aboutsummaryrefslogtreecommitdiff
path: root/engines/hopkins/saveload.cpp
blob: 35a80458ff4c6a4250933ab4be5342fdf6e933ab (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
/* 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 "hopkins/saveload.h"

#include "hopkins/files.h"
#include "hopkins/globals.h"
#include "hopkins/hopkins.h"


#include "common/system.h"
#include "common/savefile.h"
#include "graphics/surface.h"
#include "graphics/scaler.h"
#include "graphics/thumbnail.h"

namespace Hopkins {

const char *SAVEGAME_STR = "HOPKINS";
#define SAVEGAME_STR_SIZE 13

SaveLoadManager::SaveLoadManager(HopkinsEngine *vm) {
	_vm = vm;
}

bool SaveLoadManager::save(const Common::String &file, const void *buf, size_t n) {
	Common::OutSaveFile *savefile = g_system->getSavefileManager()->openForSaving(file);

	if (savefile) {
		size_t bytesWritten = savefile->write(buf, n);
		savefile->finalize();
		delete savefile;

		return bytesWritten == n;
	} else
		return false;
}

bool SaveLoadManager::saveExists(const Common::String &file) {
	Common::InSaveFile *savefile = g_system->getSavefileManager()->openForLoading(file);
	bool result = savefile != NULL;
	delete savefile;
	return result;
}

// Save File
bool SaveLoadManager::saveFile(const Common::String &file, const void *buf, size_t n) {
	return save(file, buf, n);
}

void SaveLoadManager::load(const Common::String &file, byte *buf) {
	Common::InSaveFile *savefile = g_system->getSavefileManager()->openForLoading(file);
	if (savefile == NULL)
		error("Error opening file - %s", file.c_str());

	int32 filesize = savefile->size();
	savefile->read(buf, filesize);
	delete savefile;
}

WARN_UNUSED_RESULT bool SaveLoadManager::readSavegameHeader(Common::InSaveFile *in, hopkinsSavegameHeader &header, bool skipThumbnail) {
	char saveIdentBuffer[SAVEGAME_STR_SIZE + 1];

	// 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 > HOPKINS_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
	if (!Graphics::loadThumbnail(*in, header._thumbnail, skipThumbnail)) {
		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 SaveLoadManager::writeSavegameHeader(Common::OutSaveFile *out, hopkinsSavegameHeader &header) {
	// Write out a savegame header
	out->write(SAVEGAME_STR, SAVEGAME_STR_SIZE + 1);

	out->writeByte(HOPKINS_SAVEGAME_VERSION);

	// Write savegame name
	out->write(header._saveName.c_str(), header._saveName.size() + 1);

	// Create a thumbnail and save it
	Graphics::Surface *thumb = new Graphics::Surface();
	createThumbnail(thumb);
	Graphics::saveThumbnail(*out, *thumb);
	thumb->free();
	delete thumb;

	// 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(_vm->_events->_gameCounter);
}

Common::Error SaveLoadManager::saveGame(int slot, const Common::String &saveName) {
	/* Pack any necessary data into the savegame data structure */
	// Set the selected slot number
	_vm->_globals->_saveData->_data[svLastSavegameSlot] = slot;

	// Set up the inventory
	for (int i = 0; i < 35; ++i)
		_vm->_globals->_saveData->_inventory[i] = _vm->_globals->_inventory[i];

	_vm->_globals->_saveData->_mapCarPosX = _vm->_objectsMan->_mapCarPosX;
	_vm->_globals->_saveData->_mapCarPosY = _vm->_objectsMan->_mapCarPosY;

	/* Create the savegame */
	Common::OutSaveFile *savefile = g_system->getSavefileManager()->openForSaving(_vm->generateSaveName(slot));
	if (!savefile)
		return Common::kCreatingFileFailed;

	// Set up the serializer
	Common::Serializer serializer(NULL, savefile);

	// Write out the savegame header
	hopkinsSavegameHeader header;
	header._saveName = saveName;
	header._version = HOPKINS_SAVEGAME_VERSION;
	writeSavegameHeader(savefile, header);

	// Write out the savegame data
	syncSavegameData(serializer, header._version);

	// Save file complete
	savefile->finalize();
	delete savefile;

	return Common::kNoError;
}

Common::Error SaveLoadManager::loadGame(int slot) {
	// Try and open the save file for reading
	Common::InSaveFile *savefile = g_system->getSavefileManager()->openForLoading(
		_vm->generateSaveName(slot));
	if (!savefile)
		return Common::kReadingFailed;

	// Set up the serializer
	Common::Serializer serializer(savefile, NULL);

	// Read in the savegame header
	hopkinsSavegameHeader header;
	if (!readSavegameHeader(savefile, header)) {
		delete savefile;
		return Common::kReadingFailed;
	}

	// Read in the savegame data
	syncSavegameData(serializer, header._version);

	// Loading save file complete
	delete savefile;

	// Unpack the inventory
	for (int i = 0; i < 35; ++i)
		_vm->_globals->_inventory[i] = _vm->_globals->_saveData->_inventory[i];

	// Set variables from loaded data as necessary
	_vm->_globals->_saveData->_data[svLastSavegameSlot] = slot;
	_vm->_globals->_exitId = _vm->_globals->_saveData->_data[svLastScreenId];
	_vm->_globals->_saveData->_data[svLastPrevScreenId] = 0;
	_vm->_globals->_screenId = 0;
	_vm->_objectsMan->_mapCarPosX = _vm->_globals->_saveData->_mapCarPosX;
	_vm->_objectsMan->_mapCarPosY = _vm->_globals->_saveData->_mapCarPosY;

	return Common::kNoError;
}

WARN_UNUSED_RESULT bool SaveLoadManager::readSavegameHeader(int slot, hopkinsSavegameHeader &header, bool skipThumbnail) {
	// Try and open the save file for reading
	Common::InSaveFile *savefile = g_system->getSavefileManager()->openForLoading(
		_vm->generateSaveName(slot));
	if (!savefile)
		return false;

	bool result = readSavegameHeader(savefile, header, skipThumbnail);
	delete savefile;
	return result;
}

#define REDUCE_AMOUNT 80

void SaveLoadManager::createThumbnail(Graphics::Surface *s) {
	int w = _vm->_graphicsMan->zoomOut(SCREEN_WIDTH, REDUCE_AMOUNT);
	int h = _vm->_graphicsMan->zoomOut(SCREEN_HEIGHT - 40, REDUCE_AMOUNT);

	Graphics::Surface thumb8;
	thumb8.create(w, h, Graphics::PixelFormat::createFormatCLUT8());

	_vm->_graphicsMan->reduceScreenPart(_vm->_graphicsMan->_frontBuffer, (byte *)thumb8.getPixels(),
		_vm->_events->_startPos.x, 20, SCREEN_WIDTH, SCREEN_HEIGHT - 40, 80);

	// Convert the 8-bit pixel to 16 bit surface
	s->create(w, h, Graphics::PixelFormat(2, 5, 6, 5, 0, 11, 5, 0, 0));

	const byte *srcP = (const byte *)thumb8.getPixels();
	uint16 *destP = (uint16 *)s->getPixels();

	for (int yp = 0; yp < h; ++yp) {
		// Copy over the line, using the source pixels as lookups into the pixels palette
		const byte *lineSrcP = srcP;
		uint16 *lineDestP = destP;

		for (int xp = 0; xp < w; ++xp)
			*lineDestP++ = *(uint16 *)&_vm->_graphicsMan->_palettePixels[*lineSrcP++ * 2];

		// Move to the start of the next line
		srcP += w;
		destP += w;
	}
	thumb8.free();
}

void SaveLoadManager::syncSavegameData(Common::Serializer &s, int version) {
	// The brief version 3 had the highscores embedded. They're in a separate file now, so skip
	if (version == 3 && s.isLoading())
		s.skip(100);

	s.syncBytes(&_vm->_globals->_saveData->_data[0], 2050);
	syncCharacterLocation(s, _vm->_globals->_saveData->_cloneHopkins);
	syncCharacterLocation(s, _vm->_globals->_saveData->_realHopkins);
	syncCharacterLocation(s, _vm->_globals->_saveData->_samantha);

	for (int i = 0; i < 35; ++i)
		s.syncAsSint16LE(_vm->_globals->_saveData->_inventory[i]);

	if (version > 1) {
		s.syncAsSint16LE(_vm->_globals->_saveData->_mapCarPosX);
		s.syncAsSint16LE(_vm->_globals->_saveData->_mapCarPosY);
	} else {
		_vm->_globals->_saveData->_mapCarPosX = _vm->_globals->_saveData->_mapCarPosY = 0;
	}

}

void SaveLoadManager::syncCharacterLocation(Common::Serializer &s, CharacterLocation &item) {
	s.syncAsSint16LE(item._pos.x);
	s.syncAsSint16LE(item._pos.y);
	s.syncAsSint16LE(item._startSpriteIndex);
	s.syncAsSint16LE(item._location);
	s.syncAsSint16LE(item._zoomFactor);
}

void SaveLoadManager::convertThumb16To8(Graphics::Surface *thumb16, Graphics::Surface *thumb8) {
	thumb8->create(thumb16->w, thumb16->h, Graphics::PixelFormat::createFormatCLUT8());
	Graphics::PixelFormat pixelFormat16(2, 5, 6, 5, 0, 11, 5, 0, 0);

	byte paletteR[PALETTE_SIZE];
	byte paletteG[PALETTE_SIZE];
	byte paletteB[PALETTE_SIZE];
	for (int palIndex = 0; palIndex < PALETTE_SIZE; ++palIndex) {
		uint16 p = READ_UINT16(&_vm->_graphicsMan->_palettePixels[palIndex * 2]);
		pixelFormat16.colorToRGB(p, paletteR[palIndex], paletteG[palIndex], paletteB[palIndex]);
	}

	const uint16 *srcP = (const uint16 *)thumb16->getPixels();
	byte *destP = (byte *)thumb8->getPixels();

	for (int yp = 0; yp < thumb16->h; ++yp) {
		const uint16 *lineSrcP = srcP;
		byte *lineDestP = destP;

		for (int xp = 0; xp < thumb16->w; ++xp) {
			byte r, g, b;
			pixelFormat16.colorToRGB(*lineSrcP++, r, g, b);

			// Do like in the original and show thumbnail as a grayscale picture
			int lum = (r * 21 + g * 72 + b * 7) / 100;
			r = g = b = lum;

			// Scan the palette for the closest match
			int difference = 99999, foundIndex = 0;
			for (int palIndex = 0; palIndex < PALETTE_SIZE; ++palIndex) {
				byte rCurrent = paletteR[palIndex];
				byte gCurrent = paletteG[palIndex];
				byte bCurrent = paletteB[palIndex];

				int diff = ABS((int)r - (int)rCurrent) + ABS((int)g - (int)gCurrent) + ABS((int)b - (int)bCurrent);
				if (diff < difference) {
					difference = diff;
					foundIndex = palIndex;
				}
			}

			*lineDestP++ = foundIndex;
		}

		// Move to the start of the next line
		srcP += thumb16->w;
		destP += thumb16->w;
	}
}

} // End of namespace Hopkins