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/*
* Copyright (C) 2011-2021 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
* 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 "CachedImageClient.h"
#include "CachedResourceHandle.h"
#include "CSSImageGeneratorValue.h"
#include <wtf/Function.h>
namespace WebCore {
namespace Style {
class BuilderState;
}
struct BlendingContext;
class CSSPrimitiveValue;
namespace Style {
class BuilderState;
} // namespace Style
class CSSCrossfadeValue final : public CSSImageGeneratorValue {
public:
static Ref<CSSCrossfadeValue> create(Ref<CSSValue>&& fromValue, Ref<CSSValue>&& toValue, Ref<CSSPrimitiveValue>&& percentageValue, bool prefixed = false);
~CSSCrossfadeValue();
String customCSSText() const;
Image* image(RenderElement&, const FloatSize&);
bool isFixedSize() const { return true; }
FloatSize fixedSize(const RenderElement&);
bool isPrefixed() const { return m_isPrefixed; }
bool isPending() const;
bool knownToBeOpaque(const RenderElement&) const;
void loadSubimages(CachedResourceLoader&, const ResourceLoaderOptions&);
bool traverseSubresources(const Function<bool(const CachedResource&)>& handler) const;
RefPtr<CSSCrossfadeValue> blend(const CSSCrossfadeValue&, const BlendingContext&) const;
bool equals(const CSSCrossfadeValue&) const;
bool equalInputImages(const CSSCrossfadeValue&) const;
Ref<CSSCrossfadeValue> valueWithStylesResolved(Style::BuilderState&);
private:
CSSCrossfadeValue(Ref<CSSValue>&& fromValue, Ref<CSSValue>&& toValue, Ref<CSSPrimitiveValue>&& percentageValue, bool prefixed);
class SubimageObserver final : public CachedImageClient {
public:
SubimageObserver(CSSCrossfadeValue&);
private:
void imageChanged(CachedImage*, const IntRect*) final;
CSSCrossfadeValue& m_owner;
};
void crossfadeChanged();
Ref<CSSValue> m_fromValue;
Ref<CSSValue> m_toValue;
Ref<CSSPrimitiveValue> m_percentageValue;
CachedResourceHandle<CachedImage> m_cachedFromImage;
CachedResourceHandle<CachedImage> m_cachedToImage;
RefPtr<Image> m_generatedImage;
SubimageObserver m_subimageObserver;
bool m_isPrefixed { false };
bool m_subimagesAreReady { false };
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_CSS_VALUE(CSSCrossfadeValue, isCrossfadeValue())
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