| #ifndef EXPERIMENTAL_PDFVIEWER_PDFPARSER_NATIVE_SKNATIVEPARSEDPDF_H_ |
| #define EXPERIMENTAL_PDFVIEWER_PDFPARSER_NATIVE_SKNATIVEPARSEDPDF_H_ |
| |
| #include "SkRect.h" |
| #include "SkTDArray.h" |
| |
| class SkCanvas; |
| |
| class SkPdfAllocator; |
| class SkPdfMapper; |
| class SkPdfObject; |
| class SkPdfReal; |
| class SkPdfInteger; |
| class SkPdfString; |
| class SkPdfResourceDictionary; |
| class SkPdfCatalogDictionary; |
| class SkPdfPageObjectDictionary; |
| class SkPdfPageTreeNodeDictionary; |
| |
| |
| |
| class SkPdfNativeTokenizer; |
| |
| class SkNativeParsedPDF { |
| private: |
| struct PublicObjectEntry { |
| long fOffset; |
| // long endOffset; // TODO(edisonn): determine the end of the object, to be used when the doc is corrupted |
| SkPdfObject* fObj; |
| // TODO(edisonn): perf ... probably it does not make sense to cache the ref. test it! |
| SkPdfObject* fResolvedReference; |
| }; |
| |
| public: |
| // TODO(edisonn): read methods: file, stream, http(s)://url, url with seek? |
| // TODO(edisonn): read first page asap, linearized |
| // TODO(edisonn): read page N asap, read all file |
| // TODO(edisonn): allow corruptions of file (e.g. missing endobj, missing stream length, ...) |
| // TODO(edisonn): encryption |
| SkNativeParsedPDF(const char* path); |
| ~SkNativeParsedPDF(); |
| |
| int pages() const; |
| SkPdfResourceDictionary* pageResources(int page); |
| SkRect MediaBox(int page) const; |
| SkPdfNativeTokenizer* tokenizerOfPage(int n) const; |
| |
| SkPdfNativeTokenizer* tokenizerOfStream(SkPdfObject* stream) const; |
| SkPdfNativeTokenizer* tokenizerOfBuffer(unsigned char* buffer, size_t len) const; |
| |
| size_t objects() const; |
| SkPdfObject* object(int i); |
| |
| const SkPdfMapper* mapper() const; |
| SkPdfAllocator* allocator() const; |
| |
| SkPdfReal* createReal(double value) const; |
| SkPdfInteger* createInteger(int value) const; |
| // the string does not own the char* |
| SkPdfString* createString(unsigned char* sz, size_t len) const; |
| |
| void drawPage(int page, SkCanvas* canvas); |
| |
| SkPdfObject* resolveReference(SkPdfObject* ref) const; |
| SkPdfObject* resolveReference(const SkPdfObject* ref) const; |
| |
| private: |
| |
| unsigned char* readCrossReferenceSection(unsigned char* xrefStart, unsigned char* trailerEnd); |
| long readTrailer(unsigned char* trailerStart, unsigned char* trailerEnd, bool storeCatalog); |
| |
| // TODO(edisonn): updates not supported right now, generation ignored |
| void addCrossSectionInfo(int id, int generation, int offset, bool isFreed); |
| static void reset(PublicObjectEntry* obj) { |
| obj->fObj = NULL; |
| obj->fResolvedReference = NULL; |
| obj->fOffset = -1; |
| } |
| |
| SkPdfObject* readObject(int id/*, int generation*/) const; |
| |
| void fillPages(SkPdfPageTreeNodeDictionary* tree); |
| |
| // private fields |
| SkPdfAllocator* fAllocator; |
| SkPdfMapper* fMapper; |
| unsigned char* fFileContent; |
| size_t fContentLength; |
| const SkPdfObject* fRootCatalogRef; |
| SkPdfCatalogDictionary* fRootCatalog; |
| |
| mutable SkTDArray<PublicObjectEntry> fObjects; |
| SkTDArray<SkPdfPageObjectDictionary*> fPages; |
| }; |
| |
| #endif // EXPERIMENTAL_PDFVIEWER_PDFPARSER_NATIVE_SKNATIVEPARSEDPDF_H_ |