[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, 10 insertions, 3 deletions

diff --git a/include/pdf/SkPDFDocument.h b/include/pdf/SkPDFDocument.h
index 5fb7c95405..1a5d8354e9 100644
--- a/include/pdf/SkPDFDocument.h
+++ b/include/pdf/SkPDFDocument.h
@@ -17,11 +17,12 @@
 #ifndef SkPDFDocument_DEFINED
 #define SkPDFDocument_DEFINED
 
-#include "SkPDFCatalog.h"
 #include "SkPDFTypes.h"
 #include "SkRefCnt.h"
 #include "SkTDArray.h"
+#include "SkTScopedPtr.h"
 
+class SkPDFCatalog;
 class SkPDFDevice;
 class SkPDFPage;
 class SkWSteam;
@@ -32,9 +33,15 @@ class SkWSteam;
 */
 class SkPDFDocument {
 public:
+    enum Flags {
+        kNoCompression_Flag = 0x01,  //!< mask disable stream compression.
+        kNoEmbedding_Flag   = 0x02,  //!< mask do not embed fonts.
+
+        kDraftMode_Flags    = 0x03,
+    };
     /** Create a PDF document.
      */
-    SK_API SkPDFDocument();
+    explicit SK_API SkPDFDocument(Flags flags = (Flags)0);
     SK_API ~SkPDFDocument();
 
     /** Output the PDF to the passed stream.  It is an error to call this (it
@@ -67,7 +74,7 @@ public:
     SK_API const SkTDArray<SkPDFPage*>& getPages();
 
 private:
-    SkPDFCatalog fCatalog;
+    SkTScopedPtr<SkPDFCatalog> fCatalog;
     int64_t fXRefFileOffset;
 
     SkTDArray<SkPDFPage*> fPages;