chromium/cc/animation/animation_host.h

// Copyright 2015 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_ANIMATION_ANIMATION_HOST_H_
#define CC_ANIMATION_ANIMATION_HOST_H_

#include <memory>
#include <unordered_map>
#include <vector>

#include "base/memory/raw_ptr.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "cc/animation/animation_export.h"
#include "cc/animation/keyframe_model.h"
#include "cc/base/protected_sequence_synchronizer.h"
#include "cc/trees/mutator_host.h"
#include "cc/trees/mutator_host_client.h"
#include "ui/gfx/geometry/box_f.h"
#include "ui/gfx/geometry/point_f.h"
#include "ui/gfx/geometry/vector2d_f.h"

namespace cc {

class Animation;
class AnimationTimeline;
class ElementAnimations;
class LayerTreeHost;
class ScrollOffsetAnimations;
class ScrollOffsetAnimationsImpl;
class WorkletAnimation;

enum class ThreadInstance { … };

// An AnimationHost contains all the state required to play animations.
// Specifically, it owns all the AnimationTimelines objects.
// There is just one AnimationHost for LayerTreeHost on main renderer thread
// and just one AnimationHost for LayerTreeHostImpl on impl thread.
// We synchronize them during the commit process in a one-way data flow process
// (PushPropertiesTo).
// An AnimationHost talks to its correspondent LayerTreeHost via
// MutatorHostClient interface.
class CC_ANIMATION_EXPORT AnimationHost : public MutatorHost,
                                          public LayerTreeMutatorClient,
                                          public ProtectedSequenceSynchronizer { … };

}  // namespace cc

#endif  // CC_ANIMATION_ANIMATION_HOST_H_