aboutsummaryrefslogtreecommitdiff
path: root/engines/hugo/file.cpp
blob: 78bcc46e851c39f5f1c2e264d19820c63dc808e7 (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
/* 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.
 *
 * $URL$
 * $Id$
 *
 */

/*
 * This code is based on original Hugo Trilogy source code
 *
 * Copyright (c) 1989-1995 David P. Gray
 *
 */

#include "common/system.h"
#include "common/savefile.h"

#include "hugo/hugo.h"
#include "hugo/file.h"
#include "hugo/global.h"
#include "hugo/schedule.h"
#include "hugo/display.h"
#include "hugo/util.h"
#include "hugo/object.h"

namespace Hugo {
FileManager::FileManager(HugoEngine *vm) : _vm(vm) {
}

FileManager::~FileManager() {
}

/**
* Convert 4 planes (RGBI) data to 8-bit DIB format
* Return original plane data ptr
*/
byte *FileManager::convertPCC(byte *p, uint16 y, uint16 bpl, image_pt dataPtr) {
	debugC(2, kDebugFile, "convertPCC(byte *p, %d, %d, image_pt data_p)", y, bpl);

	dataPtr += y * bpl * 8;                         // Point to correct DIB line
	for (int16 r = 0, g = bpl, b = g + bpl, i = b + bpl; r < bpl; r++, g++, b++, i++) { // Each byte in all planes
		for (int8 bit = 7; bit >= 0; bit--) {       // Each bit in byte
			*dataPtr++ = (((p[r] >> bit & 1) << 0) |
			              ((p[g] >> bit & 1) << 1) |
			              ((p[b] >> bit & 1) << 2) |
			              ((p[i] >> bit & 1) << 3));
		}
	}
	return p;
}

/**
* Read a pcx file of length len.  Use supplied seq_p and image_p or
* allocate space if NULL.  Name used for errors.  Returns address of seq_p
* Set first TRUE to initialize b_index (i.e. not reading a sequential image in file).
*/
seq_t *FileManager::readPCX(Common::File &f, seq_t *seqPtr, byte *imagePtr, bool firstFl, const char *name) {
	debugC(1, kDebugFile, "readPCX(..., %s)", name);

	// Read in the PCC header and check consistency
	static PCC_header_t PCC_header;
	PCC_header.mfctr = f.readByte();
	PCC_header.vers = f.readByte();
	PCC_header.enc = f.readByte();
	PCC_header.bpx = f.readByte();
	PCC_header.x1 = f.readUint16LE();
	PCC_header.y1 = f.readUint16LE();
	PCC_header.x2 = f.readUint16LE();
	PCC_header.y2 = f.readUint16LE();
	PCC_header.xres = f.readUint16LE();
	PCC_header.yres = f.readUint16LE();
	f.read(PCC_header.palette, sizeof(PCC_header.palette));
	PCC_header.vmode = f.readByte();
	PCC_header.planes = f.readByte();
	PCC_header.bytesPerLine = f.readUint16LE();
	f.read(PCC_header.fill2, sizeof(PCC_header.fill2));

	if (PCC_header.mfctr != 10)
		error("Bad data file format: %s", name);

	// Allocate memory for seq_t if 0
	if (seqPtr == 0) {
		if ((seqPtr = (seq_t *)malloc(sizeof(seq_t))) == 0)
			error("Insufficient memory to run game.");
	}

	// Find size of image data in 8-bit DIB format
	// Note save of x2 - marks end of valid data before garbage
	uint16 bytesPerLine4 = PCC_header.bytesPerLine * 4; // 4-bit bpl
	seqPtr->bytesPerLine8 = bytesPerLine4 * 2;      // 8-bit bpl
	seqPtr->lines = PCC_header.y2 - PCC_header.y1 + 1;
	seqPtr->x2 = PCC_header.x2 - PCC_header.x1 + 1;
	// Size of the image
	uint16 size = seqPtr->lines * seqPtr->bytesPerLine8;

	// Allocate memory for image data if NULL
	if (imagePtr == 0) {
		imagePtr = (byte *)malloc((size_t) size);
	}
	assert(imagePtr);

	seqPtr->imagePtr = imagePtr;

	// Process the image data, converting to 8-bit DIB format
	uint16 y = 0;                                   // Current line index
	byte  pline[XPIX];                              // Hold 4 planes of data
	byte  *p = pline;                               // Ptr to above
	while (y < seqPtr->lines) {
		byte c = f.readByte();
		if ((c & REP_MASK) == REP_MASK) {
			byte d = f.readByte();                  // Read data byte
			for (int i = 0; i < (c & LEN_MASK); i++) {
				*p++ = d;
				if ((uint16)(p - pline) == bytesPerLine4)
					p = convertPCC(pline, y++, PCC_header.bytesPerLine, imagePtr);
			}
		} else {
			*p++ = c;
			if ((uint16)(p - pline) == bytesPerLine4)
				p = convertPCC(pline, y++, PCC_header.bytesPerLine, imagePtr);
		}
	}
	return seqPtr;
}

/**
* Read object file of PCC images into object supplied
*/
void FileManager::readImage(int objNum, object_t *objPtr) {
	debugC(1, kDebugFile, "readImage(%d, object_t *objPtr)", objNum);

	/**
	* Structure of object file lookup entry
	*/
	struct objBlock_t {
		uint32 objOffset;
		uint32 objLength;
	};

	if (!objPtr->seqNumb)                           // This object has no images
		return;

	if (_vm->isPacked()) {
		_objectsArchive.seek((uint32)objNum * sizeof(objBlock_t), SEEK_SET);

		objBlock_t objBlock;                        // Info on file within database
		objBlock.objOffset = _objectsArchive.readUint32LE();
		objBlock.objLength = _objectsArchive.readUint32LE();

		_objectsArchive.seek(objBlock.objOffset, SEEK_SET);
	} else {
		char *buf = (char *) malloc(2048 + 1);      // Buffer for file access
		strcat(strcat(strcpy(buf, _vm->_picDir), _vm->_arrayNouns[objPtr->nounIndex][0]), OBJEXT);
		if (!_objectsArchive.open(buf)) {
			warning("File %s not found, trying again with %s%s", buf, _vm->_arrayNouns[objPtr->nounIndex][0], OBJEXT);
			strcat(strcpy(buf, _vm->_arrayNouns[objPtr->nounIndex][0]), OBJEXT);
			if (!_objectsArchive.open(buf))
				error("File not found: %s", buf);
		}
		free(buf);
	}

	bool  firstFl = true;                           // Initializes pcx read function
	seq_t *seqPtr = 0;                              // Ptr to sequence structure

	// Now read the images into an images list
	for (int j = 0; j < objPtr->seqNumb; j++) {     // for each sequence
		for (int k = 0; k < objPtr->seqList[j].imageNbr; k++) { // each image
			if (k == 0) {                           // First image
				// Read this image - allocate both seq and image memory
				seqPtr = readPCX(_objectsArchive, 0, 0, firstFl, _vm->_arrayNouns[objPtr->nounIndex][0]);
				objPtr->seqList[j].seqPtr = seqPtr;
				firstFl = false;
			} else {                                // Subsequent image
				// Read this image - allocate both seq and image memory
				seqPtr->nextSeqPtr = readPCX(_objectsArchive, 0, 0, firstFl, _vm->_arrayNouns[objPtr->nounIndex][0]);
				seqPtr = seqPtr->nextSeqPtr;
			}

			// Compute the bounding box - x1, x2, y1, y2
			// Note use of x2 - marks end of valid data in row
			uint16 x2 = seqPtr->x2;
			seqPtr->x1 = seqPtr->x2;
			seqPtr->x2 = 0;
			seqPtr->y1 = seqPtr->lines;
			seqPtr->y2 = 0;

			image_pt dibPtr = seqPtr->imagePtr;
			for (int y = 0; y < seqPtr->lines; y++, dibPtr += seqPtr->bytesPerLine8 - x2) {
				for (int x = 0; x < x2; x++) {
					if (*dibPtr++) {                // Some data found
						if (x < seqPtr->x1)
							seqPtr->x1 = x;
						if (x > seqPtr->x2)
							seqPtr->x2 = x;
						if (y < seqPtr->y1)
							seqPtr->y1 = y;
						if (y > seqPtr->y2)
							seqPtr->y2 = y;
					}
				}
			}
		}
		assert(seqPtr);
		seqPtr->nextSeqPtr = objPtr->seqList[j].seqPtr; // loop linked list to head
	}

	// Set the current image sequence to first or last
	switch (objPtr->cycling) {
	case INVISIBLE:                                 // (May become visible later)
	case ALMOST_INVISIBLE:
	case NOT_CYCLING:
	case CYCLE_FORWARD:
		objPtr->currImagePtr = objPtr->seqList[0].seqPtr;
		break;
	case CYCLE_BACKWARD:
		objPtr->currImagePtr = seqPtr;
		break;
	default:
		warning("Unexpected cycling: %d", objPtr->cycling);
	}

	if (!_vm->isPacked())
		_objectsArchive.close();
}

/**
* Read sound (or music) file data.  Call with SILENCE to free-up
* any allocated memory.  Also returns size of data
*/
sound_pt FileManager::getSound(int16 sound, uint16 *size) {
	debugC(1, kDebugFile, "getSound(%d, %d)", sound, *size);

	// No more to do if SILENCE (called for cleanup purposes)
	if (sound == _vm->_soundSilence)
		return 0;

	// Open sounds file
	Common::File fp;                                // Handle to SOUND_FILE
	if (!fp.open(SOUND_FILE)) {
		warning("Hugo Error: File not found %s", SOUND_FILE);
		return 0;
	}

	// If this is the first call, read the lookup table
	static bool has_read_header = false;
	static sound_hdr_t s_hdr[MAX_SOUNDS];           // Sound lookup table

	if (!has_read_header) {
		if (fp.read(s_hdr, sizeof(s_hdr)) != sizeof(s_hdr))
			error("Wrong sound file format: %s", SOUND_FILE);
		has_read_header = true;
	}

	*size = s_hdr[sound].size;
	if (*size == 0)
		error("Wrong sound file format or missing sound %d: %s", sound, SOUND_FILE);

	// Allocate memory for sound or music, if possible
	sound_pt soundPtr = (byte *)malloc(s_hdr[sound].size); // Ptr to sound data
	assert(soundPtr);

	// Seek to data and read it
	fp.seek(s_hdr[sound].offset, SEEK_SET);
	if (fp.read(soundPtr, s_hdr[sound].size) != s_hdr[sound].size)
		error("File not found: %s", SOUND_FILE);

	fp.close();

	return soundPtr;
}

/**
* Return whether file exists or not
*/
bool FileManager::fileExists(char *filename) {
	Common::File f;
	return(f.exists(filename));
}

/**
* Save game to supplied slot
*/
void FileManager::saveGame(int16 slot, const char *descrip) {
	debugC(1, kDebugFile, "saveGame(%d, %s)", slot, descrip);

	// Get full path of saved game file - note test for INITFILE
	Common::String path = Common::String::format(_vm->_saveFilename.c_str(), slot);
	Common::WriteStream *out = _vm->getSaveFileManager()->openForSaving(path);
	if (!out) {
		warning("Can't create file '%s', game not saved", path.c_str());
		return;
	}

	// Write version.  We can't restore from obsolete versions
	out->writeByte(kSavegameVersion);

	// Save description of saved game
	out->write(descrip, DESCRIPLEN);

	_vm->_object->saveObjects(out);

	const status_t &gameStatus = _vm->getGameStatus();

	// Save whether hero image is swapped
	out->writeByte(_vm->_heroImage);

	// Save score
	out->writeSint16BE(_vm->getScore());

	// Save story mode
	out->writeByte((gameStatus.storyModeFl) ? 1 : 0);

	// Save jumpexit mode
	out->writeByte((gameStatus.jumpExitFl) ? 1 : 0);

	// Save gameover status
	out->writeByte((gameStatus.gameOverFl) ? 1 : 0);

	// Save screen states
	for (int i = 0; i < _vm->_numScreens; i++)
		out->writeByte(_vm->_screenStates[i]);

	// Save points table
	for (int i = 0; i < _vm->_numBonuses; i++) {
		out->writeByte(_vm->_points[i].score);
		out->writeByte((_vm->_points[i].scoredFl) ? 1 : 0);
	}

	// Now save current time and all current events in event queue
	_vm->_scheduler->saveEvents(out);

	// Save palette table
	_vm->_screen->savePal(out);

	// Save maze status
	out->writeByte((_maze.enabledFl) ? 1 : 0);
	out->writeByte(_maze.size);
	out->writeSint16BE(_maze.x1);
	out->writeSint16BE(_maze.y1);
	out->writeSint16BE(_maze.x2);
	out->writeSint16BE(_maze.y2);
	out->writeSint16BE(_maze.x3);
	out->writeSint16BE(_maze.x4);
	out->writeByte(_maze.firstScreenIndex);

	out->finalize();

	delete out;
}

/**
* Restore game from supplied slot number
*/
void FileManager::restoreGame(int16 slot) {
	debugC(1, kDebugFile, "restoreGame(%d)", slot);

	// Initialize new-game status
	_vm->initStatus();

	// Get full path of saved game file - note test for INITFILE
	Common::String path; // Full path of saved game

	path = Common::String::format(_vm->_saveFilename.c_str(), slot);

	Common::SeekableReadStream *in = _vm->getSaveFileManager()->openForLoading(path);
	if (!in)
		return;

	// Check version, can't restore from different versions
	int saveVersion = in->readByte();
	if (saveVersion != kSavegameVersion) {
		error("Savegame of incompatible version");
		return;
	}

	// Skip over description
	in->seek(DESCRIPLEN, SEEK_CUR);

	// If hero image is currently swapped, swap it back before restore
	if (_vm->_heroImage != HERO)
		_vm->_object->swapImages(HERO, _vm->_heroImage);

	_vm->_object->restoreObjects(in);

	_vm->_heroImage = in->readByte();

	// If hero swapped in saved game, swap it
	byte heroImg = _vm->_heroImage;
	if (heroImg != HERO)
		_vm->_object->swapImages(HERO, _vm->_heroImage);
	_vm->_heroImage = heroImg;

	status_t &gameStatus = _vm->getGameStatus();

	int score = in->readSint16BE();
	_vm->setScore(score);

	gameStatus.storyModeFl = (in->readByte() == 1);
	gameStatus.jumpExitFl = (in->readByte() == 1);
	gameStatus.gameOverFl = (in->readByte() == 1);
	for (int i = 0; i < _vm->_numScreens; i++)
		_vm->_screenStates[i] = in->readByte();

	// Restore points table
	for (int i = 0; i < _vm->_numBonuses; i++) {
		_vm->_points[i].score = in->readByte();
		_vm->_points[i].scoredFl = (in->readByte() == 1);
	}

	_vm->_object->restoreAllSeq();

	// Now restore time of the save and the event queue
	_vm->_scheduler->restoreEvents(in);

	// Restore palette and change it if necessary
	_vm->_screen->restorePal(in);

	// Restore maze status
	_maze.enabledFl = (in->readByte() == 1);
	_maze.size = in->readByte();
	_maze.x1 = in->readSint16BE();
	_maze.y1 = in->readSint16BE();
	_maze.x2 = in->readSint16BE();
	_maze.y2 = in->readSint16BE();
	_maze.x3 = in->readSint16BE();
	_maze.x4 = in->readSint16BE();
	_maze.firstScreenIndex = in->readByte();

	delete in;
}

/**
* Read the encrypted text from the boot file and print it
*/
void FileManager::printBootText() {
	debugC(1, kDebugFile, "printBootText");

	Common::File ofp;
	if (!ofp.open(BOOTFILE)) {
		if (_vm->_gameVariant == 3) {
			//TODO initialize properly _boot structure
			warning("printBootText - Skipping as H1 Dos may be a freeware");
			return;
		} else {
			error("Missing startup file");
		}
	}

	// Allocate space for the text and print it
	char *buf = (char *)malloc(_boot.exit_len + 1);
	if (buf) {
		// Skip over the boot structure (already read) and read exit text
		ofp.seek((long)sizeof(_boot), SEEK_SET);
		if (ofp.read(buf, _boot.exit_len) != (size_t)_boot.exit_len)
			error("Error while reading startup file");

		// Decrypt the exit text, using CRYPT substring
		int i;
		for (i = 0; i < _boot.exit_len; i++)
			buf[i] ^= CRYPT[i % strlen(CRYPT)];

		buf[i] = '\0';
		Utils::Box(BOX_OK, "%s", buf);
	}

	free(buf);
	ofp.close();
}

/**
* Reads boot file for program environment.  Fatal error if not there or
* file checksum is bad.  De-crypts structure while checking checksum
*/
void FileManager::readBootFile() {
	debugC(1, kDebugFile, "readBootFile");

	Common::File ofp;
	if (!ofp.open(BOOTFILE)) {
		if (_vm->_gameVariant == 3) {
			//TODO initialize properly _boot structure
			warning("readBootFile - Skipping as H1 Dos may be a freeware");
			return;
		} else {
			error("Missing startup file");
		}
	}

	if (ofp.size() < (int32)sizeof(_boot))
		error("Corrupted startup file");

	_boot.checksum = ofp.readByte();
	_boot.registered = ofp.readByte();
	ofp.read(_boot.pbswitch, sizeof(_boot.pbswitch));
	ofp.read(_boot.distrib, sizeof(_boot.distrib));
	_boot.exit_len = ofp.readUint16LE();

	byte *p = (byte *)&_boot;

	byte checksum = 0;
	for (uint32 i = 0; i < sizeof(_boot); i++) {
		checksum ^= p[i];
		p[i] ^= CRYPT[i % strlen(CRYPT)];
	}
	ofp.close();

	if (checksum)
		error("Corrupted startup file");
}

/**
* Returns address of uif_hdr[id], reading it in if first call
*/
uif_hdr_t *FileManager::getUIFHeader(uif_t id) {
	debugC(1, kDebugFile, "getUIFHeader(%d)", id);

	static bool firstFl = true;
	static uif_hdr_t UIFHeader[MAX_UIFS];           // Lookup for uif fonts/images

	// Initialize offset lookup if not read yet
	if (firstFl) {
		firstFl = false;
		// Open unbuffered to do far read
		Common::File ip;                            // Image data file
		if (!ip.open(UIF_FILE))
			error("File not found: %s", UIF_FILE);

		if (ip.size() < (int32)sizeof(UIFHeader))
			error("Wrong file format: %s", UIF_FILE);

		for (int i = 0; i < MAX_UIFS; ++i) {
			UIFHeader[i].size = ip.readUint16LE();
			UIFHeader[i].offset = ip.readUint32LE();
		}

		ip.close();
	}
	return &UIFHeader[id];
}

/**
* Read uif item into supplied buffer.
*/
void FileManager::readUIFItem(int16 id, byte *buf) {
	debugC(1, kDebugFile, "readUIFItem(%d, ...)", id);

	// Open uif file to read data
	Common::File ip;                                // UIF_FILE handle
	if (!ip.open(UIF_FILE))
		error("File not found: %s", UIF_FILE);

	// Seek to data
	uif_hdr_t *UIFHeaderPtr = getUIFHeader((uif_t)id);
	ip.seek(UIFHeaderPtr->offset, SEEK_SET);

	// We support pcx images and straight data
	seq_t *dummySeq;                                // Dummy seq_t for image data
	switch (id) {
	case UIF_IMAGES:                                // Read uif images file
		dummySeq = readPCX(ip, 0, buf, true, UIF_FILE);
		free(dummySeq);
		break;
	default:                                        // Read file data into supplied array
		if (ip.read(buf, UIFHeaderPtr->size) != UIFHeaderPtr->size)
			error("Wrong file format: %s", UIF_FILE);
		break;
	}

	ip.close();
}

/**
* Simple instructions given when F1 pressed twice in a row
* Only in DOS versions
*/
void FileManager::instructions() {
	Common::File f;
	if (!f.open(HELPFILE)) {
		warning("help.dat not found");
		return;
	}

	char readBuf[2];
	while (f.read(readBuf, 1)) {
		char line[1024], *wrkLine;
		wrkLine = line;
		wrkLine[0] = readBuf[0];
		wrkLine++;
		do {
			f.read(wrkLine, 1);
		} while (*wrkLine++ != EOP);
		wrkLine[-2] = '\0';                         // Remove EOP and previous CR
		Utils::Box(BOX_ANY, "%s", line);
		wrkLine = line;
		f.read(readBuf, 2);                         // Remove CRLF after EOP
	}
	f.close();
}

/**
* Read the uif image file (inventory icons)
*/
void FileManager::readUIFImages() {
	debugC(1, kDebugFile, "readUIFImages");

	readUIFItem(UIF_IMAGES, _vm->_screen->getGUIBuffer());   // Read all uif images
}

} // End of namespace Hugo