1 /* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
2 *
3 * This is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or
6 * (at your option) any later version.
7 *
8 * This software is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this software; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
16 * USA.
17 */
18
19 #include <rdr/InStream.h>
20 #include <rdr/MemInStream.h>
21 #include <rdr/OutStream.h>
22
23 #include <rfb/ServerParams.h>
24 #include <rfb/PixelBuffer.h>
25 #include <rfb/RREDecoder.h>
26
27 using namespace rfb;
28
29 #define BPP 8
30 #include <rfb/rreDecode.h>
31 #undef BPP
32 #define BPP 16
33 #include <rfb/rreDecode.h>
34 #undef BPP
35 #define BPP 32
36 #include <rfb/rreDecode.h>
37 #undef BPP
38
RREDecoder()39 RREDecoder::RREDecoder() : Decoder(DecoderPlain)
40 {
41 }
42
~RREDecoder()43 RREDecoder::~RREDecoder()
44 {
45 }
46
readRect(const Rect & r,rdr::InStream * is,const ServerParams & server,rdr::OutStream * os)47 bool RREDecoder::readRect(const Rect& r, rdr::InStream* is,
48 const ServerParams& server, rdr::OutStream* os)
49 {
50 rdr::U32 numRects;
51 size_t len;
52
53 if (!is->hasData(4))
54 return false;
55
56 is->setRestorePoint();
57
58 numRects = is->readU32();
59 os->writeU32(numRects);
60
61 len = server.pf().bpp/8 + numRects * (server.pf().bpp/8 + 8);
62
63 if (!is->hasDataOrRestore(len))
64 return false;
65
66 is->clearRestorePoint();
67
68 os->copyBytes(is, len);
69
70 return true;
71 }
72
decodeRect(const Rect & r,const void * buffer,size_t buflen,const ServerParams & server,ModifiablePixelBuffer * pb)73 void RREDecoder::decodeRect(const Rect& r, const void* buffer,
74 size_t buflen, const ServerParams& server,
75 ModifiablePixelBuffer* pb)
76 {
77 rdr::MemInStream is(buffer, buflen);
78 const PixelFormat& pf = server.pf();
79 switch (pf.bpp) {
80 case 8: rreDecode8 (r, &is, pf, pb); break;
81 case 16: rreDecode16(r, &is, pf, pb); break;
82 case 32: rreDecode32(r, &is, pf, pb); break;
83 }
84 }
85