Source/WebKit/Shared/WebGPU/WebGPUSamplerDescriptor.h

/*
 * Copyright (C) 2021 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#if ENABLE(GPU_PROCESS)

#include "WebGPUObjectDescriptorBase.h"
#include <cstdint>
#include <optional>
#include <pal/graphics/WebGPU/WebGPUAddressMode.h>
#include <pal/graphics/WebGPU/WebGPUCompareFunction.h>
#include <pal/graphics/WebGPU/WebGPUFilterMode.h>

namespace WebKit::WebGPU {

struct SamplerDescriptor : public ObjectDescriptorBase {
    PAL::WebGPU::AddressMode addressModeU { PAL::WebGPU::AddressMode::ClampToEdge };
    PAL::WebGPU::AddressMode addressModeV { PAL::WebGPU::AddressMode::ClampToEdge };
    PAL::WebGPU::AddressMode addressModeW { PAL::WebGPU::AddressMode::ClampToEdge };
    PAL::WebGPU::FilterMode magFilter { PAL::WebGPU::FilterMode::Nearest };
    PAL::WebGPU::FilterMode minFilter { PAL::WebGPU::FilterMode::Nearest };
    PAL::WebGPU::FilterMode mipmapFilter { PAL::WebGPU::FilterMode::Nearest };
    float lodMinClamp { 0 };
    float lodMaxClamp { 32 };
    std::optional<PAL::WebGPU::CompareFunction> compare;
    uint16_t maxAnisotropy { 1 };

    template<class Encoder> void encode(Encoder& encoder) const
    {
        encoder << static_cast<const ObjectDescriptorBase&>(*this);
        encoder << addressModeU;
        encoder << addressModeV;
        encoder << addressModeW;
        encoder << magFilter;
        encoder << minFilter;
        encoder << mipmapFilter;
        encoder << lodMinClamp;
        encoder << lodMaxClamp;
        encoder << compare;
        encoder << maxAnisotropy;
    }

    template<class Decoder> static std::optional<SamplerDescriptor> decode(Decoder& decoder)
    {
        std::optional<ObjectDescriptorBase> objectDescriptorBase;
        decoder >> objectDescriptorBase;
        if (!objectDescriptorBase)
            return std::nullopt;

        std::optional<PAL::WebGPU::AddressMode> addressModeU;
        decoder >> addressModeU;
        if (!addressModeU)
            return std::nullopt;

        std::optional<PAL::WebGPU::AddressMode> addressModeV;
        decoder >> addressModeV;
        if (!addressModeV)
            return std::nullopt;

        std::optional<PAL::WebGPU::AddressMode> addressModeW;
        decoder >> addressModeW;
        if (!addressModeW)
            return std::nullopt;

        std::optional<PAL::WebGPU::FilterMode> magFilter;
        decoder >> magFilter;
        if (!magFilter)
            return std::nullopt;

        std::optional<PAL::WebGPU::FilterMode> minFilter;
        decoder >> minFilter;
        if (!minFilter)
            return std::nullopt;

        std::optional<PAL::WebGPU::FilterMode> mipmapFilter;
        decoder >> mipmapFilter;
        if (!mipmapFilter)
            return std::nullopt;

        std::optional<float> lodMinClamp;
        decoder >> lodMinClamp;
        if (!lodMinClamp)
            return std::nullopt;

        std::optional<float> lodMaxClamp;
        decoder >> lodMaxClamp;
        if (!lodMaxClamp)
            return std::nullopt;

        std::optional<std::optional<PAL::WebGPU::CompareFunction>> compare;
        decoder >> compare;
        if (!compare)
            return std::nullopt;

        std::optional<uint16_t> maxAnisotropy;
        decoder >> maxAnisotropy;
        if (!maxAnisotropy)
            return std::nullopt;

        return { { WTFMove(*objectDescriptorBase), WTFMove(*addressModeU), WTFMove(*addressModeV), WTFMove(*addressModeW), WTFMove(*magFilter), WTFMove(*minFilter), WTFMove(*mipmapFilter), WTFMove(*lodMinClamp), WTFMove(*lodMaxClamp), WTFMove(*compare), WTFMove(*maxAnisotropy) } };
    }
};

} // namespace WebKit::WebGPU

#endif // ENABLE(GPU_PROCESS)