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
|
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef _CCIDECOM_HXX
#define _CCIDECOM_HXX
#include <tools/stream.hxx>
#define CCI_OPTION_2D 1 // 2D-Komprimierung (statt 1D)
#define CCI_OPTION_EOL 2 // EOL-Codes am Ende jeder Zeile vorhanden
#define CCI_OPTION_BYTEALIGNEOL 4 // Fuellbits vor jedem EOL-Code, so dass
// Ende von EOL auf Bytes aligend
#define CCI_OPTION_BYTEALIGNROW 8 // Rows beginnen immer auf Byte-Grenze
#define CCI_OPTION_INVERSEBITORDER 16
// Eintrag in eine Huffman-Tabelle:
struct CCIHuffmanTableEntry {
sal_uInt16 nValue; // Der Daten-Wert.
sal_uInt16 nCode; // Der Code durch den der Daten-Wert repraesentiert wird.
sal_uInt16 nCodeBits; // Laenge des Codes in Bits.
};
// Eintrag in eine Hash-Tabelle zur schnellen Dekodierung
struct CCILookUpTableEntry {
sal_uInt16 nValue;
sal_uInt16 nCodeBits;
};
class CCIDecompressor {
public:
CCIDecompressor( sal_uLong nOptions, sal_uInt32 nImageWidth );
~CCIDecompressor();
void StartDecompression( SvStream & rIStream );
sal_Bool DecompressScanline(sal_uInt8 * pTarget, sal_uLong nTargetBits );
private:
void MakeLookUp(const CCIHuffmanTableEntry * pHufTab,
const CCIHuffmanTableEntry * pHufTabSave,
CCILookUpTableEntry * pLookUp,
sal_uInt16 nHuffmanTableSize,
sal_uInt16 nMaxCodeBits);
sal_Bool ReadEOL( sal_uInt32 nMaxFillBits );
sal_Bool Read2DTag();
sal_uInt8 ReadBlackOrWhite();
sal_uInt16 ReadCodeAndDecode(const CCILookUpTableEntry * pLookUp,
sal_uInt16 nMaxCodeBits);
void FillBits(sal_uInt8 * pTarget, sal_uInt16 nTargetBits,
sal_uInt16 nBitPos, sal_uInt16 nNumBits,
sal_uInt8 nBlackOrWhite);
sal_uInt16 CountBits(const sal_uInt8 * pData, sal_uInt16 nDataSizeBits,
sal_uInt16 nBitPos, sal_uInt8 nBlackOrWhite);
void Read1DScanlineData(sal_uInt8 * pTarget, sal_uInt16 nTargetBits);
void Read2DScanlineData(sal_uInt8 * pTarget, sal_uInt16 nTargetBits);
sal_Bool bTableBad;
sal_Bool bStatus;
sal_uInt8* pByteSwap;
SvStream * pIStream;
sal_uInt32 nEOLCount;
sal_uInt32 nWidth;
sal_uLong nOptions;
sal_Bool bFirstEOL;
CCILookUpTableEntry * pWhiteLookUp;
CCILookUpTableEntry * pBlackLookUp;
CCILookUpTableEntry * p2DModeLookUp;
CCILookUpTableEntry * pUncompLookUp;
sal_uLong nInputBitsBuf;
sal_uInt16 nInputBitsBufSize;
sal_uInt8 * pLastLine;
sal_uLong nLastLineSize;
};
#endif
|
