cc/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_TIMING_FUNCTION_H_
   6 #define CC_TIMING_FUNCTION_H_
   7
   8 #include "cc/animation_curve.h"
   9 #include "cc/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  protected:
  23   TimingFunction();
  24 };
  25
  26 class CC_EXPORT CubicBezierTimingFunction : public TimingFunction {
  27  public:
  28   static scoped_ptr<CubicBezierTimingFunction> create(double x1, double y1,
  29                                                       double x2, double y2);
  30   virtual ~CubicBezierTimingFunction();
  31
  32   // Partial implementation of FloatAnimationCurve.
  33   virtual float getValue(double time) const OVERRIDE;
  34   virtual scoped_ptr<AnimationCurve> clone() const OVERRIDE;
  35
  36  protected:
  37   CubicBezierTimingFunction(double x1, double y1, double x2, double y2);
  38
  39   SkScalar x1_;
  40   SkScalar y1_;
  41   SkScalar x2_;
  42   SkScalar y2_;
  43 };
  44
  45 class CC_EXPORT EaseTimingFunction {
  46  public:
  47   static scoped_ptr<TimingFunction> create();
  48 };
  49
  50 class CC_EXPORT EaseInTimingFunction {
  51  public:
  52   static scoped_ptr<TimingFunction> create();
  53 };
  54
  55 class CC_EXPORT EaseOutTimingFunction {
  56  public:
  57   static scoped_ptr<TimingFunction> create();
  58 };
  59
  60 class CC_EXPORT EaseInOutTimingFunction {
  61  public:
  62   static scoped_ptr<TimingFunction> create();
  63 };
  64
  65 }  // namespace cc
  66
  67 #endif  // CC_TIMING_FUNCTION_H_