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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
#ifndef mozilla_layers_AnimationStorageData_h
#define mozilla_layers_AnimationStorageData_h
#include "mozilla/dom/Nullable.h"
#include "mozilla/ServoStyleConsts.h" // for ComputedTimingFunction
#include "mozilla/layers/LayersMessages.h" // for TransformData, etc
#include "mozilla/layers/LayersTypes.h" // for LayersId
#include "mozilla/TimeStamp.h" // for TimeStamp
#include "mozilla/TimingParams.h"
#include "X11UndefineNone.h"
namespace mozilla {
namespace dom {
enum class CompositeOperation : uint8_t;
enum class IterationCompositeOperation : uint8_t;
}; // namespace dom
namespace layers {
struct PropertyAnimation {
struct SegmentData {
RefPtr<StyleAnimationValue> mStartValue;
RefPtr<StyleAnimationValue> mEndValue;
Maybe<mozilla::StyleComputedTimingFunction> mFunction;
float mStartPortion;
float mEndPortion;
dom::CompositeOperation mStartComposite;
dom::CompositeOperation mEndComposite;
nsTArray<SegmentData> mSegments;
TimingParams mTiming;
// These two variables correspond to the variables of the same name in
// KeyframeEffectReadOnly and are used for the same purpose: to skip composing
// animations whose progress has not changed.
dom::Nullable<double> mProgressOnLastCompose;
uint64_t mCurrentIterationOnLastCompose = 0;
// These two variables are used for a similar optimization above but are
// applied to the timing function in each keyframe.
uint32_t mSegmentIndexOnLastCompose = 0;
dom::Nullable<double> mPortionInSegmentOnLastCompose;
TimeStamp mOriginTime;
Maybe<TimeDuration> mStartTime;
TimeDuration mHoldTime;
float mPlaybackRate;
dom::IterationCompositeOperation mIterationComposite;
bool mIsNotPlaying;
// The information for scroll-driven animations.
Maybe<ScrollTimelineOptions> mScrollTimelineOptions;
void ResetLastCompositionValues() {
mCurrentIterationOnLastCompose = 0;
mSegmentIndexOnLastCompose = 0;
struct PropertyAnimationGroup {
nsCSSPropertyID mProperty;
nsTArray<PropertyAnimation> mAnimations;
RefPtr<StyleAnimationValue> mBaseStyle;
bool IsEmpty() const { return mAnimations.IsEmpty(); }
void Clear() {
mBaseStyle = nullptr;
void ResetLastCompositionValues() {
for (PropertyAnimation& animation : mAnimations) {
struct AnimationStorageData {
// Each entry in the array represents an animation list for one property. For
// transform-like properties (e.g. transform, rotate etc.), there may be
// multiple entries depending on how many transform-like properties we have.
nsTArray<PropertyAnimationGroup> mAnimation;
Maybe<TransformData> mTransformData;
// For motion path. We cached the gfx path for optimization.
RefPtr<gfx::Path> mCachedMotionPath;
// This is used to communicate with the main-thread. E.g. to tell the fact
// that this animation needs to be pre-rendered again on the main-thread, etc.
LayersId mLayersId;
AnimationStorageData() = default;
AnimationStorageData(AnimationStorageData&& aOther) = default;
AnimationStorageData& operator=(AnimationStorageData&& aOther) = default;
// Avoid any copy because mAnimation could be a large array.
AnimationStorageData(const AnimationStorageData& aOther) = delete;
AnimationStorageData& operator=(const AnimationStorageData& aOther) = delete;
bool IsEmpty() const { return mAnimation.IsEmpty(); }
void Clear() {
mCachedMotionPath = nullptr;
} // namespace layers
} // namespace mozilla
#endif // mozilla_layers_AnimationStorageData_h