Add Lua SkXfermode skp scraping support

include/core/SkXfermode.h

 
 /*
  * Copyright 2006 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 SkXfermode_DEFINED
 #define SkXfermode_DEFINED
 
 #include "SkFlattenable.h"
 #include "SkColor.h"
+#include "SkString.h"
 
 class GrFragmentProcessor;
 class GrTexture;
 class GrXPFactory;
 class SkString;
 
 /** \class SkXfermode
  *
  *  SkXfermode is the base class for objects that are called to implement custom
  *  "transfer-modes" in the drawing pipeline. The static function Create(Modes)
@@ skipping 209 matching lines @@
     /** The default implementation of xfer32/xfer16/xferA8 in turn call this
         method, 1 color at a time (upscaled to a SkPMColor). The default
         implementation of this method just returns dst. If performance is
         important, your subclass should override xfer32/xfer16/xferA8 directly.
 
         This method will not be called directly by the client, so it need not
         be implemented if your subclass has overridden xfer32/xfer16/xferA8
     */
     virtual SkPMColor xferColor(SkPMColor src, SkPMColor dst) const;
 
+    /**
+     *  luaGetName should only be used for lua-based .skp scraping.
+     */
+    friend class SkLuaAccess;
+    virtual void luaGetName(SkString* name) const { name->set("Unknown"); }

[reed1, 2016/01/21 14:39:11]

can this be private?

+
 private:
     enum {
         kModeCount = kLastMode + 1
     };
 
     typedef SkFlattenable INHERITED;
 };
 
 #endif