/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001  Ludvig Strigeus
 * Copyright (C) 2001-2006 The ScummVM project
 *
 * 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 2
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *
 */

#ifndef AGOS_AGOS_H
#define AGOS_AGOS_H

#include "engines/engine.h"

#include "common/rect.h"
#include "common/util.h"

#include "agos/animation.h"
#include "agos/midi.h"
#include "agos/sound.h"
#include "agos/vga.h"

namespace AGOS {

/* Enable and set to zone number number to dump */
//#define DUMP_FILE_NR 8
//#define DUMP_BITMAPS_FILE_NR 8

uint fileReadItemID(Common::SeekableReadStream *in);

#define CHECK_BOUNDS(x, y) assert((uint)(x) < ARRAYSIZE(y))

struct Child;
struct SubObject;

struct Item;
struct WindowBlock;
struct Subroutine;
struct SubroutineLine;
struct TimeEvent;

struct TextLocation {
	int16 x, y, width;
	TextLocation() { memset(this, 0, sizeof(*this)); }
};

struct HitArea {
	uint16 x, y;
	uint16 width, height;
	uint16 flags;
	uint16 id;
	uint16 data;
	WindowBlock *window;
	Item *item_ptr;
	uint16 verb;
	uint16 priority;
	HitArea() { memset(this, 0, sizeof(*this)); }
};

struct VgaPointersEntry {
	byte *vgaFile1;
	byte *vgaFile1End;
	byte *vgaFile2;
	byte *vgaFile2End;
	byte *sfxFile;
	byte *sfxFileEnd;
	VgaPointersEntry() { memset(this, 0, sizeof(*this)); }
};

struct VgaSprite {
	uint16 id;
	uint16 image;
	uint16 palette;
	uint16 x, y;									/* actually signed numbers */
	uint16 flags;
	uint16 priority;
	uint16 windowNum, zoneNum;
	VgaSprite() { memset(this, 0, sizeof(*this)); }
};

struct VgaSleepStruct {
	uint16 ident;
	const byte *code_ptr;
	uint16 sprite_id;
	uint16 cur_vga_file;
	VgaSleepStruct() { memset(this, 0, sizeof(*this)); }
};

struct VgaTimerEntry {
	int16 delay;
	const byte *script_pointer;
	uint16 sprite_id;
	uint16 cur_vga_file;
	VgaTimerEntry() { memset(this, 0, sizeof(*this)); }
};

enum SIMONGameType {
	GType_ELVIRA1 = 0,
	GType_ELVIRA2 = 1,
	GType_WW = 2,
	GType_SIMON1 = 3,
	GType_SIMON2 = 4,
	GType_FF = 6,
	GType_PP = 7
};

struct AGOSGameDescription;

struct GameSpecificSettings;

class Debugger;

class AGOSEngine : public Engine {
	friend class Debugger;
	friend class MoviePlayer;

	GUI::Debugger *getDebugger();

	typedef void (AGOSEngine::*OpcodeProc) ();

	void setupCommonOpcodes(OpcodeProc *op);

	void setupElvira1Opcodes(OpcodeProc *op);
	void setupElvira2Opcodes(OpcodeProc *op);
	void setupWaxworksOpcodes(OpcodeProc *op);
	void setupSimon1Opcodes(OpcodeProc *op);
	void setupSimon2Opcodes(OpcodeProc *op);
	void setupFeebleOpcodes(OpcodeProc *op);
	void setupPuzzleOpcodes(OpcodeProc *op);

	void setupOpcodes();
	OpcodeProc _opcode_table[300];
	int _numOpcodes;

	typedef void (AGOSEngine::*VgaOpcodeProc) ();

	void setupVgaOpcodes();
	VgaOpcodeProc _vga_opcode_table[100];
	uint _numVideoOpcodes;

	void setupCommonVideoOpcodes(VgaOpcodeProc *op);

	void setupElvira1VideoOpcodes(VgaOpcodeProc *op);
	void setupElvira2VideoOpcodes(VgaOpcodeProc *op);
	void setupWaxworksVideoOpcodes(VgaOpcodeProc *op);
	void setupSimon1VideoOpcodes(VgaOpcodeProc *op);
	void setupSimon2VideoOpcodes(VgaOpcodeProc *op);
	void setupFeebleVideoOpcodes(VgaOpcodeProc *op);

public:
	const AGOSGameDescription *_gameDescription;

	bool initGame(void);
	void setupGame();

	int getGameId() const;
	int getGameType() const;
	uint32 getFeatures() const;
	const char *getExtra() const;
	Common::Language getLanguage() const;
	Common::Platform getPlatform() const;
	const char *getFileName(int type) const;

protected:
	void playSting(uint a);

	const byte *_vcPtr;								/* video code ptr */
	uint16 _vc_get_out_of_code;


	uint32 *_gameOffsetsPtr;

	uint _numBitArray1, _numBitArray2, _numBitArray3;
	uint _numItemStore, _numVars;
	uint _vgaBaseDelay;

	uint _musicIndexBase;
	uint _soundIndexBase;
	uint _tableIndexBase;
	uint _textIndexBase;

	uint _itemMemSize;
	uint _tableMemSize;
	uint _vgaMemSize;

	const GameSpecificSettings *gss;

	byte _keyPressed;

	typedef enum {
		FORMAT_NONE,
		FORMAT_MP3,
		FORMAT_WAV,
		FORMAT_VOC
	} SoundFormat;

	Common::File *_gameFile;

	byte *_strippedTxtMem;
	byte *_textMem;
	uint _textSize;
	uint _stringTabNum, _stringTabPos, _stringtab_numalloc;
	byte **_stringTabPtr;

	Item **_itemArrayPtr;
	uint _itemArraySize;
	uint _itemArrayInited;

	byte *_itemHeapPtr;
	uint _itemHeapCurPos;
	uint _itemHeapSize;

	byte *_iconFilePtr;

	const byte *_codePtr;

	byte **_localStringtable;
	uint _stringIdLocalMin, _stringIdLocalMax;

	byte *_menuBase;
	byte *_roomsList;

	byte *_xtblList;
	byte *_xtablesHeapPtrOrg;
	uint _xtablesHeapCurPosOrg;
	Subroutine *_xsubroutineListOrg;

	byte *_tblList;
	byte *_tablesHeapPtr, *_tablesHeapPtrOrg, *_tablesheapPtrNew;
	uint _tablesHeapSize, _tablesHeapCurPos, _tablesHeapCurPosOrg;
	uint _tablesHeapCurPosNew;
	Subroutine *_subroutineListOrg;

	Subroutine *_subroutineList;
	uint _subroutine;

	uint _dxSurfacePitch;

	uint _recursionDepth;

	uint32 _lastVgaTick;

	uint16 _marks;

	bool _scriptVar2;
	bool _runScriptReturn1;
	bool _runScriptCondition[40];
	int _runScriptReturn[40];
	bool _skipVgaWait;
	bool _noParentNotify;
	bool _beardLoaded;
	bool _litBoxFlag;
	bool _mortalFlag;
	bool _updateScreen;
	bool _syncFlag2;
	bool _inCallBack;
	bool _cepeFlag;
	byte _copyPartialMode;
	bool _fastMode;
	bool _useBackGround;

	uint16 _debugMode;
	uint16 _language;
	bool _copyProtection;
	bool _pause;
	bool _startMainScript;
	bool _continousMainScript;
	bool _startVgaScript;
	bool _continousVgaScript;
	bool _drawImagesDebug;
	bool _dumpImages;
	bool _speech;
	bool _subtitles;
	bool _vgaVar9;
	int16 _chanceModifier;
	bool _restoreWindow6;
	int _scrollX, _scrollXMax, _scrollWidth;
	int _scrollY, _scrollYMax, _scrollHeight;
	int _scrollCount, _scrollFlag;
	const byte *_scrollImage;
	byte _boxStarHeight;

	char _boxBuffer[310];
	int _boxLineCount;
	int _lineCounts[6];
	char *_linePtrs[6];
	int _boxCR;

	SubroutineLine *_classLine;
	uint _classMask, _classMode1, _classMode2;
	Item *_findNextPtr;
	Subroutine *_currentTable;
	SubroutineLine *_currentLine;

	int _agosMenu;
	byte _textMenu[10];
	uint _superRoomNumber;
	uint _wallOn;

	uint16 _hyperLink, _newLines;
 	uint16 _oracleMaxScrollY, _noOracleScroll;
 	uint16 _interactY;

	int16 _scriptVerb, _scriptNoun1, _scriptNoun2;
	int16 _scriptAdj1, _scriptAdj2;

	uint16 _curWindow;
	WindowBlock *_textWindow;

	Item *_subjectItem, *_objectItem;
	Item *_currentPlayer;

	Item *_hitAreaObjectItem;
	HitArea *_lastHitArea;
	HitArea *_lastNameOn;
	HitArea *_lastHitArea3;
	Item *_hitAreaSubjectItem;
	HitArea *_currentBox, *_currentVerbBox, *_lastVerbOn;
	uint _needHitAreaRecalc;
	uint _verbHitArea;
	uint16 _defaultVerb;
	uint _iOverflow;
	uint _nameLocked;

	uint _dragAccept;
	uint _dragFlag;
	uint _dragMode;
	uint _dragCount;
	uint _dragEnd;
	HitArea *_lastClickRem;

	uint16 _windowNum;

	uint _printCharCurPos, _printCharMaxPos, _printCharPixelCount;
	uint _numLettersToPrint;

	uint _numTextBoxes;

	uint _lastTime;
	uint32 _clockStopped, _gameStoppedClock, _gameTime;
	time_t _timeStore;

	TimeEvent *_firstTimeStruct, *_pendingDeleteTimeEvent;

	int _mouseX, _mouseY;
	int _mouseXOld, _mouseYOld;

	byte *_mouseData;
	byte _animatePointer;
	byte _maxCursorWidth, _maxCursorHeight;
	byte _mouseAnim, _mouseAnimMax, _mouseCursor;
	byte _currentMouseAnim, _currentMouseCursor;
	byte _oldMouseAnimMax, _oldMouseCursor;
	uint _mouseHideCount;
	bool _mouseToggle;

	byte _leftButtonDown;
	byte _leftButton, _leftButtonCount, _leftButtonOld;
	byte _rightButtonDown;
	bool _noRightClick;

	Item *_dummyItem1;
	Item *_dummyItem2;
	Item *_dummyItem3;

	volatile uint16 _lockWord;
	uint16 _scrollUpHitArea;
	uint16 _scrollDownHitArea;

	bool _fastFadeOutFlag;
	bool _unkPalFlag;
	bool _usePaletteDelay;
	byte _paletteFlag;
	int _bottomPalette;
	uint _fastFadeCount;
	volatile uint16 _fastFadeInFlag;

	int _screenWidth, _screenHeight;

	uint16 _noOverWrite;
	bool _rejectBlock;

	bool _exitCutscene, _picture8600;

	uint _soundFileId;
	int16 _lastMusicPlayed;
	int16 _nextMusicToPlay;

	bool _showPreposition;
	bool _showMessageFlag;

	uint _vgaSpriteChanged;

	byte *_block, *_blockEnd;
	byte *_vgaMemPtr, *_vgaMemEnd, *_vgaMemBase;
	byte *_vgaFrozenBase, *_vgaRealBase;
	byte *_zoneBuffers;

	byte *_curVgaFile1;
	byte *_curVgaFile2;
	byte *_curSfxFile;

	uint16 _syncCount, _timer5, _timer4;

	uint16 _frameRate;

	uint16 _zoneNumber;
	uint16 _vgaWaitFor, _lastVgaWaitFor;
	uint16 _vgaCurSpriteId, _vgaCurZoneNum;
	uint16 _vgaCurSpritePriority;

	int16 _baseY;
	float _scale;
	Common::Rect _feebleRect;
	int _scaleX, _scaleY, _scaleWidth, _scaleHeight;

	VgaTimerEntry *_nextVgaTimerToProcess;

	Item *_objectArray[50];
	Item *_itemStore[50];

	uint16 _shortText[40];
	uint16 _shortTextX[40];
	uint16 _shortTextY[40];
	uint16 _longText[40];
	uint16 _longSound[40];

	uint16 _bitArray[128];
	uint16 _bitArrayTwo[16];
	uint16 _bitArrayThree[16];
	int16 *_variableArray;
	int16 *_variableArray2;
	int16 *_variableArrayPtr;

	WindowBlock *_dummyWindow;
	WindowBlock *_windowArray[8];

	byte _fcsData1[8];
	bool _fcsData2[8];

	TextLocation _textLocation1, _textLocation2, _textLocation3, _textLocation4;

	int _freeStringSlot;

	byte _stringReturnBuffer[2][180];

	HitArea _hitAreas[250];

	VgaPointersEntry _vgaBufferPointers[450];
	VgaSprite _vgaSprites[200];
	VgaSleepStruct _waitSyncTable[60];
	VgaSleepStruct _waitEndTable[60];

	const uint16 *_pathFindArray[100];

	uint8 _pathValues[400];
	uint16 _PVCount;
	uint16 _GPVCount;

	uint8 _pathValues1[400];
	uint16 _PVCount1;
	uint16 _GPVCount1;

	uint8 _currentPalette[1024];
	uint8 _displayPalette[1024];

	byte *_planarBuf;
	byte _videoBuf1[32000];
	uint16 _videoWindows[128];

	VgaTimerEntry _vgaTimerList[205];

	WindowBlock *_windowList;

	byte _lettersToPrintBuf[80];

	MidiPlayer midi;
	bool _native_mt32;

	int _vgaTickCounter;

	MoviePlayer *_moviePlay;
	Audio::SoundHandle _modHandle;

	Sound *_sound;

	bool _effectsPaused;
	bool _ambientPaused;
	bool _musicPaused;

	Debugger *_debugger;

	int _saveLoadRowCurPos;
	int _numSaveGameRows;
	bool _saveDialogFlag;
	bool _saveOrLoad;
	bool _saveLoadEdit;

	byte _saveLoadType, _saveLoadSlot;
	char _saveLoadName[108];

	bool _oopsValid;

	int _sdlMouseX, _sdlMouseY;

	byte *_backGroundBuf;
	byte *_frontBuf;
	byte *_backBuf;
	byte *_scaleBuf;

	Common::RandomSource _rnd;

	const byte *_vc10BasePtrOld;
	byte _hebrewCharWidths[32];

public:
	AGOSEngine(OSystem *syst);
	virtual ~AGOSEngine();

protected:
	uint16 to16Wrapper(uint value);
	uint16 readUint16Wrapper(const void *src);
	uint32 readUint32Wrapper(const void *src);

	int allocGamePcVars(Common::SeekableReadStream *in);
	void createPlayer();
	void allocateStringTable(int num);
	void setupStringTable(byte *mem, int num);
	void setupLocalStringTable(byte *mem, int num);
	void readGamePcText(Common::SeekableReadStream *in);
	void readItemChildren(Common::SeekableReadStream *in, Item *item, uint tmp);
	void readItemFromGamePc(Common::SeekableReadStream *in, Item *item);
	void loadGamePcFile();
	void readGamePcFile(Common::SeekableReadStream *in);
	void decompressData(const char *srcName, byte *dst, uint32 offset, uint32 srcSize, uint32 dstSize);
	void loadOffsets(const char *filename, int number, uint32 &file, uint32 &offset, uint32 &compressedSize, uint32 &size);
	void loadSound(uint sound, int pan, int vol, uint type);
	void loadVoice(uint speechId);

	int getUserFlag(Item *item, int a);
	int getUserFlag1(Item *item, int a);
	int getUserItem(Item *item, int n);
	void setUserFlag(Item *item, int a, int b);
	void setUserItem(Item *item, int n, int m);

	void paletteFadeOut(byte *palPtr, uint num, uint size);
	
	byte *allocateItem(uint size);
	byte *allocateTable(uint size);
	void alignTableMem();

	Child *findChildOfType(Item *i, uint child);
	Child *allocateChildBlock(Item *i, uint type, uint size);

	void allocItemHeap();
	void allocTablesHeap();

	Subroutine *createSubroutine(uint a);
	void readSubroutine(Common::SeekableReadStream *in, Subroutine *sub);
	SubroutineLine *createSubroutineLine(Subroutine *sub, int a);
	void readSubroutineLine(Common::SeekableReadStream *in, SubroutineLine *new_table, Subroutine *sub);
	byte *readSingleOpcode(Common::SeekableReadStream *in, byte *ptr);
	void readSubroutineBlock(Common::SeekableReadStream *in);

	Subroutine *getSubroutineByID(uint subroutine_id);

	/* used in debugger */
	void dumpAllSubroutines();
	void dumpSubroutines();
	void dumpSubroutine(Subroutine *sub);
	void dumpSubroutineLine(SubroutineLine *sl, Subroutine *sub);
	const byte *dumpOpcode(const byte *p);

	int startSubroutine(Subroutine *sub);
	int startSubroutineEx(Subroutine *sub);

	bool checkIfToRunSubroutineLine(SubroutineLine *sl, Subroutine *sub);

	int runScript();

	byte getByte();
	int getNextWord();

	uint getNextVarContents();
	uint getVarWrapper();
	uint getVarOrWord();
	uint getVarOrByte();
	uint readVariable(uint variable);
	void writeNextVarContents(uint16 contents);
	void writeVariable(uint variable, uint16 contents);

	Item *derefItem(uint item);
	Item *getNextItemPtr();
	uint getNextItemID();
	uint getItem1ID() {return 1;}
	uint itemPtrToID(Item *id);
	Item *me();
	Item *actor();

	void showMessageFormat(const char *s, ...);
	const byte *getStringPtrByID(uint stringId);
	const byte *getLocalStringByID(uint stringId);
	uint getNextStringID();

	void addTimeEvent(uint timeout, uint subroutine_id);
	void delTimeEvent(TimeEvent *te);

	Item *findInByClass(Item *i, int16 m);
	Item *nextInByClass(Item *i, int16 m);
	Item *findMaster(int16 a, int16 n);
	Item *nextMaster(Item *item, int16 a, int16 n);
	int wordMatch(Item *item, int16 a, int16 n);

	bool isRoom(Item *item);
	bool isObject(Item *item);
	bool isPlayer(Item *item);

	void itemChildrenChanged(Item *item);
	void unlinkItem(Item *item);
	void linkItem(Item *item, Item *parent);

	void setItemParent(Item *item, Item *parent);
	void setItemState(Item *item, int value);

	void stopAnimate(uint a);
	void stopAnimateSimon2(uint a, uint b);

	void enableBox(uint hitarea);
	void disableBox(uint hitarea);
	void moveBox(uint hitarea, int x, int y);
	bool isBoxDead(uint hitarea);
	void undefineBox(uint hitarea);
	void defineBox(int id, int x, int y, int width, int height, int flags, int verb, Item *item_ptr);
	HitArea *findEmptyHitArea();

	void resetVerbs();
	void setVerb(HitArea * ha);
	void hitarea_leave(HitArea * ha, bool state = false);
	void leaveHitAreaById(uint hitarea_id);

	void sendSync(uint a);
	void waitForSync(uint a);

	uint getOffsetOfChild2Param(SubObject *child, uint prop);
	void scriptMouseOff();
	void freezeBottom();
	void unfreezeBottom();

	TextLocation *getTextLocation(uint a);

	uint setVerbText(HitArea *ha);
	void waitForInput();
	void setup_cond_c_helper();

	uint16 getBackExit(int n);
	uint16 getDoorState(Item *item, uint16 d);
	uint16 getExitOf(Item *item, uint16 d);
	void changeDoorState(SubRoom *r, uint16 d, uint16 n);
	void setDoorState(Item *i, uint16 d, uint16 n);

	// Elvira 1 specific
	Item *getDoorOf(Item *item, uint16 d);
	Item *getExitOf_e1(Item *item, uint16 d);
	void moveDirn_e1(Item *i, uint x);

	// Elvira 2 specific
	int changeExitStates(SubSuperRoom *sr, int n, int d, uint16 s);
	uint16 getExitState(Item *item, uint16 x, uint16 d);
	void setExitState(Item *i, uint16 n, uint16 d, uint16 s);
	void setSRExit(Item *i, int n, int d, uint16 s);
	void moveDirn_e2(Item *i, uint x);

	// Waxworks specific
	void moveDirn_ww(Item *i, uint x);

	int canPlace(Item *x, Item *y);
	int contains(Item *a, Item *b);
	int sizeContents(Item *x);
	int sizeOfRec(Item *o, int d);
	int sizeRec(Item *x, int d);
	int weighUp(Item *x);
	int weightRec(Item *x, int d);
	int weightOf(Item *x);
	void xPlace(Item *x, Item *y);

	void drawMenuStrip(uint windowNum, uint menuNum);
	void lightMenuStrip(int a);
	void unlightMenuStrip();
	void lightMenuBox(uint hitarea);

	uint menuFor_e2(Item *item);
	uint menuFor_ww(Item *item, uint id);
	void clearMenuStrip();
	void doMenuStrip(uint menuNum);

	void checkLinkBox();
 	void hyperLinkOn(uint16 x);
 	void hyperLinkOff();
	void linksUp();
	void linksDown();
	void oracleTextUp();
	void oracleTextDown();
	void listSaveGames(int n);
	void saveUserGame(int slot);
	void windowBackSpace(WindowBlock *window);

	void oracleLogo();
	void scrollOracle();
	void scrollOracleUp();
	void scrollOracleDown();
	void swapCharacterLogo();

	void mouseOff();
	void mouseOn();

	bool loadTablesIntoMem(uint subr_id);
	bool loadTablesOldIntoMem(uint subr_id);
	bool loadTablesNewIntoMem(uint subr_id);
	bool loadXTablesIntoMem(uint subr_id);
	void loadTextIntoMem(uint stringId);

	bool loadRoomItems(uint item);

	uint loadTextFile(const char *filename, byte *dst);
	Common::File *openTablesFile(const char *filename);
	void closeTablesFile(Common::File *in);

	uint loadTextFile_simon1(const char *filename, byte *dst);
	Common::File *openTablesFile_simon1(const char *filename);

	uint loadTextFile_gme(const char *filename, byte *dst);
	Common::File *openTablesFile_gme(const char *filename);

	void invokeTimeEvent(TimeEvent *te);
	bool kickoffTimeEvents();
	void killAllTimers();

	void endCutscene();
	void runSubroutine101();

	void checkUp(WindowBlock *window);
	void checkDown(WindowBlock *window);
	void inventoryUp(WindowBlock *window);
	void inventoryDown(WindowBlock *window);

	WindowBlock *openWindow(uint x, uint y, uint w, uint h, uint flags, uint fillColor, uint textColor);
	uint getWindowNum(WindowBlock *window);
	void clearWindow(WindowBlock *window);
	void changeWindow(uint a);
	void closeWindow(uint a);
	void setTextColor(uint color);
	void windowPutChar(WindowBlock *window, byte c, byte b = 0);
	void waitWindow(WindowBlock *window);

	HitArea *findBox(uint hitarea_id);
	void boxController(uint x, uint y, uint mode);
	void handleVerbClicked(uint verb);
	void clearName();
	void displayName(HitArea * ha);
	void resetNameWindow();
	void displayBoxStars();
	void invertBox_FF(HitArea *ha, bool state);
	void invertBox(HitArea * ha, byte a, byte b, byte c, byte d);

	void handleMouseMoved();
	void pollMouseXY();
	void initMouse();
	void loadMouseImage();
	void drawMousePointer();
	void drawMousePointer_FF();
	void drawMousePart(int image, byte x, byte y);

	void addArrows(WindowBlock *window);
	void removeArrows(WindowBlock *window, uint num);

	void drawIcon(WindowBlock *window, uint icon, uint x, uint y);
	bool hasIcon(Item *item);
	uint itemGetIconNumber(Item *item);
	uint setupIconHitArea(WindowBlock *window, uint num, uint x, uint y, Item *item_ptr);
	void drawIconArray(uint i, Item *item_ptr, int line, int classMask);
	void drawIconArray_FF(uint i, Item *item_ptr, int line, int classMask);
	void drawIconArray_Simon(uint i, Item *item_ptr, int line, int classMask);
	void removeIconArray(uint num);

	void loadIconData();	
	void loadIconFile();
	void loadMenuFile();

	bool processSpecialKeys();
	void hitarea_stuff_helper();

	void permitInput();

	uint getFeebleFontSize(byte chr);
	void justifyStart();
	void justifyOutPut(byte chr);

	void loadZone(uint zoneNum);

	void animate(uint windowNum, uint zoneNum, uint vgaSpriteId, uint x, uint y, uint palette, bool vgaScript = false);
	void setImage(uint16 vga_res_id, bool vgaScript = false);
	void setWindowImage(uint16 mode, uint16 vga_res_id);
	void setWindowImageEx(uint16 mode, uint16 vga_res);

	void playSpeech(uint speech_id, uint vga_sprite_id);
	void skipSpeech();

	bool printNameOf(Item *item, uint x, uint y);
	bool printTextOf(uint a, uint x, uint y);
	void printVerbOf(uint hitarea_id);
	void showActionString(const byte *string);

	void printScreenText(uint vga_sprite_id, uint color, const char *string_ptr, int16 x, int16 y, int16 width);
	void sendInteractText(uint16 num, const char *fmt, ...);
	void printInteractText(uint16 num, const char *string);

	void renderStringAmiga(uint vga_sprite_id, uint color, uint width, uint height, const char *txt);
	void renderString(uint vga_sprite_id, uint color, uint width, uint height, const char *txt);

	void boxTextMessage(const char *x);
	void boxTextMsg(const char *x);
	void printBox();
	uint16 getBoxSize();
	uint16 checkFit(char *Ptr, int width, int lines);

	void writeChar(WindowBlock *window, int x, int y, int offs, int val);

	byte *allocBlock(uint32 size);
	void checkNoOverWrite();
	void checkRunningAnims();
	void checkAnims(uint a);
	void checkZonePtrs();
	void setZoneBuffers();

	void runVgaScript();

public:
	bool getBitFlag(uint bit);
	void setBitFlag(uint bit, bool value);

	// Video Script Opcodes, Common
	void vc1_fadeOut();
	void vc2_call();
	void vc3_loadSprite();
	void vc4_fadeIn();
	void vc5_ifEqual();
	void vc6_ifObjectHere();
	void vc7_ifObjectNotHere();
	void vc8_ifObjectIsAt();
	void vc9_ifObjectStateIs();
	void vc10_draw();
	void vc12_delay();
	void vc13_addToSpriteX();
	void vc14_addToSpriteY();
	void vc15_sync();
	void vc16_waitSync();
	void vc18_jump();
	void vc19_loop();
	void vc20_setRepeat();
	void vc21_endRepeat();
	void vc23_setPriority();
	void vc24_setSpriteXY();
	void vc25_halt_sprite();
	void vc26_setSubWindow();
	void vc27_resetSprite();
	void vc28_playSFX();
	void vc29_stopAllSounds();
	void vc30_setFrameRate();
	void vc31_setWindow();
	void vc33_setMouseOn();
	void vc34_setMouseOff();
	void vc35_clearWindow();
	void vc36_setWindowImage();
	void vc38_ifVarNotZero();
	void vc39_setVar();
	void vc40();
	void vc41();
	void vc42_delayIfNotEQ();

	// Video Script Opcodes, Elvira 1
	void vc17_waitEnd();
	void vc22_setPaletteOld();
	void vc32_saveScreen();
	void vc37_pokePalette();

	// Video Script Opcodes, Elvira 2
	void vc43_ifBitSet();
	void vc44_ifBitClear();
	void vc45_setWindowPalette();
	void vc46_setPaletteSlot1();
	void vc47_setPaletteSlot2();
	void vc48_setPaletteSlot3();
	void vc49_setBit();
	void vc50_clearBit();
	void vc51_enableBox();
	void vc52_playSound();
	void vc53_dissolveIn();
	void vc54_dissolveOut();
	void vc55_moveBox();
	void vc56_fullScreen();
	void vc57_blackPalette();
	void vc58_checkCodeWheel();
	void vc58_changePriority();
	void vc59_ifEGA();

	// Video Script Opcodes, Waxworks
	void vc60_stopAnimation();
	void vc61();
	void vc62_fastFadeOut();
	void vc63_fastFadeIn();

	// Video Script Opcodes, Simon 1
	void vc11_clearPathFinder();
	void vc17_setPathfinderItem();
	void vc32_copyVar();
	void vc37_addToSpriteY();
	void vc45_setSpriteX();
	void vc46_setSpriteY();
	void vc47_addToVar();
	void vc48_setPathFinder();
	void vc59_ifSpeech();
	void vc61_setMaskImage();
	void vc22_setPaletteNew();

	// Video Script Opcodes, Simon 2
	void vc56_delayLong();
	void vc59_stopAnimations();
	void vc64_ifSpeech();
	void vc65_slowFadeIn();
	void vc66_ifEqual();
	void vc67_ifLE();
	void vc68_ifGE();
	void vc69_playSeq();
	void vc70_joinSeq();
	void vc71_ifSeqWaiting();
	void vc72_segue();
	void vc73_setMark();
	void vc74_clearMark();

	// Video Script Opcodes, Feeble Files
	void vc75_setScale();
	void vc76_setScaleXOffs();
	void vc77_setScaleYOffs();
	void vc78_computeXY();
	void vc79_computePosNum();
	void vc80_setOverlayImage();
	void vc81_setRandom();
	void vc82_getPathValue();
	void vc83_playSoundLoop();
	void vc84_stopSoundLoop();

	void setScriptCondition(bool cond);
	bool getScriptCondition();
	void setScriptReturn(int ret);
	int getScriptReturn();

	// Opcodes, common
	void o_at();
	void o_notAt();
	void o_carried();
	void o_notCarried();
	void o_isAt();
	void o_zero();
	void o_notZero();
	void o_eq();
	void o_notEq();
	void o_gt();
	void o_lt();
	void o_eqf();
	void o_notEqf();
	void o_ltf();
	void o_gtf();
	void o_chance();
	void o_isRoom();
	void o_isObject();
	void o_state();
	void o_oflag();
	void o_destroy();
	void o_place();
	void o_copyff();
	void o_clear();
	void o_let();
	void o_add();
	void o_sub();
	void o_addf();
	void o_subf();
	void o_mul();
	void o_div();
	void o_mulf();
	void o_divf();
	void o_mod();
	void o_modf();
	void o_random();
	void o_goto();
	void o_oset();
	void o_oclear();
	void o_putBy();
	void o_inc();
	void o_dec();
	void o_setState();
	void o_print();
	void o_message();
	void o_msg();
	void o_end();
	void o_done();
	void o_process();
	void o_when();
	void o_if1();
	void o_if2();
	void o_isCalled();
	void o_is();
	void o_debug();
	void o_comment();
	void o_haltAnimation();
	void o_restartAnimation();
	void o_getParent();
	void o_getNext();
	void o_getChildren();
	void o_picture();
	void o_loadZone();
	void o_killAnimate();
	void o_defWindow();
	void o_window();
	void o_cls();
	void o_closeWindow();
	void o_addBox();
	void o_delBox();
	void o_enableBox();
	void o_disableBox();
	void o_moveBox();
	void o_doIcons();
	void o_isClass();
	void o_setClass();
	void o_unsetClass();
	void o_waitSync();
	void o_sync();
	void o_defObj();
	void o_here();
	void o_doClassIcons();
	void o_setAdjNoun();
	void o_saveUserGame();
	void o_loadUserGame();
	void o_copysf();
	void o_restoreIcons();
	void o_freezeZones();
	void o_placeNoIcons();
	void o_clearTimers();
	void o_setDollar();
	void o_isBox();

	// Opcodes, Elvira 1
	void oe1_present();
	void oe1_notPresent();
	void oe1_worn();
	void oe1_notWorn();
	void oe1_notCarried();
	void oe1_isNotAt();
	void oe1_sibling();
	void oe1_notSibling();
	void oe1_isIn();
	void oe1_isNotIn();
	void oe1_isPlayer();
	void oe1_canPut();
	void oe1_create();
	void oe1_copyof();
	void oe1_copyfo();
	void oe1_whatO();
	void oe1_weigh();
	void oe1_setFF();
	void oe1_moveDirn();
	void oe1_score();
	void oe1_look();
	void oe1_doClass();
	void oe1_pObj();
	void oe1_pName();
	void oe1_pcName();
	void oe1_isCalled();
	void oe1_cFlag();
	void oe1_rescan();
	void oe1_setUserItem();
	void oe1_getUserItem();
	void oe1_whereTo();
	void oe1_doorExit();
	void oe1_saveGame();
	void oe1_loadGame();
	void oe1_clearUserItem();
	void oe1_findMaster();
	void oe1_nextMaster();
	void oe1_animate();
	void oe1_stopAnimate();
	void oe1_menu();
	void oe1_enableInput();
	void oe1_setTime();
	void oe1_ifTime();
	void oe1_playTune();
	void oe1_bitClear();
	void oe1_bitSet();
	void oe1_bitTest();
	void oe1_zoneDisk();
	void oe1_printStats();
	void oe1_stopTune();
	void oe1_printPlayerDamage();
	void oe1_printMonsterDamage();
	void oe1_pauseGame();
	void oe1_printPlayerHit();
	void oe1_printMonsterHit();

	int16 levelOf(Item *item); 
	int16 moreText(Item *i);
	void lobjFunc(Item *i, const char *f);
	uint confirmQuit();
	uint continueOrQuit();
	void printScroll();
	void synchChain(Item *i);

	// Opcodes, Elvira 2
	void oe2_moveDirn();
	void oe2_doClass();
	void oe2_pObj();
	void oe2_loadGame();
	void oe2_drawItem();
	void oe2_doTable();
	void oe2_pauseGame();
	void oe2_setDoorOpen();
	void oe2_setDoorClosed();
	void oe2_setDoorLocked();
	void oe2_ifDoorOpen();
	void oe2_ifDoorClosed();
	void oe2_ifDoorLocked();
	void oe2_storeItem();
	void oe2_getItem();
	void oe2_bSet();
	void oe2_bClear();
	void oe2_bZero();
	void oe2_bNotZero();
	void oe2_getOValue();
	void oe2_setOValue();
	void oe2_ink();
	void oe2_printStats();
	void oe2_setSuperRoom();
	void oe2_getSuperRoom();
	void oe2_setExitOpen();
	void oe2_setExitClosed();
	void oe2_setExitLocked();
	void oe2_ifExitOpen();
	void oe2_ifExitClosed();
	void oe2_ifExitLocked();
	void oe2_unk174();
	void oe2_getDollar2();
	void oe2_setSRExit();
	void oe2_unk177();
	void oe2_unk178();
	void oe2_isAdjNoun();
	void oe2_b2Set();
	void oe2_b2Clear();
	void oe2_b2Zero();
	void oe2_b2NotZero();

	// Opcodes, Waxworks
	void oww_moveDirn();
	void oww_goto();
	void oww_addTextBox();
	void oww_setShortText();
	void oww_setLongText();
	void oww_whereTo();
	void oww_menu();
	void oww_textMenu();
	void oww_pauseGame();
	void oww_boxMessage();
	void oww_boxMsg();
	void oww_boxLongText();
	void oww_printBox();
	void oww_boxPObj();
	void oww_lockZones();
	void oww_unlockZones();

	// Opcodes, Simon 1
	void oww_printLongText();
	void os1_animate();
	void os1_playTune();
	void os1_pauseGame();
	void os1_screenTextBox();
	void os1_screenTextMsg();
	void os1_playEffect();
	void os1_screenTextPObj();
	void os1_getPathPosn();
	void os1_scnTxtLongText();
	void os1_mouseOn();
	void os1_mouseOff();
	void os1_loadBeard();
	void os1_unloadBeard();
	void os1_unloadZone();
	void os1_loadStrings();
	void os1_unfreezeZones();
	void os1_specialFade();

	// Opcodes, Simon 2
	void os2_printLongText();
	void os2_rescan();
	void os2_animate();
	void os2_stopAnimate();
	void os2_playTune();
	void os2_screenTextPObj();
	void os2_mouseOn();
	void os2_mouseOff();
	void os2_isShortText();
	void os2_clearMarks();
	void os2_waitMark();

	// Opcodes, Feeble Files
	void off_chance();
	void off_jumpOut();
	void off_addTextBox();
	void off_printLongText();
	void off_addBox();
	void off_oracleTextDown();
	void off_oracleTextUp();
	void off_ifTime();
	void off_setTime();
	void off_saveUserGame();
	void off_loadUserGame();
	void off_listSaveGames();
	void off_checkCD();
	void off_screenTextBox();
	void off_isAdjNoun();
	void off_hyperLinkOn();
	void off_hyperLinkOff();
	void off_checkPaths();
	void off_screenTextPObj();
	void off_mouseOn();
	void off_mouseOff();
	void off_loadVideo();
	void off_playVideo();
	void off_centreScroll();
	void off_resetPVCount();
	void off_setPathValues();
	void off_stopClock();
	void off_restartClock();
	void off_setColour();
	void off_b3Set();
	void off_b3Clear();
	void off_b3Zero();
	void off_b3NotZero();

	// Opcodes, Puzzle Pack
	void opp_iconifyWindow();
	void opp_restoreOopsPosition();
	void opp_loadMouseImage();
	void opp_message();
	void opp_setShortText();
	void opp_loadHiScores();
	void opp_checkHiScores();
	void opp_sync();
	void opp_saveUserGame();
	void opp_loadUserGame();
	void opp_saveOopsPosition();
	void opp_resetGameTime();
	void opp_resetPVCount();
	void opp_setPathValues();
	void opp_restartClock();

protected:
	bool drawImages_clip(VC10_state *state);

	void drawImages(VC10_state *state);
	void drawImages_Amiga(VC10_state *state);
	void drawImages_Simon(VC10_state *state);
	void drawImages_Feeble(VC10_state *state);

	void scaleClip(int16 h, int16 w, int16 y, int16 x, int16 scrollY);
	void horizontalScroll(VC10_state *state);
	void verticalScroll(VC10_state *state);

	int vcReadVarOrWord();
	uint vcReadNextWord();
	uint vcReadNextByte();
	uint vcReadVar(uint var);
	void vcWriteVar(uint var, int16 value);
	void vcSkipNextInstruction();

	int getScale(int16 y, int16 x);
	void checkScrollX(int16 x, int16 xpos);
	void checkScrollY(int16 y, int16 ypos);
	void centreScroll();

	void clearWindow(uint windowNum, uint color);
	void setPaletteSlot(uint srcOffs, uint dstOffs);
	void checkWaitEndTable();

	void startOverlayAnims();
	void startAnOverlayAnim();

	bool itemIsSiblingOf(uint16 val);
	bool itemIsParentOf(uint16 a, uint16 b);
	bool vc_maybe_skip_proc_1(uint16 a, int16 b);

	bool isVgaQueueEmpty();
	void haltAnimation();
	void restartAnimation();
	void addVgaEvent(uint16 num, const byte *code_ptr, uint16 cur_sprite, uint16 curZoneNum);
	void deleteVgaEvent(VgaTimerEntry * vte);
	void processVgaEvents();
	void animateEvent(const byte *code_ptr, uint16 curZoneNum, uint16 cur_sprite);
	void scrollEvent();

	VgaSprite *findCurSprite();

	bool isSpriteLoaded(uint16 id, uint16 zoneNum);

	void resetWindow(WindowBlock *window);
	void freeBox(uint index);

	void windowPutChar(uint a);

	void restoreWindow(WindowBlock *window);
	void colorWindow(WindowBlock *window);

	void restoreBlock(uint h, uint w, uint y, uint x);

	byte *getFrontBuf();
	byte *getBackBuf();
	byte *getBackGround();
	byte *getScaleBuf();

	byte *convertImage(VC10_state *state, bool compressed);

	bool decrunchFile(byte *src, byte *dst, uint32 size);
	void loadVGABeardFile(uint id);
	void loadVGAVideoFile(uint id, uint type);
	bool loadVGASoundFile(uint id, uint type);

	int init();
	int go();

	void openGameFile();
	void readGameFile(void *dst, uint32 offs, uint32 size);

	void timer_callback();
	void timer_proc1();

	void animateSprites();
	void animateSpritesDebug();
	void animateSpritesByY();

	void clearSurfaces(uint num_lines);
	void updateScreen();

	void dumpVideoScript(const byte *src, bool one_opcode_only);
	void dumpVgaFile(const byte *vga);
	void dumpVgaScript(const byte *ptr, uint res, uint sprite_id);
	void dumpVgaScriptAlways(const byte *ptr, uint res, uint sprite_id);
	void dumpVgaBitmaps(const byte *vga, byte *vga1, int res);
	void dumpSingleBitmap(int file, int image, const byte *offs, int w, int h, byte base);
	void dumpBitmap(const char *filename, const byte *offs, int w, int h, int flags, const byte *palette, byte base);

	void clearBackFromTop(uint lines);
	void fillFrontFromBack(uint x, uint y, uint w, uint h);
	void fillBackGroundFromBack(uint lines);
	void fillBackFromFront(uint x, uint y, uint w, uint h);

	void print_char_helper_1(const byte *src, uint len);
	void clsCheck(WindowBlock *window);

	void quickLoadOrSave();
	void shutdown();

	byte *vc10_uncompressFlip(const byte *src, uint w, uint h);
	byte *vc10_flip(const byte *src, uint w, uint h);

	Item *getNextItemPtrStrange();

	bool loadGame_e1(const char *filename, bool restartMode = false);
	bool saveGame_e1(const char *filename);

	bool loadGame(const char *filename, bool restartMode = false);
	bool saveGame(uint slot, const char *caption);

	void openTextWindow();
	void tidyIconArray(uint i);

	void windowNewLine(WindowBlock *window);
	void windowDrawChar(WindowBlock *window, uint x, uint y, byte chr);

	void loadMusic(uint music);
	void loadModule(uint music);

	void checkTimerCallback();
	void delay(uint delay);
	void pause();

	void waitForMark(uint i);
	void scrollScreen();

	void decodeColumn(byte *dst, const byte *src, int height);
	void decodeRow(byte *dst, const byte *src, int width);
	void hitarea_stuff_helper_2();
	void fastFadeIn();
	void slowFadeIn();

	void vcStopAnimation(uint file, uint sprite);

	void userGame(bool load);
	void disableFileBoxes();
	int userGameGetKey(bool *b, char *buf);
	void userGameBackSpace(WindowBlock *window, int x, byte b = 0);
	void listSaveGames(char *buf);
	void fileError(WindowBlock *window, bool save_error);

	int countSaveGames();
	int displaySaveGameList(int curpos, bool load, char *dst);

	char *genSaveName(int slot);
};

} // End of namespace AGOS

#endif