| // 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_FXCODEC_JBIG2_JBIG2_CONTEXT_H_ |
| #define CORE_SRC_FXCODEC_JBIG2_JBIG2_CONTEXT_H_ |
| |
| #include <list> |
| #include <memory> |
| #include <utility> |
| |
| #include "core/include/fpdfapi/fpdf_objects.h" |
| #include "core/include/fxcodec/fx_codec_def.h" |
| #include "core/src/fxcodec/jbig2/JBig2_List.h" |
| #include "core/src/fxcodec/jbig2/JBig2_Page.h" |
| #include "core/src/fxcodec/jbig2/JBig2_Segment.h" |
| |
| class CJBig2_ArithDecoder; |
| class CJBig2_GRDProc; |
| class IFX_Pause; |
| |
| // Cache is keyed by the ObjNum of a stream and an index within the stream. |
| using CJBig2_CacheKey = std::pair<FX_DWORD, FX_DWORD>; |
| // NB: CJBig2_SymbolDict* is owned. |
| using CJBig2_CachePair = std::pair<CJBig2_CacheKey, CJBig2_SymbolDict*>; |
| |
| #define JBIG2_SUCCESS 0 |
| #define JBIG2_FAILED -1 |
| #define JBIG2_ERROR_TOO_SHORT -2 |
| #define JBIG2_ERROR_FATAL -3 |
| #define JBIG2_END_OF_PAGE 2 |
| #define JBIG2_END_OF_FILE 3 |
| #define JBIG2_ERROR_FILE_FORMAT -4 |
| #define JBIG2_ERROR_STREAM_TYPE -5 |
| #define JBIG2_ERROR_LIMIT -6 |
| #define JBIG2_MIN_SEGMENT_SIZE 11 |
| |
| class CJBig2_Context { |
| public: |
| static CJBig2_Context* CreateContext( |
| CPDF_StreamAcc* pGlobalStream, |
| CPDF_StreamAcc* pSrcStream, |
| std::list<CJBig2_CachePair>* pSymbolDictCache, |
| IFX_Pause* pPause = NULL); |
| |
| static void DestroyContext(CJBig2_Context* pContext); |
| |
| int32_t getFirstPage(uint8_t* pBuf, |
| int32_t width, |
| int32_t height, |
| int32_t stride, |
| IFX_Pause* pPause); |
| |
| int32_t Continue(IFX_Pause* pPause); |
| FXCODEC_STATUS GetProcessingStatus() { return m_ProcessingStatus; } |
| |
| private: |
| CJBig2_Context(CPDF_StreamAcc* pGlobalStream, |
| CPDF_StreamAcc* pSrcStream, |
| std::list<CJBig2_CachePair>* pSymbolDictCache, |
| IFX_Pause* pPause, |
| bool bIsGlobal); |
| |
| ~CJBig2_Context(); |
| |
| int32_t decode_SquentialOrgnazation(IFX_Pause* pPause); |
| |
| int32_t decode_EmbedOrgnazation(IFX_Pause* pPause); |
| |
| int32_t decode_RandomOrgnazation_FirstPage(IFX_Pause* pPause); |
| |
| int32_t decode_RandomOrgnazation(IFX_Pause* pPause); |
| |
| CJBig2_Segment* findSegmentByNumber(FX_DWORD dwNumber); |
| |
| CJBig2_Segment* findReferredSegmentByTypeAndIndex(CJBig2_Segment* pSegment, |
| uint8_t cType, |
| int32_t nIndex); |
| |
| int32_t parseSegmentHeader(CJBig2_Segment* pSegment); |
| |
| int32_t parseSegmentData(CJBig2_Segment* pSegment, IFX_Pause* pPause); |
| int32_t ProcessingParseSegmentData(CJBig2_Segment* pSegment, |
| IFX_Pause* pPause); |
| |
| int32_t parseSymbolDict(CJBig2_Segment* pSegment, IFX_Pause* pPause); |
| |
| int32_t parseTextRegion(CJBig2_Segment* pSegment); |
| |
| int32_t parsePatternDict(CJBig2_Segment* pSegment, IFX_Pause* pPause); |
| |
| int32_t parseHalftoneRegion(CJBig2_Segment* pSegment, IFX_Pause* pPause); |
| |
| int32_t parseGenericRegion(CJBig2_Segment* pSegment, IFX_Pause* pPause); |
| |
| int32_t parseGenericRefinementRegion(CJBig2_Segment* pSegment); |
| |
| int32_t parseTable(CJBig2_Segment* pSegment); |
| |
| int32_t parseRegionInfo(JBig2RegionInfo* pRI); |
| |
| JBig2HuffmanCode* decodeSymbolIDHuffmanTable(CJBig2_BitStream* pStream, |
| FX_DWORD SBNUMSYMS); |
| |
| void huffman_assign_code(int* CODES, int* PREFLEN, int NTEMP); |
| |
| void huffman_assign_code(JBig2HuffmanCode* SBSYMCODES, int NTEMP); |
| |
| private: |
| CJBig2_Context* m_pGlobalContext; |
| std::unique_ptr<CJBig2_BitStream> m_pStream; |
| CJBig2_List<CJBig2_Segment> m_SegmentList; |
| CJBig2_List<JBig2PageInfo> m_PageInfoList; |
| std::unique_ptr<CJBig2_Image> m_pPage; |
| size_t m_nSegmentDecoded; |
| bool m_bInPage; |
| bool m_bBufSpecified; |
| int32_t m_PauseStep; |
| IFX_Pause* m_pPause; |
| FXCODEC_STATUS m_ProcessingStatus; |
| std::unique_ptr<CJBig2_ArithDecoder> m_pArithDecoder; |
| std::unique_ptr<CJBig2_GRDProc> m_pGRD; |
| JBig2ArithCtx* m_gbContext; |
| std::unique_ptr<CJBig2_Segment> m_pSegment; |
| FX_DWORD m_dwOffset; |
| JBig2RegionInfo m_ri; |
| std::list<CJBig2_CachePair>* const m_pSymbolDictCache; |
| bool m_bIsGlobal; |
| }; |
| |
| #endif // CORE_SRC_FXCODEC_JBIG2_JBIG2_CONTEXT_H_ |