skip stroke outset of all teeny lines

src/core/SkStroke.cpp

 /*
  * Copyright 2008 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.
  */
 
 #include "SkStrokerPriv.h"
 #include "SkGeometry.h"
 #include "SkPathPriv.h"
@@ skipping 388 matching lines @@
                 return true;
             case SkPath::kClose_Verb: 
             case SkPath::kDone_Verb:
                 return false;
         }
     }
     return false;
 }
 
 void SkPathStroker::lineTo(const SkPoint& currPt, const SkPath::Iter* iter) {
-    if (SkStrokerPriv::CapFactory(SkPaint::kButt_Cap) == fCapper
-            && fPrevPt.equalsWithinTolerance(currPt, SK_ScalarNearlyZero * fInvResScale)) {
+    bool teenyLine = fPrevPt.equalsWithinTolerance(currPt, SK_ScalarNearlyZero * fInvResScale);
+    if (SkStrokerPriv::CapFactory(SkPaint::kButt_Cap) == fCapper && teenyLine) {
         return;
     }
-    if (fPrevPt == currPt && (fJoinCompleted || (iter && has_valid_tangent(iter)))) {
+    if (teenyLine && (fJoinCompleted || (iter && has_valid_tangent(iter)))) {
         return;
     }
     SkVector    normal, unitNormal;
 
     if (!this->preJoinTo(currPt, &normal, &unitNormal, true)) {
         return;
     }
     this->line_to(currPt, normal);
     this->postJoinTo(currPt, normal, unitNormal);
 }
@@ skipping 1107 matching lines @@
         default:
             break;
     }
 
     if (fWidth < SkMinScalar(rw, rh) && !fDoFill) {
         r = rect;
         r.inset(radius, radius);
         dst->addRect(r, reverse_direction(dir));
     }
 }