default SkPixelSerializer

include/core/SkImageEncoder.h

Index: include/core/SkImageEncoder.h
diff --git a/include/core/SkImageEncoder.h b/include/core/SkImageEncoder.h
index fc999dcc189d4177de70c6b0a4810bb1e0165de1..bb3341f836ec330b6b04fa0baf51c6021a83afdc 100644
--- a/include/core/SkImageEncoder.h
+++ b/include/core/SkImageEncoder.h
@@ -12,6 +12,8 @@
 #include "SkTRegistry.h"
 
 class SkBitmap;
+class SkPixelSerializer;
+class SkPixmap;
 class SkData;
 class SkWStream;
 
@@ -64,11 +66,17 @@ public:
                               Type, int quality);
     static SkData* EncodeData(const SkBitmap&, Type, int quality);
 
+    static SkData* EncodeData(const SkPixmap&, Type, int quality);
+
     static bool EncodeFile(const char file[], const SkBitmap&, Type,
                            int quality);
     static bool EncodeStream(SkWStream*, const SkBitmap&, Type,
                            int quality);
 
+    /** Uses SkImageEncoder to serialize images that are not already
+        encoded as SkImageEncoder::kPNG_Type images. */
+    static SkPixelSerializer* CreatePixelSerializer();
+
 protected:
     /**
      * Encode bitmap 'bm' in the desired format, writing results to