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/*
* Copyright (C) 2008 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 "core/css/CSSValue.h"
#include "platform/geometry/IntSizeHash.h"
#include "wtf/HashCountedSet.h"
#include "wtf/RefPtr.h"
namespace WebCore {
class ResourceFetcher;
class Image;
class RenderObject;
class StyleResolver;
struct SizeAndCount {
SizeAndCount(IntSize newSize = IntSize(), int newCount = 0)
: size(newSize)
, count(newCount)
{
}
IntSize size;
int count;
};
typedef HashMap<const RenderObject*, SizeAndCount> RenderObjectSizeCountMap;
class CSSImageGeneratorValue : public CSSValue {
public:
~CSSImageGeneratorValue();
void addClient(RenderObject*, const IntSize&);
void removeClient(RenderObject*);
PassRefPtr<Image> image(RenderObject*, const IntSize&);
bool isFixedSize() const;
IntSize fixedSize(const RenderObject*);
bool isPending() const;
bool knownToBeOpaque(const RenderObject*) const;
void loadSubimages(ResourceFetcher*);
void traceAfterDispatch(Visitor* visitor) { CSSValue::traceAfterDispatch(visitor); }
protected:
explicit CSSImageGeneratorValue(ClassType);
Image* getImage(RenderObject*, const IntSize&);
void putImage(const IntSize&, PassRefPtr<Image>);
const RenderObjectSizeCountMap& clients() const { return m_clients; }
HashCountedSet<IntSize> m_sizes; // A count of how many times a given image size is in use.
RenderObjectSizeCountMap m_clients; // A map from RenderObjects (with entry count) to image sizes.
HashMap<IntSize, RefPtr<Image> > m_images; // A cache of Image objects by image size.
#if ENABLE(OILPAN)
// FIXME: Oilpan: when/if we can make the renderer point directly to the CSSImageGenerator value using
// a member we don't need to have this hack where we keep a persistent to the instance as long as
// there are clients in the RenderObjectSizeCountMap.
GC_PLUGIN_IGNORE("366546")
OwnPtr<Persistent<CSSImageGeneratorValue> > m_keepAlive;
#endif
};
DEFINE_CSS_VALUE_TYPE_CASTS(CSSImageGeneratorValue, isImageGeneratorValue());
} // namespace WebCore
#endif // CSSImageGeneratorValue_h
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