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94 lines
3.3 KiB
C++
94 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GFX_VR_SERVICE_HOST_H
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#define GFX_VR_SERVICE_HOST_H
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#include "mozilla/RefPtr.h"
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#include "nsISupportsImpl.h"
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#include "nsTArray.h"
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#include <cstdint>
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namespace mozilla {
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namespace gfx {
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struct VRExternalShmem;
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class VRService;
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/**
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* VRServiceHost is allocated as a singleton in the GPU process.
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* It is responsible for allocating VRService either within the GPU process
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* or in the VR process.
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* When the VR process is enabled, it maintains the state of the VR process,
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* starting and stopping it as needed.
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* VRServiceHost provides an interface that enables communication of the
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* VRService in the same way regardless of it running within the GPU process
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* or the VR process.
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*/
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class VRServiceHost {
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(mozilla::gfx::VRServiceHost)
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public:
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static void Init(bool aEnableVRProcess);
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static VRServiceHost* Get();
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void Refresh();
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void StartService();
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void StopService();
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void Shutdown();
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void CreateService(volatile VRExternalShmem* aShmem);
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void NotifyVRProcessStarted();
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void CheckForPuppetCompletion();
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void PuppetSubmit(const nsTArray<uint64_t>& aBuffer);
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void PuppetReset();
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protected:
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private:
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explicit VRServiceHost(bool aEnableVRProcess);
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~VRServiceHost();
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void RefreshVRProcess();
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bool NeedVRProcess();
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void CreateVRProcess();
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void ShutdownVRProcess();
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void SendPuppetResetToVRProcess();
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void SendPuppetCheckForCompletionToVRProcess();
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void SendPuppetSubmitToVRProcess(const nsTArray<uint64_t>& aBuffer);
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// Commands pending to be sent to the puppet device
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// once the VR service is started.
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nsTArray<uint64_t> mPuppetPendingCommands;
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RefPtr<VRService> mVRService;
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// mVRProcessEnabled indicates that a separate, VR Process, should be used.
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// This may be false if the VR process is disabled with the
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// dom.vr.process.enabled preference or when the GPU process is disabled.
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// mVRProcessEnabled will not change once the browser is started and does not
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// reflect the started / stopped state of the VR Process.
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bool mVRProcessEnabled;
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// mVRProcessStarted is true when the VR Process is running.
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bool mVRProcessStarted;
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// mVRServiceReadyInVRProcess is true when the VR Process is running and the
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// VRService in the VR Process is ready to accept commands.
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bool mVRServiceReadyInVRProcess;
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// mVRServiceRequested is true when the VRService is needed. This can be due
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// to Web API activity (WebXR, WebVR), browser activity (eg, VR Video
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// Playback), or a request to simulate a VR device with the VRServiceTest /
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// puppet API. mVRServiceRequested indicates the intended state of the VR
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// Service and is not an indication that the VR Service is ready to accept
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// requests or that the VR Process is enabled or running. Toggling the
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// mVRServiceRequested flag will result in the VR Service and/or the VR
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// Process either starting or stopping as needed.
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bool mVRServiceRequested;
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};
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} // namespace gfx
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} // namespace mozilla
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#endif // GFX_VR_SERVICE_HOST_H
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