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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#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
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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