Use vertex attributes for dash effect in gpu

src/core/SkStrokeRec.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkStrokeRec.h"
 #include "SkPaintDefaults.h"
 
 // must be < 0, since ==0 means hairline, and >0 means normal stroke
 #define kStrokeRec_FillStyleWidth     (-SK_Scalar1)
 
 SkStrokeRec::SkStrokeRec(InitStyle s) {
     fWidth          = (kFill_InitStyle == s) ? kStrokeRec_FillStyleWidth : 0;
     fMiterLimit     = SkPaintDefaults_MiterLimit;
     fCap            = SkPaint::kDefault_Cap;
     fJoin           = SkPaint::kDefault_Join;
     fStrokeAndFill  = false;
 }
 
 SkStrokeRec::SkStrokeRec(const SkStrokeRec& src) {
     memcpy(this, &src, sizeof(src));
 }
 
 SkStrokeRec::SkStrokeRec(const SkPaint& paint) {
-    switch (paint.getStyle()) {
+    this->init(paint, paint.getStyle());
+}
+
+SkStrokeRec::SkStrokeRec(const SkPaint& paint, SkPaint::Style styleOverride) {
+    this->init(paint, styleOverride);
+}
+
+void SkStrokeRec::init(const SkPaint& paint, SkPaint::Style style) {
+    switch (style) {
         case SkPaint::kFill_Style:
             fWidth = kStrokeRec_FillStyleWidth;
             fStrokeAndFill = false;
             break;
         case SkPaint::kStroke_Style:
             fWidth = paint.getStrokeWidth();
             fStrokeAndFill = false;
             break;
         case SkPaint::kStrokeAndFill_Style:
             if (0 == paint.getStrokeWidth()) {
@@ skipping 58 matching lines @@
 
     SkStroke stroker;
     stroker.setCap(fCap);
     stroker.setJoin(fJoin);
     stroker.setMiterLimit(fMiterLimit);
     stroker.setWidth(fWidth);
     stroker.setDoFill(fStrokeAndFill);
     stroker.strokePath(src, dst);
     return true;
 }