Use size of SkRect as the key for blur mask cache

src/effects/SkBlurMaskFilter.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 "SkBlurMaskFilter.h"
 #include "SkBlurMask.h"
@@ skipping 534 matching lines @@
     if (smallR[0].width() < 2 || smallR[0].height() < 2) {
         return kUnimplemented_FilterReturn;
     }
     if (2 == count) {
         smallR[1].set(rects[1].left(), rects[1].top(),
                       rects[1].right() - dx, rects[1].bottom() - dy);
         SkASSERT(!smallR[1].isEmpty());
     }
 
     const SkScalar sigma = this->computeXformedSigma(matrix);
-    if (!find_cached_rects(&patch->fMask, sigma, fBlurStyle, this->getQuality(), rects, count)) {
+    if (!find_cached_rects(&patch->fMask, sigma, fBlurStyle, this->getQuality(), smallR, count)) {
         if (count > 1 || !c_analyticBlurNinepatch) {
             if (!draw_rects_into_mask(smallR, count, &srcM)) {
                 return kFalse_FilterReturn;
             }
 
             SkAutoMaskFreeImage amf(srcM.fImage);
 
             if (!this->filterMask(&patch->fMask, srcM, matrix, &margin)) {
                 return kFalse_FilterReturn;
             }
         } else {
             if (!this->filterRectMask(&patch->fMask, smallR[0], matrix, &margin,
                                       SkMask::kComputeBoundsAndRenderImage_CreateMode)) {
                 return kFalse_FilterReturn;
             }
         }
-        add_cached_rects(patch->fMask, sigma, fBlurStyle, this->getQuality(), rects, count);
+        add_cached_rects(patch->fMask, sigma, fBlurStyle, this->getQuality(), smallR, count);
     }
     patch->fMask.fBounds.offsetTo(0, 0);
     patch->fOuterRect = dstM.fBounds;
     patch->fCenter = center;
     return kTrue_FilterReturn;
 }
 
 void SkBlurMaskFilterImpl::computeFastBounds(const SkRect& src,
                                              SkRect* dst) const {
     SkScalar pad = 3.0f * fSigma;
@@ skipping 696 matching lines @@
     } else {
         str->append("None");
     }
     str->append("))");
 }
 #endif
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkBlurMaskFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkBlurMaskFilterImpl)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END