myst_state.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 MYST_SAVELOAD_H
#define MYST_SAVELOAD_H

#include "common/savefile.h"
#include "common/file.h"
#include "common/str.h"

#include "engines/savestate.h"

namespace Common {
class Serializer;
}

namespace Mohawk {

class MohawkEngine_Myst;

struct MystSaveMetadata {
    uint8 saveDay;
    uint8 saveMonth;
    uint16 saveYear;

    uint8 saveHour;
    uint8 saveMinute;

    uint32 totalPlayTime;

    bool autoSave;

    Common::String saveDescription;

    MystSaveMetadata();
    bool sync(Common::Serializer &s);
};

// Page being held
enum HeldPage {
    kNoPage              = 0,
    kBlueLibraryPage     = 1,
    kBlueSeleniticPage   = 2,
    kBlueMechanicalPage  = 3,
    kBlueStoneshipPage   = 4,
    kBlueChannelwoodPage = 5,
    kBlueFirePlacePage   = 6,
    kRedLibraryPage      = 7,
    kRedSeleniticPage    = 8,
    kRedMechanicalPage   = 9,
    kRedStoneshipPage    = 10,
    kRedChannelwoodPage  = 11,
    kRedFirePlacePage    = 12,
    kWhitePage           = 13
};

// Age the player is in
enum ActiveAge {
    kSelenitic     = 0,
    kStoneship     = 1,
    kMystLibrary   = 2,
    kMechanical    = 3,
    kChannelwood   = 4,
    kIntro         = 5,
    kDni           = 6,
    kMystStart     = 7,
    kCredits       = 8,
    kSirrusEnding  = 9,
    kAchenarEnding = 10
};

// Various states that Atrus can be in when in Dni
enum DniEnding {
    kDniNotVisited    = 0, // Player hasn't been to Dni/K'veer yet
    kAtrusWantsPage   = 1, // Player is in Dni with the white page
    kAtrusLeaves      = 2, // Atrus leaves Dni after receiving the white page
    kForgotPage       = 3, // Player has entered Dni without bringing the white page
    kBooksDestroyed   = 4  // Atrus returns to Dni after previously leaving
                           // and destroying the books of his sons
};

class MystGameState {
public:
    static const int kAutoSaveSlot;

    MystGameState(MohawkEngine_Myst*, Common::SaveFileManager*);
    ~MystGameState();

    static SaveStateDescriptor querySaveMetaInfos(const MetaEngine *metaEngine, int slot);
    static Common::String querySaveDescription(int slot);

    void reset();
    bool load(int slot);
    bool save(int slot, const Common::String &desc, const Graphics::Surface *thumbnail, bool autosave);
    static bool deleteSave(int slot);

    void addZipDest(MystStack stack, uint16 view);
    bool isReachableZipDest(MystStack stack, uint16 view);

    /* 8 Game Global Variables :
       0 = Unknown - Fixed at 2
       1 = Current Age / Stack
       2 = Page Being Held
       3 = Unknown - Fixed at 1
       4 = Slide Transitions
       5 = Ending
       6 = Red Pages in Book
       7 = Blue Pages in Book
    */
    struct Globals {
        uint16 u0;
        ActiveAge currentAge;
        HeldPage heldPage;
        uint16 u1;
        uint16 transitions; // Unused in ScummVM
        uint16 zipMode;     // Unused in ScummVM
        uint16 redPagesInBook;
        uint16 bluePagesInBook;
        DniEnding ending;
    } _globals;

    /* 50 Myst Specific Variables :
       0  = Marker Switch Near Cabin
       1  = Marker Switch Near Clock Tower
       2  = Marker Switch on Dock
       3  = Marker Switch Near Ship Pool
       4  = Marker Switch Near Gears
       5  = Marker Switch Near Generator Room
       6  = Marker Switch Near Stellar Observatory
       7  = Marker Switch Near Rocket Ship
       8  = Fireplace, Opened Green Book Before
       9  = Ship State
       10 = Cabin Gas Valve Position
       11 = Clock Tower Hour Hand Position
       12 = Clock Tower Minute Hand Position
       13 = Clock Tower Puzzle Solved / Gears Open
       14 = Clock Tower Gear Bridge
       15 = Generator Breaker State
       16 = Generator Button State
       17 = Generator Voltage State
       18 = Library Bookcase Door
       19 = Dock Imager Numeric Selection
       20 = Dock Imager Active
       21 = Unknown #1 - Fixed at 0
       22 = Unknown #2 - Fixed at 0
       23 = Unknown #3 - Fixed at 0
       24 = Unknown #4 - Fixed at 0
       25 = Tower Rotation Angle
       26 = Boxes For Ship Float Puzzle
       27 = Tree Boiler Pilot Light Lit
       28 = Stellar Observatory Viewer, Control Setting Day
       29 = Stellar Observatory Lights
       30 = Stellar Observatory Viewer, Control Setting Month
       31 = Stellar Observatory Viewer, Control Setting Time
       32 = Stellar Observatory Viewer, Control Setting Year
       33 = Stellar Observatory Viewer, Target Day
       34 = Stellar Observatory Viewer, Target Month
       35 = Stellar Observatory Viewer, Target Time
       36 = Stellar Observatory Viewer, Target Year
       37 = Cabin Safe Combination
       38 = Channelwood Tree Position
       39 = Checksum? #1
       40 = Checksum? #2
       41 = Rocketship Music Puzzle Slider #1 Position
       42 = Rocketship Music Puzzle Slider #2 Position
       43 = Rocketship Music Puzzle Slider #3 Position
       44 = Rocketship Music Puzzle Slider #4 Position
       45 = Rocketship Music Puzzle Slider #5 Position
       46 = Unknown #5
       47 = Unknown #6
       48 = Unknown #7
       49 = Unknown #8
    */
    struct Myst {
        uint32 cabinMarkerSwitch;
        uint32 clockTowerMarkerSwitch;
        uint32 dockMarkerSwitch;
        uint32 poolMarkerSwitch;
        uint32 gearsMarkerSwitch;
        uint32 generatorMarkerSwitch;
        uint32 observatoryMarkerSwitch;
        uint32 rocketshipMarkerSwitch;
        uint16 greenBookOpenedBefore;
        uint16 shipFloating;
        uint16 cabinValvePosition;
        uint16 clockTowerHourPosition;
        uint16 clockTowerMinutePosition;
        uint16 gearsOpen;
        uint16 clockTowerBridgeOpen;
        uint16 generatorBreakers;
        uint16 generatorButtons;
        uint16 generatorVoltage;
        uint16 libraryBookcaseDoor;
        uint16 imagerSelection;
        uint16 imagerActive;
        uint16 imagerWaterErased;
        uint16 imagerMountainErased;
        uint16 imagerAtrusErased;
        uint16 imagerMarkerErased;
        uint16 towerRotationAngle;
        uint16 courtyardImageBoxes;
        uint16 cabinPilotLightLit;
        uint16 observatoryDaySetting;
        uint16 observatoryLights;
        uint16 observatoryMonthSetting;
        uint16 observatoryTimeSetting;
        uint16 observatoryYearSetting;
        uint16 observatoryDayTarget;
        uint16 observatoryMonthTarget;
        uint16 observatoryTimeTarget;
        uint16 observatoryYearTarget;
        uint16 cabinSafeCombination;
        uint16 treePosition;
        uint32 treeLastMoveTime;
        uint16 rocketSliderPosition[5];
        uint16 observatoryDaySlider;
        uint16 observatoryMonthSlider;
        uint16 observatoryYearSlider;
        uint16 observatoryTimeSlider;
    } _myst;

    /* 7 Channelwood Specific Variables :
        0 = Water Pump Bridge State
        1 = Lower Walkway to Upper Walkway Elevator State
        2 = Lower Walkway to Upper Walkway Spiral Stair Lower Door State
        3 = Extendable Pipe State
        4 = Water Valve States
        5 = Achenar's Holoprojector Selection
        6 = Lower Walkway to Upper Walkway Spiral Stair Upper Door State
    */
    struct Channelwood {
        uint32 waterPumpBridgeState;
        uint32 elevatorState;
        uint32 stairsLowerDoorState;
        uint32 pipeState;
        uint16 waterValveStates;
        uint16 holoprojectorSelection;
        uint16 stairsUpperDoorState;
    } _channelwood;

    /* 8 Mech Specific Variables :
        0 = Achenar's Room Secret Panel State
        1 = Sirrus' Room Secret Panel State
        2 = Fortress Staircase State
        3 = Fortress Elevator Rotation
        4 = Code Lock Shape #1 (Left)
        5 = Code Lock Shape #2
        6 = Code Lock Shape #3
        7 = Code Lock Shape #4 (Right)
    */
    struct Mechanical {
        uint32 achenarCrateOpened;
        uint16 achenarPanelState;
        uint16 sirrusPanelState;
        uint16 staircaseState;
        uint16 elevatorRotation;
        uint16 codeShape[4];
    } _mechanical;

    /* 18 Selenitic Specific Variables :
        0 = Sound Pickup At Water Pool
        1 = Sound Pickup At Volcanic Crack
        2 = Sound Pickup At Clock
        3 = Sound Pickup At Crystal Rocks
        4 = Sound Pickup At Windy Tunnel
        5 = Sound Receiver Doors
        6 = Windy Tunnel Lights
        7 = Sound Receiver Current Input
        8 = Sound Receiver Input #0 (Water Pool) Angle Value
        9 = Sound Receiver Input #1 (Volcanic Crack) Angle Value
       10 = Sound Receiver Input #2 (Clock) Angle Value
       11 = Sound Receiver Input #3 (Crystal Rocks) Angle Value
       12 = Sound Receiver Input #4 (Windy Tunnel) Angle Value
       13 = Sound Lock Slider #1 (Left) Position
       14 = Sound Lock Slider #2 Position
       15 = Sound Lock Slider #3 Position
       16 = Sound Lock Slider #4 Position
       17 = Sound Lock Slider #5 (Right) Position
    */
    struct Selenitic {
        uint32 emitterEnabledWater;
        uint32 emitterEnabledVolcano;
        uint32 emitterEnabledClock;
        uint32 emitterEnabledCrystal;
        uint32 emitterEnabledWind;
        uint32 soundReceiverOpened;
        uint32 tunnelLightsSwitchedOn;
        uint16 soundReceiverCurrentSource;
        uint16 soundReceiverPositions[5];
        uint16 soundLockSliderPositions[5];
    } _selenitic;

    /* 14 Stoneship Specific Variables :
        0 = Light State
        1 = Secret side door opened
        2 = Water Pump State
        3 = Lighthouse Trapdoor State
        4 = Lighthouse Chest Water State
        5 = Lighthouse Chest Valve State
        6 = Lighthouse Chest Open State
        7 = Lighthouse Trapdoor Key State
        8 = Lighthouse Battery Duration
        9 = Lighthouse Battery Power Good
       10 = Lighthouse Battery Depletion Time
    */
    struct Stoneship {
        uint32 lightState;
        uint16 sideDoorOpened;
        uint16 pumpState;
        uint16 trapdoorState;
        uint16 chestWaterState;
        uint16 chestValveState;
        uint16 chestOpenState;
        uint16 trapdoorKeyState;
        uint32 generatorDuration;
        uint16 generatorPowerAvailable;
        uint32 generatorDepletionTime;
    } _stoneship;

    MystSaveMetadata _metadata;

private:
    void syncGameState(Common::Serializer &s, bool isME);
    static Common::String buildSaveFilename(int slot);
    static Common::String buildMetadataFilename(int slot);
    bool loadState(int slot);
    void loadMetadata(int slot);
    bool saveState(int slot);
    void updateMetadateForSaving(const Common::String &desc, bool autoSave);
    bool saveMetadata(int slot, const Graphics::Surface *thumbnail);

    // The values in these regions are lists of VIEW resources
    // which correspond to visited zip destinations

    typedef uint16 ZipDests[41];

    ZipDests _mystReachableZipDests;

    ZipDests _channelwoodReachableZipDests;

    ZipDests _mechReachableZipDests;

    ZipDests _seleniticReachableZipDests;

    ZipDests _stoneshipReachableZipDests;

    MohawkEngine_Myst *_vm;
    Common::SaveFileManager *_saveFileMan;
};

} // End of namespace Mohawk

#endif