| // 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_TIMING_FUNCTION_H_ |
| #define CC_ANIMATION_TIMING_FUNCTION_H_ |
| |
| #include "cc/base/cc_export.h" |
| #include "ui/gfx/geometry/cubic_bezier.h" |
| |
| namespace cc { |
| |
| // See http://www.w3.org/TR/css3-transitions/. |
| class CC_EXPORT TimingFunction { |
| public: |
| virtual ~TimingFunction(); |
| |
| virtual float GetValue(double t) const = 0; |
| virtual float Velocity(double time) const = 0; |
| // The smallest and largest values returned by GetValue for inputs in [0, 1]. |
| virtual void Range(float* min, float* max) const = 0; |
| virtual scoped_ptr<TimingFunction> Clone() const = 0; |
| |
| protected: |
| TimingFunction(); |
| |
| private: |
| DISALLOW_ASSIGN(TimingFunction); |
| }; |
| |
| class CC_EXPORT CubicBezierTimingFunction : public TimingFunction { |
| public: |
| static scoped_ptr<CubicBezierTimingFunction> Create(double x1, double y1, |
| double x2, double y2); |
| ~CubicBezierTimingFunction() override; |
| |
| // TimingFunction implementation. |
| float GetValue(double time) const override; |
| float Velocity(double time) const override; |
| void Range(float* min, float* max) const override; |
| scoped_ptr<TimingFunction> Clone() const override; |
| |
| protected: |
| CubicBezierTimingFunction(double x1, double y1, double x2, double y2); |
| |
| gfx::CubicBezier bezier_; |
| |
| private: |
| DISALLOW_ASSIGN(CubicBezierTimingFunction); |
| }; |
| |
| class CC_EXPORT EaseTimingFunction { |
| public: |
| static scoped_ptr<TimingFunction> Create(); |
| |
| private: |
| DISALLOW_IMPLICIT_CONSTRUCTORS(EaseTimingFunction); |
| }; |
| |
| class CC_EXPORT EaseInTimingFunction { |
| public: |
| static scoped_ptr<TimingFunction> Create(); |
| |
| private: |
| DISALLOW_IMPLICIT_CONSTRUCTORS(EaseInTimingFunction); |
| }; |
| |
| class CC_EXPORT EaseOutTimingFunction { |
| public: |
| static scoped_ptr<TimingFunction> Create(); |
| |
| private: |
| DISALLOW_IMPLICIT_CONSTRUCTORS(EaseOutTimingFunction); |
| }; |
| |
| class CC_EXPORT EaseInOutTimingFunction { |
| public: |
| static scoped_ptr<TimingFunction> Create(); |
| |
| private: |
| DISALLOW_IMPLICIT_CONSTRUCTORS(EaseInOutTimingFunction); |
| }; |
| |
| class CC_EXPORT StepsTimingFunction : public TimingFunction { |
| public: |
| static scoped_ptr<StepsTimingFunction> Create(int steps, |
| float steps_start_offset); |
| ~StepsTimingFunction() override; |
| |
| float GetValue(double t) const override; |
| scoped_ptr<TimingFunction> Clone() const override; |
| |
| void Range(float* min, float* max) const override; |
| float Velocity(double time) const override; |
| |
| protected: |
| StepsTimingFunction(int steps, float steps_start_offset); |
| |
| private: |
| int steps_; |
| float steps_start_offset_; |
| |
| DISALLOW_ASSIGN(StepsTimingFunction); |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_ANIMATION_TIMING_FUNCTION_H_ |