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/*
* Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2014 Apple Inc. All rights reserved.
* Copyright (C) 2025 Samuel Weinig <sam@webkit.org>
*
* 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.
*
*/
#include "config.h"
#include "StyleBackgroundLayer.h"
#include "CachedImage.h"
#include "StylePrimitiveKeyword+Logging.h"
#include "StylePrimitiveNumericTypes+Logging.h"
#include <wtf/text/TextStream.h>
namespace WebCore {
namespace Style {
BackgroundLayer::BackgroundLayer()
: m_image(BackgroundLayer::initialImage())
, m_positionX(BackgroundLayer::initialPositionX())
, m_positionY(BackgroundLayer::initialPositionY())
, m_size(BackgroundLayer::initialSize())
, m_repeat(BackgroundLayer::initialRepeat())
, m_attachment(static_cast<unsigned>(BackgroundLayer::initialAttachment()))
, m_clip(static_cast<unsigned>(BackgroundLayer::initialClip()))
, m_origin(static_cast<unsigned>(BackgroundLayer::initialOrigin()))
, m_blendMode(static_cast<unsigned>(BackgroundLayer::initialBlendMode()))
, m_clipMax(static_cast<unsigned>(BackgroundLayer::initialClip()))
{
}
BackgroundLayer::BackgroundLayer(ImageOrNone&& image)
: BackgroundLayer { }
{
setImage(WTFMove(image));
}
BackgroundLayer::BackgroundLayer(CSS::Keyword::None keyword)
: BackgroundLayer { ImageOrNone { keyword } }
{
}
BackgroundLayer::BackgroundLayer(RefPtr<StyleImage>&& image)
: BackgroundLayer { ImageOrNone { WTFMove(image) } }
{
}
bool BackgroundLayer::operator==(const BackgroundLayer& other) const
{
// NOTE: Default operator== is not used due to exclusion of m_clipMax.
return allOfCoordinatedValueListProperties<BackgroundLayer>([this, &other]<auto propertyID>() {
using PropertyAccessor = CoordinatedValueListPropertyConstAccessor<propertyID>;
return PropertyAccessor { *this } == PropertyAccessor { other };
});
}
bool BackgroundLayer::hasOpaqueImage(const RenderElement& renderer) const
{
RefPtr image = m_image.tryStyleImage();
if (!image)
return false;
if (composite() == CompositeOperator::Clear
|| composite() == CompositeOperator::Copy)
return true;
return blendMode() == BlendMode::Normal
&& composite() == CompositeOperator::SourceOver
&& image->knownToBeOpaque(renderer);
}
// MARK: - Blending
auto Blending<BackgroundLayer>::canBlend(const BackgroundLayer& a, const BackgroundLayer& b) -> bool
{
return a.size().hasSameType(b.size());
}
// MARK: - Logging
TextStream& operator<<(TextStream& ts, const BackgroundLayer& layer)
{
TextStream::GroupScope scope(ts);
ts << "background-layer"_s;
ts.dumpProperty("image"_s, layer.image());
ts.dumpProperty("position"_s, layer.position());
ts.dumpProperty("size"_s, layer.size());
ts.dumpProperty("repeat"_s, layer.repeat());
ts.dumpProperty("clip"_s, layer.clip());
ts.dumpProperty("origin"_s, layer.origin());
ts.dumpProperty("blend-mode"_s, layer.blendMode());
return ts;
}
} // namespace Style
} // namespace WebCore
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