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Constantin Kaplinskya2adc8d2006-05-25 05:01:55 +00001/* Copyright (C) 2000-2003 Constantin Kaplinsky. All Rights Reserved.
Peter Åstrandd69bcc42011-09-28 12:52:53 +00002 * Copyright 2004-2005 Cendio AB.
DRC33c15e32011-11-03 18:49:21 +00003 * Copyright (C) 2011 D. R. Commander. All Rights Reserved.
Constantin Kaplinskya2adc8d2006-05-25 05:01:55 +00004 *
5 * This is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This software is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this software; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
18 * USA.
19 */
20#include <rfb/CMsgReader.h>
Pierre Ossman668468b2014-01-31 12:37:32 +010021#include <rfb/CConnection.h>
Constantin Kaplinskya2adc8d2006-05-25 05:01:55 +000022#include <rfb/CMsgHandler.h>
23#include <rfb/TightDecoder.h>
Constantin Kaplinskya2adc8d2006-05-25 05:01:55 +000024
25using namespace rfb;
26
Constantin Kaplinskya2adc8d2006-05-25 05:01:55 +000027#define TIGHT_MAX_WIDTH 2048
28
Constantin Kaplinskya2adc8d2006-05-25 05:01:55 +000029#define BPP 8
30#include <rfb/tightDecode.h>
31#undef BPP
32#define BPP 16
33#include <rfb/tightDecode.h>
34#undef BPP
35#define BPP 32
36#include <rfb/tightDecode.h>
37#undef BPP
38
Pierre Ossman668468b2014-01-31 12:37:32 +010039TightDecoder::TightDecoder(CConnection* conn) : Decoder(conn)
Constantin Kaplinskya2adc8d2006-05-25 05:01:55 +000040{
41}
42
43TightDecoder::~TightDecoder()
44{
45}
46
47void TightDecoder::readRect(const Rect& r, CMsgHandler* handler)
48{
Pierre Ossman668468b2014-01-31 12:37:32 +010049 is = conn->getInStream();
DRC33c15e32011-11-03 18:49:21 +000050 this->handler = handler;
51 clientpf = handler->getPreferredPF();
52 serverpf = handler->cp.pf();
Constantin Kaplinskya2adc8d2006-05-25 05:01:55 +000053
DRC33c15e32011-11-03 18:49:21 +000054 if (clientpf.equal(serverpf)) {
55 /* Decode directly into the framebuffer (fast path) */
56 directDecode = true;
Constantin Kaplinskya2adc8d2006-05-25 05:01:55 +000057 } else {
DRC33c15e32011-11-03 18:49:21 +000058 /* Decode into an intermediate buffer and use pixel translation */
59 directDecode = false;
Constantin Kaplinskya2adc8d2006-05-25 05:01:55 +000060 }
Constantin Kaplinskya2adc8d2006-05-25 05:01:55 +000061
DRC33c15e32011-11-03 18:49:21 +000062 switch (serverpf.bpp) {
63 case 8:
64 tightDecode8 (r); break;
65 case 16:
66 tightDecode16(r); break;
67 case 32:
68 tightDecode32(r); break;
69 }
Constantin Kaplinskya2adc8d2006-05-25 05:01:55 +000070}
Pierre Ossman7b5c0692014-03-17 14:35:51 +010071
72rdr::U32 TightDecoder::readCompact(rdr::InStream* is)
73{
74 rdr::U8 b;
75 rdr::U32 result;
76
77 b = is->readU8();
78 result = (int)b & 0x7F;
79 if (b & 0x80) {
80 b = is->readU8();
81 result |= ((int)b & 0x7F) << 7;
82 if (b & 0x80) {
83 b = is->readU8();
84 result |= ((int)b & 0xFF) << 14;
85 }
86 }
87
88 return result;
89}