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/*
* Copyright (C) 2022 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 THE COPYRIGHT HOLDER "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 THE COPYRIGHT HOLDER 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.
*/
#include "config.h"
#include "StyleCrossfadeImage.h"
#include "AnimationUtilities.h"
#include "CSSCrossfadeValue.h"
#include "CSSValuePool.h"
#include "CachedImage.h"
#include "CachedResourceLoader.h"
#include "CrossfadeGeneratedImage.h"
#include "RenderElement.h"
#include <wtf/PointerComparison.h>
namespace WebCore {
StyleCrossfadeImage::StyleCrossfadeImage(RefPtr<StyleImage>&& from, RefPtr<StyleImage>&& to, double percentage, bool isPrefixed)
: StyleGeneratedImage { Type::CrossfadeImage, StyleCrossfadeImage::isFixedSize }
, m_from { WTFMove(from) }
, m_to { WTFMove(to) }
, m_percentage { percentage }
, m_isPrefixed { isPrefixed }
, m_inputImagesAreReady { false }
{
}
StyleCrossfadeImage::~StyleCrossfadeImage()
{
if (m_cachedFromImage)
m_cachedFromImage->removeClient(*this);
if (m_cachedToImage)
m_cachedToImage->removeClient(*this);
}
bool StyleCrossfadeImage::operator==(const StyleImage& other) const
{
auto* otherCrossfadeImage = dynamicDowncast<StyleCrossfadeImage>(other);
return otherCrossfadeImage && equals(*otherCrossfadeImage);
}
bool StyleCrossfadeImage::equals(const StyleCrossfadeImage& other) const
{
return equalInputImages(other) && m_percentage == other.m_percentage;
}
bool StyleCrossfadeImage::equalInputImages(const StyleCrossfadeImage& other) const
{
return arePointingToEqualData(m_from, other.m_from) && arePointingToEqualData(m_to, other.m_to);
}
RefPtr<StyleCrossfadeImage> StyleCrossfadeImage::blend(const StyleCrossfadeImage& from, const BlendingContext& context) const
{
ASSERT(equalInputImages(from));
if (!m_cachedToImage || !m_cachedFromImage)
return nullptr;
auto newPercentage = WebCore::blend(from.m_percentage, m_percentage, context);
return StyleCrossfadeImage::create(m_from, m_to, newPercentage, from.m_isPrefixed && m_isPrefixed);
}
Ref<CSSValue> StyleCrossfadeImage::computedStyleValue(const RenderStyle& style) const
{
auto fromComputedValue = m_from ? m_from->computedStyleValue(style) : static_reference_cast<CSSValue>(CSSPrimitiveValue::create(CSSValueNone));
auto toComputedValue = m_to ? m_to->computedStyleValue(style) : static_reference_cast<CSSValue>(CSSPrimitiveValue::create(CSSValueNone));
return CSSCrossfadeValue::create(WTFMove(fromComputedValue), WTFMove(toComputedValue), CSSPrimitiveValue::create(m_percentage), m_isPrefixed);
}
bool StyleCrossfadeImage::isPending() const
{
if (m_from && m_from->isPending())
return true;
if (m_to && m_to->isPending())
return true;
return false;
}
void StyleCrossfadeImage::load(CachedResourceLoader& loader, const ResourceLoaderOptions& options)
{
auto oldCachedFromImage = m_cachedFromImage;
auto oldCachedToImage = m_cachedToImage;
if (m_from) {
if (m_from->isPending())
m_from->load(loader, options);
m_cachedFromImage = m_from->cachedImage();
} else
m_cachedFromImage = nullptr;
if (m_to) {
if (m_to->isPending())
m_to->load(loader, options);
m_cachedToImage = m_to->cachedImage();
} else
m_cachedToImage = nullptr;
if (m_cachedFromImage != oldCachedFromImage) {
if (oldCachedFromImage)
oldCachedFromImage->removeClient(*this);
if (m_cachedFromImage)
m_cachedFromImage->addClient(*this);
}
if (m_cachedToImage != oldCachedToImage) {
if (oldCachedToImage)
oldCachedToImage->removeClient(*this);
if (m_cachedToImage)
m_cachedToImage->addClient(*this);
}
m_inputImagesAreReady = true;
}
RefPtr<Image> StyleCrossfadeImage::image(const RenderElement* renderer, const FloatSize& size, bool isForFirstLine) const
{
if (!renderer)
return &Image::nullImage();
if (size.isEmpty())
return nullptr;
if (!m_from || !m_to)
return &Image::nullImage();
auto fromImage = m_from->image(renderer, size, isForFirstLine);
auto toImage = m_to->image(renderer, size, isForFirstLine);
if (!fromImage || !toImage)
return &Image::nullImage();
return CrossfadeGeneratedImage::create(*fromImage, *toImage, m_percentage, fixedSize(*renderer), size);
}
bool StyleCrossfadeImage::knownToBeOpaque(const RenderElement& renderer) const
{
if (m_from && !m_from->knownToBeOpaque(renderer))
return false;
if (m_to && !m_to->knownToBeOpaque(renderer))
return false;
return true;
}
FloatSize StyleCrossfadeImage::fixedSize(const RenderElement& renderer) const
{
if (!m_from || !m_to)
return { };
auto fromImageSize = m_from->imageSize(&renderer, 1);
auto toImageSize = m_to->imageSize(&renderer, 1);
// Rounding issues can cause transitions between images of equal size to return
// a different fixed size; avoid performing the interpolation if the images are the same size.
if (fromImageSize == toImageSize)
return fromImageSize;
float percentage = m_percentage;
float inversePercentage = 1 - percentage;
return fromImageSize * inversePercentage + toImageSize * percentage;
}
void StyleCrossfadeImage::imageChanged(CachedImage*, const IntRect*)
{
if (!m_inputImagesAreReady)
return;
for (auto entry : clients()) {
auto& client = entry.key;
client.imageChanged(static_cast<WrappedImagePtr>(this));
}
}
} // namespace WebCore
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