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
|
/* 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 "agi/agi.h"
#include "common/md5.h"
#define IMAGE_SIZE 368640 // = 40 * 2 * 9 * 512 = tracks * sides * sectors * sector size
#define SECTOR_OFFSET(s) ((s) * 512)
#define DDP_BASE_SECTOR 0x1C2
#define DDP_LOGDIR_SEC SECTOR_OFFSET(171) + 5
#define DDP_LOGDIR_MAX 43
#define DDP_PICDIR_SEC SECTOR_OFFSET(180) + 5
#define DDP_PICDIR_MAX 30
#define DDP_VIEWDIR_SEC SECTOR_OFFSET(189) + 5
#define DDP_VIEWDIR_MAX 171
#define DDP_SNDDIR_SEC SECTOR_OFFSET(198) + 5
#define DDP_SNDDIR_MAX 64
#define BC_LOGDIR_SEC SECTOR_OFFSET(90) + 5
#define BC_LOGDIR_MAX 118
#define BC_VIEWDIR_SEC SECTOR_OFFSET(96) + 5
#define BC_VIEWDIR_MAX 180
#define BC_PICDIR_SEC SECTOR_OFFSET(93) + 8
#define BC_PICDIR_MAX 117
#define BC_SNDDIR_SEC SECTOR_OFFSET(99) + 5
#define BC_SNDDIR_MAX 29
#define BC_WORDS SECTOR_OFFSET(0x26D) + 5
#define BC_OBJECTS SECTOR_OFFSET(0x1E6) + 3
namespace Agi {
AgiLoader_v1::AgiLoader_v1(AgiEngine *vm) {
_vm = vm;
}
int AgiLoader_v1::detectGame() {
// Find filenames for the disk images
_filenameDisk0 = _vm->getDiskName(BooterDisk1);
_filenameDisk1 = _vm->getDiskName(BooterDisk2);
return _vm->setupV2Game(_vm->getVersion());
}
int AgiLoader_v1::loadDir_DDP(AgiDir *agid, int offset, int max) {
Common::File fp;
if (!fp.open(_filenameDisk0))
return errBadFileOpen;
// Cleanup
for (int i = 0; i < MAX_DIRS; i++) {
agid[i].volume = 0xFF;
agid[i].offset = _EMPTY;
}
fp.seek(offset, SEEK_SET);
for (int i = 0; i <= max; i++) {
int b0 = fp.readByte();
int b1 = fp.readByte();
int b2 = fp.readByte();
if (b0 == 0xFF && b1 == 0xFF && b2 == 0xFF) {
agid[i].volume = 0xFF;
agid[i].offset = _EMPTY;
} else {
int sec = (DDP_BASE_SECTOR + (((b0 & 0xF) << 8) | b1)) >> 1;
int off = ((b1 & 0x1) << 8) | b2;
agid[i].volume = 0;
agid[i].offset = SECTOR_OFFSET(sec) + off;
}
}
fp.close();
return errOK;
}
int AgiLoader_v1::loadDir_BC(AgiDir *agid, int offset, int max) {
Common::File fp;
if (!fp.open(_filenameDisk0))
return errBadFileOpen;
// Cleanup
for (int i = 0; i < MAX_DIRS; i++) {
agid[i].volume = 0xFF;
agid[i].offset = _EMPTY;
}
fp.seek(offset, SEEK_SET);
for (int i = 0; i <= max; i++) {
int b0 = fp.readByte();
int b1 = fp.readByte();
int b2 = fp.readByte();
if (b0 == 0xFF && b1 == 0xFF && b2 == 0xFF) {
agid[i].volume = 0xFF;
agid[i].offset = _EMPTY;
} else {
int sec = (b0 & 0x3F) * 18 + ((b1 >> 1) & 0x1) * 9 + ((b1 >> 2) & 0x1F) - 1;
int off = ((b1 & 0x1) << 8) | b2;
int vol = (b0 & 0xC0) >> 6;
agid[i].volume = 0;
agid[i].offset = (vol == 2) * IMAGE_SIZE + SECTOR_OFFSET(sec) + off;
}
}
fp.close();
return errOK;
}
int AgiLoader_v1::init() {
int ec = errOK;
switch (_vm->getGameID()) {
case GID_DDP:
ec = loadDir_DDP(_vm->_game.dirLogic, DDP_LOGDIR_SEC, DDP_LOGDIR_MAX);
if (ec == errOK)
ec = loadDir_DDP(_vm->_game.dirPic, DDP_PICDIR_SEC, DDP_PICDIR_MAX);
if (ec == errOK)
ec = loadDir_DDP(_vm->_game.dirView, DDP_VIEWDIR_SEC, DDP_VIEWDIR_MAX);
if (ec == errOK)
ec = loadDir_DDP(_vm->_game.dirSound, DDP_SNDDIR_SEC, DDP_SNDDIR_MAX);
break;
case GID_BC:
ec = loadDir_BC(_vm->_game.dirLogic, BC_LOGDIR_SEC, BC_LOGDIR_MAX);
if (ec == errOK)
ec = loadDir_BC(_vm->_game.dirPic, BC_PICDIR_SEC, BC_PICDIR_MAX);
if (ec == errOK)
ec = loadDir_BC(_vm->_game.dirView, BC_VIEWDIR_SEC, BC_VIEWDIR_MAX);
if (ec == errOK)
ec = loadDir_BC(_vm->_game.dirSound, BC_SNDDIR_SEC, BC_SNDDIR_MAX);
break;
}
return ec;
}
int AgiLoader_v1::deinit() {
int ec = errOK;
return ec;
}
uint8 *AgiLoader_v1::loadVolRes(struct AgiDir *agid) {
uint8 *data = NULL;
Common::File fp;
int offset = agid->offset;
if (offset == _EMPTY)
return NULL;
if (offset > IMAGE_SIZE) {
fp.open(_filenameDisk1);
offset -= IMAGE_SIZE;
} else {
fp.open(_filenameDisk0);
}
fp.seek(offset, SEEK_SET);
int signature = fp.readUint16BE();
if (signature != 0x1234) {
warning("AgiLoader_v1::loadVolRes: bad signature %04x", signature);
return NULL;
}
fp.readByte();
agid->len = fp.readUint16LE();
data = (uint8 *)calloc(1, agid->len + 32);
fp.read(data, agid->len);
fp.close();
return data;
}
int AgiLoader_v1::loadResource(int t, int n) {
int ec = errOK;
uint8 *data = NULL;
debugC(3, kDebugLevelResources, "(t = %d, n = %d)", t, n);
if (n >= MAX_DIRS)
return errBadResource;
switch (t) {
case rLOGIC:
if (~_vm->_game.dirLogic[n].flags & RES_LOADED) {
debugC(3, kDebugLevelResources, "loading logic resource %d", n);
unloadResource(rLOGIC, n);
// load raw resource into data
data = loadVolRes(&_vm->_game.dirLogic[n]);
_vm->_game.logics[n].data = data;
ec = data ? _vm->decodeLogic(n) : errBadResource;
_vm->_game.logics[n].sIP = 2;
}
// if logic was cached, we get here
// reset code pointers incase it was cached
_vm->_game.logics[n].cIP = _vm->_game.logics[n].sIP;
break;
case rPICTURE:
// if picture is currently NOT loaded *OR* cacheing is off,
// unload the resource (caching == off) and reload it
debugC(3, kDebugLevelResources, "loading picture resource %d", n);
if (_vm->_game.dirPic[n].flags & RES_LOADED)
break;
// if loaded but not cached, unload it
// if cached but not loaded, etc
unloadResource(rPICTURE, n);
data = loadVolRes(&_vm->_game.dirPic[n]);
if (data != NULL) {
_vm->_game.pictures[n].rdata = data;
_vm->_game.dirPic[n].flags |= RES_LOADED;
} else {
ec = errBadResource;
}
break;
case rSOUND:
debugC(3, kDebugLevelResources, "loading sound resource %d", n);
if (_vm->_game.dirSound[n].flags & RES_LOADED)
break;
data = loadVolRes(&_vm->_game.dirSound[n]);
if (data != NULL) {
// Freeing of the raw resource from memory is delegated to the createFromRawResource-function
_vm->_game.sounds[n] = AgiSound::createFromRawResource(data, _vm->_game.dirSound[n].len, n, _vm->_soundemu);
_vm->_game.dirSound[n].flags |= RES_LOADED;
} else {
ec = errBadResource;
}
break;
case rVIEW:
// Load a VIEW resource into memory...
// Since VIEWS alter the view table ALL the time
// can we cache the view? or must we reload it all
// the time?
if (_vm->_game.dirView[n].flags & RES_LOADED)
break;
debugC(3, kDebugLevelResources, "loading view resource %d", n);
unloadResource(rVIEW, n);
data = loadVolRes(&_vm->_game.dirView[n]);
if (data) {
_vm->_game.views[n].rdata = data;
_vm->_game.dirView[n].flags |= RES_LOADED;
ec = _vm->decodeView(n);
} else {
ec = errBadResource;
}
break;
default:
ec = errBadResource;
break;
}
return ec;
}
int AgiLoader_v1::unloadResource(int t, int n) {
switch (t) {
case rLOGIC:
_vm->unloadLogic(n);
break;
case rPICTURE:
_vm->_picture->unloadPicture(n);
break;
case rVIEW:
_vm->unloadView(n);
break;
case rSOUND:
_vm->_sound->unloadSound(n);
break;
}
return errOK;
}
int AgiLoader_v1::loadObjects(const char *fname) {
if (_vm->getGameID() == GID_BC) {
Common::File f;
f.open(_filenameDisk0);
f.seek(BC_OBJECTS, SEEK_SET);
return _vm->loadObjects(f);
}
return errOK;
}
int AgiLoader_v1::loadWords(const char *fname) {
if (_vm->getGameID() == GID_BC) {
Common::File f;
f.open(_filenameDisk0);
f.seek(BC_WORDS, SEEK_SET);
return _vm->loadWords_v1(f);
}
return errOK;
}
}
|
