| // Copyright 2016 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_FXCODEC_JBIG2_JBIG2_DOCUMENTCONTEXT_H_ |
| #define CORE_FXCODEC_JBIG2_JBIG2_DOCUMENTCONTEXT_H_ |
| |
| #include <list> |
| #include <memory> |
| #include <utility> |
| |
| class CJBig2_SymbolDict; |
| |
| // Cache is keyed by both the key of a stream and an index within the stream. |
| using CJBig2_CompoundKey = std::pair<uint64_t, uint32_t>; |
| using CJBig2_CachePair = |
| std::pair<CJBig2_CompoundKey, std::unique_ptr<CJBig2_SymbolDict>>; |
| |
| // Holds per-document JBig2 related data. |
| class JBig2_DocumentContext { |
| public: |
| JBig2_DocumentContext(); |
| ~JBig2_DocumentContext(); |
| |
| std::list<CJBig2_CachePair>* GetSymbolDictCache() { |
| return &m_SymbolDictCache; |
| } |
| |
| private: |
| std::list<CJBig2_CachePair> m_SymbolDictCache; |
| }; |
| |
| #endif // CORE_FXCODEC_JBIG2_JBIG2_DOCUMENTCONTEXT_H_ |