chromium/cc/animation/worklet_animation.h

// Copyright 2017 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_WORKLET_ANIMATION_H_
#define CC_ANIMATION_WORKLET_ANIMATION_H_

#include <memory>
#include <optional>
#include <string>

#include "base/gtest_prod_util.h"
#include "base/time/time.h"
#include "cc/animation/animation.h"
#include "cc/animation/animation_export.h"
#include "cc/animation/animation_host.h"
#include "cc/trees/property_tree.h"

namespace cc {

class AnimationOptions;
class AnimationEffectTimings;

// A WorkletAnimation is an animation that allows its animation
// timing to be controlled by an animator instance that is running in a
// AnimationWorkletGlobalScope.

// Two instances of this class are created for Blink WorkletAnimation:
// 1. UI thread instance that keeps all the meta data.
// 2. Impl thread instance that ticks the animations on the Impl thread.
// When Blink WorkletAnimation is updated, it calls the UI thread instance to
// modify its properties. The updated properties are pushed by the UI thread
// instance to the Impl thread instance during commit.
class CC_ANIMATION_EXPORT WorkletAnimation final : public Animation { … };

inline WorkletAnimation* ToWorkletAnimation(Animation* animation) { … }

}  // namespace cc

#endif  // CC_ANIMATION_WORKLET_ANIMATION_H_