prince.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 PRINCE_PRINCE_H
#define PRINCE_PRINCE_H

#include "common/random.h"
#include "common/system.h"
#include "common/debug.h"
#include "common/debug-channels.h"
#include "common/textconsole.h"
#include "common/rect.h"
#include "common/events.h"
#include "common/endian.h"
#include "common/savefile.h"
#include "common/serializer.h"

#include "image/bmp.h"

#include "gui/debugger.h"

#include "engines/engine.h"
#include "engines/util.h"

#include "audio/mixer.h"

#include "video/flic_decoder.h"

#include "prince/mob.h"
#include "prince/object.h"
#include "prince/pscr.h"
#include "prince/detection.h"

namespace Prince {

struct SavegameHeader;

class PrinceEngine;
class GraphicsMan;
class Script;
class Interpreter;
class InterpreterFlags;
class Debugger;
class MusicPlayer;
class VariaTxt;
class Cursor;
class MhwanhDecoder;
class Font;
class Hero;
class Animation;
class Room;
class Pscr;

struct SavegameHeader {
    uint8 version;
    Common::String saveName;
    Graphics::Surface *thumbnail;
    int16 saveYear, saveMonth, saveDay;
    int16 saveHour, saveMinutes;
    uint32 playTime;
};

#define kSavegameStrSize 14
#define kSavegameStr "SCUMMVM_PRINCE"

struct Text {
    const char *_str;
    uint16 _x, _y;
    uint16 _time;
    uint32 _color;

    Text() {
        clear();
    }

    void clear() {
        _str = nullptr;
        _x = 0;
        _y = 0;
        _time = 0;
        _color = 255;
    }
};

struct AnimListItem {
    uint16 _type; // type of animation - for background anims RND of frame
    uint16 _fileNumber;
    uint16 _startPhase; // first phase number
    uint16 _endPhase;
    uint16 _loopPhase;
    int16 _x;
    int16 _y;
    uint16 _loopType;
    uint16 _nextAnim; // number of animation to do for loop = 3
    uint16 _flags; // byte 0 - draw masks, byte 1 - draw in front of mask, byte 2 - load but turn off drawing
    bool loadFromStream(Common::SeekableReadStream &stream);
};

struct BAS {
    int32 _type; // type of sequence
    int32 _data; // additional data
    int32 _anims; // number of animations
    int32 _current; // actual number of animation
    int32 _counter; // time counter for animation
    int32 _currRelative; //actual relative number for animation
    int32 _data2; // additional data for measurements
};

const int kStructSizeBAS = 28;

struct BASA {
    int16 _num; // animation number
    int16 _start;   // initial frame
    int16 _end; // final frame
    //int16 _pad;   // fulfilment to 8 bytes
};

const int kStructSizeBASA = 8;

// background and normal animation
struct Anim {
    BASA _basaData;
    int32 _addr; // animation address
    int16 _usage;
    int16 _state; // state of animation: 0 - turning on, 1 - turning off
    int16 _flags;
    int16 _frame; // number of phase to show
    int16 _lastFrame; // last phase
    int16 _loopFrame; // first frame of loop
    int16 _showFrame; // actual visible frame of animation
    int16 _loopType;     // type of loop (0 - last frame; 1 - normal loop (begin from _loopFrame); 2 - no loop; 3 - load new animation)
    int16 _nextAnim; // number of next animation to load after actual
    int16 _x;
    int16 _y;
    int32 _currFrame;
    int16 _currX;
    int16 _currY;
    int16 _currW;
    int16 _currH;
    int16 _packFlag;
    int32 _currShadowFrame;
    int16 _packShadowFlag;
    int32 _shadowBack;
    int16 _relX;
    int16 _relY;
    Animation *_animData;
    Animation *_shadowData;

    enum AnimOffsets {
        kAnimState = 10,
        kAnimFrame = 14,
        kAnimLastFrame = 16,
        kAnimX = 26
    };

    int16 getAnimData(Anim::AnimOffsets offset) {
        switch (offset) {
        case kAnimState:
            return _state;
        case kAnimFrame:
            return _frame + 1; // fix for location 30 - man with a dog animation
        case kAnimX:
            return _x;
        default:
            error("getAnimData() - Wrong offset type: %d", (int)offset);
        }
    }

    void setAnimData(Anim::AnimOffsets offset, int16 value) {
        if (offset == kAnimX) {
            _x = value;
        } else {
            error("setAnimData() - Wrong offset: %d, value: %d", (int)offset, value);
        }
    }
};

struct BackgroundAnim {
    BAS _seq;
    Common::Array<Anim> backAnims;
};

enum AnimType {
    kBackgroundAnimation,
    kNormalAnimation
};

// Nak (PL - Nakladka)
struct Mask {
    uint16 _state; // visible / invisible
    int16 _flags; // turning on / turning off of a mask
    int16 _x1;
    int16 _y1;
    int16 _x2;
    int16 _y2;
    int16 _z;
    int16 _number; // number of mask for background recreating
    int16 _width;
    int16 _height;
    byte *_data;

    int16 getX() const {
        return READ_LE_UINT16(_data);
    }

    int16 getY() const {
        return READ_LE_UINT16(_data + 2);
    }

    int16 getWidth() const {
        return READ_LE_UINT16(_data + 4);
    }

    int16 getHeight() const {
        return READ_LE_UINT16(_data + 6);
    }

    byte *getMask() const {
        return (byte *)(_data + 8);
    }
};

struct InvItem {
    int _x;
    int _y;
    Graphics::Surface *_surface;
    Graphics::Surface *getSurface() const { return _surface; }
};

struct DrawNode {
    int posX;
    int posY;
    int posZ;
    int32 width;
    int32 height;
    int32 scaleValue;
    Graphics::Surface *s;
    Graphics::Surface *originalRoomSurface;
    void *data;
    void (*drawFunction)(Graphics::Surface *, DrawNode *);
};

struct DebugChannel {

enum Type {
    kScript = 1 << 0,
    kEngine = 1 << 1
};

};

class PrinceEngine : public Engine {
protected:
    Common::Error run() override;

public:
    PrinceEngine(OSystem *syst, const PrinceGameDescription *gameDesc);
    ~PrinceEngine() override;

    bool scummVMSaveLoadDialog(bool isSave);

    bool hasFeature(EngineFeature f) const override;
    void pauseEngineIntern(bool pause) override;
    bool canSaveGameStateCurrently(Common::U32String *msg = nullptr) override;
    bool canLoadGameStateCurrently(Common::U32String *msg = nullptr) override;
    Common::Error saveGameState(int slot, const Common::String &desc, bool isAutosave = false) override;
    Common::Error loadGameState(int slot) override;

    void playVideo(const Common::Path &videoFilename);

    WARN_UNUSED_RESULT static bool readSavegameHeader(Common::InSaveFile *in, SavegameHeader &header, bool skipThumbnail = true);
    void writeSavegameHeader(Common::OutSaveFile *out, SavegameHeader &header);
    void syncGame(Common::SeekableReadStream *readStream, Common::WriteStream *writeStream);
    bool loadGame(int slotNumber);
    void resetGame();

    int32 _creditsDataSize;
    byte *_creditsData;
    void scrollCredits();

    int getGameType() const;
    const char *getGameId() const;
    uint32 getFeatures() const;
    Common::Language getLanguage() const;

    const PrinceGameDescription *_gameDescription;
    Video::FlicDecoder _flicPlayer;
    const Graphics::Surface *_flcFrameSurface;
    VariaTxt *_variaTxt;

    uint32 _talkTxtSize;
    byte *_talkTxt;

    uint32 _mobTranslationSize;
    byte *_mobTranslationData;

    bool _missingVoice;

    bool loadLocation(uint16 locationNr);
    bool loadAnim(uint16 animNr, bool loop);
    bool loadVoice(uint32 textSlot, uint32 sampleSlot, const Common::String &name);
    bool loadSample(uint32 sampleSlot, const Common::String &name);
    bool loadZoom(byte *zoomBitmap, uint32 dataSize, const char *resourceName);
    bool loadShadow(byte *shadowBitmap, uint32 dataSize, const char *resourceName1, const char *resourceName2);
    bool loadTrans(byte *transTable, const char *resourceName);
    bool loadMobPriority(const char *resourceName);

    void loadMobTranslationTexts();
    void setMobTranslationTexts();

    bool loadMusic(int musNumber);
    void stopMusic();

    void playSample(uint16 sampleId, uint16 loopType);
    void stopSample(uint16 sampleId);
    void stopAllSamples();
    void freeSample(uint16 sampleId);
    void freeAllSamples();

    void setVoice(uint16 slot, uint32 sampleSlot, uint16 flag);

    void changeCursor(uint16 curId);
    void printAt(uint32 slot, uint8 color, char *s, uint16 x, uint16 y);
    int calcTextLines(const char *s);
    int calcTextTime(int numberOfLines);
    void correctStringDEU(char *s);

    static const uint8 kMaxTexts = 32;
    Text _textSlots[kMaxTexts];

    Hero *_mainHero;
    Hero *_secondHero;

    enum HeroId {
        kMainHero,
        kSecondHero
    };

    int _mouseFlag;
    uint32 _currentTime;
    uint16 _locationNr;
    uint16 _sceneWidth;
    int32 _picWindowX;
    int32 _picWindowY;

    Image::BitmapDecoder *_roomBmp;
    MhwanhDecoder *_suitcaseBmp;
    Room *_room;
    Script *_script;
    InterpreterFlags *_flags;
    Interpreter *_interpreter;
    GraphicsMan *_graph;
    uint8 _currentMidi;
    byte *_zoomBitmap;
    byte *_shadowBitmap;
    byte *_transTable;

    int16 _scaleValue; // scale for hero or special shadow animation
    int16 _lightX; // for hero shadow
    int16 _lightY;
    int32 _shadScaleValue;
    int32 _shadLineLen;
    byte *_shadowLine;
    void setShadowScale(int32 shadowScale);

    static const int16 kFPS = 15;
    static const int32 kIntMax = 2147483647;

    static const int16 kMaxPicWidth = 1280;
    static const int16 kMaxPicHeight = 480;
    static const int16 kZoomStep = 4;
    static const int32 kZoomBitmapLen = kMaxPicHeight / kZoomStep * kMaxPicWidth / kZoomStep;
    static const int32 kShadowBitmapSize = kMaxPicWidth * kMaxPicHeight / 8;
    static const int16 kShadowLineArraySize = 2 * 1280 * 4;
    static const int16 kZoomBitmapWidth = kMaxPicWidth / kZoomStep;
    static const int16 kZoomBitmapHeight = kMaxPicHeight / kZoomStep;
    static const int16 kNormalWidth = 640;
    static const int16 kNormalHeight = 480;
    static const uint32 kTransTableSize = 256 * 256;

    static const int kMaxNormAnims = 64;
    static const int kMaxBackAnims = 64;
    static const int kMaxObjects = 64;
    static const int kMaxMobs = 64;

    Common::Array<DrawNode> _drawNodeList;
    Common::Array<AnimListItem> _animList;
    Common::Array<BackgroundAnim> _backAnimList;
    Common::Array<Anim> _normAnimList;
    Common::Array<Mob> _mobList;
    Common::Array<uint32> _mobPriorityList;
    Common::Array<Mask> _maskList;
    Common::Array<Object *> _objList;
    uint16 *_objSlot;

    void freeNormAnim(int slot);
    void freeAllNormAnims();
    void removeSingleBackAnim(int slot);

    Common::RandomSource _randomSource;

    void checkMasks(int x1, int y1, int sprWidth, int sprHeight, int z);
    void insertMasks(Graphics::Surface *originalRoomSurface);
    void showMask(int maskNr, Graphics::Surface *originalRoomSurface);
    void clsMasks();

    void grabMap();

    int _selectedMob; // number of selected Mob / inventory item
    int _selectedItem; // number of item on mouse cursor
    int _selectedMode;
    int _currentPointerNumber;

    static const int16 kMaxInv = 90; // max amount of inventory items in whole game
    static const uint16 kMaxItems = 30; // size of inventory

    uint32 _invTxtSize;
    byte *_invTxt;

    Graphics::Surface *_optionsPic;
    Graphics::Surface *_optionsPicInInventory;

    bool _optionsFlag;
    int _optionEnabled;
    int _optionsMob;
    int _optionsX;
    int _optionsY;
    int _optionsWidth;
    int _optionsHeight;
    int _invOptionsWidth;
    int _invOptionsHeight;
    int _optionsStep;
    int _invOptionsStep;
    int _optionsNumber;
    int _invOptionsNumber;
    int _optionsColor1; // color for non-selected options
    int _optionsColor2; // color for selected option

    bool _showInventoryFlag;
    int _invExamY;
    bool _inventoryBackgroundRemember;
    int _invLineX;
    int _invLineY;
    int _invLine;  // number of items in one line
    int _invLines; // number of lines with inventory items
    int _invLineW;
    int _invLineH;
    int _maxInvW;
    int _maxInvH;
    int _invLineSkipX;
    int _invLineSkipY;
    int _invX1;
    int _invY1;
    int _invWidth;
    int _invHeight;
    bool _invCurInside;
    int _mst_shadow;
    int _mst_shadow2; // blinking after adding new item
    int _candleCounter; // special counter for candle inventory item
    int _invMaxCount; // time to turn inventory on
    int _invCounter; // turning on counter

    void inventoryFlagChange(bool inventoryState);
    bool loadAllInv();
    void rememberScreenInv();
    void prepareInventoryToView();
    void drawInvItems();
    void displayInventory();
    void addInv(int heroId, int item, bool addItemQuiet);
    void remInv(int heroId, int item);
    void clearInv(int heroId);
    void swapInv(int heroId);
    void addInvObj();
    void makeInvCursor(int itemNr);
    void enableOptions(bool checkType);
    void checkOptions();
    void checkInvOptions();
    void openInventoryCheck();

    void leftMouseButton();
    void rightMouseButton();
    void inventoryLeftMouseButton();
    void inventoryRightMouseButton();
    void dialogLeftMouseButton(byte *string, int dialogSelected);

    uint32 _dialogDatSize;
    byte *_dialogDat;
    byte *_dialogData; // on, off flags for lines of dialog text

    byte *_dialogBoxAddr[32]; // adresses of dialog windows
    byte *_dialogOptAddr[32]; // adresses of dialog options
    int _dialogOptLines[4 * 32]; // numbers of initial dialog lines

    byte *_dialogText;
    int _dialogLines;
    bool _dialogFlag;
    int _dialogWidth;
    int _dialogHeight;
    int _dialogLineSpace;
    int _dialogColor1; // color for non-selected options
    int _dialogColor2; // color for selected option
    Graphics::Surface *_dialogImage;

    void createDialogBox(int dialogBoxNr);
    void dialogRun();
    void talkHero(int slot);
    void doTalkAnim(int animNumber, int slot, AnimType animType);

    static const uint8 zoomInStep = 8;
    void initZoomIn(int slot);
    void initZoomOut(int slot);
    void doZoomIn(int slot);
    void doZoomOut(int slot);
    void freeZoomObject(int slot);

    static const uint8 kFadeStep = 4;
    void blackPalette();
    void setPalette(const byte *palette);

    int getMob(Common::Array<Mob> &mobList, bool usePriorityList, int posX, int posY);

    // 'Throw a rock' mini-game:
    static const int16 kCurveLen = 17;
    static const int kCelStep = 4;
    int16 *_curveData;
    int _curvPos;
    void makeCurve();
    void getCurve();
    void mouseWeirdo();

    static const uint16 kPowerBarPosX = 288;
    static const uint16 kPowerBarPosY = 430;
    static const uint8 kPowerBarWidth = 64;
    static const uint8 kPowerBarHeight = 16;
    static const uint8 kPowerBarBackgroundColor = 0;
    static const uint16 kPowerBarGreenPosY = 434;
    static const uint8 kPowerBarGreenColor1 = 202;
    static const uint8 kPowerBarGreenColor2 = 235;
    static const uint8 kPowerBarGreenHeight = 8;
    void showPower();

    // Pathfinding
    static const int16 kPathGridStep = 2;
    static const uint32 kPathBitmapLen = (kMaxPicHeight / kPathGridStep * kMaxPicWidth / kPathGridStep) / 8;
    static const int32 kTracePts = 8000;
    static const int32 kPBW = kMaxPicWidth / 16; // PathBitmapWidth
    static const int kMinDistance = 2500;

    byte *_roomPathBitmap; // PL - Sala
    byte *_roomPathBitmapTemp; // PL - SSala
    byte *_coordsBufEnd;
    byte *_coordsBuf; // optimal path
    byte *_coords; // last path point address from coordsBuf
    byte *_coordsBuf2;
    byte *_coords2;
    byte *_coordsBuf3;
    byte *_coords3;
    int _traceLineLen;
    bool _traceLineFirstPointFlag; // if plotTraceLine after first point
    bool _tracePointFirstPointFlag; // if plotTracePoint after first point
    byte *_directionTable;
    int _shanLen;

    byte *_checkBitmapTemp;
    byte *_checkBitmap;
    int _checkMask;
    int _checkX;
    int _checkY;

    byte *_rembBitmapTemp;
    byte *_rembBitmap;
    int _rembMask;
    int _rembX;
    int _rembY;

    int _fpX;
    int _fpY;

    int drawLine(int x0, int y0, int x1, int y1, int (*plotProc)(int, int, void *), void *data);
    bool loadPath(const char *resourceName);
    byte *makePath(int heroId, int currX, int currY, int destX, int destY);
    void findPoint(int x, int y);
    int getPixelAddr(byte *pathBitmap, int x, int y);
    static int plotTraceLine(int x, int y, void *data);
    void specialPlotInside(int x, int y);
    bool tracePath(int x1, int y1, int x2, int y2);
    Direction makeDirection(int x1, int y1, int x2, int y2);
    void specialPlot(int x, int y);
    void specialPlot2(int x, int y);
    void allocCoords2();
    void freeCoords2();
    void freeCoords3();
    static int plotTracePoint(int x, int y, void *data);
    void specialPlotInside2(int x, int y);
    void approxPath();
    void freeDirectionTable();
    void scanDirections();
    int scanDirectionsFindNext(byte *coords, int xDiff, int yDiff);
    void moveShandria();
    void walkTo();
    void moveRunHero(int heroId, int x, int y, int dir, bool runHeroFlag);

    int leftDownDir();
    int leftDir();
    int leftUpDir();
    int rightDownDir();
    int rightDir();
    int rightUpDir();
    int upLeftDir();
    int upDir();
    int upRightDir();
    int downLeftDir();
    int downDir();
    int downRightDir();

    int cpe();
    int checkLeftDownDir();
    int checkLeftDir();
    int checkDownDir();
    int checkUpDir();
    int checkRightDir();
    int checkLeftUpDir();
    int checkRightDownDir();
    int checkRightUpDir();

private:
    bool playNextFLCFrame();
    void keyHandler(Common::Event event);
    int checkMob(Graphics::Surface *screen, Common::Array<Mob> &mobList, bool usePriorityList);
    void drawScreen();
    void showTexts(Graphics::Surface *screen);
    void init();
    void showLogo();
    void showAnim(Anim &anim);
    void showNormAnims();
    void setBackAnim(Anim &backAnim);
    void showBackAnims();
    void clearBackAnimList();
    bool spriteCheck(int sprWidth, int sprHeight, int destX, int destY);
    void showSprite(Graphics::Surface *spriteSurface, int destX, int destY, int destZ);
    void showSpriteShadow(Graphics::Surface *shadowSurface, int destX, int destY, int destZ);
    void showObjects();
    void showParallax();
    static bool compareDrawNodes(DrawNode d1, DrawNode d2);
    void runDrawNodes();
    void makeShadowTable(int brightness);
    void pausePrinceEngine(int fps = kFPS);

    uint32 getTextWidth(const char *s);
    void debugEngine(const char *s, ...);

    uint8 _cursorNr;

    Common::RandomSource *_rnd;
    Cursor *_cursor1;
    Graphics::Surface *_cursor2;
    Cursor *_cursor3;
    Debugger *_debugger;
    Font *_font;
    MusicPlayer *_midiPlayer;

    static const int kMaxSamples = 60;
    Audio::RewindableAudioStream *_audioStream[kMaxSamples];
    Audio::SoundHandle _soundHandle[kMaxSamples];

    Common::Array<PScr *> _pscrList;
    Common::Array<InvItem> _allInvList;
    Common::Array<Mob> _invMobList;

    bool _flicLooped;

    void mainLoop();

};

} // End of namespace Prince

#endif