cc/animation/timing_function.h

   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_