1/*
2 * Copyright 2017 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 SkAmbientShadowMaskFilter_DEFINED
9#define SkAmbientShadowMaskFilter_DEFINED
10
11#include "SkMaskFilter.h"
12#include "SkShadowFlags.h"
13
14/*
15 * This filter implements a shadow representing ambient occlusion for an occluding object.
16 */
17class SK_API SkAmbientShadowMaskFilter {
18public:
19    /** Create a shadow maskfilter.
20     *  @param occluderHeight Height of occluding object off of ground plane.
21     *  @param ambientAlpha   Base opacity of the ambient occlusion shadow.
22     *  @param flags          Flags to use - defaults to none
23     *  @return The new shadow maskfilter
24     */
25    static sk_sp<SkMaskFilter> Make(SkScalar occluderHeight, SkScalar ambientAlpha,
26                                    uint32_t flags = SkShadowFlags::kNone_ShadowFlag);
27
28    SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP()
29
30private:
31    SkAmbientShadowMaskFilter(); // can't be instantiated
32};
33#endif
34