/*
* Copyright 2017 Google LLC
*
* Use of this source code is governed by a BSD - style license that can be
* found in the LICENSE file .
*/
#ifndef SkShadowTessellator_DEFINED
#define SkShadowTessellator_DEFINED
#if !defined (SK_ENABLE_OPTIMIZE_SIZE)
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include <functional>
class SkMatrix;
class SkPath;
class SkVertices;
struct SkPoint3;
namespace SkShadowTessellator {
typedef std::function<SkScalar(SkScalar, SkScalar)> HeightFunc;
/**
* This function generates an ambient shadow mesh for a path by walking the path , outsetting by
* the radius , and setting inner and outer colors to umbraColor and penumbraColor , respectively .
* If transparent is true , then the center of the ambient shadow will be filled in .
*/
sk_sp<SkVertices> MakeAmbient(const SkPath& path, const SkMatrix& ctm,
const SkPoint3& zPlane, bool transparent);
/**
* This function generates a spot shadow mesh for a path by walking the transformed path ,
* further transforming by the scale and translation , and outsetting and insetting by a radius .
* The center will be clipped against the original path unless transparent is true .
*/
sk_sp<SkVertices> MakeSpot(const SkPath& path, const SkMatrix& ctm, const SkPoint3& zPlane,
const SkPoint3& lightPos, SkScalar lightRadius, bool transparent,
bool directional);
} // namespace SkShadowTessellator
#endif // SK_ENABLE_OPTIMIZE_SIZE
#endif
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