Use Analytic AA in SkAAClip

src/core/SkBitmapDevice.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapDevice.h"
 #include "SkConfig8888.h"
 #include "SkDraw.h"
@@ skipping 379 matching lines @@
 
     SkImageFilter* filter = paint.getImageFilter();
     if (filter) {
         SkIPoint offset = SkIPoint::Make(0, 0);
         SkMatrix matrix = *draw.fMatrix;
         matrix.postTranslate(SkIntToScalar(-x), SkIntToScalar(-y));
         const SkIRect clipBounds = draw.fRC->getBounds().makeOffset(-x, -y);
         SkAutoTUnref<SkImageFilterCache> cache(this->getImageFilterCache());
         SkImageFilter::OutputProperties outputProperties(fBitmap.colorSpace());
         SkImageFilter::Context ctx(matrix, clipBounds, cache.get(), outputProperties);
-        
+
         sk_sp<SkSpecialImage> resultImg(filter->filterImage(srcImg, ctx, &offset));
         if (resultImg) {
             SkPaint tmpUnfiltered(paint);
             tmpUnfiltered.setImageFilter(nullptr);
             if (resultImg->getROPixels(&resultBM)) {
                 this->drawSprite(draw, resultBM, x + offset.x(), y + offset.y(), tmpUnfiltered);
             }
         }
     } else {
         if (srcImg->getROPixels(&resultBM)) {
@@ skipping 34 matching lines @@
         paint.getRasterizer() ||
         paint.getPathEffect() ||
         paint.isFakeBoldText() ||
         paint.getStyle() != SkPaint::kFill_Style ||
         !paint.isSrcOver())
     {
         return true;
     }
     return false;
 }