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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_LAYER_TREE_HOST_SINGLE_THREAD_CLIENT_H_
#define CC_TREES_LAYER_TREE_HOST_SINGLE_THREAD_CLIENT_H_
#include "base/containers/flat_set.h"
#include "base/time/time.h"
#include "components/viz/common/surfaces/frame_sink_id.h"
namespace cc {
class LayerTreeHostSingleThreadClient {
public:
// Tells single-threaded web tests that a new commit needs to be scheduled.
virtual void ScheduleAnimationForWebTests() {}
// Called whenever the begin frame interval changes. This interval can be used
// for animations.
virtual void FrameIntervalUpdated(base::TimeDelta interval) {}
// Called whenever the compositor submits a CompositorFrame. Afterward,
// LayerTreeHostClient::DidReceiveCompositorFrameAck() will be called once the
// display compositor/ finishes processing the frame. So these functions can
// be used to keep track of pending submitted CompositorFrames for rate
// limiting.
virtual void DidSubmitCompositorFrame() = 0;
// Called when the active LayerTreeFrameSink is lost and needs to be
// replaced. This allows the embedder to schedule a composite which will
// run the machinery to acquire a new LayerTreeFrameSink.
virtual void DidLoseLayerTreeFrameSink() = 0;
// When compositing-based throttling is enabled, this function is called every
// time when a frame composition change has updated the frame sinks to
// throttle.
virtual void FrameSinksToThrottleUpdated(
const base::flat_set<viz::FrameSinkId>& ids) {}
protected:
virtual ~LayerTreeHostSingleThreadClient() {}
};
} // namespace cc
#endif // CC_TREES_LAYER_TREE_HOST_SINGLE_THREAD_CLIENT_H_
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