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// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#ifndef CORE_SRC_FPDFAPI_FPDF_PARSER_FILTERS_INT_H_
#define CORE_SRC_FPDFAPI_FPDF_PARSER_FILTERS_INT_H_
class CPDF_DecryptFilter : public CFX_DataFilter
{
public:
CPDF_DecryptFilter(CPDF_CryptoHandler* pCryptoHandler, FX_DWORD objnum, FX_DWORD gennum);
virtual ~CPDF_DecryptFilter();
virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf);
virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf);
CPDF_CryptoHandler* m_pCryptoHandler;
FX_LPVOID m_pContext;
FX_DWORD m_ObjNum, m_GenNum;
};
class CPDF_FlateFilter : public CFX_DataFilter
{
public:
CPDF_FlateFilter();
virtual ~CPDF_FlateFilter();
virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf);
virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf) {}
void* m_pContext;
uint8_t m_DestBuffer[FPDF_FILTER_BUFFER_SIZE];
};
class CPDF_LzwFilter : public CFX_DataFilter
{
public:
CPDF_LzwFilter(FX_BOOL bEarlyChange);
virtual ~CPDF_LzwFilter() {}
virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf);
virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf) {}
FX_BOOL m_bEarlyChange;
FX_DWORD m_CodeArray[5021];
FX_DWORD m_nCodes;
FX_DWORD m_CodeLen;
FX_DWORD m_OldCode;
uint8_t m_LastChar;
FX_DWORD m_nLeftBits, m_LeftBits;
uint8_t m_DecodeStack[4000];
FX_DWORD m_StackLen;
void AddCode(FX_DWORD prefix_code, uint8_t append_char);
void DecodeString(FX_DWORD code);
};
class CPDF_PredictorFilter : public CFX_DataFilter
{
public:
CPDF_PredictorFilter(int predictor, int colors, int bpc, int cols);
virtual ~CPDF_PredictorFilter();
virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf);
virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf) {}
FX_BOOL m_bTiff;
FX_DWORD m_Pitch, m_Bpp;
FX_LPBYTE m_pRefLine, m_pCurLine;
FX_DWORD m_iLine, m_LineInSize;
};
class CPDF_AsciiHexFilter : public CFX_DataFilter
{
public:
CPDF_AsciiHexFilter();
virtual ~CPDF_AsciiHexFilter() {}
virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf);
virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf) {}
int m_State;
int m_FirstDigit;
};
class CPDF_Ascii85Filter : public CFX_DataFilter
{
public:
CPDF_Ascii85Filter();
virtual ~CPDF_Ascii85Filter() {}
virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf);
virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf) {}
int m_State;
int m_CharCount;
FX_DWORD m_CurDWord;
};
class CPDF_RunLenFilter : public CFX_DataFilter
{
public:
CPDF_RunLenFilter();
virtual ~CPDF_RunLenFilter() {}
virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf);
virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf) {}
int m_State;
FX_DWORD m_Count;
};
class CPDF_JpegFilter : public CFX_DataFilter
{
public:
CPDF_JpegFilter();
virtual ~CPDF_JpegFilter();
virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf);
virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf) {}
void* m_pContext;
CFX_BinaryBuf m_InputBuf;
FX_LPBYTE m_pScanline;
int m_Pitch, m_Height, m_Width, m_nComps, m_iLine;
FX_BOOL m_bGotHeader;
};
class CPDF_FaxFilter : public CFX_DataFilter
{
public:
CPDF_FaxFilter();
virtual ~CPDF_FaxFilter();
FX_BOOL Initialize(int Encoding, int bEndOfLine, int bByteAlign, int bBlack, int nRows, int nColumns);
virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf);
virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf);
int m_Encoding, m_bEndOfLine, m_bByteAlign, m_bBlack;
int m_nRows, m_nColumns, m_Pitch, m_iRow;
FX_LPBYTE m_pScanlineBuf, m_pRefBuf;
CFX_BinaryBuf m_InputBuf;
int m_InputBitPos;
void ProcessData(FX_LPCBYTE src_buf, FX_DWORD src_size, int& bitpos, FX_BOOL bFinish,
CFX_BinaryBuf& dest_buf);
FX_BOOL ReadLine(FX_LPCBYTE src_buf, int bitsize, int& bitpos);
};
#endif // CORE_SRC_FPDFAPI_FPDF_PARSER_FILTERS_INT_H_
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