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/*
Copyright (C) 2014-2015 Carl Hetherington <cth@carlh.net>
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/** @file src/colour_conversion.h
* @brief ColourConversion class.
*/
#ifndef DCP_COLOUR_CONVERSION_H
#define DCP_COLOUR_CONVERSION_H
#include "chromaticity.h"
#include <boost/shared_ptr.hpp>
#include <boost/numeric/ublas/matrix.hpp>
#include <boost/optional.hpp>
namespace dcp {
class TransferFunction;
enum YUVToRGB {
YUV_TO_RGB_REC601,
YUV_TO_RGB_REC709,
YUV_TO_RGB_COUNT
};
/** @class ColourConversion
* @brief A representation of all the parameters involved the colourspace conversion
* of a YUV image to XYZ (via RGB).
*/
class ColourConversion
{
public:
ColourConversion ()
{}
ColourConversion (
boost::shared_ptr<const TransferFunction> in,
YUVToRGB yuv_to_rgb,
Chromaticity red,
Chromaticity green,
Chromaticity blue,
Chromaticity white,
boost::optional<Chromaticity> adjusted_white,
boost::shared_ptr<const TransferFunction> out
);
boost::shared_ptr<const TransferFunction> in () const {
return _in;
}
YUVToRGB yuv_to_rgb () const {
return _yuv_to_rgb;
}
Chromaticity red () const {
return _red;
}
Chromaticity green () const {
return _green;
}
Chromaticity blue () const {
return _blue;
}
Chromaticity white () const {
return _white;
}
boost::optional<Chromaticity> adjusted_white () const {
return _adjusted_white;
}
boost::shared_ptr<const TransferFunction> out () const {
return _out;
}
void set_in (boost::shared_ptr<const TransferFunction> f) {
_in = f;
}
void set_yuv_to_rgb (YUVToRGB y) {
_yuv_to_rgb = y;
}
void set_red (Chromaticity red) {
_red = red;
}
void set_green (Chromaticity green) {
_green = green;
}
void set_blue (Chromaticity blue) {
_blue = blue;
}
void set_white (Chromaticity white) {
_white = white;
}
void set_adjusted_white (Chromaticity adjusted_white) {
_adjusted_white = adjusted_white;
}
void unset_adjusted_white () {
_adjusted_white = boost::optional<Chromaticity> ();
}
void set_out (boost::shared_ptr<const TransferFunction> f) {
_out = f;
}
bool about_equal (ColourConversion const & other, float epsilon) const;
boost::numeric::ublas::matrix<double> rgb_to_xyz () const;
boost::numeric::ublas::matrix<double> xyz_to_rgb () const;
boost::numeric::ublas::matrix<double> bradford () const;
static ColourConversion const & srgb_to_xyz ();
static ColourConversion const & rec601_to_xyz ();
static ColourConversion const & rec709_to_xyz ();
static ColourConversion const & p3_to_xyz ();
protected:
/** Input transfer function (probably a gamma function, or something similar) */
boost::shared_ptr<const TransferFunction> _in;
/** Conversion to use from YUV to RGB */
YUVToRGB _yuv_to_rgb;
Chromaticity _red;
Chromaticity _green;
Chromaticity _blue;
Chromaticity _white;
/** White point that we are adjusting to using a Bradford matrix */
boost::optional<Chromaticity> _adjusted_white;
/** Output transfer function (probably an inverse gamma function, or something similar) */
boost::shared_ptr<const TransferFunction> _out;
};
}
#endif
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