third_party/WebKit/public/platform/WebFloatAnimationCurve.h

   1 /*
   2  * Copyright (C) 2012 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1.  Redistributions of source code must retain the above copyright
   8  *     notice, this list of conditions and the following disclaimer.
   9  * 2.  Redistributions in binary form must reproduce the above copyright
  10  *     notice, this list of conditions and the following disclaimer in the
  11  *     documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  16  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  17  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  20  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  22  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  */
  24
  25 #ifndef WebFloatAnimationCurve_h
  26 #define WebFloatAnimationCurve_h
  27
  28 #include "WebCompositorAnimationCurve.h"
  29
  30 #include "WebCommon.h"
  31 #include "WebFloatKeyframe.h"
  32
  33 namespace blink {
  34
  35 // A keyframed float animation curve.
  36 class WebFloatAnimationCurve : public WebCompositorAnimationCurve {
  37 public:
  38     virtual ~WebFloatAnimationCurve() { }
  39
  40     // Adds the keyframe with the default timing function (ease).
  41     virtual void add(const WebFloatKeyframe&) = 0;
  42     virtual void add(const WebFloatKeyframe&, TimingFunctionType) = 0;
  43     // Adds the keyframe with a custom, bezier timing function. Note, it is
  44     // assumed that x0 = y0 = 0, and x3 = y3 = 1.
  45     virtual void add(const WebFloatKeyframe&, double x1, double y1, double x2, double y2) = 0;
  46     // Adds the keyframe with a steps timing function.
  47     virtual void add(const WebFloatKeyframe&, int steps, float stepsStartOffset) = 0;
  48
  49     virtual void setLinearTimingFunction() = 0;
  50     virtual void setCubicBezierTimingFunction(TimingFunctionType) = 0;
  51     virtual void setCubicBezierTimingFunction(double x1, double y1, double x2, double y2) = 0;
  52     virtual void setStepsTimingFunction(int numberOfSteps, float stepsStartOffset) = 0;
  53
  54     virtual float getValue(double time) const = 0;
  55 };
  56
  57 } // namespace blink
  58
  59 #endif // WebFloatAnimationCurve_h