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);
}
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);
}
