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);
}
PassOwnPtr<InterpolationValue> InvalidatableInterpolation::convertSingleKeyframe(const PropertySpecificKeyframe& keyframe, const InterpolationEnvironment& environment, const UnderlyingValue& underlyingValue) const
{
if (keyframe.isNeutral() && !underlyingValue)
return nullptr;
for (const auto& interpolationType : m_interpolationTypes) {
if (keyframe.isNeutral() && underlyingValue->type() != *interpolationType)
continue;
OwnPtr<InterpolationValue> result = interpolationType->maybeConvertSingle(keyframe, environment, underlyingValue, m_conversionCheckers);
if (result) {
ASSERT(result->type() == *interpolationType);
return result.release();
}
}
ASSERT(keyframe.isNeutral());
return nullptr;
}
bool InvalidatableInterpolation::isCacheValid(const InterpolationEnvironment& environment, const UnderlyingValue& underlyingValue) 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 (!underlyingValue || !m_cachedValue || m_cachedValue->type() != underlyingValue->type())
return false;
}
for (const auto& checker : m_conversionCheckers) {
if (!checker->isValid(environment, underlyingValue))
return false;
}
return true;
}
PassOwnPtr<PairwisePrimitiveInterpolation> InvalidatableInterpolation::maybeConvertPairwise(const InterpolationEnvironment& environment, const UnderlyingValue& underlyingValue) const
{
ASSERT(m_currentFraction != 0 && m_currentFraction != 1);
for (const auto& interpolationType : m_interpolationTypes) {
if ((m_startKeyframe->isNeutral() || m_endKeyframe->isNeutral()) && (!underlyingValue || underlyingValue->type() != *interpolationType))
continue;
OwnPtr<PairwisePrimitiveInterpolation> pairwiseConversion = interpolationType->maybeConvertPairwise(*m_startKeyframe, *m_endKeyframe, environment, underlyingValue, m_conversionCheckers);
if (pairwiseConversion) {
ASSERT(pairwiseConversion->type() == *interpolationType);
return pairwiseConversion.release();
}
}
return nullptr;
}