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/*
* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
* (C) 2000 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2003, 2005-2008, 2016 Apple Inc. All rights reserved.
* Copyright (C) 2020 Noam Rosenthal (noam@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 "StyleImageSet.h"
#include "CSSImageSetOptionValue.h"
#include "CSSImageSetValue.h"
#include "CSSPrimitiveValue.h"
#include "Document.h"
#include "MIMETypeRegistry.h"
#include "Page.h"
#include "StyleInvalidImage.h"
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
WTF_MAKE_TZONE_ALLOCATED_IMPL(StyleImageSet);
Ref<StyleImageSet> StyleImageSet::create(Vector<ImageWithScale>&& images, Vector<size_t>&& sortedIndices)
{
ASSERT(images.size() == sortedIndices.size());
return adoptRef(*new StyleImageSet(WTFMove(images), WTFMove(sortedIndices)));
}
StyleImageSet::StyleImageSet(Vector<ImageWithScale>&& images, Vector<size_t>&& sortedIndices)
: StyleMultiImage { Type::ImageSet }
, m_images { WTFMove(images) }
, m_sortedIndices { WTFMove(sortedIndices) }
{
}
StyleImageSet::~StyleImageSet() = default;
bool StyleImageSet::operator==(const StyleImage& other) const
{
auto* otherImageSet = dynamicDowncast<StyleImageSet>(other);
return otherImageSet && equals(*otherImageSet);
}
bool StyleImageSet::equals(const StyleImageSet& other) const
{
return m_images == other.m_images && StyleMultiImage::equals(other);
}
Ref<CSSValue> StyleImageSet::computedStyleValue(const RenderStyle& style) const
{
auto builder = WTF::map<CSSValueListBuilderInlineCapacity>(m_images, [&](auto& image) -> Ref<CSSValue> {
return CSSImageSetOptionValue::create(image.image->computedStyleValue(style), CSSPrimitiveValue::create(image.scaleFactor, CSSUnitType::CSS_DPPX), image.mimeType);
});
return CSSImageSetValue::create(WTFMove(builder));
}
ImageWithScale StyleImageSet::selectBestFitImage(const Document& document)
{
updateDeviceScaleFactor(document);
if (!m_accessedBestFitImage) {
m_accessedBestFitImage = true;
m_bestFitImage = bestImageForScaleFactor();
}
return m_bestFitImage;
}
ImageWithScale StyleImageSet::bestImageForScaleFactor()
{
ImageWithScale result;
for (auto index : m_sortedIndices) {
const auto& image = m_images[index];
if (!image.mimeType.isNull() && !MIMETypeRegistry::isSupportedImageMIMEType(image.mimeType))
continue;
if (!result.image->isInvalidImage() && result.scaleFactor == image.scaleFactor)
continue;
if (image.scaleFactor >= m_deviceScaleFactor)
return image;
result = image;
}
ASSERT(result.scaleFactor >= 0);
if (result.image->isInvalidImage() || !result.scaleFactor)
result = ImageWithScale { StyleInvalidImage::create(), 1, String() };
return result;
}
void StyleImageSet::updateDeviceScaleFactor(const Document& document)
{
// FIXME: In the future, we want to take much more than deviceScaleFactor into acount here.
// All forms of scale should be included: Page::pageScaleFactor(), Frame::pageZoomFactor(),
// and any CSS transforms. https://bugs.webkit.org/show_bug.cgi?id=81698
float deviceScaleFactor = document.page() ? document.page()->deviceScaleFactor() : 1;
if (deviceScaleFactor == m_deviceScaleFactor)
return;
m_deviceScaleFactor = deviceScaleFactor;
m_accessedBestFitImage = false;
}
} // namespace WebCore
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