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21 
22 
23 
24 #ifndef _CCIDECOM_HXX
25 #define _CCIDECOM_HXX
26 
27 #include <tools/stream.hxx>
28 
29 
30 #define CCI_OPTION_2D				1		// 2D-Komprimierung (statt 1D)
31 #define CCI_OPTION_EOL				2		// EOL-Codes am Ende jeder Zeile vorhanden
32 #define CCI_OPTION_BYTEALIGNEOL		4		// Fuellbits vor jedem EOL-Code, so dass
33 											// Ende von EOL auf Bytes aligend
34 #define CCI_OPTION_BYTEALIGNROW		8		// Rows beginnen immer auf Byte-Grenze
35 #define CCI_OPTION_INVERSEBITORDER	16
36 
37 // Eintrag in eine Huffman-Tabelle:
38 struct CCIHuffmanTableEntry {
39 	sal_uInt16 nValue;    // Der Daten-Wert.
40 	sal_uInt16 nCode;     // Der Code durch den der Daten-Wert repraesentiert wird.
41 	sal_uInt16 nCodeBits; // Laenge des Codes in Bits.
42 };
43 
44 
45 // Eintrag in eine Hash-Tabelle zur schnellen Dekodierung
46 struct CCILookUpTableEntry {
47 	sal_uInt16 nValue;
48 	sal_uInt16 nCodeBits;
49 };
50 
51 
52 class CCIDecompressor {
53 
54 public:
55 
56 	CCIDecompressor( sal_uLong nOptions, sal_uInt32 nImageWidth );
57 	~CCIDecompressor();
58 
59 	void StartDecompression( SvStream & rIStream );
60 
61 	sal_Bool DecompressScanline(sal_uInt8 * pTarget, sal_uLong nTargetBits );
62 
63 private:
64 
65 	void MakeLookUp(const CCIHuffmanTableEntry * pHufTab,
66 					const CCIHuffmanTableEntry * pHufTabSave,
67 					CCILookUpTableEntry * pLookUp,
68 					sal_uInt16 nHuffmanTableSize,
69 					sal_uInt16 nMaxCodeBits);
70 
71 	sal_Bool ReadEOL( sal_uInt32 nMaxFillBits );
72 
73 	sal_Bool Read2DTag();
74 
75 	sal_uInt8 ReadBlackOrWhite();
76 
77 	sal_uInt16 ReadCodeAndDecode(const CCILookUpTableEntry * pLookUp,
78 							 sal_uInt16 nMaxCodeBits);
79 
80 	void FillBits(sal_uInt8 * pTarget, sal_uInt16 nTargetBits,
81 				  sal_uInt16 nBitPos, sal_uInt16 nNumBits,
82 				  sal_uInt8 nBlackOrWhite);
83 
84 	sal_uInt16 CountBits(const sal_uInt8 * pData, sal_uInt16 nDataSizeBits,
85 					 sal_uInt16 nBitPos, sal_uInt8 nBlackOrWhite);
86 
87 	void Read1DScanlineData(sal_uInt8 * pTarget, sal_uInt16 nTargetBits);
88 
89 	void Read2DScanlineData(sal_uInt8 * pTarget, sal_uInt16 nTargetBits);
90 
91 	sal_Bool bTableBad;
92 
93 	sal_Bool bStatus;
94 
95 	sal_uInt8* pByteSwap;
96 
97 	SvStream * pIStream;
98 
99 	sal_uInt32 nEOLCount;
100 
101 	sal_uInt32 nWidth;
102 
103 	sal_uLong nOptions;
104 
105 	sal_Bool bFirstEOL;
106 
107 	CCILookUpTableEntry * pWhiteLookUp;
108 	CCILookUpTableEntry * pBlackLookUp;
109 	CCILookUpTableEntry * p2DModeLookUp;
110 	CCILookUpTableEntry * pUncompLookUp;
111 
112 	sal_uLong nInputBitsBuf;
113 	sal_uInt16 nInputBitsBufSize;
114 
115 	sal_uInt8 * pLastLine;
116 	sal_uLong nLastLineSize;
117 };
118 
119 
120 #endif
121 
122