Source/WebKit/Shared/WebGPU/WebGPUImageCopyTextureTagged.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
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 * 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
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#pragma once

#if ENABLE(GPU_PROCESS)

#include "WebGPUImageCopyTexture.h"
#include <optional>
#include <pal/graphics/WebGPU/WebGPUPredefinedColorSpace.h>

namespace WebKit::WebGPU {

struct ImageCopyTextureTagged : public ImageCopyTexture {
    PAL::WebGPU::PredefinedColorSpace colorSpace { PAL::WebGPU::PredefinedColorSpace::SRGB };
    bool premultipliedAlpha { false };

    template<class Encoder> void encode(Encoder& encoder) const
    {
        encoder << static_cast<const ImageCopyTexture&>(*this);
        encoder << colorSpace;
        encoder << premultipliedAlpha;
    }

    template<class Decoder> static std::optional<ImageCopyTextureTagged> decode(Decoder& decoder)
    {
        std::optional<ImageCopyTexture> imageCopyTexture;
        decoder >> imageCopyTexture;
        if (!imageCopyTexture)
            return std::nullopt;

        std::optional<PAL::WebGPU::PredefinedColorSpace> colorSpace;
        decoder >> colorSpace;
        if (!colorSpace)
            return std::nullopt;

        std::optional<bool> premultipliedAlpha;
        decoder >> premultipliedAlpha;
        if (!premultipliedAlpha)
            return std::nullopt;

        return { { WTFMove(*imageCopyTexture), WTFMove(*colorSpace), WTFMove(*premultipliedAlpha) } };
    }
};

} // namespace WebKit::WebGPU

#endif // ENABLE(GPU_PROCESS)