void InvalidatableInterpolation::applyStack(
const ActiveInterpolations& interpolations,
InterpolationEnvironment& environment) {
DCHECK(!interpolations.isEmpty());
size_t startingIndex = 0;
// Compute the underlying value to composite onto.
UnderlyingValueOwner underlyingValueOwner;
const InvalidatableInterpolation& firstInterpolation =
toInvalidatableInterpolation(*interpolations.at(startingIndex));
if (firstInterpolation.dependsOnUnderlyingValue()) {
underlyingValueOwner.set(
firstInterpolation.maybeConvertUnderlyingValue(environment));
} else {
const TypedInterpolationValue* firstValue =
firstInterpolation.ensureValidInterpolation(environment,
underlyingValueOwner);
// 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->getNonInterpolableValue(),
environment);
}
return;
}
underlyingValueOwner.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));
DCHECK(currentInterpolation.dependsOnUnderlyingValue());
const TypedInterpolationValue* currentValue =
currentInterpolation.ensureValidInterpolation(environment,
underlyingValueOwner);
if (!currentValue)
continue;
shouldApply = true;
currentInterpolation.setFlagIfInheritUsed(environment);
double underlyingFraction = currentInterpolation.underlyingFraction();
if (underlyingFraction == 0 || !underlyingValueOwner ||
underlyingValueOwner.type() != currentValue->type())
underlyingValueOwner.set(currentValue);
else
currentValue->type().composite(underlyingValueOwner, underlyingFraction,
currentValue->value(),
currentInterpolation.m_currentFraction);
}
if (shouldApply && underlyingValueOwner)
underlyingValueOwner.type().apply(
*underlyingValueOwner.value().interpolableValue,
underlyingValueOwner.value().nonInterpolableValue.get(), environment);
}
bool InvalidatableInterpolation::isCacheValid(
const InterpolationEnvironment& environment,
const UnderlyingValueOwner& underlyingValueOwner) const {
if (!m_isCached)
return false;
if (isNeutralKeyframeActive()) {
if (m_cachedPairConversion && m_cachedPairConversion->isFlip())
return false;
// Pairwise interpolation can never happen between different
// InterpolationTypes, neutral values always represent the underlying value.
if (!underlyingValueOwner || !m_cachedValue ||
m_cachedValue->type() != underlyingValueOwner.type())
return false;
}
for (const auto& checker : m_conversionCheckers) {
if (!checker->isValid(environment, underlyingValueOwner.value()))
return false;
}
return true;
}
std::unique_ptr<TypedInterpolationValue>
InvalidatableInterpolation::convertSingleKeyframe(
const PropertySpecificKeyframe& keyframe,
const InterpolationEnvironment& environment,
const UnderlyingValueOwner& underlyingValueOwner) const {
if (keyframe.isNeutral() && !underlyingValueOwner)
return nullptr;
for (const auto& interpolationType : m_interpolationTypes) {
if (keyframe.isNeutral() &&
underlyingValueOwner.type() != *interpolationType)
continue;
ConversionCheckers conversionCheckers;
InterpolationValue result = interpolationType->maybeConvertSingle(
keyframe, environment, underlyingValueOwner.value(),
conversionCheckers);
addConversionCheckers(*interpolationType, conversionCheckers);
if (result)
return TypedInterpolationValue::create(
*interpolationType, std::move(result.interpolableValue),
result.nonInterpolableValue.release());
}
DCHECK(keyframe.isNeutral());
return nullptr;
}
std::unique_ptr<PairwisePrimitiveInterpolation>
InvalidatableInterpolation::maybeConvertPairwise(
const InterpolationEnvironment& environment,
const UnderlyingValueOwner& underlyingValueOwner) const {
DCHECK(m_currentFraction != 0 && m_currentFraction != 1);
for (const auto& interpolationType : m_interpolationTypes) {
if ((m_startKeyframe->isNeutral() || m_endKeyframe->isNeutral()) &&
(!underlyingValueOwner ||
underlyingValueOwner.type() != *interpolationType))
continue;
ConversionCheckers conversionCheckers;
PairwiseInterpolationValue result = interpolationType->maybeConvertPairwise(
*m_startKeyframe, *m_endKeyframe, environment,
underlyingValueOwner.value(), conversionCheckers);
addConversionCheckers(*interpolationType, conversionCheckers);
if (result) {
return PairwisePrimitiveInterpolation::create(
*interpolationType, std::move(result.startInterpolableValue),
std::move(result.endInterpolableValue),
result.nonInterpolableValue.release());
}
}
return nullptr;
}