experiment with zero-length round capped line segments

src/utils/SkDashPath.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkDashPathPriv.h"
 #include "SkPathMeasure.h"
 
@@ skipping 254 matching lines @@
         }
 
         // Using double precision to avoid looping indefinitely due to single precision rounding
         // (for extreme path_length/dash_length ratios). See test_infinite_dash() unittest.
         double  distance = 0;
         double  dlen = initialDashLength;
 
         while (distance < length) {
             SkASSERT(dlen >= 0);
             addedSegment = false;
-            if (is_even(index) && dlen > 0 && !skipFirstSegment) {
+            if (is_even(index) && !skipFirstSegment) {
                 addedSegment = true;
                 ++segCount;
 
                 if (specialLine) {
                     lineRec.addSegment(SkDoubleToScalar(distance),
                                        SkDoubleToScalar(distance + dlen),
                                        dst);
                 } else {
                     meas.getSegment(SkDoubleToScalar(distance),
                                     SkDoubleToScalar(distance + dlen),
@@ skipping 34 matching lines @@
 bool SkDashPath::FilterDashPath(SkPath* dst, const SkPath& src, SkStrokeRec* rec,
                                 const SkRect* cullRect, const SkPathEffect::DashInfo& info) {
     SkScalar initialDashLength = 0;
     int32_t initialDashIndex = 0;
     SkScalar intervalLength = 0;
     CalcDashParameters(info.fPhase, info.fIntervals, info.fCount,
                        &initialDashLength, &initialDashIndex, &intervalLength);
     return FilterDashPath(dst, src, rec, cullRect, info.fIntervals, info.fCount, initialDashLength,
                           initialDashIndex, intervalLength);
 }