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
|
/* ScummVM - Scumm Interpreter
* Copyright (C) 2004 Ivan Dubrov
* Copyright (C) 2004-2006 The ScummVM project
*
* 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.
*
* $URL$
* $Id$
*
*/
#include "common/stdafx.h"
#include "common/endian.h"
#include "gob/gob.h"
#include "gob/video.h"
namespace Gob {
Video_v2::Video_v2(GobEngine *vm) : Video_v1(vm) {
}
char Video_v2::spriteUncompressor(byte *sprBuf, int16 srcWidth, int16 srcHeight,
int16 x, int16 y, int16 transp, SurfaceDesc *destDesc) {
byte *memBuffer;
byte *srcPtr, *destPtr, *linePtr;
byte temp;
uint32 sourceLeft;
uint16 cmdVar;
int16 curWidth, curHeight;
int16 offset;
int16 counter2;
int16 bufPos;
int16 strLen;
int16 lenCmd;
if (!destDesc)
return 1;
_vm->validateVideoMode(destDesc->_vidMode);
if (sprBuf[0] != 1)
return 0;
if (sprBuf[1] != 2)
return 0;
if (sprBuf[2] == 2) {
SurfaceDesc sourceDesc(0x13, srcWidth, srcHeight, sprBuf + 3);
Video::drawSprite(&sourceDesc, destDesc, 0, 0, srcWidth - 1,
srcHeight - 1, x, y, transp);
return 1;
} else if (sprBuf[2] == 1) {
memBuffer = new byte[4370];
assert(memBuffer);
srcPtr = sprBuf + 3;
sourceLeft = READ_LE_UINT32(srcPtr);
destPtr = destDesc->getVidMem() + destDesc->getWidth() * y + x;
curWidth = 0;
curHeight = 0;
linePtr = destPtr;
srcPtr += 4;
if ((READ_LE_UINT16(srcPtr) == 0x1234) && (READ_LE_UINT16(srcPtr + 2) == 0x5678)) {
srcPtr += 4;
bufPos = 273;
lenCmd = 18;
} else {
lenCmd = 100;
bufPos = 4078;
}
memset(memBuffer, 32, bufPos);
cmdVar = 0;
while (1) {
cmdVar >>= 1;
if ((cmdVar & 0x100) == 0) {
cmdVar = *srcPtr | 0xFF00;
srcPtr++;
}
if ((cmdVar & 1) != 0) {
temp = *srcPtr++;
if ((temp != 0) || (transp == 0))
*destPtr = temp;
destPtr++;
curWidth++;
if (curWidth >= srcWidth) {
curWidth = 0;
linePtr += destDesc->getWidth();
destPtr = linePtr;
curHeight++;
if (curHeight >= srcHeight)
break;
}
sourceLeft--;
memBuffer[bufPos] = temp;
bufPos++;
bufPos %= 4096;
if (sourceLeft == 0)
break;
} else {
offset = *srcPtr++;
offset |= (*srcPtr & 0xF0) << 4;
strLen = (*srcPtr & 0x0F) + 3;
*srcPtr++;
if (strLen == lenCmd)
strLen = *srcPtr++ + 18;
for (counter2 = 0; counter2 < strLen; counter2++) {
temp = memBuffer[(offset + counter2) % 4096];
if ((temp != 0) || (transp == 0))
*destPtr = temp;
destPtr++;
curWidth++;
if (curWidth >= srcWidth) {
curWidth = 0;
linePtr += destDesc->getWidth();
destPtr = linePtr;
curHeight++;
if (curHeight >= srcHeight) {
delete[] memBuffer;
return 1;
}
}
memBuffer[bufPos] = temp;
bufPos++;
bufPos %= 4096;
}
if (strLen >= ((int32) sourceLeft)) {
delete[] memBuffer;
return 1;
} else
sourceLeft--;
}
}
} else
return 0;
delete[] memBuffer;
return 1;
}
} // End of namespace Gob
|
