1 files changed, 27 insertions, 0 deletions
diff --git a/gfx/ipc/PVsyncBridge.ipdl b/gfx/ipc/PVsyncBridge.ipdl
new file mode 100644
index 0000000000..b498d8a0af
--- /dev/null
+++ b/gfx/ipc/PVsyncBridge.ipdl
@@ -0,0 +1,27 @@
+/* -*- Mode: C++; tab-width: 8; 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 "mozilla/layers/LayersMessageUtils.h";
+
+using class mozilla::TimeStamp from "mozilla/TimeStamp.h";
+using mozilla::layers::LayersId from "mozilla/layers/LayersTypes.h";
+using mozilla::VsyncEvent from "mozilla/VsyncDispatcher.h";
+
+namespace mozilla {
+namespace gfx {
+
+// This protocol only serves one purpose: deliver vsync notifications from a
+// dedicated thread in the UI process to the compositor thread in the
+// compositor process. The child side exists in the UI process, and the
+// parent side in the GPU process.
+[NeedsOtherPid]
+sync protocol PVsyncBridge
+{
+parent:
+  async NotifyVsync(VsyncEvent vsync, LayersId layersId);
+};
+
+} // namespace gfx
+} // namespace mozilla