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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_TREES_LATENCY_INFO_SWAP_PROMISE_H_
#define CC_TREES_LATENCY_INFO_SWAP_PROMISE_H_
#include <stdint.h>
#include "base/compiler_specific.h"
#include "base/time/time.h"
#include "cc/trees/swap_promise.h"
#include "ui/latency/latency_info.h"
namespace cc {
// Associates a |LatencyInfo| with a compositor frame's metadata before that
// frame is sent to the downstream display compositor. The |LatencyInfo|
// instances used here track latencies of pieces of the input handling
// pipeline. Compositor frame consumers can combine their internal latency
// measurements with these measurements to generate end-to-end reports of input
// latency.
class CC_EXPORT LatencyInfoSwapPromise : public SwapPromise {
public:
explicit LatencyInfoSwapPromise(const ui::LatencyInfo& latency_info);
~LatencyInfoSwapPromise() override;
void DidActivate() override {}
void WillSwap(viz::CompositorFrameMetadata* metadata) override;
void DidSwap() override;
DidNotSwapAction DidNotSwap(DidNotSwapReason reason,
base::TimeTicks ts) override;
void OnCommit() override;
int64_t GetTraceId() const override;
private:
ui::LatencyInfo latency_;
};
} // namespace cc
#endif // CC_TREES_LATENCY_INFO_SWAP_PROMISE_H_
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