1/*
2 * Copyright 2016 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#ifndef SkRRectsGaussianEdgeMaskFilter_DEFINED
9#define SkRRectsGaussianEdgeMaskFilter_DEFINED
10
11#include "SkMaskFilter.h"
12
13class SkRRect;
14
15class SK_API SkRRectsGaussianEdgeMaskFilter {
16public:
17    /** Returns a mask filter that applies a Gaussian blur depending on distance to the edge
18     *  of the intersection of two round rects.
19     *  Currently this is only useable with round rects that have the same radii at
20     *  all the corners and for which the x & y radii are equal.
21     *
22     *  In order to minimize fill the coverage geometry that should be drawn should be no larger
23     *  than the intersection of the bounding boxes of the two round rects. Ambitious users can
24     *  omit the center area of the coverage geometry if it is known to be occluded.
25     */
26    static sk_sp<SkMaskFilter> Make(const SkRRect& first,
27                                    const SkRRect& second,
28                                    SkScalar radius);
29
30    SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP()
31
32private:
33    SkRRectsGaussianEdgeMaskFilter(); // can't be instantiated
34};
35
36#endif
37