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// -*- C++ -*-
/* <groff_src_dir>/src/include/color.h
Copyright (C) 2001-2020 Free Software Foundation, Inc.
Written by Gaius Mulley <gaius@glam.ac.uk>
This file is part of groff.
groff 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.
groff 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/>. */
#include <stddef.h>
#include "symbol.h"
enum color_scheme {DEFAULT, CMY, CMYK, RGB, GRAY};
class color {
private:
color_scheme scheme;
unsigned int components[4];
color *next;
int read_encoding(const color_scheme, const char * const,
const size_t);
public:
symbol nm;
enum {MAX_COLOR_VAL = 0xffff};
color(symbol s = default_symbol) : scheme(DEFAULT), nm(s) {}
color(const color * const);
~color();
int operator==(const color & c) const;
int operator!=(const color & c) const;
int is_default() { return scheme == DEFAULT; }
// set color from given color component values
void set_default();
void set_rgb(const unsigned int r, const unsigned int g,
const unsigned int b);
void set_cmy(const unsigned int c, const unsigned int m,
const unsigned int y);
void set_cmyk(const unsigned int c, const unsigned int m,
const unsigned int y, const unsigned int k);
void set_gray(const unsigned int g);
// set color from a color string
int read_rgb(const char * const s);
int read_cmy(const char * const s);
int read_cmyk(const char * const s);
int read_gray(const char * const s);
// Return the actual color scheme and retrieve the color components
// into a predefined vector (of length at least 4).
color_scheme get_components(unsigned int *c) const;
// retrieve the components of a color
void get_rgb(unsigned int *r, unsigned int *g, unsigned int *b) const;
void get_cmy(unsigned int *c, unsigned int *m, unsigned int *y) const;
void get_cmyk(unsigned int *c, unsigned int *m,
unsigned int *y, unsigned int *k) const;
void get_gray(unsigned int *g) const;
char *print_color();
};
#define Cyan components[0]
#define Magenta components[1]
#define Yellow components[2]
#define Black components[3]
#define Red components[0]
#define Green components[1]
#define Blue components[2]
#define Gray components[0]
extern color default_color;
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