third_party/WebKit/public/web/WebBeginFrameArgs.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef WebBeginFrameArgs_h
   6 #define WebBeginFrameArgs_h
   7
   8 namespace blink {
   9
  10 struct WebBeginFrameArgs {
  11     WebBeginFrameArgs(double lastFrameTimeMonotonic, double deadline, double interval)
  12         : lastFrameTimeMonotonic(lastFrameTimeMonotonic)
  13         , deadline(deadline)
  14         , interval(interval)
  15     { }
  16
  17     // FIXME: Upgrade the time in CLOCK_MONOTONIC values to use a TimeTick like
  18     // class rather than a bare double.
  19
  20     // FIXME: Extend this class to include the fields from Chrome
  21     // BeginFrameArgs structure.
  22
  23     // Time in CLOCK_MONOTONIC that is the most recent vsync time.
  24     double lastFrameTimeMonotonic;
  25
  26     // Time in CLOCK_MONOTONIC by which the renderer should finish producing the current frame. 0 means a deadline wasn't set.
  27     double deadline;
  28
  29     // Expected delta between two successive frame times. 0 if a regular interval isn't available.
  30     double interval;
  31 };
  32
  33 } // namespace blink
  34
  35 #endif