queen.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 QUEEN_QUEEN_H
#define QUEEN_QUEEN_H

#include "engines/engine.h"
#include "common/random.h"

namespace Common {
class SeekableReadStream;
}

namespace Queen {

struct GameStateHeader {
    uint32 version;
    uint32 flags;
    uint32 dataSize;
    char description[32];
};

class BamScene;
class BankManager;
class Command;
class Debugger;
class Display;
class Graphics;
class Grid;
class Input;
class Logic;
class Resource;
class Sound;
class Walk;

class QueenEngine : public Engine {
public:

    QueenEngine(OSystem *syst);
    ~QueenEngine() override;

    BamScene *bam() const { return _bam; }
    BankManager *bankMan() const { return _bankMan; }
    Command *command() const { return _command; }
    Debugger *debugger() const { return _debugger; }
    Display *display() const { return _display; }
    Graphics *graphics() const { return _graphics; }
    Grid *grid() const { return _grid; }
    Input *input() const { return _input; }
    Logic *logic() const { return _logic; }
    Resource *resource() const { return _resource; }
    Sound *sound() const { return _sound; }
    Walk *walk() const { return _walk; }

    Common::RandomSource randomizer;

    void registerDefaultSettings();
    void checkOptionSettings();
    void readOptionSettings();
    void writeOptionSettings();

    int talkSpeed() const { return _talkSpeed; }
    void talkSpeed(int speed) { _talkSpeed = speed; }
    bool subtitles() const { return _subtitles; }
    void subtitles(bool enable) { _subtitles = enable; }

    void update(bool checkPlayerInput = false);

    bool canLoadOrSave() const;
    bool canLoadGameStateCurrently(Common::U32String *msg = nullptr) override;
    bool canSaveGameStateCurrently(Common::U32String *msg = nullptr) override;
    Common::Error saveGameState(int slot, const Common::String &desc, bool isAutosave = false) override;
    Common::Error loadGameState(int slot) override;
    int getAutosaveSlot() const override { return 99; }
    Common::String getSaveStateName(int slot) const override;
    void makeGameStateName(int slot, char *buf) const;
    int getGameStateSlot(const char *filename) const;
    void findGameStateDescriptions(char descriptions[100][32]);
    Common::SeekableReadStream *readGameStateHeader(int slot, GameStateHeader *gsh);

    enum {
        SAVESTATE_CUR_VER  = 1,
        SAVESTATE_MAX_NUM  = 100,
        SAVESTATE_MAX_SIZE = 30000,

        SLOT_LISTPREFIX    = -2,
        SLOT_AUTOSAVE      = -1,
        SLOT_QUICKSAVE     = 0,

        MIN_TEXT_SPEED     = 4,
        MAX_TEXT_SPEED     = 100
    };

protected:

    // Engine APIs
    Common::Error run() override;
    bool hasFeature(EngineFeature f) const override;
    void syncSoundSettings() override;


    int _talkSpeed;
    bool _subtitles;
    uint32 _lastUpdateTime;
    bool _gameStarted;

    BamScene *_bam;
    BankManager *_bankMan;
    Command *_command;
    Debugger *_debugger;
    Display *_display;
    Graphics *_graphics;
    Grid *_grid;
    Input *_input;
    Logic *_logic;
    Resource *_resource;
    Sound *_sound;
    Walk *_walk;
};

} // End of namespace Queen

#endif