| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // 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 "base/optional.h" |
| #include "base/time/time.h" |
| #include "cc/animation/animation_export.h" |
| #include "cc/animation/keyframe_effect.h" |
| #include "cc/animation/single_keyframe_effect_animation.h" |
| |
| namespace cc { |
| |
| class ScrollTimeline; |
| |
| // A WorkletAnimation is an animation that allows its animation |
| // timing to be controlled by an animator instance that is running in a |
| // AnimationWorkletGlobalScope. |
| class CC_ANIMATION_EXPORT WorkletAnimation final |
| : public SingleKeyframeEffectAnimation { |
| public: |
| WorkletAnimation(int id, |
| const std::string& name, |
| std::unique_ptr<ScrollTimeline> scroll_timeline, |
| bool is_controlling_instance); |
| static scoped_refptr<WorkletAnimation> Create( |
| int id, |
| const std::string& name, |
| std::unique_ptr<ScrollTimeline> scroll_timeline); |
| scoped_refptr<Animation> CreateImplInstance() const override; |
| |
| const std::string& name() const { return name_; } |
| const ScrollTimeline* scroll_timeline() const { |
| return scroll_timeline_.get(); |
| } |
| |
| void SetLocalTime(base::TimeDelta local_time); |
| bool IsWorkletAnimation() const override; |
| |
| void Tick(base::TimeTicks monotonic_time) override; |
| |
| // Returns the current time to be passed into the underlying AnimationWorklet. |
| // The current time is based on the timeline associated with the animation. |
| double CurrentTime(base::TimeTicks monotonic_time, |
| const ScrollTree& scroll_tree); |
| |
| // Returns true if the worklet animation needs to be updated which happens iff |
| // its current time is going to be different from last time given these input. |
| bool NeedsUpdate(base::TimeTicks monotonic_time, |
| const ScrollTree& scroll_tree); |
| |
| private: |
| ~WorkletAnimation() override; |
| |
| std::string name_; |
| |
| // The ScrollTimeline associated with the underlying animation. If null, the |
| // animation is based on a DocumentTimeline. |
| // |
| // TODO(crbug.com/780148): A WorkletAnimation should own an AnimationTimeline |
| // which must exist but can either be a DocumentTimeline, ScrollTimeline, or |
| // some other future implementation. |
| std::unique_ptr<ScrollTimeline> scroll_timeline_; |
| |
| base::TimeDelta local_time_; |
| |
| base::Optional<double> last_current_time_; |
| |
| bool is_impl_instance_; |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_ANIMATION_WORKLET_ANIMATION_H_ |