| /* |
| * Copyright (C) 2000 Lars Knoll (knoll@kde.org) |
| * (C) 2000 Antti Koivisto (koivisto@kde.org) |
| * (C) 2000 Dirk Mueller (mueller@kde.org) |
| * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. |
| * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com) |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #ifndef SKY_ENGINE_PLATFORM_ANIMATION_TIMINGFUNCTION_H_ |
| #define SKY_ENGINE_PLATFORM_ANIMATION_TIMINGFUNCTION_H_ |
| |
| #include <algorithm> |
| #include "sky/engine/platform/animation/AnimationUtilities.h" |
| #include "sky/engine/platform/animation/UnitBezier.h" |
| #include "sky/engine/wtf/OwnPtr.h" |
| #include "sky/engine/wtf/PassOwnPtr.h" |
| #include "sky/engine/wtf/PassRefPtr.h" |
| #include "sky/engine/wtf/RefCounted.h" |
| #include "sky/engine/wtf/StdLibExtras.h" |
| #include "sky/engine/wtf/text/StringBuilder.h" |
| #include "sky/engine/wtf/text/WTFString.h" |
| |
| namespace blink { |
| |
| class PLATFORM_EXPORT TimingFunction : public RefCounted<TimingFunction> { |
| public: |
| |
| enum Type { |
| LinearFunction, CubicBezierFunction, StepsFunction |
| }; |
| |
| virtual ~TimingFunction() { } |
| |
| Type type() const { return m_type; } |
| |
| virtual String toString() const = 0; |
| |
| // Evaluates the timing function at the given fraction. The accuracy parameter provides a hint as to the required |
| // accuracy and is not guaranteed. |
| virtual double evaluate(double fraction, double accuracy) const = 0; |
| |
| // This function returns the minimum and maximum values obtainable when |
| // calling evaluate(); |
| virtual void range(double* minValue, double* maxValue) const = 0; |
| |
| protected: |
| TimingFunction(Type type) |
| : m_type(type) |
| { |
| } |
| |
| private: |
| Type m_type; |
| }; |
| |
| class PLATFORM_EXPORT LinearTimingFunction final : public TimingFunction { |
| public: |
| static LinearTimingFunction* shared() |
| { |
| DEFINE_STATIC_REF(LinearTimingFunction, linear, (adoptRef(new LinearTimingFunction()))); |
| return linear; |
| } |
| |
| virtual ~LinearTimingFunction() { } |
| |
| virtual String toString() const override; |
| |
| virtual double evaluate(double fraction, double) const override; |
| |
| virtual void range(double* minValue, double* maxValue) const override; |
| private: |
| LinearTimingFunction() |
| : TimingFunction(LinearFunction) |
| { |
| } |
| }; |
| |
| class PLATFORM_EXPORT CubicBezierTimingFunction final : public TimingFunction { |
| public: |
| enum SubType { |
| Ease, |
| EaseIn, |
| EaseOut, |
| EaseInOut, |
| Custom |
| }; |
| |
| static PassRefPtr<CubicBezierTimingFunction> create(double x1, double y1, double x2, double y2) |
| { |
| return adoptRef(new CubicBezierTimingFunction(Custom, x1, y1, x2, y2)); |
| } |
| |
| static CubicBezierTimingFunction* preset(SubType subType) |
| { |
| switch (subType) { |
| case Ease: |
| { |
| DEFINE_STATIC_REF(CubicBezierTimingFunction, ease, (adoptRef(new CubicBezierTimingFunction(Ease, 0.25, 0.1, 0.25, 1.0)))); |
| return ease; |
| } |
| case EaseIn: |
| { |
| DEFINE_STATIC_REF(CubicBezierTimingFunction, easeIn, (adoptRef(new CubicBezierTimingFunction(EaseIn, 0.42, 0.0, 1.0, 1.0)))); |
| return easeIn; |
| } |
| case EaseOut: |
| { |
| DEFINE_STATIC_REF(CubicBezierTimingFunction, easeOut, (adoptRef(new CubicBezierTimingFunction(EaseOut, 0.0, 0.0, 0.58, 1.0)))); |
| return easeOut; |
| } |
| case EaseInOut: |
| { |
| DEFINE_STATIC_REF(CubicBezierTimingFunction, easeInOut, (adoptRef(new CubicBezierTimingFunction(EaseInOut, 0.42, 0.0, 0.58, 1.0)))); |
| return easeInOut; |
| } |
| default: |
| ASSERT_NOT_REACHED(); |
| return 0; |
| } |
| } |
| |
| virtual ~CubicBezierTimingFunction() { } |
| |
| virtual String toString() const override; |
| |
| virtual double evaluate(double fraction, double accuracy) const override; |
| virtual void range(double* minValue, double* maxValue) const override; |
| |
| double x1() const { return m_x1; } |
| double y1() const { return m_y1; } |
| double x2() const { return m_x2; } |
| double y2() const { return m_y2; } |
| |
| SubType subType() const { return m_subType; } |
| |
| private: |
| explicit CubicBezierTimingFunction(SubType subType, double x1, double y1, double x2, double y2) |
| : TimingFunction(CubicBezierFunction) |
| , m_x1(x1) |
| , m_y1(y1) |
| , m_x2(x2) |
| , m_y2(y2) |
| , m_subType(subType) |
| { |
| } |
| |
| double m_x1; |
| double m_y1; |
| double m_x2; |
| double m_y2; |
| SubType m_subType; |
| mutable OwnPtr<UnitBezier> m_bezier; |
| }; |
| |
| class PLATFORM_EXPORT StepsTimingFunction final : public TimingFunction { |
| public: |
| enum SubType { |
| Start, |
| End, |
| Middle, |
| Custom |
| }; |
| |
| enum StepAtPosition { |
| StepAtStart, |
| StepAtMiddle, |
| StepAtEnd |
| }; |
| |
| static PassRefPtr<StepsTimingFunction> create(int steps, StepAtPosition stepAtPosition) |
| { |
| return adoptRef(new StepsTimingFunction(Custom, steps, stepAtPosition)); |
| } |
| |
| static StepsTimingFunction* preset(SubType subType) |
| { |
| switch (subType) { |
| case Start: |
| { |
| DEFINE_STATIC_REF(StepsTimingFunction, start, (adoptRef(new StepsTimingFunction(Start, 1, StepAtStart)))); |
| return start; |
| } |
| case Middle: |
| { |
| DEFINE_STATIC_REF(StepsTimingFunction, middle, (adoptRef(new StepsTimingFunction(Middle, 1, StepAtMiddle)))); |
| return middle; |
| } |
| case End: |
| { |
| DEFINE_STATIC_REF(StepsTimingFunction, end, (adoptRef(new StepsTimingFunction(End, 1, StepAtEnd)))); |
| return end; |
| } |
| default: |
| ASSERT_NOT_REACHED(); |
| return 0; |
| } |
| } |
| |
| |
| virtual ~StepsTimingFunction() { } |
| |
| virtual String toString() const override; |
| |
| virtual double evaluate(double fraction, double) const override; |
| |
| virtual void range(double* minValue, double* maxValue) const override; |
| int numberOfSteps() const { return m_steps; } |
| StepAtPosition stepAtPosition() const { return m_stepAtPosition; } |
| |
| SubType subType() const { return m_subType; } |
| |
| private: |
| StepsTimingFunction(SubType subType, int steps, StepAtPosition stepAtPosition) |
| : TimingFunction(StepsFunction) |
| , m_steps(steps) |
| , m_stepAtPosition(stepAtPosition) |
| , m_subType(subType) |
| { |
| } |
| |
| int m_steps; |
| StepAtPosition m_stepAtPosition; |
| SubType m_subType; |
| }; |
| |
| PLATFORM_EXPORT bool operator==(const LinearTimingFunction&, const TimingFunction&); |
| PLATFORM_EXPORT bool operator==(const CubicBezierTimingFunction&, const TimingFunction&); |
| PLATFORM_EXPORT bool operator==(const StepsTimingFunction&, const TimingFunction&); |
| |
| PLATFORM_EXPORT bool operator==(const TimingFunction&, const TimingFunction&); |
| PLATFORM_EXPORT bool operator!=(const TimingFunction&, const TimingFunction&); |
| |
| #define DEFINE_TIMING_FUNCTION_TYPE_CASTS(typeName) \ |
| DEFINE_TYPE_CASTS( \ |
| typeName##TimingFunction, TimingFunction, value, \ |
| value->type() == TimingFunction::typeName##Function, \ |
| value.type() == TimingFunction::typeName##Function) |
| |
| DEFINE_TIMING_FUNCTION_TYPE_CASTS(Linear); |
| DEFINE_TIMING_FUNCTION_TYPE_CASTS(CubicBezier); |
| DEFINE_TIMING_FUNCTION_TYPE_CASTS(Steps); |
| |
| } // namespace blink |
| |
| #endif // SKY_ENGINE_PLATFORM_ANIMATION_TIMINGFUNCTION_H_ |