mads.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 MADS_ENGINE_H
#define MADS_ENGINE_H

#include "audio/mixer.h"
#include "common/events.h"
#include "common/serializer.h"
#include "common/stack.h"
#include "common/random.h"
#include "common/util.h"
#include "engines/engine.h"
#include "mads/detection.h"
#include "graphics/screen.h"
#include "mads/core/sound_manager.h"
#include "mads/core/game.h"
#include "mads/core/speech.h"

namespace MADS {

#define DEBUG_BASIC 1
#define DEBUG_INTERMEDIATE 2
#define DEBUG_DETAILED 3

enum MADSDebugChannels {
    kDebugPath = 1,
    kDebugScripts,
    kDebugGraphics,
    kDebugConversations
};

enum MADSActions {
    kActionNone,
    kActionEscape,
    kActionGameMenu,
    kActionSave,
    kActionRestore,
    kActionScrollUp,
    kActionScrollDown,
    kActionStartGame,
    kActionResumeGame,
    kActionShowIntro,
    kActionCredits,
    kActionQuotes,
    kActionRestartAnimation
};

typedef void (*TimerFunction)();

class MADSEngine : public Engine {
private:
    uint16 _shakeRandom = 0x4D2;

    void initGlobals();
    void syncGame(Common::Serializer &s);
    bool isSpecialKey(Common::KeyCode key) const;
    void updateScreen();
    
protected:
    const MADSGameDescription *_gameDescription;
    Common::RandomSource _randomSource;
    Graphics::Screen *_screen = nullptr;
    Common::Stack<Common::KeyState> _keyEvents;
    uint32 _nextFrameTime = 0;
    Common::Point _mousePos;
    int _mouseButtons = 0;
    Audio::SoundHandle _speechHandle;
    TimerFunction _timerFunction = nullptr;
    uint32 _nextTimerTime = 0;

    bool hasFeature(EngineFeature f) const override;

    void pollEvents();
    void checkForTimerFunction();

public:
    MADS::SoundManager *_soundManager = nullptr;
    bool _musicFlag = true;
    bool _soundFlag = true;
    bool &_speechFlag = speech_on;

public:
    MADSEngine(OSystem *syst, const MADSGameDescription *gameDesc);
    ~MADSEngine() override;
    void initializePath(const Common::FSNode &gamePath) override;

    uint32 getFeatures() const;
    Common::Language getLanguage() const;
    Common::Platform getPlatform() const;
    uint16 getVersion() const;
    uint32 getGameID() const;
    uint32 getGameFeatures() const;
    bool isDemo() const;
    bool isCDROM() const;

    void readConfigFile();
    int getRandomNumber(int maxNumber);
    int getRandomNumber(int minNumber, int maxNumber);

    Graphics::Screen *getScreen() const {
        return _screen;
    }

    bool hasPendingKey();
    int getKey();
    void flushKeys();

    int getMouseState(int &x, int &y);

    uint32 getMillis();

    /* Callback routines in game-specific MAIN module */
    int main_cheating_key(int mykey) const {
        return mykey;
    }
    int main_normal_key(int mykey) const {
        return mykey;
    }
    virtual int main_copy_verify() {
        return COPY_SUCCEED;
    }

    bool canLoadGameStateCurrently(Common::U32String *msg) override;
    bool canSaveGameStateCurrently(Common::U32String *msg) override {
        return canLoadGameStateCurrently(msg);
    }
    Common::Error saveGameStream(Common::WriteStream *stream, bool isAutosave) override;
    Common::Error loadGameStream(Common::SeekableReadStream *stream) override;
    virtual void syncRoom(Common::Serializer &s) = 0;
    SaveStateList listSaves() const;

    virtual void global_init_code() = 0;
    virtual void section_music(int section_num) = 0;
    virtual void global_section_constructor() = 0;
    virtual void global_daemon_code() = 0;
    virtual void global_pre_parser_code() = 0;
    virtual void global_parser_code() = 0;
    virtual void global_error_code() = 0;
    virtual void global_room_init() = 0;
    virtual void global_sound_driver() = 0;
    virtual void global_game_main_loop() {}
    virtual void global_verb_filter() {}
    virtual void player_keep_walking();

    void playSpeech(Audio::AudioStream *stream);
    void stopSpeech();
    bool isSpeechPlaying() const;

    void setTimerFunction(TimerFunction fn) {
        _timerFunction = fn;
    }
};

extern MADSEngine *g_engine;

} // namespace MADS

#endif