grid.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 SKY_GRID_H
#define SKY_GRID_H


#include "common/scummsys.h"
#include "skydefs.h"

namespace Sky {

struct Compact;
class Disk;
class SkyCompact;

class Grid {
public:
    Grid(Disk *pDisk, SkyCompact *skyCompact);
    ~Grid();

    // grid.asm routines
    void loadGrids();
    void removeObjectFromWalk(Compact *cpt);
    void objectToWalk(Compact *cpt);

    // function.asm
    // note that this routine does the same as objectToWalk, it just doesn't get
    // its x, y, width parameters from cpt.
    void plotGrid(uint32 x, uint32 y, uint32 width, Compact *cpt);
    // same here, it's basically the same as removeObjectFromWalk
    void removeGrid(uint32 x, uint32 y, uint32 width, Compact *cpt);
    uint8 *giveGrid(uint32 pScreen);

private:
    void objectToWalk(uint8 gridIdx, uint32 bitNum, uint32 width);
    void removeObjectFromWalk(uint8 gridIdx, uint32 bitNum, uint32 width);
    bool getGridValues(Compact *cpt, uint8 *resGrid, uint32 *resBitNum, uint32 *resWidth);
    bool getGridValues(uint32 x, uint32 y, uint32 width, Compact *cpt, uint8 *resGrid, uint32 *resBitNum, uint32 *resWidth);

    static int8 _gridConvertTable[];
    uint8 *_gameGrids[TOT_NO_GRIDS];
    Disk *_skyDisk;
    SkyCompact *_skyCompact;
};

} // End of namespace Sky

#endif //SKYGRID_H