third_party/WebKit/Source/modules/vr/HMDVRDevice.cpp

// Copyright 2015 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 "modules/vr/HMDVRDevice.h"

#include "modules/vr/VRController.h"
#include "modules/vr/VRFieldOfView.h"

namespace blink {

namespace {

VREye stringToVREye(const String& whichEye)
{
    if (whichEye == "left")
        return VREyeLeft;
    if (whichEye == "right")
        return VREyeRight;
    return VREyeNone;
}

} // namespace

HMDVRDevice::HMDVRDevice(VRHardwareUnit* hardwareUnit, unsigned deviceId)
    : VRDevice(hardwareUnit, deviceId)
{
    m_eyeParametersLeft = VREyeParameters::create();
    m_eyeParametersRight = VREyeParameters::create();
}

void HMDVRDevice::updateFromWebVRDevice(const WebVRDevice& device)
{
    VRDevice::updateFromWebVRDevice(device);
    const WebVRHMDInfo &hmdInfo = device.hmdInfo;

    m_eyeParametersLeft->setFromWebVREyeParameters(hmdInfo.leftEye);
    m_eyeParametersRight->setFromWebVREyeParameters(hmdInfo.rightEye);
}

VREyeParameters* HMDVRDevice::getEyeParameters(const String& whichEye)
{
    switch (stringToVREye(whichEye)) {
    case VREyeLeft:
        return m_eyeParametersLeft;
    case VREyeRight:
        return m_eyeParametersRight;
    default:
        return nullptr;
    }
}

void HMDVRDevice::setFieldOfView(VRFieldOfView* leftFov, VRFieldOfView* rightFov)
{
    // FIXME: Currently min == max == recommended FOV, but when that changes
    // this function will need to perform clamping and track the set value
}

DEFINE_TRACE(HMDVRDevice)
{
    visitor->trace(m_eyeParametersLeft);
    visitor->trace(m_eyeParametersRight);

    VRDevice::trace(visitor);
}

} // namespace blink