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
|
/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
* Copyright 2009-2017 Pierre Ossman for Cendio AB
*
* This 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 software 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 software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#include <rdr/InStream.h>
#include <rdr/MemInStream.h>
#include <rdr/OutStream.h>
#include <rfb/Exception.h>
#include <rfb/ServerParams.h>
#include <rfb/PixelBuffer.h>
#include <rfb/ZRLEDecoder.h>
using namespace rfb;
static inline rdr::U32 readOpaque24A(rdr::InStream* is)
{
rdr::U32 r=0;
((rdr::U8*)&r)[0] = is->readU8();
((rdr::U8*)&r)[1] = is->readU8();
((rdr::U8*)&r)[2] = is->readU8();
return r;
}
static inline rdr::U32 readOpaque24B(rdr::InStream* is)
{
rdr::U32 r=0;
((rdr::U8*)&r)[1] = is->readU8();
((rdr::U8*)&r)[2] = is->readU8();
((rdr::U8*)&r)[3] = is->readU8();
return r;
}
static inline void zlibHasData(rdr::ZlibInStream* zis, size_t length)
{
if (!zis->hasData(length))
throw Exception("ZRLE decode error");
}
#define BPP 8
#include <rfb/zrleDecode.h>
#undef BPP
#define BPP 16
#include <rfb/zrleDecode.h>
#undef BPP
#define BPP 32
#include <rfb/zrleDecode.h>
#define CPIXEL 24A
#include <rfb/zrleDecode.h>
#undef CPIXEL
#define CPIXEL 24B
#include <rfb/zrleDecode.h>
#undef CPIXEL
#undef BPP
ZRLEDecoder::ZRLEDecoder() : Decoder(DecoderOrdered)
{
}
ZRLEDecoder::~ZRLEDecoder()
{
}
bool ZRLEDecoder::readRect(const Rect& r, rdr::InStream* is,
const ServerParams& server, rdr::OutStream* os)
{
rdr::U32 len;
if (!is->hasData(4))
return false;
is->setRestorePoint();
len = is->readU32();
os->writeU32(len);
if (!is->hasDataOrRestore(len))
return false;
is->clearRestorePoint();
os->copyBytes(is, len);
return true;
}
void ZRLEDecoder::decodeRect(const Rect& r, const void* buffer,
size_t buflen, const ServerParams& server,
ModifiablePixelBuffer* pb)
{
rdr::MemInStream is(buffer, buflen);
const rfb::PixelFormat& pf = server.pf();
switch (pf.bpp) {
case 8: zrleDecode8 (r, &is, &zis, pf, pb); break;
case 16: zrleDecode16(r, &is, &zis, pf, pb); break;
case 32:
{
if (pf.depth <= 24) {
Pixel maxPixel = pf.pixelFromRGB((rdr::U16)-1, (rdr::U16)-1, (rdr::U16)-1);
bool fitsInLS3Bytes = maxPixel < (1<<24);
bool fitsInMS3Bytes = (maxPixel & 0xff) == 0;
if ((fitsInLS3Bytes && pf.isLittleEndian()) ||
(fitsInMS3Bytes && pf.isBigEndian()))
{
zrleDecode24A(r, &is, &zis, pf, pb);
break;
}
if ((fitsInLS3Bytes && pf.isBigEndian()) ||
(fitsInMS3Bytes && pf.isLittleEndian()))
{
zrleDecode24B(r, &is, &zis, pf, pb);
break;
}
}
zrleDecode32(r, &is, &zis, pf, pb);
break;
}
}
}
|
