SkPdfNativeDoc.h revision 7b328fddf94eea5f05ffa36de02d7d9922f504da
13aac1f9f308192f3787265830fe86ce8874e7382edisonn@google.com#ifndef EXPERIMENTAL_PDFVIEWER_PDFPARSER_NATIVE_SKNATIVEPARSEDPDF_H_ 23aac1f9f308192f3787265830fe86ce8874e7382edisonn@google.com#define EXPERIMENTAL_PDFVIEWER_PDFPARSER_NATIVE_SKNATIVEPARSEDPDF_H_ 33aac1f9f308192f3787265830fe86ce8874e7382edisonn@google.com 4571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com#include "SkRect.h" 5571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com#include "SkTDArray.h" 6571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 7571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.comclass SkCanvas; 8571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 9571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.comclass SkPdfAllocator; 10571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.comclass SkPdfMapper; 11571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.comclass SkPdfObject; 12571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.comclass SkPdfReal; 13571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.comclass SkPdfInteger; 14571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.comclass SkPdfString; 15571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.comclass SkPdfResourceDictionary; 16571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.comclass SkPdfCatalogDictionary; 17571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.comclass SkPdfPageObjectDictionary; 18571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.comclass SkPdfPageTreeNodeDictionary; 19571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 20571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.comclass SkPdfNativeTokenizer; 21571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 22571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.comclass SkNativeParsedPDF { 23571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.comprivate: 24571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com struct PublicObjectEntry { 25571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com long fOffset; 26571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com // long endOffset; // TODO(edisonn): determine the end of the object, to be used when the doc is corrupted 27571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com SkPdfObject* fObj; 28571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com // TODO(edisonn): perf ... probably it does not make sense to cache the ref. test it! 29571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com SkPdfObject* fResolvedReference; 30571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com }; 313aac1f9f308192f3787265830fe86ce8874e7382edisonn@google.com 323aac1f9f308192f3787265830fe86ce8874e7382edisonn@google.compublic: 33571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com // TODO(edisonn): read methods: file, stream, http(s)://url, url with seek? 34571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com // TODO(edisonn): read first page asap, linearized 35571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com // TODO(edisonn): read page N asap, read all file 36571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com // TODO(edisonn): allow corruptions of file (e.g. missing endobj, missing stream length, ...) 37571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com // TODO(edisonn): encryption 38571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com SkNativeParsedPDF(const char* path); 39571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com ~SkNativeParsedPDF(); 40571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 41571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com int pages() const; 42571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com SkPdfResourceDictionary* pageResources(int page); 43951d6532de49003cd5a43f57caf91dd6d3efc33eedisonn@google.com SkRect MediaBox(int page); 44951d6532de49003cd5a43f57caf91dd6d3efc33eedisonn@google.com SkPdfNativeTokenizer* tokenizerOfPage(int n); 45571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 46951d6532de49003cd5a43f57caf91dd6d3efc33eedisonn@google.com SkPdfNativeTokenizer* tokenizerOfStream(SkPdfObject* stream); 47951d6532de49003cd5a43f57caf91dd6d3efc33eedisonn@google.com SkPdfNativeTokenizer* tokenizerOfBuffer(unsigned char* buffer, size_t len); 48571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 49571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com size_t objects() const; 50571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com SkPdfObject* object(int i); 51571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 52571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com const SkPdfMapper* mapper() const; 53571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com SkPdfAllocator* allocator() const; 54571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 55571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com SkPdfReal* createReal(double value) const; 56571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com SkPdfInteger* createInteger(int value) const; 57571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com // the string does not own the char* 58571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com SkPdfString* createString(unsigned char* sz, size_t len) const; 59571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 60571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com void drawPage(int page, SkCanvas* canvas); 61571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 62951d6532de49003cd5a43f57caf91dd6d3efc33eedisonn@google.com SkPdfObject* resolveReference(const SkPdfObject* ref); 63571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 64a5aaa7998fc18489701660f781d7daa33ffc6f6eedisonn@google.com // Reports an approximation of all the memory usage. 657b328fddf94eea5f05ffa36de02d7d9922f504daedisonn@google.com size_t bytesUsed() const; 66a5aaa7998fc18489701660f781d7daa33ffc6f6eedisonn@google.com 67571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.comprivate: 68571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 69571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com unsigned char* readCrossReferenceSection(unsigned char* xrefStart, unsigned char* trailerEnd); 70571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com long readTrailer(unsigned char* trailerStart, unsigned char* trailerEnd, bool storeCatalog); 71571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 72571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com // TODO(edisonn): updates not supported right now, generation ignored 73571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com void addCrossSectionInfo(int id, int generation, int offset, bool isFreed); 74571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com static void reset(PublicObjectEntry* obj) { 75571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com obj->fObj = NULL; 76571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com obj->fResolvedReference = NULL; 77571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com obj->fOffset = -1; 78571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com } 79571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 80951d6532de49003cd5a43f57caf91dd6d3efc33eedisonn@google.com SkPdfObject* readObject(int id/*, int generation*/); 81571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 82571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com void fillPages(SkPdfPageTreeNodeDictionary* tree); 83571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 84571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com // private fields 85571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com SkPdfAllocator* fAllocator; 86571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com SkPdfMapper* fMapper; 87571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com unsigned char* fFileContent; 88571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com size_t fContentLength; 89571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com const SkPdfObject* fRootCatalogRef; 90571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com SkPdfCatalogDictionary* fRootCatalog; 91571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com 92571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com mutable SkTDArray<PublicObjectEntry> fObjects; 93571c70b95f56e22b5a7d6f4f288aa6c9a925a64fedisonn@google.com SkTDArray<SkPdfPageObjectDictionary*> fPages; 943aac1f9f308192f3787265830fe86ce8874e7382edisonn@google.com}; 953aac1f9f308192f3787265830fe86ce8874e7382edisonn@google.com 963aac1f9f308192f3787265830fe86ce8874e7382edisonn@google.com#endif // EXPERIMENTAL_PDFVIEWER_PDFPARSER_NATIVE_SKNATIVEPARSEDPDF_H_ 97