gecko-dev/gfx/layers/AnimationHelper.h

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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 http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_layers_AnimationHelper_h
#define mozilla_layers_AnimationHelper_h
#include "mozilla/ComputedTimingFunction.h" // for ComputedTimingFunction
#include "mozilla/layers/LayersMessages.h" // for TransformData, etc
#include "mozilla/TimeStamp.h" // for TimeStamp
namespace mozilla {
class StyleAnimationValue;
namespace layers {
class Animation;
typedef InfallibleTArray<layers::Animation> AnimationArray;
struct AnimData {
InfallibleTArray<mozilla::StyleAnimationValue> mStartValues;
InfallibleTArray<mozilla::StyleAnimationValue> mEndValues;
InfallibleTArray<Maybe<mozilla::ComputedTimingFunction>> mFunctions;
};
struct AnimationTransform {
/*
* This transform is calculated from sampleanimation in device pixel
* and used by compositor.
*/
gfx::Matrix4x4 mTransformInDevSpace;
/*
* This transform is calculated from frame and used by getOMTAStyle()
* for OMTA testing.
*/
gfx::Matrix4x4 mFrameTransform;
TransformData mData;
};
struct AnimatedValue {
enum {
TRANSFORM,
OPACITY,
NONE
} mType {NONE};
union {
AnimationTransform mTransform;
float mOpacity;
};
AnimatedValue(gfx::Matrix4x4&& aTransformInDevSpace,
gfx::Matrix4x4&& aFrameTransform,
const TransformData& aData)
: mType(AnimatedValue::TRANSFORM)
{
mTransform.mTransformInDevSpace = Move(aTransformInDevSpace);
mTransform.mFrameTransform = Move(aFrameTransform);
mTransform.mData = aData;
}
explicit AnimatedValue(const float& aValue)
: mType(AnimatedValue::OPACITY)
, mOpacity(aValue)
{
}
~AnimatedValue() {}
private:
AnimatedValue() = delete;
};
// CompositorAnimationStorage stores the layer animations and animated value
// after sampling based on an unique id (CompositorAnimationsId)
class CompositorAnimationStorage final
{
typedef nsClassHashtable<nsUint64HashKey, AnimatedValue> AnimatedValueTable;
typedef nsClassHashtable<nsUint64HashKey, AnimationArray> AnimationsTable;
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CompositorAnimationStorage)
public:
/**
* Set the animation transform based on the unique id and also
* set up |aFrameTransform| and |aData| for OMTA testing
*/
void SetAnimatedValue(uint64_t aId,
gfx::Matrix4x4&& aTransformInDevSpace,
gfx::Matrix4x4&& aFrameTransform,
const TransformData& aData);
/**
* Set the animation transform in device pixel based on the unique id
*/
void SetAnimatedValue(uint64_t aId,
gfx::Matrix4x4&& aTransformInDevSpace);
/**
* Set the animation opacity based on the unique id
*/
void SetAnimatedValue(uint64_t aId, const float& aOpacity);
/**
* Return the animated value if a given id can map to its animated value
*/
AnimatedValue* GetAnimatedValue(const uint64_t& aId) const;
/**
* Like GetAnimatedValue(), but ensures the value is an opacity and returns
* the float value if possible, or Nothing() otherwise.
*/
Maybe<float> GetAnimationOpacity(const uint64_t& aId) const;
/**
* Like GetAnimatedValue(), but ensures the value is a transform and returns
* the transform matrix if possible, or Nothing() otherwise. It also does
* some post-processing on the transform matrix as well. See the comments
* inside the function for details.
*/
Maybe<gfx::Matrix4x4> GetAnimationTransform(const uint64_t& aId) const;
/**
* Return the iterator of animated value table
*/
AnimatedValueTable::Iterator ConstAnimatedValueTableIter() const
{
return mAnimatedValues.ConstIter();
}
uint32_t AnimatedValueCount() const
{
return mAnimatedValues.Count();
}
/**
* Set the animations based on the unique id
*/
void SetAnimations(uint64_t aId, const AnimationArray& aAnimations);
/**
* Return the animations if a given id can map to its animations
*/
AnimationArray* GetAnimations(const uint64_t& aId) const;
/**
* Return the iterator of animations table
*/
AnimationsTable::Iterator ConstAnimationsTableIter() const
{
return mAnimations.ConstIter();
}
uint32_t AnimationsCount() const
{
return mAnimations.Count();
}
/**
* Clear AnimatedValues and Animations data
*/
void Clear();
void ClearById(const uint64_t& aId);
private:
~CompositorAnimationStorage() { };
private:
AnimatedValueTable mAnimatedValues;
AnimationsTable mAnimations;
};
class AnimationHelper
{
public:
/*
* TODO Bug 1356509 Once we decouple the compositor animations and layers
* in parent side, the API will be called inside SampleAnimations.
* Before this, we expose this API for AsyncCompositionManager.
*
* Sample animations based on a given time stamp for a element(layer) with
* its animation data.
* Returns true if there exists compositor animation, and stores corresponding
* animated value in |aAnimationValue|.
*/
static bool
SampleAnimationForEachNode(TimeStamp aTime,
AnimationArray& aAnimations,
InfallibleTArray<AnimData>& aAnimationData,
StyleAnimationValue& aAnimationValue,
bool& aHasInEffectAnimations);
/*
* TODO Bug 1356509 Once we decouple the compositor animations and layers
* in parent side, the API will be called inside SampleAnimations.
* Before this, we expose this API for AsyncCompositionManager.
*
* Populates AnimData stuctures into |aAnimData| based on |aAnimations|
*/
static void
SetAnimations(AnimationArray& aAnimations,
InfallibleTArray<AnimData>& aAnimData,
StyleAnimationValue& aBaseAnimationStyle);
/*
* Get a unique id to represent the compositor animation between child
* and parent side. This id will be used as a key to store animation
* data in the CompositorAnimationStorage per compositor.
* Each layer on the content side calls this when it gets new animation
* data.
*/
static uint64_t GetNextCompositorAnimationsId();
/*
* Sample animation based a given time stamp |aTime| and the animation
* data inside CompositorAnimationStorage |aStorage|. The animated values
* after sampling will be stored in CompositorAnimationStorage as well.
*/
static void
SampleAnimations(CompositorAnimationStorage* aStorage,
TimeStamp aTime);
};
} // namespace layers
} // namespace mozilla
#endif // mozilla_layers_AnimationHelper_h