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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_CompositorAnimationStorage_h
#define mozilla_layers_CompositorAnimationStorage_h
#include "mozilla/layers/AnimationStorageData.h"
#include "mozilla/layers/LayersMessages.h" // for TransformData, etc
#include "mozilla/webrender/webrender_ffi.h"
#include "mozilla/Variant.h"
#include "nsClassHashtable.h"
#include "X11UndefineNone.h"
#include <memory>
#include <unordered_map>
#include <unordered_set>
namespace mozilla {
namespace layers {
class Animation;
class CompositorBridgeParent;
class OMTAController;
typedef nsTArray<layers::Animation> AnimationArray;
struct AnimationTransform {
* This transform is calculated from sampleanimation in device pixel
* and used for layers (i.e. non WebRender)
gfx::Matrix4x4 mTransformInDevSpace;
* This transform is calculated from frame used for WebRender and used by
* getOMTAStyle() for OMTA testing.
gfx::Matrix4x4 mFrameTransform;
TransformData mData;
struct AnimatedValue final {
typedef Variant<AnimationTransform, float, nscolor> AnimatedValueType;
const AnimatedValueType& Value() const { return mValue; }
const AnimationTransform& Transform() const {
const float& Opacity() const { return<float>(); }
const nscolor& Color() const { return<nscolor>(); }
template <typename T>
bool Is() const {
AnimatedValue(const gfx::Matrix4x4& aTransformInDevSpace,
const gfx::Matrix4x4& aFrameTransform,
const TransformData& aData)
: mValue(AsVariant(AnimationTransform{aTransformInDevSpace,
aFrameTransform, aData})) {}
explicit AnimatedValue(const float& aValue) : mValue(AsVariant(aValue)) {}
explicit AnimatedValue(nscolor aValue) : mValue(AsVariant(aValue)) {}
void SetTransform(const gfx::Matrix4x4& aFrameTransform,
const TransformData& aData) {
AnimationTransform& previous =<AnimationTransform>();
previous.mFrameTransform = aFrameTransform;
if (previous.mData != aData) {
previous.mData = aData;
void SetOpacity(float aOpacity) {
MOZ_ASSERT(<float>());<float>() = aOpacity;
void SetColor(nscolor aColor) {
MOZ_ASSERT(<nscolor>());<nscolor>() = aColor;
AnimatedValueType mValue;
struct WrAnimations {
nsTArray<wr::WrOpacityProperty> mOpacityArrays;
nsTArray<wr::WrTransformProperty> mTransformArrays;
nsTArray<wr::WrColorProperty> mColorArrays;
// CompositorAnimationStorage stores the animations and animated values
// keyed by a CompositorAnimationsId. The "animations" are a representation of
// an entire animation over time, while the "animated values" are values sampled
// from the animations at a particular point in time.
// There is one CompositorAnimationStorage per CompositorBridgeParent (i.e.
// one per browser window), and the CompositorAnimationsId key is unique within
// a particular CompositorAnimationStorage instance.
// Each layer which has animations gets a CompositorAnimationsId key, and reuses
// that key during its lifetime. Likewise, in layers-free webrender, a display
// item that is animated (e.g. nsDisplayTransform) gets a CompositorAnimationsId
// key and reuses that key (it persists the key via the frame user-data
// mechanism).
class CompositorAnimationStorage final {
typedef nsClassHashtable<nsUint64HashKey, AnimatedValue> AnimatedValueTable;
typedef std::unordered_map<uint64_t, std::unique_ptr<AnimationStorageData>>
explicit CompositorAnimationStorage(CompositorBridgeParent* aCompositorBridge)
: mLock("CompositorAnimationStorage::mLock"),
mCompositorBridge(aCompositorBridge) {}
OMTAValue GetOMTAValue(const uint64_t& aId) const;
* Collect all animations in this class as WebRender type properties.
WrAnimations CollectWebRenderAnimations() const;
* Set the animations based on the unique id
void SetAnimations(uint64_t aId, const LayersId& aLayersId,
const AnimationArray& aAnimations);
* Sample animation based the given timestamps and store them in this
* CompositorAnimationStorage. The animated values after sampling will be
* stored in CompositorAnimationStorage as well.
* Returns true if there is any animation.
* Note that even if there are only in-delay phase animations (i.e. not
* visually effective), this function returns true to ensure we composite
* again on the next tick.
* Note: This is called only by WebRender.
bool SampleAnimations(const OMTAController* aOMTAController,
TimeStamp aPreviousFrameTime,
TimeStamp aCurrentFrameTime);
bool HasAnimations() const;
* Clear AnimatedValues and Animations data
void ClearById(const uint64_t& aId);
~CompositorAnimationStorage() = default;
* Return the animated value if a given id can map to its animated value
AnimatedValue* GetAnimatedValue(const uint64_t& aId) const;
* Set the animation transform based on the unique id and also
* set up |aFrameTransform| and |aData| for OMTA testing.
* If |aPreviousValue| is not null, the animation transform replaces the value
* in the |aPreviousValue|.
* NOTE: |aPreviousValue| should be the value for the |aId|.
void SetAnimatedValue(uint64_t aId, AnimatedValue* aPreviousValue,
const gfx::Matrix4x4& aFrameTransform,
const TransformData& aData);
* Similar to above but for opacity.
void SetAnimatedValue(uint64_t aId, AnimatedValue* aPreviousValue,
float aOpacity);
* Similar to above but for color.
void SetAnimatedValue(uint64_t aId, AnimatedValue* aPreviousValue,
nscolor aColor);
AnimatedValueTable mAnimatedValues;
AnimationsTable mAnimations;
std::unordered_set<uint64_t> mNewAnimations;
mutable Mutex mLock MOZ_UNANNOTATED;
// CompositorBridgeParent owns this CompositorAnimationStorage instance.
CompositorBridgeParent* MOZ_NON_OWNING_REF mCompositorBridge;
} // namespace layers
} // namespace mozilla
#endif // mozilla_layers_CompositorAnimationStorage_h