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/*
Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
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.
*/
#ifndef CachedImage_h
#define CachedImage_h
#include "CachedResource.h"
#include "ImageObserver.h"
#include "IntRect.h"
#include "Timer.h"
#include <wtf/Vector.h>
namespace WebCore {
class CachedResourceLoader;
class MemoryCache;
class CachedImage : public CachedResource, public ImageObserver {
friend class MemoryCache;
public:
CachedImage(const String& url);
CachedImage(Image*);
virtual ~CachedImage();
virtual void load(CachedResourceLoader* cachedResourceLoader);
Image* image() const; // Returns the nullImage() if the image is not available yet.
bool hasImage() const { return m_image.get(); }
bool canRender(float multiplier) const { return !errorOccurred() && !imageSize(multiplier).isEmpty(); }
// These are only used for SVGImage right now
void setImageContainerSize(const IntSize&);
bool usesImageContainerSize() const;
bool imageHasRelativeWidth() const;
bool imageHasRelativeHeight() const;
// Both of these methods take a zoom multiplier that can be used to increase the natural size of the image by the
// zoom.
IntSize imageSize(float multiplier) const; // returns the size of the complete image.
IntRect imageRect(float multiplier) const; // The size of the currently decoded portion of the image.
virtual void didAddClient(CachedResourceClient*);
virtual void allClientsRemoved();
virtual void destroyDecodedData();
virtual void data(PassRefPtr<SharedBuffer> data, bool allDataReceived);
virtual void error(CachedResource::Status);
// For compatibility, images keep loading even if there are HTTP errors.
virtual bool shouldIgnoreHTTPStatusCodeErrors() const { return true; }
virtual bool isImage() const { return true; }
void clear();
bool stillNeedsLoad() const { return (!errorOccurred() && status() == Unknown && !isLoading()) || (m_autoLoadWasPreventedBySettings && !inCache()); }
void load();
// ImageObserver
virtual void decodedSizeChanged(const Image* image, int delta);
virtual void didDraw(const Image*);
virtual bool shouldPauseAnimation(const Image*);
virtual void animationAdvanced(const Image*);
virtual void changedInRect(const Image*, const IntRect&);
void setAutoLoadWasPreventedBySettings(bool prevented) { m_autoLoadWasPreventedBySettings = prevented; }
private:
void createImage();
size_t maximumDecodedImageSize();
// If not null, changeRect is the changed part of the image.
void notifyObservers(const IntRect* changeRect = 0);
void decodedDataDeletionTimerFired(Timer<CachedImage>*);
virtual PurgePriority purgePriority() const { return PurgeFirst; }
void checkShouldPaintBrokenImage();
RefPtr<Image> m_image;
Timer<CachedImage> m_decodedDataDeletionTimer;
bool m_shouldPaintBrokenImage;
bool m_autoLoadWasPreventedBySettings;
};
}
#endif
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