ColorLookupTable.h

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// SPDX-FileCopyrightText: Copyright (c) OpenGeoSys Community (opengeosys.org)
// SPDX-License-Identifier: BSD-3-Clause
 
#pragma once
 
#include <cassert>
#include <tuple>
#include <utility>
#include <vector>
 
#include "Applications/DataHolderLib/Color.h"
 
namespace DataHolderLib
{

enum class LUTType {
    NONE = 0,
    LINEAR = 1,
    EXPONENTIAL = 2,
    SIGMOID = 3 // not yet implemented
};

class ColorLookupTable
{
public:
    ColorLookupTable();
 
    void setColor(double id, DataHolderLib::Color const& color);
 
    void setColor(std::string const& name, DataHolderLib::Color const& color);
 
    DataHolderLib::LUTType getInterpolationType() const { return _type; }
 
    void setInterpolationType(LUTType type) { _type = type; }
 
    std::size_t size() const { return _lut.size(); }
 
    std::pair<double, double> getTableRange() const { return _range; }
 
    void setTableRange(double min, double max);
 
    std::tuple<double, Color, std::string> const& operator[](std::size_t i) const
    {
        assert (i < _lut.size());
        return _lut[i];
    }
 
private:
    std::vector< std::tuple<double, Color, std::string> > _lut;
    LUTType _type{DataHolderLib::LUTType::LINEAR};
    std::pair<double, double> _range;
};
 
}  // namespace DataHolderLib