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      1 /*	$NetBSD: color.h,v 1.1.1.1 2016/01/13 18:41:48 christos Exp $	*/
      2 
      3 // -*- C++ -*-
      4 
      5 /* <groff_src_dir>/src/include/color.h
      6 
      7 Last update: 14 Feb 2003
      8 
      9 Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
     10     Written by Gaius Mulley <gaius (at) glam.ac.uk>
     11 
     12 This file is part of groff.
     13 
     14 groff is free software; you can redistribute it and/or modify it under
     15 the terms of the GNU General Public License as published by the Free
     16 Software Foundation; either version 2, or (at your option) any later
     17 version.
     18 
     19 groff is distributed in the hope that it will be useful, but WITHOUT ANY
     20 WARRANTY; without even the implied warranty of MERCHANTABILITY or
     21 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
     22 for more details.
     23 
     24 You should have received a copy of the GNU General Public License along
     25 with groff; see the file COPYING.  If not, write to the Free Software
     26 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
     27 
     28 #include <stddef.h>
     29 #include "symbol.h"
     30 
     31 enum color_scheme {DEFAULT, CMY, CMYK, RGB, GRAY};
     32 
     33 class color {
     34 private:
     35   color_scheme scheme;
     36   unsigned int components[4];
     37   color *next;
     38   static color *free_list;
     39 
     40   int read_encoding(const color_scheme, const char * const,
     41 		    const size_t);
     42 
     43 public:
     44   symbol nm;
     45   enum {MAX_COLOR_VAL = 0xffff};
     46   color(symbol s = default_symbol) : scheme(DEFAULT), nm(s) {}
     47   color(const color * const);
     48   ~color();
     49   void *operator new(size_t);
     50   void operator delete(void *);
     51 
     52   int operator==(const color & c) const;
     53   int operator!=(const color & c) const;
     54 
     55   int is_default() { return scheme == DEFAULT; }
     56 
     57   // set color from given color component values
     58   void set_default();
     59   void set_rgb(const unsigned int r, const unsigned int g,
     60 	       const unsigned int b);
     61   void set_cmy(const unsigned int c, const unsigned int m,
     62 	       const unsigned int y);
     63   void set_cmyk(const unsigned int c, const unsigned int m,
     64 		const unsigned int y, const unsigned int k);
     65   void set_gray(const unsigned int g);
     66 
     67   // set color from a color string
     68   int read_rgb(const char * const s);
     69   int read_cmy(const char * const s);
     70   int read_cmyk(const char * const s);
     71   int read_gray(const char * const s);
     72 
     73   // Return the actual color scheme and retrieve the color components
     74   // into a predefined vector (of length at least 4).
     75   color_scheme get_components(unsigned int *c) const;
     76 
     77   // retrieve the components of a color
     78   void get_rgb(unsigned int *r, unsigned int *g, unsigned int *b) const;
     79   void get_cmy(unsigned int *c, unsigned int *m, unsigned int *y) const;
     80   void get_cmyk(unsigned int *c, unsigned int *m,
     81 		unsigned int *y, unsigned int *k) const;
     82   void get_gray(unsigned int *g) const;
     83 
     84   char *print_color();
     85 };
     86 
     87 #define Cyan components[0]
     88 #define Magenta components[1]
     89 #define Yellow components[2]
     90 #define Black components[3]
     91 
     92 #define Red components[0]
     93 #define Green components[1]
     94 #define Blue components[2]
     95 
     96 #define Gray components[0]
     97 
     98 extern color default_color;
     99