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/*
* Copyright (C) 2022-2023 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. ``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
* 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
#include "Color.h"
#include "Gradient.h"
#include "Pattern.h"
namespace WebCore {
class SourceBrush {
public:
struct Brush {
struct LogicalGradient {
std::variant<Ref<Gradient>, RenderingResourceIdentifier> gradient;
AffineTransform spaceTransform;
template<typename Encoder> void encode(Encoder&) const;
template<typename Decoder> static std::optional<LogicalGradient> decode(Decoder&);
};
using Variant = std::variant<LogicalGradient, Ref<Pattern>>;
Variant brush;
};
SourceBrush() = default;
WEBCORE_EXPORT SourceBrush(const Color&, std::optional<Brush>&& = std::nullopt);
const Color& color() const { return m_color; }
void setColor(const Color color) { m_color = color; }
const std::optional<Brush>& brush() const { return m_brush; }
WEBCORE_EXPORT Gradient* gradient() const;
WEBCORE_EXPORT Pattern* pattern() const;
WEBCORE_EXPORT const AffineTransform& gradientSpaceTransform() const;
WEBCORE_EXPORT std::optional<RenderingResourceIdentifier> gradientIdentifier() const;
WEBCORE_EXPORT void setGradient(Ref<Gradient>&&, const AffineTransform& spaceTransform = { });
void setPattern(Ref<Pattern>&&);
bool isInlineColor() const { return !m_brush && m_color.tryGetAsSRGBABytes(); }
bool isVisible() const { return m_brush || m_color.isVisible(); }
private:
Color m_color { Color::black };
std::optional<Brush> m_brush;
};
inline bool operator==(const SourceBrush::Brush::LogicalGradient& a, const SourceBrush::Brush::LogicalGradient& b)
{
if (a.spaceTransform != b.spaceTransform)
return false;
return WTF::switchOn(a.gradient,
[&] (const Ref<Gradient>& aGradient) {
if (auto* bGradient = std::get_if<Ref<Gradient>>(&b.gradient))
return aGradient.ptr() == bGradient->ptr();
return false;
},
[&] (RenderingResourceIdentifier aRenderingResourceIdentifier) {
if (auto* bRenderingResourceIdentifier = std::get_if<RenderingResourceIdentifier>(&b.gradient))
return aRenderingResourceIdentifier == *bRenderingResourceIdentifier;
return false;
}
);
}
inline bool operator==(const SourceBrush::Brush& a, const SourceBrush::Brush& b)
{
return WTF::switchOn(a.brush,
[&] (const SourceBrush::Brush::LogicalGradient& aGradient) {
if (auto* bGradient = std::get_if<SourceBrush::Brush::LogicalGradient>(&b.brush))
return aGradient == *bGradient;
return false;
},
[&] (const Ref<Pattern>& aPattern) {
if (auto* bPattern = std::get_if<Ref<Pattern>>(&b.brush))
return aPattern.ptr() == bPattern->ptr();
return false;
}
);
}
inline bool operator==(const SourceBrush& a, const SourceBrush& b)
{
return a.color() == b.color() && a.brush() == b.brush();
}
template<class Encoder>
void SourceBrush::Brush::LogicalGradient::encode(Encoder& encoder) const
{
encoder << spaceTransform;
WTF::switchOn(gradient,
[&] (const Ref<Gradient>& gradient) {
if (gradient->hasValidRenderingResourceIdentifier())
encoder << true << gradient->renderingResourceIdentifier();
else
encoder << false << gradient;
},
[&] (RenderingResourceIdentifier renderingResourceIdentifier) {
encoder << true << renderingResourceIdentifier;
}
);
}
template<class Decoder>
std::optional<SourceBrush::Brush::LogicalGradient> SourceBrush::Brush::LogicalGradient::decode(Decoder& decoder)
{
std::optional<AffineTransform> spaceTransform;
decoder >> spaceTransform;
if (!spaceTransform)
return std::nullopt;
std::optional<bool> hasRenderingResourceIdentifier;
decoder >> hasRenderingResourceIdentifier;
if (!hasRenderingResourceIdentifier)
return std::nullopt;
if (*hasRenderingResourceIdentifier) {
std::optional<RenderingResourceIdentifier> renderingResourceIdentifier;
decoder >> renderingResourceIdentifier;
if (!renderingResourceIdentifier)
return std::nullopt;
return { { { *renderingResourceIdentifier }, *spaceTransform } };
}
std::optional<Ref<Gradient>> gradient;
decoder >> gradient;
if (!gradient)
return std::nullopt;
return { { { WTFMove(*gradient) }, *spaceTransform } };
}
WTF::TextStream& operator<<(WTF::TextStream&, const SourceBrush&);
} // namespace WebCore
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