aboutsummaryrefslogtreecommitdiff
path: root/engines/agi/agi.cpp
blob: c7b45871b7ec26a420d211e05d2f93446dbcd402 (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
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
/* 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.
 *
 * $URL$
 * $Id$
 *
 */

#include "common/md5.h"
#include "common/events.h"
#include "common/EventRecorder.h"
#include "common/file.h"
#include "common/savefile.h"
#include "common/config-manager.h"
#include "common/random.h"

#include "base/plugins.h"
#include "base/version.h"

#include "graphics/cursorman.h"

#include "sound/mididrv.h"
#include "sound/mixer.h"

#include "agi/agi.h"
#include "agi/graphics.h"
#include "agi/sprite.h"
#include "agi/keyboard.h"
#include "agi/menu.h"

namespace Agi {

void AgiEngine::allowSynthetic(bool allow) {
	_allowSynthetic = allow;
}

void AgiEngine::processEvents() {
	Common::Event event;
	int key = 0;

	while (_eventMan->pollEvent(event)) {
		switch (event.type) {
		case Common::EVENT_PREDICTIVE_DIALOG:
			if (_predictiveDialogRunning)
				break;
			if (predictiveDialog()) {
				if (_game.inputMode == INPUT_NORMAL) {
					strcpy((char *)_game.inputBuffer, _predictiveResult);
					handleKeys(KEY_ENTER);
				} else if (_game.inputMode == INPUT_GETSTRING) {
					strcpy(_game.strings[_stringdata.str], _predictiveResult);
					newInputMode(INPUT_NORMAL);
					_gfx->printCharacter(_stringdata.x + strlen(_game.strings[_stringdata.str]) + 1,
							_stringdata.y, ' ', _game.colorFg, _game.colorBg);
				} else if (_game.inputMode == INPUT_NONE) {
					for (int n = 0; _predictiveResult[n]; n++)
						keyEnqueue(_predictiveResult[n]);
				}
			}
			break;
		case Common::EVENT_LBUTTONDOWN:
			key = BUTTON_LEFT;
			_mouse.button = kAgiMouseButtonLeft;
			keyEnqueue(key);
			_mouse.x = event.mouse.x;
			_mouse.y = event.mouse.y;
			break;
		case Common::EVENT_RBUTTONDOWN:
			key = BUTTON_RIGHT;
			_mouse.button = kAgiMouseButtonRight;
			keyEnqueue(key);
			_mouse.x = event.mouse.x;
			_mouse.y = event.mouse.y;
			break;
		case Common::EVENT_WHEELUP:
			key = WHEEL_UP;
			keyEnqueue(key);
			break;
		case Common::EVENT_WHEELDOWN:
			key = WHEEL_DOWN;
			keyEnqueue(key);
			break;
		case Common::EVENT_MOUSEMOVE:
			_mouse.x = event.mouse.x;
			_mouse.y = event.mouse.y;

			if (!_game.mouseFence.isEmpty()) {
				if (_mouse.x < _game.mouseFence.left)
					_mouse.x = _game.mouseFence.left;
				if (_mouse.x > _game.mouseFence.right)
					_mouse.x = _game.mouseFence.right;
				if (_mouse.y < _game.mouseFence.top)
					_mouse.y = _game.mouseFence.top;
				if (_mouse.y > _game.mouseFence.bottom)
					_mouse.y = _game.mouseFence.bottom;

				g_system->warpMouse(_mouse.x, _mouse.y);
			}

			break;
		case Common::EVENT_LBUTTONUP:
		case Common::EVENT_RBUTTONUP:
			_mouse.button = kAgiMouseButtonUp;
			_mouse.x = event.mouse.x;
			_mouse.y = event.mouse.y;
			break;
		case Common::EVENT_KEYDOWN:
			if (event.kbd.hasFlags(Common::KBD_CTRL) && event.kbd.keycode == Common::KEYCODE_d) {
				_console->attach();
				break;
			}

			switch (key = event.kbd.keycode) {
			case Common::KEYCODE_LEFT:
			case Common::KEYCODE_KP4:
				if (_allowSynthetic || !event.synthetic)
					key = KEY_LEFT;
				break;
			case Common::KEYCODE_RIGHT:
			case Common::KEYCODE_KP6:
				if (_allowSynthetic || !event.synthetic)
					key = KEY_RIGHT;
				break;
			case Common::KEYCODE_UP:
			case Common::KEYCODE_KP8:
				if (_allowSynthetic || !event.synthetic)
					key = KEY_UP;
				break;
			case Common::KEYCODE_DOWN:
			case Common::KEYCODE_KP2:
				if (_allowSynthetic || !event.synthetic)
					key = KEY_DOWN;
				break;
			case Common::KEYCODE_PAGEUP:
			case Common::KEYCODE_KP9:
				if (_allowSynthetic || !event.synthetic)
					key = KEY_UP_RIGHT;
				break;
			case Common::KEYCODE_PAGEDOWN:
			case Common::KEYCODE_KP3:
				if (_allowSynthetic || !event.synthetic)
					key = KEY_DOWN_RIGHT;
				break;
			case Common::KEYCODE_HOME:
			case Common::KEYCODE_KP7:
				if (_allowSynthetic || !event.synthetic)
					key = KEY_UP_LEFT;
				break;
			case Common::KEYCODE_END:
			case Common::KEYCODE_KP1:
				if (_allowSynthetic || !event.synthetic)
					key = KEY_DOWN_LEFT;
				break;
			case Common::KEYCODE_KP5:
				key = KEY_STATIONARY;
				break;
			case Common::KEYCODE_PLUS:
				key = '+';
				break;
			case Common::KEYCODE_MINUS:
				key = '-';
				break;
			case Common::KEYCODE_TAB:
				key = 0x0009;
				break;
			case Common::KEYCODE_F1:
				key = 0x3b00;
				break;
			case Common::KEYCODE_F2:
				key = 0x3c00;
				break;
			case Common::KEYCODE_F3:
				key = 0x3d00;
				break;
			case Common::KEYCODE_F4:
				key = 0x3e00;
				break;
			case Common::KEYCODE_F5:
				key = 0x3f00;
				break;
			case Common::KEYCODE_F6:
				key = 0x4000;
				break;
			case Common::KEYCODE_F7:
				key = 0x4100;
				break;
			case Common::KEYCODE_F8:
				key = 0x4200;
				break;
			case Common::KEYCODE_F9:
				key = 0x4300;
				break;
			case Common::KEYCODE_F10:
				key = 0x4400;
				break;
			case Common::KEYCODE_F11:
				key = KEY_STATUSLN;
				break;
			case Common::KEYCODE_F12:
				key = KEY_PRIORITY;
				break;
			case Common::KEYCODE_ESCAPE:
				key = 0x1b;
				break;
			case Common::KEYCODE_RETURN:
			case Common::KEYCODE_KP_ENTER:
				key = KEY_ENTER;
				break;
			case Common::KEYCODE_BACKSPACE:
				key = KEY_BACKSPACE;
				break;
			default:
				// Not a special key, so get the ASCII code for it
				key = event.kbd.ascii;

				// Function isalpha is defined in <ctype.h> so the following applies to it:
				//
				// The C Programming Language Standard states:
				//   The header <ctype.h> declares several functions useful for classifying
				//   and mapping characters. In all cases the argument is an int, the value
				//   of which shall be representable as an unsigned char or shall equal the
				//   value of the macro EOF. If the argument has any other value, the
				//   behavior is undefined.
				//
				// For a concrete example (e.g. in Microsoft Visual Studio 2003):
				//   When used with a debug CRT library, isalpha will display a CRT assert
				//   if passed a parameter that isn't EOF or in the range of 0 through 0xFF.
				if (key >= 0 && key <= 0xFF && isalpha(key)) {
					// Key is A-Z.
					// Map Ctrl-A to 1, Ctrl-B to 2, etc.
					if (event.kbd.flags & Common::KBD_CTRL) {
						key = toupper(key) - 'A' + 1;
					} else if (event.kbd.flags & Common::KBD_ALT) {
						// Map Alt-A, Alt-B etc. to special scancode values according to an internal scancode table.
						key = scancodeTable[toupper(key) - 'A'] << 8;
					}
				}
				break;
			}
			if (key)
				keyEnqueue(key);
			break;

		case Common::EVENT_KEYUP:
			if (_egoHoldKey)
				_game.viewTable[0].direction = 0;

		default:
			break;
		}
	}
}

void AgiEngine::pollTimer() {
	static uint32 m = 0;
	uint32 dm;

	if (_tickTimer < m)
		m = 0;

	while ((dm = _tickTimer - m) < 5) {
		processEvents();
		if (_console->isAttached())
			_console->onFrame();
		_system->delayMillis(10);
		_system->updateScreen();
	}
	m = _tickTimer;
}

void AgiEngine::agiTimerFunctionLow(void *refCon) {
	AgiEngine *self = (AgiEngine *)refCon;
	self->_tickTimer++;
}

void AgiEngine::pause(uint32 msec) {
	uint32 endTime = _system->getMillis() + msec;

	_gfx->setCursor(_renderMode == Common::kRenderAmiga, true);

	while (_system->getMillis() < endTime) {
		processEvents();
		_system->updateScreen();
		_system->delayMillis(10);
	}
	_gfx->setCursor(_renderMode == Common::kRenderAmiga);
}

void AgiEngine::initPriTable() {
	int i, p, y = 0;

	for (p = 1; p < 15; p++) {
		for (i = 0; i < 12; i++) {
			_game.priTable[y++] = p < 4 ? 4 : p;
		}
	}
}

int AgiEngine::agiInit() {
	int ec, i;

	debug(2, "initializing");
	debug(2, "game version = 0x%x", getVersion());

	// initialize with adj.ego.move.to.x.y(0, 0) so to speak
	_game.adjMouseX = _game.adjMouseY = 0;

	// reset all flags to false and all variables to 0
	for (i = 0; i < MAX_FLAGS; i++)
		_game.flags[i] = 0;
	for (i = 0; i < MAX_VARS; i++)
		_game.vars[i] = 0;

	// clear all resources and events
	for (i = 0; i < MAX_DIRS; i++) {
		memset(&_game.views[i], 0, sizeof(struct AgiView));
		memset(&_game.pictures[i], 0, sizeof(struct AgiPicture));
		memset(&_game.logics[i], 0, sizeof(struct AgiLogic));
		memset(&_game.sounds[i], 0, sizeof(class AgiSound *)); // _game.sounds contains pointers now
		memset(&_game.dirView[i], 0, sizeof(struct AgiDir));
		memset(&_game.dirPic[i], 0, sizeof(struct AgiDir));
		memset(&_game.dirLogic[i], 0, sizeof(struct AgiDir));
		memset(&_game.dirSound[i], 0, sizeof(struct AgiDir));
	}

	// clear view table
	for (i = 0; i < MAX_VIEWTABLE; i++)
		memset(&_game.viewTable[i], 0, sizeof(VtEntry));

	initWords();

	if (!_menu)
		_menu = new Menu(this, _gfx, _picture);

	initPriTable();

	// clear string buffer
	for (i = 0; i < MAX_STRINGS; i++)
		_game.strings[i][0] = 0;

	// setup emulation

	switch (getVersion() >> 12) {
	case 2:
		report("Emulating Sierra AGI v%x.%03x\n",
				(int)(getVersion() >> 12) & 0xF,
				(int)(getVersion()) & 0xFFF);
		break;
	case 3:
		report("Emulating Sierra AGI v%x.002.%03x\n",
				(int)(getVersion() >> 12) & 0xF,
				(int)(getVersion()) & 0xFFF);
		break;
	}

	if (getPlatform() == Common::kPlatformAmiga)
		_game.gameFlags |= ID_AMIGA;

	if (getFeatures() & GF_AGDS)
		_game.gameFlags |= ID_AGDS;

	// Make the 256 color AGI screen the default AGI screen when AGI256 or AGI256-2 is used
	if (getFeatures() & (GF_AGI256 | GF_AGI256_2))
		_game.sbuf = _game.sbuf256c;

	if (_game.gameFlags & ID_AMIGA)
		report("Amiga padded game detected.\n");

	if (_game.gameFlags & ID_AGDS)
		report("AGDS mode enabled.\n");

	ec = _loader->init();	// load vol files, etc

	if (ec == errOK)
		ec = _loader->loadObjects(OBJECTS);

	// note: demogs has no words.tok
	if (ec == errOK)
		ec = _loader->loadWords(WORDS);

	// FIXME: load IIgs instruments and samples
	// load_instruments("kq.sys16");

	// Load logic 0 into memory
	if (ec == errOK)
		ec = _loader->loadResource(rLOGIC, 0);

#ifdef __DS__
	// Normally, the engine loads the predictive text dictionary when the predictive dialog
	// is shown.  On the DS version, the word completion feature needs the dictionary too.
	loadDict();
#endif

	_egoHoldKey = false;

	_game.mouseFence.setWidth(0); // Reset

	return ec;
}

/*
 * Public functions
 */

void AgiEngine::agiUnloadResources() {
	int i;

	// Make sure logic 0 is always loaded
	for (i = 1; i < MAX_DIRS; i++) {
		_loader->unloadResource(rLOGIC, i);
	}
	for (i = 0; i < MAX_DIRS; i++) {
		_loader->unloadResource(rVIEW, i);
		_loader->unloadResource(rPICTURE, i);
		_loader->unloadResource(rSOUND, i);
	}
}

int AgiEngine::agiDeinit() {
	int ec;

	cleanInput();		// remove all words from memory
	agiUnloadResources();	// unload resources in memory
	_loader->unloadResource(rLOGIC, 0);
	ec = _loader->deinit();
	unloadObjects();
	unloadWords();

	clearImageStack();

	return ec;
}

int AgiEngine::agiLoadResource(int r, int n) {
	int i;

	i = _loader->loadResource(r, n);

	// WORKAROUND: Patches broken picture 147 in a corrupted Amiga version of Gold Rush! (v2.05 1989-03-09).
	// The picture can be seen in room 147 after dropping through the outhouse's hole in room 146.
	if (i == errOK && getGameID() == GID_GOLDRUSH && r == rPICTURE && n == 147 && _game.dirPic[n].len == 1982) {
		uint8 *pic = _game.pictures[n].rdata;
		Common::MemoryReadStream picStream(pic, _game.dirPic[n].len);
		char md5str[32+1];
		Common::md5_file_string(picStream, md5str, _game.dirPic[n].len);
		if (scumm_stricmp(md5str, "1c685eb048656cedcee4eb6eca2cecea") == 0) {
			pic[0x042] = 0x4B; // 0x49 -> 0x4B
			pic[0x043] = 0x66; // 0x26 -> 0x66
			pic[0x204] = 0x68; // 0x28 -> 0x68
			pic[0x6C0] = 0x2D; // 0x25 -> 0x2D
			pic[0x6F0] = 0xF0; // 0x70 -> 0xF0
			pic[0x734] = 0x6F; // 0x2F -> 0x6F
		}
	}

	return i;
}

int AgiEngine::agiUnloadResource(int r, int n) {
	return _loader->unloadResource(r, n);
}

struct GameSettings {
	const char *gameid;
	const char *description;
	byte id;
	uint32 features;
	const char *detectname;
};

static const GameSettings agiSettings[] = {
	{"agi", "AGI game", GID_AGI, MDT_ADLIB, "OBJECT"},
	{NULL, NULL, 0, 0, NULL}
};

AgiBase::AgiBase(OSystem *syst, const AGIGameDescription *gameDesc) : Engine(syst), _gameDescription(gameDesc) {
	_noSaveLoadAllowed = false;

	initFeatures();
	initVersion();
}

AgiEngine::AgiEngine(OSystem *syst, const AGIGameDescription *gameDesc) : AgiBase(syst, gameDesc) {

	// Setup mixer
	_mixer->setVolumeForSoundType(Audio::Mixer::kSFXSoundType, ConfMan.getInt("sfx_volume"));
	_mixer->setVolumeForSoundType(Audio::Mixer::kMusicSoundType, ConfMan.getInt("music_volume"));

	const GameSettings *g;

	const char *gameid = ConfMan.get("gameid").c_str();
	for (g = agiSettings; g->gameid; ++g)
		if (!scumm_stricmp(g->gameid, gameid))
			_gameId = g->id;

	parseFeatures();

	_rnd = new Common::RandomSource();
	g_eventRec.registerRandomSource(*_rnd, "agi");

	Common::addDebugChannel(kDebugLevelMain, "Main", "Generic debug level");
	Common::addDebugChannel(kDebugLevelResources, "Resources", "Resources debugging");
	Common::addDebugChannel(kDebugLevelSprites, "Sprites", "Sprites debugging");
	Common::addDebugChannel(kDebugLevelInventory, "Inventory", "Inventory debugging");
	Common::addDebugChannel(kDebugLevelInput, "Input", "Input events debugging");
	Common::addDebugChannel(kDebugLevelMenu, "Menu", "Menu debugging");
	Common::addDebugChannel(kDebugLevelScripts, "Scripts", "Scripts debugging");
	Common::addDebugChannel(kDebugLevelSound, "Sound", "Sound debugging");
	Common::addDebugChannel(kDebugLevelText, "Text", "Text output debugging");
	Common::addDebugChannel(kDebugLevelSavegame, "Savegame", "Saving & restoring game debugging");


	memset(&_game, 0, sizeof(struct AgiGame));
	memset(&_debug, 0, sizeof(struct AgiDebug));
	memset(&_mouse, 0, sizeof(struct Mouse));

	_game.clockEnabled = false;
	_game.state = STATE_INIT;

	_keyQueueStart = 0;
	_keyQueueEnd = 0;

	_allowSynthetic = false;

	_tickTimer = 0;

	_intobj = NULL;

	_menu = NULL;
	_menuSelected = false;

	_lastSentence[0] = 0;
	memset(&_stringdata, 0, sizeof(struct StringData));

	_objects = NULL;

	_restartGame = false;

	_oldMode = -1;

	_predictiveDialogRunning = false;
	_predictiveDictText = NULL;
	_predictiveDictLine = NULL;
	_predictiveDictLineCount = 0;
	_firstSlot = 0;

	// NOTE: On game reload the keys do not get set again,
	// thus it is incorrect to reset it in agiInit(). Fixes bug #2823762
	_game.lastController = 0;
	for (int i = 0; i < MAX_DIRS; i++)
		_game.controllerOccured[i] = false;
}

void AgiEngine::initialize() {
	// TODO: Some sound emulation modes do not fit our current music
	//       drivers, and I'm not sure what they are. For now, they might
	//       as well be called "PC Speaker" and "Not PC Speaker".

	// If used platform is Apple IIGS then we must use Apple IIGS sound emulation
	// because Apple IIGS AGI games use only Apple IIGS specific sound resources.
	if (getPlatform() == Common::kPlatformApple2GS) {
		_soundemu = SOUND_EMU_APPLE2GS;
	} else if (getPlatform() == Common::kPlatformCoCo3) {
		_soundemu = SOUND_EMU_COCO3;
	} else {
		switch (MidiDriver::detectMusicDriver(MDT_PCSPK)) {
		case MD_PCSPK:
			_soundemu = SOUND_EMU_PC;
			break;
		default:
			_soundemu = SOUND_EMU_NONE;
			break;
		}
	}

	if (ConfMan.hasKey("render_mode")) {
		_renderMode = Common::parseRenderMode(ConfMan.get("render_mode").c_str());
	} else if (ConfMan.hasKey("platform")) {
		switch (Common::parsePlatform(ConfMan.get("platform"))) {
		case Common::kPlatformAmiga:
			_renderMode = Common::kRenderAmiga;
			break;
		case Common::kPlatformPC:
			_renderMode = Common::kRenderEGA;
			break;
		default:
			_renderMode = Common::kRenderEGA;
			break;
		}
	}

	_buttonStyle = AgiButtonStyle(_renderMode);
	_defaultButtonStyle = AgiButtonStyle();
	_console = new Console(this);
	_gfx = new GfxMgr(this);
	_sound = new SoundMgr(this, _mixer);
	_picture = new PictureMgr(this, _gfx);
	_sprites = new SpritesMgr(this, _gfx);

	_gfx->initMachine();

	_game.gameFlags = 0;

	_game.colorFg = 15;
	_game.colorBg = 0;

	_game.name[0] = '\0';

	_game.sbufOrig = (uint8 *)calloc(_WIDTH, _HEIGHT * 2); // Allocate space for two AGI screens vertically
	_game.sbuf16c  = _game.sbufOrig + SBUF16_OFFSET; // Make sbuf16c point to the 16 color (+control line & priority info) AGI screen
	_game.sbuf256c = _game.sbufOrig + SBUF256_OFFSET; // Make sbuf256c point to the 256 color AGI screen
	_game.sbuf     = _game.sbuf16c; // Make sbuf point to the 16 color (+control line & priority info) AGI screen by default

	_gfx->initVideo();
	_sound->initSound();

	_lastSaveTime = 0;

	_timer->installTimerProc(agiTimerFunctionLow, 10 * 1000, this);

	debugC(2, kDebugLevelMain, "Detect game");


	if (agiDetectGame() == errOK) {
		_game.state = STATE_LOADED;
		debugC(2, kDebugLevelMain, "game loaded");
	} else {
		report("Could not open AGI game");
	}

	debugC(2, kDebugLevelMain, "Init sound");
}

AgiEngine::~AgiEngine() {
	_timer->removeTimerProc(agiTimerFunctionLow);

	// If the engine hasn't been initialized yet via AgiEngine::initialize(), don't attempt to free any resources,
	// as they haven't been allocated. Fixes bug #1742432 - AGI: Engine crashes if no game is detected
	if (_game.state == STATE_INIT) {
		delete _rnd;	// delete _rnd, as it is allocated in the constructor, not in initialize()
		return;
	}

	agiDeinit();
	delete _loader;
	_sound->deinitSound();
	delete _sound;
	_gfx->deinitVideo();
	delete _sprites;
	delete _picture;
	free(_game.sbufOrig);
	_gfx->deinitMachine();
	delete _gfx;
	delete _rnd;
	delete _console;

	free(_predictiveDictLine);
	free(_predictiveDictText);
}

Common::Error AgiBase::init() {

	// Initialize backend
	initGraphics(320, 200, false);

	initialize();

	_gfx->gfxSetPalette();

	return Common::kNoError;
}

Common::Error AgiEngine::go() {
	CursorMan.showMouse(true);

	report(" \nAGI engine %s is ready.\n", gScummVMVersion);
	if (_game.state < STATE_LOADED) {
		do {
			mainCycle();
		} while (_game.state < STATE_RUNNING);
	}

	runGame();

	return Common::kNoError;
}

void AgiEngine::syncSoundSettings() {
	// FIXME/TODO: Please explain why we are using "music_volume" for all
	// three different entries here.
	int soundVolumeMusic = ConfMan.getInt("music_volume");
	int soundVolumeSFX = ConfMan.getInt("music_volume");
	int soundVolumeSpeech = ConfMan.getInt("music_volume");

	_mixer->setVolumeForSoundType(Audio::Mixer::kMusicSoundType, soundVolumeMusic);
	_mixer->setVolumeForSoundType(Audio::Mixer::kSFXSoundType, soundVolumeSFX);
	_mixer->setVolumeForSoundType(Audio::Mixer::kSpeechSoundType, soundVolumeSpeech);
}

void AgiEngine::parseFeatures() {
	if (!ConfMan.hasKey("features"))
		return;

	char *features = strdup(ConfMan.get("features").c_str());
	const char *feature[100];
	int numFeatures = 0;

	char *tok = strtok(features, " ");
	if (tok) {
		do {
			feature[numFeatures++] = tok;
		} while ((tok = strtok(NULL, " ")) != NULL);
	} else {
		feature[numFeatures++] = features;
	}

	const struct Flags {
		const char *name;
		uint32 flag;
	} flags[] = {
		{ "agimouse", GF_AGIMOUSE },
		{ "agds", GF_AGDS },
		{ "agi256", GF_AGI256 },
		{ "agi256-2", GF_AGI256_2 },
		{ "agipal", GF_AGIPAL },
		{ 0, 0 }
	};

	for (int i = 0; i < numFeatures; i++) {
		for (const Flags *flag = flags; flag->name; flag++) {
			if (!scumm_stricmp(feature[i], flag->name)) {
				debug(0, "Added feature: %s", flag->name);

				setFeature(flag->flag);
				break;
			}
		}
	}
}

} // End of namespace Agi