[PDF] Make stream compression optional on a per device basis.

There are a lot of small pieces to make this change work:
- SkPDFDocument (and SkPDFCatalog) take flags to disable compression (and font embedding - not implemented yet, can disable font subsetting for now).
- SkPDFStream now defers compression until the size/emit step.
- Classes that *had* a stream (because they didn't know the stream size at construction time) now *are* streams to make the substitution work correctly.
- The SkPDFShader implementation got pulled apart into two classes, one that is a SkPDFDict, and one that is a SkPDFStream (making the common ancestor SkPDFObject).
- Added helper methods in SkPDFObject for children that have simple resource lists.
- Added an iterator to SkPDFDict so that a substitute SkPDFStream can get a copy of the stream dictionary.
- Change SkPDFDocument to have a pointer to an SkPDFCatalog to remove a new circular header reference.

Review URL: http://codereview.appspot.com/4700045

git-svn-id: http://skia.googlecode.com/svn/trunk@1911 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 8 insertions, 1 deletions

diff --git a/include/pdf/SkPDFCatalog.h b/include/pdf/SkPDFCatalog.h
index 4f8f8c1ece..3a644e6a5a 100644
--- a/include/pdf/SkPDFCatalog.h
+++ b/include/pdf/SkPDFCatalog.h
@@ -19,6 +19,7 @@
 
 #include <sys/types.h>
 
+#include "SkPDFDocument.h"
 #include "SkPDFTypes.h"
 #include "SkRefCnt.h"
 #include "SkTDArray.h"
@@ -32,7 +33,7 @@ class SK_API SkPDFCatalog {
 public:
     /** Create a PDF catalog.
      */
-    SkPDFCatalog();
+    explicit SkPDFCatalog(SkPDFDocument::Flags flags);
     ~SkPDFCatalog();
 
     /** Add the passed object to the catalog.  Refs obj.
@@ -62,6 +63,10 @@ public:
      */
     size_t getObjectNumberSize(SkPDFObject* obj);
 
+    /** Return the document flags in effect for this catalog/document.
+     */
+    SkPDFDocument::Flags getDocumentFlags() const { return fDocumentFlags; }
+
     /** 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.
@@ -127,6 +132,8 @@ private:
     // Next object number to assign on the first page.
     uint32_t fNextFirstPageObjNum;
 
+    SkPDFDocument::Flags fDocumentFlags;
+
     int findObjectIndex(SkPDFObject* obj) const;
 
     int assignObjNum(SkPDFObject* obj);