color.h revision 104862 
1// -*- C++ -*-
2
3/* <groff_src_dir>/src/include/color.h
4
5Last update: 10 Apr 2002
6
7Copyright (C) 2001, 2002 Free Software Foundation, Inc.
8    Written by Gaius Mulley <gaius@glam.ac.uk>
9
10This file is part of groff.
11
12groff is free software; you can redistribute it and/or modify it under
13the terms of the GNU General Public License as published by the Free
14Software Foundation; either version 2, or (at your option) any later
15version.
16
17groff is distributed in the hope that it will be useful, but WITHOUT ANY
18WARRANTY; without even the implied warranty of MERCHANTABILITY or
19FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
20for more details.
21
22You should have received a copy of the GNU General Public License along
23with groff; see the file COPYING.  If not, write to the Free Software
24Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25
26#include <stddef.h>
27
28enum color_scheme {DEFAULT, CMY, CMYK, RGB, GRAY};
29
30class color {
31private:
32  color_scheme scheme;
33  unsigned int components[4];
34
35  int read_encoding(const color_scheme, const char * const,
36		    const size_t);
37
38public:
39  enum {MAX_COLOR_VAL = 0xffff};
40  color() : scheme(DEFAULT){}
41  color(const color * const);
42
43  int operator==(const color & c) const;
44  int operator!=(const color & c) const;
45
46  int is_default() { return scheme == DEFAULT; }
47
48  // set color from given color component values
49  void set_default();
50  void set_rgb(const unsigned int r, const unsigned int g,
51	       const unsigned int b);
52  void set_cmy(const unsigned int c, const unsigned int m,
53	       const unsigned int y);
54  void set_cmyk(const unsigned int c, const unsigned int m,
55		const unsigned int y, const unsigned int k);
56  void set_gray(const unsigned int g);
57
58  // set color from a color string
59  int read_rgb(const char * const s);
60  int read_cmy(const char * const s);
61  int read_cmyk(const char * const s);
62  int read_gray(const char * const s);
63
64  // Return the actual color scheme and retrieve the color components
65  // into a predefined vector (of length at least 4).
66  color_scheme get_components(unsigned int *c) const;
67
68  // retrieve the components of a color
69  void get_rgb(unsigned int *r, unsigned int *g, unsigned int *b) const;
70  void get_cmy(unsigned int *c, unsigned int *m, unsigned int *y) const;
71  void get_cmyk(unsigned int *c, unsigned int *m,
72		unsigned int *y, unsigned int *k) const;
73  void get_gray(unsigned int *g) const;
74};
75
76#define Cyan components[0]
77#define Magenta components[1]
78#define Yellow components[2]
79#define Black components[3]
80
81#define Red components[0]
82#define Green components[1]
83#define Blue components[2]
84
85#define Gray components[0]
86
87extern color default_color;
88