Source/WebCore/platform/graphics/DestinationColorSpace.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

#include "PlatformColorSpace.h"
#include <optional>
#include <wtf/Forward.h>

namespace WebCore {

class DestinationColorSpace {
public:
    WEBCORE_EXPORT static const DestinationColorSpace& SRGB();
#if ENABLE(DESTINATION_COLOR_SPACE_LINEAR_SRGB)
    WEBCORE_EXPORT static const DestinationColorSpace& LinearSRGB();
#endif
#if ENABLE(DESTINATION_COLOR_SPACE_DISPLAY_P3)
    WEBCORE_EXPORT static const DestinationColorSpace& DisplayP3();
#endif

    WEBCORE_EXPORT explicit DestinationColorSpace(PlatformColorSpace);
    PlatformColorSpaceValue platformColorSpace() const { return m_platformColorSpace.get(); }

    WEBCORE_EXPORT std::optional<DestinationColorSpace> asRGB() const;

    template<class Encoder> void encode(Encoder&) const;
    template<class Decoder> static std::optional<DestinationColorSpace> decode(Decoder&);

private:
    PlatformColorSpace m_platformColorSpace;
};

WEBCORE_EXPORT bool operator==(const DestinationColorSpace&, const DestinationColorSpace&);
WEBCORE_EXPORT bool operator!=(const DestinationColorSpace&, const DestinationColorSpace&);

WEBCORE_EXPORT TextStream& operator<<(TextStream&, const DestinationColorSpace&);

template<class Encoder> void DestinationColorSpace::encode(Encoder& encoder) const
{
    encoder << m_platformColorSpace;
}

template<class Decoder> std::optional<DestinationColorSpace> DestinationColorSpace::decode(Decoder& decoder)
{
    std::optional<PlatformColorSpace> platformColorSpace;
    decoder >> platformColorSpace;
    if (!platformColorSpace)
        return std::nullopt;

    return DestinationColorSpace { WTFMove(*platformColorSpace) };
}

}