include/color.h

   1 /*@
   2  * Copyright (c) 2014 - 2017 Steffen (Daode) Nurpmeso <steffen@sdaoden.eu>.
   3  *
   4  * Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
   5  *     Written by Gaius Mulley <gaius@glam.ac.uk>
   6  *
   7  * This is free software; you can redistribute it and/or modify it under
   8  * the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2, or (at your option) any later
  10  * version.
  11  *
  12  * This is distributed in the hope that it will be useful, but WITHOUT ANY
  13  * WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15  * for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with groff; see the file COPYING.  If not, write to the Free Software
  19  * Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA.
  20  */
  21 #ifndef _COLOR_H
  22 #define _COLOR_H
  23
  24 #include "config.h"
  25
  26 #include <stddef.h>
  27
  28 #include "symbol.h"
  29
  30 enum color_scheme {DEFAULT, CMY, CMYK, RGB, GRAY};
  31
  32 class color
  33 {
  34   color_scheme scheme;
  35   unsigned int components[4];
  36   color *next;
  37   static color *free_list;
  38
  39   int read_encoding(const color_scheme, const char * const,
  40                     const size_t);
  41
  42 public:
  43   symbol nm;
  44   enum {MAX_COLOR_VAL = 0xffff};
  45   color(symbol s = default_symbol) : scheme(DEFAULT), nm(s) {}
  46   color(const color * const);
  47   ~color();
  48   void *operator new(size_t);
  49   void operator delete(void *);
  50
  51   int operator==(const color & c) const;
  52   int operator!=(const color & c) const;
  53
  54   int is_default() { return scheme == DEFAULT; }
  55
  56   // set color from given color component values
  57   void set_default();
  58   void set_rgb(const unsigned int r, const unsigned int g,
  59                const unsigned int b);
  60   void set_cmy(const unsigned int c, const unsigned int m,
  61                const unsigned int y);
  62   void set_cmyk(const unsigned int c, const unsigned int m,
  63                 const unsigned int y, const unsigned int k);
  64   void set_gray(const unsigned int g);
  65
  66   // set color from a color string
  67   int read_rgb(const char * const s);
  68   int read_cmy(const char * const s);
  69   int read_cmyk(const char * const s);
  70   int read_gray(const char * const s);
  71
  72   // Return the actual color scheme and retrieve the color components
  73   // into a predefined vector (of length at least 4).
  74   color_scheme get_components(unsigned int *c) const;
  75
  76   // retrieve the components of a color
  77   void get_rgb(unsigned int *r, unsigned int *g, unsigned int *b) const;
  78   void get_cmy(unsigned int *c, unsigned int *m, unsigned int *y) const;
  79   void get_cmyk(unsigned int *c, unsigned int *m,
  80                 unsigned int *y, unsigned int *k) const;
  81   void get_gray(unsigned int *g) const;
  82
  83   char *print_color();
  84 };
  85
  86 #define Cyan components[0]
  87 #define Magenta components[1]
  88 #define Yellow components[2]
  89 #define Black components[3]
  90
  91 #define Red components[0]
  92 #define Green components[1]
  93 #define Blue components[2]
  94
  95 #define Gray components[0]
  96
  97 extern color default_color; /* FIXME class-global static? (access fun?!) */
  98
  99 #endif // _COLOR_H
 100 // s-it2-mode