Add asADash entry point into SkPathEffect to allow extracting Dash info from PathEffects

src/core/SkPathEffect.cpp

 
 /*
  * 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.
  */
 
 #include "SkPathEffect.h"
 #include "SkPath.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
 
 ///////////////////////////////////////////////////////////////////////////////
 
 void SkPathEffect::computeFastBounds(SkRect* dst, const SkRect& src) const {
     *dst = src;
 }
 
 bool SkPathEffect::asPoints(PointData* results, const SkPath& src,
                     const SkStrokeRec&, const SkMatrix&, const SkRect*) const {
     return false;
 }
 
+SkPathEffect::DashType SkPathEffect::asADash(DashInfo* info) const {
+    return kNone_DashType;
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 SkPairPathEffect::SkPairPathEffect(SkPathEffect* pe0, SkPathEffect* pe1)
         : fPE0(pe0), fPE1(pe1) {
     SkASSERT(pe0);
     SkASSERT(pe1);
     fPE0->ref();
     fPE1->ref();
 }
 
@@ skipping 36 matching lines @@
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 bool SkSumPathEffect::filterPath(SkPath* dst, const SkPath& src,
                              SkStrokeRec* rec, const SkRect* cullRect) const {
     // use bit-or so that we always call both, even if the first one succeeds
     return fPE0->filterPath(dst, src, rec, cullRect) |
            fPE1->filterPath(dst, src, rec, cullRect);
 }