cc/proto/compositor_message_to_main.proto

// Copyright 2016 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.

syntax = "proto2";

option optimize_for = LITE_RUNTIME;

import "begin_main_frame_and_commit_state.proto";

package cc.proto;

// Control messages sent to the main side of the compositor(server) from the
// impl side of the compositor(client).
// TODO(khushalsagar): Are any more messages required? (See crbug.com/584078)
message CompositorMessageToMain {
  enum Type {
    // The enum values which are unknown get mapped to the default value, which
    // is zero. This can happen with when the protocol version is different on
    // the client and server.
    // Ignore the messages with type UNKNOWN.
    UNKNOWN = 0;

    // Sent by the client to start the commit process. See
    // compositor_message_to_impl.proto for details.
    BEGIN_MAIN_FRAME = 1;
  }

  optional Type message_type = 1;

  // Only one of the following fields will be set per CompositorMessageToMain.

  // Set for message Type::BEGIN_MAIN_FRAME.
  optional BeginMainFrame begin_main_frame_message = 2;
}

message BeginMainFrame {
  optional BeginMainFrameAndCommitState begin_main_frame_state = 1;
}