C++ KeyframeAnimation类代码示例

void CompositeAnimationPrivate::styleAvailable()
{
    if (m_numStyleAvailableWaiters == 0)
        return;

    // We have to go through animations in the order in which they appear in
    // the style, because order matters for additivity.
    Vector<RefPtr<KeyframeAnimation> > animations(m_keyframeAnimations.size());
    copyValuesToVector(m_keyframeAnimations, animations);

    if (animations.size() > 1)
        std::stable_sort(animations.begin(), animations.end(), compareAnimationIndices);

    for (size_t i = 0; i < animations.size(); ++i) {
        KeyframeAnimation* anim = animations[i].get();
        if (anim && anim->waitingForStyleAvailable())
            anim->updateStateMachine(AnimationBase::AnimationStateInputStyleAvailable, -1);
    }

    CSSPropertyTransitionsMap::const_iterator end = m_transitions.end();
    for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != end; ++it) {
        ImplicitAnimation* anim = it->second.get();
        if (anim && anim->waitingForStyleAvailable())
            anim->updateStateMachine(AnimationBase::AnimationStateInputStyleAvailable, -1);
    }
}

double CompositeAnimation::timeToNextService() const
{
    // Returns the time at which next service is required. -1 means no service is required. 0 means 
    // service is required now, and > 0 means service is required that many seconds in the future.
    double minT = -1;
    
    if (!m_transitions.isEmpty()) {
        CSSPropertyTransitionsMap::const_iterator transitionsEnd = m_transitions.end();
        for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != transitionsEnd; ++it) {
            ImplicitAnimation* transition = it->second.get();
            double t = transition ? transition->timeToNextService() : -1;
            if (t < minT || minT == -1)
                minT = t;
            if (minT == 0)
                return 0;
        }
    }
    if (!m_keyframeAnimations.isEmpty()) {
        m_keyframeAnimations.checkConsistency();
        AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();
        for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
            KeyframeAnimation* animation = it->second.get();
            double t = animation ? animation->timeToNextService() : -1;
            if (t < minT || minT == -1)
                minT = t;
            if (minT == 0)
                return 0;
        }
    }

    return minT;
}

unsigned CompositeAnimation::numberOfActiveAnimations() const
{
    unsigned count = 0;
    
    if (!m_keyframeAnimations.isEmpty()) {
        m_keyframeAnimations.checkConsistency();
        AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();
        for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
            KeyframeAnimation* anim = it->value.get();
            if (anim->running())
                ++count;
        }
    }

    if (!m_transitions.isEmpty()) {
        CSSPropertyTransitionsMap::const_iterator transitionsEnd = m_transitions.end();
        for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != transitionsEnd; ++it) {
            ImplicitAnimation* anim = it->value.get();
            if (anim->running())
                ++count;
        }
    }
    
    return count;
}

void CompositeAnimation::resumeAnimations()
{
    if (!m_suspended)
        return;

    m_suspended = false;

    if (!m_keyframeAnimations.isEmpty()) {
        m_keyframeAnimations.checkConsistency();
        AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();
        for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
            KeyframeAnimation* anim = it->value.get();
            if (anim && anim->playStatePlaying())
                anim->updatePlayState(AnimPlayStatePlaying);
        }
    }

    if (!m_transitions.isEmpty()) {
        CSSPropertyTransitionsMap::const_iterator transitionsEnd = m_transitions.end();
        for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != transitionsEnd; ++it) {
            ImplicitAnimation* anim = it->value.get();
            if (anim && anim->hasStyle())
                anim->updatePlayState(AnimPlayStatePlaying);
        }
    }
}

/*!
 @brief returns the two keyframes for a given time. 
 @param keyframes - a map with all keyframes of type KeyframeAnimation
 @param time - the time fraction between 0 and 1. 
 @param k0, reference to the first keyframe
 @param k2, reference to the second keyframe
 @return the number of keyframes. 1 if the time is equal to a keyframe, otherwise 2.
 */
int getKeyframes( KeyframeAnimation& keyframes, const double time, Keyframe& k0, Keyframe& k1)
{
    int num_keyframes = 0;
    
    // get a keyframe iterator
    KeyframeAnimation::iterator k_itr = keyframes.lower_bound(time);
    
    Keyframe k0_temp, k1_temp;
    
    // Obtain the first keyframe
    k1 = (*k_itr).second; num_keyframes++;
    
    
    // Check whether we are not at the beginning of this map
    if(k_itr != keyframes.begin())
    {
        k_itr--;  // decrement
        k0 = (*k_itr).second; // obtain the second keyframe
        num_keyframes++;
    }
  
    // write the first keyframe into k0 if we only have one
    if(num_keyframes == 1)
    {
        k0 = k1;
    }
  
    return num_keyframes;
    
}

void CompositeAnimationPrivate::setAnimationStartTime(double t)
{
    // Set start time on all animations waiting for it
    AnimationNameMap::const_iterator end = m_keyframeAnimations.end();
    for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != end; ++it) {
        KeyframeAnimation* anim = it->second.get();
        if (anim && anim->waitingForStartTime())
            anim->updateStateMachine(AnimationBase::AnimationStateInputStartTimeSet, t);
    }
}

void CompositeAnimation::setAnimationStartTime(double t)
{
    // set start time on all animations waiting for it
    AnimationNameMap::const_iterator kfend = m_keyframeAnimations.end();
    for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != kfend; ++it) {
        KeyframeAnimation* anim = it->second;
        if (anim && anim->waitingForStartTime())
            anim->updateStateMachine(AnimationBase::STATE_INPUT_START_TIME_SET, t);
    }
}

Animation *	GameObject::FrameInterpolateAnimation(int32 startFrame, int32 endFrame, float32 time, int32 track)
{
	KeyframeData * data = new KeyframeData();
	data->AddKeyframe(startFrame, 0.0f);
	data->AddKeyframe(endFrame, time);
	KeyframeAnimation * animation = new KeyframeAnimation(this, &localDrawState.frame, data, time);
	SafeRelease(data);
	animation->Start(track);
	return animation;
}

// "animating" means that something is running that requires the timer to keep firing
void CompositeAnimationPrivate::setAnimating(bool animating)
{
    CSSPropertyTransitionsMap::const_iterator transitionsEnd = m_transitions.end();
    for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != transitionsEnd; ++it) {
        ImplicitAnimation* transition = it->second.get();
        transition->setAnimating(animating);
    }

    AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();
    for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
        KeyframeAnimation* anim = it->second.get();
        anim->setAnimating(animating);
    }
}

// "animating" means that something is running that requires the timer to keep firing
// (e.g. a transition)
void CompositeAnimation::setAnimating(bool inAnimating)
{
    CSSPropertyTransitionsMap::const_iterator end = m_transitions.end();
    for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != end; ++it) {
        ImplicitAnimation*  transition = it->second;
        transition->setAnimating(inAnimating);
    }

    AnimationNameMap::const_iterator kfend = m_keyframeAnimations.end();
    for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != kfend; ++it) {
        KeyframeAnimation* anim = it->second;
        anim->setAnimating(inAnimating);
    }
}

bool CompositeAnimation::isAnimatingProperty(int property, bool isRunningNow) const
{
    AnimationNameMap::const_iterator kfend = m_keyframeAnimations.end();
    for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != kfend; ++it) {
        KeyframeAnimation* anim = it->second;
        if (anim && anim->isAnimatingProperty(property, isRunningNow))
            return true;
    }
    
    CSSPropertyTransitionsMap::const_iterator end = m_transitions.end();
    for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != end; ++it) {
        ImplicitAnimation* anim = it->second;
        if (anim && anim->isAnimatingProperty(property, isRunningNow))
            return true;
    }
    return false;
}

// "animating" means that something is running that requires the timer to keep firing
void CompositeAnimation::setAnimating(bool animating)
{
    if (!m_transitions.isEmpty()) {
        CSSPropertyTransitionsMap::const_iterator transitionsEnd = m_transitions.end();
        for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != transitionsEnd; ++it) {
            ImplicitAnimation* transition = it->second.get();
            transition->setAnimating(animating);
        }
    }
    if (!m_keyframeAnimations.isEmpty()) {
        m_keyframeAnimations.checkConsistency();
        AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();
        for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
            KeyframeAnimation* anim = it->second.get();
            anim->setAnimating(animating);
        }
    }
}

void CompositeAnimationPrivate::clearRenderer()
{
    // Clear the renderers from all running animations, in case we are in the middle of
    // an animation callback (see https://bugs.webkit.org/show_bug.cgi?id=22052)
    CSSPropertyTransitionsMap::const_iterator transitionsEnd = m_transitions.end();
    for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != transitionsEnd; ++it) {
        ImplicitAnimation* transition = it->second.get();
        transition->clearRenderer();
    }

    AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();
    for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
        KeyframeAnimation* anim = it->second.get();
        anim->clearRenderer();
    }
    

}

bool CompositeAnimation::animating()
{
    CSSPropertyTransitionsMap::const_iterator end = m_transitions.end();
    for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != end; ++it) {
        ImplicitAnimation*  transition = it->second;
        if (transition && transition->animating() && transition->running())
            return true;
    }
    
    AnimationNameMap::const_iterator kfend = m_keyframeAnimations.end();
    for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != kfend; ++it) {
        KeyframeAnimation* anim = it->second;
        if (anim && !anim->paused() && anim->animating() && anim->active())
            return true;
    }

    return false;
}

void CompositeAnimation::resumeAnimations()
{
    if (!m_suspended)
        return;
    
    m_suspended = false;
    
    AnimationNameMap::const_iterator kfend = m_keyframeAnimations.end();
    for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != kfend; ++it) {
        KeyframeAnimation* anim = it->second;
        if (anim && anim->playStatePlaying())
            anim->updatePlayState(true);
    }
    
    CSSPropertyTransitionsMap::const_iterator end = m_transitions.end();
    for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != end; ++it) {
        ImplicitAnimation* anim = it->second;
        if (anim && anim->hasStyle())
            anim->updatePlayState(true);
    }
}