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
|
/* Copyright (C) 1994-2003 Revolution Software Ltd
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*/
#include "stdafx.h"
#include "sword2/sword2.h"
#include "sword2/console.h"
#include "sword2/defs.h"
#include "sword2/header.h"
#include "sword2/memory.h"
#include "sword2/protocol.h"
#include "sword2/resman.h"
namespace Sword2 {
/**
* Returns a pointer to the first palette entry, given the pointer to the start
* of the screen file.
*/
uint8 *Sword2Engine::fetchPalette(uint8 *screenFile) {
uint8 *palette;
_multiScreenHeader *mscreenHeader = (_multiScreenHeader *) (screenFile + sizeof(_standardHeader));
palette = (uint8 *) mscreenHeader + mscreenHeader->palette;
// Always set colour 0 to black, because while most background screen
// palettes have a bright colour 0 it should come out as black in the
// game.
palette[0] = 0;
palette[1] = 0;
palette[2] = 0;
palette[3] = 0;
return palette;
}
/**
* Returns a pointer to the start of the palette match table, given the pointer
* to the start of the screen file.
*/
uint8 *Sword2Engine::fetchPaletteMatchTable(uint8 *screenFile) {
_multiScreenHeader *mscreenHeader = (_multiScreenHeader *) (screenFile + sizeof(_standardHeader));
return (uint8 *) mscreenHeader + mscreenHeader->paletteTable;
}
/**
* Returns a pointer to the screen header, given the pointer to the start of
* the screen file.
*/
_screenHeader *Sword2Engine::fetchScreenHeader(uint8 *screenFile) {
_multiScreenHeader *mscreenHeader = (_multiScreenHeader *) (screenFile + sizeof(_standardHeader));
_screenHeader *screenHeader = (_screenHeader*) ((uint8 *) mscreenHeader + mscreenHeader->screen);
return screenHeader;
}
/**
* Returns a pointer to the requested layer header, given the pointer to the
* start of the screen file. Drops out if the requested layer number exceeds
* the number of layers on this screen.
*/
_layerHeader *Sword2Engine::fetchLayerHeader(uint8 *screenFile, uint16 layerNo) {
#ifdef _SWORD2_DEBUG
_screenHeader *screenHead = fetchScreenHeader(screenFile);
if (layerNo > screenHead->noLayers - 1)
error("fetchLayerHeader(%d) invalid layer number!", layerNo);
#endif
_multiScreenHeader *mscreenHeader = (_multiScreenHeader *) (screenFile + sizeof(_standardHeader));
_layerHeader *layerHeader = (_layerHeader *) ((uint8 *) mscreenHeader + mscreenHeader->layers + (layerNo * sizeof(_layerHeader)));
return layerHeader;
}
/**
* Returns a pointer to the start of the shading mask, given the pointer to the
* start of the screen file.
*/
uint8 *Sword2Engine::fetchShadingMask(uint8 *screenFile) {
_multiScreenHeader *mscreenHeader = (_multiScreenHeader *) (screenFile + sizeof(_standardHeader));
return (uint8 *) mscreenHeader + mscreenHeader->maskOffset;
}
/**
* Returns a pointer to the anim header, given the pointer to the start of the
* anim file.
*/
_animHeader *Sword2Engine::fetchAnimHeader(uint8 *animFile) {
return (_animHeader *) (animFile + sizeof(_standardHeader));
}
/**
* Returns a pointer to the requested frame number's cdtEntry, given the
* pointer to the start of the anim file. Drops out if the requested frame
* number exceeds the number of frames in this anim.
*/
_cdtEntry *Sword2Engine::fetchCdtEntry(uint8 *animFile, uint16 frameNo) {
_animHeader *animHead = fetchAnimHeader(animFile);
#ifdef _SWORD2_DEBUG
if (frameNo > animHead->noAnimFrames - 1)
error("fetchCdtEntry(animFile,%d) - anim only %d frames", frameNo, animHead->noAnimFrames);
#endif
return (_cdtEntry *) ((uint8 *) animHead + sizeof(_animHeader) + frameNo * sizeof(_cdtEntry));
}
/**
* Returns a pointer to the requested frame number's header, given the pointer
* to the start of the anim file. Drops out if the requested frame number
* exceeds the number of frames in this anim
*/
_frameHeader *Sword2Engine::fetchFrameHeader(uint8 *animFile, uint16 frameNo) {
// required address = (address of the start of the anim header) + frameOffset
return (_frameHeader *) (animFile + sizeof(_standardHeader) + fetchCdtEntry(animFile, frameNo)->frameOffset);
}
/**
* Returns a pointer to the requested parallax layer data.
*/
_parallax *Sword2Engine::fetchBackgroundParallaxLayer(uint8 *screenFile, int layer) {
_multiScreenHeader *mscreenHeader = (_multiScreenHeader *) (screenFile + sizeof(_standardHeader));
#ifdef _SWORD2_DEBUG
if (mscreenHeader->bg_parallax[layer] == 0)
error("fetchBackgroundParallaxLayer(%d) - No parallax layer exists", layer);
#endif
return (_parallax *) ((uint8 *) mscreenHeader + mscreenHeader->bg_parallax[layer]);
}
_parallax *Sword2Engine::fetchBackgroundLayer(uint8 *screenFile) {
_multiScreenHeader *mscreenHeader = (_multiScreenHeader *) (screenFile + sizeof(_standardHeader));
#ifdef _SWORD2_DEBUG
if (mscreenHeader->screen == 0)
error("fetchBackgroundLayer (%d) - No background layer exists");
#endif
return (_parallax *) ((uint8 *) mscreenHeader + mscreenHeader->screen + sizeof(_screenHeader));
}
_parallax *Sword2Engine::fetchForegroundParallaxLayer(uint8 *screenFile, int layer) {
_multiScreenHeader *mscreenHeader = (_multiScreenHeader *) (screenFile + sizeof(_standardHeader));
#ifdef _SWORD2_DEBUG
if (mscreenHeader->fg_parallax[layer] == 0)
error("fetchForegroundParallaxLayer(%d) - No parallax layer exists", layer);
#endif
return (_parallax *) ((uint8 *) mscreenHeader + mscreenHeader->fg_parallax[layer]);
}
uint8 errorLine[128];
uint8 *Sword2Engine::fetchTextLine(uint8 *file, uint32 text_line) {
_standardHeader *fileHeader;
uint32 *point;
_textHeader *text_header = (_textHeader *) (file + sizeof(_standardHeader));
if (text_line >= text_header->noOfLines) {
fileHeader = (_standardHeader*)file;
sprintf((char *) errorLine, "xxMissing line %d of %s (only 0..%d)", text_line, fileHeader->name, text_header->noOfLines - 1);
// first 2 chars are NULL so that actor-number comes out as '0'
errorLine[0] = 0;
errorLine[1] = 0;
return errorLine;
}
// point to the lookup table
point = (uint32 *) text_header + 1;
return (uint8 *) (file + READ_LE_UINT32(point + text_line));
}
// Used for testing text & speech (see fnISpeak in speech.cpp)
uint8 Sword2Engine::checkTextLine(uint8 *file, uint32 text_line) {
_textHeader *text_header = (_textHeader *) (file + sizeof(_standardHeader));
// out of range => invalid
if (text_line >= text_header->noOfLines)
return 0;
// valid
return 1;
}
uint8 *Sword2Engine::fetchObjectName(int32 resourceId) {
_standardHeader *header;
header = (_standardHeader *) res_man->openResource(resourceId);
res_man->closeResource(resourceId);
// note this pointer is no longer valid, but it should be ok until
// another resource is opened!
// FIXME: I don't like the sound of this at all. Though thanks to the
// BS2 memory manager, at least it will still point to malloced
// memory.
return header->name;
}
} // End of namespace Sword2
|
