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_ 89