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
|
/**************************************************************************/
/* */
/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/. */
/* */
/* NXCOMP, NX protocol compression and NX extensions to this software */
/* are copyright of NoMachine. Redistribution and use of the present */
/* software is allowed according to terms specified in the file LICENSE */
/* which comes in the source distribution. */
/* */
/* Check http://www.nomachine.com/licensing.html for applicability. */
/* */
/* NX and NoMachine are trademarks of NoMachine S.r.l. */
/* */
/* All rights reserved. */
/* */
/**************************************************************************/
#include "Misc.h"
#include "Unpack.h"
#define PANIC
#define WARNING
#undef TEST
#undef DEBUG
int UnpackAlpha(unsigned char method, unsigned char *src_data, int src_size,
unsigned char *dst_data, int dst_size)
{
if (*src_data == 0)
{
if (dst_size != src_size - 1)
{
#ifdef TEST
*logofs << "UnpackAlpha: PANIC! Invalid destination size "
<< dst_size << " with source " << src_size
<< ".\n" << logofs_flush;
#endif
return -1;
}
#ifdef TEST
*logofs << "UnpackAlpha: Expanding " << src_size - 1
<< " bytes of plain alpha data.\n" << logofs_flush;
#endif
memcpy(dst_data, src_data + 1, src_size - 1);
return 1;
}
unsigned int check_size = dst_size;
int result = ZDecompress(&unpackStream, dst_data, &check_size,
src_data + 1, src_size - 1);
if (result != Z_OK)
{
#ifdef PANIC
*logofs << "UnpackAlpha: PANIC! Failure decompressing alpha data. "
<< "Error is '" << zError(result) << "'.\n"
<< logofs_flush;
#endif
cerr << "Error" << ": Failure decompressing alpha data. "
<< "Error is '" << zError(result) << "'.\n";
return -1;
}
else if (check_size != (unsigned int) dst_size)
{
#ifdef PANIC
*logofs << "UnpackAlpha: PANIC! Size mismatch in alpha data. "
<< "Resulting size is " << check_size << " with "
<< "expected size " << dst_size << ".\n"
<< logofs_flush;
#endif
cerr << "Error" << ": Size mismatch in alpha data. "
<< "Resulting size is " << check_size << " with "
<< "expected size " << dst_size << ".\n";
return -1;
}
#ifdef TEST
*logofs << "UnpackAlpha: Decompressed " << src_size - 1
<< " bytes to " << dst_size << " bytes of alpha data.\n"
<< logofs_flush;
#endif
return 1;
}
int UnpackAlpha(T_alpha *alpha, unsigned char *dst_data,
int dst_size, int big_endian)
{
unsigned int count = dst_size >> 2;
unsigned int i;
int shift;
if (count != alpha -> entries)
{
#ifdef WARNING
*logofs << "UnpackAlpha: WARNING! Not applying the alpha with "
<< count << " elements needed and " << alpha -> entries
<< " available.\n" << logofs_flush;
#endif
return 0;
}
shift = (big_endian == 1 ? 0 : 3);
for (i = 0; i < count; i++)
{
*(dst_data + shift) = *(alpha -> data + i);
dst_data += 4;
}
return 1;
}
|
