xref: /trunk/main/svtools/source/filter/igif/decode.hxx (revision 01aa44aa)
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21 
22 
23 
24 #ifndef _DECODE_HXX
25 #define _DECODE_HXX
26 
27 #ifndef _BMPACC_HXX
28 #include <vcl/bmpacc.hxx>
29 #endif
30 
31 struct GIFLZWTableEntry;
32 
33 class GIFLZWDecompressor
34 {
35 	GIFLZWTableEntry*	pTable;
36 	HPBYTE				pOutBuf;
37 	HPBYTE				pOutBufData;
38 	HPBYTE				pBlockBuf;
39 	sal_uLong				nInputBitsBuf;
40 	sal_uInt16				nTableSize;
41 	sal_uInt16				nClearCode;
42 	sal_uInt16				nEOICode;
43 	sal_uInt16				nCodeSize;
44 	sal_uInt16				nOldCode;
45 	sal_uInt16				nOutBufDataLen;
46 	sal_uInt16				nInputBitsBufSize;
47 	sal_Bool				bEOIFound;
48 	sal_uInt8				nDataSize;
49 	sal_uInt8				nBlockBufSize;
50 	sal_uInt8				nBlockBufPos;
51 
52 	void				AddToTable(sal_uInt16 nPrevCode, sal_uInt16 nCodeFirstData);
53 	sal_Bool				ProcessOneCode();
54 
55 
56 public:
57 
58 						GIFLZWDecompressor( sal_uInt8 cDataSize );
59 						~GIFLZWDecompressor();
60 
61 	HPBYTE				DecompressBlock( HPBYTE pSrc, sal_uInt8 cBufSize, sal_uLong& rCount, sal_Bool& rEOI );
62 };
63 
64 #endif
65