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-rw-r--r--core/src/fpdfapi/fpdf_page/pageint.h1
-rw-r--r--core/src/fpdfapi/fpdf_parser/filters_int.h145
-rw-r--r--core/src/fpdfapi/fpdf_parser/fpdf_parser_filters.cpp929
-rw-r--r--core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp34
4 files changed, 2 insertions, 1107 deletions
diff --git a/core/src/fpdfapi/fpdf_page/pageint.h b/core/src/fpdfapi/fpdf_page/pageint.h
index c931af7eb2..bc03c3b5e6 100644
--- a/core/src/fpdfapi/fpdf_page/pageint.h
+++ b/core/src/fpdfapi/fpdf_page/pageint.h
@@ -366,7 +366,6 @@ class CPDF_ContentParser {
FX_DWORD m_Size;
class CPDF_StreamContentParser* m_pParser;
FX_DWORD m_CurrentOffset;
- CPDF_StreamFilter* m_pStreamFilter;
};
class CPDF_AllStates : public CPDF_GraphicStates {
public:
diff --git a/core/src/fpdfapi/fpdf_parser/filters_int.h b/core/src/fpdfapi/fpdf_parser/filters_int.h
deleted file mode 100644
index 571801481d..0000000000
--- a/core/src/fpdfapi/fpdf_parser/filters_int.h
+++ /dev/null
@@ -1,145 +0,0 @@
-// 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(const uint8_t* src_buf,
- FX_DWORD src_size,
- CFX_BinaryBuf& dest_buf);
- virtual void v_FilterFinish(CFX_BinaryBuf& dest_buf);
- CPDF_CryptoHandler* m_pCryptoHandler;
- void* m_pContext;
- FX_DWORD m_ObjNum, m_GenNum;
-};
-class CPDF_FlateFilter : public CFX_DataFilter {
- public:
- CPDF_FlateFilter();
- virtual ~CPDF_FlateFilter();
- virtual void v_FilterIn(const uint8_t* 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(const uint8_t* 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(const uint8_t* 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;
- uint8_t* m_pRefLine;
- uint8_t* m_pCurLine;
- FX_DWORD m_iLine, m_LineInSize;
-};
-class CPDF_AsciiHexFilter : public CFX_DataFilter {
- public:
- CPDF_AsciiHexFilter();
- virtual ~CPDF_AsciiHexFilter() {}
- virtual void v_FilterIn(const uint8_t* 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(const uint8_t* 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(const uint8_t* 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(const uint8_t* 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;
- uint8_t* 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(const uint8_t* 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;
- uint8_t* m_pScanlineBuf;
- uint8_t* m_pRefBuf;
- CFX_BinaryBuf m_InputBuf;
- int m_InputBitPos;
- void ProcessData(const uint8_t* src_buf,
- FX_DWORD src_size,
- int& bitpos,
- FX_BOOL bFinish,
- CFX_BinaryBuf& dest_buf);
- FX_BOOL ReadLine(const uint8_t* src_buf, int bitsize, int& bitpos);
-};
-
-#endif // CORE_SRC_FPDFAPI_FPDF_PARSER_FILTERS_INT_H_
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_filters.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_filters.cpp
deleted file mode 100644
index 8cb432029c..0000000000
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_filters.cpp
+++ /dev/null
@@ -1,929 +0,0 @@
-// 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
-
-#include "../../../include/fpdfapi/fpdf_parser.h"
-#include "../../../include/fxcodec/fx_codec.h"
-#include "../../../include/fxcodec/fx_codec_flate.h"
-#include "../../../include/fpdfapi/fpdf_module.h"
-#include "filters_int.h"
-
-extern "C" {
-
-static void* my_alloc_func(void* opaque,
- unsigned int items,
- unsigned int size) {
- return FX_Alloc2D(uint8_t, items, size);
-}
-static void my_free_func(void* opaque, void* address) {
- FX_Free(address);
-}
-
-} // extern "C"
-
-CFX_DataFilter::CFX_DataFilter() {
- m_bEOF = FALSE;
- m_pDestFilter = NULL;
- m_SrcPos = 0;
-}
-CFX_DataFilter::~CFX_DataFilter() {
- delete m_pDestFilter;
-}
-void CFX_DataFilter::SetDestFilter(CFX_DataFilter* pFilter) {
- if (m_pDestFilter) {
- m_pDestFilter->SetDestFilter(pFilter);
- } else {
- m_pDestFilter = pFilter;
- }
-}
-void CFX_DataFilter::FilterIn(const uint8_t* src_buf,
- FX_DWORD src_size,
- CFX_BinaryBuf& dest_buf) {
- if (m_bEOF) {
- return;
- }
- m_SrcPos += src_size;
- if (m_pDestFilter) {
- CFX_BinaryBuf temp_buf;
- temp_buf.EstimateSize(FPDF_FILTER_BUFFER_SIZE, FPDF_FILTER_BUFFER_SIZE);
- v_FilterIn(src_buf, src_size, temp_buf);
- m_pDestFilter->FilterIn(temp_buf.GetBuffer(), temp_buf.GetSize(), dest_buf);
- } else {
- v_FilterIn(src_buf, src_size, dest_buf);
- }
-}
-void CFX_DataFilter::FilterFinish(CFX_BinaryBuf& dest_buf) {
- if (m_pDestFilter) {
- CFX_BinaryBuf temp_buf;
- v_FilterFinish(temp_buf);
- if (temp_buf.GetSize()) {
- m_pDestFilter->FilterIn(temp_buf.GetBuffer(), temp_buf.GetSize(),
- dest_buf);
- }
- m_pDestFilter->FilterFinish(dest_buf);
- } else {
- v_FilterFinish(dest_buf);
- }
- m_bEOF = TRUE;
-}
-void CFX_DataFilter::ReportEOF(FX_DWORD left_input) {
- if (m_bEOF) {
- return;
- }
- m_bEOF = TRUE;
- m_SrcPos -= left_input;
-}
-CFX_DataFilter* FPDF_CreateFilter(const CFX_ByteStringC& name,
- const CPDF_Dictionary* pParam,
- int width,
- int height) {
- FX_DWORD id = name.GetID();
- switch (id) {
- case FXBSTR_ID('F', 'l', 'a', 't'):
- case FXBSTR_ID('F', 'l', 0, 0):
- case FXBSTR_ID('L', 'Z', 'W', 'D'):
- case FXBSTR_ID('L', 'Z', 'W', 0): {
- CFX_DataFilter* pFilter;
- if (id == FXBSTR_ID('L', 'Z', 'W', 'D') ||
- id == FXBSTR_ID('L', 'Z', 'W', 0)) {
- pFilter = new CPDF_LzwFilter(
- pParam ? pParam->GetInteger("EarlyChange", 1) : 1);
- } else {
- pFilter = new CPDF_FlateFilter;
- }
- if ((pParam ? pParam->GetInteger("Predictor", 1) : 1) > 1) {
- CFX_DataFilter* pPredictor = new CPDF_PredictorFilter(
- pParam->GetInteger(FX_BSTRC("Predictor"), 1),
- pParam->GetInteger(FX_BSTRC("Colors"), 1),
- pParam->GetInteger(FX_BSTRC("BitsPerComponent"), 8),
- pParam->GetInteger(FX_BSTRC("Columns"), 1));
- pFilter->SetDestFilter(pPredictor);
- }
- return pFilter;
- }
- case FXBSTR_ID('A', 'S', 'C', 'I'):
- if (name == "ASCIIHexDecode") {
- return new CPDF_AsciiHexFilter;
- }
- return new CPDF_Ascii85Filter;
- case FXBSTR_ID('A', 'H', 'x', 0):
- return new CPDF_AsciiHexFilter;
- case FXBSTR_ID('A', '8', '5', 0):
- return new CPDF_Ascii85Filter;
- case FXBSTR_ID('R', 'u', 'n', 'L'):
- return new CPDF_RunLenFilter;
- case FXBSTR_ID('C', 'C', 'I', 'T'): {
- int Encoding = 0;
- int bEndOfLine = FALSE;
- int bByteAlign = FALSE;
- int bBlack = FALSE;
- int nRows = 0;
- int nColumns = 1728;
- if (pParam) {
- Encoding = pParam->GetInteger(FX_BSTRC("K"));
- bEndOfLine = pParam->GetInteger(FX_BSTRC("EndOfLine"));
- bByteAlign = pParam->GetInteger(FX_BSTRC("EncodedByteAlign"));
- bBlack = pParam->GetInteger(FX_BSTRC("BlackIs1"));
- nColumns = pParam->GetInteger(FX_BSTRC("Columns"), 1728);
- nRows = pParam->GetInteger(FX_BSTRC("Rows"));
- }
- if (nColumns == 0) {
- nColumns = width;
- }
- if (nRows == 0) {
- nRows = height;
- }
- CPDF_FaxFilter* pFilter = new CPDF_FaxFilter();
- pFilter->Initialize(Encoding, bEndOfLine, bByteAlign, bBlack, nRows,
- nColumns);
- return pFilter;
- }
- case FXBSTR_ID('D', 'C', 'T', 'D'):
- return new CPDF_JpegFilter;
- default:
- return NULL;
- }
-}
-CFX_DataFilter* _FPDF_CreateFilterFromDict(CPDF_Dictionary* pDict) {
- CPDF_Object* pDecoder = pDict->GetElementValue("Filter");
- if (pDecoder == NULL) {
- return NULL;
- }
- CFX_DataFilter* pFirstFilter = NULL;
- int width = pDict->GetInteger(FX_BSTRC("Width")),
- height = pDict->GetInteger(FX_BSTRC("Height"));
- CPDF_Object* pParams = pDict->GetElementValue("DecodeParms");
- if (pDecoder->GetType() == PDFOBJ_ARRAY) {
- if (pParams && pParams->GetType() != PDFOBJ_ARRAY) {
- pParams = NULL;
- }
- for (FX_DWORD i = 0; i < ((CPDF_Array*)pDecoder)->GetCount(); i++) {
- CFX_ByteString name = ((CPDF_Array*)pDecoder)->GetString(i);
- CPDF_Dictionary* pParam = NULL;
- if (pParams) {
- pParam = ((CPDF_Array*)pParams)->GetDict(i);
- }
- CFX_DataFilter* pDestFilter =
- FPDF_CreateFilter(name, pParam, width, height);
- if (pDestFilter) {
- if (pFirstFilter == NULL) {
- pFirstFilter = pDestFilter;
- } else {
- pFirstFilter->SetDestFilter(pDestFilter);
- }
- }
- }
- } else {
- if (pParams && pParams->GetType() != PDFOBJ_DICTIONARY) {
- pParams = NULL;
- }
- pFirstFilter = FPDF_CreateFilter(pDecoder->GetString(),
- (CPDF_Dictionary*)pParams, width, height);
- }
- return pFirstFilter;
-}
-CPDF_StreamFilter* CPDF_Stream::GetStreamFilter(FX_BOOL bRaw) const {
- CFX_DataFilter* pFirstFilter = NULL;
- if (m_pCryptoHandler) {
- pFirstFilter = new CPDF_DecryptFilter(m_pCryptoHandler, m_ObjNum, m_GenNum);
- }
- if (!bRaw) {
- CFX_DataFilter* pFilter = _FPDF_CreateFilterFromDict(m_pDict);
- if (pFilter) {
- if (pFirstFilter == NULL) {
- pFirstFilter = pFilter;
- } else {
- pFirstFilter->SetDestFilter(pFilter);
- }
- }
- }
- CPDF_StreamFilter* pStreamFilter = new CPDF_StreamFilter;
- pStreamFilter->m_pStream = this;
- pStreamFilter->m_pFilter = pFirstFilter;
- pStreamFilter->m_pBuffer = NULL;
- pStreamFilter->m_SrcOffset = 0;
- return pStreamFilter;
-}
-CPDF_StreamFilter::~CPDF_StreamFilter() {
- delete m_pFilter;
- delete m_pBuffer;
-}
-#define FPDF_FILTER_BUFFER_IN_SIZE FPDF_FILTER_BUFFER_SIZE
-FX_DWORD CPDF_StreamFilter::ReadBlock(uint8_t* buffer, FX_DWORD buf_size) {
- if (m_pFilter == NULL) {
- FX_DWORD read_size = m_pStream->GetRawSize() - m_SrcOffset;
- if (read_size == 0) {
- return 0;
- }
- if (read_size > buf_size) {
- read_size = buf_size;
- }
- m_pStream->ReadRawData(m_SrcOffset, buffer, read_size);
- m_SrcOffset += read_size;
- return read_size;
- }
- FX_DWORD read_size = 0;
- if (m_pBuffer) {
- read_size = ReadLeftOver(buffer, buf_size);
- if (read_size == buf_size) {
- return read_size;
- }
- buffer += read_size;
- buf_size -= read_size;
- }
- ASSERT(m_pBuffer == NULL);
- if (m_pFilter->IsEOF()) {
- return read_size;
- }
- m_pBuffer = new CFX_BinaryBuf;
- m_pBuffer->EstimateSize(FPDF_FILTER_BUFFER_SIZE, FPDF_FILTER_BUFFER_SIZE);
- m_BufOffset = 0;
- while (1) {
- int src_size = m_pStream->GetRawSize() - m_SrcOffset;
- if (src_size == 0) {
- m_pFilter->FilterFinish(*m_pBuffer);
- break;
- }
- if (src_size > FPDF_FILTER_BUFFER_IN_SIZE) {
- src_size = FPDF_FILTER_BUFFER_IN_SIZE;
- }
- if (!m_pStream->ReadRawData(m_SrcOffset, m_SrcBuffer, src_size)) {
- return 0;
- }
- m_SrcOffset += src_size;
- m_pFilter->FilterIn(m_SrcBuffer, src_size, *m_pBuffer);
- if (m_pBuffer->GetSize() >= (int)buf_size) {
- break;
- }
- }
- return read_size + ReadLeftOver(buffer, buf_size);
-}
-FX_DWORD CPDF_StreamFilter::ReadLeftOver(uint8_t* buffer, FX_DWORD buf_size) {
- FX_DWORD read_size = m_pBuffer->GetSize() - m_BufOffset;
- if (read_size > buf_size) {
- read_size = buf_size;
- }
- FXSYS_memcpy(buffer, m_pBuffer->GetBuffer() + m_BufOffset, read_size);
- m_BufOffset += read_size;
- if (m_BufOffset == (FX_DWORD)m_pBuffer->GetSize()) {
- delete m_pBuffer;
- m_pBuffer = NULL;
- }
- return read_size;
-}
-CPDF_DecryptFilter::CPDF_DecryptFilter(CPDF_CryptoHandler* pCryptoHandler,
- FX_DWORD objnum,
- FX_DWORD gennum) {
- m_pCryptoHandler = pCryptoHandler;
- m_pContext = NULL;
- m_ObjNum = objnum;
- m_GenNum = gennum;
-}
-CPDF_DecryptFilter::~CPDF_DecryptFilter() {
- CFX_BinaryBuf buf;
- if (m_pContext) {
- m_pCryptoHandler->DecryptFinish(m_pContext, buf);
- }
-}
-void CPDF_DecryptFilter::v_FilterIn(const uint8_t* src_buf,
- FX_DWORD src_size,
- CFX_BinaryBuf& dest_buf) {
- if (m_pContext == NULL) {
- m_pContext = m_pCryptoHandler->DecryptStart(m_ObjNum, m_GenNum);
- }
- m_pCryptoHandler->DecryptStream(m_pContext, src_buf, src_size, dest_buf);
-}
-void CPDF_DecryptFilter::v_FilterFinish(CFX_BinaryBuf& dest_buf) {
- m_bEOF = TRUE;
- if (m_pContext == NULL) {
- return;
- }
- m_pCryptoHandler->DecryptFinish(m_pContext, dest_buf);
- m_pContext = NULL;
-}
-CPDF_FlateFilter::CPDF_FlateFilter() {
- m_pContext = NULL;
-}
-CPDF_FlateFilter::~CPDF_FlateFilter() {
- if (m_pContext) {
- FPDFAPI_FlateEnd(m_pContext);
- }
-}
-void CPDF_FlateFilter::v_FilterIn(const uint8_t* src_buf,
- FX_DWORD src_size,
- CFX_BinaryBuf& dest_buf) {
- if (m_pContext == NULL) {
- m_pContext = FPDFAPI_FlateInit(my_alloc_func, my_free_func);
- }
- FPDFAPI_FlateInput(m_pContext, src_buf, src_size);
- while (1) {
- int ret =
- FPDFAPI_FlateOutput(m_pContext, m_DestBuffer, FPDF_FILTER_BUFFER_SIZE);
- int out_size =
- FPDF_FILTER_BUFFER_SIZE - FPDFAPI_FlateGetAvailOut(m_pContext);
- dest_buf.AppendBlock(m_DestBuffer, out_size);
- if (ret == Z_BUF_ERROR) {
- break;
- }
- if (ret != Z_OK) {
- ReportEOF(FPDFAPI_FlateGetAvailIn(m_pContext));
- break;
- }
- }
-}
-CPDF_LzwFilter::CPDF_LzwFilter(FX_BOOL bEarlyChange) {
- m_bEarlyChange = bEarlyChange ? 1 : 0;
- m_CodeLen = 9;
- m_nCodes = 0;
- m_nLeftBits = 0;
- m_LeftBits = 0;
- m_OldCode = (FX_DWORD)-1;
-}
-void CPDF_LzwFilter::v_FilterIn(const uint8_t* src_buf,
- FX_DWORD src_size,
- CFX_BinaryBuf& dest_buf) {
- for (FX_DWORD i = 0; i < src_size; i++) {
- if (m_nLeftBits + 8 < m_CodeLen) {
- m_nLeftBits += 8;
- m_LeftBits = (m_LeftBits << 8) | src_buf[i];
- continue;
- }
- FX_DWORD new_bits = m_CodeLen - m_nLeftBits;
- FX_DWORD code = (m_LeftBits << new_bits) | (src_buf[i] >> (8 - new_bits));
- m_nLeftBits = 8 - new_bits;
- m_LeftBits = src_buf[i] % (1 << m_nLeftBits);
- if (code < 256) {
- dest_buf.AppendByte((uint8_t)code);
- m_LastChar = (uint8_t)code;
- if (m_OldCode != -1) {
- AddCode(m_OldCode, m_LastChar);
- }
- m_OldCode = code;
- } else if (code == 256) {
- m_CodeLen = 9;
- m_nCodes = 0;
- m_OldCode = (FX_DWORD)-1;
- } else if (code == 257) {
- ReportEOF(src_size - i - 1);
- return;
- } else {
- if (m_OldCode == -1) {
- ReportEOF(src_size - i - 1);
- return;
- }
- m_StackLen = 0;
- if (code >= m_nCodes + 258) {
- if (m_StackLen < sizeof(m_DecodeStack)) {
- m_DecodeStack[m_StackLen++] = m_LastChar;
- }
- DecodeString(m_OldCode);
- } else {
- DecodeString(code);
- }
- dest_buf.AppendBlock(NULL, m_StackLen);
- uint8_t* pOutput = dest_buf.GetBuffer() + dest_buf.GetSize() - m_StackLen;
- for (FX_DWORD cc = 0; cc < m_StackLen; cc++) {
- pOutput[cc] = m_DecodeStack[m_StackLen - cc - 1];
- }
- m_LastChar = m_DecodeStack[m_StackLen - 1];
- if (m_OldCode < 256) {
- AddCode(m_OldCode, m_LastChar);
- } else if (m_OldCode - 258 >= m_nCodes) {
- ReportEOF(src_size - i - 1);
- return;
- } else {
- AddCode(m_OldCode, m_LastChar);
- }
- m_OldCode = code;
- }
- }
-}
-void CPDF_LzwFilter::AddCode(FX_DWORD prefix_code, uint8_t append_char) {
- if (m_nCodes + m_bEarlyChange == 4094) {
- return;
- }
- m_CodeArray[m_nCodes++] = (prefix_code << 16) | append_char;
- if (m_nCodes + m_bEarlyChange == 512 - 258) {
- m_CodeLen = 10;
- } else if (m_nCodes + m_bEarlyChange == 1024 - 258) {
- m_CodeLen = 11;
- } else if (m_nCodes + m_bEarlyChange == 2048 - 258) {
- m_CodeLen = 12;
- }
-}
-void CPDF_LzwFilter::DecodeString(FX_DWORD code) {
- while (1) {
- int index = code - 258;
- if (index < 0 || index >= (int)m_nCodes) {
- break;
- }
- FX_DWORD data = m_CodeArray[index];
- if (m_StackLen >= sizeof(m_DecodeStack)) {
- return;
- }
- m_DecodeStack[m_StackLen++] = (uint8_t)data;
- code = data >> 16;
- }
- if (m_StackLen >= sizeof(m_DecodeStack)) {
- return;
- }
- m_DecodeStack[m_StackLen++] = (uint8_t)code;
-}
-CPDF_PredictorFilter::CPDF_PredictorFilter(int predictor,
- int colors,
- int bpc,
- int cols) {
- m_bTiff = predictor < 10;
- m_pRefLine = NULL;
- m_pCurLine = NULL;
- m_iLine = 0;
- m_LineInSize = 0;
- m_Bpp = (colors * bpc + 7) / 8;
- m_Pitch = (colors * bpc * cols + 7) / 8;
- if (!m_bTiff) {
- m_Pitch++;
- }
-}
-CPDF_PredictorFilter::~CPDF_PredictorFilter() {
- if (m_pCurLine) {
- FX_Free(m_pCurLine);
- }
- if (m_pRefLine) {
- FX_Free(m_pRefLine);
- }
-}
-static uint8_t PaethPredictor(int a, int b, int c) {
- int p = a + b - c;
- int pa = FXSYS_abs(p - a);
- int pb = FXSYS_abs(p - b);
- int pc = FXSYS_abs(p - c);
- if (pa <= pb && pa <= pc) {
- return (uint8_t)a;
- }
- if (pb <= pc) {
- return (uint8_t)b;
- }
- return (uint8_t)c;
-}
-static void PNG_PredictorLine(uint8_t* cur_buf,
- uint8_t* ref_buf,
- int pitch,
- int Bpp) {
- uint8_t tag = cur_buf[0];
- if (tag == 0) {
- return;
- }
- cur_buf++;
- if (ref_buf) {
- ref_buf++;
- }
- for (int byte = 0; byte < pitch; byte++) {
- uint8_t raw_byte = cur_buf[byte];
- switch (tag) {
- case 1: {
- uint8_t left = 0;
- if (byte >= Bpp) {
- left = cur_buf[byte - Bpp];
- }
- cur_buf[byte] = raw_byte + left;
- break;
- }
- case 2: {
- uint8_t up = 0;
- if (ref_buf) {
- up = ref_buf[byte];
- }
- cur_buf[byte] = raw_byte + up;
- break;
- }
- case 3: {
- uint8_t left = 0;
- if (byte >= Bpp) {
- left = cur_buf[byte - Bpp];
- }
- uint8_t up = 0;
- if (ref_buf) {
- up = ref_buf[byte];
- }
- cur_buf[byte] = raw_byte + (up + left) / 2;
- break;
- }
- case 4: {
- uint8_t left = 0;
- if (byte >= Bpp) {
- left = cur_buf[byte - Bpp];
- }
- uint8_t up = 0;
- if (ref_buf) {
- up = ref_buf[byte];
- }
- uint8_t upper_left = 0;
- if (byte >= Bpp && ref_buf) {
- upper_left = ref_buf[byte - Bpp];
- }
- cur_buf[byte] = raw_byte + PaethPredictor(left, up, upper_left);
- break;
- }
- }
- }
-}
-void CPDF_PredictorFilter::v_FilterIn(const uint8_t* src_buf,
- FX_DWORD src_size,
- CFX_BinaryBuf& dest_buf) {
- if (m_pCurLine == NULL) {
- m_pCurLine = FX_Alloc(uint8_t, m_Pitch);
- if (!m_bTiff) {
- m_pRefLine = FX_Alloc(uint8_t, m_Pitch);
- }
- }
- while (1) {
- FX_DWORD read_size = m_Pitch - m_LineInSize;
- if (read_size > src_size) {
- read_size = src_size;
- }
- FXSYS_memcpy(m_pCurLine + m_LineInSize, src_buf, read_size);
- m_LineInSize += read_size;
- if (m_LineInSize < m_Pitch) {
- break;
- }
- src_buf += read_size;
- src_size -= read_size;
- if (m_bTiff) {
- for (FX_DWORD byte = m_Bpp; byte < m_Pitch; byte++) {
- m_pCurLine[byte] += m_pCurLine[byte - m_Bpp];
- }
- dest_buf.AppendBlock(m_pCurLine, m_Pitch);
- } else {
- PNG_PredictorLine(m_pCurLine, m_iLine ? m_pRefLine : NULL, m_Pitch - 1,
- m_Bpp);
- dest_buf.AppendBlock(m_pCurLine + 1, m_Pitch - 1);
- m_iLine++;
- uint8_t* temp = m_pCurLine;
- m_pCurLine = m_pRefLine;
- m_pRefLine = temp;
- }
- m_LineInSize = 0;
- }
-}
-CPDF_Ascii85Filter::CPDF_Ascii85Filter() {
- m_State = 0;
- m_CharCount = 0;
-}
-void CPDF_Ascii85Filter::v_FilterIn(const uint8_t* src_buf,
- FX_DWORD src_size,
- CFX_BinaryBuf& dest_buf) {
- for (FX_DWORD i = 0; i < src_size; i++) {
- uint8_t byte = src_buf[i];
- if (PDF_CharType[byte] == 'W') {
- continue;
- }
- switch (m_State) {
- case 0:
- if (byte >= '!' && byte <= 'u') {
- int digit = byte - '!';
- m_CurDWord = digit;
- m_CharCount = 1;
- m_State = 1;
- } else if (byte == 'z') {
- int zero = 0;
- dest_buf.AppendBlock(&zero, 4);
- } else if (byte == '~') {
- m_State = 2;
- }
- break;
- case 1: {
- if (byte >= '!' && byte <= 'u') {
- int digit = byte - '!';
- m_CurDWord = m_CurDWord * 85 + digit;
- m_CharCount++;
- if (m_CharCount == 5) {
- for (int i = 0; i < 4; i++) {
- dest_buf.AppendByte((uint8_t)(m_CurDWord >> (3 - i) * 8));
- }
- m_State = 0;
- }
- } else if (byte == '~') {
- if (m_CharCount > 1) {
- int i;
- for (i = m_CharCount; i < 5; i++) {
- m_CurDWord = m_CurDWord * 85 + 84;
- }
- for (i = 0; i < m_CharCount - 1; i++) {
- dest_buf.AppendByte((uint8_t)(m_CurDWord >> (3 - i) * 8));
- }
- }
- m_State = 2;
- }
- break;
- }
- case 2:
- if (byte == '>') {
- ReportEOF(src_size - i - 1);
- return;
- }
- break;
- }
- }
-}
-CPDF_AsciiHexFilter::CPDF_AsciiHexFilter() {
- m_State = 0;
-}
-void CPDF_AsciiHexFilter::v_FilterIn(const uint8_t* src_buf,
- FX_DWORD src_size,
- CFX_BinaryBuf& dest_buf) {
- for (FX_DWORD i = 0; i < src_size; i++) {
- uint8_t byte = src_buf[i];
- if (PDF_CharType[byte] == 'W') {
- continue;
- }
- int digit;
- if (byte >= '0' && byte <= '9') {
- digit = byte - '0';
- } else if (byte >= 'a' && byte <= 'f') {
- digit = byte - 'a' + 10;
- } else if (byte >= 'A' && byte <= 'F') {
- digit = byte - 'A' + 10;
- } else {
- if (m_State) {
- dest_buf.AppendByte(m_FirstDigit * 16);
- }
- ReportEOF(src_size - i - 1);
- return;
- }
- if (m_State == 0) {
- m_FirstDigit = digit;
- m_State++;
- } else {
- dest_buf.AppendByte(m_FirstDigit * 16 + digit);
- m_State--;
- }
- }
-}
-CPDF_RunLenFilter::CPDF_RunLenFilter() {
- m_State = 0;
- m_Count = 0;
-}
-void CPDF_RunLenFilter::v_FilterIn(const uint8_t* src_buf,
- FX_DWORD src_size,
- CFX_BinaryBuf& dest_buf) {
- for (FX_DWORD i = 0; i < src_size; i++) {
- uint8_t byte = src_buf[i];
- switch (m_State) {
- case 0:
- if (byte < 128) {
- m_State = 1;
- m_Count = byte + 1;
- } else if (byte == 128) {
- ReportEOF(src_size - i - 1);
- return;
- } else {
- m_State = 2;
- m_Count = 257 - byte;
- }
- break;
- case 1:
- dest_buf.AppendByte(byte);
- m_Count--;
- if (m_Count == 0) {
- m_State = 0;
- }
- break;
- case 2: {
- dest_buf.AppendBlock(NULL, m_Count);
- FXSYS_memset(dest_buf.GetBuffer() + dest_buf.GetSize() - m_Count, byte,
- m_Count);
- m_State = 0;
- break;
- }
- }
- }
-}
-CPDF_JpegFilter::CPDF_JpegFilter() {
- m_pContext = NULL;
- m_bGotHeader = FALSE;
- m_pScanline = NULL;
- m_iLine = 0;
-}
-CPDF_JpegFilter::~CPDF_JpegFilter() {
- if (m_pScanline) {
- FX_Free(m_pScanline);
- }
- if (m_pContext) {
- CPDF_ModuleMgr::Get()->GetJpegModule()->Finish(m_pContext);
- }
-}
-void CPDF_JpegFilter::v_FilterIn(const uint8_t* src_buf,
- FX_DWORD src_size,
- CFX_BinaryBuf& dest_buf) {
- if (m_pContext == NULL) {
- m_pContext = CPDF_ModuleMgr::Get()->GetJpegModule()->Start();
- }
- const uint8_t* jpeg_src_buf;
- FX_DWORD jpeg_src_size;
- CFX_BinaryBuf temp_buf;
- if (m_InputBuf.GetSize()) {
- temp_buf.EstimateSize(m_InputBuf.GetSize() + src_size);
- temp_buf.AppendBlock(m_InputBuf.GetBuffer(), m_InputBuf.GetSize());
- m_InputBuf.Clear();
- temp_buf.AppendBlock(src_buf, src_size);
- jpeg_src_buf = temp_buf.GetBuffer();
- jpeg_src_size = temp_buf.GetSize();
- } else {
- jpeg_src_buf = src_buf;
- jpeg_src_size = src_size;
- }
- CPDF_ModuleMgr::Get()->GetJpegModule()->Input(m_pContext, jpeg_src_buf,
- jpeg_src_size);
- if (!m_bGotHeader) {
- int ret = CPDF_ModuleMgr::Get()->GetJpegModule()->ReadHeader(
- m_pContext, &m_Width, &m_Height, &m_nComps);
- int left_size =
- CPDF_ModuleMgr::Get()->GetJpegModule()->GetAvailInput(m_pContext);
- if (ret == 1) {
- ReportEOF(left_size);
- return;
- }
- if (ret == 2) {
- m_InputBuf.AppendBlock(jpeg_src_buf + jpeg_src_size - left_size,
- left_size);
- return;
- }
- CPDF_ModuleMgr::Get()->GetJpegModule()->StartScanline(m_pContext, 1);
- m_bGotHeader = TRUE;
- m_Pitch = m_Width * m_nComps;
- }
- if (m_pScanline == NULL) {
- m_pScanline = FX_Alloc(uint8_t, m_Pitch + 4);
- }
- while (1) {
- if (!CPDF_ModuleMgr::Get()->GetJpegModule()->ReadScanline(m_pContext,
- m_pScanline)) {
- int left_size =
- CPDF_ModuleMgr::Get()->GetJpegModule()->GetAvailInput(m_pContext);
- m_InputBuf.AppendBlock(jpeg_src_buf + jpeg_src_size - left_size,
- left_size);
- break;
- }
- dest_buf.AppendBlock(m_pScanline, m_Pitch);
- m_iLine++;
- if (m_iLine == m_Height) {
- ReportEOF(
- CPDF_ModuleMgr::Get()->GetJpegModule()->GetAvailInput(m_pContext));
- return;
- }
- }
-}
-CPDF_FaxFilter::CPDF_FaxFilter() {
- m_Encoding = 0;
- m_bEndOfLine = FALSE;
- m_bByteAlign = FALSE;
- m_bBlack = FALSE;
- m_nRows = 0;
- m_nColumns = 0;
- m_Pitch = 0;
- m_pScanlineBuf = NULL;
- m_pRefBuf = NULL;
- m_iRow = 0;
- m_InputBitPos = 0;
-}
-CPDF_FaxFilter::~CPDF_FaxFilter() {
- if (m_pScanlineBuf) {
- FX_Free(m_pScanlineBuf);
- }
- if (m_pRefBuf) {
- FX_Free(m_pRefBuf);
- }
-}
-FX_BOOL CPDF_FaxFilter::Initialize(int Encoding,
- int bEndOfLine,
- int bByteAlign,
- int bBlack,
- int nRows,
- int nColumns) {
- m_Encoding = Encoding;
- m_bEndOfLine = bEndOfLine;
- m_bByteAlign = bByteAlign;
- m_bBlack = bBlack;
- m_nRows = nRows;
- m_nColumns = nColumns;
- m_Pitch = (m_nColumns + 7) / 8;
- m_pScanlineBuf = FX_Alloc(uint8_t, m_Pitch);
- m_pRefBuf = FX_Alloc(uint8_t, m_Pitch);
- FXSYS_memset(m_pScanlineBuf, 0xff, m_Pitch);
- FXSYS_memset(m_pRefBuf, 0xff, m_Pitch);
- m_iRow = 0;
- m_InputBitPos = 0;
- return TRUE;
-}
-void CPDF_FaxFilter::v_FilterIn(const uint8_t* src_buf,
- FX_DWORD src_size,
- CFX_BinaryBuf& dest_buf) {
- const uint8_t* fax_src_buf;
- FX_DWORD fax_src_size;
- CFX_BinaryBuf temp_buf;
- int bitpos;
- if (m_InputBuf.GetSize()) {
- temp_buf.EstimateSize(m_InputBuf.GetSize() + src_size);
- temp_buf.AppendBlock(m_InputBuf.GetBuffer(), m_InputBuf.GetSize());
- m_InputBuf.Clear();
- temp_buf.AppendBlock(src_buf, src_size);
- fax_src_buf = temp_buf.GetBuffer();
- fax_src_size = temp_buf.GetSize();
- bitpos = m_InputBitPos;
- } else {
- fax_src_buf = src_buf;
- fax_src_size = src_size;
- bitpos = 0;
- }
- ProcessData(fax_src_buf, fax_src_size, bitpos, FALSE, dest_buf);
- int left_bits = fax_src_size * 8 - bitpos;
- m_InputBuf.AppendBlock(fax_src_buf + bitpos / 8, (left_bits + 7) / 8);
- m_InputBitPos = bitpos % 8;
-}
-void CPDF_FaxFilter::v_FilterFinish(CFX_BinaryBuf& dest_buf) {
- ProcessData(m_InputBuf.GetBuffer(), m_InputBuf.GetSize(), m_InputBitPos, TRUE,
- dest_buf);
-}
-FX_BOOL _FaxSkipEOL(const uint8_t* src_buf, int bitsize, int& bitpos);
-FX_BOOL _FaxG4GetRow(const uint8_t* src_buf,
- int bitsize,
- int& bitpos,
- uint8_t* dest_buf,
- const uint8_t* ref_buf,
- int columns);
-FX_BOOL _FaxGet1DLine(const uint8_t* src_buf,
- int bitsize,
- int& bitpos,
- uint8_t* dest_buf,
- int columns);
-void CPDF_FaxFilter::ProcessData(const uint8_t* src_buf,
- FX_DWORD src_size,
- int& bitpos,
- FX_BOOL bFinish,
- CFX_BinaryBuf& dest_buf) {
- int bitsize = src_size * 8;
- while (1) {
- if ((bitsize < bitpos + 256) && !bFinish) {
- return;
- }
- int start_bitpos = bitpos;
- FXSYS_memset(m_pScanlineBuf, 0xff, m_Pitch);
- if (!ReadLine(src_buf, bitsize, bitpos)) {
- bitpos = start_bitpos;
- return;
- }
- if (m_Encoding) {
- FXSYS_memcpy(m_pRefBuf, m_pScanlineBuf, m_Pitch);
- }
- if (m_bBlack) {
- for (int i = 0; i < m_Pitch; i++) {
- m_pScanlineBuf[i] = ~m_pScanlineBuf[i];
- }
- }
- dest_buf.AppendBlock(m_pScanlineBuf, m_Pitch);
- m_iRow++;
- if (m_iRow == m_nRows) {
- ReportEOF(src_size - (bitpos + 7) / 8);
- return;
- }
- }
-}
-FX_BOOL CPDF_FaxFilter::ReadLine(const uint8_t* src_buf,
- int bitsize,
- int& bitpos) {
- if (!_FaxSkipEOL(src_buf, bitsize, bitpos)) {
- return FALSE;
- }
- FX_BOOL ret;
- if (m_Encoding < 0) {
- ret = _FaxG4GetRow(src_buf, bitsize, bitpos, m_pScanlineBuf, m_pRefBuf,
- m_nColumns);
- } else if (m_Encoding == 0) {
- ret = _FaxGet1DLine(src_buf, bitsize, bitpos, m_pScanlineBuf, m_nColumns);
- } else {
- if (bitpos == bitsize) {
- return FALSE;
- }
- FX_BOOL bNext1D = src_buf[bitpos / 8] & (1 << (7 - bitpos % 8));
- bitpos++;
- if (bNext1D) {
- ret = _FaxGet1DLine(src_buf, bitsize, bitpos, m_pScanlineBuf, m_nColumns);
- } else {
- ret = _FaxG4GetRow(src_buf, bitsize, bitpos, m_pScanlineBuf, m_pRefBuf,
- m_nColumns);
- }
- }
- if (!ret) {
- return FALSE;
- }
- if (m_bEndOfLine)
- if (!_FaxSkipEOL(src_buf, bitsize, bitpos)) {
- return FALSE;
- }
- if (m_bByteAlign) {
- bitpos = (bitpos + 7) / 8 * 8;
- }
- return TRUE;
-}
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp
index 932793218d..3830ad68a3 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp
@@ -915,6 +915,7 @@ void CPDF_Stream::InitStream(IFX_FileRead* pFile, CPDF_Dictionary* pDict) {
m_pDict->SetAtInteger(FX_BSTRC("Length"), m_dwSize);
}
}
+
FX_BOOL CPDF_Stream::Identical(CPDF_Stream* pOther) const {
if (!m_pDict)
return pOther->m_pDict ? FALSE : TRUE;
@@ -985,38 +986,7 @@ FX_BOOL CPDF_Stream::Identical(CPDF_Stream* pOther) const {
}
return FXSYS_memcmp(m_pDataBuf, pOther->m_pDataBuf, m_dwSize) == 0;
}
-CPDF_Stream* CPDF_Stream::Clone(FX_BOOL bDirect,
- FPDF_LPFCloneStreamCallback lpfCallback,
- void* pUserData) const {
- CPDF_Dictionary* pCloneDict = (CPDF_Dictionary*)m_pDict->Clone(bDirect);
- IFX_FileStream* pFS = NULL;
- if (lpfCallback) {
- pFS = lpfCallback((CPDF_Stream*)this, pUserData);
- }
- if (!pFS) {
- CPDF_StreamAcc acc;
- acc.LoadAllData(this, TRUE);
- FX_DWORD streamSize = acc.GetSize();
- return new CPDF_Stream(acc.DetachData(), streamSize, pCloneDict);
- }
- CPDF_Stream* pObj = new CPDF_Stream(NULL, 0, NULL);
- CPDF_StreamFilter* pSF = GetStreamFilter(TRUE);
- if (pSF) {
- uint8_t* pBuf = FX_Alloc(uint8_t, 4096);
- FX_DWORD dwRead;
- do {
- dwRead = pSF->ReadBlock(pBuf, 4096);
- if (dwRead) {
- pFS->WriteBlock(pBuf, dwRead);
- }
- } while (dwRead == 4096);
- pFS->Flush();
- FX_Free(pBuf);
- delete pSF;
- }
- pObj->InitStream((IFX_FileRead*)pFS, pCloneDict);
- return pObj;
-}
+
extern FX_BOOL PDF_DataDecode(const uint8_t* src_buf,
FX_DWORD src_size,
const CPDF_Dictionary* pDict,
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 04:16:19 +0000