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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkShadowShader_DEFINED
#define SkShadowShader_DEFINED
#ifdef SK_EXPERIMENTAL_SHADOWING
class SkLights;
class SkShader;
class SK_API SkShadowShader {
public:
/** This shader combines the diffuse color in 'diffuseShader' with the shadows
* determined by the 'povDepthShader' and the shadow maps stored in each of the
* lights in 'lights'
*
* Please note that the shadow shader is required to be in Stage0, otherwise
* the texture coords will be wrong within the shader.
*/
static sk_sp<SkShader> Make(sk_sp<SkShader> povDepthShader,
sk_sp<SkShader> diffuseShader,
sk_sp<SkLights> lights,
int diffuseWidth, int diffuseHeight,
const SkShadowParams& params);
// The shadow shader supports any number of ambient lights, but only
// 4 non-ambient lights (currently just refers to directional lights).
static constexpr int kMaxNonAmbientLights = 4;
SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP()
};
#endif
#endif
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