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 "ui/gfx/geometry/cubic_bezier.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   gfx::CubicBezier bezier_;
  49
  50  private:
  51   DISALLOW_ASSIGN(CubicBezierTimingFunction);
  52 };
  53
  54 class CC_EXPORT EaseTimingFunction {
  55  public:
  56   static scoped_ptr<TimingFunction> Create();
  57
  58  private:
  59   DISALLOW_IMPLICIT_CONSTRUCTORS(EaseTimingFunction);
  60 };
  61
  62 class CC_EXPORT EaseInTimingFunction {
  63  public:
  64   static scoped_ptr<TimingFunction> Create();
  65
  66  private:
  67   DISALLOW_IMPLICIT_CONSTRUCTORS(EaseInTimingFunction);
  68 };
  69
  70 class CC_EXPORT EaseOutTimingFunction {
  71  public:
  72   static scoped_ptr<TimingFunction> Create();
  73
  74  private:
  75   DISALLOW_IMPLICIT_CONSTRUCTORS(EaseOutTimingFunction);
  76 };
  77
  78 class CC_EXPORT EaseInOutTimingFunction {
  79  public:
  80   static scoped_ptr<TimingFunction> Create();
  81
  82  private:
  83   DISALLOW_IMPLICIT_CONSTRUCTORS(EaseInOutTimingFunction);
  84 };
  85
  86 }  // namespace cc
  87
  88 #endif  // CC_ANIMATION_TIMING_FUNCTION_H_