pdfviewer: absolute minimal; to al least render (even if poorly) ICC based color spaces, based on R…

experimental/PdfViewer/pdfparser/native/SkNativeParsedPDF.cpp

 #include "SkNativeParsedPDF.h"
 #include "SkPdfNativeTokenizer.h"
 #include "SkPdfBasics.h"
 #include "SkPdfObject.h"
 
 #include <stdio.h>
 #include <string.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 
@@ skipping 189 matching lines @@
             long dummy;
             current = readTrailer(current, end, true, &dummy, true);
         } else if (token.isKeyword("startxref")) {
             token.reset();
             current = nextObject(0, current, end, &token, NULL, NULL);  // ignore
         }
 
         current = skipPdfWhiteSpaces(0, current, end);
     }
 
+    // TODO(edisonn): hack, detect root catalog - we need to implement liniarized support, and remove this hack.
+    if (!fRootCatalogRef) {
+        for (unsigned int i = 0 ; i < objects(); i++) {
+            SkPdfObject* obj = object(i);
+            SkPdfObject* root = (obj && obj->isDictionary()) ? obj->get("Root") : NULL;
+            if (root && root->isReference()) {
+                fRootCatalogRef = root;
+            }
+        }
+    }
+
+
     if (fRootCatalogRef) {
         fRootCatalog = (SkPdfCatalogDictionary*)resolveReference(fRootCatalogRef);
         if (fRootCatalog->isDictionary() && fRootCatalog->valid()) {
             SkPdfPageTreeNodeDictionary* tree = fRootCatalog->Pages(this);
             if (tree && tree->isDictionary() && tree->valid()) {
                 fillPages(tree);
             }
         }
     }
 
+
 }
 
 // TODO(edisonn): NYI
 SkNativeParsedPDF::~SkNativeParsedPDF() {
     sk_free((void*)fFileContent);
     delete fAllocator;
 }
 
 const unsigned char* SkNativeParsedPDF::readCrossReferenceSection(const unsigned char* xrefStart, const unsigned char* trailerEnd) {
     SkPdfObject xref;
@@ skipping 327 matching lines @@
     return (SkPdfObject*)ref;
 }
 
 size_t SkNativeParsedPDF::bytesUsed() const {
     return fAllocator->bytesUsed() +
            fContentLength +
            fObjects.count() * sizeof(PublicObjectEntry) +
            fPages.count() * sizeof(SkPdfPageObjectDictionary*) +
            sizeof(*this);
 }