allow move/zero-line/close to draw caps

include/core/SkPath.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 SkPath_DEFINED
 #define SkPath_DEFINED
 
@@ skipping 1125 matching lines @@
     //
     inline void injectMoveToIfNeeded();
 
     inline bool hasOnlyMoveTos() const;
 
     Convexity internalGetConvexity() const;
 
     bool isRectContour(bool allowPartial, int* currVerb, const SkPoint** pts,
                        bool* isClosed, Direction* direction) const;
 
+    // called by stroker to see if all points are equal and worthy of a cap
+    // equivalent to a short-circuit version of getBounds().isEmpty() 
+    bool isZeroLength() const;
+
     /** Returns if the path can return a bound at no cost (true) or will have to
         perform some computation (false).
      */
     bool hasComputedBounds() const {
         SkDEBUGCODE(this->validate();)
         return fPathRef->hasComputedBounds();
     }
 
 
     // 'rect' needs to be sorted
     void setBounds(const SkRect& rect) {
         SkPathRef::Editor ed(&fPathRef);
 
         ed.setBounds(rect);
     }
 
     void setPt(int index, SkScalar x, SkScalar y);
 
     friend class SkAutoPathBoundsUpdate;
     friend class SkAutoDisableOvalCheck;
     friend class SkAutoDisableDirectionCheck;
     friend class SkBench_AddPathTest; // perf test reversePathTo
     friend class PathTest_Private; // unit test reversePathTo
     friend class ForceIsRRect_Private; // unit test isRRect
 };
 
 #endif