hsba.h

00001 /***************************************************************************
00002 *   Copyright (C) 2006 by Rick L. Vinyard, Jr.                            *
00003 *   rvinyard@cs.nmsu.edu                                                  *
00004 *                                                                         *
00005 *   This program is free software; you can redistribute it and/or modify  *
00006 *   it under the terms of the GNU Lesser General Public License as        *
00007 *   published by the Free Software Foundation version 2.1.                *
00008 *                                                                         *
00009 *   This program is distributed in the hope that it will be useful,       *
00010 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
00011 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
00012 *   GNU General Public License for more details.                          *
00013 *                                                                         *
00014 *   You should have received a copy of the GNU Lesser General Public      *
00015 *   License along with this library; if not, write to the                 *
00016 *   Free Software Foundation, Inc.,                                       *
00017 *   51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA              *
00018 ***************************************************************************/
00019 #ifndef PAPYRUSHSBA_H
00020 #define PAPYRUSHSBA_H
00021 
00022 #include <cairomm/pattern.h>
00023 
00024 namespace Papyrus {
00025 
00026 class RGBA;
00027 
00032 struct HSBA {
00033   HSBA(double h=0.0, double s=0.0, double b=0.0, double a=1.0);
00034 
00035   HSBA(const RGBA& rgb);
00036 
00037   double hue, saturation, brightness, alpha;
00038 
00039   double operator[](unsigned index);
00040 
00041   HSBA& operator=(const RGBA& rgb);
00042 
00043   operator RGBA();
00044 
00045   operator Cairo::RefPtr<Cairo::Pattern>();
00046 
00047   };
00048 
00049   void rgb_to_hsb(double rgb_r, double rgb_g, double rgb_b,
00050                   double& hsb_h, double& hsb_s, double& hsb_b);
00051 
00052   void hsb_to_rgb(double hsb_h, double hsb_s, double hsb_b,
00053                   double& rgb_r, double& rgb_g, double& rgb_b);
00054 
00055 
00056 }
00057 
00058 #endif

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