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/*
* Copyright 2017 Google Inc.
*
* 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
#include "SkColor.h"
#include "SkPoint.h"
#include "SkRefCnt.h"
class SkMatrix;
class SkPath;
struct SkPoint3;
class SkVertices;
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);
}
#endif
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