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
|
/* 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/textconsole.h"
namespace Agi {
int AgiEngine::allocObjects(int n) {
if ((_objects = (AgiObject *)calloc(n, sizeof(struct AgiObject))) == NULL)
return errNotEnoughMemory;
return errOK;
}
int AgiEngine::decodeObjects(uint8 *mem, uint32 flen) {
unsigned int i, so, padsize, spos;
padsize = _game.gameFlags & ID_AMIGA ? 4 : 3;
_game.numObjects = 0;
_objects = NULL;
// check if first pointer exceeds file size
// if so, its encrypted, else it is not
if (READ_LE_UINT16(mem) > flen) {
debugN(0, "Decrypting objects... ");
decrypt(mem, flen);
debug(0, "done.");
}
// alloc memory for object list
// byte 3 = number of animated objects. this is ignored.. ??
if (READ_LE_UINT16(mem) / padsize > 256) {
// die with no error! AGDS game needs not to die to work!! :(
return errOK;
}
_game.numObjects = READ_LE_UINT16(mem) / padsize;
debugC(5, kDebugLevelResources, "num_objects = %d (padsize = %d)", _game.numObjects, padsize);
if (allocObjects(_game.numObjects) != errOK)
return errNotEnoughMemory;
// build the object list
spos = getVersion() >= 0x2000 ? padsize : 0;
for (i = 0, so = spos; i < _game.numObjects; i++, so += padsize) {
int offset;
_objects[i].location = *(mem + so + 2);
offset = READ_LE_UINT16(mem + so) + spos;
if ((uint) offset < flen) {
_objects[i].name = (char *)strdup((const char *)mem + offset);
} else {
warning("object %i name beyond object filesize (%04x > %04x)", i, offset, flen);
_objects[i].name = strdup("");
}
// Don't show the invalid "?" object in ego's inventory in the fanmade
// game Beyond the Titanic 2 (bug #3116541).
if (!strcmp(_objects[i].name, "?") && _objects[i].location == EGO_OWNED)
_objects[i].location = 0;
}
debug(0, "Reading objects: %d objects read.", _game.numObjects);
return errOK;
}
int AgiEngine::loadObjects(const char *fname) {
Common::File fp;
debugC(5, kDebugLevelResources, "(Loading objects '%s')", fname);
if (!fp.open(fname))
return errBadFileOpen;
return readObjects(fp, fp.size());
}
/**
* Loads an object file that is in the common VOL resource format. Expects
* the file pointer to point to the last field in header, ie. file length.
* This is used at least by the V1 booter games.
*/
int AgiEngine::loadObjects(Common::File &fp) {
int flen = fp.readUint16LE();
return readObjects(fp, flen);
}
/**
* Read and decode objects, and store them in the internal structure.
*
* @param fp File pointer
* @param flen File length
*/
int AgiEngine::readObjects(Common::File &fp, int flen) {
uint8 *mem;
if ((mem = (uint8 *)calloc(1, flen + 32)) == NULL) {
fp.close();
return errNotEnoughMemory;
}
fp.read(mem, flen);
fp.close();
decodeObjects(mem, flen);
free(mem);
return errOK;
}
void AgiEngine::unloadObjects() {
unsigned int i;
if (_objects != NULL) {
for (i = 0; i < _game.numObjects; i++) {
free(_objects[i].name);
_objects[i].name = NULL;
}
free(_objects);
_objects = NULL;
}
}
void AgiEngine::objectSetLocation(uint16 objectNr, int i) {
if (objectNr >= _game.numObjects) {
warning("AgiEngine::objectSetLocation: Can't access object %d.\n", objectNr);
return;
}
_objects[objectNr].location = i;
}
int AgiEngine::objectGetLocation(uint16 objectNr) {
if (objectNr >= _game.numObjects) {
warning("AgiEngine::objectGetLocation: Can't access object %d.\n", objectNr);
return 0;
}
return _objects[objectNr].location;
}
const char *AgiEngine::objectName(uint16 objectNr) {
if (objectNr >= _game.numObjects) {
warning("AgiEngine::objectName: Can't access object %d.\n", objectNr);
return "";
}
return _objects[objectNr].name;
}
} // End of namespace Agi
|
