imageColor.hpp

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// @copyright
// (c) Copyright ESO 2020
// All Rights Reserved
// ESO (eso.org) is an Intergovernmental Organization, and therefore special
// legal conditions apply.
//
// @file imageColor.hpp
// @brief Image Color class, offers access to color map related functions.
//
// This file is part of the DDT Image Handling Library and
// provides functions for color map purposes.
//
// @author Christoph Bortlisz, CGI
// @since  2020/09/10
//
 
#ifndef IMAGECOLOR_HPP
#define IMAGECOLOR_HPP
 
#include <sys/stat.h>
 
#include <algorithm>
#include <cctype>
#include <unordered_map>
 
#include "boost/filesystem.hpp"
 
#include <cpl.h>
#undef I
#undef arg
 
#include "ddt/dataAcquisition.hpp"
#include "ddt/dataFile.hpp"
#include "ddt/ddtLogger.hpp"
#include "ddt/imageError.hpp"
#include "ddt/imageIO.hpp"
#include "ddt/imageProc.hpp"
#include "ddt/imageStats.hpp"
 
namespace ddt {
 
constexpr size_t MAX_SCALING_LUT_ENTRIES = 65536;
constexpr uint MAX_SCALING_LUT_VALUE = 65535;
constexpr size_t MAX_COLOR_MAP_ENTRIES = 256;
constexpr size_t MAX_COLOR_MAP_VALUE = 255;
constexpr size_t COLOR_MAP_ENTRY_SIZE = 3;
 
typedef std::array<std::array<float, COLOR_MAP_ENTRY_SIZE>,
                   MAX_COLOR_MAP_ENTRIES>
    colorMap_t;
 
typedef std::array<unsigned int, MAX_COLOR_MAP_ENTRIES> colorMapARGB_t;
 
typedef struct scalingLut_t {
  std::array<uint, MAX_SCALING_LUT_ENTRIES> lut;
  double offset;
  double factor;
} scalingLut_t;
 
class ImageColor {
 public:
  ImageColor();
 
  virtual ~ImageColor();
 
  void set_logger(ddt::DdtLogger* const in_logger);
 
  void LoadColorMaps(const std::string color_map_folder);
 
  std::list<std::string> get_ColorMapsList() const;
 
  ddt::colorMap_t* get_ColorMap(const std::string color_map_name);
 
  ddt::colorMapARGB_t* get_ColorMapARGB(const std::string color_map_name);
 
  ddt::colorMap_t* get_GrayScaleColorMap();
 
  ddt::colorMapARGB_t* get_GrayScaleColorMapARGB();
 
  ddt::scalingLut_t* get_LinearScalingLut(const double cut_level_min,
                                          const double cut_level_max);
 
  ddt::scalingLut_t* get_LogarithmicScalingLut(const double cut_level_min,
                                               const double cut_level_max);
 
  ddt::scalingLut_t* get_SqrtScalingLut(const double cut_level_min,
                                        const double cut_level_max);
 
 protected:
  ddt::DdtLogger* logger;
 
 private:
  void initialize();
 
  void loadColorMap(std::string color_map_name);
 
  void loadGrayScaleColorMap();
 
  void calculateScalingParameter(const double cut_level_min,
                                 const double cut_level_max,
                                 double* const pixval_range,
                                 double* const offset, double* const factor,
                                 int* const cut_level_min_tmp,
                                 int* const cut_level_max_tmp) const;
  std::unordered_map<std::string, ddt::colorMap_t> colorMaps;
 
  std::unordered_map<std::string, ddt::colorMapARGB_t> colorMapsARGB;
 
  scalingLut_t linearScalingLut;
 
  scalingLut_t logScalingLut;
 
  scalingLut_t sqrtScalingLut;
};
 
}  // namespace ddt
 
#endif /* IMAGECOLOR_HPP */