High level pdf classes and pdf specific interface.

The guts of the implementation will be in SkPDFDevice and below.  This is a first implementation of everything above that point.

Review URL: http://codereview.appspot.com/2342043

git-svn-id: http://skia.googlecode.com/svn/trunk@602 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 26 insertions, 7 deletions

diff --git a/include/pdf/SkPDFCatalog.h b/include/pdf/SkPDFCatalog.h
index 932f1c895b..6e530db33b 100644
--- a/include/pdf/SkPDFCatalog.h
+++ b/include/pdf/SkPDFCatalog.h
@@ -34,23 +34,39 @@ public:
     ~SkPDFCatalog();
 
     /** Add the passed object to the catalog.
-     *  @param obj        The object to add.
-     *  @param onFirstPage  Is the object on the first page.
+     *  @param obj         The object to add.
+     *  @param onFirstPage Is the object on the first page.
      */
     void addObject(SkPDFObject* obj, bool onFirstPage);
 
+    /** Inform the catalog of the object's position in the final stream.
+     *  The object should already have been added to the catalog.  Returns
+     *  the object's size.
+     *  @param obj         The object to add.
+     *  @param offset      The byte offset in the output stream of this object.
+     */
+    size_t setFileOffset(SkPDFObject* obj, size_t offset);
+
     /** Output the object number for the passed object.
-     *  @param obj        The object of interest.
-     *  @param stream     The writable output stream to send the output to.
+     *  @param obj         The object of interest.
+     *  @param stream      The writable output stream to send the output to.
      */
     void emitObjectNumber(SkWStream* stream, SkPDFObject* obj);
 
     /** Return the number of bytes that would be emitted for the passed
      *  object's object number.
-     *  @param obj        The object of interest
+     *  @param obj         The object of interest
      */
     size_t getObjectNumberSize(SkPDFObject* obj);
 
+    /** Output the cross reference table for objects in the catalog.
+     *  Returns the total number of objects.
+     *  @param stream      The writable output stream to send the output to.
+     *  @param firstPage   If true, include first page objects only, otherwise
+     *                     include all objects not on the first page.
+     */
+    int32_t emitXrefTable(SkWStream* stream, bool firstPage);
+
 private:
     struct Rec {
         Rec(SkPDFObject* object, bool onFirstPage)
@@ -68,9 +84,12 @@ private:
     // TODO(vandebo) Make this a hash if it's a performance problem.
     SkTDArray<struct Rec> fCatalog;
 
+    // Number of objects on the first page.
+    uint32_t fFirstPageCount;
+    // Next object number to assign (on page > 1).
     uint32_t fNextObjNum;
-    bool fStartedAssigningObjNums;
-    bool fAssigningFirstPageObjNums;
+    // Next object number to assign on the first page.
+    uint32_t fNextFirstPageObjNum;
 
     int findObjectIndex(SkPDFObject* obj) const;