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ash / public / cpp / presentation_time_recorder.h [blame]
// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_PUBLIC_CPP_PRESENTATION_TIME_RECORDER_H_
#define ASH_PUBLIC_CPP_PRESENTATION_TIME_RECORDER_H_
#include <memory>
#include <optional>
#include "ash/public/cpp/ash_public_export.h"
namespace aura {
class Window;
}
namespace ash {
// A general interface for presentation time recording.
class ASH_PUBLIC_EXPORT PresentationTimeRecorder {
public:
// Creates a recorder tracking ui::Compositor.
static std::unique_ptr<PresentationTimeRecorder> CreateCompositorRecorder(
aura::Window* window,
const char* latency_histogram_name,
std::optional<const char*> max_latency_histogram_name = std::nullopt);
virtual ~PresentationTimeRecorder() = default;
// Prepare to record timin for UI changes. Invoked before making UI changes
// so that the recorder could start to watch for UI changes if needed.
virtual void PrepareToRecord() {}
// Request to record timing for the next frame. Returns true if the request
// is accepted. Otherwise, returns false.
virtual bool RequestNext() = 0;
};
} // namespace ash
#endif // ASH_PUBLIC_CPP_PRESENTATION_TIME_RECORDER_H_