change offset to xy for pixelref subsetting

include/core/SkPicture.h

 
 /*
  * Copyright 2007 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkPicture_DEFINED
@@ skipping 154 matching lines @@
         reflect the bounds of what has been recorded into the picture.
         @return the height of the picture's recording canvas
     */
     int height() const { return fHeight; }
 
     /**
      *  Function to encode an SkBitmap to an SkData. A function with this
      *  signature can be passed to serialize() and SkOrderedWriteBuffer.
      *  Returning NULL will tell the SkOrderedWriteBuffer to use
      *  SkBitmap::flatten() to store the bitmap.
-     *  @param pixelRefOffset Output parameter, telling the deserializer what
-     *      offset in the bm's pixelRef corresponds to the encoded data.
+     *
+     *  @param pixelRefOffset DEPRECATED -- caller assumes it will return 0.
      *  @return SkData If non-NULL, holds encoded data representing the passed
      *      in bitmap. The caller is responsible for calling unref().
      */
     typedef SkData* (*EncodeBitmap)(size_t* pixelRefOffset, const SkBitmap& bm);
 
     /**
      *  Serialize to a stream. If non NULL, encoder will be used to encode
      *  any bitmaps in the picture.
      *  encoder will never be called with a NULL pixelRefOffset.
      */
@@ skipping 78 matching lines @@
  */
 class SK_API SkDrawPictureCallback {
 public:
     SkDrawPictureCallback() {}
     virtual ~SkDrawPictureCallback() {}
 
     virtual bool abortDrawing() = 0;
 };
 
 #endif