// Copyright 2013 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.

#include "cc/debug/rendering_stats_instrumentation.h"

namespace cc {

// static
scoped_ptr<RenderingStatsInstrumentation>
    RenderingStatsInstrumentation::Create() {
  return make_scoped_ptr(new RenderingStatsInstrumentation());
}

RenderingStatsInstrumentation::RenderingStatsInstrumentation()
    : record_rendering_stats_(false) {
}

RenderingStatsInstrumentation::~RenderingStatsInstrumentation() {}

RenderingStats RenderingStatsInstrumentation::impl_thread_rendering_stats() {
  base::AutoLock scoped_lock(lock_);
  return impl_thread_rendering_stats_;
}

RenderingStats RenderingStatsInstrumentation::GetRenderingStats() {
  base::AutoLock scoped_lock(lock_);
  RenderingStats rendering_stats;
  rendering_stats = impl_thread_rendering_stats_accu_;
  rendering_stats.Add(impl_thread_rendering_stats_);
  return rendering_stats;
}

void RenderingStatsInstrumentation::AccumulateAndClearImplThreadStats() {
  base::AutoLock scoped_lock(lock_);
  impl_thread_rendering_stats_accu_.Add(impl_thread_rendering_stats_);
  impl_thread_rendering_stats_ = RenderingStats();
}

base::TimeTicks RenderingStatsInstrumentation::StartRecording() const {
  if (record_rendering_stats_) {
    if (base::TimeTicks::IsThreadNowSupported())
      return base::TimeTicks::ThreadNow();
    return base::TimeTicks::HighResNow();
  }
  return base::TimeTicks();
}

base::TimeDelta RenderingStatsInstrumentation::EndRecording(
    base::TimeTicks start_time) const {
  if (!start_time.is_null()) {
    if (base::TimeTicks::IsThreadNowSupported())
      return base::TimeTicks::ThreadNow() - start_time;
    return base::TimeTicks::HighResNow() - start_time;
  }
  return base::TimeDelta();
}

void RenderingStatsInstrumentation::IncrementFrameCount(int64 count) {
  if (!record_rendering_stats_)
    return;

  base::AutoLock scoped_lock(lock_);
  impl_thread_rendering_stats_.frame_count += count;
}

void RenderingStatsInstrumentation::AddVisibleContentArea(int64 area) {
  if (!record_rendering_stats_)
    return;

  base::AutoLock scoped_lock(lock_);
  impl_thread_rendering_stats_.visible_content_area += area;
}

void RenderingStatsInstrumentation::AddApproximatedVisibleContentArea(
    int64 area) {
  if (!record_rendering_stats_)
    return;

  base::AutoLock scoped_lock(lock_);
  impl_thread_rendering_stats_.approximated_visible_content_area += area;
}

void RenderingStatsInstrumentation::AddDrawDuration(
    base::TimeDelta draw_duration,
    base::TimeDelta draw_duration_estimate) {
  if (!record_rendering_stats_)
    return;

  base::AutoLock scoped_lock(lock_);
  impl_thread_rendering_stats_.draw_duration.Append(draw_duration);
  impl_thread_rendering_stats_.draw_duration_estimate.Append(
      draw_duration_estimate);
}

void RenderingStatsInstrumentation::AddBeginMainFrameToCommitDuration(
    base::TimeDelta begin_main_frame_to_commit_duration,
    base::TimeDelta begin_main_frame_to_commit_duration_estimate) {
  if (!record_rendering_stats_)
    return;

  base::AutoLock scoped_lock(lock_);
  impl_thread_rendering_stats_.begin_main_frame_to_commit_duration.Append(
      begin_main_frame_to_commit_duration);
  impl_thread_rendering_stats_.begin_main_frame_to_commit_duration_estimate
      .Append(begin_main_frame_to_commit_duration_estimate);
}

void RenderingStatsInstrumentation::AddCommitToActivateDuration(
    base::TimeDelta commit_to_activate_duration,
    base::TimeDelta commit_to_activate_duration_estimate) {
  if (!record_rendering_stats_)
    return;

  base::AutoLock scoped_lock(lock_);
  impl_thread_rendering_stats_.commit_to_activate_duration.Append(
      commit_to_activate_duration);
  impl_thread_rendering_stats_.commit_to_activate_duration_estimate.Append(
      commit_to_activate_duration_estimate);
}

}  // namespace cc