Implement a computeFastBounds() traversal for SkImageFilter. This allows for correct culling of pri…

src/core/SkPaint.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 "SkPaint.h"
 #include "SkAnnotation.h"
@@ skipping 2270 matching lines @@
         storage->set(src->fLeft - radius, src->fTop - radius,
                      src->fRight + radius, src->fBottom + radius);
     } else {
         *storage = *src;
     }
 
     if (this->getMaskFilter()) {
         this->getMaskFilter()->computeFastBounds(*storage, storage);
     }
 
+    if (this->getImageFilter()) {
+        this->getImageFilter()->computeFastBounds(*storage, storage);
+    }
+
     return *storage;
 }
 
 #ifdef SK_DEVELOPER
 void SkPaint::toString(SkString* str) const {
     str->append("<dl><dt>SkPaint:</dt><dd><dl>");
 
     SkTypeface* typeface = this->getTypeface();
     if (NULL != typeface) {
         SkDynamicMemoryWStream ostream;
@@ skipping 276 matching lines @@
             case SkXfermode::kPlus_Mode:
                 return 0 == this->getAlpha();
             case SkXfermode::kDst_Mode:
                 return true;
             default:
                 break;
         }
     }
     return false;
 }