/**
 * \file canvas_imp_rgb.h
 *
 * \brief eine Canvas Implementation für ein rgb Canvas.
 *
 * \author Georg Steffers <georg@steffers.org> [gs]
 *
 * \date 04.12.2003
 *
 * \version ..2002 [gs]: erste funktionierende Implementation
 * \version 22.12.2003 [gs]: <ul><li>
 *                           beginn der Dokumentation via doxygen
 *                           </li><li>
 *                           Light und Fogtables hinzugef&uuml;gt
 *                           eine Methode f&uuml;r perPixel Shading
 *                           eingebaut, (soll heissen ein gesetztes
 *                           Pixel kann nachtr&aum;glich noch
 *                           geshaded werden.
 *                           </li></ul>
 */

/* 
 * Copyright (C)2003 Georg Steffers
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 * 
 * This program 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef __canvas_imp_rgb_h__
#define __canvas_imp_rgb_h__

#include "canvas_imp.h"

class canvas_imp_rgb : public canvas_imp {
    private:
        enum rgb_e_t { red=0, green, blue };

        unsigned* light_table[3];
        unsigned* fog_table[3];

        char bytes_per_rgb;

        unsigned long col_mask[3];
        unsigned col_shift[3];
        unsigned col_max[3];

        void compute_color_resolution(void);
        void compute_light_table(void);
        void compute_fog_table(void);

    public:
        canvas_imp_rgb(unsigned long, unsigned long, unsigned long,
                       char, char);
        virtual ~canvas_imp_rgb() {}

        unsigned long ext_to_native(unsigned, unsigned, unsigned);

        void light_native(unsigned long* col, unsigned intense);

        // und wieder fehlt alles für light und fog.
};

#endif // __canvas_imp_rgb_h__