PVsync.ipdl (1307B)
1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* This Source Code Form is subject to the terms of the Mozilla Public 3 * License, v. 2.0. If a copy of the MPL was not distributed with this 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 5 6 include protocol PBackground; 7 include protocol PBrowser; 8 include "mozilla/layers/LayersMessageUtils.h"; 9 10 using class mozilla::TimeStamp from "mozilla/TimeStamp.h"; 11 using mozilla::VsyncEvent from "mozilla/VsyncDispatcher.h"; 12 13 namespace mozilla { 14 namespace dom { 15 16 /* 17 * The PVsync is a sub-protocol in PBackground or PBrowser and it is used to 18 * notify the vsync event from chrome to content process. It also provides the 19 * interfaces for content to observe/unobserve vsync event notifications. 20 */ 21 async protocol PVsync 22 { 23 manager PBackground or PBrowser; 24 25 child: 26 // Send vsync event and vsync rate from chrome to content process. 27 [Compress, Priority=vsync] async Notify(VsyncEvent aVsync, float aVsyncRate); 28 29 parent: 30 // Content process use these messages to acquire the vsync event. 31 async Observe(); 32 async Unobserve(); 33 34 // This message is never sent. Each PVsync actor will stay alive as long as 35 // its PBackground or PBrowser manager. 36 async __delete__(); 37 }; 38 39 } // namespace dom 40 } // namespace mozilla