wip for drawables

include/core/SkPicture.h

Index: include/core/SkPicture.h
diff --git a/include/core/SkPicture.h b/include/core/SkPicture.h
index 4bef2b0d2f88a0541813eec4f585e300a7728c28..4a021b9824010a4f6cb2855303802a75c4fcded3 100644
--- a/include/core/SkPicture.h
+++ b/include/core/SkPicture.h
@@ -283,15 +283,24 @@ private:
 
     typedef SkRefCnt INHERITED;
 
-    // Takes ownership of the SkRecord, refs the (optional) BBH.
-    SkPicture(SkScalar width, SkScalar height, SkRecord*, SkBBoxHierarchy*);
+    // Takes ownership of the SkRecord, refs the (optional) drawablePicts and BBH.
+    SkPicture(SkScalar width, SkScalar height, SkRecord*, SkData* drawablePicts,
+              SkBBoxHierarchy*);
     // Return as a new SkPicture that's backed by SkRecord.
     static SkPicture* Forwardport(const SkPicture&);
     // Return as a new SkPicture that's backed by the old backend.
-    static SkPicture* Backport(const SkRecord& src, const SkRect& cullRect);
+    static SkPicture* Backport(const SkRecord& src,
+                               SkPicture* const drawablePicts[], int drawableCount,
+                               const SkRect& cullRect);
 
     SkAutoTDelete<SkRecord>       fRecord;
     SkAutoTUnref<SkBBoxHierarchy> fBBH;
+    SkAutoTUnref<SkData>          fDrawablePicts;
+
+    // helpers for fDrawablePicts
+    int drawableCount() const;
+    // will return NULL if drawableCount() returns 0
+    SkPicture* const* drawablePicts() const;
 
     struct PathCounter;