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/*
* Copyright (C) 2008, 2011, 2012, 2013 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 COMPUTER, 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 COMPUTER, 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.
*/
#ifndef CSSImageGeneratorValue_h
#define CSSImageGeneratorValue_h
#include "CSSValue.h"
#include "IntSizeHash.h"
#include "Timer.h"
#include <wtf/HashCountedSet.h>
namespace WebCore {
class CachedImage;
class CachedResourceLoader;
class GeneratedImage;
class Image;
class RenderElement;
class StyleResolver;
class CSSImageGeneratorValue : public CSSValue {
public:
~CSSImageGeneratorValue();
void addClient(RenderElement*);
void removeClient(RenderElement*);
PassRefPtr<Image> image(RenderElement*, const IntSize&);
bool isFixedSize() const;
IntSize fixedSize(const RenderElement*);
bool isPending() const;
bool knownToBeOpaque(const RenderElement*) const;
void loadSubimages(CachedResourceLoader*);
protected:
CSSImageGeneratorValue(ClassType);
GeneratedImage* cachedImageForSize(IntSize);
void saveCachedImageForSize(IntSize, PassRefPtr<GeneratedImage>);
const HashCountedSet<RenderElement*>& clients() const { return m_clients; }
// Helper functions for Crossfade and Filter.
static CachedImage* cachedImageForCSSValue(CSSValue*, CachedResourceLoader*);
static bool subimageIsPending(CSSValue*);
private:
class CachedGeneratedImage {
public:
CachedGeneratedImage(CSSImageGeneratorValue&, IntSize, PassRefPtr<GeneratedImage>);
GeneratedImage* image() { return m_image.get(); }
void puntEvictionTimer() { m_evictionTimer.restart(); }
private:
void evictionTimerFired(DeferrableOneShotTimer<CachedGeneratedImage>&);
CSSImageGeneratorValue& m_owner;
IntSize m_size;
RefPtr<GeneratedImage> m_image;
DeferrableOneShotTimer<CachedGeneratedImage> m_evictionTimer;
};
friend class CachedGeneratedImage;
void evictCachedGeneratedImage(IntSize);
HashCountedSet<RenderElement*> m_clients;
HashMap<IntSize, std::unique_ptr<CachedGeneratedImage>> m_images;
};
CSS_VALUE_TYPE_CASTS(CSSImageGeneratorValue, isImageGeneratorValue())
} // namespace WebCore
#endif // CSSImageGeneratorValue_h
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