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// 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 CCAnimationCurve_h
#define CCAnimationCurve_h
#include "base/memory/scoped_ptr.h"
#include <public/WebTransformationMatrix.h>
namespace cc {
class CCFloatAnimationCurve;
class CCTransformAnimationCurve;
class IntSize;
class TransformOperations;
// An animation curve is a function that returns a value given a time.
// There are currently only two types of curve, float and transform.
class CCAnimationCurve {
public:
enum Type { Float, Transform };
virtual ~CCAnimationCurve() { }
virtual double duration() const = 0;
virtual Type type() const = 0;
virtual scoped_ptr<CCAnimationCurve> clone() const = 0;
const CCFloatAnimationCurve* toFloatAnimationCurve() const;
const CCTransformAnimationCurve* toTransformAnimationCurve() const;
};
class CCFloatAnimationCurve : public CCAnimationCurve {
public:
virtual ~CCFloatAnimationCurve() { }
virtual float getValue(double t) const = 0;
// Partial CCAnimation implementation.
virtual Type type() const OVERRIDE;
};
class CCTransformAnimationCurve : public CCAnimationCurve {
public:
virtual ~CCTransformAnimationCurve() { }
virtual WebKit::WebTransformationMatrix getValue(double t) const = 0;
// Partial CCAnimation implementation.
virtual Type type() const OVERRIDE;
};
} // namespace cc
#endif // CCAnimation_h
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