pdfviewer: add --pages arg: render a certain page (all, all in desceding order, firsl, last and by …

experimental/PdfViewer/pdfparser/native/SkNativeParsedPDF.h

 #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;
@@ skipping 44 matching lines @@
     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(const SkPdfObject* ref);
 
     // Reports an approximation of all the memory usage.
-    size_t bytesUsed();
+    size_t bytesUsed() 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;
@@ skipping 11 matching lines @@
     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_