1 files changed, 88 insertions, 0 deletions
diff --git a/src/include/color.h b/src/include/color.h
new file mode 100644
index 0000000..e3f945b
--- /dev/null
+++ b/src/include/color.h
@@ -0,0 +1,88 @@
+// -*- C++ -*-
+/* <groff_src_dir>/src/include/color.h
+Copyright (C) 2001-2020 Free Software Foundation, Inc.
+    Written by Gaius Mulley <gaius@glam.ac.uk>
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#include <stddef.h>
+#include "symbol.h"
+
+enum color_scheme {DEFAULT, CMY, CMYK, RGB, GRAY};
+
+class color {
+private:
+  color_scheme scheme;
+  unsigned int components[4];
+  color *next;
+
+  int read_encoding(const color_scheme, const char * const,
+		    const size_t);
+
+public:
+  symbol nm;
+  enum {MAX_COLOR_VAL = 0xffff};
+  color(symbol s = default_symbol) : scheme(DEFAULT), nm(s) {}
+  color(const color * const);
+  ~color();
+
+  int operator==(const color & c) const;
+  int operator!=(const color & c) const;
+
+  int is_default() { return scheme == DEFAULT; }
+
+  // set color from given color component values
+  void set_default();
+  void set_rgb(const unsigned int r, const unsigned int g,
+	       const unsigned int b);
+  void set_cmy(const unsigned int c, const unsigned int m,
+	       const unsigned int y);
+  void set_cmyk(const unsigned int c, const unsigned int m,
+		const unsigned int y, const unsigned int k);
+  void set_gray(const unsigned int g);
+	  
+  // set color from a color string
+  int read_rgb(const char * const s);
+  int read_cmy(const char * const s);
+  int read_cmyk(const char * const s);
+  int read_gray(const char * const s);
+
+  // Return the actual color scheme and retrieve the color components
+  // into a predefined vector (of length at least 4).
+  color_scheme get_components(unsigned int *c) const;
+
+  // retrieve the components of a color
+  void get_rgb(unsigned int *r, unsigned int *g, unsigned int *b) const;
+  void get_cmy(unsigned int *c, unsigned int *m, unsigned int *y) const;
+  void get_cmyk(unsigned int *c, unsigned int *m,
+		unsigned int *y, unsigned int *k) const;
+  void get_gray(unsigned int *g) const;
+
+  char *print_color();
+};
+
+#define Cyan components[0]
+#define Magenta components[1]
+#define Yellow components[2]
+#define Black components[3]
+
+#define Red components[0]
+#define Green components[1]
+#define Blue components[2]
+
+#define Gray components[0]
+
+extern color default_color;