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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 ImageResource_h
#define ImageResource_h
#include "core/CoreExport.h"
#include "core/fetch/MultipartImageResourceParser.h"
#include "core/fetch/Resource.h"
#include "platform/geometry/IntRect.h"
#include "platform/geometry/IntSizeHash.h"
#include "platform/geometry/LayoutSize.h"
#include "platform/graphics/ImageObserver.h"
#include "platform/graphics/ImageOrientation.h"
#include "wtf/HashMap.h"
namespace blink {
class FetchRequest;
class FloatSize;
class ImageResourceObserver;
class Length;
class MemoryCache;
class ResourceClient;
class ResourceFetcher;
class SecurityOrigin;
class CORE_EXPORT ImageResource final : public Resource, public ImageObserver, public MultipartImageResourceParser::Client {
friend class MemoryCache;
WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(ImageResource);
public:
using ClientType = ResourceClient;
static PassRefPtrWillBeRawPtr<ImageResource> fetch(FetchRequest&, ResourceFetcher*);
static PassRefPtrWillBeRawPtr<ImageResource> create(blink::Image* image)
{
return adoptRefWillBeNoop(new ImageResource(image, ResourceLoaderOptions()));
}
// Exposed for testing
static PassRefPtrWillBeRawPtr<ImageResource> create(const ResourceRequest& request, blink::Image* image)
{
return adoptRefWillBeNoop(new ImageResource(request, image, ResourceLoaderOptions()));
}
~ImageResource() override;
blink::Image* getImage(); // Returns the nullImage() if the image is not available yet.
bool hasImage() const { return m_image.get(); }
static std::pair<blink::Image*, float> brokenImage(float deviceScaleFactor); // Returns an image and the image's resolution scale factor.
bool willPaintBrokenImage() const;
bool usesImageContainerSize() const;
bool imageHasRelativeSize() const;
// The device pixel ratio we got from the server for this image, or 1.0.
float devicePixelRatioHeaderValue() const { return m_devicePixelRatioHeaderValue; }
bool hasDevicePixelRatioHeaderValue() const { return m_hasDevicePixelRatioHeaderValue; }
enum SizeType {
IntrinsicSize, // Report the intrinsic size.
IntrinsicCorrectedToDPR, // Report the intrinsic size corrected to account for image density.
};
// This method takes a zoom multiplier that can be used to increase the natural size of the image by the zoom.
LayoutSize imageSize(RespectImageOrientationEnum shouldRespectImageOrientation, float multiplier, SizeType = IntrinsicSize);
bool isAccessAllowed(SecurityOrigin*);
void updateImageAnimationPolicy();
// If this ImageResource has the Lo-Fi response headers, reload it with
// the Lo-Fi state set to off and bypassing the cache.
void reloadIfLoFi(ResourceFetcher*);
void addObserver(ImageResourceObserver*);
void removeObserver(ImageResourceObserver*);
bool hasClientsOrObservers() const override { return Resource::hasClientsOrObservers() || !m_observers.isEmpty(); }
ResourcePriority priorityFromObservers() override;
void allClientsAndObserversRemoved() override;
void appendData(const char*, size_t) override;
void error(Resource::Status) override;
void responseReceived(const ResourceResponse&, PassOwnPtr<WebDataConsumerHandle>) override;
void finish() override;
// For compatibility, images keep loading even if there are HTTP errors.
bool shouldIgnoreHTTPStatusCodeErrors() const override { return true; }
bool isImage() const override { return true; }
// ImageObserver
void decodedSizeChanged(const blink::Image*, int delta) override;
void didDraw(const blink::Image*) override;
bool shouldPauseAnimation(const blink::Image*) override;
void animationAdvanced(const blink::Image*) override;
void changedInRect(const blink::Image*, const IntRect&) override;
// MultipartImageResourceParser::Client
void onePartInMultipartReceived(const ResourceResponse&) final;
void multipartDataReceived(const char*, size_t) final;
DECLARE_VIRTUAL_TRACE();
protected:
bool isSafeToUnlock() const override;
void destroyDecodedDataIfPossible() override;
void destroyDecodedDataForFailedRevalidation() override;
private:
explicit ImageResource(blink::Image*, const ResourceLoaderOptions&);
ImageResource(const ResourceRequest&, blink::Image*, const ResourceLoaderOptions&);
enum class MultipartParsingState : uint8_t {
WaitingForFirstPart,
ParsingFirstPart,
FinishedParsingFirstPart,
};
class ImageResourceFactory : public ResourceFactory {
public:
ImageResourceFactory()
: ResourceFactory(Resource::Image) { }
PassRefPtrWillBeRawPtr<Resource> create(const ResourceRequest& request, const ResourceLoaderOptions& options, const String&) const override
{
return adoptRefWillBeNoop(new ImageResource(request, options));
}
};
ImageResource(const ResourceRequest&, const ResourceLoaderOptions&);
void clear();
void setCustomAcceptHeader();
void createImage();
void updateImage(bool allDataReceived);
void clearImage();
// If not null, changeRect is the changed part of the image.
void notifyObservers(const IntRect* changeRect = nullptr);
float m_devicePixelRatioHeaderValue;
PersistentWillBeMember<MultipartImageResourceParser> m_multipartParser;
RefPtr<blink::Image> m_image;
MultipartParsingState m_multipartParsingState = MultipartParsingState::WaitingForFirstPart;
bool m_hasDevicePixelRatioHeaderValue;
HashCountedSet<ImageResourceObserver*> m_observers;
};
DEFINE_RESOURCE_TYPE_CASTS(Image);
} // namespace blink
#endif
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