/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at
http://mozilla.org/MPL/2.0/. */
include protocol PBackground;
include protocol PBrowser;
include "mozilla/layers/LayersMessageUtils.h";
using class mozilla::TimeStamp from "mozilla/TimeStamp.h";
using mozilla::VsyncEvent from "mozilla/VsyncDispatcher.h";
namespace mozilla {
namespace dom {
/*
* The PVsync is a sub-protocol in PBackground or PBrowser and it is used to
* notify the vsync event from chrome to content process. It also provides the
* interfaces for content to observe/unobserve vsync event notifications.
*/
async protocol PVsync
{
manager PBackground or PBrowser;
child:
// Send vsync event and vsync rate from chrome to content process.
[Compress, Priority=vsync] async Notify(VsyncEvent aVsync, float aVsyncRate);
parent:
// Content process use these messages to acquire the vsync event.
async Observe();
async Unobserve();
// This message is never sent. Each PVsync actor will stay alive as long as
// its PBackground or PBrowser manager.
async __delete__();
};
} // namespace dom
} // namespace mozilla
