keyframe_effect.h | Explore in Territory

// 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_KEYFRAME_EFFECT_H_
#define CC_ANIMATION_KEYFRAME_EFFECT_H_

#include <limits>
#include <memory>
#include <string>
#include <vector>

#include "base/memory/raw_ptr.h"
#include "base/memory/ref_counted.h"
#include "base/time/time.h"
#include "cc/animation/animation_events.h"
#include "cc/animation/animation_export.h"
#include "cc/animation/element_animations.h"
#include "cc/animation/keyframe_model.h"
#include "cc/paint/element_id.h"
#include "cc/trees/mutator_host_client.h"
#include "cc/trees/target_property.h"
#include "ui/gfx/animation/keyframe/keyframe_effect.h"
#include "ui/gfx/geometry/box_f.h"
#include "ui/gfx/geometry/point_f.h"

namespace cc {

class Animation;
enum class PauseCondition { … };
struct PropertyAnimationState;

// Specially designed for a custom property animation on a paint worklet
// element. It doesn't require an element id to run on the compositor thread.
// However, our animation system requires the element to be on the property
// tree in order to keep ticking the animation. Therefore, we use a reserved
// element id for this animation so that the compositor animation system
// recognize it. We do not use ElementId because it's an invalid element id.
inline constexpr ElementId kReservedElementIdForPaintWorklet(
    std::numeric_limits<ElementId::InternalValue>::max() - 1);

// A KeyframeEffect owns a group of KeyframeModels for a single target
// (identified by an ElementId). It is responsible for managing the
// KeyframeModels' running states (starting, running, paused, etc), as well as
// ticking the KeyframeModels when it is requested to produce new outputs for a
// given time.
//
// Note that a single KeyframeEffect may not own all the KeyframeModels for a
// given target. KeyframeEffect is only a grouping mechanism for related
// KeyframeModels. The commonality between keyframe models on the same target
// is found via ElementAnimations - there is only one ElementAnimations for a
// given target.
class CC_ANIMATION_EXPORT KeyframeEffect : public gfx::KeyframeEffect { … };

}  // namespace cc

#endif  // CC_ANIMATION_KEYFRAME_EFFECT_H_
chromium/cc/animation/keyframe_effect.h
