Cache blur mask for rects which can not break into nine-patch

src/core/SkMaskCache.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkMaskCache_DEFINED
 #define SkMaskCache_DEFINED
 
@@ skipping 21 matching lines @@
 
     /**
      * Add a mask and its pixel-data to the cache.
      */
     static void Add(SkScalar sigma, SkBlurStyle style, SkBlurQuality quality,
                     const SkRRect& rrect, const SkMask& mask, SkCachedData* data,
                     SkResourceCache* localCache = NULL);
     static void Add(SkScalar sigma, SkBlurStyle style, SkBlurQuality quality,
                     const SkRect rects[], int count, const SkMask& mask, SkCachedData* data,
                     SkResourceCache* localCache = NULL);
+
+    /**
+     * On success, set mask with cached value, allocate memory for mask->fImage,
+     * copy pixels from SkCachedData in the cache to mask->fImage, then return true.
+     *
+     * On failure, return false, no memory allocated for mask->fImage.
+     */
+    static bool FindAndCopy(SkScalar sigma, SkBlurStyle style, SkBlurQuality quality,
+                            const SkRRect& rrect, SkMask* mask);
+    static bool FindAndCopy(SkScalar sigma, SkBlurStyle style, SkBlurQuality quality,
+                            const SkRect rects[], int count, SkMask* mask);
+
+    /**
+     * Create a new SkCachedData, copy pixels from mask.fImage to it, then add it into cache.
+     */
+    static void AddAndCopy(SkScalar sigma, SkBlurStyle style, SkBlurQuality quality,
+                           const SkRRect& rrect, const SkMask& mask);
+    static void AddAndCopy(SkScalar sigma, SkBlurStyle style, SkBlurQuality quality,
+                           const SkRect rects[], int count, const SkMask& mask);
 };
 
 #endif