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/*
* Copyright (C) 2023 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "CompositeOperation.h"
#include "IterationCompositeOperation.h"
#include "TimingFunction.h"
#include "WebAnimationTypes.h"
#include <optional>
#include <wtf/Seconds.h>
namespace WebCore {
class KeyframeInterpolation {
public:
using Property = std::variant<AnimatableCSSProperty, AcceleratedEffectProperty>;
class Keyframe {
public:
virtual double offset() const = 0;
virtual std::optional<CompositeOperation> compositeOperation() const = 0;
virtual bool animatesProperty(Property) const = 0;
virtual bool isAcceleratedEffectKeyframe() const { return false; }
virtual bool isBlendingKeyframe() const { return false; }
virtual ~Keyframe() = default;
};
virtual CompositeOperation compositeOperation() const = 0;
virtual bool isPropertyAdditiveOrCumulative(Property) const = 0;
virtual IterationCompositeOperation iterationCompositeOperation() const { return IterationCompositeOperation::Replace; }
virtual const Keyframe& keyframeAtIndex(size_t) const = 0;
virtual size_t numberOfKeyframes() const = 0;
virtual const TimingFunction* timingFunctionForKeyframe(const Keyframe&) const = 0;
struct KeyframeInterval {
const Vector<const Keyframe*> endpoints;
bool hasImplicitZeroKeyframe { false };
bool hasImplicitOneKeyframe { false };
};
const KeyframeInterval interpolationKeyframes(Property, double iterationProgress, const Keyframe& defaultStartKeyframe, const Keyframe& defaultEndKeyframe) const;
using CompositionCallback = Function<void(const Keyframe&, CompositeOperation)>;
using AccumulationCallback = Function<void(const Keyframe&)>;
using InterpolationCallback = Function<void(double intervalProgress, double currentIteration, IterationCompositeOperation)>;
using RequiresBlendingForAccumulativeIterationCallback = Function<bool()>;
void interpolateKeyframes(Property, const KeyframeInterval&, double iterationProgress, double currentIteration, Seconds iterationDuration, const CompositionCallback&, const AccumulationCallback&, const InterpolationCallback&, const RequiresBlendingForAccumulativeIterationCallback&) const;
virtual ~KeyframeInterpolation() = default;
};
} // namespace WebCore
#define SPECIALIZE_TYPE_TRAITS_KEYFRAME_INTERPOLATION_KEYFRAME(ToValueTypeName, predicate) \
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::ToValueTypeName) \
static bool isType(const WebCore::KeyframeInterpolation::Keyframe& value) { return value.predicate; } \
SPECIALIZE_TYPE_TRAITS_END()
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