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/*
* Copyright 2010 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkFlingState_DEFINED
#define SkFlingState_DEFINED
#include "SkScalar.h"
#include "SkPoint.h"
class SkMatrix;
struct FlingState {
FlingState() : fActive(false) {}
bool isActive() const { return fActive; }
void stop() { fActive = false; }
void reset(float sx, float sy);
bool evaluateMatrix(SkMatrix* matrix);
private:
SkPoint fDirection;
SkScalar fSpeed0;
double fTime0;
bool fActive;
};
class GrAnimateFloat {
public:
GrAnimateFloat();
void start(float v0, float v1, float duration);
bool isActive() const { return fTime0 != 0; }
void stop() { fTime0 = 0; }
float evaluate();
private:
float fValue0, fValue1, fDuration;
SkMSec fTime0;
};
#endif
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