58 lines
2.4 KiB
C++
58 lines
2.4 KiB
C++
/*
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Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
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Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
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Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
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Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#pragma once
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#include "CachedResourceClient.h"
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#include "ImageTypes.h"
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namespace WebCore {
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class CachedImage;
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class Document;
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class IntRect;
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enum class VisibleInViewportState { Unknown, Yes, No };
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class CachedImageClient : public CachedResourceClient {
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public:
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virtual ~CachedImageClient() = default;
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static CachedResourceClientType expectedType() { return ImageType; }
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CachedResourceClientType resourceClientType() const override { return expectedType(); }
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// Called whenever a frame of an image changes because we got more data from the network.
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// If not null, the IntRect is the changed rect of the image.
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virtual void imageChanged(CachedImage*, const IntRect* = nullptr) { }
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virtual bool canDestroyDecodedData() { return true; }
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// Called when a new decoded frame for a large image is available or when an animated image is ready to advance to the next frame.
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virtual VisibleInViewportState imageFrameAvailable(CachedImage& image, ImageAnimatingState, const IntRect* changeRect) { imageChanged(&image, changeRect); return VisibleInViewportState::No; }
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virtual VisibleInViewportState imageVisibleInViewport(const Document&) const { return VisibleInViewportState::No; }
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virtual void didRemoveCachedImageClient(CachedImage&) { }
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virtual void scheduleRenderingUpdateForImage(CachedImage&) { }
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};
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} // namespace WebCore
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