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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 "CCKeyframedAnimationCurve.h"
using WebKit::WebTransformationMatrix;
namespace cc {
namespace {
template <class Keyframe>
void insertKeyframe(scoped_ptr<Keyframe> keyframe, ScopedPtrVector<Keyframe>& keyframes)
{
// Usually, the keyframes will be added in order, so this loop would be unnecessary and
// we should skip it if possible.
if (!keyframes.isEmpty() && keyframe->time() < keyframes.last()->time()) {
for (size_t i = 0; i < keyframes.size(); ++i) {
if (keyframe->time() < keyframes[i]->time()) {
keyframes.insert(i, keyframe.Pass());
return;
}
}
}
keyframes.append(keyframe.Pass());
}
scoped_ptr<CCTimingFunction> cloneTimingFunction(const CCTimingFunction* timingFunction)
{
ASSERT(timingFunction);
scoped_ptr<CCAnimationCurve> curve(timingFunction->clone());
return scoped_ptr<CCTimingFunction>(static_cast<CCTimingFunction*>(curve.release()));
}
} // namespace
CCKeyframe::CCKeyframe(double time, scoped_ptr<CCTimingFunction> timingFunction)
: m_time(time)
, m_timingFunction(timingFunction.Pass())
{
}
CCKeyframe::~CCKeyframe()
{
}
double CCKeyframe::time() const
{
return m_time;
}
const CCTimingFunction* CCKeyframe::timingFunction() const
{
return m_timingFunction.get();
}
scoped_ptr<CCFloatKeyframe> CCFloatKeyframe::create(double time, float value, scoped_ptr<CCTimingFunction> timingFunction)
{
return make_scoped_ptr(new CCFloatKeyframe(time, value, timingFunction.Pass()));
}
CCFloatKeyframe::CCFloatKeyframe(double time, float value, scoped_ptr<CCTimingFunction> timingFunction)
: CCKeyframe(time, timingFunction.Pass())
, m_value(value)
{
}
CCFloatKeyframe::~CCFloatKeyframe()
{
}
float CCFloatKeyframe::value() const
{
return m_value;
}
scoped_ptr<CCFloatKeyframe> CCFloatKeyframe::clone() const
{
scoped_ptr<CCTimingFunction> func;
if (timingFunction())
func = cloneTimingFunction(timingFunction());
return CCFloatKeyframe::create(time(), value(), func.Pass());
}
scoped_ptr<CCTransformKeyframe> CCTransformKeyframe::create(double time, const WebKit::WebTransformOperations& value, scoped_ptr<CCTimingFunction> timingFunction)
{
return make_scoped_ptr(new CCTransformKeyframe(time, value, timingFunction.Pass()));
}
CCTransformKeyframe::CCTransformKeyframe(double time, const WebKit::WebTransformOperations& value, scoped_ptr<CCTimingFunction> timingFunction)
: CCKeyframe(time, timingFunction.Pass())
, m_value(value)
{
}
CCTransformKeyframe::~CCTransformKeyframe()
{
}
const WebKit::WebTransformOperations& CCTransformKeyframe::value() const
{
return m_value;
}
scoped_ptr<CCTransformKeyframe> CCTransformKeyframe::clone() const
{
scoped_ptr<CCTimingFunction> func;
if (timingFunction())
func = cloneTimingFunction(timingFunction());
return CCTransformKeyframe::create(time(), value(), func.Pass());
}
scoped_ptr<CCKeyframedFloatAnimationCurve> CCKeyframedFloatAnimationCurve::create()
{
return make_scoped_ptr(new CCKeyframedFloatAnimationCurve);
}
CCKeyframedFloatAnimationCurve::CCKeyframedFloatAnimationCurve()
{
}
CCKeyframedFloatAnimationCurve::~CCKeyframedFloatAnimationCurve()
{
}
void CCKeyframedFloatAnimationCurve::addKeyframe(scoped_ptr<CCFloatKeyframe> keyframe)
{
insertKeyframe(keyframe.Pass(), m_keyframes);
}
double CCKeyframedFloatAnimationCurve::duration() const
{
return m_keyframes.last()->time() - m_keyframes.first()->time();
}
scoped_ptr<CCAnimationCurve> CCKeyframedFloatAnimationCurve::clone() const
{
scoped_ptr<CCKeyframedFloatAnimationCurve> toReturn(CCKeyframedFloatAnimationCurve::create());
for (size_t i = 0; i < m_keyframes.size(); ++i)
toReturn->addKeyframe(m_keyframes[i]->clone());
return toReturn.PassAs<CCAnimationCurve>();
}
float CCKeyframedFloatAnimationCurve::getValue(double t) const
{
if (t <= m_keyframes.first()->time())
return m_keyframes.first()->value();
if (t >= m_keyframes.last()->time())
return m_keyframes.last()->value();
size_t i = 0;
for (; i < m_keyframes.size() - 1; ++i) {
if (t < m_keyframes[i+1]->time())
break;
}
float progress = static_cast<float>((t - m_keyframes[i]->time()) / (m_keyframes[i+1]->time() - m_keyframes[i]->time()));
if (m_keyframes[i]->timingFunction())
progress = m_keyframes[i]->timingFunction()->getValue(progress);
return m_keyframes[i]->value() + (m_keyframes[i+1]->value() - m_keyframes[i]->value()) * progress;
}
scoped_ptr<CCKeyframedTransformAnimationCurve> CCKeyframedTransformAnimationCurve::create()
{
return make_scoped_ptr(new CCKeyframedTransformAnimationCurve);
}
CCKeyframedTransformAnimationCurve::CCKeyframedTransformAnimationCurve()
{
}
CCKeyframedTransformAnimationCurve::~CCKeyframedTransformAnimationCurve()
{
}
void CCKeyframedTransformAnimationCurve::addKeyframe(scoped_ptr<CCTransformKeyframe> keyframe)
{
insertKeyframe(keyframe.Pass(), m_keyframes);
}
double CCKeyframedTransformAnimationCurve::duration() const
{
return m_keyframes.last()->time() - m_keyframes.first()->time();
}
scoped_ptr<CCAnimationCurve> CCKeyframedTransformAnimationCurve::clone() const
{
scoped_ptr<CCKeyframedTransformAnimationCurve> toReturn(CCKeyframedTransformAnimationCurve::create());
for (size_t i = 0; i < m_keyframes.size(); ++i)
toReturn->addKeyframe(m_keyframes[i]->clone());
return toReturn.PassAs<CCAnimationCurve>();
}
WebTransformationMatrix CCKeyframedTransformAnimationCurve::getValue(double t) const
{
if (t <= m_keyframes.first()->time())
return m_keyframes.first()->value().apply();
if (t >= m_keyframes.last()->time())
return m_keyframes.last()->value().apply();
size_t i = 0;
for (; i < m_keyframes.size() - 1; ++i) {
if (t < m_keyframes[i+1]->time())
break;
}
double progress = (t - m_keyframes[i]->time()) / (m_keyframes[i+1]->time() - m_keyframes[i]->time());
if (m_keyframes[i]->timingFunction())
progress = m_keyframes[i]->timingFunction()->getValue(progress);
return m_keyframes[i+1]->value().blend(m_keyframes[i]->value(), progress);
}
} // namespace cc
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