chromium/device/vr/orientation/orientation_device.h

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef DEVICE_VR_ORIENTATION_ORIENTATION_DEVICE_H_
#define DEVICE_VR_ORIENTATION_ORIENTATION_DEVICE_H_

#include <memory>

#include "base/component_export.h"
#include "base/functional/callback_forward.h"
#include "base/threading/simple_thread.h"
#include "build/build_config.h"
#include "device/vr/public/mojom/vr_service.mojom.h"
#include "device/vr/vr_device_base.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "services/device/public/mojom/sensor_provider.mojom.h"
#include "ui/gfx/geometry/quaternion.h"

namespace device {

class SensorReadingSharedBufferReader;
class VROrientationSession;

// Use RELATIVE_ORIENTATION_QUATERNION rather than
// ABSOLUTE_ORIENTATION_QUATERNION because compass readings can be inacurate
// when used indoors, unless we're on Windows which doesn't support
// RELATIVE_ORIENTATION_QUATERNION.
// TODO(crbug.com/41323676) If RELATIVE_ORIENTATION_QUATERNION is ever
// implemented on Windows, use that instead.
static constexpr mojom::SensorType kOrientationSensorType = …mojom::SensorType::ABSOLUTE_ORIENTATION_QUATERNION;
#else
    mojom::SensorType::RELATIVE_ORIENTATION_QUATERNION;
#endif

// This class connects the orientation sensor events to the Web VR apis.
class COMPONENT_EXPORT(VR_ORIENTATION) VROrientationDevice
    : public VRDeviceBase,
      public mojom::SensorClient { … };

}  // namespace device

#endif  // DEVICE_VR_ORIENTATION_ORIENTATION_DEVICE_H_