Batch multiple single NVPR draw paths to instanced draws

src/gpu/gl/GrGLPath.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 "GrGLPath.h"
 #include "GrGLPathRendering.h"
 #include "GrGLGpu.h"
@@ skipping 315 matching lines @@
             InitPathObjectStroke(gpu, fPathID, *stroke);
 
             // FIXME: try to account for stroking, without rasterizing the stroke.
             fBounds.outset(stroke->getWidth(), stroke->getWidth());
         }
     }
 
     this->registerWithCache(SkBudgeted::kYes);
 }
 
+bool GrGLPath::canCombineDrawPathBatchWith(const GrPath& o) const {
+    const GrGLPath* other = static_cast<const GrGLPath*>(&o);
+    return fShouldStroke == other->fShouldStroke &&
+            fShouldFill == other->fShouldFill;
+}
+
 void GrGLPath::onRelease() {
     if (0 != fPathID) {
         static_cast<GrGLGpu*>(this->getGpu())->glPathRendering()->deletePaths(fPathID, 1);
         fPathID = 0;
     }
 
     INHERITED::onRelease();
 }
 
 void GrGLPath::onAbandon() {
     fPathID = 0;
 
     INHERITED::onAbandon();
 }