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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.
#include "config.h"
#include "CCTimingFunction.h"
namespace {
const double epsilon = 1e-6;
} // namespace
namespace cc {
CCTimingFunction::CCTimingFunction()
{
}
CCTimingFunction::~CCTimingFunction()
{
}
double CCTimingFunction::duration() const
{
return 1.0;
}
scoped_ptr<CCCubicBezierTimingFunction> CCCubicBezierTimingFunction::create(double x1, double y1, double x2, double y2)
{
return make_scoped_ptr(new CCCubicBezierTimingFunction(x1, y1, x2, y2));
}
CCCubicBezierTimingFunction::CCCubicBezierTimingFunction(double x1, double y1, double x2, double y2)
: m_curve(x1, y1, x2, y2)
{
}
CCCubicBezierTimingFunction::~CCCubicBezierTimingFunction()
{
}
float CCCubicBezierTimingFunction::getValue(double x) const
{
UnitBezier temp(m_curve);
return static_cast<float>(temp.solve(x, epsilon));
}
scoped_ptr<CCAnimationCurve> CCCubicBezierTimingFunction::clone() const
{
return make_scoped_ptr(new CCCubicBezierTimingFunction(*this)).PassAs<CCAnimationCurve>();
}
// These numbers come from http://www.w3.org/TR/css3-transitions/#transition-timing-function_tag.
scoped_ptr<CCTimingFunction> CCEaseTimingFunction::create()
{
return CCCubicBezierTimingFunction::create(0.25, 0.1, 0.25, 1).PassAs<CCTimingFunction>();
}
scoped_ptr<CCTimingFunction> CCEaseInTimingFunction::create()
{
return CCCubicBezierTimingFunction::create(0.42, 0, 1.0, 1).PassAs<CCTimingFunction>();
}
scoped_ptr<CCTimingFunction> CCEaseOutTimingFunction::create()
{
return CCCubicBezierTimingFunction::create(0, 0, 0.58, 1).PassAs<CCTimingFunction>();
}
scoped_ptr<CCTimingFunction> CCEaseInOutTimingFunction::create()
{
return CCCubicBezierTimingFunction::create(0.42, 0, 0.58, 1).PassAs<CCTimingFunction>();
}
} // namespace cc
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