Move seg_to to a new header, define SkSegType enum there

include/core/SkPathMeasure.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 SkPathMeasure_DEFINED
 #define SkPathMeasure_DEFINED
 
@@ skipping 77 matching lines @@
     SkScalar        fTolerance;
     SkScalar        fLength;            // relative to the current contour
     int             fFirstPtIndex;      // relative to the current contour
     bool            fIsClosed;          // relative to the current contour
     bool            fForceClosed;
 
     struct Segment {
         SkScalar    fDistance;  // total distance up to this point
         unsigned    fPtIndex; // index into the fPts array
         unsigned    fTValue : 30;
-        unsigned    fType : 2;
+        unsigned    fType : 2;  // actually the enum SkSegType
+                                // See SkPathMeasurePriv.h
 
         SkScalar getScalarT() const;
     };
     SkTDArray<Segment>  fSegments;
     SkTDArray<SkPoint>  fPts; // Points used to define the segments
 
     static const Segment* NextSegment(const Segment*);
 
     void     buildSegments();
     SkScalar compute_quad_segs(const SkPoint pts[3], SkScalar distance,
                                 int mint, int maxt, int ptIndex);
     SkScalar compute_conic_segs(const SkConic&, SkScalar distance,
                                 int mint, const SkPoint& minPt,
                                 int maxt, const SkPoint& maxPt, int ptIndex);
     SkScalar compute_cubic_segs(const SkPoint pts[3], SkScalar distance,
                                 int mint, int maxt, int ptIndex);
     const Segment* distanceToSegment(SkScalar distance, SkScalar* t);
     bool quad_too_curvy(const SkPoint pts[3]);
     bool conic_too_curvy(const SkPoint& firstPt, const SkPoint& midTPt,const SkPoint& lastPt);
     bool cheap_dist_exceeds_limit(const SkPoint& pt, SkScalar x, SkScalar y);
     bool cubic_too_curvy(const SkPoint pts[4]);
 };
 
 #endif