PassOwnPtr<InterpolationValue> PathInterpolationFunctions::maybeConvertNeutral(const InterpolationType& type, const UnderlyingValue& underlyingValue, InterpolationType::ConversionCheckers& conversionCheckers)
{
conversionCheckers.append(UnderlyingPathSegTypesChecker::create(type, underlyingValue));
OwnPtr<InterpolableList> result = InterpolableList::create(PathComponentIndexCount);
result->set(PathArgsIndex, toInterpolableList(underlyingValue->interpolableValue()).get(PathArgsIndex)->cloneAndZero());
result->set(PathNeutralIndex, InterpolableNumber::create(1));
return InterpolationValue::create(type, result.release(),
const_cast<NonInterpolableValue*>(underlyingValue->nonInterpolableValue())); // Take ref.
}
void SVGNumberListInterpolationType::composite(UnderlyingValue& underlyingValue, double underlyingFraction, const InterpolationValue& value) const
{
const InterpolableList& list = toInterpolableList(value.interpolableValue());
if (toInterpolableList(underlyingValue->interpolableValue()).length() <= list.length())
padWithZeroes(underlyingValue.mutableComponent().interpolableValue, list.length());
InterpolableList& underlyingList = *toInterpolableList(underlyingValue.mutableComponent().interpolableValue.get());
ASSERT(underlyingList.length() >= list.length());
size_t i = 0;
for (; i < list.length(); i++)
underlyingList.getMutable(i)->scaleAndAdd(underlyingFraction, *list.get(i));
for (; i < underlyingList.length(); i++)
underlyingList.getMutable(i)->scale(underlyingFraction);
}
void InvalidatableInterpolation::applyStack(const ActiveInterpolations& interpolations, InterpolationEnvironment& environment)
{
ASSERT(!interpolations.isEmpty());
size_t startingIndex = 0;
// Compute the underlying value to composite onto.
UnderlyingValue underlyingValue;
const InvalidatableInterpolation& firstInterpolation = toInvalidatableInterpolation(*interpolations.at(startingIndex));
if (firstInterpolation.dependsOnUnderlyingValue()) {
underlyingValue.set(firstInterpolation.maybeConvertUnderlyingValue(environment));
} else {
const InterpolationValue* firstValue = firstInterpolation.ensureValidInterpolation(environment, UnderlyingValue());
// Fast path for replace interpolations that are the only one to apply.
if (interpolations.size() == 1) {
if (firstValue) {
firstInterpolation.setFlagIfInheritUsed(environment);
firstValue->type().apply(firstValue->interpolableValue(), firstValue->nonInterpolableValue(), environment);
}
return;
}
underlyingValue.set(firstValue);
startingIndex++;
}
// Composite interpolations onto the underlying value.
bool shouldApply = false;
for (size_t i = startingIndex; i < interpolations.size(); i++) {
const InvalidatableInterpolation& currentInterpolation = toInvalidatableInterpolation(*interpolations.at(i));
ASSERT(currentInterpolation.dependsOnUnderlyingValue());
const InterpolationValue* currentValue = currentInterpolation.ensureValidInterpolation(environment, underlyingValue);
if (!currentValue)
continue;
shouldApply = true;
currentInterpolation.setFlagIfInheritUsed(environment);
double underlyingFraction = currentInterpolation.underlyingFraction();
if (underlyingFraction == 0 || !underlyingValue || underlyingValue->type() != currentValue->type())
underlyingValue.set(currentValue);
else
currentValue->type().composite(underlyingValue, underlyingFraction, *currentValue);
}
if (shouldApply && underlyingValue)
underlyingValue->type().apply(underlyingValue->interpolableValue(), underlyingValue->nonInterpolableValue(), environment);
}