Made shadows blurry (thru implementing variance mapping)

src/utils/SkShadowPaintFilterCanvas.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkShadowPaintFilterCanvas_DEFINED
 #define SkShadowPaintFilterCanvas_DEFINED
 
@@ skipping 17 matching lines @@
 public:
 
     SkShadowPaintFilterCanvas(SkCanvas *canvas);
 
     // TODO use a shader instead
     bool onFilter(SkTCopyOnFirstWrite<SkPaint>* paint, Type type) const override;
 
     static SkISize ComputeDepthMapSize(const SkLights::Light& light, int maxDepth,
                                        int width, int height);
 
+    void setShadowParams(const SkShadowParams &params);
 protected:
     void onDrawPicture(const SkPicture *picture, const SkMatrix *matrix,
                        const SkPaint *paint) override;
 
     void updateMatrix();
 
     void onDrawPaint(const SkPaint &paint) override;
 
     void onDrawPoints(PointMode mode, size_t count, const SkPoint pts[],
                       const SkPaint &paint) override;
@@ skipping 52 matching lines @@
     void onDrawTextOnPath(const void *text, size_t byteLength, const SkPath &path,
                           const SkMatrix *matrix, const SkPaint &paint) override;
 
     void onDrawTextRSXform(const void *text, size_t byteLength,
                            const SkRSXform xform[], const SkRect *cull,
                            const SkPaint &paint) override;
 
     void onDrawTextBlob(const SkTextBlob *blob, SkScalar x,
                         SkScalar y, const SkPaint &paint) override;
 private:
+    SkShadowParams fShadowParams;
     typedef SkPaintFilterCanvas INHERITED;
 };
 
 
 #endif
 #endif