Part 3 of cc/ directory shuffles: animation

cc/animation_curve.h

-// Copyright 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef CC_ANIMATION_CURVE_H_
-#define CC_ANIMATION_CURVE_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "cc/base/cc_export.h"
-#include "ui/gfx/transform.h"
-
-namespace cc {
-
-class FloatAnimationCurve;
-class TransformAnimationCurve;
-class TransformOperations;
-
-// An animation curve is a function that returns a value given a time.
-// There are currently only two types of curve, float and transform.
-class CC_EXPORT AnimationCurve {
- public:
-  enum CurveType { Float, Transform };
-
-  virtual ~AnimationCurve() {}
-
-  virtual double Duration() const = 0;
-  virtual CurveType Type() const = 0;
-  virtual scoped_ptr<AnimationCurve> Clone() const = 0;
-
-  const FloatAnimationCurve* ToFloatAnimationCurve() const;
-  const TransformAnimationCurve* ToTransformAnimationCurve() const;
-};
-
-class CC_EXPORT FloatAnimationCurve : public AnimationCurve {
- public:
-  virtual ~FloatAnimationCurve() {}
-
-  virtual float GetValue(double t) const = 0;
-
-  // Partial Animation implementation.
-  virtual CurveType Type() const OVERRIDE;
-};
-
-class CC_EXPORT TransformAnimationCurve : public AnimationCurve {
- public:
-  virtual ~TransformAnimationCurve() {}
-
-  virtual gfx::Transform GetValue(double t) const = 0;
-
-  // Partial Animation implementation.
-  virtual CurveType Type() const OVERRIDE;
-};
-
-}  // namespace cc
-
-#endif  // CC_ANIMATION_CURVE_H_