Home | History | Annotate | Download | only in animation 
      1 // Copyright 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CC_ANIMATION_TIMING_FUNCTION_H_
      6 #define CC_ANIMATION_TIMING_FUNCTION_H_
      7 
      8 #include "cc/animation/animation_curve.h"
      9 #include "cc/base/cc_export.h"
     10 #include "third_party/skia/include/core/SkScalar.h"
     11 
     12 namespace cc {
     13 
     14 // See http://www.w3.org/TR/css3-transitions/.
     15 class CC_EXPORT TimingFunction : public FloatAnimationCurve {
     16  public:
     17   virtual ~TimingFunction();
     18 
     19   // Partial implementation of FloatAnimationCurve.
     20   virtual double Duration() const OVERRIDE;
     21 
     22   // The smallest and largest values returned by GetValue for inputs in
     23   // [0, 1].
     24   virtual void Range(float* min, float* max) const = 0;
     25 
     26  protected:
     27   TimingFunction();
     28 
     29  private:
     30   DISALLOW_ASSIGN(TimingFunction);
     31 };
     32 
     33 class CC_EXPORT CubicBezierTimingFunction : public TimingFunction {
     34  public:
     35   static scoped_ptr<CubicBezierTimingFunction> Create(double x1, double y1,
     36                                                       double x2, double y2);
     37   virtual ~CubicBezierTimingFunction();
     38 
     39   // Partial implementation of FloatAnimationCurve.
     40   virtual float GetValue(double time) const OVERRIDE;
     41   virtual scoped_ptr<AnimationCurve> Clone() const OVERRIDE;
     42 
     43   virtual void Range(float* min, float* max) const OVERRIDE;
     44 
     45  protected:
     46   CubicBezierTimingFunction(double x1, double y1, double x2, double y2);
     47 
     48   double x1_;
     49   double y1_;
     50   double x2_;
     51   double y2_;
     52 
     53  private:
     54   DISALLOW_ASSIGN(CubicBezierTimingFunction);
     55 };
     56 
     57 class CC_EXPORT EaseTimingFunction {
     58  public:
     59   static scoped_ptr<TimingFunction> Create();
     60 
     61  private:
     62   DISALLOW_IMPLICIT_CONSTRUCTORS(EaseTimingFunction);
     63 };
     64 
     65 class CC_EXPORT EaseInTimingFunction {
     66  public:
     67   static scoped_ptr<TimingFunction> Create();
     68 
     69  private:
     70   DISALLOW_IMPLICIT_CONSTRUCTORS(EaseInTimingFunction);
     71 };
     72 
     73 class CC_EXPORT EaseOutTimingFunction {
     74  public:
     75   static scoped_ptr<TimingFunction> Create();
     76 
     77  private:
     78   DISALLOW_IMPLICIT_CONSTRUCTORS(EaseOutTimingFunction);
     79 };
     80 
     81 class CC_EXPORT EaseInOutTimingFunction {
     82  public:
     83   static scoped_ptr<TimingFunction> Create();
     84 
     85  private:
     86   DISALLOW_IMPLICIT_CONSTRUCTORS(EaseInOutTimingFunction);
     87 };
     88 
     89 }  // namespace cc
     90 
     91 #endif  // CC_ANIMATION_TIMING_FUNCTION_H_
     92