aboutsummaryrefslogtreecommitdiff
path: root/engines/xeen/saves.cpp
blob: f69757f4d00dd429349229e87d2b44c51ac40f04 (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
/* 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.
 *
 */

#include "common/scummsys.h"
#include "common/algorithm.h"
#include "common/memstream.h"
#include "common/substream.h"
#include "graphics/scaler.h"
#include "graphics/thumbnail.h"
#include "xeen/saves.h"
#include "xeen/files.h"
#include "xeen/xeen.h"

namespace Xeen {

SavesManager::SavesManager(const Common::String &targetName): _targetName(targetName),
		_wonWorld(false), _wonDarkSide(false) {
	File::_xeenSave = nullptr;
	File::_darkSave = nullptr;

	if (g_vm->getGameID() != GType_Clouds) {
		File::_darkSave = new SaveArchive(g_vm->_party);
		File::_darkSave->reset(File::_darkCc);
	}
	if (g_vm->getGameID() != GType_DarkSide) {
		File::_xeenSave = new SaveArchive(g_vm->_party);
		File::_xeenSave->reset(File::_xeenCc);
	}

	File::_currentSave = g_vm->getGameID() == GType_DarkSide ?
		File::_darkSave : File::_xeenSave;
	assert(File::_currentSave);

	// Set any final initial values
	Party &party = *g_vm->_party;
	party.resetBlacksmithWares();
	party._year = g_vm->getGameID() == GType_WorldOfXeen ? 610 : 850;
	party._totalTime = 0;
}

SavesManager::~SavesManager() {
	delete File::_xeenSave;
	delete File::_darkSave;
}

const char *const SAVEGAME_STR = "XEEN";
#define SAVEGAME_STR_SIZE 6

bool SavesManager::readSavegameHeader(Common::InSaveFile *in, XeenSavegameHeader &header) {
	char saveIdentBuffer[SAVEGAME_STR_SIZE + 1];
	header._thumbnail = nullptr;

	// Validate the header Id
	in->read(saveIdentBuffer, SAVEGAME_STR_SIZE + 1);
	if (strncmp(saveIdentBuffer, SAVEGAME_STR, SAVEGAME_STR_SIZE))
		return false;

	header._version = in->readByte();
	if (header._version > XEEN_SAVEGAME_VERSION)
		return false;

	// Read in the string
	header._saveName.clear();
	char ch;
	while ((ch = (char)in->readByte()) != '\0')
		header._saveName += ch;

	// Get the thumbnail
	header._thumbnail = Graphics::loadThumbnail(*in);
	if (!header._thumbnail)
		return false;

	// Read in save date/time
	header._year = in->readSint16LE();
	header._month = in->readSint16LE();
	header._day = in->readSint16LE();
	header._hour = in->readSint16LE();
	header._minute = in->readSint16LE();
	header._totalFrames = in->readUint32LE();

	return true;
}

void SavesManager::writeSavegameHeader(Common::OutSaveFile *out, XeenSavegameHeader &header) {
	EventsManager &events = *g_vm->_events;
	Screen &screen = *g_vm->_screen;

	// Write out a savegame header
	out->write(SAVEGAME_STR, SAVEGAME_STR_SIZE + 1);

	out->writeByte(XEEN_SAVEGAME_VERSION);

	// Write savegame name
	out->writeString(header._saveName);
	out->writeByte('\0');

	// Write a thumbnail of the screen
	uint8 thumbPalette[768];
	screen.getPalette(thumbPalette);
	Graphics::Surface saveThumb;
	::createThumbnail(&saveThumb, (const byte *)screen.getPixels(),
		screen.w, screen.h, thumbPalette);
	Graphics::saveThumbnail(*out, saveThumb);
	saveThumb.free();

	// Write out the save date/time
	TimeDate td;
	g_system->getTimeAndDate(td);
	out->writeSint16LE(td.tm_year + 1900);
	out->writeSint16LE(td.tm_mon + 1);
	out->writeSint16LE(td.tm_mday);
	out->writeSint16LE(td.tm_hour);
	out->writeSint16LE(td.tm_min);
	out->writeUint32LE(events.playTime());
}

Common::Error SavesManager::saveGameState(int slot, const Common::String &desc) {
	Common::OutSaveFile *out = g_system->getSavefileManager()->openForSaving(
		generateSaveName(slot));
	if (!out)
		return Common::kCreatingFileFailed;

	// Push map and party data to the save archives
	Map &map = *g_vm->_map;
	map.saveMaze();

	// Write the savegame header
	XeenSavegameHeader header;
	header._saveName = desc;
	writeSavegameHeader(out, header);

	// Loop through saving the sides' save archives
	SaveArchive *archives[2] = { File::_xeenSave, File::_darkSave };
	for (int idx = 0; idx < 2; ++idx) {
		if (archives[idx]) {
			archives[idx]->save(*out);
		} else {
			// Side isn't present
			out->writeUint32LE(0);
		}
	}

	// Write out miscellaneous
	FileManager &files = *g_vm->_files;
	files.save(*out);

	out->finalize();
	delete out;

	return Common::kNoError;
}

Common::Error SavesManager::loadGameState(int slot) {
	EventsManager &events = *g_vm->_events;
	FileManager &files = *g_vm->_files;
	Map &map = *g_vm->_map;
	Party &party = *g_vm->_party;

	Common::InSaveFile *saveFile = g_system->getSavefileManager()->openForLoading(
		generateSaveName(slot));
	if (!saveFile)
		return Common::kReadingFailed;

	// Load the savaegame header
	XeenSavegameHeader header;
	if (!readSavegameHeader(saveFile, header))
		error("Invalid savegame");

	if (header._thumbnail) {
		header._thumbnail->free();
		delete header._thumbnail;
	}

	// Set the total play time
	events.setPlayTime(header._totalFrames);

	// Loop through loading the sides' save archives
	SaveArchive *archives[2] = { File::_xeenSave, File::_darkSave };
	for (int idx = 0; idx < 2; ++idx) {
		uint fileSize = saveFile->readUint32LE();

		if (archives[idx]) {
			Common::SeekableSubReadStream arcStream(saveFile, saveFile->pos(),
				saveFile->pos() + fileSize);
			archives[idx]->load(arcStream);
		} else {
			assert(!fileSize);
		}
	}

	// Read in miscellaneous
	files.load(*saveFile);

	// Load the new map
	map._loadDarkSide = files._isDarkCc;
	map.load(party._mazeId);

	return Common::kNoError;
}

Common::String SavesManager::generateSaveName(int slot) {
	return Common::String::format("%s.%03d", _targetName.c_str(), slot);
}

} // End of namespace Xeen