gnu/dist/groff/src/include/color.h

   1 /*      $NetBSD$        */
   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@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;