dither.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef NUVIE_SCREEN_DITHER_H
#define NUVIE_SCREEN_DITHER_H

namespace Ultima {
namespace Nuvie {

class Configuration;

#define DITHER_NO_TRANSPARENCY false

// Dither modes..

enum DitherMode {
    DITHER_NONE = 0,
    DITHER_CGA = 1,
    DITHER_EGA = 2,
    DITHER_HRC = 3 //FIXME add this mode.
};

class Dither {
    const Configuration *config;
    uint8 *dither;
    DitherMode mode;

public:

    Dither(const Configuration *cfg);
    ~Dither();
    uint8 get_mode() const {
        return mode;
    }
    bool dither_bitmap(unsigned char *src_buf, uint16 src_w, uint16 src_h, bool has_transparency);

protected:

    bool load_data();
    void set_mode();

};

} // End of namespace Nuvie
} // End of namespace Ultima

#endif