1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131
|
/*
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 "IntSizeHash.h"
#include "LayoutSize.h"
#include "SVGImageCache.h"
#include <wtf/HashMap.h>
#include <wtf/Vector.h>
namespace WebCore {
class CachedImageClient;
class CachedResourceLoader;
class FloatSize;
class MemoryCache;
class RenderObject;
struct Length;
class CachedImage FINAL : public CachedResource, public ImageObserver {
friend class MemoryCache;
public:
CachedImage(const ResourceRequest&);
CachedImage(Image*);
virtual ~CachedImage();
Image* image(); // Returns the nullImage() if the image is not available yet.
Image* imageForRenderer(const RenderObject*); // Returns the nullImage() if the image is not available yet.
bool hasImage() const { return m_image.get(); }
bool currentFrameKnownToBeOpaque(const RenderObject*); // Side effect: ensures decoded image is in cache, therefore should only be called when about to draw the image.
std::pair<Image*, float> brokenImage(float deviceScaleFactor) const; // Returns an image and the image's resolution scale factor.
bool willPaintBrokenImage() const;
bool canRender(const RenderObject* renderer, float multiplier) { return !errorOccurred() && !imageSizeForRenderer(renderer, multiplier).isEmpty(); }
void setContainerSizeForRenderer(const CachedImageClient*, const IntSize&, float);
bool usesImageContainerSize() const;
bool imageHasRelativeWidth() const;
bool imageHasRelativeHeight() const;
virtual void addDataBuffer(ResourceBuffer*) OVERRIDE;
virtual void finishLoading(ResourceBuffer*) OVERRIDE;
// This method takes a zoom multiplier that can be used to increase the natural size of the image by the zoom.
LayoutSize imageSizeForRenderer(const RenderObject*, float multiplier); // returns the size of the complete image.
void computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio);
static void resumeAnimatingImagesForLoader(CachedResourceLoader*);
private:
virtual void load(CachedResourceLoader*, const ResourceLoaderOptions&) OVERRIDE;
void clear();
void createImage();
void clearImage();
bool canBeDrawn() const;
// If not null, changeRect is the changed part of the image.
void notifyObservers(const IntRect* changeRect = 0);
virtual PurgePriority purgePriority() const OVERRIDE { return PurgeFirst; }
void checkShouldPaintBrokenImage();
virtual void switchClientsToRevalidatedResource() OVERRIDE;
virtual bool mayTryReplaceEncodedData() const OVERRIDE { return true; }
virtual void didAddClient(CachedResourceClient*) OVERRIDE;
virtual void didRemoveClient(CachedResourceClient*) OVERRIDE;
virtual void allClientsRemoved() OVERRIDE;
virtual void destroyDecodedData() OVERRIDE;
virtual void addData(const char* data, unsigned length) OVERRIDE;
virtual void error(CachedResource::Status) OVERRIDE;
virtual void responseReceived(const ResourceResponse&) OVERRIDE;
// For compatibility, images keep loading even if there are HTTP errors.
virtual bool shouldIgnoreHTTPStatusCodeErrors() const OVERRIDE { return true; }
virtual bool isImage() const OVERRIDE { return true; }
virtual bool stillNeedsLoad() const OVERRIDE { return !errorOccurred() && status() == Unknown && !isLoading(); }
// ImageObserver
virtual void decodedSizeChanged(const Image*, int delta) OVERRIDE;
virtual void didDraw(const Image*) OVERRIDE;
virtual bool shouldPauseAnimation(const Image*) OVERRIDE;
virtual void animationAdvanced(const Image*) OVERRIDE;
virtual void changedInRect(const Image*, const IntRect&) OVERRIDE;
void addIncrementalDataBuffer(ResourceBuffer*);
typedef pair<IntSize, float> SizeAndZoom;
typedef HashMap<const CachedImageClient*, SizeAndZoom> ContainerSizeRequests;
ContainerSizeRequests m_pendingContainerSizeRequests;
RefPtr<Image> m_image;
#if ENABLE(SVG)
OwnPtr<SVGImageCache> m_svgImageCache;
#endif
bool m_shouldPaintBrokenImage;
};
}
#endif
|