| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "device/vr/android/gvr/gvr_device.h" |
| |
| #include <math.h> |
| #include <algorithm> |
| |
| #include "base/time/time.h" |
| #include "base/trace_event/trace_event.h" |
| #include "third_party/gvr-android-sdk/src/ndk-beta/include/vr/gvr/capi/include/gvr.h" |
| #include "third_party/gvr-android-sdk/src/ndk-beta/include/vr/gvr/capi/include/gvr_types.h" |
| #include "ui/gfx/transform.h" |
| #include "ui/gfx/transform_util.h" |
| |
| namespace device { |
| |
| namespace { |
| |
| static const uint64_t kPredictionTimeWithoutVsyncNanos = 50000000; |
| |
| } // namespace |
| |
| GvrDevice::GvrDevice(VRDeviceProvider* provider, gvr::GvrApi* gvr_api) |
| : VRDevice(provider), gvr_api_(gvr_api) {} |
| |
| GvrDevice::~GvrDevice() {} |
| |
| VRDisplayPtr GvrDevice::GetVRDevice() { |
| TRACE_EVENT0("input", "GvrDevice::GetVRDevice"); |
| |
| VRDisplayPtr device = VRDisplay::New(); |
| |
| device->capabilities = VRDisplayCapabilities::New(); |
| device->capabilities->hasOrientation = true; |
| device->capabilities->hasPosition = false; |
| device->capabilities->hasExternalDisplay = false; |
| device->capabilities->canPresent = true; |
| |
| device->leftEye = VREyeParameters::New(); |
| device->rightEye = VREyeParameters::New(); |
| VREyeParametersPtr& left_eye = device->leftEye; |
| VREyeParametersPtr& right_eye = device->rightEye; |
| |
| device->displayName = gvr_api_->GetViewerModel(); |
| |
| gvr::BufferViewportList gvr_buffer_viewports = |
| gvr_api_->CreateEmptyBufferViewportList(); |
| gvr_buffer_viewports.SetToRecommendedBufferViewports(); |
| |
| gvr::BufferViewport eye_viewport = gvr_api_->CreateBufferViewport(); |
| gvr_buffer_viewports.GetBufferViewport(GVR_LEFT_EYE, &eye_viewport); |
| gvr::Rectf eye_fov = eye_viewport.GetSourceFov(); |
| left_eye->fieldOfView = VRFieldOfView::New(); |
| left_eye->fieldOfView->upDegrees = eye_fov.top; |
| left_eye->fieldOfView->downDegrees = eye_fov.bottom; |
| left_eye->fieldOfView->leftDegrees = eye_fov.left; |
| left_eye->fieldOfView->rightDegrees = eye_fov.right; |
| |
| eye_viewport = gvr_api_->CreateBufferViewport(); |
| gvr_buffer_viewports.GetBufferViewport(GVR_RIGHT_EYE, &eye_viewport); |
| eye_fov = eye_viewport.GetSourceFov(); |
| right_eye->fieldOfView = VRFieldOfView::New(); |
| right_eye->fieldOfView->upDegrees = eye_fov.top; |
| right_eye->fieldOfView->downDegrees = eye_fov.bottom; |
| right_eye->fieldOfView->leftDegrees = eye_fov.left; |
| right_eye->fieldOfView->rightDegrees = eye_fov.right; |
| |
| gvr::Mat4f left_eye_mat = gvr_api_->GetEyeFromHeadMatrix(GVR_LEFT_EYE); |
| gvr::Mat4f right_eye_mat = gvr_api_->GetEyeFromHeadMatrix(GVR_RIGHT_EYE); |
| |
| left_eye->offset = mojo::Array<float>::New(3); |
| left_eye->offset[0] = -left_eye_mat.m[0][3]; |
| left_eye->offset[1] = -left_eye_mat.m[1][3]; |
| left_eye->offset[2] = -left_eye_mat.m[2][3]; |
| |
| right_eye->offset = mojo::Array<float>::New(3); |
| right_eye->offset[0] = -right_eye_mat.m[0][3]; |
| right_eye->offset[1] = -right_eye_mat.m[1][3]; |
| right_eye->offset[2] = -right_eye_mat.m[2][3]; |
| |
| gvr::Sizei render_target_size = gvr_api_->GetRecommendedRenderTargetSize(); |
| |
| left_eye->renderWidth = render_target_size.width / 2; |
| left_eye->renderHeight = render_target_size.height; |
| |
| right_eye->renderWidth = render_target_size.width / 2; |
| right_eye->renderHeight = render_target_size.height; |
| |
| return device; |
| } |
| |
| VRPosePtr GvrDevice::GetPose() { |
| TRACE_EVENT0("input", "GvrDevice::GetSensorState"); |
| |
| VRPosePtr pose = VRPose::New(); |
| |
| pose->timestamp = base::Time::Now().ToJsTime(); |
| |
| gvr::ClockTimePoint target_time = gvr::GvrApi::GetTimePointNow(); |
| target_time.monotonic_system_time_nanos += kPredictionTimeWithoutVsyncNanos; |
| |
| gvr::Mat4f head_mat = gvr_api_->GetHeadPoseInStartSpace(target_time); |
| |
| gfx::Transform inv_transform( |
| head_mat.m[0][0], head_mat.m[0][1], head_mat.m[0][2], head_mat.m[0][3], |
| head_mat.m[1][0], head_mat.m[1][1], head_mat.m[1][2], head_mat.m[1][3], |
| head_mat.m[2][0], head_mat.m[2][1], head_mat.m[2][2], head_mat.m[2][3], |
| head_mat.m[3][0], head_mat.m[3][1], head_mat.m[3][2], head_mat.m[3][3]); |
| |
| gfx::Transform transform; |
| if (inv_transform.GetInverse(&transform)) { |
| gfx::DecomposedTransform decomposed_transform; |
| gfx::DecomposeTransform(&decomposed_transform, transform); |
| |
| pose->orientation = mojo::Array<float>::New(4); |
| pose->orientation[0] = decomposed_transform.quaternion[0]; |
| pose->orientation[1] = decomposed_transform.quaternion[1]; |
| pose->orientation[2] = decomposed_transform.quaternion[2]; |
| pose->orientation[3] = decomposed_transform.quaternion[3]; |
| |
| pose->position = mojo::Array<float>::New(3); |
| pose->position[0] = decomposed_transform.translate[0]; |
| pose->position[1] = decomposed_transform.translate[1]; |
| pose->position[2] = decomposed_transform.translate[2]; |
| } |
| |
| return pose; |
| } |
| |
| void GvrDevice::ResetPose() { |
| gvr_api_->ResetTracking(); |
| } |
| |
| } // namespace device |