From 5110c4743751145c4ae1934cd1d83bc6c55bb43f Mon Sep 17 00:00:00 2001
From: John Abd-El-Malek <jabdelmalek@google.com>
Date: Sat, 17 May 2014 22:33:34 -0700
Subject: Initial commit.

---
 core/src/fpdfapi/fpdf_parser/filters_int.h | 119 +++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 core/src/fpdfapi/fpdf_parser/filters_int.h

(limited to 'core/src/fpdfapi/fpdf_parser/filters_int.h')

diff --git a/core/src/fpdfapi/fpdf_parser/filters_int.h b/core/src/fpdfapi/fpdf_parser/filters_int.h
new file mode 100644
index 0000000000..fa7d7db76e
--- /dev/null
+++ b/core/src/fpdfapi/fpdf_parser/filters_int.h
@@ -0,0 +1,119 @@
+// 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
+
+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;
+    FX_BYTE			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;
+    FX_BYTE			m_LastChar;
+    FX_DWORD		m_nLeftBits, m_LeftBits;
+    FX_BYTE			m_DecodeStack[4000];
+    FX_DWORD		m_StackLen;
+    void			AddCode(FX_DWORD prefix_code, FX_BYTE 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);
+};
-- 
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