Function expandRamp

src/IECoreScene/ShaderNetworkAlgo.cpp:820–854

template<typename Ramp>
int expandRamp( const InternedString &name, const Ramp &ramp, CompoundDataMap &newParameters, const std::string &shaderName )
{
	StringDataPtr basisData = new StringData();
	std::string &basis = basisData->writable();

	typedef TypedData< vector<typename Ramp::XType> > XTypedVectorData;
	typename XTypedVectorData::Ptr positionsData = new XTypedVectorData();
	auto &positions = positionsData->writable();
	positions.reserve( ramp.points.size() );
	typedef TypedData< vector<typename Ramp::YType> > YTypedVectorData;
	typename YTypedVectorData::Ptr valuesData = new YTypedVectorData();
	auto &values = valuesData->writable();

	ramp.toOSL( basis, positions, values );

	auto [ positionsSuffix, floatValuesSuffix, colorValuesSuffix, basisSuffix, countSuffix ] = lookupRampParameterSuffixes( shaderName );

	newParameters[ name.string() + *positionsSuffix ] = positionsData;
	if constexpr( std::is_same_v< typename Ramp::YType, float > )
	{
		newParameters[ name.string() + *floatValuesSuffix ] = valuesData;
	}
	else
	{
		newParameters[ name.string() + *colorValuesSuffix ] = valuesData;
	}
	newParameters[ name.string() + *basisSuffix ] = basisData;

	if( countSuffix )
	{
		newParameters[ name.string() + *countSuffix ] = new IntData( positionsData->readable().size() );
	}

	return positionsData->readable().size();
}

void ensureParametersCopy(
	const IECore::CompoundDataMap &parameters,