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