aboutsummaryrefslogtreecommitdiff
path: root/engines/kyra/kyra_v1.h
blob: e73a8b77b72891de78f9df4a5d090da134f25bb6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
/* 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 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 KYRA_KYRA_V1_H
#define KYRA_KYRA_V1_H

#include "engines/engine.h"

#include "common/array.h"
#include "common/events.h"
#include "common/system.h"

#include "sound/mixer.h"

#include "kyra/script.h"

namespace Common {
class SeekableReadStream;
class WriteStream;
} // End of namespace Common

class KyraMetaEngine;

/**
 * This is the namespace of the Kyra engine.
 *
 * Status of this engine:
 *
 * The KYRA engine supports all three Kyrandia games by Westwood. It also supports Westwood's
 * Lands of Lore. There are various platform ports of the different games, almost all of them are
 * fully supported. Only the Macintosh port of Kyrandia 1 makes a difference here, which lacks
 * support for sound effects and music.
 *
 * The different translations of the games are mostly supported, since every translation
 * requires some work for kyra.dat for example, it is almost impossible to support translations,
 * without owning them. There a currently a few reported unsupported translations:
 *
 * - Official translations
 * None known.
 * - Probably official translations (currently no sources are known to verify this)
 * Kyrandia 2 Spanish (feature request #2499966 "KYRA2: Add support for Spanish floppy version")
 * - Doubtful official translations (no sources here either, but less likely to be official)
 * Kyrandia 1 Korean (feature request #1758252 "KYRA1: Add support for Korean/DOS version")
 * Kyrandia 2 Polish (feature request #2146192 "KYRA2: Add support for Polish floppy version")
 * - Fan translations:
 * Kyrandia 1 Russian (no feature request)
 * Kyrandia 2 Russian (no feature request)
 * Kyrandia 3 Russian (feature request #2812792 "Kyrandia3 Russian")
 * 
 * The primary maintainer for the engine is LordHoto, although some parts are maintained by _athrxx.
 * If you have questions about parts of the code, the following rough description might help in
 * determining who you should ask:
 * _athrxx is the maintainer for the Lands of Lore subengine, he also maintains most of the FM-TOWNS
 * and PC98 specific code (especially the sound code, also some ingame code) and the Kyrandia 2
 * sequence player code.
 * LordHoto is responsible for the rest of the codebase, he also worked on the graphics output for 16
 * color PC98 games.
 *
 * Other people who worked on this engine include cyx, who initially started to work on Kyrandia 1
 * support, vinterstum, who did various things for Kyrandia 1 and started to work on the Kyrandia 2
 * sequence player code and also on the TIM script code, and eriktorbjorn, who helped out naming
 * our AdLib player code and also contributed a work around for a music bug in the "Pool of Sorrow"
 * scene of Kyrandia 1, which is also present in the original. All three mentioned developers are
 * not actively working on KYRA anymore.
 *
 * The engine is mostly finished code wise. A possible remaining task is proper refactoring,
 * which might help in reducing binary size and along with it runtime memory use, but of course
 * might lead to regressions (since the current code makes no problems on our low end ports, it
 * is pretty minor priority though, since the benefit would be mostly nicer code). The biggest
 * task left is the kyra.dat handling, which is currently being revised by LordHoto.
 *
 * Supported games:
 * - The Legend of Kyrandia (fully supported, except for Macintosh port, which lacks sound)
 * - (The) Hand of Fate (fully supported)
 * - Malcolm's Revenge (fully supported)
 * - Lands of Lore: The Throne of Chaos (completable, still work in progress)
 */
namespace Kyra {

struct GameFlags {
	Common::Language lang;

	// language overwrites of fan translations (only needed for multilingual games)
	Common::Language fanLang;
	Common::Language replacedLang;

	Common::Platform platform;

	bool isDemo               : 1;
	bool useAltShapeHeader    : 1;    // alternative shape header (uses 2 bytes more, those are unused though)
	bool isTalkie             : 1;
	bool useHiResOverlay      : 1;
	bool use16ColorMode       : 1;
	bool useDigSound          : 1;
	bool useInstallerPackage  : 1;

	byte gameID;
};

enum {
	GI_KYRA1 = 0,
	GI_KYRA2 = 1,
	GI_KYRA3 = 2,
	GI_LOL = 4
};

struct AudioDataStruct {
	const char *const *fileList;
	int fileListLen;
	const void *cdaTracks;
	int cdaNumTracks;
	int extraOffset;
};

// TODO: this is just the start of makeing the debug output of the kyra engine a bit more useable
// in the future we maybe merge some flags  and/or create new ones
enum DebugLevels {
	kDebugLevelScriptFuncs = 1 <<  0, ///< debug level for o#_* functions
	kDebugLevelScript      = 1 <<  1, ///< debug level for "EMCInterpreter" functions
	kDebugLevelSprites     = 1 <<  2, ///< debug level for "Sprites" functions
	kDebugLevelScreen      = 1 <<  3, ///< debug level for "Screen" functions
	kDebugLevelSound       = 1 <<  4, ///< debug level for "Sound" functions
	kDebugLevelAnimator    = 1 <<  5, ///< debug level for "ScreenAnimator" functions
	kDebugLevelMain        = 1 <<  6, ///< debug level for common "KyraEngine(_v#)" functions && "TextDisplayer" functions
	kDebugLevelGUI         = 1 <<  7, ///< debug level for "KyraEngine*" gui functions
	kDebugLevelSequence    = 1 <<  8, ///< debug level for "SeqPlayer" functions
	kDebugLevelMovie       = 1 <<  9, ///< debug level for movie specific funtions
	kDebugLevelTimer       = 1 << 10  ///< debug level for "TimerManager" functions
};

enum MusicDataID {
	kMusicIntro = 0,
	kMusicIngame,
	kMusicFinale
};

class Screen;
class Resource;
class Sound;
class Movie;
class TextDisplayer;
class StaticResource;
class TimerManager;
class Debugger;
class GUI;

struct Button;

class KyraEngine_v1 : public Engine {
friend class Debugger;
friend class ::KyraMetaEngine;
friend class GUI;
friend class SoundMidiPC;    // For _eventMan
public:
	KyraEngine_v1(OSystem *system, const GameFlags &flags);
	virtual ~KyraEngine_v1();

	uint8 game() const { return _flags.gameID; }
	const GameFlags &gameFlags() const { return _flags; }

	// access to Kyra specific functionallity
	Resource *resource() { return _res; }
	virtual Screen *screen() = 0;
	virtual TextDisplayer *text() { return _text; }
	virtual GUI *gui() const { return 0; }
	Sound *sound() { return _sound; }
	StaticResource *staticres() { return _staticres; }
	TimerManager *timer() { return _timer; }

	uint32 tickLength() const { return _tickLength; }

	Common::RandomSource _rnd;

	// input
	void setMousePos(int x, int y);
	Common::Point getMousePos() const;

	// config specific
	bool speechEnabled();
	bool textEnabled();

	enum kVolumeEntry {
		kVolumeMusic = 0,
		kVolumeSfx = 1,
		kVolumeSpeech = 2
	};

	// volume reaches per default from 2 to 97
	void setVolume(kVolumeEntry vol, uint8 value);
	uint8 getVolume(kVolumeEntry vol);

	virtual void syncSoundSettings();

	// game flag handling
	int setGameFlag(int flag);
	int queryGameFlag(int flag) const;
	int resetGameFlag(int flag);

	// sound
	virtual void snd_playTheme(int file, int track);
	virtual void snd_playSoundEffect(int id, int volume=0xFF);
	virtual void snd_playWanderScoreViaMap(int command, int restart);
	virtual void snd_playVoiceFile(int id) = 0;
	virtual bool snd_voiceIsPlaying();
	virtual void snd_stopVoice();

	// delay functionallity
	virtual void delayUntil(uint32 timestamp, bool updateGameTimers = false, bool update = false, bool isMainLoop = false);
	virtual void delay(uint32 millis, bool update = false, bool isMainLoop = false);
	virtual void delayWithTicks(int ticks);

protected:
	// Engine APIs
	virtual Common::Error init();
	virtual Common::Error go() = 0;

	virtual Common::Error run() {
		Common::Error err;
		registerDefaultSettings();
		err = init();
		if (err != Common::kNoError)
			return err;
		return go();
	}

	virtual ::GUI::Debugger *getDebugger();
	virtual bool hasFeature(EngineFeature f) const;
	virtual void pauseEngineIntern(bool pause);

	// intern
	Resource *_res;
	Sound *_sound;
	TextDisplayer *_text;
	StaticResource *_staticres;
	TimerManager *_timer;
	EMCInterpreter *_emc;
	Debugger *_debugger;

	// input
	void setupKeyMap();
	void updateInput();
	int checkInput(Button *buttonList, bool mainLoop = false, int eventFlag = 0x8000);
	void removeInputTop();

	int _mouseX, _mouseY;

	struct Event {
		Common::Event event;
		bool causedSkip;

		Event() : event(), causedSkip(false) {}
		Event(Common::Event e) : event(e), causedSkip(false) {}
		Event(Common::Event e, bool skip) : event(e), causedSkip(skip) {}

		operator Common::Event() const { return event; }
	};
	Common::List<Event> _eventList;
	typedef Common::HashMap<int, int16> KeyMap;
	KeyMap _keyMap;

	// config specific
	virtual void registerDefaultSettings();
	virtual void readSettings();
	virtual void writeSettings();

	uint8 _configWalkspeed;

	int _configMusic;
	bool _configSounds;
	uint8 _configVoice;

	// game speed
	virtual bool skipFlag() const;
	virtual void resetSkipFlag(bool removeEvent = true);

	uint16 _tickLength;
	uint16 _gameSpeed;

	// run
	int8 _deathHandler;

	// timer
	virtual void setupTimers() = 0;

	virtual void setWalkspeed(uint8 speed) = 0;

	// detection
	GameFlags _flags;

	// opcode
	virtual void setupOpcodeTable() = 0;
	Common::Array<const Opcode*> _opcodes;

	int o1_queryGameFlag(EMCState *script);
	int o1_setGameFlag(EMCState *script);
	int o1_resetGameFlag(EMCState *script);
	int o1_getRand(EMCState *script);
	int o1_hideMouse(EMCState *script);
	int o1_showMouse(EMCState *script);
	int o1_setMousePos(EMCState *script);
	int o1_setHandItem(EMCState *script);
	int o1_removeHandItem(EMCState *script);
	int o1_getMouseState(EMCState *script);
	int o1_setDeathHandler(EMCState *script);
	int o1_playWanderScoreViaMap(EMCState *script);
	int o1_fillRect(EMCState *script);
	int o1_blockInWalkableRegion(EMCState *script);
	int o1_blockOutWalkableRegion(EMCState *script);
	int o1_playSoundEffect(EMCState *script);

	// items
	int _mouseState;

	virtual void setHandItem(uint16 item) = 0;
	virtual void removeHandItem() = 0;

	// game flags
	uint8 _flagsTable[100]; // TODO: check this value

	// sound
	Audio::SoundHandle _speechHandle;

	int _curMusicTheme;
	int _curSfxFile;
	int16 _lastMusicCommand;

	const int8 *_trackMap;
	int _trackMapSize;

	virtual int convertVolumeToMixer(int value);
	virtual int convertVolumeFromMixer(int value);

	// pathfinder
	virtual int findWay(int x, int y, int toX, int toY, int *moveTable, int moveTableSize);
	int findSubPath(int x, int y, int toX, int toY, int *moveTable, int start, int end);
	int getFacingFromPointToPoint(int x, int y, int toX, int toY);
	int getOppositeFacingDirection(int dir);
	void changePosTowardsFacing(int &x, int &y, int facing);
	int getMoveTableSize(int *moveTable);
	virtual bool lineIsPassable(int x, int y) = 0;

	static const int8 _addXPosTable[];
	static const int8 _addYPosTable[];

	// Character

	static const int8 _charAddXPosTable[];
	static const int8 _charAddYPosTable[];

	// save/load
	int _gameToLoad;

	uint32 _lastAutosave;
	void checkAutosave();

	bool _isSaveAllowed;

	bool canLoadGameStateCurrently() { return _isSaveAllowed; }
	bool canSaveGameStateCurrently() { return _isSaveAllowed; }

	const char *getSavegameFilename(int num);
	static Common::String getSavegameFilename(const Common::String &target, int num);
	bool saveFileLoadable(int slot);

	struct SaveHeader {
		Common::String description;
		uint32 version;
		byte gameID;
		uint32 flags;

		bool originalSave;  // savegame from original interpreter
		bool oldHeader;     // old scummvm save header

		Graphics::Surface *thumbnail;
	};

	enum kReadSaveHeaderError {
		kRSHENoError = 0,
		kRSHEInvalidType = 1,
		kRSHEInvalidVersion = 2,
		kRSHEIoError = 3
	};

	static kReadSaveHeaderError readSaveHeader(Common::SeekableReadStream *file, bool loadThumbnail, SaveHeader &header);

	void loadGameStateCheck(int slot);
	virtual Common::Error loadGameState(int slot) = 0;
	Common::Error saveGameState(int slot, const char *saveName) { return saveGameState(slot, saveName, 0); }
	virtual Common::Error saveGameState(int slot, const char *saveName, const Graphics::Surface *thumbnail) = 0;

	Common::SeekableReadStream *openSaveForReading(const char *filename, SaveHeader &header);
	Common::WriteStream *openSaveForWriting(const char *filename, const char *saveName, const Graphics::Surface *thumbnail) const;

	// TODO: Consider moving this to Screen
	virtual Graphics::Surface *generateSaveThumbnail() const { return 0; }
};

} // End of namespace Kyra

#endif