Update ComputeBlurredRRectParams to compute all the parameters needed for occluded blurred rrect ni…

include/effects/SkBlurMaskFilter.h

 /*
  * 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.
  */
 
 #ifndef SkBlurMaskFilter_DEFINED
 #define SkBlurMaskFilter_DEFINED
 
@@ skipping 55 matching lines @@
     static SkMaskFilter* CreateEmboss(SkScalar blurSigma, const SkScalar direction[3],
                                       SkScalar ambient, SkScalar specular) {
         return MakeEmboss(blurSigma, direction, ambient, specular).release();
     }
     SK_ATTR_DEPRECATED("use sigma version")
     static SkMaskFilter* CreateEmboss(const SkScalar direction[3],
                                       SkScalar ambient, SkScalar specular,
                                       SkScalar blurRadius);
 #endif
 
-    static bool ComputeBlurredRRectParams(const SkRRect& rrect,
-                                          SkScalar sigma,
+    static const int kMaxDivisions = 6;
+
+    // This method computes all the parameters for drawing a partially occluded nine-patched
+    // blurred rrect mask:
+    //   rrectToDraw - the integerized rrect to draw in the mask
+    //   widthHeight - how large to make the mask (rrectToDraw will be centered in this coord sys)
+    //   rectXs, rectYs - the x & y coordinates of the covering geometry lattice
+    //   texXs, texYs - the texture coordinate at each point in rectXs & rectYs
+    //   numXs, numYs - number of coordinates in the x & y directions
+    //   skipMask - bit mask that contains a 1-bit whenever one of the cells is occluded
+    // It returns true if 'devRRect' is nine-patchable
+    static bool ComputeBlurredRRectParams(const SkRRect& srcRRect, const SkRRect& devRRect,
+                                          const SkRect& occluder,
+                                          SkScalar sigma, SkScalar xformedSigma,
                                           SkRRect* rrectToDraw,
                                           SkISize* widthHeight,
-                                          SkScalar xs[4],
-                                          int* numXs,
-                                          SkScalar ys[4],
-                                          int* numYs);
-
+                                          SkScalar rectXs[kMaxDivisions],
+                                          SkScalar rectYs[kMaxDivisions],
+                                          SkScalar texXs[kMaxDivisions],
+                                          SkScalar texYs[kMaxDivisions],
+                                          int* numXs, int* numYs, uint32_t* skipMask);
 
     SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP()
 
 private:
     SkBlurMaskFilter(); // can't be instantiated
 };
 
 #endif