tot.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 TOT_H
#define TOT_H

#include "common/error.h"
#include "common/events.h"
#include "common/fs.h"
#include "common/hash-str.h"
#include "common/memstream.h"
#include "common/random.h"
#include "common/scummsys.h"
#include "common/serializer.h"
#include "common/system.h"
#include "common/util.h"
#include "engines/engine.h"
#include "engines/savestate.h"
#include "graphics/screen.h"

#include "tot/chrono.h"
#include "tot/detection.h"
#include "tot/events.h"
#include "tot/graphics.h"
#include "tot/mouse.h"
#include "tot/sound.h"
#include "tot/types.h"

namespace Tot {

struct TotGameDescription;

enum TotAction {
    kActionEscape,
    kActionVolume,
    kActionSaveLoad,
    kActionTalk,
    kActionPickup,
    kActionLookAt,
    kActionUse,
    kActionOpen,
    kActionClose,
    kActionYes,
    kActionNo
};

class TotEngine : public Engine {

private:
    Common::RandomSource _randomSource;

    void handleEvent(Common::Event e);
    Common::Error syncGame(Common::Serializer &s);

    int engineStart();
    int startGame();
    void newGame();
    void resumeGame();

    void changeRoom();
    void loadScrollData(uint roomCode, bool rightScroll, uint horizontalPos, int scrollCorrection);
    void drawText(uint number);
    void displayLoading();
    void runaroundRed();
    void sprites(bool drawCharacter);
    SavedGame *saveGameToRegister();
    void originalSaveLoadScreen();
    void loadGame(SavedGame *game);
    bool autosaveExists();

    RoomFileRegister *readScreenDataFile(Common::SeekableReadStream *screenDataFile);
    void lookAtObject(byte objectNumber);
    void useInventoryObjectWithInventoryObject(int16 obj1, int16 obj2);
    void pickupScreenObject();
    void useScreenObject();
    void openScreenObject();
    void closeScreenObject();
    void action();
    void handleAction(byte invPos);
    void loadInventory();
    void obtainName(Common::String &playerName);
    void calculateRoute(byte zone1, byte zone2, bool extraCorrection = false, bool zonavedada = false);
    void wcScene();
    void advanceAnimations(bool barredZone, bool animateMouse);
    void updateSecondaryAnimationDepth();
    void updateMainCharacterDepth();
    void actionLineText(const Common::String &actionLine);
    void initializeObjectFile();
    void saveObjectsData(ScreenObject *object, Common::SeekableWriteStream *out);
    void scrollLeft(uint horizontalPos);
    void scrollRight(uint horizontalPos);
    TextEntry readTextRegister(uint numRegister);

    void readConversationFile();

    void adjustKey();
    void adjustKey2();
    void animateBat();
    void updateVideo();
    void nicheAnimation(byte nicheDir, int32 bitmap);
    void replaceBackpack(byte obj1, uint obj2);
    void dropObjectInScreen(ScreenObject *replacementObject);
    void calculateTrajectory(uint finalX, uint finalY);
    void animatedSequence(uint numSequence);
    void initScreenPointers();

    void loadAnimation(const Common::String &animation);
    void loadCharAnimation();
    void animateGive(uint dir, uint height);
    void animatePickup1(uint dir, uint height);
    void animatePickup2(uint dir, uint height);
    void animateOpen2(uint dir, uint height);

    void loadTV();
    void loadScreen();
    void loadScreenLayerWithDepth(uint coordx, uint coordy, uint bitmapSize, int32 bitmapIndex, uint depth);
    void loadScreenLayer(uint coordx, uint coordy, uint picSize, int32 pic, uint prof);
    void readBitmap(int32 bitmapOffset, byte *bitmap, uint bitmapSize, uint errorCode);
    void updateAltScreen(byte altScreenNumber);

    void freeInventory();
    void updateInventory(byte index);
    void updateObject(uint filePos);
    void readObject(Common::SeekableReadStream *stream, uint objPos, ScreenObject *thisRegObj);
    void saveObject(ScreenObject *object, Common::SeekableWriteStream *stream);
    void saveItemRegister();

    void saveTemporaryGame();
    void drawLookAtItem(RoomObjectListEntry obj);
    void putIcon(uint posX, uint posY, uint iconNumber);
    void drawInventory(byte direction, byte limit);
    void generateDiploma(Common::String &photoName);
    void credits();
    void checkMouseGrid();
    void introduction();
    void firstIntroduction();
    void readAlphaGraph(Common::String &data, int length, int x, int y, byte barColor);
    void readAlphaGraphSmall(Common::String &data, int length, int x, int y, byte barColor, byte textColor, Common::Event startEvent);
    void displayObjectDescription(const Common::String &text);
    void copyProtection();
    void initialLogo();
    void mainMenu(bool fade);
    void exitToDOS();
    void soundControls();
    void sacrificeScene();
    void ending();
    void loadBat();
    void loadDevil();
    void assembleCompleteBackground(byte *image, uint coordx, uint coordy);
    void assembleScreen(bool scroll = false);
    void disableSecondAnimation();
    void clearGame();

    // vars
    void initVars();
    void resetGameState();
    void clearVars();

    void processEvents(bool &escapePressed);
    void oldProcessEvents(bool &escapePressed);
protected:
    // Engine APIs
    Common::Error run() override;
    void syncSoundSettings() override;

public:
    Graphics::Screen *_screen = nullptr;
    GraphicsManager *_graphics = nullptr;
    SoundManager *_sound = nullptr;
    MouseManager *_mouse = nullptr;
    ChronoManager *_chrono = nullptr;
    Tot::TotEventManager *_events = nullptr;
    const ADGameDescription *_gameDescription;

    bool _showMouseGrid = false;
    bool _showScreenGrid = false;
    bool _showGameGrid = false;
    bool _drawObjectAreas = false;

    Common::Language _lang = Common::ES_ESP;

    Common::MemorySeekableReadWriteStream *_conversationData = nullptr;
    Common::MemorySeekableReadWriteStream *_rooms = nullptr;
    Common::MemorySeekableReadWriteStream *_sceneObjectsData = nullptr;

    bool _roomChange = false;
    bool _isTVOn = false;
    bool _isVasePlaced = false;
    bool _isScytheTaken = false;
    bool _isTridentTaken = false;
    bool _isPottersWheelDelivered = false;
    bool _isMudDelivered = false;
    bool _isGreenDevilDelivered = false;
    bool _isRedDevilCaptured = false;
    bool _isPottersManualDelivered = false;
    bool _isCupboardOpen = false;
    bool _isChestOpen = false;
    bool _isTrapSet = false;
    bool _isPeterCoughing = false;

    bool _isSealRemoved = false;
    bool _inGame = false;
    bool _firstTimeDone = false; // Flag for first time run of the game.
    bool _isIntroSeen = false;
    bool _shouldQuitGame = false;
    bool _startNewGame = false; // Flag to initialize game
    bool _continueGame = false; // Flag to resume game
    bool _isSavingDisabled = false;
    bool _isDrawingEnabled = false; // true if sprites should be drawn
    bool _isSecondaryAnimationEnabled = false; // Whether room has secondary animation

    InventoryEntry _inventory[kInventoryIconCount]; // These are the icons currnetly in the inventory
    byte *_inventoryIconBitmaps[kInventoryIconCount] = { nullptr };
    byte _inventoryPosition = 0;
    CharacterAnim _mainCharAnimation;
    uint _mainCharFrameSize = 0;
    SecondaryAnim _secondaryAnimation;
    uint _secondaryAnimFrameSize = 0;
    byte _actionCode = 0;
    byte _oldActionCode = 0;
    byte _trajectorySteps = 0;
    byte _doorIndex = 0;
    byte _gamePart = 1;
    byte _secondaryAnimationFrameCount = 0;
    byte _secondaryAnimDirCount = 0;
    byte _cpCounter = 0, _cpCounter2 = 0;
    byte _destinationX = 0, _destinationY = 0;
    byte _charFacingDirection = 0;

    uint _secondaryAnimWidth = 0, _secondaryAnimHeight = 0;
    uint _backpackObjectCode = 0;
    uint _oldposx = 0, _oldposy = 0;

    int _element1 = 0, _element2 = 0;
    uint16 _characterPosX = 0, _characterPosY = 0;
    int _xframe2 = 0, _yframe2 = 0;

    Common::File _verbFile;
    Common::String _oldInventoryObjectName, _inventoryObjectName;

    Common::String _characterName = "";

    Common::String _decryptionKey;

    uint _niche[2][4];

    RoomFileRegister *_currentRoomData = nullptr;

    ScreenObject *_curObject = nullptr; // Currently selected object in the screen
    Route _mainRoute;

    Common::Point _trajectory[300];

    uint _trajectoryLength = 0;
    uint _currentTrajectoryIndex = 0;
    uint _currentSecondaryTrajectoryIndex = 0;
    byte _currentZone = 0, _targetZone = 0, _oldTargetZone = 0;

    byte _maxXGrid = 0, _maxYGrid = 0;

    byte _movementGridForSecondaryAnim[10][10];
    byte _mouseGridForSecondaryAnim[10][10];
    byte _maskGridSecondaryAnim[10][10];
    byte _maskMouseSecondaryAnim[10][10];

    bool _list1Complete = false,
        _list2Complete = false,
        _obtainedList1 = false, // whether we've been given list 1
        _obtainedList2 = false; // whether we've been given list 2

    bool _firstTimeTopicA[kCharacterCount] = { false },
        _firstTimeTopicB[kCharacterCount] = { false },
        _firstTimeTopicC[kCharacterCount] = { false },
        _bookTopic[kCharacterCount] = { false },
        _mintTopic[kCharacterCount] = { false };

    bool _caves[5] = { false };

    uint16 _firstList[5] = { 0 }, _secondList[5] = { 0 };

    int32 _screenSize = 65520;

    byte _iframe = 0, _iframe2 = 0;

    ObjectInfo _depthMap[kNumScreenOverlays];
    byte *_screenLayers[kNumScreenOverlays] =  { nullptr };
    byte *_curCharacterAnimationFrame = nullptr;
    byte *_curSecondaryAnimationFrame = nullptr;

    byte *_sceneBackground = nullptr;

    byte *_characterDirtyRect = nullptr;
    byte *_backgroundCopy = nullptr;

    uint _currentRoomNumber = 0;

    bool _isLoadingFromLauncher = false;

    bool _saveAllowed = false;

    uint _oldGridX = 0, _oldGridY = 0;

    uint _curDepth = 0;
    uint16 _dirtyMainSpriteX = 0, _dirtyMainSpriteY = 0;
    uint _dirtyMainSpriteX2 = 0, _dirtyMainSpriteY2 = 0;
    byte *_spriteBackground = nullptr;
public:
    TotEngine(OSystem *syst, const ADGameDescription *gameDesc);
    ~TotEngine() override;

    uint32 getFeatures() const;

    Common::String getGameId() const;

    uint32 getRandomNumber(uint maxNum) {
        return _randomSource.getRandomNumber(maxNum);
    }

    bool hasFeature(EngineFeature f) const override {
        return (f == kSupportsLoadingDuringRuntime) ||
               (f == kSupportsSavingDuringRuntime) ||
               (f == kSupportsReturnToLauncher);
    };

    void drawFontSurface(Graphics::BgiFont &litt);

    // Save/Load
    Common::Error saveGameStream(Common::WriteStream *stream, bool isAutosave = false) override;
    Common::Error loadGameStream(Common::SeekableReadStream *stream) override;
    bool canLoadGameStateCurrently(Common::U32String *msg = nullptr) override;
    bool canSaveGameStateCurrently(Common::U32String *msg = nullptr) override;

    void loadScreenData(uint screenNumber);
    void clearScreenLayers();
    void clearAnimation();
    void buttonBorder(uint x1, uint y1, uint x2, uint y2, byte color1, byte color2, byte color3, byte color4, byte color5);
    void drawMenu(byte menuNumber);
    void drawLeftArrow(uint x, uint y);
    void drawRightArrow(uint x, uint y);
    void readTextFile();
    void loadAnimationForDirection(Common::SeekableReadStream *stream, int direction);
    void sayLine(uint textRef, byte textColor, byte shadowColor, uint &responseNumber, bool isWithinConversation);
    void goToObject(byte zone1, byte zone2);
    void readObject(uint objPos);
    TextEntry readTextRegister();
    void drawInventory();
    void drawInventoryMask();
    void setRoomTrajectories(int height, int width, TRAJECTORIES_OP op, bool fixGrids = true);
    void saveRoomData(RoomFileRegister *room, Common::SeekableWriteStream *stream);
    //vars
    void initializeScreenFile();
};

extern TotEngine *g_engine;
#define SHOULD_QUIT ::Tot::g_engine->shouldQuit()

} // End of namespace Tot

#endif // TOT_H