Add special case circle blur for Ganesh

src/core/SkMaskFilter.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 "SkMaskFilter.h"
@@ skipping 291 matching lines @@
 SkMaskFilter::filterRectsToNine(const SkRect[], int count, const SkMatrix&,
                                 const SkIRect& clipBounds, NinePatch*) const {
     return kUnimplemented_FilterReturn;
 }
 
 #if SK_SUPPORT_GPU
 bool SkMaskFilter::asFragmentProcessor(GrFragmentProcessor**, GrTexture*, const SkMatrix&) const {
     return false;
 }
 
-bool SkMaskFilter::canFilterMaskGPU(const SkRect& devBounds,
+bool SkMaskFilter::canFilterMaskGPU(const SkRRect& devRRect,
                                     const SkIRect& clipBounds,
                                     const SkMatrix& ctm,
                                     SkRect* maskRect) const {
     return false;
 }
 
  bool SkMaskFilter::directFilterMaskGPU(GrTextureProvider* texProvider,
                                         GrDrawContext* drawContext,
                                         GrRenderTarget* rt,
                                         GrPaint* grp,
@@ skipping 33 matching lines @@
     srcM.fRowBytes = 0;
     srcM.fFormat = SkMask::kA8_Format;
 
     SkIPoint margin;    // ignored
     if (this->filterMask(&dstM, srcM, SkMatrix::I(), &margin)) {
         dst->set(dstM.fBounds);
     } else {
         dst->set(srcM.fBounds);
     }
 }