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

src/effects/SkDashPathEffect.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 "SkDashPathEffect.h"
@@ skipping 511 matching lines @@
             results->fLast.addRect(x - halfWidth, y - halfHeight,
                                    x + halfWidth, y + halfHeight);
         }
 
         SkASSERT(curPt == results->fNumPoints);
     }
 
     return true;
 }
 
+SkPathEffect::DashType SkDashPathEffect::asADash(DashInfo* info) const {
+    if (info) {
+       if (info->fCount >= fCount) {
+            if (info->fIntervals) {
+                memcpy(info->fIntervals, fIntervals, fCount * sizeof(SkScalar));
+            }
+       }
+       info->fCount = fCount;
+       info->fInitialDashLength = fInitialDashLength;
+       info->fInitialDashIndex = fInitialDashIndex;
+       info->fIntervalLength = fIntervalLength;
+       info->fScaleToFit = fScaleToFit;
+    }
+    if (2 == fCount) {
+        return kTwoInterval_DashType;
+    } else {
+        return kMultipleInterval_DashType;
+    }
+}
+
 SkFlattenable::Factory SkDashPathEffect::getFactory() const {
     return CreateProc;
 }
 
 void SkDashPathEffect::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     buffer.writeInt(fInitialDashIndex);
     buffer.writeScalar(fInitialDashLength);
     buffer.writeScalar(fIntervalLength);
     buffer.writeBool(fScaleToFit);
@@ skipping 12 matching lines @@
 
     fCount = buffer.getArrayCount();
     size_t allocSize = sizeof(SkScalar) * fCount;
     if (buffer.validateAvailable(allocSize)) {
         fIntervals = (SkScalar*)sk_malloc_throw(allocSize);
         buffer.readScalarArray(fIntervals, fCount);
     } else {
         fIntervals = NULL;
     }
 }