/*
 * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
 * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
 * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
 * Copyright (C) 2021 Apple Inc.  All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#pragma once

#include "FELighting.h"

namespace WebCore {

class LightSource;

class FEDiffuseLighting : public FELighting {
public:
    static Ref<FEDiffuseLighting> create(const Color& lightingColor, float surfaceScale, float diffuseConstant, float kernelUnitLengthX, float kernelUnitLengthY, Ref<LightSource>&&);

    float diffuseConstant() const { return m_diffuseConstant; }
    bool setDiffuseConstant(float);

    WTF::TextStream& externalRepresentation(WTF::TextStream&, FilterRepresentation) const override;

    template<class Decoder> static std::optional<Ref<FEDiffuseLighting>> decode(Decoder&);

private:
    FEDiffuseLighting(const Color& lightingColor, float surfaceScale, float diffuseConstant, float kernelUnitLengthX, float kernelUnitLengthY, Ref<LightSource>&&);
};

template<class Decoder>
std::optional<Ref<FEDiffuseLighting>> FEDiffuseLighting::decode(Decoder& decoder)
{
    return FELighting::decode<Decoder, FEDiffuseLighting>(decoder);
}

} // namespace WebCore

SPECIALIZE_TYPE_TRAITS_FILTER_EFFECT(FEDiffuseLighting)
