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- // This file is part of HDRip.
- //
- // HDRip is free software: you can redistribute it and/or modify it
- // under the terms of the GNU General Public License as published by
- // the Free Software Foundation, either version 3 of the License, or
- // (at your option) any later version.
- //
- // HDRip is distributed in the hope that it will be useful, but
- // WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU General Public License for more details.
- //
- // You should have received a copy of the GNU General Public License
- // along with HDRip. If not, see <https://www.gnu.org/licenses/>.
- //
- // HDRip project
- // Author : Rémi Synave
- // Contact : remi.synave@univ-littoral.fr
- #ifndef CONVERSION__HPP
- #define CONVERSION__HPP
- #include <cmath>
- #include <iostream>
- #include <tuple>
- class Conversion
- {
- public:
- static constexpr float sRGB_to_XYZ_m[3][3] = { { 0.4124f, 0.3576f, 0.1805f},
- { 0.2126f, 0.7152f, 0.0722f},
- { 0.0193f, 0.1192f, 0.9505f} };
- // More accurate matrix
- //static constexpr float RGB_to_XYZ_m[3][3] = { { 0.412424f, 357579f, 0.180464f},
- // { 0.212656f, 0.715158f, 0.0721856f},
- // { 0.0193324f, 0.119193f, 0.950444f} };
- static constexpr float XYZ_to_sRGB_m[3][3] = { {3.2406f, -1.5372f, -0.4986f},
- {-0.9689f, 1.8758f, 0.0415f},
- {0.0557f, -0.2040f, 1.0570f} };
- static float linear_to_non_linear(float data);
- static float* linear_to_non_linear(const float* data, unsigned int length);
- static float non_linear_to_linear(float data);
- static float* non_linear_to_linear(const float* data, unsigned int length);
- static std::tuple<float, float, float> sRGB_to_XYZ(float r, float g, float b);
- // Warning data contains pixel with RGB components.
- // length is the number of pixel, not the real length of the data array.
- // The length of the data array is length*3.
- static float* sRGB_to_XYZ(const float* data, const unsigned int length);
- static float sRGB_to_Y_of_XYZ(float r, float g, float b);
- // Warning data contains pixel with RGB components.
- // length is the number of pixel, not the real length of the data array.
- // The length of the data array is length*3.
- static float* sRGB_to_Y_of_XYZ(const float* data, const unsigned int length);
- static std::tuple<float, float, float> XYZ_to_Lab(float x, float y, float z);
- // Warning data contains pixel with RGB components.
- // length is the number of pixel, not the real length of the data array.
- // The length of the data array is length*3.
- static float* XYZ_to_Lab(const float* data, const unsigned int length);
-
- static std::tuple<float, float, float> sRGB_to_Lab(float r, float g, float b);
- // Warning data contains pixel with RGB components.
- // length is the number of pixel, not the real length of the data array.
- // The length of the data array is length*3.
- static float* sRGB_to_Lab(const float* data, const unsigned int length);
- static float sRGB_to_L_of_Lab(float r, float g, float b);
- static std::tuple<float, float, float> Lab_to_LCH(float L, float a, float b);
- // Warning data contains pixel with Lab components.
- // length is the number of pixel, not the real length of the data array.
- // The length of the data array is length*3.
- static float* Lab_to_LCH(const float* data, const unsigned int length);
- static float Lab_to_C_of_LCH(float a, float b);
- static float Lab_to_H_of_LCH(float a, float b);
- static std::tuple<float, float, float> LCH_to_Lab(float L, float C, float H);
- // Warning data contains pixel with LCH components.
- // length is the number of pixel, not the real length of the data array.
- // The length of the data array is length*3.
- static float* LCH_to_Lab(const float* data, const unsigned int length);
- static std::tuple<float, float, float> Lab_to_XYZ(float L, float a, float b);
- // Warning data contains pixel with Lab components.
- // length is the number of pixel, not the real length of the data array.
- // The length of the data array is length*3.
- static float* Lab_to_XYZ(const float* data, const unsigned int length);
-
- static std::tuple<float, float, float> XYZ_to_sRGB(float x, float y, float z);
- // Warning data contains pixel with XYZ components.
- // length is the number of pixel, not the real length of the data array.
- // The length of the data array is length*3.
- static float* XYZ_to_sRGB(const float* data, const unsigned int length);
-
- // Warning data contains pixel with LCH components.
- // length is the number of pixel, not the real length of the data array.
- // The length of the data array is length*3.
- static float* LCH_to_sRGB(const float* data, const unsigned int length);
- };
- #endif
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