Implement default programs and implement defaults and parents for imports.
diff --git a/rsProgramVertex.h b/rsProgramVertex.h
index 0b3a3eb..1a92f01 100644
--- a/rsProgramVertex.h
+++ b/rsProgramVertex.h
@@ -57,6 +57,11 @@
     ProgramVertexState();
     ~ProgramVertexState();
 
+    void init(Context *rsc, int32_t w, int32_t h);
+
+    ObjectBaseRef<ProgramVertex> mDefault;
+    ObjectBaseRef<Allocation> mDefaultAlloc;
+
     ProgramVertex *mPV;
 
     //ObjectBaseRef<Type> mTextureTypes[ProgramFragment::MAX_TEXTURE];