Line data    Source code

       1             : /* Copyright (C) 2001-2016 Free Software Foundation, Inc.
       2             :      Written by Gaius Mulley <gaius@glam.ac.uk>
       3             : 
       4             : This file is part of groff, the GNU roff typesetting system.
       5             : 
       6             : groff is free software; you can redistribute it and/or modify it under
       7             : the terms of the GNU General Public License as published by the Free
       8             : Software Foundation, either version 3 of the License, or
       9             : (at your option) any later version.
      10             : 
      11             : groff is distributed in the hope that it will be useful, but WITHOUT ANY
      12             : WARRANTY; without even the implied warranty of MERCHANTABILITY or
      13             : FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      14             : for more details.
      15             : 
      16             : You should have received a copy of the GNU General Public License
      17             : along with this program.  If not, see <http://www.gnu.org/licenses/>. */
      18             : 
      19             : #include "symbol.h"
      20             : 
      21             : enum color_scheme {DEFAULT, CMY, CMYK, RGB, GRAY};
      22             : 
      23             : class color {
      24             : private:
      25             :   color_scheme scheme;
      26             :   unsigned int components[4];
      27             :   color *next;
      28             : 
      29             :   int read_encoding(const color_scheme, const char * const,
      30             :                     const size_t);
      31             : 
      32             : public:
      33             :   symbol nm;
      34             :   enum {MAX_COLOR_VAL = 0xffff};
      35      183342 :   color(symbol s = default_symbol) : scheme(DEFAULT), nm(s) {}
      36             :   color(const color * const);
      37             :   ~color();
      38             : 
      39             :   int operator==(const color & c) const;
      40             :   int operator!=(const color & c) const;
      41             : 
      42     2186353 :   int is_default() { return scheme == DEFAULT; }
      43             : 
      44             :   // set color from given color component values
      45             :   void set_default();
      46             :   void set_rgb(const unsigned int r, const unsigned int g,
      47             :                const unsigned int b);
      48             :   void set_cmy(const unsigned int c, const unsigned int m,
      49             :                const unsigned int y);
      50             :   void set_cmyk(const unsigned int c, const unsigned int m,
      51             :                 const unsigned int y, const unsigned int k);
      52             :   void set_gray(const unsigned int g);
      53             : 
      54             :   // set color from a color string
      55             :   int read_rgb(const char * const s);
      56             :   int read_cmy(const char * const s);
      57             :   int read_cmyk(const char * const s);
      58             :   int read_gray(const char * const s);
      59             : 
      60             :   // Return the actual color scheme and retrieve the color components
      61             :   // into a predefined vector (of length at least 4).
      62             :   color_scheme get_components(unsigned int *c) const;
      63             : 
      64             :   // retrieve the components of a color
      65             :   void get_rgb(unsigned int *r, unsigned int *g, unsigned int *b) const;
      66             :   void get_cmy(unsigned int *c, unsigned int *m, unsigned int *y) const;
      67             :   void get_cmyk(unsigned int *c, unsigned int *m,
      68             :                 unsigned int *y, unsigned int *k) const;
      69             :   void get_gray(unsigned int *g) const;
      70             : 
      71             :   char *print_color();
      72             : };
      73             : 
      74             : #define Cyan components[0]
      75             : #define Magenta components[1]
      76             : #define Yellow components[2]
      77             : #define Black components[3]
      78             : 
      79             : #define Red components[0]
      80             : #define Green components[1]
      81             : #define Blue components[2]
      82             : 
      83             : #define Gray components[0]
      84             : 
      85             : extern color default_color;
      86             : 
      87             : // Local Variables:
      88             : // fill-column: 72
      89             : // mode: C++
      90             : // End:
      91             : // vim: set cindent noexpandtab shiftwidth=2 textwidth=72: