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/**
* Copyright © 2016 Mattias Andrée <maandree@kth.se>
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef LIBCOLOUR_H
#define LIBCOLOUR_H
union libcolour_colour;
typedef enum libcolour_model {
LIBCOLOUR_RGB,
LIBCOLOUR_SRGB,
LIBCOLOUR_CIEXYY,
LIBCOLOUR_CIEXYZ,
LIBCOLOUR_CIELAB,
LIBCOLOUR_CIELUV,
LIBCOLOUR_CIELCH,
LIBCOLOUR_YIQ,
LIBCOLOUR_YDBDR,
LIBCOLOUR_YUV,
LIBCOLOUR_YPBPR,
LIBCOLOUR_YCGCO,
LIBCOLOUR_CIE1960UCS,
LIBCOLOUR_CIEUVW
} libcolour_model_t;
typedef enum libcolour_rgb_colour_space {
} libcolour_rgb_colour_space_t;
typedef struct libcolour_rgb {
enum libcolour_model model;
double R;
double G;
double B;
int with_gamma;
int regular_gamma;
double gamma;
union libcolour_colour red;
union libcolour_colour green;
union libcolour_colour blue;
union libcolour_colour white;
double (*to_encoded_red)(double);
double (*to_decoded_red)(double);
double (*to_encoded_green)(double);
double (*to_decoded_green)(double);
double (*to_encoded_blue)(double);
double (*to_decoded_blue)(double);
double M[3][3];
double Minv[3][3];
enum libcolour_rgb_colour_space colour_space;
} libcolour_srgb_t;
typedef struct libcolour_srgb {
enum libcolour_model model;
double R;
double G;
double B;
int with_gamma;
} libcolour_srgb_t;
typedef struct libcolour_ciexyy {
enum libcolour_model model;
double x;
double y;
double Y;
} libcolour_ciexyy_t;
typedef struct libcolour_ciexyz {
enum libcolour_model model;
double X;
double Y;
double Z;
} libcolour_ciexyz_t;
typedef struct libcolour_cielab {
enum libcolour_model model;
double L;
double a;
double n;
} libcolour_cielab_t;
typedef struct libcolour_cieluv {
enum libcolour_model model;
double L;
double u;
double v;
union libcolour_colour white;
} libcolour_cieluv_t;
typedef struct libcolour_cielch {
enum libcolour_model model;
double L;
double C;
double h;
union libcolour_colour white;
} libcolour_cielch_t;
typedef struct libcolour_yiq {
enum libcolour_model model;
double Y;
double I;
double Q;
} libcolour_yiq_t;
typedef struct libcolour_ydbdr {
enum libcolour_model model;
double Y;
double Db;
double Dr;
} libcolour_ydbdr_t;
typedef struct libcolour_yuv {
enum libcolour_model model;
double Y;
double U;
double V;
} libcolour_yuv_t;
typedef struct libcolour_ypbpr {
enum libcolour_model model;
double Y;
double Pb;
double Pr;
} libcolour_ypbpr_t;
typedef struct libcolour_ycgco {
enum libcolour_model model;
double Y;
double Cg;
double Co;
} libcolour_ycgco_t;
typedef struct libcolour_cie1960ucs {
enum libcolour_model model;
double u;
double v;
double Y;
} libcolour_cie1960ucs_t;
typedef struct libcolour_cieuvw {
enum libcolour_model model;
double U;
double V;
double W;
double u0;
double v0;
} libcolour_cieuvw_t;
typedef union libcolour_colour {
enum libcolour_model model;
struct libcolour_rgb rgb;
struct libcolour_srgb srgb;
struct libcolour_ciexyy ciexyy;
struct libcolour_ciexyz ciexyz;
struct libcolour_cielab cielab;
struct libcolour_cieluv cieluv;
struct libcolour_cielch cielch;
struct libcolour_yiq yiq;
struct libcolour_ydbdr ydbdr;
struct libcolour_yuv yuv;
struct libcolour_ypbpr ypbpr;
struct libcolour_ycgco ycgco;
struct libcolour_cie1960ucs cie1960ucs;
struct libcolour_cieuvw cieuvw;
} libcolour_colour_t;
int libcolour_convert(const libcolour_colour_t* restrict from, libcolour_colour_t* restrict to);
double libcolour_srgb_encode(double);
double libcolour_srgb_decode(double);
int libcolour_delta_e(const libcolour_colour_t*, const libcolour_colour_t*, double*);
int libcolour_proper(libcolour_colour_t*);
#endif
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