| 47 Java_CardboardVRDevice_getDeviceName(env, j_cardboard_device_.obj()); |
| 48 device->displayName = |
| 49 base::android::ConvertJavaStringToUTF8(env, j_device_name.obj()); |
| 50 |
| 51 ScopedJavaLocalRef<jfloatArray> j_fov(env, env->NewFloatArray(4)); |
| 52 Java_CardboardVRDevice_getFieldOfView(env, j_cardboard_device_.obj(), |
| 53 j_fov.obj()); |
| 54 |
| 55 std::vector<float> fov; |
| 56 base::android::JavaFloatArrayToFloatVector(env, j_fov.obj(), &fov); |
| 57 |
| 58 device->capabilities = VRDisplayCapabilities::New(); |
| 59 device->capabilities->hasOrientation = true; |
| 60 device->capabilities->hasPosition = false; |
| 61 device->capabilities->hasExternalDisplay = false; |
| 62 device->capabilities->canPresent = false; |
| 63 |
| 64 device->leftEye = VREyeParameters::New(); |
| 65 device->rightEye = VREyeParameters::New(); |
| 66 VREyeParametersPtr& left_eye = device->leftEye; |
| 67 VREyeParametersPtr& right_eye = device->rightEye; |
| 68 |
| 69 left_eye->fieldOfView = VRFieldOfView::New(); |
| 70 left_eye->fieldOfView->upDegrees = fov[0]; |
| 71 left_eye->fieldOfView->downDegrees = fov[1]; |
| 72 left_eye->fieldOfView->leftDegrees = fov[2]; |
| 73 left_eye->fieldOfView->rightDegrees = fov[3]; |
| 74 |
| 75 // Cardboard devices always assume a mirrored FOV, so this is just the left |
| 76 // eye FOV with the left and right degrees swapped. |
| 77 right_eye->fieldOfView = VRFieldOfView::New(); |
| 78 right_eye->fieldOfView->upDegrees = fov[0]; |
| 79 right_eye->fieldOfView->downDegrees = fov[1]; |
| 80 right_eye->fieldOfView->leftDegrees = fov[3]; |
| 81 right_eye->fieldOfView->rightDegrees = fov[2]; |
| 82 |
| 83 float ipd = Java_CardboardVRDevice_getIpd(env, j_cardboard_device_.obj()); |
| 84 |
| 85 left_eye->offset = mojo::Array<float>::New(3); |
| 86 left_eye->offset[0] = ipd * -0.5f; |
| 87 left_eye->offset[1] = 0.0f; |
| 88 left_eye->offset[2] = 0.0f; |
| 89 |
| 90 right_eye->offset = mojo::Array<float>::New(3); |
| 91 right_eye->offset[0] = ipd * 0.5f; |
| 92 right_eye->offset[1] = 0.0f; |
| 93 right_eye->offset[2] = 0.0f; |
| 94 |
| 95 ScopedJavaLocalRef<jintArray> j_screen_size(env, env->NewIntArray(2)); |
| 96 Java_CardboardVRDevice_getScreenSize(env, j_cardboard_device_.obj(), |
| 97 j_screen_size.obj()); |
| 98 |
| 99 std::vector<int> screen_size; |
| 100 base::android::JavaIntArrayToIntVector(env, j_screen_size.obj(), |
| 101 &screen_size); |
| 102 |
| 103 left_eye->renderWidth = screen_size[0] / 2.0; |
| 104 left_eye->renderHeight = screen_size[1]; |
| 105 |
| 106 right_eye->renderWidth = screen_size[0] / 2.0; |
| 107 right_eye->renderHeight = screen_size[1]; |
| 108 |
| 109 return device; |
| 110 } |
| 111 |
| 112 VRPosePtr CardboardVRDevice::GetPose() { |
| 113 TRACE_EVENT0("input", "CardboardVRDevice::GetSensorState"); |
| 114 VRPosePtr pose = VRPose::New(); |
| 115 |
| 116 pose->timestamp = base::Time::Now().ToJsTime(); |
| 117 |
| 118 JNIEnv* env = AttachCurrentThread(); |
| 119 Java_CardboardVRDevice_getSensorState(env, j_cardboard_device_.obj(), |
| 120 j_head_matrix_.obj()); |
| 121 |
| 122 std::vector<float> head_matrix; |
| 123 base::android::JavaFloatArrayToFloatVector(env, j_head_matrix_.obj(), |
| 124 &head_matrix); |
| 125 |
| 126 gfx::Transform transform( |
| 127 head_matrix[0], head_matrix[1], head_matrix[2], head_matrix[3], |
| 128 head_matrix[4], head_matrix[5], head_matrix[6], head_matrix[7], |
| 129 head_matrix[8], head_matrix[9], head_matrix[10], head_matrix[11], |
| 130 head_matrix[12], head_matrix[13], head_matrix[14], head_matrix[15]); |
| 131 |
| 132 gfx::DecomposedTransform decomposed_transform; |
| 133 gfx::DecomposeTransform(&decomposed_transform, transform); |
| 134 |
| 135 pose->orientation = mojo::Array<float>::New(4); |
| 136 pose->orientation[0] = decomposed_transform.quaternion[0]; |
| 137 pose->orientation[1] = decomposed_transform.quaternion[1]; |
| 138 pose->orientation[2] = decomposed_transform.quaternion[2]; |
| 139 pose->orientation[3] = decomposed_transform.quaternion[3]; |
| 140 |
| 141 pose->position = mojo::Array<float>::New(3); |
| 142 pose->position[0] = decomposed_transform.translate[0]; |
| 143 pose->position[1] = decomposed_transform.translate[1]; |
| 144 pose->position[2] = decomposed_transform.translate[2]; |
| 145 |
| 146 return pose; |
| 147 } |
| 148 |
| 149 void CardboardVRDevice::ResetPose() { |
| 150 Java_CardboardVRDevice_resetSensor(AttachCurrentThread(), |
| 151 j_cardboard_device_.obj()); |
| 152 } |
| 153 |
| 154 } // namespace device |
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