| // Copyright 2020 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 "ash/hud_display/compositor_stats.h" |
| |
| #include "ui/compositor/compositor.h" |
| #include "ui/gfx/presentation_feedback.h" |
| |
| namespace ash { |
| namespace hud_display { |
| |
| CompositorStats::CompositorStats(Observer* observer, ui::Compositor* compositor) |
| : observer_(observer), compositor_(compositor) { |
| compositor_->AddObserver(this); |
| } |
| |
| CompositorStats::~CompositorStats() { |
| compositor_->RemoveObserver(this); |
| } |
| |
| void CompositorStats::OnDidPresentCompositorFrame( |
| uint32_t frame_token, |
| const gfx::PresentationFeedback& feedback) { |
| constexpr base::TimeDelta kOneSec = base::TimeDelta::FromSeconds(1); |
| constexpr base::TimeDelta k500ms = base::TimeDelta::FromMilliseconds(500); |
| if (!feedback.failed()) |
| presented_times_.push_back(feedback.timestamp); |
| |
| const base::TimeTicks deadline_1s = feedback.timestamp - kOneSec; |
| while (!presented_times_.empty() && presented_times_.front() <= deadline_1s) |
| presented_times_.pop_front(); |
| |
| const float frame_rate_1s = presented_times_.size(); |
| |
| const base::TimeTicks deadline_500ms = feedback.timestamp - k500ms; |
| float frame_rate_500ms = 0; |
| for (auto i = presented_times_.crbegin(); |
| (i != presented_times_.crend()) && (*i > deadline_500ms); ++i) { |
| ++frame_rate_500ms; |
| } |
| |
| frame_rate_500ms *= 2; // per second |
| observer_->OnFramePresented(frame_rate_1s, frame_rate_500ms, |
| compositor_->refresh_rate()); |
| } |
| |
| } // namespace hud_display |
| } // namespace ash |