yuva.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 PAPYRUSYUVA_H
00020 #define PAPYRUSYUVA_H
00021 
00022 namespace Papyrus {
00023 
00024 class RGBA;
00025 
00030 struct YUVA {
00031   YUVA(double yuv_y=0.0, double yuv_u=0.0, double yuv_v=0.0, double yuv_a=1.0);
00032 
00033   YUVA(const RGBA& rgb);
00034 
00035   double y, u, v, alpha;
00036 
00037   double operator[](unsigned index);
00038 
00039   YUVA& operator=(const RGBA& rgb);
00040 
00041   operator RGBA();
00042 
00043 
00044   };
00045 
00046   void rgb_to_yuv(double rgb_r, double rgb_g, double rgb_b,
00047                   double& yuv_y, double& yuv_u, double& yuv_v);
00048 
00049   void yuv_to_rgb(double yuv_y, double yuv_u, double yuv_v,
00050                   double& rgb_r, double& rgb_g, double& rgb_b);
00051 
00052 
00053 }
00054 
00055 #endif

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