add textblobs to lua

include/utils/SkTextBox.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 SkTextBox_DEFINED
@@ skipping 42 matching lines @@
     void    getSpacing(SkScalar* mul, SkScalar* add) const;
     void    setSpacing(SkScalar mul, SkScalar add);
 
     void    draw(SkCanvas*, const char text[], size_t len, const SkPaint&);
 
     void    setText(const char text[], size_t len, const SkPaint&);
     void    draw(SkCanvas*);
     int     countLines() const;
     SkScalar getTextHeight() const;
 
+    SkTextBlob* snapshotTextBlob(SkScalar* computedBottom) const;
+
+    class Visitor {
+    public:
+        virtual ~Visitor() {}
+        virtual void operator()(const char*, size_t, SkScalar x, SkScalar y, const SkPaint&) = 0;
+    };
+    
 private:
     SkRect      fBox;
     SkScalar    fSpacingMul, fSpacingAdd;
     uint8_t     fMode, fSpacingAlign;
     const char* fText;
     size_t      fLen;
     const SkPaint* fPaint;
+
+    SkScalar visit(Visitor&, const char text[], size_t len, const SkPaint&) const;
 };
 
 class SkTextLineBreaker {
 public:
     static int CountLines(const char text[], size_t len, const SkPaint&, SkScalar width);
 };
 
 #endif