PassOwnPtr<InterpolableValue> FilterInterpolationFunctions::createNoneValue(const NonInterpolableValue& untypedNonInterpolableValue)
{
switch (toFilterNonInterpolableValue(untypedNonInterpolableValue).type()) {
case FilterOperation::GRAYSCALE:
case FilterOperation::INVERT:
case FilterOperation::SEPIA:
case FilterOperation::HUE_ROTATE:
return InterpolableNumber::create(0);
case FilterOperation::BRIGHTNESS:
case FilterOperation::CONTRAST:
case FilterOperation::OPACITY:
case FilterOperation::SATURATE:
return InterpolableNumber::create(1);
case FilterOperation::BLUR:
return CSSLengthInterpolationType::createNeutralInterpolableValue();
case FilterOperation::DROP_SHADOW:
return ShadowInterpolationFunctions::createNeutralInterpolableValue();
default:
ASSERT_NOT_REACHED();
return nullptr;
}
}
FilterOperation* FilterInterpolationFunctions::createFilter(
const InterpolableValue& interpolableValue,
const NonInterpolableValue& untypedNonInterpolableValue,
const StyleResolverState& state) {
const FilterNonInterpolableValue& nonInterpolableValue =
toFilterNonInterpolableValue(untypedNonInterpolableValue);
FilterOperation::OperationType type = nonInterpolableValue.type();
switch (type) {
case FilterOperation::GRAYSCALE:
case FilterOperation::HUE_ROTATE:
case FilterOperation::SATURATE:
case FilterOperation::SEPIA: {
double value =
clampParameter(toInterpolableNumber(interpolableValue).value(), type);
return BasicColorMatrixFilterOperation::create(value, type);
}
case FilterOperation::BRIGHTNESS:
case FilterOperation::CONTRAST:
case FilterOperation::INVERT:
case FilterOperation::OPACITY: {
double value =
clampParameter(toInterpolableNumber(interpolableValue).value(), type);
return BasicComponentTransferFilterOperation::create(value, type);
}
case FilterOperation::BLUR: {
Length stdDeviation = LengthInterpolationFunctions::createLength(
interpolableValue, nonInterpolableValue.typeNonInterpolableValue(),
state.cssToLengthConversionData(), ValueRangeNonNegative);
return BlurFilterOperation::create(stdDeviation);
}
case FilterOperation::DROP_SHADOW: {
ShadowData shadowData = ShadowInterpolationFunctions::createShadowData(
interpolableValue, nonInterpolableValue.typeNonInterpolableValue(),
state);
Color color = shadowData.color().isCurrentColor()
? Color::black
: shadowData.color().getColor();
return DropShadowFilterOperation::create(
IntPoint(shadowData.x(), shadowData.y()), shadowData.blur(), color);
}
default:
NOTREACHED();
return nullptr;
}
}
bool FilterInterpolationFunctions::filtersAreCompatible(const NonInterpolableValue& a, const NonInterpolableValue& b)
{
return toFilterNonInterpolableValue(a).type() == toFilterNonInterpolableValue(b).type();
}
