bool addToSVGPathByteStream(SVGPathByteStream& fromStream, const SVGPathByteStream& byStream, unsigned repeatCount)
{
    if (fromStream.isEmpty() || byStream.isEmpty())
        return true;

    OwnPtr<SVGPathByteStream> fromStreamCopy = fromStream.copy();
    fromStream.clear();

    SVGPathByteStreamBuilder builder(fromStream);
    SVGPathByteStreamSource fromSource(*fromStreamCopy);
    SVGPathByteStreamSource bySource(byStream);
    SVGPathBlender blender(&fromSource, &bySource, &builder);
    return blender.addAnimatedPath(repeatCount);
}
示例#2
0
void SVGAnimatedPathAnimator::calculateAnimatedValue(float percentage, unsigned repeatCount, SVGAnimatedType* from, SVGAnimatedType* to, SVGAnimatedType* toAtEndOfDuration, SVGAnimatedType* animated)
{
    ASSERT(m_animationElement);
    ASSERT(m_contextElement);

    SVGPathByteStream* fromPath = from->path();
    SVGPathByteStream* toPath = to->path();
    SVGPathByteStream* toAtEndOfDurationPath = toAtEndOfDuration->path();
    SVGPathByteStream* animatedPath = animated->path();

    OwnPtr<SVGPathByteStream> underlyingPath;
    bool isToAnimation = m_animationElement->animationMode() == ToAnimation;
    if (isToAnimation) {
        underlyingPath = animatedPath->copy();
        fromPath = underlyingPath.get();
    }

    // Cache the current animated value before the buildAnimatedSVGPathByteStream() clears animatedPath.
    OwnPtr<SVGPathByteStream> lastAnimatedPath;
    if (!fromPath->size() || (m_animationElement->isAdditive() && !isToAnimation))
        lastAnimatedPath = animatedPath->copy();

    // Pass false to 'resizeAnimatedListIfNeeded' here, as the path animation is not a regular Vector<SVGXXX> type, but a SVGPathByteStream, that works differently.
    if (!m_animationElement->adjustFromToListValues<SVGPathByteStream>(*fromPath, *toPath, *animatedPath, percentage, false))
        return;

    buildAnimatedSVGPathByteStream(fromPath, toPath, animatedPath, percentage);

    // Handle additive='sum'.
    if (lastAnimatedPath)
        addToSVGPathByteStream(animatedPath, lastAnimatedPath.get());

    // Handle accumulate='sum'.
    if (m_animationElement->isAccumulated() && repeatCount)
        addToSVGPathByteStream(animatedPath, toAtEndOfDurationPath, repeatCount);
}