1// Copyright 2014 PDFium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7class CPDF_DecryptFilter : public CFX_DataFilter 8{ 9public: 10 CPDF_DecryptFilter(CPDF_CryptoHandler* pCryptoHandler, FX_DWORD objnum, FX_DWORD gennum); 11 virtual ~CPDF_DecryptFilter(); 12 virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf); 13 virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf); 14 CPDF_CryptoHandler* m_pCryptoHandler; 15 FX_LPVOID m_pContext; 16 FX_DWORD m_ObjNum, m_GenNum; 17}; 18class CPDF_FlateFilter : public CFX_DataFilter 19{ 20public: 21 CPDF_FlateFilter(); 22 virtual ~CPDF_FlateFilter(); 23 virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf); 24 virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf) {} 25 void* m_pContext; 26 FX_BYTE m_DestBuffer[FPDF_FILTER_BUFFER_SIZE]; 27}; 28class CPDF_LzwFilter : public CFX_DataFilter 29{ 30public: 31 CPDF_LzwFilter(FX_BOOL bEarlyChange); 32 virtual ~CPDF_LzwFilter() {} 33 virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf); 34 virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf) {} 35 FX_BOOL m_bEarlyChange; 36 FX_DWORD m_CodeArray[5021]; 37 FX_DWORD m_nCodes; 38 FX_DWORD m_CodeLen; 39 FX_DWORD m_OldCode; 40 FX_BYTE m_LastChar; 41 FX_DWORD m_nLeftBits, m_LeftBits; 42 FX_BYTE m_DecodeStack[4000]; 43 FX_DWORD m_StackLen; 44 void AddCode(FX_DWORD prefix_code, FX_BYTE append_char); 45 void DecodeString(FX_DWORD code); 46}; 47class CPDF_PredictorFilter : public CFX_DataFilter 48{ 49public: 50 CPDF_PredictorFilter(int predictor, int colors, int bpc, int cols); 51 virtual ~CPDF_PredictorFilter(); 52 virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf); 53 virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf) {} 54 FX_BOOL m_bTiff; 55 FX_DWORD m_Pitch, m_Bpp; 56 FX_LPBYTE m_pRefLine, m_pCurLine; 57 FX_DWORD m_iLine, m_LineInSize; 58}; 59class CPDF_AsciiHexFilter : public CFX_DataFilter 60{ 61public: 62 CPDF_AsciiHexFilter(); 63 virtual ~CPDF_AsciiHexFilter() {} 64 virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf); 65 virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf) {} 66 int m_State; 67 int m_FirstDigit; 68}; 69class CPDF_Ascii85Filter : public CFX_DataFilter 70{ 71public: 72 CPDF_Ascii85Filter(); 73 virtual ~CPDF_Ascii85Filter() {} 74 virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf); 75 virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf) {} 76 int m_State; 77 int m_CharCount; 78 FX_DWORD m_CurDWord; 79}; 80class CPDF_RunLenFilter : public CFX_DataFilter 81{ 82public: 83 CPDF_RunLenFilter(); 84 virtual ~CPDF_RunLenFilter() {} 85 virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf); 86 virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf) {} 87 int m_State; 88 FX_DWORD m_Count; 89}; 90class CPDF_JpegFilter : public CFX_DataFilter 91{ 92public: 93 CPDF_JpegFilter(); 94 virtual ~CPDF_JpegFilter(); 95 virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf); 96 virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf) {} 97 void* m_pContext; 98 CFX_BinaryBuf m_InputBuf; 99 FX_LPBYTE m_pScanline; 100 int m_Pitch, m_Height, m_Width, m_nComps, m_iLine; 101 FX_BOOL m_bGotHeader; 102}; 103class CPDF_FaxFilter : public CFX_DataFilter 104{ 105public: 106 CPDF_FaxFilter(); 107 virtual ~CPDF_FaxFilter(); 108 FX_BOOL Initialize(int Encoding, int bEndOfLine, int bByteAlign, int bBlack, int nRows, int nColumns); 109 virtual void v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf); 110 virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf); 111 int m_Encoding, m_bEndOfLine, m_bByteAlign, m_bBlack; 112 int m_nRows, m_nColumns, m_Pitch, m_iRow; 113 FX_LPBYTE m_pScanlineBuf, m_pRefBuf; 114 CFX_BinaryBuf m_InputBuf; 115 int m_InputBitPos; 116 void ProcessData(FX_LPCBYTE src_buf, FX_DWORD src_size, int& bitpos, FX_BOOL bFinish, 117 CFX_BinaryBuf& dest_buf); 118 FX_BOOL ReadLine(FX_LPCBYTE src_buf, int bitsize, int& bitpos); 119}; 120