chromium/third_party/blink/renderer/core/animation/primitive_interpolation.h

// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_PRIMITIVE_INTERPOLATION_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_PRIMITIVE_INTERPOLATION_H_

#include <cmath>
#include <limits>
#include <memory>
#include <utility>

#include "base/check_op.h"
#include "base/memory/ptr_util.h"
#include "third_party/blink/renderer/core/animation/typed_interpolation_value.h"
#include "third_party/blink/renderer/platform/geometry/blend.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"

namespace blink {

// Represents an animation's effect between an adjacent pair of
// PropertySpecificKeyframes after converting the keyframes to an internal
// format with respect to the animation environment and underlying values.
class PrimitiveInterpolation : public GarbageCollected<PrimitiveInterpolation> { … };

// Represents a pair of keyframes that are compatible for "smooth" interpolation
// eg. "0px" and "100px".
class PairwisePrimitiveInterpolation : public PrimitiveInterpolation { … };

// Represents a pair of incompatible keyframes that fall back to 50% flip
// behaviour eg. "auto" and "0px".
class FlipPrimitiveInterpolation : public PrimitiveInterpolation { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_PRIMITIVE_INTERPOLATION_H_